From ba4e217c907d6750aa9ca6cb8b1cb099c8a29523 Mon Sep 17 00:00:00 2001 From: Howard Chu Date: Sun, 20 Dec 2015 16:27:42 +0000 Subject: [PATCH] Update liblmdb, unify 32/64 sources --- external/db_drivers/CMakeLists.txt | 4 +- .../{liblmdb64 => liblmdb}/.gitignore | 0 .../db_drivers/{liblmdb64 => liblmdb}/CHANGES | 52 + .../{liblmdb32 => liblmdb}/CMakeLists.txt | 13 +- .../{liblmdb32 => liblmdb}/COPYRIGHT | 0 .../{liblmdb32 => liblmdb}/Doxyfile | 2 +- .../db_drivers/{liblmdb32 => liblmdb}/LICENSE | 0 .../{liblmdb64 => liblmdb}/Makefile | 28 +- external/db_drivers/liblmdb/intro.doc | 192 + .../db_drivers/{liblmdb32 => liblmdb}/lmdb.h | 91 +- .../db_drivers/{liblmdb32 => liblmdb}/mdb.c | 2823 +++-- .../{liblmdb32 => liblmdb}/mdb_copy.1 | 0 .../{liblmdb32 => liblmdb}/mdb_copy.c | 0 .../{liblmdb32 => liblmdb}/mdb_dump.1 | 2 +- .../{liblmdb32 => liblmdb}/mdb_dump.c | 13 +- .../{liblmdb32 => liblmdb}/mdb_load.1 | 2 +- .../{liblmdb32 => liblmdb}/mdb_load.c | 29 +- .../{liblmdb32 => liblmdb}/mdb_stat.1 | 2 +- .../{liblmdb64 => liblmdb}/mdb_stat.c | 27 +- .../db_drivers/{liblmdb64 => liblmdb}/midl.c | 66 +- .../db_drivers/{liblmdb32 => liblmdb}/midl.h | 26 +- .../db_drivers/{liblmdb64 => liblmdb}/mtest.c | 0 .../{liblmdb32 => liblmdb}/mtest2.c | 0 .../{liblmdb32 => liblmdb}/mtest3.c | 0 .../{liblmdb32 => liblmdb}/mtest4.c | 0 .../{liblmdb32 => liblmdb}/mtest5.c | 0 .../{liblmdb32 => liblmdb}/mtest6.c | 0 .../{liblmdb32 => liblmdb}/sample-bdb.txt | 0 .../{liblmdb32 => liblmdb}/sample-mdb.txt | 0 .../db_drivers/{liblmdb32 => liblmdb}/tooltag | 0 external/db_drivers/liblmdb32/.gitignore | 20 - external/db_drivers/liblmdb32/CHANGES | 140 - external/db_drivers/liblmdb32/Makefile | 105 - external/db_drivers/liblmdb32/mdb_stat.c | 263 - external/db_drivers/liblmdb32/midl.c | 360 - external/db_drivers/liblmdb32/mtest.c | 177 - external/db_drivers/liblmdb64/CMakeLists.txt | 43 - external/db_drivers/liblmdb64/COPYRIGHT | 20 - external/db_drivers/liblmdb64/Doxyfile | 1631 --- external/db_drivers/liblmdb64/LICENSE | 47 - external/db_drivers/liblmdb64/lmdb.h | 1556 --- external/db_drivers/liblmdb64/mdb.c | 9555 ----------------- external/db_drivers/liblmdb64/mdb_copy.1 | 54 - external/db_drivers/liblmdb64/mdb_copy.c | 82 - external/db_drivers/liblmdb64/mdb_dump.1 | 75 - external/db_drivers/liblmdb64/mdb_dump.c | 317 - external/db_drivers/liblmdb64/mdb_load.1 | 77 - external/db_drivers/liblmdb64/mdb_load.c | 454 - external/db_drivers/liblmdb64/mdb_stat.1 | 64 - external/db_drivers/liblmdb64/midl.h | 186 - external/db_drivers/liblmdb64/mtest2.c | 124 - external/db_drivers/liblmdb64/mtest3.c | 133 - external/db_drivers/liblmdb64/mtest4.c | 168 - external/db_drivers/liblmdb64/mtest5.c | 135 - external/db_drivers/liblmdb64/mtest6.c | 141 - external/db_drivers/liblmdb64/sample-bdb.txt | 73 - external/db_drivers/liblmdb64/sample-mdb.txt | 62 - external/db_drivers/liblmdb64/tooltag | 22 - 58 files changed, 2464 insertions(+), 16992 deletions(-) rename external/db_drivers/{liblmdb64 => liblmdb}/.gitignore (100%) rename external/db_drivers/{liblmdb64 => liblmdb}/CHANGES (72%) rename external/db_drivers/{liblmdb32 => liblmdb}/CMakeLists.txt (90%) rename external/db_drivers/{liblmdb32 => liblmdb}/COPYRIGHT (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/Doxyfile (99%) rename external/db_drivers/{liblmdb32 => liblmdb}/LICENSE (100%) rename external/db_drivers/{liblmdb64 => liblmdb}/Makefile (79%) create mode 100644 external/db_drivers/liblmdb/intro.doc rename external/db_drivers/{liblmdb32 => liblmdb}/lmdb.h (95%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb.c (78%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb_copy.1 (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb_copy.c (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb_dump.1 (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb_dump.c (96%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb_load.1 (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb_load.c (95%) rename external/db_drivers/{liblmdb32 => liblmdb}/mdb_stat.1 (100%) rename external/db_drivers/{liblmdb64 => liblmdb}/mdb_stat.c (89%) rename external/db_drivers/{liblmdb64 => liblmdb}/midl.c (86%) rename external/db_drivers/{liblmdb32 => liblmdb}/midl.h (91%) rename external/db_drivers/{liblmdb64 => liblmdb}/mtest.c (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mtest2.c (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mtest3.c (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mtest4.c (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mtest5.c (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/mtest6.c (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/sample-bdb.txt (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/sample-mdb.txt (100%) rename external/db_drivers/{liblmdb32 => liblmdb}/tooltag (100%) delete mode 100644 external/db_drivers/liblmdb32/.gitignore delete mode 100644 external/db_drivers/liblmdb32/CHANGES delete mode 100644 external/db_drivers/liblmdb32/Makefile delete mode 100644 external/db_drivers/liblmdb32/mdb_stat.c delete mode 100644 external/db_drivers/liblmdb32/midl.c delete mode 100644 external/db_drivers/liblmdb32/mtest.c delete mode 100644 external/db_drivers/liblmdb64/CMakeLists.txt delete mode 100644 external/db_drivers/liblmdb64/COPYRIGHT delete mode 100644 external/db_drivers/liblmdb64/Doxyfile delete mode 100644 external/db_drivers/liblmdb64/LICENSE delete mode 100644 external/db_drivers/liblmdb64/lmdb.h delete mode 100644 external/db_drivers/liblmdb64/mdb.c delete mode 100644 external/db_drivers/liblmdb64/mdb_copy.1 delete mode 100644 external/db_drivers/liblmdb64/mdb_copy.c delete mode 100644 external/db_drivers/liblmdb64/mdb_dump.1 delete mode 100644 external/db_drivers/liblmdb64/mdb_dump.c delete mode 100644 external/db_drivers/liblmdb64/mdb_load.1 delete mode 100644 external/db_drivers/liblmdb64/mdb_load.c delete mode 100644 external/db_drivers/liblmdb64/mdb_stat.1 delete mode 100644 external/db_drivers/liblmdb64/midl.h delete mode 100644 external/db_drivers/liblmdb64/mtest2.c delete mode 100644 external/db_drivers/liblmdb64/mtest3.c delete mode 100644 external/db_drivers/liblmdb64/mtest4.c delete mode 100644 external/db_drivers/liblmdb64/mtest5.c delete mode 100644 external/db_drivers/liblmdb64/mtest6.c delete mode 100644 external/db_drivers/liblmdb64/sample-bdb.txt delete mode 100644 external/db_drivers/liblmdb64/sample-mdb.txt delete mode 100644 external/db_drivers/liblmdb64/tooltag diff --git a/external/db_drivers/CMakeLists.txt b/external/db_drivers/CMakeLists.txt index 4d1b95c94..98c451ad1 100644 --- a/external/db_drivers/CMakeLists.txt +++ b/external/db_drivers/CMakeLists.txt @@ -29,6 +29,6 @@ # We aren't even going to check the system for an installed LMDB driver, as it is too # critical a consensus component to rely on dynamically linked libraries message(STATUS "Using ${ARCH_WIDTH}-bit LMDB from source tree") -add_subdirectory(liblmdb${ARCH_WIDTH}) -set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb${ARCH_WIDTH}" CACHE STRING "LMDB Include path") +add_subdirectory(liblmdb) +set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb" CACHE STRING "LMDB Include path") set(LMDB_LIBRARY "lmdb" CACHE STRING "LMDB Library name") diff --git a/external/db_drivers/liblmdb64/.gitignore b/external/db_drivers/liblmdb/.gitignore similarity index 100% rename from external/db_drivers/liblmdb64/.gitignore rename to external/db_drivers/liblmdb/.gitignore diff --git a/external/db_drivers/liblmdb64/CHANGES b/external/db_drivers/liblmdb/CHANGES similarity index 72% rename from external/db_drivers/liblmdb64/CHANGES rename to external/db_drivers/liblmdb/CHANGES index 957742e75..aabb1adfd 100644 --- a/external/db_drivers/liblmdb64/CHANGES +++ b/external/db_drivers/liblmdb/CHANGES @@ -1,5 +1,57 @@ LMDB 0.9 Change Log +LMDB 0.9.18 Release Engineering + Fix robust mutex detection on glibc 2.10-11 (ITS#8330) + Check for utf8_to_utf16 failures (ITS#7992) + Catch strdup failure in mdb_dbi_open + Build + Additional makefile var tweaks (ITS#8169) + Documentation + Add Getting Started page + + +LMDB 0.9.17 Release (2015/11/30) + Fix ITS#7377 catch calloc failure + Fix ITS#8237 regression from ITS#7589 + Fix ITS#8238 page_split for DUPFIXED pages + Fix ITS#8221 MDB_PAGE_FULL on delete/rebalance + Fix ITS#8258 rebalance/split assert + Fix ITS#8263 cursor_put cursor tracking + Fix ITS#8264 cursor_del cursor tracking + Fix ITS#8310 cursor_del cursor tracking + Fix ITS#8299 mdb_del cursor tracking + Fix ITS#8300 mdb_del cursor tracking + Fix ITS#8304 mdb_del cursor tracking + Fix ITS#7771 fakepage cursor tracking + Fix ITS#7789 ensure mapsize >= pages in use + Fix ITS#7971 mdb_txn_renew0() new reader slots + Fix ITS#7969 use __sync_synchronize on non-x86 + Fix ITS#8311 page_split from update_key + Fix ITS#8312 loose pages in nested txn + Fix ITS#8313 mdb_rebalance dummy cursor + Fix ITS#8315 dirty_room in nested txn + Fix ITS#8323 dirty_list in nested txn + Fix ITS#8316 page_merge cursor tracking + Fix ITS#8321 cursor tracking + Fix ITS#8319 mdb_load error messages + Fix ITS#8320 mdb_load plaintext input + Added mdb_txn_id() (ITS#7994) + Added robust mutex support + Miscellaneous cleanup/simplification + Build + Create install dirs if needed (ITS#8256) + Fix ThreadProc decl on Win32/MSVC (ITS#8270) + Added ssize_t typedef for MSVC (ITS#8067) + Use ANSI apis on Windows (ITS#8069) + Use O_SYNC if O_DSYNC,MDB_DSYNC are not defined (ITS#7209) + Allow passing AR to make (ITS#8168) + Allow passing mandir to make install (ITS#8169) + +LMDB 0.9.16 Release (2015/08/14) + Fix cursor EOF bug (ITS#8190) + Fix handling of subDB records (ITS#8181) + Fix mdb_midl_shrink() usage (ITS#8200) + LMDB 0.9.15 Release (2015/06/19) Fix txn init (ITS#7961,#7987) Fix MDB_PREV_DUP (ITS#7955,#7671) diff --git a/external/db_drivers/liblmdb32/CMakeLists.txt b/external/db_drivers/liblmdb/CMakeLists.txt similarity index 90% rename from external/db_drivers/liblmdb32/CMakeLists.txt rename to external/db_drivers/liblmdb/CMakeLists.txt index 293da1039..d951c83c5 100644 --- a/external/db_drivers/liblmdb32/CMakeLists.txt +++ b/external/db_drivers/liblmdb/CMakeLists.txt @@ -27,12 +27,9 @@ # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. if(FREEBSD) - set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DMDB_DSYNC=O_SYNC") + add_definitions(-DMDB_DSYNC=O_SYNC) endif() -# pass the VL32 flag so that we actually invoke the VL32 extensions -set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DVL32") - set (lmdb_sources mdb.c midl.c) @@ -44,3 +41,11 @@ add_library(lmdb target_link_libraries(lmdb LINK_PRIVATE ${CMAKE_THREAD_LIBS_INIT}) +if(WIN32) + target_link_libraries(lmdb + -lntdll) +endif() +if(${ARCH_WIDTH} EQUAL 32) + target_compile_definitions(lmdb + PUBLIC -DMDB_VL32) +endif() diff --git a/external/db_drivers/liblmdb32/COPYRIGHT b/external/db_drivers/liblmdb/COPYRIGHT similarity index 100% rename from external/db_drivers/liblmdb32/COPYRIGHT rename to external/db_drivers/liblmdb/COPYRIGHT diff --git a/external/db_drivers/liblmdb32/Doxyfile b/external/db_drivers/liblmdb/Doxyfile similarity index 99% rename from external/db_drivers/liblmdb32/Doxyfile rename to external/db_drivers/liblmdb/Doxyfile index 92d17b09e..5047c0bb1 100644 --- a/external/db_drivers/liblmdb32/Doxyfile +++ b/external/db_drivers/liblmdb/Doxyfile @@ -582,7 +582,7 @@ WARN_LOGFILE = # directories like "/usr/src/myproject". Separate the files or directories # with spaces. -INPUT = lmdb.h midl.h mdb.c midl.c +INPUT = lmdb.h midl.h mdb.c midl.c intro.doc # This tag can be used to specify the character encoding of the source files # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is diff --git a/external/db_drivers/liblmdb32/LICENSE b/external/db_drivers/liblmdb/LICENSE similarity index 100% rename from external/db_drivers/liblmdb32/LICENSE rename to external/db_drivers/liblmdb/LICENSE diff --git a/external/db_drivers/liblmdb64/Makefile b/external/db_drivers/liblmdb/Makefile similarity index 79% rename from external/db_drivers/liblmdb64/Makefile rename to external/db_drivers/liblmdb/Makefile index 2d0983eff..f3c93a2ff 100644 --- a/external/db_drivers/liblmdb64/Makefile +++ b/external/db_drivers/liblmdb/Makefile @@ -8,23 +8,31 @@ # platforms; you should not need to change any of these. # Read their descriptions in mdb.c if you do: # -# - MDB_USE_POSIX_SEM +# - MDB_USE_POSIX_MUTEX, MDB_USE_POSIX_SEM, MDB_USE_SYSV_SEM # - MDB_DSYNC # - MDB_FDATASYNC # - MDB_FDATASYNC_WORKS # - MDB_USE_PWRITEV +# - MDB_USE_ROBUST # # There may be other macros in mdb.c of interest. You should # read mdb.c before changing any of them. # CC = gcc +AR = ar W = -W -Wall -Wno-unused-parameter -Wbad-function-cast -Wuninitialized THREADS = -pthread OPT = -O2 -g CFLAGS = $(THREADS) $(OPT) $(W) $(XCFLAGS) -LDLIBS = -SOLIBS = +LDLIBS = # -lntdll # Windows needs ntdll +SOLIBS = # -lntdll prefix = /usr/local +exec_prefix = $(prefix) +bindir = $(exec_prefix)/bin +libdir = $(exec_prefix)/lib +includedir = $(prefix)/include +datarootdir = $(prefix)/share +mandir = $(datarootdir)/man ######################################################################## @@ -36,10 +44,14 @@ PROGS = $(IPROGS) mtest mtest2 mtest3 mtest4 mtest5 all: $(ILIBS) $(PROGS) install: $(ILIBS) $(IPROGS) $(IHDRS) - for f in $(IPROGS); do cp $$f $(DESTDIR)$(prefix)/bin; done - for f in $(ILIBS); do cp $$f $(DESTDIR)$(prefix)/lib; done - for f in $(IHDRS); do cp $$f $(DESTDIR)$(prefix)/include; done - for f in $(IDOCS); do cp $$f $(DESTDIR)$(prefix)/man/man1; done + mkdir -p $(DESTDIR)$(bindir) + mkdir -p $(DESTDIR)$(libdir) + mkdir -p $(DESTDIR)$(includedir) + mkdir -p $(DESTDIR)$(mandir)/man1 + for f in $(IPROGS); do cp $$f $(DESTDIR)$(bindir); done + for f in $(ILIBS); do cp $$f $(DESTDIR)$(libdir); done + for f in $(IHDRS); do cp $$f $(DESTDIR)$(includedir); done + for f in $(IDOCS); do cp $$f $(DESTDIR)$(mandir)/man1; done clean: rm -rf $(PROGS) *.[ao] *.[ls]o *~ testdb @@ -49,7 +61,7 @@ test: all ./mtest && ./mdb_stat testdb liblmdb.a: mdb.o midl.o - ar rs $@ mdb.o midl.o + $(AR) rs $@ mdb.o midl.o liblmdb.so: mdb.lo midl.lo # $(CC) $(LDFLAGS) -pthread -shared -Wl,-Bsymbolic -o $@ mdb.o midl.o $(SOLIBS) diff --git a/external/db_drivers/liblmdb/intro.doc b/external/db_drivers/liblmdb/intro.doc new file mode 100644 index 000000000..870c7bb8e --- /dev/null +++ b/external/db_drivers/liblmdb/intro.doc @@ -0,0 +1,192 @@ +/* + * Copyright 2015 Howard Chu, Symas Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . + */ +/** @page starting Getting Started + +LMDB is compact, fast, powerful, and robust and implements a simplified +variant of the BerkeleyDB (BDB) API. (BDB is also very powerful, and verbosely +documented in its own right.) After reading this page, the main +\ref mdb documentation should make sense. Thanks to Bert Hubert +for creating the + +initial version of this writeup. + +Everything starts with an environment, created by #mdb_env_create(). +Once created, this environment must also be opened with #mdb_env_open(). + +#mdb_env_open() gets passed a name which is interpreted as a directory +path. Note that this directory must exist already, it is not created +for you. Within that directory, a lock file and a storage file will be +generated. If you don't want to use a directory, you can pass the +#MDB_NOSUBDIR option, in which case the path you provided is used +directly as the data file, and another file with a "-lock" suffix +added will be used for the lock file. + +Once the environment is open, a transaction can be created within it +using #mdb_txn_begin(). Transactions may be read-write or read-only, +and read-write transactions may be nested. A transaction must only +be used by one thread at a time. Transactions are always required, +even for read-only access. The transaction provides a consistent +view of the data. + +Once a transaction has been created, a database can be opened within it +using #mdb_dbi_open(). If only one database will ever be used in the +environment, a NULL can be passed as the database name. For named +databases, the #MDB_CREATE flag must be used to create the database +if it doesn't already exist. Also, #mdb_env_set_maxdbs() must be +called after #mdb_env_create() and before #mdb_env_open() to set the +maximum number of named databases you want to support. + +Note: a single transaction can open multiple databases. Generally +databases should only be opened once, by the first transaction in +the process. After the first transaction completes, the database +handles can freely be used by all subsequent transactions. + +Within a transaction, #mdb_get() and #mdb_put() can store single +key/value pairs if that is all you need to do (but see \ref Cursors +below if you want to do more). + +A key/value pair is expressed as two #MDB_val structures. This struct +has two fields, \c mv_size and \c mv_data. The data is a \c void pointer to +an array of \c mv_size bytes. + +Because LMDB is very efficient (and usually zero-copy), the data returned +in an #MDB_val structure may be memory-mapped straight from disk. In +other words look but do not touch (or free() for that matter). +Once a transaction is closed, the values can no longer be used, so +make a copy if you need to keep them after that. + +@section Cursors Cursors + +To do more powerful things, we must use a cursor. + +Within the transaction, a cursor can be created with #mdb_cursor_open(). +With this cursor we can store/retrieve/delete (multiple) values using +#mdb_cursor_get(), #mdb_cursor_put(), and #mdb_cursor_del(). + +#mdb_cursor_get() positions itself depending on the cursor operation +requested, and for some operations, on the supplied key. For example, +to list all key/value pairs in a database, use operation #MDB_FIRST for +the first call to #mdb_cursor_get(), and #MDB_NEXT on subsequent calls, +until the end is hit. + +To retrieve all keys starting from a specified key value, use #MDB_SET. +For more cursor operations, see the \ref mdb docs. + +When using #mdb_cursor_put(), either the function will position the +cursor for you based on the \b key, or you can use operation +#MDB_CURRENT to use the current position of the cursor. Note that +\b key must then match the current position's key. + +@subsection summary Summarizing the Opening + +So we have a cursor in a transaction which opened a database in an +environment which is opened from a filesystem after it was +separately created. + +Or, we create an environment, open it from a filesystem, create a +transaction within it, open a database within that transaction, +and create a cursor within all of the above. + +Got it? + +@section thrproc Threads and Processes + +LMDB uses POSIX locks on files, and these locks have issues if one +process opens a file multiple times. Because of this, do not +#mdb_env_open() a file multiple times from a single process. Instead, +share the LMDB environment that has opened the file across all threads. +Otherwise, if a single process opens the same environment multiple times, +closing it once will remove all the locks held on it, and the other +instances will be vulnerable to corruption from other processes. + +Also note that a transaction is tied to one thread by default using +Thread Local Storage. If you want to pass read-only transactions across +threads, you can use the #MDB_NOTLS option on the environment. + +@section txns Transactions, Rollbacks, etc. + +To actually get anything done, a transaction must be committed using +#mdb_txn_commit(). Alternatively, all of a transaction's operations +can be discarded using #mdb_txn_abort(). In a read-only transaction, +any cursors will \b not automatically be freed. In a read-write +transaction, all cursors will be freed and must not be used again. + +For read-only transactions, obviously there is nothing to commit to +storage. The transaction still must eventually be aborted to close +any database handle(s) opened in it, or committed to keep the +database handles around for reuse in new transactions. + +In addition, as long as a transaction is open, a consistent view of +the database is kept alive, which requires storage. A read-only +transaction that no longer requires this consistent view should +be terminated (committed or aborted) when the view is no longer +needed (but see below for an optimization). + +There can be multiple simultaneously active read-only transactions +but only one that can write. Once a single read-write transaction +is opened, all further attempts to begin one will block until the +first one is committed or aborted. This has no effect on read-only +transactions, however, and they may continue to be opened at any time. + +@section dupkeys Duplicate Keys + +#mdb_get() and #mdb_put() respectively have no and only some support +for multiple key/value pairs with identical keys. If there are multiple +values for a key, #mdb_get() will only return the first value. + +When multiple values for one key are required, pass the #MDB_DUPSORT +flag to #mdb_dbi_open(). In an #MDB_DUPSORT database, by default +#mdb_put() will not replace the value for a key if the key existed +already. Instead it will add the new value to the key. In addition, +#mdb_del() will pay attention to the value field too, allowing for +specific values of a key to be deleted. + +Finally, additional cursor operations become available for +traversing through and retrieving duplicate values. + +@section optim Some Optimization + +If you frequently begin and abort read-only transactions, as an +optimization, it is possible to only reset and renew a transaction. + +#mdb_txn_reset() releases any old copies of data kept around for +a read-only transaction. To reuse this reset transaction, call +#mdb_txn_renew() on it. Any cursors in this transaction must also +be renewed using #mdb_cursor_renew(). + +Note that #mdb_txn_reset() is similar to #mdb_txn_abort() and will +close any databases you opened within the transaction. + +To permanently free a transaction, reset or not, use #mdb_txn_abort(). + +@section cleanup Cleaning Up + +For read-only transactions, any cursors created within it must +be closed using #mdb_cursor_close(). + +It is very rarely necessary to close a database handle, and in +general they should just be left open. + +@section onward The Full API + +The full \ref mdb documentation lists further details, like how to: + + \li size a database (the default limits are intentionally small) + \li drop and clean a database + \li detect and report errors + \li optimize (bulk) loading speed + \li (temporarily) reduce robustness to gain even more speed + \li gather statistics about the database + \li define custom sort orders + +*/ diff --git a/external/db_drivers/liblmdb32/lmdb.h b/external/db_drivers/liblmdb/lmdb.h similarity index 95% rename from external/db_drivers/liblmdb32/lmdb.h rename to external/db_drivers/liblmdb/lmdb.h index 2f523579c..587a44eaf 100644 --- a/external/db_drivers/liblmdb32/lmdb.h +++ b/external/db_drivers/liblmdb/lmdb.h @@ -40,6 +40,9 @@ * corrupt the database. Of course if your application code is known to * be bug-free (...) then this is not an issue. * + * If this is your first time using a transactional embedded key/value + * store, you may find the \ref starting page to be helpful. + * * @section caveats_sec Caveats * Troubleshooting the lock file, plus semaphores on BSD systems: * @@ -49,11 +52,16 @@ * stale locks can block further operation. * * Fix: Check for stale readers periodically, using the - * #mdb_reader_check function or the \ref mdb_stat_1 "mdb_stat" tool. Or just - * make all programs using the database close it; the lockfile - * is always reset on first open of the environment. + * #mdb_reader_check function or the \ref mdb_stat_1 "mdb_stat" tool. + * Stale writers will be cleared automatically on most systems: + * - Windows - automatic + * - BSD, systems using SysV semaphores - automatic + * - Linux, systems using POSIX mutexes with Robust option - automatic + * Otherwise just make all programs using the database close it; + * the lockfile is always reset on first open of the environment. * - * - On BSD systems or others configured with MDB_USE_POSIX_SEM, + * - On BSD systems or others configured with MDB_USE_SYSV_SEM or + * MDB_USE_POSIX_SEM, * startup can fail due to semaphores owned by another userid. * * Fix: Open and close the database as the user which owns the @@ -106,6 +114,9 @@ * for stale readers is performed or the lockfile is reset, * since the process may not remove it from the lockfile. * + * This does not apply to write transactions if the system clears + * stale writers, see above. + * * - If you do that anyway, do a periodic check for stale readers. Or * close the environment once in a while, so the lockfile can get reset. * @@ -150,6 +161,7 @@ #define _LMDB_H_ #include +#include #ifdef __cplusplus extern "C" { @@ -162,6 +174,13 @@ typedef int mdb_mode_t; typedef mode_t mdb_mode_t; #endif +#ifdef MDB_VL32 +typedef uint64_t mdb_size_t; +#define mdb_env_create(env) mdb_env_create_vl32(env) /**< Prevent mixing with non-VL32 builds */ +#else +typedef size_t mdb_size_t; +#endif + /** An abstraction for a file handle. * On POSIX systems file handles are small integers. On Windows * they're opaque pointers. @@ -184,7 +203,7 @@ typedef int mdb_filehandle_t; /** Library minor version */ #define MDB_VERSION_MINOR 9 /** Library patch version */ -#define MDB_VERSION_PATCH 15 +#define MDB_VERSION_PATCH 70 /** Combine args a,b,c into a single integer for easy version comparisons */ #define MDB_VERINT(a,b,c) (((a) << 24) | ((b) << 16) | (c)) @@ -194,7 +213,7 @@ typedef int mdb_filehandle_t; MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH) /** The release date of this library version */ -#define MDB_VERSION_DATE "June 19, 2015" +#define MDB_VERSION_DATE "December 19, 2015" /** A stringifier for the version info */ #define MDB_VERSTR(a,b,c,d) "LMDB " #a "." #b "." #c ": (" d ")" @@ -391,7 +410,7 @@ typedef enum MDB_cursor_op { #define MDB_PAGE_NOTFOUND (-30797) /** Located page was wrong type */ #define MDB_CORRUPTED (-30796) - /** Update of meta page failed, probably I/O error */ + /** Update of meta page failed or environment had fatal error */ #define MDB_PANIC (-30795) /** Environment version mismatch */ #define MDB_VERSION_MISMATCH (-30794) @@ -413,11 +432,18 @@ typedef enum MDB_cursor_op { #define MDB_PAGE_FULL (-30786) /** Database contents grew beyond environment mapsize */ #define MDB_MAP_RESIZED (-30785) - /** MDB_INCOMPATIBLE: Operation and DB incompatible, or DB flags changed */ + /** Operation and DB incompatible, or DB type changed. This can mean: + *
    + *
  • The operation expects an #MDB_DUPSORT / #MDB_DUPFIXED database. + *
  • Opening a named DB when the unnamed DB has #MDB_DUPSORT / #MDB_INTEGERKEY. + *
  • Accessing a data record as a database, or vice versa. + *
  • The database was dropped and recreated with different flags. + *
+ */ #define MDB_INCOMPATIBLE (-30784) /** Invalid reuse of reader locktable slot */ #define MDB_BAD_RSLOT (-30783) - /** Transaction cannot recover - it must be aborted */ + /** Transaction must abort, has a child, or is invalid */ #define MDB_BAD_TXN (-30782) /** Unsupported size of key/DB name/data, or wrong DUPFIXED size */ #define MDB_BAD_VALSIZE (-30781) @@ -432,18 +458,18 @@ typedef struct MDB_stat { unsigned int ms_psize; /**< Size of a database page. This is currently the same for all databases. */ unsigned int ms_depth; /**< Depth (height) of the B-tree */ - size_t ms_branch_pages; /**< Number of internal (non-leaf) pages */ - size_t ms_leaf_pages; /**< Number of leaf pages */ - size_t ms_overflow_pages; /**< Number of overflow pages */ - size_t ms_entries; /**< Number of data items */ + mdb_size_t ms_branch_pages; /**< Number of internal (non-leaf) pages */ + mdb_size_t ms_leaf_pages; /**< Number of leaf pages */ + mdb_size_t ms_overflow_pages; /**< Number of overflow pages */ + mdb_size_t ms_entries; /**< Number of data items */ } MDB_stat; /** @brief Information about the environment */ typedef struct MDB_envinfo { void *me_mapaddr; /**< Address of map, if fixed */ - size_t me_mapsize; /**< Size of the data memory map */ - size_t me_last_pgno; /**< ID of the last used page */ - size_t me_last_txnid; /**< ID of the last committed transaction */ + mdb_size_t me_mapsize; /**< Size of the data memory map */ + mdb_size_t me_last_pgno; /**< ID of the last used page */ + mdb_size_t me_last_txnid; /**< ID of the last committed transaction */ unsigned int me_maxreaders; /**< max reader slots in the environment */ unsigned int me_numreaders; /**< max reader slots used in the environment */ } MDB_envinfo; @@ -810,7 +836,7 @@ int mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *fd); * an active write transaction. * */ -int mdb_env_set_mapsize(MDB_env *env, size_t size); +int mdb_env_set_mapsize(MDB_env *env, mdb_size_t size); /** @brief Set the maximum number of threads/reader slots for the environment. * @@ -923,6 +949,10 @@ int mdb_env_set_assert(MDB_env *env, MDB_assert_func *func); *
    *
  • #MDB_RDONLY * This transaction will not perform any write operations. + *
  • #MDB_NOSYNC + * Don't flush system buffers to disk when committing this transaction. + *
  • #MDB_NOMETASYNC + * Flush system buffers but omit metadata flush when committing this transaction. *
* @param[out] txn Address where the new #MDB_txn handle will be stored * @return A non-zero error value on failure and 0 on success. Some possible @@ -946,6 +976,17 @@ int mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn ** */ MDB_env *mdb_txn_env(MDB_txn *txn); + /** @brief Return the transaction's ID. + * + * This returns the identifier associated with this transaction. For a + * read-only transaction, this corresponds to the snapshot being read; + * concurrent readers will frequently have the same transaction ID. + * + * @param[in] txn A transaction handle returned by #mdb_txn_begin() + * @return A transaction ID, valid if input is an active transaction. + */ +mdb_size_t mdb_txn_id(MDB_txn *txn); + /** @brief Commit all the operations of a transaction into the database. * * The transaction handle is freed. It and its cursors must not be used @@ -1034,8 +1075,9 @@ int mdb_txn_renew(MDB_txn *txn); * any other transaction in the process may use this function. * * To use named databases (with name != NULL), #mdb_env_set_maxdbs() - * must be called before opening the environment. Database names - * are kept as keys in the unnamed database. + * must be called before opening the environment. Database names are + * keys in the unnamed database, and may be read but not written. + * * @param[in] txn A transaction handle returned by #mdb_txn_begin() * @param[in] name The name of the database to open. If only a single * database is needed in the environment, this value may be NULL. @@ -1272,7 +1314,8 @@ int mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data); * the next update operation or the transaction ends. This saves * an extra memcpy if the data is being generated later. * LMDB does nothing else with this memory, the caller is expected - * to modify all of the space requested. + * to modify all of the space requested. This flag must not be + * specified if the database was opened with #MDB_DUPSORT. *
  • #MDB_APPEND - append the given key/data pair to the end of the * database. This option allows fast bulk loading when keys are * already known to be in the correct order. Loading unsorted keys @@ -1428,13 +1471,15 @@ int mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data, * the database supports duplicates (#MDB_DUPSORT). *
  • #MDB_RESERVE - reserve space for data of the given size, but * don't copy the given data. Instead, return a pointer to the - * reserved space, which the caller can fill in later. This saves - * an extra memcpy if the data is being generated later. + * reserved space, which the caller can fill in later - before + * the next update operation or the transaction ends. This saves + * an extra memcpy if the data is being generated later. This flag + * must not be specified if the database was opened with #MDB_DUPSORT. *
  • #MDB_APPEND - append the given key/data pair to the end of the * database. No key comparisons are performed. This option allows * fast bulk loading when keys are already known to be in the * correct order. Loading unsorted keys with this flag will cause - * data corruption. + * a #MDB_KEYEXIST error. *
  • #MDB_APPENDDUP - as above, but for sorted dup data. *
  • #MDB_MULTIPLE - store multiple contiguous data elements in a * single request. This flag may only be specified if the database diff --git a/external/db_drivers/liblmdb32/mdb.c b/external/db_drivers/liblmdb/mdb.c similarity index 78% rename from external/db_drivers/liblmdb32/mdb.c rename to external/db_drivers/liblmdb/mdb.c index dd3d5848f..e42c34498 100644 --- a/external/db_drivers/liblmdb32/mdb.c +++ b/external/db_drivers/liblmdb/mdb.c @@ -35,9 +35,42 @@ #ifndef _GNU_SOURCE #define _GNU_SOURCE 1 #endif +#ifdef MDB_VL32 +#define _FILE_OFFSET_BITS 64 +#endif #ifdef _WIN32 #include #include + +/* We use native NT APIs to setup the memory map, so that we can + * let the DB file grow incrementally instead of always preallocating + * the full size. These APIs are defined in and + * but those headers are meant for driver-level development and + * conflict with the regular user-level headers, so we explicitly + * declare them here. Using these APIs also means we must link to + * ntdll.dll, which is not linked by default in user code. + */ +NTSTATUS WINAPI +NtCreateSection(OUT PHANDLE sh, IN ACCESS_MASK acc, + IN void * oa OPTIONAL, + IN PLARGE_INTEGER ms OPTIONAL, + IN ULONG pp, IN ULONG aa, IN HANDLE fh OPTIONAL); + +typedef enum _SECTION_INHERIT { + ViewShare = 1, + ViewUnmap = 2 +} SECTION_INHERIT; + +NTSTATUS WINAPI +NtMapViewOfSection(IN PHANDLE sh, IN HANDLE ph, + IN OUT PVOID *addr, IN ULONG_PTR zbits, + IN SIZE_T cs, IN OUT PLARGE_INTEGER off OPTIONAL, + IN OUT PSIZE_T vs, IN SECTION_INHERIT ih, + IN ULONG at, IN ULONG pp); + +NTSTATUS WINAPI +NtClose(HANDLE h); + /** getpid() returns int; MinGW defines pid_t but MinGW64 typedefs it * as int64 which is wrong. MSVC doesn't define it at all, so just * don't use it. @@ -96,7 +129,13 @@ extern int cacheflush(char *addr, int nbytes, int cache); #include #include #include + +#ifdef _MSC_VER +#include +typedef SSIZE_T ssize_t; +#else #include +#endif #if defined(__sun) || defined(ANDROID) /* Most platforms have posix_memalign, older may only have memalign */ @@ -110,7 +149,9 @@ extern int cacheflush(char *addr, int nbytes, int cache); #endif #if defined(__APPLE__) || defined (BSD) -# define MDB_USE_POSIX_SEM 1 +# if !(defined(MDB_USE_POSIX_MUTEX) || defined(MDB_USE_POSIX_SEM)) +# define MDB_USE_SYSV_SEM 1 +# endif # define MDB_FDATASYNC fsync #elif defined(ANDROID) # define MDB_FDATASYNC fsync @@ -121,7 +162,24 @@ extern int cacheflush(char *addr, int nbytes, int cache); #ifdef MDB_USE_POSIX_SEM # define MDB_USE_HASH 1 #include -#endif +#elif defined(MDB_USE_SYSV_SEM) +#include +#include +#ifdef _SEM_SEMUN_UNDEFINED +union semun { + int val; + struct semid_ds *buf; + unsigned short *array; +}; +#endif /* _SEM_SEMUN_UNDEFINED */ +#else +#define MDB_USE_POSIX_MUTEX 1 +#endif /* MDB_USE_POSIX_SEM */ +#endif /* !_WIN32 */ + +#if defined(_WIN32) + defined(MDB_USE_POSIX_SEM) + defined(MDB_USE_SYSV_SEM) \ + + defined(MDB_USE_POSIX_MUTEX) != 1 +# error "Ambiguous shared-lock implementation" #endif #ifdef USE_VALGRIND @@ -185,6 +243,12 @@ extern int cacheflush(char *addr, int nbytes, int cache); #define ESECT #endif +#ifdef _WIN32 +#define CALL_CONV WINAPI +#else +#define CALL_CONV +#endif + /** @defgroup internal LMDB Internals * @{ */ @@ -211,6 +275,47 @@ extern int cacheflush(char *addr, int nbytes, int cache); # define mdb_func_ "" #endif +/* Internal error codes, not exposed outside liblmdb */ +#define MDB_NO_ROOT (MDB_LAST_ERRCODE + 10) +#ifdef _WIN32 +#define MDB_OWNERDEAD ((int) WAIT_ABANDONED) +#elif defined MDB_USE_SYSV_SEM +#define MDB_OWNERDEAD (MDB_LAST_ERRCODE + 11) +#elif defined(MDB_USE_POSIX_MUTEX) && defined(EOWNERDEAD) +#define MDB_OWNERDEAD EOWNERDEAD /**< #LOCK_MUTEX0() result if dead owner */ +#endif + +#ifdef __GLIBC__ +#define GLIBC_VER ((__GLIBC__ << 16 )| __GLIBC_MINOR__) +#endif +/** Some platforms define the EOWNERDEAD error code + * even though they don't support Robust Mutexes. + * Compile with -DMDB_USE_ROBUST=0, or use some other + * mechanism like -DMDB_USE_SYSV_SEM instead of + * -DMDB_USE_POSIX_MUTEX. (SysV semaphores are + * also Robust, but some systems don't support them + * either.) + */ +#ifndef MDB_USE_ROBUST +/* Android currently lacks Robust Mutex support. So does glibc < 2.4. */ +# if defined(MDB_USE_POSIX_MUTEX) && (defined(ANDROID) || \ + (defined(__GLIBC__) && GLIBC_VER < 0x020004)) +# define MDB_USE_ROBUST 0 +# else +# define MDB_USE_ROBUST 1 +/* glibc < 2.12 only provided _np API */ +# if defined(__GLIBC__) && GLIBC_VER < 0x02000c +# define PTHREAD_MUTEX_ROBUST PTHREAD_MUTEX_ROBUST_NP +# define pthread_mutexattr_setrobust(attr, flag) pthread_mutexattr_setrobust_np(attr, flag) +# define pthread_mutex_consistent(mutex) pthread_mutex_consistent_np(mutex) +# endif +# endif +#endif /* MDB_USE_ROBUST */ + +#if defined(MDB_OWNERDEAD) && MDB_USE_ROBUST +#define MDB_ROBUST_SUPPORTED 1 +#endif + #ifdef _WIN32 #define MDB_USE_HASH 1 #define MDB_PIDLOCK 0 @@ -218,6 +323,7 @@ extern int cacheflush(char *addr, int nbytes, int cache); #define pthread_t HANDLE #define pthread_mutex_t HANDLE #define pthread_cond_t HANDLE +typedef HANDLE mdb_mutex_t, mdb_mutexref_t; #define pthread_key_t DWORD #define pthread_self() GetCurrentThreadId() #define pthread_key_create(x,y) \ @@ -231,10 +337,9 @@ extern int cacheflush(char *addr, int nbytes, int cache); #define pthread_cond_wait(cond,mutex) do{SignalObjectAndWait(*mutex, *cond, INFINITE, FALSE); WaitForSingleObject(*mutex, INFINITE);}while(0) #define THREAD_CREATE(thr,start,arg) thr=CreateThread(NULL,0,start,arg,0,NULL) #define THREAD_FINISH(thr) WaitForSingleObject(thr, INFINITE) -#define LOCK_MUTEX_R(env) pthread_mutex_lock(&(env)->me_rmutex) -#define UNLOCK_MUTEX_R(env) pthread_mutex_unlock(&(env)->me_rmutex) -#define LOCK_MUTEX_W(env) pthread_mutex_lock(&(env)->me_wmutex) -#define UNLOCK_MUTEX_W(env) pthread_mutex_unlock(&(env)->me_wmutex) +#define LOCK_MUTEX0(mutex) WaitForSingleObject(mutex, INFINITE) +#define UNLOCK_MUTEX(mutex) ReleaseMutex(mutex) +#define mdb_mutex_consistent(mutex) 0 #define getpid() GetCurrentProcessId() #define MDB_FDATASYNC(fd) (!FlushFileBuffers(fd)) #define MDB_MSYNC(addr,len,flags) (!FlushViewOfFile(addr,len)) @@ -259,10 +364,9 @@ extern int cacheflush(char *addr, int nbytes, int cache); #ifdef MDB_USE_POSIX_SEM -#define LOCK_MUTEX_R(env) mdb_sem_wait((env)->me_rmutex) -#define UNLOCK_MUTEX_R(env) sem_post((env)->me_rmutex) -#define LOCK_MUTEX_W(env) mdb_sem_wait((env)->me_wmutex) -#define UNLOCK_MUTEX_W(env) sem_post((env)->me_wmutex) +typedef sem_t *mdb_mutex_t, *mdb_mutexref_t; +#define LOCK_MUTEX0(mutex) mdb_sem_wait(mutex) +#define UNLOCK_MUTEX(mutex) sem_post(mutex) static int mdb_sem_wait(sem_t *sem) @@ -272,23 +376,61 @@ mdb_sem_wait(sem_t *sem) return rc; } -#else - /** Lock the reader mutex. +#elif defined MDB_USE_SYSV_SEM + +typedef struct mdb_mutex { + int semid; + int semnum; + int *locked; +} mdb_mutex_t[1], *mdb_mutexref_t; + +#define LOCK_MUTEX0(mutex) mdb_sem_wait(mutex) +#define UNLOCK_MUTEX(mutex) do { \ + struct sembuf sb = { 0, 1, SEM_UNDO }; \ + sb.sem_num = (mutex)->semnum; \ + *(mutex)->locked = 0; \ + semop((mutex)->semid, &sb, 1); \ +} while(0) + +static int +mdb_sem_wait(mdb_mutexref_t sem) +{ + int rc, *locked = sem->locked; + struct sembuf sb = { 0, -1, SEM_UNDO }; + sb.sem_num = sem->semnum; + do { + if (!semop(sem->semid, &sb, 1)) { + rc = *locked ? MDB_OWNERDEAD : MDB_SUCCESS; + *locked = 1; + break; + } + } while ((rc = errno) == EINTR); + return rc; +} + +#define mdb_mutex_consistent(mutex) 0 + +#else /* MDB_USE_POSIX_MUTEX: */ + /** Shared mutex/semaphore as it is stored (mdb_mutex_t), and as + * local variables keep it (mdb_mutexref_t). + * + * An mdb_mutex_t can be assigned to an mdb_mutexref_t. They can + * be the same, or an array[size 1] and a pointer. + * @{ */ -#define LOCK_MUTEX_R(env) pthread_mutex_lock(&(env)->me_txns->mti_mutex) - /** Unlock the reader mutex. +typedef pthread_mutex_t mdb_mutex_t[1], *mdb_mutexref_t; + /* @} */ + /** Lock the reader or writer mutex. + * Returns 0 or a code to give #mdb_mutex_failed(), as in #LOCK_MUTEX(). */ -#define UNLOCK_MUTEX_R(env) pthread_mutex_unlock(&(env)->me_txns->mti_mutex) - - /** Lock the writer mutex. - * Only a single write transaction is allowed at a time. Other writers - * will block waiting for this mutex. +#define LOCK_MUTEX0(mutex) pthread_mutex_lock(mutex) + /** Unlock the reader or writer mutex. */ -#define LOCK_MUTEX_W(env) pthread_mutex_lock(&(env)->me_txns->mti_wmutex) - /** Unlock the writer mutex. +#define UNLOCK_MUTEX(mutex) pthread_mutex_unlock(mutex) + /** Mark mutex-protected data as repaired, after death of previous owner. */ -#define UNLOCK_MUTEX_W(env) pthread_mutex_unlock(&(env)->me_txns->mti_wmutex) -#endif /* MDB_USE_POSIX_SEM */ +#define mdb_mutex_consistent(mutex) pthread_mutex_consistent(mutex) +#endif /* MDB_USE_POSIX_SEM || MDB_USE_SYSV_SEM */ /** Get the error code for the last failed system function. */ @@ -313,14 +455,46 @@ mdb_sem_wait(sem_t *sem) #define GET_PAGESIZE(x) ((x) = sysconf(_SC_PAGE_SIZE)) #endif +#ifndef MDB_VL32 +#define Yd Z"d" +#define Yu Z"u" +#elif defined _WIN32 +#define Yd "I64d" +#define Yu "I64u" +#else +#define Yd PRId64 +#define Yu PRIu64 +#endif + #if defined(_WIN32) || defined(MDB_USE_POSIX_SEM) #define MNAME_LEN 32 +#elif defined(MDB_USE_SYSV_SEM) +#define MNAME_LEN (sizeof(int)) #else #define MNAME_LEN (sizeof(pthread_mutex_t)) #endif +#ifdef MDB_USE_SYSV_SEM +#define SYSV_SEM_FLAG 1 /**< SysV sems in lockfile format */ +#else +#define SYSV_SEM_FLAG 0 +#endif + /** @} */ +#ifdef MDB_ROBUST_SUPPORTED + /** Lock mutex, handle any error, set rc = result. + * Return 0 on success, nonzero (not rc) on error. + */ +#define LOCK_MUTEX(rc, env, mutex) \ + (((rc) = LOCK_MUTEX0(mutex)) && \ + ((rc) = mdb_mutex_failed(env, mutex, rc))) +static int mdb_mutex_failed(MDB_env *env, mdb_mutexref_t mutex, int rc); +#else +#define LOCK_MUTEX(rc, env, mutex) ((rc) = LOCK_MUTEX0(mutex)) +#define mdb_mutex_failed(env, mutex, rc) (rc) +#endif + #ifndef _WIN32 /** A flag for opening a file and requesting synchronous data writes. * This is only used when writing a meta page. It's not strictly needed; @@ -329,10 +503,13 @@ mdb_sem_wait(sem_t *sem) * * @note If O_DSYNC is undefined but exists in /usr/include, * preferably set some compiler flag to get the definition. - * Otherwise compile with the less efficient -DMDB_DSYNC=O_SYNC. */ #ifndef MDB_DSYNC +# ifdef O_DSYNC # define MDB_DSYNC O_DSYNC +# else +# define MDB_DSYNC O_SYNC +# endif #endif #endif @@ -444,7 +621,7 @@ static txnid_t mdb_debug_start; /** The version number for a database's datafile format. */ #define MDB_DATA_VERSION ((MDB_DEVEL) ? 999 : 1) /** The version number for a database's lockfile format. */ -#define MDB_LOCK_VERSION 1 +#define MDB_LOCK_VERSION ((MDB_DEVEL) ? 999 : 1) /** @brief The max size of a key we can write, or 0 for computed max. * @@ -635,11 +812,14 @@ typedef struct MDB_txbody { uint32_t mtb_format; #if defined(_WIN32) || defined(MDB_USE_POSIX_SEM) char mtb_rmname[MNAME_LEN]; +#elif defined(MDB_USE_SYSV_SEM) + int mtb_semid; + int mtb_rlocked; #else /** Mutex protecting access to this table. - * This is the reader lock that #LOCK_MUTEX_R acquires. + * This is the reader table lock used with LOCK_MUTEX(). */ - pthread_mutex_t mtb_mutex; + mdb_mutex_t mtb_rmutex; #endif /** The ID of the last transaction committed to the database. * This is recorded here only for convenience; the value can always @@ -659,18 +839,25 @@ typedef struct MDB_txninfo { MDB_txbody mtb; #define mti_magic mt1.mtb.mtb_magic #define mti_format mt1.mtb.mtb_format -#define mti_mutex mt1.mtb.mtb_mutex +#define mti_rmutex mt1.mtb.mtb_rmutex #define mti_rmname mt1.mtb.mtb_rmname #define mti_txnid mt1.mtb.mtb_txnid #define mti_numreaders mt1.mtb.mtb_numreaders +#ifdef MDB_USE_SYSV_SEM +#define mti_semid mt1.mtb.mtb_semid +#define mti_rlocked mt1.mtb.mtb_rlocked +#endif char pad[(sizeof(MDB_txbody)+CACHELINE-1) & ~(CACHELINE-1)]; } mt1; union { #if defined(_WIN32) || defined(MDB_USE_POSIX_SEM) char mt2_wmname[MNAME_LEN]; #define mti_wmname mt2.mt2_wmname +#elif defined MDB_USE_SYSV_SEM + int mt2_wlocked; +#define mti_wlocked mt2.mt2_wlocked #else - pthread_mutex_t mt2_wmutex; + mdb_mutex_t mt2_wmutex; #define mti_wmutex mt2.mt2_wmutex #endif char pad[(MNAME_LEN+CACHELINE-1) & ~(CACHELINE-1)]; @@ -683,6 +870,7 @@ typedef struct MDB_txninfo { ((uint32_t) \ ((MDB_LOCK_VERSION) \ /* Flags which describe functionality */ \ + + (SYSV_SEM_FLAG << 18) \ + (((MDB_PIDLOCK) != 0) << 16))) /** @} */ @@ -888,7 +1076,7 @@ typedef struct MDB_db { pgno_t md_branch_pages; /**< number of internal pages */ pgno_t md_leaf_pages; /**< number of leaf pages */ pgno_t md_overflow_pages; /**< number of overflow pages */ - size_t md_entries; /**< number of data items */ + pgno_t md_entries; /**< number of data items */ pgno_t md_root; /**< the root page of this tree */ } MDB_db; @@ -902,6 +1090,11 @@ typedef struct MDB_db { #define FREE_DBI 0 /** Handle for the default DB. */ #define MAIN_DBI 1 + /** Number of DBs in metapage (free and main) - also hardcoded elsewhere */ +#define CORE_DBS 2 + + /** Number of meta pages - also hardcoded elsewhere */ +#define NUM_METAS 2 /** Meta page content. * A meta page is the start point for accessing a database snapshot. @@ -913,13 +1106,21 @@ typedef struct MDB_meta { uint32_t mm_magic; /** Version number of this file. Must be set to #MDB_DATA_VERSION. */ uint32_t mm_version; +#ifdef MDB_VL32 + union { /* always zero since we don't support fixed mapping in MDB_VL32 */ + MDB_ID mmun_ull; + void *mmun_address; + } mm_un; +#define mm_address mm_un.mmun_address +#else void *mm_address; /**< address for fixed mapping */ - size_t mm_mapsize; /**< size of mmap region */ - MDB_db mm_dbs[2]; /**< first is free space, 2nd is main db */ +#endif + pgno_t mm_mapsize; /**< size of mmap region */ + MDB_db mm_dbs[CORE_DBS]; /**< first is free space, 2nd is main db */ /** The size of pages used in this DB */ -#define mm_psize mm_dbs[0].md_pad +#define mm_psize mm_dbs[FREE_DBI].md_pad /** Any persistent environment flags. @ref mdb_env */ -#define mm_flags mm_dbs[0].md_flags +#define mm_flags mm_dbs[FREE_DBI].md_flags pgno_t mm_last_pg; /**< last used page in file */ volatile txnid_t mm_txnid; /**< txnid that committed this page */ } MDB_meta; @@ -954,8 +1155,12 @@ typedef struct MDB_dbx { */ struct MDB_txn { MDB_txn *mt_parent; /**< parent of a nested txn */ - MDB_txn *mt_child; /**< nested txn under this txn */ + /** Nested txn under this txn, set together with flag #MDB_TXN_HAS_CHILD */ + MDB_txn *mt_child; pgno_t mt_next_pgno; /**< next unallocated page */ +#ifdef MDB_VL32 + pgno_t mt_last_pgno; /**< last written page */ +#endif /** The ID of this transaction. IDs are integers incrementing from 1. * Only committed write transactions increment the ID. If a transaction * aborts, the ID may be re-used by the next writer. @@ -996,17 +1201,28 @@ struct MDB_txn { #define DB_STALE 0x02 /**< Named-DB record is older than txnID */ #define DB_NEW 0x04 /**< Named-DB handle opened in this txn */ #define DB_VALID 0x08 /**< DB handle is valid, see also #MDB_VALID */ +#define DB_USRVALID 0x10 /**< As #DB_VALID, but not set for #FREE_DBI */ /** @} */ /** In write txns, array of cursors for each DB */ MDB_cursor **mt_cursors; /** Array of flags for each DB */ unsigned char *mt_dbflags; -#ifdef VL32 - /** List of read-only pages */ - MDB_ID2L mt_rpages; -#endif - /** Number of DB records in use. This number only ever increments; - * we don't decrement it when individual DB handles are closed. +#ifdef MDB_VL32 + /** List of read-only pages (actually chunks) */ + MDB_ID3L mt_rpages; + /** We map chunks of 16 pages. Even though Windows uses 4KB pages, all + * mappings must begin on 64KB boundaries. So we round off all pgnos to + * a chunk boundary. We do the same on Linux for symmetry, and also to + * reduce the frequency of mmap/munmap calls. + */ +#define MDB_RPAGE_CHUNK 16 +#define MDB_TRPAGE_SIZE 4096 /**< size of #mt_rpages array of chunks */ +#define MDB_TRPAGE_MAX (MDB_TRPAGE_SIZE-1) /**< maximum chunk index */ + unsigned int mt_rpcheck; /**< threshold for reclaiming unref'd chunks */ +#endif + /** Number of DB records in use, or 0 when the txn is finished. + * This number only ever increments until the txn finishes; we + * don't decrement it when individual DB handles are closed. */ MDB_dbi mt_numdbs; @@ -1014,10 +1230,20 @@ struct MDB_txn { * @ingroup internal * @{ */ -#define MDB_TXN_RDONLY 0x01 /**< read-only transaction */ + /** #mdb_txn_begin() flags */ +#define MDB_TXN_BEGIN_FLAGS (MDB_NOMETASYNC|MDB_NOSYNC|MDB_RDONLY) +#define MDB_TXN_NOMETASYNC MDB_NOMETASYNC /**< don't sync meta for this txn on commit */ +#define MDB_TXN_NOSYNC MDB_NOSYNC /**< don't sync this txn on commit */ +#define MDB_TXN_RDONLY MDB_RDONLY /**< read-only transaction */ + /* internal txn flags */ +#define MDB_TXN_WRITEMAP MDB_WRITEMAP /**< copy of #MDB_env flag in writers */ +#define MDB_TXN_FINISHED 0x01 /**< txn is finished or never began */ #define MDB_TXN_ERROR 0x02 /**< txn is unusable after an error */ #define MDB_TXN_DIRTY 0x04 /**< must write, even if dirty list is empty */ #define MDB_TXN_SPILLS 0x08 /**< txn or a parent has spilled pages */ +#define MDB_TXN_HAS_CHILD 0x10 /**< txn has an #MDB_txn.%mt_child */ + /** most operations on the txn are currently illegal */ +#define MDB_TXN_BLOCKED (MDB_TXN_FINISHED|MDB_TXN_ERROR|MDB_TXN_HAS_CHILD) /** @} */ unsigned int mt_flags; /**< @ref mdb_txn */ /** #dirty_list room: Array size - \#dirty pages visible to this txn. @@ -1072,12 +1298,20 @@ struct MDB_cursor { #define C_EOF 0x02 /**< No more data */ #define C_SUB 0x04 /**< Cursor is a sub-cursor */ #define C_DEL 0x08 /**< last op was a cursor_del */ -#define C_SPLITTING 0x20 /**< Cursor is in page_split */ #define C_UNTRACK 0x40 /**< Un-track cursor when closing */ +#define C_WRITEMAP MDB_TXN_WRITEMAP /**< Copy of txn flag */ +/** Read-only cursor into the txn's original snapshot in the map. + * Set for read-only txns, and in #mdb_page_alloc() for #FREE_DBI when + * #MDB_DEVEL & 2. Only implements code which is necessary for this. + */ +#define C_ORIG_RDONLY MDB_TXN_RDONLY /** @} */ unsigned int mc_flags; /**< @ref mdb_cursor */ MDB_page *mc_pg[CURSOR_STACK]; /**< stack of pushed pages */ indx_t mc_ki[CURSOR_STACK]; /**< stack of page indices */ +#ifdef MDB_VL32 + MDB_page *mc_ovpg; /**< a referenced overflow page */ +#endif }; /** Context for sorted-dup records. @@ -1107,7 +1341,7 @@ struct MDB_env { HANDLE me_fd; /**< The main data file */ HANDLE me_lfd; /**< The lock file */ HANDLE me_mfd; /**< just for writing the meta pages */ -#if defined(VL32) && defined(_WIN32) +#if defined(MDB_VL32) && defined(_WIN32) HANDLE me_fmh; /**< File Mapping handle */ #endif /** Failed to update the meta page. Probably an I/O error. */ @@ -1122,18 +1356,19 @@ struct MDB_env { unsigned int me_psize; /**< DB page size, inited from me_os_psize */ unsigned int me_os_psize; /**< OS page size, from #GET_PAGESIZE */ unsigned int me_maxreaders; /**< size of the reader table */ - unsigned int me_numreaders; /**< max numreaders set by this env */ + /** Max #MDB_txninfo.%mti_numreaders of interest to #mdb_env_close() */ + volatile int me_close_readers; MDB_dbi me_numdbs; /**< number of DBs opened */ MDB_dbi me_maxdbs; /**< size of the DB table */ MDB_PID_T me_pid; /**< process ID of this env */ char *me_path; /**< path to the DB files */ char *me_map; /**< the memory map of the data file */ MDB_txninfo *me_txns; /**< the memory map of the lock file or NULL */ - MDB_meta *me_metas[2]; /**< pointers to the two meta pages */ + MDB_meta *me_metas[NUM_METAS]; /**< pointers to the two meta pages */ void *me_pbuf; /**< scratch area for DUPSORT put() */ MDB_txn *me_txn; /**< current write transaction */ MDB_txn *me_txn0; /**< prealloc'd write transaction */ - size_t me_mapsize; /**< size of the data memory map */ + mdb_size_t me_mapsize; /**< size of the data memory map */ off_t me_size; /**< current file size */ pgno_t me_maxpg; /**< me_mapsize / me_psize */ MDB_dbx *me_dbxs; /**< array of static DB info */ @@ -1159,11 +1394,20 @@ struct MDB_env { int me_live_reader; /**< have liveness lock in reader table */ #ifdef _WIN32 int me_pidquery; /**< Used in OpenProcess */ - HANDLE me_rmutex; /* Windows mutexes don't reside in shared mem */ - HANDLE me_wmutex; -#elif defined(MDB_USE_POSIX_SEM) - sem_t *me_rmutex; /* Shared mutexes are not supported */ - sem_t *me_wmutex; +#endif +#ifdef MDB_USE_POSIX_MUTEX /* Posix mutexes reside in shared mem */ +# define me_rmutex me_txns->mti_rmutex /**< Shared reader lock */ +# define me_wmutex me_txns->mti_wmutex /**< Shared writer lock */ +#else + mdb_mutex_t me_rmutex; + mdb_mutex_t me_wmutex; +#endif +#ifdef MDB_VL32 + MDB_ID3L me_rpages; /**< like #mt_rpages, but global to env */ + pthread_mutex_t me_rpmutex; /**< control access to #me_rpages */ +#define MDB_ERPAGE_SIZE 16384 +#define MDB_ERPAGE_MAX (MDB_ERPAGE_SIZE-1) + unsigned int me_rpcheck; #endif void *me_userctx; /**< User-settable context */ MDB_assert_func *me_assert_func; /**< Callback for assertion failures */ @@ -1186,8 +1430,8 @@ typedef struct MDB_ntxn { #define MAX_WRITE (0x80000000U >> (sizeof(ssize_t) == 4)) /** Check \b txn and \b dbi arguments to a function */ -#define TXN_DBI_EXIST(txn, dbi) \ - ((txn) && (dbi) < (txn)->mt_numdbs && ((txn)->mt_dbflags[dbi] & DB_VALID)) +#define TXN_DBI_EXIST(txn, dbi, validity) \ + ((txn) && (dbi)<(txn)->mt_numdbs && ((txn)->mt_dbflags[dbi] & (validity))) /** Check for misused \b dbi handles */ #define TXN_DBI_CHANGED(txn, dbi) \ @@ -1197,7 +1441,20 @@ static int mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp); static int mdb_page_new(MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp); static int mdb_page_touch(MDB_cursor *mc); -static int mdb_page_get(MDB_txn *txn, pgno_t pgno, MDB_page **mp, int *lvl); +#define MDB_END_NAMES {"committed", "empty-commit", "abort", "reset", \ + "reset-tmp", "fail-begin", "fail-beginchild"} +enum { + /* mdb_txn_end operation number, for logging */ + MDB_END_COMMITTED, MDB_END_EMPTY_COMMIT, MDB_END_ABORT, MDB_END_RESET, + MDB_END_RESET_TMP, MDB_END_FAIL_BEGIN, MDB_END_FAIL_BEGINCHILD +}; +#define MDB_END_OPMASK 0x0F /**< mask for #mdb_txn_end() operation number */ +#define MDB_END_UPDATE 0x10 /**< update env state (DBIs) */ +#define MDB_END_FREE 0x20 /**< free txn unless it is #MDB_env.%me_txn0 */ +#define MDB_END_SLOT MDB_NOTLS /**< release any reader slot if #MDB_NOTLS */ +static void mdb_txn_end(MDB_txn *txn, unsigned mode); + +static int mdb_page_get(MDB_cursor *mc, pgno_t pgno, MDB_page **mp, int *lvl); static int mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int modify); #define MDB_PS_MODIFY 1 @@ -1213,9 +1470,9 @@ static int mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno, unsigned int nflags); static int mdb_env_read_header(MDB_env *env, MDB_meta *meta); -static int mdb_env_pick_meta(const MDB_env *env); +static MDB_meta *mdb_env_pick_meta(const MDB_env *env); static int mdb_env_write_meta(MDB_txn *txn); -#if !(defined(_WIN32) || defined(MDB_USE_POSIX_SEM)) /* Drop unused excl arg */ +#ifdef MDB_USE_POSIX_MUTEX /* Drop unused excl arg */ # define mdb_env_close0(env, excl) mdb_env_close1(env) #endif static void mdb_env_close0(MDB_env *env, int excl); @@ -1225,8 +1482,8 @@ static int mdb_node_add(MDB_cursor *mc, indx_t indx, MDB_val *key, MDB_val *data, pgno_t pgno, unsigned int flags); static void mdb_node_del(MDB_cursor *mc, int ksize); static void mdb_node_shrink(MDB_page *mp, indx_t indx); -static int mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst); -static int mdb_node_read(MDB_txn *txn, MDB_node *leaf, MDB_val *data); +static int mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst, int fromleft); +static int mdb_node_read(MDB_cursor *mc, MDB_node *leaf, MDB_val *data); static size_t mdb_leaf_size(MDB_env *env, MDB_val *key, MDB_val *data); static size_t mdb_branch_size(MDB_env *env, MDB_val *key); @@ -1249,9 +1506,11 @@ static int mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data); static void mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx); static void mdb_xcursor_init0(MDB_cursor *mc); static void mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node); +static void mdb_xcursor_init2(MDB_cursor *mc, MDB_xcursor *src_mx, int force); static int mdb_drop0(MDB_cursor *mc, int subs); static void mdb_default_cmp(MDB_txn *txn, MDB_dbi dbi); +static int mdb_reader_check0(MDB_env *env, int rlocked, int *dead); /** @cond */ static MDB_cmp_func mdb_cmp_memn, mdb_cmp_memnr, mdb_cmp_int, mdb_cmp_cint, mdb_cmp_long; @@ -1268,10 +1527,12 @@ static MDB_cmp_func mdb_cmp_memn, mdb_cmp_memnr, mdb_cmp_int, mdb_cmp_cint, mdb_ static SECURITY_DESCRIPTOR mdb_null_sd; static SECURITY_ATTRIBUTES mdb_all_sa; static int mdb_sec_inited; + +static int utf8_to_utf16(const char *src, int srcsize, wchar_t **dst, int *dstsize); #endif /** Return the library version info. */ -char * +char * ESECT mdb_version(int *major, int *minor, int *patch) { if (major) *major = MDB_VERSION_MAJOR; @@ -1286,7 +1547,7 @@ static char *const mdb_errstr[] = { "MDB_NOTFOUND: No matching key/data pair found", "MDB_PAGE_NOTFOUND: Requested page not found", "MDB_CORRUPTED: Located page was wrong type", - "MDB_PANIC: Update of meta page failed", + "MDB_PANIC: Update of meta page failed or environment had fatal error", "MDB_VERSION_MISMATCH: Database environment version mismatch", "MDB_INVALID: File is not an LMDB file", "MDB_MAP_FULL: Environment mapsize limit reached", @@ -1299,7 +1560,7 @@ static char *const mdb_errstr[] = { "MDB_MAP_RESIZED: Database contents grew beyond environment mapsize", "MDB_INCOMPATIBLE: Operation and DB incompatible, or DB flags changed", "MDB_BAD_RSLOT: Invalid reuse of reader locktable slot", - "MDB_BAD_TXN: Transaction cannot recover - it must be aborted", + "MDB_BAD_TXN: Transaction must abort, has a child, or is invalid", "MDB_BAD_VALSIZE: Unsupported size of key/DB name/data, or wrong DUPFIXED size", "MDB_BAD_DBI: The specified DBI handle was closed/changed unexpectedly", }; @@ -1343,7 +1604,7 @@ mdb_strerror(int err) ; } buf[0] = 0; - FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | + FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, err, 0, ptr, sizeof(buf), (va_list *)pad); return ptr; @@ -1355,7 +1616,7 @@ mdb_strerror(int err) /** assert(3) variant in cursor context */ #define mdb_cassert(mc, expr) mdb_assert0((mc)->mc_txn->mt_env, expr, #expr) /** assert(3) variant in transaction context */ -#define mdb_tassert(mc, expr) mdb_assert0((txn)->mt_env, expr, #expr) +#define mdb_tassert(txn, expr) mdb_assert0((txn)->mt_env, expr, #expr) /** assert(3) variant in environment context */ #define mdb_eassert(env, expr) mdb_assert0(env, expr, #expr) @@ -1363,7 +1624,7 @@ mdb_strerror(int err) # define mdb_assert0(env, expr, expr_txt) ((expr) ? (void)0 : \ mdb_assert_fail(env, expr_txt, mdb_func_, __FILE__, __LINE__)) -static void +static void ESECT mdb_assert_fail(MDB_env *env, const char *expr_txt, const char *func, const char *file, int line) { @@ -1445,20 +1706,20 @@ mdb_page_list(MDB_page *mp) case P_LEAF|P_LEAF2: type = "LEAF2 page"; break; case P_LEAF|P_LEAF2|P_SUBP: type = "LEAF2 sub-page"; break; case P_OVERFLOW: - fprintf(stderr, "Overflow page %"Z"u pages %u%s\n", + fprintf(stderr, "Overflow page %"Yu" pages %u%s\n", pgno, mp->mp_pages, state); return; case P_META: - fprintf(stderr, "Meta-page %"Z"u txnid %"Z"u\n", + fprintf(stderr, "Meta-page %"Yu" txnid %"Yu"\n", pgno, ((MDB_meta *)METADATA(mp))->mm_txnid); return; default: - fprintf(stderr, "Bad page %"Z"u flags 0x%u\n", pgno, mp->mp_flags); + fprintf(stderr, "Bad page %"Yu" flags 0x%u\n", pgno, mp->mp_flags); return; } nkeys = NUMKEYS(mp); - fprintf(stderr, "%s %"Z"u numkeys %d%s\n", type, pgno, nkeys, state); + fprintf(stderr, "%s %"Yu" numkeys %d%s\n", type, pgno, nkeys, state); for (i=0; imn_data; nsize = NODESIZE + key.mv_size; if (IS_BRANCH(mp)) { - fprintf(stderr, "key %d: page %"Z"u, %s\n", i, NODEPGNO(node), + fprintf(stderr, "key %d: page %"Yu", %s\n", i, NODEPGNO(node), DKEY(&key)); total += nsize; } else { @@ -1499,7 +1760,7 @@ mdb_cursor_chk(MDB_cursor *mc) MDB_node *node; MDB_page *mp; - if (!mc->mc_snum && !(mc->mc_flags & C_INITIALIZED)) return; + if (!mc->mc_snum || !(mc->mc_flags & C_INITIALIZED)) return; for (i=0; imc_top; i++) { mp = mc->mc_pg[i]; node = NODEPTR(mp, mc->mc_ki[i]); @@ -1508,6 +1769,13 @@ mdb_cursor_chk(MDB_cursor *mc) } if (mc->mc_ki[i] >= NUMKEYS(mc->mc_pg[i])) printf("ack!\n"); + if (mc->mc_xcursor && (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) { + node = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) && + mc->mc_xcursor->mx_cursor.mc_pg[0] != NODEDATA(node)) { + printf("blah!\n"); + } + } } #endif @@ -1561,9 +1829,10 @@ static void mdb_audit(MDB_txn *txn) mdb_tassert(txn, rc == MDB_NOTFOUND); } } - if (freecount + count + 2 /* metapages */ != txn->mt_next_pgno) { - fprintf(stderr, "audit: %lu freecount: %lu count: %lu total: %lu next_pgno: %lu\n", - txn->mt_txnid, freecount, count+2, freecount+count+2, txn->mt_next_pgno); + if (freecount + count + NUM_METAS != txn->mt_next_pgno) { + fprintf(stderr, "audit: %"Yu" freecount: %"Yu" count: %"Yu" total: %"Yu" next_pgno: %"Yu"\n", + txn->mt_txnid, freecount, count+NUM_METAS, + freecount+count+NUM_METAS, txn->mt_next_pgno); } } #endif @@ -1578,8 +1847,8 @@ int mdb_dcmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b) { MDB_cmp_func *dcmp = txn->mt_dbxs[dbi].md_dcmp; -#if UINT_MAX < SIZE_MAX - if (dcmp == mdb_cmp_int && a->mv_size == sizeof(size_t)) +#if UINT_MAX < SIZE_MAX || defined(MDB_VL32) + if (dcmp == mdb_cmp_int && a->mv_size == sizeof(mdb_size_t)) dcmp = mdb_cmp_clong; #endif return dcmp(a, b); @@ -1661,6 +1930,45 @@ mdb_dlist_free(MDB_txn *txn) dl[0].mid = 0; } +#ifdef MDB_VL32 +static void +mdb_page_unref(MDB_txn *txn, MDB_page *mp) +{ + pgno_t pgno; + MDB_ID3L tl = txn->mt_rpages; + unsigned x, rem; + if (mp->mp_flags & (P_SUBP|P_DIRTY)) + return; + rem = mp->mp_pgno & (MDB_RPAGE_CHUNK-1); + pgno = mp->mp_pgno ^ rem; + x = mdb_mid3l_search(tl, pgno); + if (x != tl[0].mid && tl[x+1].mid == mp->mp_pgno) + x++; + if (tl[x].mref) + tl[x].mref--; +} +#define MDB_PAGE_UNREF(txn, mp) mdb_page_unref(txn, mp) + +static void +mdb_cursor_unref(MDB_cursor *mc) +{ + int i; + if (!mc->mc_pg[0] || IS_SUBP(mc->mc_pg[0])) + return; + for (i=0; imc_snum; i++) + mdb_page_unref(mc->mc_txn, mc->mc_pg[i]); + if (mc->mc_ovpg) { + mdb_page_unref(mc->mc_txn, mc->mc_ovpg); + mc->mc_ovpg = 0; + } + mc->mc_snum = mc->mc_top = 0; + mc->mc_pg[0] = NULL; + mc->mc_flags &= ~C_INITIALIZED; +} +#else +#define MDB_PAGE_UNREF(txn, mp) +#endif /* MDB_VL32 */ + /** Loosen or free a single page. * Saves single pages to a list for future reuse * in this same txn. It has been pulled from the freeDB @@ -1702,7 +2010,7 @@ mdb_page_loose(MDB_cursor *mc, MDB_page *mp) } } if (loose) { - DPRINTF(("loosen db %d page %"Z"u", DDBI(mc), + DPRINTF(("loosen db %d page %"Yu"", DDBI(mc), mp->mp_pgno)); NEXT_LOOSE_PAGE(mp) = txn->mt_loose_pgs; txn->mt_loose_pgs = mp; @@ -1729,7 +2037,7 @@ mdb_pages_xkeep(MDB_cursor *mc, unsigned pflags, int all) { enum { Mask = P_SUBP|P_DIRTY|P_LOOSE|P_KEEP }; MDB_txn *txn = mc->mc_txn; - MDB_cursor *m3; + MDB_cursor *m3, *m0 = mc; MDB_xcursor *mx; MDB_page *dp, *mp; MDB_node *leaf; @@ -1772,7 +2080,7 @@ mdb_pages_xkeep(MDB_cursor *mc, unsigned pflags, int all) pgno_t pgno = txn->mt_dbs[i].md_root; if (pgno == P_INVALID) continue; - if ((rc = mdb_page_get(txn, pgno, &dp, &level)) != MDB_SUCCESS) + if ((rc = mdb_page_get(m0, pgno, &dp, &level)) != MDB_SUCCESS) break; if ((dp->mp_flags & Mask) == pflags && level <= 1) dp->mp_flags ^= P_KEEP; @@ -1832,7 +2140,7 @@ mdb_page_spill(MDB_cursor *m0, MDB_val *key, MDB_val *data) /* Estimate how much space this op will take */ i = m0->mc_db->md_depth; /* Named DBs also dirty the main DB */ - if (m0->mc_dbi > MAIN_DBI) + if (m0->mc_dbi >= CORE_DBS) i += txn->mt_dbs[MAIN_DBI].md_depth; /* For puts, roughly factor in the key+data size */ if (key) @@ -1941,7 +2249,7 @@ mdb_page_dirty(MDB_txn *txn, MDB_page *mp) MDB_ID2 mid; int rc, (*insert)(MDB_ID2L, MDB_ID2 *); - if (txn->mt_env->me_flags & MDB_WRITEMAP) { + if (txn->mt_flags & MDB_TXN_WRITEMAP) { insert = mdb_mid2l_append; } else { insert = mdb_mid2l_insert; @@ -1961,6 +2269,8 @@ mdb_page_dirty(MDB_txn *txn, MDB_page *mp) * Do not modify the freedB, just merge freeDB records into me_pghead[] * and move me_pglast to say which records were consumed. Only this * function can create me_pghead and move me_pglast/mt_next_pgno. + * When #MDB_DEVEL & 2, it is not affected by #mdb_freelist_save(): it + * then uses the transaction's original snapshot of the freeDB. * @param[in] mc cursor A cursor handle identifying the transaction and * database for which we are allocating. * @param[in] num the number of pages to allocate. @@ -1998,7 +2308,7 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp) np = txn->mt_loose_pgs; txn->mt_loose_pgs = NEXT_LOOSE_PAGE(np); txn->mt_loose_count--; - DPRINTF(("db %d use loose page %"Z"u", DDBI(mc), + DPRINTF(("db %d use loose page %"Yu"", DDBI(mc), np->mp_pgno)); *mp = np; return MDB_SUCCESS; @@ -2036,6 +2346,14 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp) last = env->me_pglast; oldest = env->me_pgoldest; mdb_cursor_init(&m2, txn, FREE_DBI, NULL); +#if (MDB_DEVEL) & 2 /* "& 2" so MDB_DEVEL=1 won't hide bugs breaking freeDB */ + /* Use original snapshot. TODO: Should need less care in code + * which modifies the database. Maybe we can delete some code? + */ + m2.mc_flags |= C_ORIG_RDONLY; + m2.mc_db = &env->me_metas[(txn->mt_txnid-1) & 1]->mm_dbs[FREE_DBI]; + m2.mc_dbflag = (unsigned char *)""; /* probably unnecessary */ +#endif if (last) { op = MDB_SET_RANGE; key.mv_data = &last; /* will look up last+1 */ @@ -2076,7 +2394,7 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp) } np = m2.mc_pg[m2.mc_top]; leaf = NODEPTR(np, m2.mc_ki[m2.mc_top]); - if ((rc = mdb_node_read(txn, leaf, &data)) != MDB_SUCCESS) + if ((rc = mdb_node_read(&m2, leaf, &data)) != MDB_SUCCESS) return rc; idl = (MDB_ID *) data.mv_data; @@ -2093,10 +2411,10 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp) } env->me_pglast = last; #if (MDB_DEBUG) > 1 - DPRINTF(("IDL read txn %"Z"u root %"Z"u num %u", + DPRINTF(("IDL read txn %"Yu" root %"Yu" num %u", last, txn->mt_dbs[FREE_DBI].md_root, i)); for (j = i; j; j--) - DPRINTF(("IDL %"Z"u", idl[j])); + DPRINTF(("IDL %"Yu"", idl[j])); #endif /* Merge in descending sorted order */ mdb_midl_xmerge(mop, idl); @@ -2111,6 +2429,20 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp) rc = MDB_MAP_FULL; goto fail; } +#ifdef _WIN32 + if (env->me_flags & MDB_WRITEMAP) { + void *p; + p = (MDB_page *)(env->me_map + env->me_psize * pgno); + p = VirtualAlloc(p, env->me_psize * num, MEM_COMMIT, + (env->me_flags & MDB_WRITEMAP) ? PAGE_READWRITE: + PAGE_READONLY); + if (!p) { + DPUTS("VirtualAlloc failed"); + rc = ErrCode(); + goto fail; + } + } +#endif search_done: if (env->me_flags & MDB_WRITEMAP) { @@ -2252,7 +2584,7 @@ mdb_page_touch(MDB_cursor *mc) (rc = mdb_page_alloc(mc, 1, &np))) goto fail; pgno = np->mp_pgno; - DPRINTF(("touched db %d page %"Z"u -> %"Z"u", DDBI(mc), + DPRINTF(("touched db %d page %"Yu" -> %"Yu"", DDBI(mc), mp->mp_pgno, pgno)); mdb_cassert(mc, mp->mp_pgno != pgno); mdb_midl_xappend(txn->mt_free_pgs, mp->mp_pgno); @@ -2312,33 +2644,21 @@ done: } else { for (; m2; m2=m2->mc_next) { if (m2->mc_snum < mc->mc_snum) continue; + if (m2 == mc) continue; if (m2->mc_pg[mc->mc_top] == mp) { m2->mc_pg[mc->mc_top] = np; if ((mc->mc_db->md_flags & MDB_DUPSORT) && IS_LEAF(np) && - m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top]) + (m2->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) { - MDB_node *leaf = NODEPTR(np, mc->mc_ki[mc->mc_top]); - if (!(leaf->mn_flags & F_SUBDATA)) + MDB_node *leaf = NODEPTR(np, m2->mc_ki[mc->mc_top]); + if ((leaf->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); } } } } -#ifdef VL32 - { - MDB_ID2L rl = mc->mc_txn->mt_rpages; - unsigned x = mdb_mid2l_search(rl, mp->mp_pgno); - if (x <= rl[0].mid && rl[x].mid == mp->mp_pgno) { - munmap(mp, mc->mc_txn->mt_env->me_psize); - while (x < rl[0].mid) { - rl[x] = rl[x+1]; - x++; - } - rl[0].mid--; - } - } -#endif + MDB_PAGE_UNREF(mc->mc_txn, mp); return 0; fail: @@ -2347,7 +2667,7 @@ fail: } int -mdb_env_sync(MDB_env *env, int force) +mdb_env_sync0(MDB_env *env, int force, pgno_t numpgs) { int rc = 0; if (env->me_flags & MDB_RDONLY) @@ -2356,7 +2676,7 @@ mdb_env_sync(MDB_env *env, int force) if (env->me_flags & MDB_WRITEMAP) { int flags = ((env->me_flags & MDB_MAPASYNC) && !force) ? MS_ASYNC : MS_SYNC; - if (MDB_MSYNC(env->me_map, env->me_mapsize, flags)) + if (MDB_MSYNC(env->me_map, env->me_psize * numpgs, flags)) rc = ErrCode(); #ifdef _WIN32 else if (flags == MS_SYNC && MDB_FDATASYNC(env->me_fd)) @@ -2376,6 +2696,13 @@ mdb_env_sync(MDB_env *env, int force) return rc; } +int +mdb_env_sync(MDB_env *env, int force) +{ + MDB_meta *m = mdb_env_pick_meta(env); + return mdb_env_sync0(env, force, m->mm_last_pg+1); +} + /** Back up parent txn's cursors, then grab the originals for tracking */ static int mdb_cursor_shadow(MDB_txn *src, MDB_txn *dst) @@ -2397,14 +2724,15 @@ mdb_cursor_shadow(MDB_txn *src, MDB_txn *dst) *bk = *mc; mc->mc_backup = bk; mc->mc_db = &dst->mt_dbs[i]; - /* Kill pointers into src - and dst to reduce abuse: The - * user may not use mc until dst ends. Otherwise we'd... + /* Kill pointers into src to reduce abuse: The + * user may not use mc until dst ends. But we need a valid + * txn pointer here for cursor fixups to keep working. */ - mc->mc_txn = NULL; /* ...set this to dst */ - mc->mc_dbflag = NULL; /* ...and &dst->mt_dbflags[i] */ + mc->mc_txn = dst; + mc->mc_dbflag = &dst->mt_dbflags[i]; if ((mx = mc->mc_xcursor) != NULL) { *(MDB_xcursor *)(bk+1) = *mx; - mx->mx_cursor.mc_txn = NULL; /* ...and dst. */ + mx->mx_cursor.mc_txn = dst; } mc->mc_next = dst->mt_cursors[i]; dst->mt_cursors[i] = mc; @@ -2454,12 +2782,6 @@ mdb_cursors_close(MDB_txn *txn, unsigned merge) } } -#if !(MDB_DEBUG) -#define mdb_txn_reset0(txn, act) mdb_txn_reset0(txn) -#endif -static void -mdb_txn_reset0(MDB_txn *txn, const char *act); - #if !(MDB_PIDLOCK) /* Currently the same as defined(_WIN32) */ enum Pidlock_op { Pidset, Pidcheck @@ -2530,7 +2852,7 @@ mdb_txn_renew0(MDB_txn *txn) if ((flags &= MDB_TXN_RDONLY) != 0) { if (!ti) { - meta = env->me_metas[ mdb_env_pick_meta(env) ]; + meta = mdb_env_pick_meta(env); txn->mt_txnid = meta->mm_txnid; txn->mt_u.reader = NULL; } else { @@ -2542,6 +2864,7 @@ mdb_txn_renew0(MDB_txn *txn) } else { MDB_PID_T pid = env->me_pid; MDB_THR_T tid = pthread_self(); + mdb_mutexref_t rmutex = env->me_rmutex; if (!env->me_live_reader) { rc = mdb_reader_pid(env, Pidset, pid); @@ -2550,24 +2873,32 @@ mdb_txn_renew0(MDB_txn *txn) env->me_live_reader = 1; } - LOCK_MUTEX_R(env); + if (LOCK_MUTEX(rc, env, rmutex)) + return rc; nr = ti->mti_numreaders; for (i=0; imti_readers[i].mr_pid == 0) break; if (i == env->me_maxreaders) { - UNLOCK_MUTEX_R(env); + UNLOCK_MUTEX(rmutex); return MDB_READERS_FULL; } - ti->mti_readers[i].mr_pid = pid; - ti->mti_readers[i].mr_tid = tid; + r = &ti->mti_readers[i]; + /* Claim the reader slot, carefully since other code + * uses the reader table un-mutexed: First reset the + * slot, next publish it in mti_numreaders. After + * that, it is safe for mdb_env_close() to touch it. + * When it will be closed, we can finally claim it. + */ + r->mr_pid = 0; + r->mr_txnid = (txnid_t)-1; + r->mr_tid = tid; if (i == nr) ti->mti_numreaders = ++nr; - /* Save numreaders for un-mutexed mdb_env_close() */ - env->me_numreaders = nr; - UNLOCK_MUTEX_R(env); + env->me_close_readers = nr; + r->mr_pid = pid; + UNLOCK_MUTEX(rmutex); - r = &ti->mti_readers[i]; new_notls = (env->me_flags & MDB_NOTLS); if (!new_notls && (rc=pthread_setspecific(env->me_txkey, r))) { r->mr_pid = 0; @@ -2581,15 +2912,16 @@ mdb_txn_renew0(MDB_txn *txn) txn->mt_u.reader = r; meta = env->me_metas[txn->mt_txnid & 1]; } - txn->mt_dbxs = env->me_dbxs; /* mostly static anyway */ + } else { + /* Not yet touching txn == env->me_txn0, it may be active */ if (ti) { - LOCK_MUTEX_W(env); - + if (LOCK_MUTEX(rc, env, env->me_wmutex)) + return rc; txn->mt_txnid = ti->mti_txnid; meta = env->me_metas[txn->mt_txnid & 1]; } else { - meta = env->me_metas[ mdb_env_pick_meta(env) ]; + meta = mdb_env_pick_meta(env); txn->mt_txnid = meta->mm_txnid; } txn->mt_txnid++; @@ -2611,32 +2943,36 @@ mdb_txn_renew0(MDB_txn *txn) } /* Copy the DB info and flags */ - memcpy(txn->mt_dbs, meta->mm_dbs, 2 * sizeof(MDB_db)); + memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDB_db)); /* Moved to here to avoid a data race in read TXNs */ txn->mt_next_pgno = meta->mm_last_pg+1; +#ifdef MDB_VL32 + txn->mt_last_pgno = txn->mt_next_pgno - 1; +#endif txn->mt_flags = flags; /* Setup db info */ txn->mt_numdbs = env->me_numdbs; - for (i=2; imt_numdbs; i++) { + for (i=CORE_DBS; imt_numdbs; i++) { x = env->me_dbflags[i]; txn->mt_dbs[i].md_flags = x & PERSISTENT_FLAGS; - txn->mt_dbflags[i] = (x & MDB_VALID) ? DB_VALID|DB_STALE : 0; + txn->mt_dbflags[i] = (x & MDB_VALID) ? DB_VALID|DB_USRVALID|DB_STALE : 0; } - txn->mt_dbflags[0] = txn->mt_dbflags[1] = DB_VALID; + txn->mt_dbflags[MAIN_DBI] = DB_VALID|DB_USRVALID; + txn->mt_dbflags[FREE_DBI] = DB_VALID; - if (env->me_maxpg < txn->mt_next_pgno) { - mdb_txn_reset0(txn, "renew0-mapfail"); - if (new_notls) { - txn->mt_u.reader->mr_pid = 0; - txn->mt_u.reader = NULL; - } - return MDB_MAP_RESIZED; + if (env->me_flags & MDB_FATAL_ERROR) { + DPUTS("environment had fatal error, must shutdown!"); + rc = MDB_PANIC; + } else if (env->me_maxpg < txn->mt_next_pgno) { + rc = MDB_MAP_RESIZED; + } else { + return MDB_SUCCESS; } - - return MDB_SUCCESS; + mdb_txn_end(txn, new_notls /*0 or MDB_END_SLOT*/ | MDB_END_FAIL_BEGIN); + return rc; } int @@ -2644,17 +2980,12 @@ mdb_txn_renew(MDB_txn *txn) { int rc; - if (!txn || txn->mt_dbxs) /* A reset txn has mt_dbxs==NULL */ + if (!txn || !F_ISSET(txn->mt_flags, MDB_TXN_RDONLY|MDB_TXN_FINISHED)) return EINVAL; - if (txn->mt_env->me_flags & MDB_FATAL_ERROR) { - DPUTS("environment had fatal error, must shutdown!"); - return MDB_PANIC; - } - rc = mdb_txn_renew0(txn); if (rc == MDB_SUCCESS) { - DPRINTF(("renew txn %"Z"u%c %p on mdbenv %p, root page %"Z"u", + DPRINTF(("renew txn %"Yu"%c %p on mdbenv %p, root page %"Yu"", txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', (void *)txn, (void *)txn->mt_env, txn->mt_dbs[MAIN_DBI].md_root)); } @@ -2666,69 +2997,58 @@ mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret) { MDB_txn *txn; MDB_ntxn *ntxn; - int rc, size, tsize = sizeof(MDB_txn); + int rc, size, tsize; - if (env->me_flags & MDB_FATAL_ERROR) { - DPUTS("environment had fatal error, must shutdown!"); - return MDB_PANIC; - } - if ((env->me_flags & MDB_RDONLY) && !(flags & MDB_RDONLY)) + flags &= MDB_TXN_BEGIN_FLAGS; + flags |= env->me_flags & MDB_WRITEMAP; + + if (env->me_flags & MDB_RDONLY & ~flags) /* write txn in RDONLY env */ return EACCES; + if (parent) { /* Nested transactions: Max 1 child, write txns only, no writemap */ - if (parent->mt_child || - (flags & MDB_RDONLY) || - (parent->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) || - (env->me_flags & MDB_WRITEMAP)) - { + flags |= parent->mt_flags; + if (flags & (MDB_RDONLY|MDB_WRITEMAP|MDB_TXN_BLOCKED)) { return (parent->mt_flags & MDB_TXN_RDONLY) ? EINVAL : MDB_BAD_TXN; } - tsize = sizeof(MDB_ntxn); - } - size = tsize; - if (!(flags & MDB_RDONLY)) { - if (!parent) { - txn = env->me_txn0; /* just reuse preallocated write txn */ - goto ok; - } - /* child txns use own copy of cursors */ - size += env->me_maxdbs * sizeof(MDB_cursor *); + /* Child txns save MDB_pgstate and use own copy of cursors */ + size = env->me_maxdbs * (sizeof(MDB_db)+sizeof(MDB_cursor *)+1); + size += tsize = sizeof(MDB_ntxn); + } else if (flags & MDB_RDONLY) { + size = env->me_maxdbs * (sizeof(MDB_db)+1); + size += tsize = sizeof(MDB_txn); + } else { + /* Reuse preallocated write txn. However, do not touch it until + * mdb_txn_renew0() succeeds, since it currently may be active. + */ + txn = env->me_txn0; + goto renew; } - size += env->me_maxdbs * (sizeof(MDB_db)+1); - if ((txn = calloc(1, size)) == NULL) { DPRINTF(("calloc: %s", strerror(errno))); return ENOMEM; } -#ifdef VL32 +#ifdef MDB_VL32 if (!parent) { - txn->mt_rpages = calloc(MDB_IDL_UM_SIZE, sizeof(MDB_ID2)); + txn->mt_rpages = malloc(MDB_TRPAGE_SIZE * sizeof(MDB_ID3)); if (!txn->mt_rpages) { free(txn); return ENOMEM; } + txn->mt_rpages[0].mid = 0; + txn->mt_rpcheck = MDB_TRPAGE_SIZE/2; } #endif + txn->mt_dbxs = env->me_dbxs; /* static */ txn->mt_dbs = (MDB_db *) ((char *)txn + tsize); - if (flags & MDB_RDONLY) { - txn->mt_flags |= MDB_TXN_RDONLY; - txn->mt_dbflags = (unsigned char *)(txn->mt_dbs + env->me_maxdbs); - txn->mt_dbiseqs = env->me_dbiseqs; - } else { - txn->mt_cursors = (MDB_cursor **)(txn->mt_dbs + env->me_maxdbs); - if (parent) { - txn->mt_dbiseqs = parent->mt_dbiseqs; - txn->mt_dbflags = (unsigned char *)(txn->mt_cursors + env->me_maxdbs); - } else { - txn->mt_dbiseqs = (unsigned int *)(txn->mt_cursors + env->me_maxdbs); - txn->mt_dbflags = (unsigned char *)(txn->mt_dbiseqs + env->me_maxdbs); - } - } + txn->mt_dbflags = (unsigned char *)txn + size - env->me_maxdbs; + txn->mt_flags = flags; txn->mt_env = env; -ok: if (parent) { unsigned int i; + txn->mt_cursors = (MDB_cursor **)(txn->mt_dbs + env->me_maxdbs); + txn->mt_dbiseqs = parent->mt_dbiseqs; txn->mt_u.dirty_list = malloc(sizeof(MDB_ID2)*MDB_IDL_UM_SIZE); if (!txn->mt_u.dirty_list || !(txn->mt_free_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX))) @@ -2742,12 +3062,11 @@ ok: txn->mt_u.dirty_list[0].mid = 0; txn->mt_spill_pgs = NULL; txn->mt_next_pgno = parent->mt_next_pgno; + parent->mt_flags |= MDB_TXN_HAS_CHILD; parent->mt_child = txn; txn->mt_parent = parent; txn->mt_numdbs = parent->mt_numdbs; - txn->mt_flags = parent->mt_flags; - txn->mt_dbxs = parent->mt_dbxs; -#ifdef VL32 +#ifdef MDB_VL32 txn->mt_rpages = parent->mt_rpages; #endif memcpy(txn->mt_dbs, parent->mt_dbs, txn->mt_numdbs * sizeof(MDB_db)); @@ -2768,17 +3087,24 @@ ok: if (!rc) rc = mdb_cursor_shadow(parent, txn); if (rc) - mdb_txn_reset0(txn, "beginchild-fail"); - } else { + mdb_txn_end(txn, MDB_END_FAIL_BEGINCHILD); + } else { /* MDB_RDONLY */ + txn->mt_dbiseqs = env->me_dbiseqs; +renew: rc = mdb_txn_renew0(txn); } if (rc) { - if (txn != env->me_txn0) + if (txn != env->me_txn0) { +#ifdef MDB_VL32 + free(txn->mt_rpages); +#endif free(txn); + } } else { + txn->mt_flags |= flags; /* could not change txn=me_txn0 earlier */ *ret = txn; - DPRINTF(("begin txn %"Z"u%c %p on mdbenv %p, root page %"Z"u", - txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', + DPRINTF(("begin txn %"Yu"%c %p on mdbenv %p, root page %"Yu"", + txn->mt_txnid, (flags & MDB_RDONLY) ? 'r' : 'w', (void *) txn, (void *) env, txn->mt_dbs[MAIN_DBI].md_root)); } @@ -2792,6 +3118,13 @@ mdb_txn_env(MDB_txn *txn) return txn->mt_env; } +mdb_size_t +mdb_txn_id(MDB_txn *txn) +{ + if(!txn) return 0; + return txn->mt_txnid; +} + /** Export or close DBI handles opened in this txn. */ static void mdb_dbis_update(MDB_txn *txn, int keep) @@ -2801,7 +3134,7 @@ mdb_dbis_update(MDB_txn *txn, int keep) MDB_env *env = txn->mt_env; unsigned char *tdbflags = txn->mt_dbflags; - for (i = n; --i >= 2;) { + for (i = n; --i >= CORE_DBS;) { if (tdbflags[i] & DB_NEW) { if (keep) { env->me_dbflags[i] = txn->mt_dbs[i].md_flags | MDB_VALID; @@ -2821,52 +3154,68 @@ mdb_dbis_update(MDB_txn *txn, int keep) env->me_numdbs = n; } -/** Common code for #mdb_txn_reset() and #mdb_txn_abort(). +/** End a transaction, except successful commit of a nested transaction. * May be called twice for readonly txns: First reset it, then abort. - * @param[in] txn the transaction handle to reset - * @param[in] act why the transaction is being reset + * @param[in] txn the transaction handle to end + * @param[in] mode why and how to end the transaction */ static void -mdb_txn_reset0(MDB_txn *txn, const char *act) +mdb_txn_end(MDB_txn *txn, unsigned mode) { MDB_env *env = txn->mt_env; +#if MDB_DEBUG + static const char *const names[] = MDB_END_NAMES; +#endif - /* Close any DBI handles opened in this txn */ - mdb_dbis_update(txn, 0); + /* Export or close DBI handles opened in this txn */ + mdb_dbis_update(txn, mode & MDB_END_UPDATE); - DPRINTF(("%s txn %"Z"u%c %p on mdbenv %p, root page %"Z"u", - act, txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', + DPRINTF(("%s txn %"Yu"%c %p on mdbenv %p, root page %"Yu"", + names[mode & MDB_END_OPMASK], + txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', (void *) txn, (void *)env, txn->mt_dbs[MAIN_DBI].md_root)); if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) { if (txn->mt_u.reader) { txn->mt_u.reader->mr_txnid = (txnid_t)-1; - if (!(env->me_flags & MDB_NOTLS)) + if (!(env->me_flags & MDB_NOTLS)) { txn->mt_u.reader = NULL; /* txn does not own reader */ + } else if (mode & MDB_END_SLOT) { + txn->mt_u.reader->mr_pid = 0; + txn->mt_u.reader = NULL; + } /* else txn owns the slot until it does MDB_END_SLOT */ } - txn->mt_numdbs = 0; /* close nothing if called again */ - txn->mt_dbxs = NULL; /* mark txn as reset */ - } else { + txn->mt_numdbs = 0; /* prevent further DBI activity */ + txn->mt_flags |= MDB_TXN_FINISHED; + + } else if (!F_ISSET(txn->mt_flags, MDB_TXN_FINISHED)) { pgno_t *pghead = env->me_pghead; - mdb_cursors_close(txn, 0); + if (!(mode & MDB_END_UPDATE)) /* !(already closed cursors) */ + mdb_cursors_close(txn, 0); if (!(env->me_flags & MDB_WRITEMAP)) { mdb_dlist_free(txn); } + txn->mt_numdbs = 0; + txn->mt_flags = MDB_TXN_FINISHED; + if (!txn->mt_parent) { - if (mdb_midl_shrink(&txn->mt_free_pgs)) - env->me_free_pgs = txn->mt_free_pgs; + mdb_midl_shrink(&txn->mt_free_pgs); + env->me_free_pgs = txn->mt_free_pgs; /* me_pgstate: */ env->me_pghead = NULL; env->me_pglast = 0; env->me_txn = NULL; + mode = 0; /* txn == env->me_txn0, do not free() it */ + /* The writer mutex was locked in mdb_txn_begin. */ if (env->me_txns) - UNLOCK_MUTEX_W(env); + UNLOCK_MUTEX(env->me_wmutex); } else { txn->mt_parent->mt_child = NULL; + txn->mt_parent->mt_flags &= ~MDB_TXN_HAS_CHILD; env->me_pgstate = ((MDB_ntxn *)txn)->mnt_pgstate; mdb_midl_free(txn->mt_free_pgs); mdb_midl_free(txn->mt_spill_pgs); @@ -2875,22 +3224,33 @@ mdb_txn_reset0(MDB_txn *txn, const char *act) mdb_midl_free(pghead); } -#ifdef VL32 - { - unsigned i, n = txn->mt_rpages[0].mid; +#ifdef MDB_VL32 + if (!txn->mt_parent) { + MDB_ID3L el = env->me_rpages, tl = txn->mt_rpages; + unsigned i, x, n = tl[0].mid; + pthread_mutex_lock(&env->me_rpmutex); for (i = 1; i <= n; i++) { -#ifdef _WIN32 - UnmapViewOfFile(txn->mt_rpages[i].mptr); -#else - MDB_page *mp = txn->mt_rpages[i].mptr; - int size = txn->mt_env->me_psize; - if (IS_OVERFLOW(mp)) size *= mp->mp_pages; - munmap(mp, size); -#endif + if (tl[i].mid & (MDB_RPAGE_CHUNK-1)) { + /* tmp overflow pages that we didn't share in env */ + munmap(tl[i].mptr, tl[i].mcnt * env->me_psize); + } else { + x = mdb_mid3l_search(el, tl[i].mid); + if (tl[i].mptr == el[x].mptr) { + el[x].mref--; + } else { + /* another tmp overflow page */ + munmap(tl[i].mptr, tl[i].mcnt * env->me_psize); + } + } } + pthread_mutex_unlock(&env->me_rpmutex); + tl[0].mid = 0; + if (mode & MDB_END_FREE) + free(tl); } - txn->mt_rpages[0].mid = 0; #endif + if (mode & MDB_END_FREE) + free(txn); } void @@ -2903,7 +3263,7 @@ mdb_txn_reset(MDB_txn *txn) if (!(txn->mt_flags & MDB_TXN_RDONLY)) return; - mdb_txn_reset0(txn, "reset"); + mdb_txn_end(txn, MDB_END_RESET); } void @@ -2915,21 +3275,14 @@ mdb_txn_abort(MDB_txn *txn) if (txn->mt_child) mdb_txn_abort(txn->mt_child); - mdb_txn_reset0(txn, "abort"); - /* Free reader slot tied to this txn (if MDB_NOTLS && writable FS) */ - if ((txn->mt_flags & MDB_TXN_RDONLY) && txn->mt_u.reader) - txn->mt_u.reader->mr_pid = 0; - - if (txn != txn->mt_env->me_txn0) { -#ifdef VL32 - free(txn->mt_rpages); -#endif - free(txn); - } + mdb_txn_end(txn, MDB_END_ABORT|MDB_END_SLOT|MDB_END_FREE); } /** Save the freelist as of this transaction to the freeDB. * This changes the freelist. Keep trying until it stabilizes. + * + * When (MDB_DEVEL) & 2, the changes do not affect #mdb_page_alloc(), + * it then uses the transaction's original snapshot of the freeDB. */ static int mdb_freelist_save(MDB_txn *txn) @@ -3018,10 +3371,10 @@ mdb_freelist_save(MDB_txn *txn) #if (MDB_DEBUG) > 1 { unsigned int i = free_pgs[0]; - DPRINTF(("IDL write txn %"Z"u root %"Z"u num %u", + DPRINTF(("IDL write txn %"Yu" root %"Yu" num %u", txn->mt_txnid, txn->mt_dbs[FREE_DBI].md_root, i)); for (; i; i--) - DPRINTF(("IDL %"Z"u", free_pgs[i])); + DPRINTF(("IDL %"Yu"", free_pgs[i])); } #endif continue; @@ -3132,15 +3485,16 @@ mdb_page_flush(MDB_txn *txn, int keep) MDB_ID2L dl = txn->mt_u.dirty_list; unsigned psize = env->me_psize, j; int i, pagecount = dl[0].mid, rc; - size_t size = 0, pos = 0; + size_t size = 0; + off_t pos = 0; pgno_t pgno = 0; MDB_page *dp = NULL; #ifdef _WIN32 OVERLAPPED ov; #else struct iovec iov[MDB_COMMIT_PAGES]; - ssize_t wpos = 0, wsize = 0, wres; - size_t next_pos = 1; /* impossible pos, so pos != next_pos */ + ssize_t wsize = 0, wres; + off_t wpos = 0, next_pos = 1; /* impossible pos, so pos != next_pos */ int n = 0; #endif @@ -3239,7 +3593,7 @@ retry_seek: wpos = pos; wsize = 0; } - DPRINTF(("committing page %"Z"u", pgno)); + DPRINTF(("committing page %"Yu"", pgno)); next_pos = pos + size; iov[n].iov_len = size; iov[n].iov_base = (char *)dp; @@ -3247,6 +3601,10 @@ retry_seek: n++; #endif /* _WIN32 */ } +#ifdef MDB_VL32 + if (pgno > txn->mt_last_pgno) + txn->mt_last_pgno = pgno; +#endif /* MIPS has cache coherency issues, this is a no-op everywhere else * Note: for any size >= on-chip cache size, entire on-chip cache is @@ -3276,15 +3634,17 @@ int mdb_txn_commit(MDB_txn *txn) { int rc; - unsigned int i; + unsigned int i, end_mode; MDB_env *env; - if (txn == NULL || txn->mt_env == NULL) + if (txn == NULL) return EINVAL; + /* mdb_txn_end() mode for a commit which writes nothing */ + end_mode = MDB_END_EMPTY_COMMIT|MDB_END_UPDATE|MDB_END_SLOT|MDB_END_FREE; + if (txn->mt_child) { rc = mdb_txn_commit(txn->mt_child); - txn->mt_child = NULL; if (rc) goto fail; } @@ -3292,14 +3652,11 @@ mdb_txn_commit(MDB_txn *txn) env = txn->mt_env; if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) { - mdb_dbis_update(txn, 1); - txn->mt_numdbs = 2; /* so txn_abort() doesn't close any new handles */ - mdb_txn_abort(txn); - return MDB_SUCCESS; + goto done; } - if (F_ISSET(txn->mt_flags, MDB_TXN_ERROR)) { - DPUTS("error flag is set, can't commit"); + if (txn->mt_flags & (MDB_TXN_FINISHED|MDB_TXN_ERROR)) { + DPUTS("txn has failed/finished, can't commit"); if (txn->mt_parent) txn->mt_parent->mt_flags |= MDB_TXN_ERROR; rc = MDB_BAD_TXN; @@ -3331,9 +3688,9 @@ mdb_txn_commit(MDB_txn *txn) /* Update parent's DB table. */ memcpy(parent->mt_dbs, txn->mt_dbs, txn->mt_numdbs * sizeof(MDB_db)); parent->mt_numdbs = txn->mt_numdbs; - parent->mt_dbflags[0] = txn->mt_dbflags[0]; - parent->mt_dbflags[1] = txn->mt_dbflags[1]; - for (i=2; imt_numdbs; i++) { + parent->mt_dbflags[FREE_DBI] = txn->mt_dbflags[FREE_DBI]; + parent->mt_dbflags[MAIN_DBI] = txn->mt_dbflags[MAIN_DBI]; + for (i=CORE_DBS; imt_numdbs; i++) { /* preserve parent's DB_NEW status */ x = parent->mt_dbflags[i] & DB_NEW; parent->mt_dbflags[i] = txn->mt_dbflags[i] | x; @@ -3362,6 +3719,25 @@ mdb_txn_commit(MDB_txn *txn) pspill[0] = y; } + /* Remove anything in our spill list from parent's dirty list */ + if (txn->mt_spill_pgs && txn->mt_spill_pgs[0]) { + for (i=1; i<=txn->mt_spill_pgs[0]; i++) { + MDB_ID pn = txn->mt_spill_pgs[i]; + if (pn & 1) + continue; /* deleted spillpg */ + pn >>= 1; + y = mdb_mid2l_search(dst, pn); + if (y <= dst[0].mid && dst[y].mid == pn) { + free(dst[y].mptr); + while (y < dst[0].mid) { + dst[y] = dst[y+1]; + y++; + } + dst[0].mid--; + } + } + } + /* Find len = length of merging our dirty list with parent's */ x = dst[0].mid; dst[0].mid = 0; /* simplify loops */ @@ -3407,7 +3783,7 @@ mdb_txn_commit(MDB_txn *txn) } /* Append our loose page list to parent's */ - for (lp = &parent->mt_loose_pgs; *lp; lp = &NEXT_LOOSE_PAGE(lp)) + for (lp = &parent->mt_loose_pgs; *lp; lp = &NEXT_LOOSE_PAGE(*lp)) ; *lp = txn->mt_loose_pgs; parent->mt_loose_count += txn->mt_loose_count; @@ -3430,25 +3806,26 @@ mdb_txn_commit(MDB_txn *txn) !(txn->mt_flags & (MDB_TXN_DIRTY|MDB_TXN_SPILLS))) goto done; - DPRINTF(("committing txn %"Z"u %p on mdbenv %p, root page %"Z"u", + DPRINTF(("committing txn %"Yu" %p on mdbenv %p, root page %"Yu"", txn->mt_txnid, (void*)txn, (void*)env, txn->mt_dbs[MAIN_DBI].md_root)); /* Update DB root pointers */ - if (txn->mt_numdbs > 2) { + if (txn->mt_numdbs > CORE_DBS) { MDB_cursor mc; MDB_dbi i; MDB_val data; data.mv_size = sizeof(MDB_db); mdb_cursor_init(&mc, txn, MAIN_DBI, NULL); - for (i = 2; i < txn->mt_numdbs; i++) { + for (i = CORE_DBS; i < txn->mt_numdbs; i++) { if (txn->mt_dbflags[i] & DB_DIRTY) { if (TXN_DBI_CHANGED(txn, i)) { rc = MDB_BAD_DBI; goto fail; } data.mv_data = &txn->mt_dbs[i]; - rc = mdb_cursor_put(&mc, &txn->mt_dbxs[i].md_name, &data, 0); + rc = mdb_cursor_put(&mc, &txn->mt_dbxs[i].md_name, &data, + F_SUBDATA); if (rc) goto fail; } @@ -3461,32 +3838,23 @@ mdb_txn_commit(MDB_txn *txn) mdb_midl_free(env->me_pghead); env->me_pghead = NULL; - if (mdb_midl_shrink(&txn->mt_free_pgs)) - env->me_free_pgs = txn->mt_free_pgs; + mdb_midl_shrink(&txn->mt_free_pgs); #if (MDB_DEBUG) > 2 mdb_audit(txn); #endif - if ((rc = mdb_page_flush(txn, 0)) || - (rc = mdb_env_sync(env, 0)) || - (rc = mdb_env_write_meta(txn))) + if ((rc = mdb_page_flush(txn, 0))) goto fail; - - /* Free P_LOOSE pages left behind in dirty_list */ - if (!(env->me_flags & MDB_WRITEMAP)) - mdb_dlist_free(txn); + if (!F_ISSET(txn->mt_flags, MDB_TXN_NOSYNC) && + (rc = mdb_env_sync0(env, 0, txn->mt_next_pgno))) + goto fail; + if ((rc = mdb_env_write_meta(txn))) + goto fail; + end_mode = MDB_END_COMMITTED|MDB_END_UPDATE; done: - env->me_pglast = 0; - env->me_txn = NULL; - mdb_dbis_update(txn, 1); - - if (env->me_txns) - UNLOCK_MUTEX_W(env); - if (txn != env->me_txn0) - free(txn); - + mdb_txn_end(txn, end_mode); return MDB_SUCCESS; fail: @@ -3513,7 +3881,7 @@ mdb_env_read_header(MDB_env *env, MDB_meta *meta) * Read both meta pages so we can use the latest one. */ - for (i=off=0; i<2; i++, off = meta->mm_psize) { + for (i=off=0; imm_psize) { #ifdef _WIN32 DWORD len; OVERLAPPED ov; @@ -3536,7 +3904,7 @@ mdb_env_read_header(MDB_env *env, MDB_meta *meta) p = (MDB_page *)&pbuf; if (!F_ISSET(p->mp_flags, P_META)) { - DPRINTF(("page %"Z"u not a meta page", p->mp_pgno)); + DPRINTF(("page %"Yu" not a meta page", p->mp_pgno)); return MDB_INVALID; } @@ -3558,6 +3926,7 @@ mdb_env_read_header(MDB_env *env, MDB_meta *meta) return 0; } +/** Fill in most of the zeroed #MDB_meta for an empty database environment */ static void ESECT mdb_env_init_meta0(MDB_env *env, MDB_meta *meta) { @@ -3565,16 +3934,16 @@ mdb_env_init_meta0(MDB_env *env, MDB_meta *meta) meta->mm_version = MDB_DATA_VERSION; meta->mm_mapsize = env->me_mapsize; meta->mm_psize = env->me_psize; - meta->mm_last_pg = 1; + meta->mm_last_pg = NUM_METAS-1; meta->mm_flags = env->me_flags & 0xffff; - meta->mm_flags |= MDB_INTEGERKEY; - meta->mm_dbs[0].md_root = P_INVALID; - meta->mm_dbs[1].md_root = P_INVALID; + meta->mm_flags |= MDB_INTEGERKEY; /* this is mm_dbs[FREE_DBI].md_flags */ + meta->mm_dbs[FREE_DBI].md_root = P_INVALID; + meta->mm_dbs[MAIN_DBI].md_root = P_INVALID; } /** Write the environment parameters of a freshly created DB environment. * @param[in] env the environment handle - * @param[out] meta address of where to store the meta information + * @param[in] meta the #MDB_meta to write * @return 0 on success, non-zero on failure. */ static int ESECT @@ -3602,9 +3971,9 @@ mdb_env_init_meta(MDB_env *env, MDB_meta *meta) psize = env->me_psize; - mdb_env_init_meta0(env, meta); - - p = calloc(2, psize); + p = calloc(NUM_METAS, psize); + if (!p) + return ENOMEM; p->mp_pgno = 0; p->mp_flags = P_META; *(MDB_meta *)METADATA(p) = *meta; @@ -3614,10 +3983,10 @@ mdb_env_init_meta(MDB_env *env, MDB_meta *meta) q->mp_flags = P_META; *(MDB_meta *)METADATA(q) = *meta; - DO_PWRITE(rc, env->me_fd, p, psize * 2, len, 0); + DO_PWRITE(rc, env->me_fd, p, psize * NUM_METAS, len, 0); if (!rc) rc = ErrCode(); - else if ((unsigned) len == psize * 2) + else if ((unsigned) len == psize * NUM_METAS) rc = MDB_SUCCESS; else rc = ENOSPC; @@ -3634,7 +4003,8 @@ mdb_env_write_meta(MDB_txn *txn) { MDB_env *env; MDB_meta meta, metab, *mp; - size_t mapsize; + unsigned flags; + mdb_size_t mapsize; off_t off; int rc, len, toggle; char *ptr; @@ -3646,34 +4016,37 @@ mdb_env_write_meta(MDB_txn *txn) #endif toggle = txn->mt_txnid & 1; - DPRINTF(("writing meta page %d for root page %"Z"u", + DPRINTF(("writing meta page %d for root page %"Yu"", toggle, txn->mt_dbs[MAIN_DBI].md_root)); env = txn->mt_env; + flags = txn->mt_flags | env->me_flags; mp = env->me_metas[toggle]; mapsize = env->me_metas[toggle ^ 1]->mm_mapsize; /* Persist any increases of mapsize config */ if (mapsize < env->me_mapsize) mapsize = env->me_mapsize; - if (env->me_flags & MDB_WRITEMAP) { + if (flags & MDB_WRITEMAP) { mp->mm_mapsize = mapsize; - mp->mm_dbs[0] = txn->mt_dbs[0]; - mp->mm_dbs[1] = txn->mt_dbs[1]; + mp->mm_dbs[FREE_DBI] = txn->mt_dbs[FREE_DBI]; + mp->mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI]; mp->mm_last_pg = txn->mt_next_pgno - 1; +#if (__GNUC__ * 100 + __GNUC_MINOR__ >= 404) && /* TODO: portability */ \ + !(defined(__i386__) || defined(__x86_64__)) + /* LY: issue a memory barrier, if not x86. ITS#7969 */ + __sync_synchronize(); +#endif mp->mm_txnid = txn->mt_txnid; - if (!(env->me_flags & (MDB_NOMETASYNC|MDB_NOSYNC))) { + if (!(flags & (MDB_NOMETASYNC|MDB_NOSYNC))) { unsigned meta_size = env->me_psize; rc = (env->me_flags & MDB_MAPASYNC) ? MS_ASYNC : MS_SYNC; - ptr = env->me_map; - if (toggle) { + ptr = (char *)mp - PAGEHDRSZ; #ifndef _WIN32 /* POSIX msync() requires ptr = start of OS page */ - if (meta_size < env->me_os_psize) - meta_size += meta_size; - else + r2 = (ptr - env->me_map) & (env->me_os_psize - 1); + ptr -= r2; + meta_size += r2; #endif - ptr += meta_size; - } if (MDB_MSYNC(ptr, meta_size, rc)) { rc = ErrCode(); goto fail; @@ -3681,26 +4054,22 @@ mdb_env_write_meta(MDB_txn *txn) } goto done; } - metab.mm_txnid = env->me_metas[toggle]->mm_txnid; - metab.mm_last_pg = env->me_metas[toggle]->mm_last_pg; + metab.mm_txnid = mp->mm_txnid; + metab.mm_last_pg = mp->mm_last_pg; meta.mm_mapsize = mapsize; - meta.mm_dbs[0] = txn->mt_dbs[0]; - meta.mm_dbs[1] = txn->mt_dbs[1]; + meta.mm_dbs[FREE_DBI] = txn->mt_dbs[FREE_DBI]; + meta.mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI]; meta.mm_last_pg = txn->mt_next_pgno - 1; meta.mm_txnid = txn->mt_txnid; off = offsetof(MDB_meta, mm_mapsize); ptr = (char *)&meta + off; len = sizeof(MDB_meta) - off; - if (toggle) - off += env->me_psize; - off += PAGEHDRSZ; + off += (char *)mp - env->me_map; /* Write to the SYNC fd */ - mfd = env->me_flags & (MDB_NOSYNC|MDB_NOMETASYNC) ? - env->me_fd : env->me_mfd; -retry_write: + mfd = (flags & (MDB_NOSYNC|MDB_NOMETASYNC)) ? env->me_fd : env->me_mfd; #ifdef _WIN32 { memset(&ov, 0, sizeof(ov)); @@ -3709,12 +4078,15 @@ retry_write: rc = -1; } #else +retry_write: rc = pwrite(mfd, ptr, len, off); #endif if (rc != len) { rc = rc < 0 ? ErrCode() : EIO; +#ifndef _WIN32 if (rc == EINTR) goto retry_write; +#endif DPUTS("write failed, disk error?"); /* On a failure, the pagecache still contains the new data. * Write some old data back, to prevent it from being used. @@ -3751,12 +4123,13 @@ done: /** Check both meta pages to see which one is newer. * @param[in] env the environment handle - * @return meta toggle (0 or 1). + * @return newest #MDB_meta. */ -static int +static MDB_meta * mdb_env_pick_meta(const MDB_env *env) { - return (env->me_metas[0]->mm_txnid < env->me_metas[1]->mm_txnid); + MDB_meta *const *metas = env->me_metas; + return metas[ metas[0]->mm_txnid < metas[1]->mm_txnid ]; } int ESECT @@ -3769,13 +4142,16 @@ mdb_env_create(MDB_env **env) return ENOMEM; e->me_maxreaders = DEFAULT_READERS; - e->me_maxdbs = e->me_numdbs = 2; + e->me_maxdbs = e->me_numdbs = CORE_DBS; e->me_fd = INVALID_HANDLE_VALUE; e->me_lfd = INVALID_HANDLE_VALUE; e->me_mfd = INVALID_HANDLE_VALUE; #ifdef MDB_USE_POSIX_SEM e->me_rmutex = SEM_FAILED; e->me_wmutex = SEM_FAILED; +#elif defined MDB_USE_SYSV_SEM + e->me_rmutex->semid = -1; + e->me_wmutex->semid = -1; #endif e->me_pid = getpid(); GET_PAGESIZE(e->me_os_psize); @@ -3791,53 +4167,46 @@ mdb_env_map(MDB_env *env, void *addr) unsigned int flags = env->me_flags; #ifdef _WIN32 int rc; + int access = SECTION_MAP_READ; HANDLE mh; - LONG sizelo, sizehi; - size_t msize; + void *map; + SIZE_T msize; + ULONG pageprot = PAGE_READONLY, secprot, alloctype; + if (flags & MDB_WRITEMAP) { + access |= SECTION_MAP_WRITE; + pageprot = PAGE_READWRITE; + } if (flags & MDB_RDONLY) { - /* Don't set explicit map size, use whatever exists */ + secprot = PAGE_READONLY; msize = 0; - sizelo = 0; - sizehi = 0; + alloctype = 0; } else { + secprot = PAGE_READWRITE; msize = env->me_mapsize; - sizelo = msize & 0xffffffff; - sizehi = msize >> 16 >> 16; /* only needed on Win64 */ - - /* Windows won't create mappings for zero length files. - * and won't map more than the file size. - * Just set the maxsize right now. - */ - if (SetFilePointer(env->me_fd, sizelo, &sizehi, 0) != (DWORD)sizelo - || !SetEndOfFile(env->me_fd) - || SetFilePointer(env->me_fd, 0, NULL, 0) != 0) - return ErrCode(); + alloctype = MEM_RESERVE; } - mh = CreateFileMapping(env->me_fd, NULL, flags & MDB_WRITEMAP ? - PAGE_READWRITE : PAGE_READONLY, - sizehi, sizelo, NULL); - if (!mh) - return ErrCode(); -#ifdef VL32 - msize = 2 * env->me_psize; -#endif - env->me_map = MapViewOfFileEx(mh, flags & MDB_WRITEMAP ? - FILE_MAP_WRITE : FILE_MAP_READ, - 0, 0, msize, addr); - rc = env->me_map ? 0 : ErrCode(); -#ifdef VL32 + rc = NtCreateSection(&mh, access, NULL, NULL, secprot, SEC_RESERVE, env->me_fd); + if (rc) + return rc; + map = addr; +#ifdef MDB_VL32 + msize = NUM_METAS * env->me_psize; +#endif + rc = NtMapViewOfSection(mh, GetCurrentProcess(), &map, 0, 0, NULL, &msize, ViewUnmap, alloctype, pageprot); +#ifdef MDB_VL32 env->me_fmh = mh; #else - CloseHandle(mh); + NtClose(mh); #endif if (rc) return rc; + env->me_map = map; #else -#ifdef VL32 +#ifdef MDB_VL32 (void) flags; - env->me_map = mmap(addr, 2 * env->me_psize, PROT_READ, MAP_SHARED, + env->me_map = mmap(addr, NUM_METAS * env->me_psize, PROT_READ, MAP_SHARED, env->me_fd, 0); if (env->me_map == MAP_FAILED) { env->me_map = NULL; @@ -3886,32 +4255,39 @@ mdb_env_map(MDB_env *env, void *addr) } int ESECT -mdb_env_set_mapsize(MDB_env *env, size_t size) +mdb_env_set_mapsize(MDB_env *env, mdb_size_t size) { /* If env is already open, caller is responsible for making * sure there are no active txns. */ if (env->me_map) { - int rc; + MDB_meta *meta; +#ifndef MDB_VL32 void *old; + int rc; +#endif if (env->me_txn) return EINVAL; + meta = mdb_env_pick_meta(env); if (!size) - size = env->me_metas[mdb_env_pick_meta(env)]->mm_mapsize; - else if (size < env->me_mapsize) { - /* If the configured size is smaller, make sure it's - * still big enough. Silently round up to minimum if not. - */ - size_t minsize = (env->me_metas[mdb_env_pick_meta(env)]->mm_last_pg + 1) * env->me_psize; + size = meta->mm_mapsize; + { + /* Silently round up to minimum if the size is too small */ + size_t minsize = (meta->mm_last_pg + 1) * env->me_psize; if (size < minsize) size = minsize; } +#ifndef MDB_VL32 + /* For MDB_VL32 this bit is a noop since we dynamically remap + * chunks of the DB anyway. + */ munmap(env->me_map, env->me_mapsize); env->me_mapsize = size; old = (env->me_flags & MDB_FIXEDMAP) ? env->me_map : NULL; rc = mdb_env_map(env, old); if (rc) return rc; +#endif /* !MDB_VL32 */ } env->me_mapsize = size; if (env->me_psize) @@ -3924,7 +4300,7 @@ mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs) { if (env->me_map) return EINVAL; - env->me_maxdbs = dbs + 2; /* Named databases + main and free DB */ + env->me_maxdbs = dbs + CORE_DBS; return MDB_SUCCESS; } @@ -3947,7 +4323,7 @@ mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers) } static int ESECT -mdb_fsize(HANDLE fd, size_t *size) +mdb_fsize(HANDLE fd, mdb_size_t *size) { #ifdef _WIN32 LARGE_INTEGER fsize; @@ -3989,6 +4365,7 @@ mdb_env_open2(MDB_env *env) else env->me_pidquery = PROCESS_QUERY_INFORMATION; #endif /* _WIN32 */ + #ifdef BROKEN_FDATASYNC /* ext3/ext4 fdatasync is broken on some older Linux kernels. * https://lkml.org/lkml/2012/9/3/83 @@ -4037,8 +4414,6 @@ mdb_env_open2(MDB_env *env) } #endif - memset(&meta, 0, sizeof(meta)); - if ((i = mdb_env_read_header(env, &meta)) != 0) { if (i != ENOENT) return i; @@ -4047,24 +4422,52 @@ mdb_env_open2(MDB_env *env) env->me_psize = env->me_os_psize; if (env->me_psize > MAX_PAGESIZE) env->me_psize = MAX_PAGESIZE; + memset(&meta, 0, sizeof(meta)); + mdb_env_init_meta0(env, &meta); + meta.mm_mapsize = DEFAULT_MAPSIZE; } else { env->me_psize = meta.mm_psize; } /* Was a mapsize configured? */ if (!env->me_mapsize) { - /* If this is a new environment, take the default, - * else use the size recorded in the existing env. - */ - env->me_mapsize = newenv ? DEFAULT_MAPSIZE : meta.mm_mapsize; - } else if (env->me_mapsize < meta.mm_mapsize) { - /* If the configured size is smaller, make sure it's - * still big enough. Silently round up to minimum if not. + env->me_mapsize = meta.mm_mapsize; + } + { + /* Make sure mapsize >= committed data size. Even when using + * mm_mapsize, which could be broken in old files (ITS#7789). */ - size_t minsize = (meta.mm_last_pg + 1) * meta.mm_psize; + mdb_size_t minsize = (meta.mm_last_pg + 1) * meta.mm_psize; if (env->me_mapsize < minsize) env->me_mapsize = minsize; } + meta.mm_mapsize = env->me_mapsize; + + if (newenv && !(flags & MDB_FIXEDMAP)) { + /* mdb_env_map() may grow the datafile. Write the metapages + * first, so the file will be valid if initialization fails. + * Except with FIXEDMAP, since we do not yet know mm_address. + * We could fill in mm_address later, but then a different + * program might end up doing that - one with a memory layout + * and map address which does not suit the main program. + */ + rc = mdb_env_init_meta(env, &meta); + if (rc) + return rc; + newenv = 0; + } +#ifdef _WIN32 + /* For FIXEDMAP, make sure the file is non-empty before we attempt to map it */ + if (newenv) { + char dummy = 0; + DWORD len; + rc = WriteFile(env->me_fd, &dummy, 1, &len, NULL); + if (!rc) { + rc = ErrCode(); + return rc; + } + } +#endif rc = mdb_env_map(env, (flags & MDB_FIXEDMAP) ? meta.mm_address : NULL); if (rc) @@ -4089,18 +4492,18 @@ mdb_env_open2(MDB_env *env) #if MDB_DEBUG { - int toggle = mdb_env_pick_meta(env); - MDB_db *db = &env->me_metas[toggle]->mm_dbs[MAIN_DBI]; + MDB_meta *meta = mdb_env_pick_meta(env); + MDB_db *db = &meta->mm_dbs[MAIN_DBI]; DPRINTF(("opened database version %u, pagesize %u", - env->me_metas[0]->mm_version, env->me_psize)); - DPRINTF(("using meta page %d", toggle)); + meta->mm_version, env->me_psize)); + DPRINTF(("using meta page %d", (int) (meta->mm_txnid & 1))); DPRINTF(("depth: %u", db->md_depth)); - DPRINTF(("entries: %"Z"u", db->md_entries)); - DPRINTF(("branch pages: %"Z"u", db->md_branch_pages)); - DPRINTF(("leaf pages: %"Z"u", db->md_leaf_pages)); - DPRINTF(("overflow pages: %"Z"u", db->md_overflow_pages)); - DPRINTF(("root: %"Z"u", db->md_root)); + DPRINTF(("entries: %"Yu"", db->md_entries)); + DPRINTF(("branch pages: %"Yu"", db->md_branch_pages)); + DPRINTF(("leaf pages: %"Yu"", db->md_leaf_pages)); + DPRINTF(("overflow pages: %"Yu"", db->md_overflow_pages)); + DPRINTF(("root: %"Yu"", db->md_root)); } #endif @@ -4181,9 +4584,10 @@ PIMAGE_TLS_CALLBACK mdb_tls_cbp = mdb_tls_callback; static int ESECT mdb_env_share_locks(MDB_env *env, int *excl) { - int rc = 0, toggle = mdb_env_pick_meta(env); + int rc = 0; + MDB_meta *meta = mdb_env_pick_meta(env); - env->me_txns->mti_txnid = env->me_metas[toggle]->mm_txnid; + env->me_txns->mti_txnid = meta->mm_txnid; #ifdef _WIN32 { @@ -4248,8 +4652,8 @@ mdb_env_excl_lock(MDB_env *env, int *excl) if (!rc) { *excl = 1; } else -# ifdef MDB_USE_POSIX_SEM - if (*excl < 0) /* always true when !MDB_USE_POSIX_SEM */ +# ifndef MDB_USE_POSIX_MUTEX + if (*excl < 0) /* always true when MDB_USE_POSIX_MUTEX */ # endif { lock_info.l_type = F_RDLCK; @@ -4332,7 +4736,7 @@ mdb_hash_val(MDB_val *val, mdb_hash_t hval) */ static const char mdb_a85[]= "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~"; -static void +static void ESECT mdb_pack85(unsigned long l, char *out) { int i; @@ -4343,7 +4747,7 @@ mdb_pack85(unsigned long l, char *out) } } -static void +static void ESECT mdb_hash_enc(MDB_val *val, char *encbuf) { mdb_hash_t h = mdb_hash_val(val, MDB_HASH_INIT); @@ -4374,14 +4778,23 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) int fdflags; # define MDB_CLOEXEC 0 #endif +#endif +#ifdef MDB_USE_SYSV_SEM + int semid; + union semun semu; #endif int rc; off_t size, rsize; #ifdef _WIN32 - env->me_lfd = CreateFile(lpath, GENERIC_READ|GENERIC_WRITE, + wchar_t *wlpath; + rc = utf8_to_utf16(lpath, -1, &wlpath, NULL); + if (rc) + return rc; + env->me_lfd = CreateFileW(wlpath, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); + free(wlpath); #else env->me_lfd = open(lpath, O_RDWR|O_CREAT|MDB_CLOEXEC, mode); #endif @@ -4483,9 +4896,9 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) mdb_hash_enc(&val, encbuf); sprintf(env->me_txns->mti_rmname, "Global\\MDBr%s", encbuf); sprintf(env->me_txns->mti_wmname, "Global\\MDBw%s", encbuf); - env->me_rmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_rmname); + env->me_rmutex = CreateMutexA(&mdb_all_sa, FALSE, env->me_txns->mti_rmname); if (!env->me_rmutex) goto fail_errno; - env->me_wmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_wmname); + env->me_wmutex = CreateMutexA(&mdb_all_sa, FALSE, env->me_txns->mti_wmname); if (!env->me_wmutex) goto fail_errno; #elif defined(MDB_USE_POSIX_SEM) struct stat stbuf; @@ -4521,16 +4934,31 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) env->me_wmutex = sem_open(env->me_txns->mti_wmname, O_CREAT|O_EXCL, mode, 1); if (env->me_wmutex == SEM_FAILED) goto fail_errno; -#else /* MDB_USE_POSIX_SEM */ +#elif defined(MDB_USE_SYSV_SEM) + unsigned short vals[2] = {1, 1}; + key_t key = ftok(lpath, 'M'); + if (key == -1) + goto fail_errno; + semid = semget(key, 2, (mode & 0777) | IPC_CREAT); + if (semid < 0) + goto fail_errno; + semu.array = vals; + if (semctl(semid, 0, SETALL, semu) < 0) + goto fail_errno; + env->me_txns->mti_semid = semid; +#else /* MDB_USE_POSIX_MUTEX: */ pthread_mutexattr_t mattr; if ((rc = pthread_mutexattr_init(&mattr)) || (rc = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED)) - || (rc = pthread_mutex_init(&env->me_txns->mti_mutex, &mattr)) - || (rc = pthread_mutex_init(&env->me_txns->mti_wmutex, &mattr))) +#ifdef MDB_ROBUST_SUPPORTED + || (rc = pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST)) +#endif + || (rc = pthread_mutex_init(env->me_txns->mti_rmutex, &mattr)) + || (rc = pthread_mutex_init(env->me_txns->mti_wmutex, &mattr))) goto fail; pthread_mutexattr_destroy(&mattr); -#endif /* _WIN32 || MDB_USE_POSIX_SEM */ +#endif /* _WIN32 || ... */ env->me_txns->mti_magic = MDB_MAGIC; env->me_txns->mti_format = MDB_LOCK_FORMAT; @@ -4538,6 +4966,9 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) env->me_txns->mti_numreaders = 0; } else { +#ifdef MDB_USE_SYSV_SEM + struct semid_ds buf; +#endif if (env->me_txns->mti_magic != MDB_MAGIC) { DPUTS("lock region has invalid magic"); rc = MDB_INVALID; @@ -4554,17 +4985,42 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) goto fail; } #ifdef _WIN32 - env->me_rmutex = OpenMutex(SYNCHRONIZE, FALSE, env->me_txns->mti_rmname); + env->me_rmutex = OpenMutexA(SYNCHRONIZE, FALSE, env->me_txns->mti_rmname); if (!env->me_rmutex) goto fail_errno; - env->me_wmutex = OpenMutex(SYNCHRONIZE, FALSE, env->me_txns->mti_wmname); + env->me_wmutex = OpenMutexA(SYNCHRONIZE, FALSE, env->me_txns->mti_wmname); if (!env->me_wmutex) goto fail_errno; #elif defined(MDB_USE_POSIX_SEM) env->me_rmutex = sem_open(env->me_txns->mti_rmname, 0); if (env->me_rmutex == SEM_FAILED) goto fail_errno; env->me_wmutex = sem_open(env->me_txns->mti_wmname, 0); if (env->me_wmutex == SEM_FAILED) goto fail_errno; +#elif defined(MDB_USE_SYSV_SEM) + semid = env->me_txns->mti_semid; + semu.buf = &buf; + /* check for read access */ + if (semctl(semid, 0, IPC_STAT, semu) < 0) + goto fail_errno; + /* check for write access */ + if (semctl(semid, 0, IPC_SET, semu) < 0) + goto fail_errno; #endif } +#ifdef MDB_USE_SYSV_SEM + env->me_rmutex->semid = semid; + env->me_wmutex->semid = semid; + env->me_rmutex->semnum = 0; + env->me_wmutex->semnum = 1; + env->me_rmutex->locked = &env->me_txns->mti_rlocked; + env->me_wmutex->locked = &env->me_txns->mti_wlocked; +#endif +#ifdef MDB_VL32 +#ifdef _WIN32 + env->me_rpmutex = CreateMutex(NULL, FALSE, NULL); +#else + pthread_mutex_init(&env->me_rpmutex, NULL); +#endif +#endif + return MDB_SUCCESS; fail_errno: @@ -4584,8 +5040,8 @@ fail: * environment and re-opening it with the new flags. */ #define CHANGEABLE (MDB_NOSYNC|MDB_NOMETASYNC|MDB_MAPASYNC|MDB_NOMEMINIT) -#define CHANGELESS (MDB_FIXEDMAP|MDB_NOSUBDIR|MDB_RDONLY|MDB_WRITEMAP| \ - MDB_NOTLS|MDB_NOLOCK|MDB_NORDAHEAD) +#define CHANGELESS (MDB_FIXEDMAP|MDB_NOSUBDIR|MDB_RDONLY| \ + MDB_WRITEMAP|MDB_NOTLS|MDB_NOLOCK|MDB_NORDAHEAD) #if VALID_FLAGS & PERSISTENT_FLAGS & (CHANGEABLE|CHANGELESS) # error "Persistent DB flags & env flags overlap, but both go in mm_flags" @@ -4596,11 +5052,14 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode { int oflags, rc, len, excl = -1; char *lpath, *dpath; +#ifdef _WIN32 + wchar_t *wpath; +#endif if (env->me_fd!=INVALID_HANDLE_VALUE || (flags & ~(CHANGEABLE|CHANGELESS))) return EINVAL; -#ifdef VL32 +#ifdef MDB_VL32 if (flags & MDB_WRITEMAP) { /* silently ignore WRITEMAP in 32 bit mode */ flags ^= MDB_WRITEMAP; @@ -4640,6 +5099,17 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode (env->me_dirty_list = calloc(MDB_IDL_UM_SIZE, sizeof(MDB_ID2))))) rc = ENOMEM; } +#ifdef MDB_VL32 + if (!rc) { + env->me_rpages = malloc(MDB_ERPAGE_SIZE * sizeof(MDB_ID3)); + if (!env->me_rpages) { + rc = ENOMEM; + goto leave; + } + env->me_rpages[0].mid = 0; + env->me_rpcheck = MDB_ERPAGE_SIZE/2; + } +#endif env->me_flags = flags |= MDB_ENV_ACTIVE; if (rc) goto leave; @@ -4652,6 +5122,7 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode rc = ENOMEM; goto leave; } + env->me_dbxs[FREE_DBI].md_cmp = mdb_cmp_long; /* aligned MDB_INTEGERKEY */ /* For RDONLY, get lockfile after we know datafile exists */ if (!(flags & (MDB_RDONLY|MDB_NOLOCK))) { @@ -4669,8 +5140,12 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode len = OPEN_ALWAYS; } mode = FILE_ATTRIBUTE_NORMAL; - env->me_fd = CreateFile(dpath, oflags, FILE_SHARE_READ|FILE_SHARE_WRITE, + rc = utf8_to_utf16(dpath, -1, &wpath, NULL); + if (rc) + goto leave; + env->me_fd = CreateFileW(wpath, oflags, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, len, mode, NULL); + free(wpath); #else if (F_ISSET(flags, MDB_RDONLY)) oflags = O_RDONLY; @@ -4699,9 +5174,13 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode */ #ifdef _WIN32 len = OPEN_EXISTING; - env->me_mfd = CreateFile(dpath, oflags, + rc = utf8_to_utf16(dpath, -1, &wpath, NULL); + if (rc) + goto leave; + env->me_mfd = CreateFileW(wpath, oflags, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, len, mode | FILE_FLAG_WRITE_THROUGH, NULL); + free(wpath); #else oflags &= ~O_CREAT; env->me_mfd = open(dpath, oflags | MDB_DSYNC, mode); @@ -4717,28 +5196,30 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode if (rc) goto leave; } - if (!((flags & MDB_RDONLY) || - (env->me_pbuf = calloc(1, env->me_psize)))) - rc = ENOMEM; if (!(flags & MDB_RDONLY)) { MDB_txn *txn; int tsize = sizeof(MDB_txn), size = tsize + env->me_maxdbs * (sizeof(MDB_db)+sizeof(MDB_cursor *)+sizeof(unsigned int)+1); - txn = calloc(1, size); - if (txn) { + if ((env->me_pbuf = calloc(1, env->me_psize)) && + (txn = calloc(1, size))) + { txn->mt_dbs = (MDB_db *)((char *)txn + tsize); txn->mt_cursors = (MDB_cursor **)(txn->mt_dbs + env->me_maxdbs); txn->mt_dbiseqs = (unsigned int *)(txn->mt_cursors + env->me_maxdbs); txn->mt_dbflags = (unsigned char *)(txn->mt_dbiseqs + env->me_maxdbs); txn->mt_env = env; - txn->mt_dbxs = env->me_dbxs; -#ifdef VL32 - txn->mt_rpages = calloc(MDB_IDL_UM_SIZE, sizeof(MDB_ID2)); +#ifdef MDB_VL32 + txn->mt_rpages = malloc(MDB_TRPAGE_SIZE * sizeof(MDB_ID3)); if (!txn->mt_rpages) { free(txn); rc = ENOMEM; + goto leave; } + txn->mt_rpages[0].mid = 0; + txn->mt_rpcheck = MDB_TRPAGE_SIZE/2; #endif + txn->mt_dbxs = env->me_dbxs; + txn->mt_flags = MDB_TXN_FINISHED; env->me_txn0 = txn; } else { rc = ENOMEM; @@ -4765,7 +5246,7 @@ mdb_env_close0(MDB_env *env, int excl) /* Doing this here since me_dbxs may not exist during mdb_env_close */ if (env->me_dbxs) { - for (i = env->me_maxdbs; --i > MAIN_DBI; ) + for (i = env->me_maxdbs; --i >= CORE_DBS; ) free(env->me_dbxs[i].md_name.mv_data); free(env->me_dbxs); } @@ -4776,6 +5257,13 @@ mdb_env_close0(MDB_env *env, int excl) free(env->me_path); free(env->me_dirty_list); free(env->me_txn0); +#ifdef MDB_VL32 + { unsigned int x; + for (x=1; x<=env->me_rpages[0].mid; x++) + munmap(env->me_rpages[x].mptr, env->me_rpages[x].mcnt * env->me_psize); + } + free(env->me_rpages); +#endif mdb_midl_free(env->me_free_pgs); if (env->me_flags & MDB_ENV_TXKEY) { @@ -4792,8 +5280,8 @@ mdb_env_close0(MDB_env *env, int excl) } if (env->me_map) { -#ifdef VL32 - munmap(env->me_map, 2*env->me_psize); +#ifdef MDB_VL32 + munmap(env->me_map, NUM_METAS*env->me_psize); #else munmap(env->me_map, env->me_mapsize); #endif @@ -4806,8 +5294,12 @@ mdb_env_close0(MDB_env *env, int excl) MDB_PID_T pid = env->me_pid; /* Clearing readers is done in this function because * me_txkey with its destructor must be disabled first. + * + * We skip the the reader mutex, so we touch only + * data owned by this process (me_close_readers and + * our readers), and clear each reader atomically. */ - for (i = env->me_numreaders; --i >= 0; ) + for (i = env->me_close_readers; --i >= 0; ) if (env->me_txns->mti_readers[i].mr_pid == pid) env->me_txns->mti_readers[i].mr_pid = 0; #ifdef _WIN32 @@ -4833,6 +5325,16 @@ mdb_env_close0(MDB_env *env, int excl) sem_unlink(env->me_txns->mti_wmname); } } +#elif defined(MDB_USE_SYSV_SEM) + if (env->me_rmutex->semid != -1) { + /* If we have the filelock: If we are the + * only remaining user, clean up semaphores. + */ + if (excl == 0) + mdb_env_excl_lock(env, &excl); + if (excl > 0) + semctl(env->me_rmutex->semid, 0, IPC_RMID); + } #endif munmap((void *)env->me_txns, (env->me_maxreaders-1)*sizeof(MDB_reader)+sizeof(MDB_txninfo)); } @@ -4847,11 +5349,17 @@ mdb_env_close0(MDB_env *env, int excl) #endif (void) close(env->me_lfd); } +#ifdef MDB_VL32 +#ifdef _WIN32 + if (env->me_rpmutex) CloseHandle(env->me_rpmutex); +#else + pthread_mutex_destroy(&env->me_rpmutex); +#endif +#endif env->me_flags &= ~(MDB_ENV_ACTIVE|MDB_ENV_TXKEY); } - void ESECT mdb_env_close(MDB_env *env) { @@ -4871,18 +5379,18 @@ mdb_env_close(MDB_env *env) free(env); } -/** Compare two items pointing at aligned size_t's */ +/** Compare two items pointing at aligned mdb_size_t's */ static int mdb_cmp_long(const MDB_val *a, const MDB_val *b) { - return (*(size_t *)a->mv_data < *(size_t *)b->mv_data) ? -1 : - *(size_t *)a->mv_data > *(size_t *)b->mv_data; + return (*(mdb_size_t *)a->mv_data < *(mdb_size_t *)b->mv_data) ? -1 : + *(mdb_size_t *)a->mv_data > *(mdb_size_t *)b->mv_data; } /** Compare two items pointing at aligned unsigned int's. * * This is also set as #MDB_INTEGERDUP|#MDB_DUPFIXED's #MDB_dbx.%md_dcmp, - * but #mdb_cmp_clong() is called instead if the data type is size_t. + * but #mdb_cmp_clong() is called instead if the data type is mdb_size_t. */ static int mdb_cmp_int(const MDB_val *a, const MDB_val *b) @@ -4987,7 +5495,7 @@ mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp) nkeys = NUMKEYS(mp); - DPRINTF(("searching %u keys in %s %spage %"Z"u", + DPRINTF(("searching %u keys in %s %spage %"Yu"", nkeys, IS_LEAF(mp) ? "leaf" : "branch", IS_SUBP(mp) ? "sub-" : "", mdb_dbg_pgno(mp))); @@ -4999,7 +5507,7 @@ mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp) * alignment is guaranteed. Use faster mdb_cmp_int. */ if (cmp == mdb_cmp_cint && IS_BRANCH(mp)) { - if (NODEPTR(mp, 1)->mn_ksize == sizeof(size_t)) + if (NODEPTR(mp, 1)->mn_ksize == sizeof(mdb_size_t)) cmp = mdb_cmp_long; else cmp = mdb_cmp_int; @@ -5035,7 +5543,7 @@ mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp) DPRINTF(("found leaf index %u [%s], rc = %i", i, DKEY(&nodekey), rc)); else - DPRINTF(("found branch index %u [%s -> %"Z"u], rc = %i", + DPRINTF(("found branch index %u [%s -> %"Yu"], rc = %i", i, DKEY(&nodekey), NODEPGNO(node), rc)); #endif if (rc == 0) @@ -5083,15 +5591,15 @@ static void mdb_cursor_pop(MDB_cursor *mc) { if (mc->mc_snum) { -#if MDB_DEBUG - MDB_page *top = mc->mc_pg[mc->mc_top]; -#endif + DPRINTF(("popping page %"Yu" off db %d cursor %p", + mc->mc_pg[mc->mc_top]->mp_pgno, DDBI(mc), (void *) mc)); + mc->mc_snum--; - if (mc->mc_snum) + if (mc->mc_snum) { mc->mc_top--; - - DPRINTF(("popped page %"Z"u off db %d cursor %p", top->mp_pgno, - DDBI(mc), (void *) mc)); + } else { + mc->mc_flags &= ~C_INITIALIZED; + } } } @@ -5099,7 +5607,7 @@ mdb_cursor_pop(MDB_cursor *mc) static int mdb_cursor_push(MDB_cursor *mc, MDB_page *mp) { - DPRINTF(("pushing page %"Z"u on db %d cursor %p", mp->mp_pgno, + DPRINTF(("pushing page %"Yu" on db %d cursor %p", mp->mp_pgno, DDBI(mc), (void *) mc)); if (mc->mc_snum >= CURSOR_STACK) { @@ -5114,21 +5622,332 @@ mdb_cursor_push(MDB_cursor *mc, MDB_page *mp) return MDB_SUCCESS; } -/** Find the address of the page corresponding to a given page number. +#ifdef MDB_VL32 +/** Map a read-only page. + * There are two levels of tracking in use, a per-txn list and a per-env list. + * ref'ing and unref'ing the per-txn list is faster since it requires no + * locking. Pages are cached in the per-env list for global reuse, and a lock + * is required. Pages are not immediately unmapped when their refcnt goes to + * zero; they hang around in case they will be reused again soon. + * + * When the per-txn list gets full, all pages with refcnt=0 are purged from the + * list and their refcnts in the per-env list are decremented. + * + * When the per-env list gets full, all pages with refcnt=0 are purged from the + * list and their pages are unmapped. + * + * @note "full" means the list has reached its respective rpcheck threshold. + * This threshold slowly raises if no pages could be purged on a given check, + * and returns to its original value when enough pages were purged. + * + * If purging doesn't free any slots, filling the per-txn list will return + * MDB_TXN_FULL, and filling the per-env list returns MDB_MAP_FULL. + * + * Reference tracking in a txn is imperfect, pages can linger with non-zero + * refcnt even without active references. It was deemed to be too invasive + * to add unrefs in every required location. However, all pages are unref'd + * at the end of the transaction. This guarantees that no stale references + * linger in the per-env list. + * + * Usually we map chunks of 16 pages at a time, but if an overflow page begins + * at the tail of the chunk we extend the chunk to include the entire overflow + * page. Unfortunately, pages can be turned into overflow pages after their + * chunk was already mapped. In that case we must remap the chunk if the + * overflow page is referenced. If the chunk's refcnt is 0 we can just remap + * it, otherwise we temporarily map a new chunk just for the overflow page. + * + * @note this chunk handling means we cannot guarantee that a data item + * returned from the DB will stay alive for the duration of the transaction: + * We unref pages as soon as a cursor moves away from the page + * A subsequent op may cause a purge, which may unmap any unref'd chunks + * The caller must copy the data if it must be used later in the same txn. + * + * Also - our reference counting revolves around cursors, but overflow pages + * aren't pointed to by a cursor's page stack. We have to remember them + * explicitly, in the added mc_ovpg field. A single cursor can only hold a + * reference to one overflow page at a time. + * * @param[in] txn the transaction for this access. * @param[in] pgno the page number for the page to retrieve. * @param[out] ret address of a pointer where the page's address will be stored. + * @return 0 on success, non-zero on failure. + */ +static int +mdb_rpage_get(MDB_txn *txn, pgno_t pg0, MDB_page **ret) +{ + MDB_env *env = txn->mt_env; + MDB_page *p; + MDB_ID3L tl = txn->mt_rpages; + MDB_ID3L el = env->me_rpages; + MDB_ID3 id3; + unsigned x, rem; + pgno_t pgno; + int rc, retries = 1; +#ifdef _WIN32 + LARGE_INTEGER off; + SIZE_T len; +#define SET_OFF(off,val) off.QuadPart = val +#define MAP(rc,env,addr,len,off) \ + addr = NULL; \ + rc = NtMapViewOfSection(env->me_fmh, GetCurrentProcess(), &addr, 0, \ + len, &off, &len, ViewUnmap, (env->me_flags & MDB_RDONLY) ? 0 : MEM_RESERVE, PAGE_READONLY) +#else + off_t off; + size_t len; +#define SET_OFF(off,val) off = val +#define MAP(rc,env,addr,len,off) \ + addr = mmap(NULL, len, PROT_READ, MAP_SHARED, env->me_fd, off); \ + rc = (addr == MAP_FAILED) ? errno : 0 +#endif + + /* remember the offset of the actual page number, so we can + * return the correct pointer at the end. + */ + rem = pg0 & (MDB_RPAGE_CHUNK-1); + pgno = pg0 ^ rem; + + id3.mid = 0; + x = mdb_mid3l_search(tl, pgno); + if (x <= tl[0].mid && tl[x].mid == pgno) { + if (x != tl[0].mid && tl[x+1].mid == pg0) + x++; + /* check for overflow size */ + p = (MDB_page *)((char *)tl[x].mptr + rem * env->me_psize); + if (IS_OVERFLOW(p) && p->mp_pages + rem > tl[x].mcnt) { + id3.mcnt = p->mp_pages + rem; + len = id3.mcnt * env->me_psize; + SET_OFF(off, pgno * env->me_psize); + MAP(rc, env, id3.mptr, len, off); + if (rc) + return rc; + /* check for local-only page */ + if (rem) { + mdb_tassert(txn, tl[x].mid != pg0); + /* hope there's room to insert this locally. + * setting mid here tells later code to just insert + * this id3 instead of searching for a match. + */ + id3.mid = pg0; + goto notlocal; + } else { + /* ignore the mapping we got from env, use new one */ + tl[x].mptr = id3.mptr; + tl[x].mcnt = id3.mcnt; + /* if no active ref, see if we can replace in env */ + if (!tl[x].mref) { + unsigned i; + pthread_mutex_lock(&env->me_rpmutex); + i = mdb_mid3l_search(el, tl[x].mid); + if (el[i].mref == 1) { + /* just us, replace it */ + munmap(el[i].mptr, el[i].mcnt * env->me_psize); + el[i].mptr = tl[x].mptr; + el[i].mcnt = tl[x].mcnt; + } else { + /* there are others, remove ourself */ + el[i].mref--; + } + pthread_mutex_unlock(&env->me_rpmutex); + } + } + } + id3.mptr = tl[x].mptr; + id3.mcnt = tl[x].mcnt; + tl[x].mref++; + goto ok; + } + +notlocal: + if (tl[0].mid >= MDB_TRPAGE_MAX - txn->mt_rpcheck) { + unsigned i, y; + /* purge unref'd pages from our list and unref in env */ + pthread_mutex_lock(&env->me_rpmutex); +retry: + y = 0; + for (i=1; ime_psize); + continue; + } + x = mdb_mid3l_search(el, tl[i].mid); + el[x].mref--; + } + } + pthread_mutex_unlock(&env->me_rpmutex); + if (!y) { + /* we didn't find any unref'd chunks. + * if we're out of room, fail. + */ + if (tl[0].mid >= MDB_TRPAGE_MAX) + return MDB_TXN_FULL; + /* otherwise, raise threshold for next time around + * and let this go. + */ + txn->mt_rpcheck /= 2; + } else { + /* we found some unused; consolidate the list */ + for (i=y+1; i<= tl[0].mid; i++) + if (tl[i].mref) + tl[y++] = tl[i]; + tl[0].mid = y-1; + /* decrease the check threshold toward its original value */ + if (!txn->mt_rpcheck) + txn->mt_rpcheck = 1; + while (txn->mt_rpcheck < tl[0].mid && txn->mt_rpcheck < MDB_TRPAGE_SIZE/2) + txn->mt_rpcheck *= 2; + } + } + if (tl[0].mid < MDB_TRPAGE_SIZE) { + id3.mref = 1; + if (id3.mid) + goto found; + /* don't map past last written page in read-only envs */ + if ((env->me_flags & MDB_RDONLY) && pgno + MDB_RPAGE_CHUNK-1 > txn->mt_last_pgno) + id3.mcnt = txn->mt_last_pgno + 1 - pgno; + else + id3.mcnt = MDB_RPAGE_CHUNK; + len = id3.mcnt * env->me_psize; + id3.mid = pgno; + + /* search for page in env */ + pthread_mutex_lock(&env->me_rpmutex); + x = mdb_mid3l_search(el, pgno); + if (x <= el[0].mid && el[x].mid == pgno) { + id3.mptr = el[x].mptr; + id3.mcnt = el[x].mcnt; + /* check for overflow size */ + p = (MDB_page *)((char *)id3.mptr + rem * env->me_psize); + if (IS_OVERFLOW(p) && p->mp_pages + rem > id3.mcnt) { + id3.mcnt = p->mp_pages + rem; + len = id3.mcnt * env->me_psize; + SET_OFF(off, pgno * env->me_psize); + MAP(rc, env, id3.mptr, len, off); + if (rc) + goto fail; + if (!el[x].mref) { + munmap(el[x].mptr, el[x].mcnt); + el[x].mptr = id3.mptr; + el[x].mcnt = id3.mcnt; + } else { + id3.mid = pg0; + pthread_mutex_unlock(&env->me_rpmutex); + goto found; + } + } + el[x].mref++; + pthread_mutex_unlock(&env->me_rpmutex); + goto found; + } + if (el[0].mid >= MDB_ERPAGE_MAX - env->me_rpcheck) { + /* purge unref'd pages */ + unsigned i, y = 0; + for (i=1; ime_psize * el[i].mcnt); + } + } + if (!y) { + if (retries) { + /* see if we can unref some local pages */ + retries--; + id3.mid = 0; + goto retry; + } + if (el[0].mid >= MDB_ERPAGE_MAX) { + pthread_mutex_unlock(&env->me_rpmutex); + return MDB_MAP_FULL; + } + env->me_rpcheck /= 2; + } else { + for (i=y+1; i<= el[0].mid; i++) + if (el[i].mref) + el[y++] = el[i]; + el[0].mid = y-1; + if (!env->me_rpcheck) + env->me_rpcheck = 1; + while (env->me_rpcheck < el[0].mid && env->me_rpcheck < MDB_ERPAGE_SIZE/2) + env->me_rpcheck *= 2; + } + } + SET_OFF(off, pgno * env->me_psize); + MAP(rc, env, id3.mptr, len, off); + if (rc) { +fail: + pthread_mutex_unlock(&env->me_rpmutex); + return rc; + } + /* If this page is far enough from the end of the env, scan for + * any overflow pages that would spill onto another block. + * Note we must compare against mt_last_pgno, the last written + * page in the environment. Not mt_next_pgno, which increases + * for every newly allocated (but not yet written) page. If + * we scanned beyond the last written page we'd get a bus error. + */ + if (pgno + MDB_RPAGE_CHUNK <= txn->mt_last_pgno) { + int i; + char *cp = (char *)id3.mptr + rem * env->me_psize; + for (i=rem; imp_pages; + if (nop + i > MDB_RPAGE_CHUNK) { + munmap(id3.mptr, len); + id3.mcnt = nop + i; + len = id3.mcnt * env->me_psize; + MAP(rc, env, id3.mptr, len, off); + if (rc) + goto fail; + break; + } + i += nop; + cp += nop * env->me_psize; + } else { + i++; + cp += env->me_psize; + } + } + } + mdb_mid3l_insert(el, &id3); + pthread_mutex_unlock(&env->me_rpmutex); +found: + mdb_mid3l_insert(tl, &id3); + } else { + return MDB_TXN_FULL; + } +ok: + p = (MDB_page *)((char *)id3.mptr + rem * env->me_psize); +#if MDB_DEBUG /* we don't need this check any more */ + if (IS_OVERFLOW(p)) { + mdb_tassert(txn, p->mp_pages + rem <= id3.mcnt); + } +#endif + *ret = p; + return MDB_SUCCESS; +} +#endif + +/** Find the address of the page corresponding to a given page number. + * @param[in] mc the cursor accessing the page. + * @param[in] pgno the page number for the page to retrieve. + * @param[out] ret address of a pointer where the page's address will be stored. * @param[out] lvl dirty_list inheritance level of found page. 1=current txn, 0=mapped page. * @return 0 on success, non-zero on failure. */ static int -mdb_page_get(MDB_txn *txn, pgno_t pgno, MDB_page **ret, int *lvl) +mdb_page_get(MDB_cursor *mc, pgno_t pgno, MDB_page **ret, int *lvl) { + MDB_txn *txn = mc->mc_txn; +#ifndef MDB_VL32 MDB_env *env = txn->mt_env; +#endif MDB_page *p = NULL; int level; - if (!((txn->mt_flags & MDB_TXN_RDONLY) | (env->me_flags & MDB_WRITEMAP))) { + if (! (mc->mc_flags & (C_ORIG_RDONLY|C_WRITEMAP))) { MDB_txn *tx2 = txn; level = 1; do { @@ -5143,7 +5962,13 @@ mdb_page_get(MDB_txn *txn, pgno_t pgno, MDB_page **ret, int *lvl) MDB_ID pn = pgno << 1; x = mdb_midl_search(tx2->mt_spill_pgs, pn); if (x <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[x] == pn) { +#ifdef MDB_VL32 + int rc = mdb_rpage_get(txn, pgno, &p); + if (rc) + return rc; +#else p = (MDB_page *)(env->me_map + env->me_psize * pgno); +#endif goto done; } } @@ -5160,62 +5985,17 @@ mdb_page_get(MDB_txn *txn, pgno_t pgno, MDB_page **ret, int *lvl) if (pgno < txn->mt_next_pgno) { level = 0; -#ifdef VL32 +#ifdef MDB_VL32 { - unsigned x = mdb_mid2l_search(txn->mt_rpages, pgno); - if (x <= txn->mt_rpages[0].mid && txn->mt_rpages[x].mid == pgno) { - p = txn->mt_rpages[x].mptr; - goto done; - } - if (txn->mt_rpages[0].mid >= MDB_IDL_UM_MAX) { - /* unmap some other page */ - mdb_tassert(txn, 0); - } - if (txn->mt_rpages[0].mid < MDB_IDL_UM_SIZE) { - MDB_ID2 id2; - size_t len = env->me_psize; - int np; -#ifdef _WIN32 - size_t off = pgno * env->me_psize; - DWORD lo, hi; - lo = off & 0xffffffff; - hi = off >> 16 >> 16; - p = MapViewOfFile(env->me_fmh, FILE_MAP_READ, hi, lo, len); - if (p == NULL) - return ErrCode(); - if (IS_OVERFLOW(p)) { - np = p->mp_pages; - UnmapViewOfFile(p); - len *= np; - p = MapViewOfFile(env->me_fmh, FILE_MAP_READ, hi, lo, len); - if (p == NULL) - return ErrCode(); - } -#else - off_t off = pgno * env->me_psize; - p = mmap(NULL, len, PROT_READ, MAP_SHARED, env->me_fd, off); - if (p == MAP_FAILED) - return errno; - if (IS_OVERFLOW(p)) { - np = p->mp_pages; - munmap(p, len); - len *= np; - p = mmap(NULL, len, PROT_READ, MAP_SHARED, env->me_fd, off); - if (p == MAP_FAILED) - return errno; - } -#endif - id2.mid = pgno; - id2.mptr = p; - mdb_mid2l_insert(txn->mt_rpages, &id2); - goto done; - } + int rc = mdb_rpage_get(txn, pgno, &p); + if (rc) + return rc; } #else p = (MDB_page *)(env->me_map + env->me_psize * pgno); #endif } else { - DPRINTF(("page %"Z"u not found", pgno)); + DPRINTF(("page %"Yu" not found", pgno)); txn->mt_flags |= MDB_TXN_ERROR; return MDB_PAGE_NOTFOUND; } @@ -5241,9 +6021,13 @@ mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int flags) MDB_node *node; indx_t i; - DPRINTF(("branch page %"Z"u has %u keys", mp->mp_pgno, NUMKEYS(mp))); - mdb_cassert(mc, NUMKEYS(mp) > 1); - DPRINTF(("found index 0 to page %"Z"u", NODEPGNO(NODEPTR(mp, 0)))); + DPRINTF(("branch page %"Yu" has %u keys", mp->mp_pgno, NUMKEYS(mp))); + /* Don't assert on branch pages in the FreeDB. We can get here + * while in the process of rebalancing a FreeDB branch page; we must + * let that proceed. ITS#8336 + */ + mdb_cassert(mc, !mc->mc_dbi || NUMKEYS(mp) > 1); + DPRINTF(("found index 0 to page %"Yu"", NODEPGNO(NODEPTR(mp, 0)))); if (flags & (MDB_PS_FIRST|MDB_PS_LAST)) { i = 0; @@ -5267,7 +6051,7 @@ mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int flags) mdb_cassert(mc, i < NUMKEYS(mp)); node = NODEPTR(mp, i); - if ((rc = mdb_page_get(mc->mc_txn, NODEPGNO(node), &mp, NULL)) != 0) + if ((rc = mdb_page_get(mc, NODEPGNO(node), &mp, NULL)) != 0) return rc; mc->mc_ki[mc->mc_top] = i; @@ -5288,7 +6072,7 @@ mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int flags) return MDB_CORRUPTED; } - DPRINTF(("found leaf page %"Z"u for key [%s]", mp->mp_pgno, + DPRINTF(("found leaf page %"Yu" for key [%s]", mp->mp_pgno, key ? DKEY(key) : "null")); mc->mc_flags |= C_INITIALIZED; mc->mc_flags &= ~C_EOF; @@ -5309,7 +6093,7 @@ mdb_page_search_lowest(MDB_cursor *mc) MDB_node *node = NODEPTR(mp, 0); int rc; - if ((rc = mdb_page_get(mc->mc_txn, NODEPGNO(node), &mp, NULL)) != 0) + if ((rc = mdb_page_get(mc, NODEPGNO(node), &mp, NULL)) != 0) return rc; mc->mc_ki[mc->mc_top] = 0; @@ -5338,8 +6122,8 @@ mdb_page_search(MDB_cursor *mc, MDB_val *key, int flags) /* Make sure the txn is still viable, then find the root from * the txn's db table and set it as the root of the cursor's stack. */ - if (F_ISSET(mc->mc_txn->mt_flags, MDB_TXN_ERROR)) { - DPUTS("transaction has failed, must abort"); + if (mc->mc_txn->mt_flags & MDB_TXN_BLOCKED) { + DPUTS("transaction may not be used now"); return MDB_BAD_TXN; } else { /* Make sure we're using an up-to-date root */ @@ -5359,7 +6143,9 @@ mdb_page_search(MDB_cursor *mc, MDB_val *key, int flags) &mc->mc_dbx->md_name, &exact); if (!exact) return MDB_NOTFOUND; - rc = mdb_node_read(mc->mc_txn, leaf, &data); + if ((leaf->mn_flags & (F_DUPDATA|F_SUBDATA)) != F_SUBDATA) + return MDB_INCOMPATIBLE; /* not a named DB */ + rc = mdb_node_read(&mc2, leaf, &data); if (rc) return rc; memcpy(&flags, ((char *) data.mv_data + offsetof(MDB_db, md_flags)), @@ -5382,14 +6168,26 @@ mdb_page_search(MDB_cursor *mc, MDB_val *key, int flags) } mdb_cassert(mc, root > 1); - if (!mc->mc_pg[0] || mc->mc_pg[0]->mp_pgno != root) - if ((rc = mdb_page_get(mc->mc_txn, root, &mc->mc_pg[0], NULL)) != 0) + if (!mc->mc_pg[0] || mc->mc_pg[0]->mp_pgno != root) { +#ifdef MDB_VL32 + if (mc->mc_pg[0]) + MDB_PAGE_UNREF(mc->mc_txn, mc->mc_pg[0]); +#endif + if ((rc = mdb_page_get(mc, root, &mc->mc_pg[0], NULL)) != 0) return rc; + } +#ifdef MDB_VL32 + { + int i; + for (i=1; imc_snum; i++) + MDB_PAGE_UNREF(mc->mc_txn, mc->mc_pg[i]); + } +#endif mc->mc_snum = 1; mc->mc_top = 0; - DPRINTF(("db %d root page %"Z"u has flags 0x%X", + DPRINTF(("db %d root page %"Yu" has flags 0x%X", DDBI(mc), root, mc->mc_pg[0]->mp_flags)); if (flags & MDB_PS_MODIFY) { @@ -5414,7 +6212,7 @@ mdb_ovpage_free(MDB_cursor *mc, MDB_page *mp) MDB_ID pn = pg << 1; int rc; - DPRINTF(("free ov page %"Z"u (%d)", pg, ovpages)); + DPRINTF(("free ov page %"Yu" (%d)", pg, ovpages)); /* If the page is dirty or on the spill list we just acquired it, * so we should give it back to our current free list, if any. * Otherwise put it onto the list of pages we freed in this txn. @@ -5458,6 +6256,7 @@ mdb_ovpage_free(MDB_cursor *mc, MDB_page *mp) return MDB_CORRUPTED; } } + txn->mt_dirty_room++; if (!(env->me_flags & MDB_WRITEMAP)) mdb_dpage_free(env, mp); release: @@ -5479,18 +6278,24 @@ release: } /** Return the data associated with a given node. - * @param[in] txn The transaction for this operation. + * @param[in] mc The cursor for this operation. * @param[in] leaf The node being read. * @param[out] data Updated to point to the node's data. * @return 0 on success, non-zero on failure. */ static int -mdb_node_read(MDB_txn *txn, MDB_node *leaf, MDB_val *data) +mdb_node_read(MDB_cursor *mc, MDB_node *leaf, MDB_val *data) { MDB_page *omp; /* overflow page */ pgno_t pgno; int rc; +#ifdef MDB_VL32 + if (mc->mc_ovpg) { + MDB_PAGE_UNREF(mc->mc_txn, mc->mc_ovpg); + mc->mc_ovpg = 0; + } +#endif if (!F_ISSET(leaf->mn_flags, F_BIGDATA)) { data->mv_size = NODEDSZ(leaf); data->mv_data = NODEDATA(leaf); @@ -5501,11 +6306,14 @@ mdb_node_read(MDB_txn *txn, MDB_node *leaf, MDB_val *data) */ data->mv_size = NODEDSZ(leaf); memcpy(&pgno, NODEDATA(leaf), sizeof(pgno)); - if ((rc = mdb_page_get(txn, pgno, &omp, NULL)) != 0) { - DPRINTF(("read overflow page %"Z"u failed", pgno)); + if ((rc = mdb_page_get(mc, pgno, &omp, NULL)) != 0) { + DPRINTF(("read overflow page %"Yu" failed", pgno)); return rc; } data->mv_data = METADATA(omp); +#ifdef MDB_VL32 + mc->mc_ovpg = omp; +#endif return MDB_SUCCESS; } @@ -5516,19 +6324,28 @@ mdb_get(MDB_txn *txn, MDB_dbi dbi, { MDB_cursor mc; MDB_xcursor mx; - int exact = 0; + int exact = 0, rc; DKBUF; DPRINTF(("===> get db %u key [%s]", dbi, DKEY(key))); - if (!key || !data || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!key || !data || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; - if (txn->mt_flags & MDB_TXN_ERROR) + if (txn->mt_flags & MDB_TXN_BLOCKED) return MDB_BAD_TXN; mdb_cursor_init(&mc, txn, dbi, &mx); - return mdb_cursor_set(&mc, key, data, MDB_SET, &exact); + rc = mdb_cursor_set(&mc, key, data, MDB_SET, &exact); +#ifdef MDB_VL32 + { + /* unref all the pages - caller must copy the data + * before doing anything else + */ + mdb_cursor_unref(&mc); + } +#endif + return rc; } /** Find a sibling for a page. @@ -5545,7 +6362,7 @@ mdb_cursor_sibling(MDB_cursor *mc, int move_right) int rc; MDB_node *indx; MDB_page *mp; -#ifdef VL32 +#ifdef MDB_VL32 MDB_page *op; #endif @@ -5553,12 +6370,11 @@ mdb_cursor_sibling(MDB_cursor *mc, int move_right) return MDB_NOTFOUND; /* root has no siblings */ } -#ifdef VL32 +#ifdef MDB_VL32 op = mc->mc_pg[mc->mc_top]; #endif - mdb_cursor_pop(mc); - DPRINTF(("parent page is page %"Z"u, index %u", + DPRINTF(("parent page is page %"Yu", index %u", mc->mc_pg[mc->mc_top]->mp_pgno, mc->mc_ki[mc->mc_top])); if (move_right ? (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mc->mc_pg[mc->mc_top])) @@ -5581,23 +6397,10 @@ mdb_cursor_sibling(MDB_cursor *mc, int move_right) } mdb_cassert(mc, IS_BRANCH(mc->mc_pg[mc->mc_top])); -#ifdef VL32 - { - MDB_ID2L rl = mc->mc_txn->mt_rpages; - unsigned x = mdb_mid2l_search(rl, op->mp_pgno); - if (x <= rl[0].mid && rl[x].mid == op->mp_pgno) { - munmap(op, mc->mc_txn->mt_env->me_psize); - while (x < rl[0].mid) { - rl[x] = rl[x+1]; - x++; - } - rl[0].mid--; - } - } -#endif + MDB_PAGE_UNREF(mc->mc_txn, op); indx = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if ((rc = mdb_page_get(mc->mc_txn, NODEPGNO(indx), &mp, NULL)) != 0) { + if ((rc = mdb_page_get(mc, NODEPGNO(indx), &mp, NULL)) != 0) { /* mc will be inconsistent if caller does mc_snum++ as above */ mc->mc_flags &= ~(C_INITIALIZED|C_EOF); return rc; @@ -5637,6 +6440,13 @@ mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) return rc; } } +#ifdef MDB_VL32 + else { + if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + mdb_cursor_unref(&mc->mc_xcursor->mx_cursor); + } + } +#endif } else { mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); if (op == MDB_NEXT_DUP) @@ -5644,7 +6454,7 @@ mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) } } - DPRINTF(("cursor_next: top page is %"Z"u in cursor %p", + DPRINTF(("cursor_next: top page is %"Yu" in cursor %p", mdb_dbg_pgno(mp), (void *) mc)); if (mc->mc_flags & C_DEL) goto skip; @@ -5656,12 +6466,12 @@ mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) return rc; } mp = mc->mc_pg[mc->mc_top]; - DPRINTF(("next page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top])); + DPRINTF(("next page is %"Yu", key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top])); } else mc->mc_ki[mc->mc_top]++; skip: - DPRINTF(("==> cursor points to page %"Z"u with %u keys, key index %u", + DPRINTF(("==> cursor points to page %"Yu" with %u keys, key index %u", mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top])); if (IS_LEAF2(mp)) { @@ -5677,7 +6487,7 @@ skip: mdb_xcursor_init1(mc, leaf); } if (data) { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) + if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS) return rc; if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { @@ -5716,6 +6526,13 @@ mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) return rc; } } +#ifdef MDB_VL32 + else { + if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + mdb_cursor_unref(&mc->mc_xcursor->mx_cursor); + } + } +#endif } else { mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); if (op == MDB_PREV_DUP) @@ -5723,7 +6540,7 @@ mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) } } - DPRINTF(("cursor_prev: top page is %"Z"u in cursor %p", + DPRINTF(("cursor_prev: top page is %"Yu" in cursor %p", mdb_dbg_pgno(mp), (void *) mc)); if (mc->mc_ki[mc->mc_top] == 0) { @@ -5733,13 +6550,13 @@ mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) } mp = mc->mc_pg[mc->mc_top]; mc->mc_ki[mc->mc_top] = NUMKEYS(mp) - 1; - DPRINTF(("prev page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top])); + DPRINTF(("prev page is %"Yu", key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top])); } else mc->mc_ki[mc->mc_top]--; mc->mc_flags &= ~C_EOF; - DPRINTF(("==> cursor points to page %"Z"u with %u keys, key index %u", + DPRINTF(("==> cursor points to page %"Yu" with %u keys, key index %u", mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top])); if (IS_LEAF2(mp)) { @@ -5755,7 +6572,7 @@ mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) mdb_xcursor_init1(mc, leaf); } if (data) { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) + if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS) return rc; if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { @@ -5874,6 +6691,8 @@ mdb_cursor_set(MDB_cursor *mc, MDB_val *key, MDB_val *data, } else return MDB_NOTFOUND; } + } else { + mc->mc_pg[0] = 0; } rc = mdb_page_search(mc, key, 0); @@ -5892,8 +6711,10 @@ set2: if (leaf == NULL) { DPUTS("===> inexact leaf not found, goto sibling"); - if ((rc = mdb_cursor_sibling(mc, 1)) != MDB_SUCCESS) + if ((rc = mdb_cursor_sibling(mc, 1)) != MDB_SUCCESS) { + mc->mc_flags |= C_EOF; return rc; /* no entries matched */ + } mp = mc->mc_pg[mc->mc_top]; mdb_cassert(mc, IS_LEAF(mp)); leaf = NODEPTR(mp, 0); @@ -5911,6 +6732,11 @@ set1: return MDB_SUCCESS; } +#ifdef MDB_VL32 + if (mc->mc_xcursor && mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + mdb_cursor_unref(&mc->mc_xcursor->mx_cursor); + } +#endif if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { mdb_xcursor_init1(mc, leaf); } @@ -5933,11 +6759,11 @@ set1: } else if (op == MDB_GET_BOTH || op == MDB_GET_BOTH_RANGE) { MDB_val olddata; MDB_cmp_func *dcmp; - if ((rc = mdb_node_read(mc->mc_txn, leaf, &olddata)) != MDB_SUCCESS) + if ((rc = mdb_node_read(mc, leaf, &olddata)) != MDB_SUCCESS) return rc; dcmp = mc->mc_dbx->md_dcmp; -#if UINT_MAX < SIZE_MAX - if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(size_t)) +#if UINT_MAX < SIZE_MAX || defined(MDB_VL32) + if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(mdb_size_t)) dcmp = mdb_cmp_clong; #endif rc = dcmp(data, &olddata); @@ -5951,7 +6777,7 @@ set1: } else { if (mc->mc_xcursor) mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) + if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS) return rc; } } @@ -5971,8 +6797,14 @@ mdb_cursor_first(MDB_cursor *mc, MDB_val *key, MDB_val *data) int rc; MDB_node *leaf; - if (mc->mc_xcursor) + if (mc->mc_xcursor) { +#ifdef MDB_VL32 + if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + mdb_cursor_unref(&mc->mc_xcursor->mx_cursor); + } +#endif mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); + } if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { rc = mdb_page_search(mc, NULL, MDB_PS_FIRST); @@ -6000,7 +6832,7 @@ mdb_cursor_first(MDB_cursor *mc, MDB_val *key, MDB_val *data) if (rc) return rc; } else { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) + if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS) return rc; } } @@ -6015,8 +6847,14 @@ mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data) int rc; MDB_node *leaf; - if (mc->mc_xcursor) + if (mc->mc_xcursor) { +#ifdef MDB_VL32 + if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + mdb_cursor_unref(&mc->mc_xcursor->mx_cursor); + } +#endif mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); + } if (!(mc->mc_flags & C_EOF)) { @@ -6045,7 +6883,7 @@ mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data) if (rc) return rc; } else { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) + if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS) return rc; } } @@ -6065,7 +6903,7 @@ mdb_cursor_get(MDB_cursor *mc, MDB_val *key, MDB_val *data, if (mc == NULL) return EINVAL; - if (mc->mc_txn->mt_flags & MDB_TXN_ERROR) + if (mc->mc_txn->mt_flags & MDB_TXN_BLOCKED) return MDB_BAD_TXN; switch (op) { @@ -6089,11 +6927,9 @@ mdb_cursor_get(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_GET_KEY(leaf, key); if (data) { if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - if (mc->mc_flags & C_DEL) - mdb_xcursor_init1(mc, leaf); rc = mdb_cursor_get(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_GET_CURRENT); } else { - rc = mdb_node_read(mc->mc_txn, leaf, data); + rc = mdb_node_read(mc, leaf, data); } } } @@ -6199,7 +7035,7 @@ fetchm: MDB_node *leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) { MDB_GET_KEY(leaf, key); - rc = mdb_node_read(mc->mc_txn, leaf, data); + rc = mdb_node_read(mc, leaf, data); break; } } @@ -6236,7 +7072,7 @@ mdb_cursor_touch(MDB_cursor *mc) { int rc = MDB_SUCCESS; - if (mc->mc_dbi > MAIN_DBI && !(*mc->mc_dbflag & DB_DIRTY)) { + if (mc->mc_dbi >= CORE_DBS && !(*mc->mc_dbflag & DB_DIRTY)) { MDB_cursor mc2; MDB_xcursor mcx; if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi)) @@ -6264,10 +7100,9 @@ int mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data, unsigned int flags) { - enum { MDB_NO_ROOT = MDB_LAST_ERRCODE+10 }; /* internal code */ MDB_env *env; MDB_node *leaf = NULL; - MDB_page *fp, *mp; + MDB_page *fp, *mp, *sub_root = NULL; uint16_t fp_flags; MDB_val xdata, *rdata, dkey, olddata; MDB_db dummy; @@ -6296,7 +7131,7 @@ mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data, nospill = flags & MDB_NOSPILL; flags &= ~MDB_NOSPILL; - if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) + if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED)) return (mc->mc_txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN; if (key->mv_size-1 >= ENV_MAXKEY(env)) @@ -6421,16 +7256,18 @@ fix_parent: * update branch key if there is a parent page */ if (mc->mc_top && !mc->mc_ki[mc->mc_top]) { - unsigned short top = mc->mc_top; + unsigned short dtop = 1; mc->mc_top--; /* slot 0 is always an empty key, find real slot */ - while (mc->mc_top && !mc->mc_ki[mc->mc_top]) + while (mc->mc_top && !mc->mc_ki[mc->mc_top]) { mc->mc_top--; + dtop++; + } if (mc->mc_ki[mc->mc_top]) rc2 = mdb_update_key(mc, key); else rc2 = MDB_SUCCESS; - mc->mc_top = top; + mc->mc_top += dtop; if (rc2) return rc2; } @@ -6460,13 +7297,13 @@ more: if (flags == MDB_CURRENT) goto current; dcmp = mc->mc_dbx->md_dcmp; -#if UINT_MAX < SIZE_MAX - if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(size_t)) +#if UINT_MAX < SIZE_MAX || defined(MDB_VL32) + if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(mdb_size_t)) dcmp = mdb_cmp_clong; #endif /* does data match? */ if (!dcmp(data, &olddata)) { - if (flags & MDB_NODUPDATA) + if (flags & (MDB_NODUPDATA|MDB_APPENDDUP)) return MDB_KEYEXIST; /* overwrite it */ goto current; @@ -6547,6 +7384,7 @@ prep_subDB: offset = env->me_psize - olddata.mv_size; flags |= F_DUPDATA|F_SUBDATA; dummy.md_root = mp->mp_pgno; + sub_root = mp; } if (mp != fp) { mp->mp_flags = fp_flags | P_DIRTY; @@ -6571,6 +7409,9 @@ prep_subDB: goto new_sub; } current: + /* LMDB passes F_SUBDATA in 'flags' to write a DB record */ + if ((leaf->mn_flags ^ flags) & F_SUBDATA) + return MDB_INCOMPATIBLE; /* overflow page overwrites need special handling */ if (F_ISSET(leaf->mn_flags, F_BIGDATA)) { MDB_page *omp; @@ -6578,7 +7419,7 @@ current: int level, ovpages, dpages = OVPAGES(data->mv_size, env->me_psize); memcpy(&pg, olddata.mv_data, sizeof(pg)); - if ((rc2 = mdb_page_get(mc->mc_txn, pg, &omp, &level)) != 0) + if ((rc2 = mdb_page_get(mc, pg, &omp, &level)) != 0) return rc2; ovpages = omp->mp_pages; @@ -6607,6 +7448,7 @@ current: return ENOMEM; id2.mid = pg; id2.mptr = np; + /* Note - this page is already counted in parent's dirty_room */ rc2 = mdb_mid2l_insert(mc->mc_txn->mt_u.dirty_list, &id2); mdb_cassert(mc, rc2 == 0); if (!(flags & MDB_RESERVE)) { @@ -6663,7 +7505,7 @@ new_sub: } else { /* There is room already in this leaf page. */ rc = mdb_node_add(mc, mc->mc_ki[mc->mc_top], key, rdata, 0, nflags); - if (rc == 0 && insert_key) { + if (rc == 0) { /* Adjust other cursors pointing to mp */ MDB_cursor *m2, *m3; MDB_dbi dbi = mc->mc_dbi; @@ -6675,10 +7517,15 @@ new_sub: m3 = &m2->mc_xcursor->mx_cursor; else m3 = m2; - if (m3 == mc || m3->mc_snum < mc->mc_snum) continue; - if (m3->mc_pg[i] == mp && m3->mc_ki[i] >= mc->mc_ki[i]) { + if (m3 == mc || m3->mc_snum < mc->mc_snum || m3->mc_pg[i] != mp) continue; + if (m3->mc_ki[i] >= mc->mc_ki[i] && insert_key) { m3->mc_ki[i]++; } + if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) { + MDB_node *n2 = NODEPTR(mp, m3->mc_ki[i]); + if ((n2->mn_flags & (F_SUBDATA|F_DUPDATA)) == F_DUPDATA) + m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(n2); + } } } } @@ -6690,7 +7537,7 @@ new_sub: * DB are all zero size. */ if (do_sub) { - int xflags; + int xflags, new_dupdata; size_t ecount; put_sub: xdata.mv_size = 0; @@ -6703,27 +7550,38 @@ put_sub: xflags = (flags & MDB_NODUPDATA) ? MDB_NOOVERWRITE|MDB_NOSPILL : MDB_NOSPILL; } + if (sub_root) + mc->mc_xcursor->mx_cursor.mc_pg[0] = sub_root; + new_dupdata = (int)dkey.mv_size; /* converted, write the original data first */ if (dkey.mv_size) { rc = mdb_cursor_put(&mc->mc_xcursor->mx_cursor, &dkey, &xdata, xflags); if (rc) goto bad_sub; - { - /* Adjust other cursors pointing to mp */ - MDB_cursor *m2; - unsigned i = mc->mc_top; - MDB_page *mp = mc->mc_pg[i]; - - for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) { - if (m2 == mc || m2->mc_snum < mc->mc_snum) continue; - if (!(m2->mc_flags & C_INITIALIZED)) continue; - if (m2->mc_pg[i] == mp && m2->mc_ki[i] == mc->mc_ki[i]) { - mdb_xcursor_init1(m2, leaf); + /* we've done our job */ + dkey.mv_size = 0; + } + if (!(leaf->mn_flags & F_SUBDATA) || sub_root) { + /* Adjust other cursors pointing to mp */ + MDB_cursor *m2; + MDB_xcursor *mx = mc->mc_xcursor; + unsigned i = mc->mc_top; + MDB_page *mp = mc->mc_pg[i]; + int nkeys = NUMKEYS(mp); + + for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) { + if (m2 == mc || m2->mc_snum < mc->mc_snum) continue; + if (!(m2->mc_flags & C_INITIALIZED)) continue; + if (m2->mc_pg[i] == mp) { + if (m2->mc_ki[i] == mc->mc_ki[i]) { + mdb_xcursor_init2(m2, mx, new_dupdata); + } else if (!insert_key && m2->mc_ki[i] < nkeys) { + MDB_node *n2 = NODEPTR(mp, m2->mc_ki[i]); + if ((n2->mn_flags & (F_SUBDATA|F_DUPDATA)) == F_DUPDATA) + m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(n2); } } } - /* we've done our job */ - dkey.mv_size = 0; } ecount = mc->mc_xcursor->mx_db.md_entries; if (flags & MDB_APPENDDUP) @@ -6775,7 +7633,7 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags) MDB_page *mp; int rc; - if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) + if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED)) return (mc->mc_txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN; if (!(mc->mc_flags & C_INITIALIZED)) @@ -6800,6 +7658,7 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags) if (flags & MDB_NODUPDATA) { /* mdb_cursor_del0() will subtract the final entry */ mc->mc_db->md_entries -= mc->mc_xcursor->mx_db.md_entries - 1; + mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED; } else { if (!F_ISSET(leaf->mn_flags, F_SUBDATA)) { mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); @@ -6819,17 +7678,25 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags) mdb_node_shrink(mp, mc->mc_ki[mc->mc_top]); leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); - /* fix other sub-DB cursors pointed at this fake page */ + /* fix other sub-DB cursors pointed at fake pages on this page */ for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) { if (m2 == mc || m2->mc_snum < mc->mc_snum) continue; - if (m2->mc_pg[mc->mc_top] == mp && - m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top]) - m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); + if (!(m2->mc_flags & C_INITIALIZED)) continue; + if (m2->mc_pg[mc->mc_top] == mp) { + if (m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top]) { + m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); + } else { + MDB_node *n2 = NODEPTR(mp, m2->mc_ki[mc->mc_top]); + if (!(n2->mn_flags & F_SUBDATA)) + m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(n2); + } + } } } mc->mc_db->md_entries--; - mc->mc_flags |= C_DEL; return rc; + } else { + mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED; } /* otherwise fall thru and delete the sub-DB */ } @@ -6841,6 +7708,11 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags) goto fail; } } + /* LMDB passes F_SUBDATA in 'flags' to delete a DB record */ + else if ((leaf->mn_flags ^ flags) & F_SUBDATA) { + rc = MDB_INCOMPATIBLE; + goto fail; + } /* add overflow pages to free list */ if (F_ISSET(leaf->mn_flags, F_BIGDATA)) { @@ -6848,7 +7720,7 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags) pgno_t pg; memcpy(&pg, NODEDATA(leaf), sizeof(pg)); - if ((rc = mdb_page_get(mc->mc_txn, pg, &omp, NULL)) || + if ((rc = mdb_page_get(mc, pg, &omp, NULL)) || (rc = mdb_ovpage_free(mc, omp))) goto fail; } @@ -6877,7 +7749,7 @@ mdb_page_new(MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp) if ((rc = mdb_page_alloc(mc, num, &np))) return rc; - DPRINTF(("allocated new mpage %"Z"u, page size %u", + DPRINTF(("allocated new mpage %"Yu", page size %u", np->mp_pgno, mc->mc_txn->mt_env->me_psize)); np->mp_flags = flags | P_DIRTY; np->mp_lower = (PAGEHDRSZ-PAGEBASE); @@ -6972,11 +7844,12 @@ mdb_node_add(MDB_cursor *mc, indx_t indx, MDB_node *node; MDB_page *mp = mc->mc_pg[mc->mc_top]; MDB_page *ofp = NULL; /* overflow page */ + void *ndata; DKBUF; mdb_cassert(mc, mp->mp_upper >= mp->mp_lower); - DPRINTF(("add to %s %spage %"Z"u index %i, data size %"Z"u key size %"Z"u [%s]", + DPRINTF(("add to %s %spage %"Yu" index %i, data size %"Z"u key size %"Z"u [%s]", IS_LEAF(mp) ? "leaf" : "branch", IS_SUBP(mp) ? "sub-" : "", mdb_dbg_pgno(mp), indx, data ? data->mv_size : 0, @@ -7002,7 +7875,7 @@ mdb_node_add(MDB_cursor *mc, indx_t indx, if (key != NULL) node_size += key->mv_size; if (IS_LEAF(mp)) { - mdb_cassert(mc, data); + mdb_cassert(mc, key && data); if (F_ISSET(flags, F_BIGDATA)) { /* Data already on overflow page. */ node_size += sizeof(pgno_t); @@ -7017,7 +7890,7 @@ mdb_node_add(MDB_cursor *mc, indx_t indx, goto full; if ((rc = mdb_page_new(mc, P_OVERFLOW, ovpages, &ofp))) return rc; - DPRINTF(("allocated overflow page %"Z"u", ofp->mp_pgno)); + DPRINTF(("allocated overflow page %"Yu"", ofp->mp_pgno)); flags |= F_BIGDATA; goto update; } else { @@ -7053,30 +7926,28 @@ update: memcpy(NODEKEY(node), key->mv_data, key->mv_size); if (IS_LEAF(mp)) { - mdb_cassert(mc, key); + ndata = NODEDATA(node); if (ofp == NULL) { if (F_ISSET(flags, F_BIGDATA)) - memcpy(node->mn_data + key->mv_size, data->mv_data, - sizeof(pgno_t)); + memcpy(ndata, data->mv_data, sizeof(pgno_t)); else if (F_ISSET(flags, MDB_RESERVE)) - data->mv_data = node->mn_data + key->mv_size; + data->mv_data = ndata; else - memcpy(node->mn_data + key->mv_size, data->mv_data, - data->mv_size); + memcpy(ndata, data->mv_data, data->mv_size); } else { - memcpy(node->mn_data + key->mv_size, &ofp->mp_pgno, - sizeof(pgno_t)); + memcpy(ndata, &ofp->mp_pgno, sizeof(pgno_t)); + ndata = METADATA(ofp); if (F_ISSET(flags, MDB_RESERVE)) - data->mv_data = METADATA(ofp); + data->mv_data = ndata; else - memcpy(METADATA(ofp), data->mv_data, data->mv_size); + memcpy(ndata, data->mv_data, data->mv_size); } } return MDB_SUCCESS; full: - DPRINTF(("not enough room in page %"Z"u, got %u ptrs", + DPRINTF(("not enough room in page %"Yu", got %u ptrs", mdb_dbg_pgno(mp), NUMKEYS(mp))); DPRINTF(("upper-lower = %u - %u = %"Z"d", mp->mp_upper,mp->mp_lower,room)); DPRINTF(("node size = %"Z"u", node_size)); @@ -7099,7 +7970,7 @@ mdb_node_del(MDB_cursor *mc, int ksize) MDB_node *node; char *base; - DPRINTF(("delete node %u on %s page %"Z"u", indx, + DPRINTF(("delete node %u on %s page %"Yu"", indx, IS_LEAF(mp) ? "leaf" : "branch", mdb_dbg_pgno(mp))); numkeys = NUMKEYS(mp); mdb_cassert(mc, indx < numkeys); @@ -7151,45 +8022,38 @@ mdb_node_shrink(MDB_page *mp, indx_t indx) MDB_node *node; MDB_page *sp, *xp; char *base; - int nsize, delta; - indx_t i, numkeys, ptr; + indx_t delta, nsize, len, ptr; + int i; node = NODEPTR(mp, indx); sp = (MDB_page *)NODEDATA(node); delta = SIZELEFT(sp); - xp = (MDB_page *)((char *)sp + delta); + nsize = NODEDSZ(node) - delta; - /* shift subpage upward */ + /* Prepare to shift upward, set len = length(subpage part to shift) */ if (IS_LEAF2(sp)) { - nsize = NUMKEYS(sp) * sp->mp_pad; + len = nsize; if (nsize & 1) return; /* do not make the node uneven-sized */ - memmove(METADATA(xp), METADATA(sp), nsize); } else { - int i; - numkeys = NUMKEYS(sp); - for (i=numkeys-1; i>=0; i--) + xp = (MDB_page *)((char *)sp + delta); /* destination subpage */ + for (i = NUMKEYS(sp); --i >= 0; ) xp->mp_ptrs[i] = sp->mp_ptrs[i] - delta; + len = PAGEHDRSZ; } - xp->mp_upper = sp->mp_lower; - xp->mp_lower = sp->mp_lower; - xp->mp_flags = sp->mp_flags; - xp->mp_pad = sp->mp_pad; - COPY_PGNO(xp->mp_pgno, mp->mp_pgno); - - nsize = NODEDSZ(node) - delta; + sp->mp_upper = sp->mp_lower; + COPY_PGNO(sp->mp_pgno, mp->mp_pgno); SETDSZ(node, nsize); - /* shift lower nodes upward */ + /* Shift upward */ + base = (char *)mp + mp->mp_upper + PAGEBASE; + memmove(base + delta, base, (char *)sp + len - base); + ptr = mp->mp_ptrs[indx]; - numkeys = NUMKEYS(mp); - for (i = 0; i < numkeys; i++) { + for (i = NUMKEYS(mp); --i >= 0; ) { if (mp->mp_ptrs[i] <= ptr) mp->mp_ptrs[i] += delta; } - - base = (char *)mp + mp->mp_upper + PAGEBASE; - memmove(base + delta, base, ptr - mp->mp_upper + NODESIZE + NODEKSZ(node)); mp->mp_upper += delta; } @@ -7215,7 +8079,10 @@ mdb_xcursor_init0(MDB_cursor *mc) mx->mx_cursor.mc_dbflag = &mx->mx_dbflag; mx->mx_cursor.mc_snum = 0; mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_SUB; +#ifdef MDB_VL32 + mx->mx_cursor.mc_ovpg = 0; +#endif + mx->mx_cursor.mc_flags = C_SUB | (mc->mc_flags & (C_ORIG_RDONLY|C_WRITEMAP)); mx->mx_dbx.md_name.mv_size = 0; mx->mx_dbx.md_name.mv_data = NULL; mx->mx_dbx.md_cmp = mc->mc_dbx->md_dcmp; @@ -7234,15 +8101,15 @@ mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node) { MDB_xcursor *mx = mc->mc_xcursor; + mx->mx_cursor.mc_flags &= C_SUB|C_ORIG_RDONLY|C_WRITEMAP; if (node->mn_flags & F_SUBDATA) { memcpy(&mx->mx_db, NODEDATA(node), sizeof(MDB_db)); mx->mx_cursor.mc_pg[0] = 0; mx->mx_cursor.mc_snum = 0; mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_SUB; } else { MDB_page *fp = NODEDATA(node); - mx->mx_db.md_pad = mc->mc_pg[mc->mc_top]->mp_pad; + mx->mx_db.md_pad = 0; mx->mx_db.md_flags = 0; mx->mx_db.md_depth = 1; mx->mx_db.md_branch_pages = 0; @@ -7252,7 +8119,7 @@ mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node) COPY_PGNO(mx->mx_db.md_root, fp->mp_pgno); mx->mx_cursor.mc_snum = 1; mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_INITIALIZED|C_SUB; + mx->mx_cursor.mc_flags |= C_INITIALIZED; mx->mx_cursor.mc_pg[0] = fp; mx->mx_cursor.mc_ki[0] = 0; if (mc->mc_db->md_flags & MDB_DUPFIXED) { @@ -7262,15 +8129,47 @@ mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node) mx->mx_db.md_flags |= MDB_INTEGERKEY; } } - DPRINTF(("Sub-db -%u root page %"Z"u", mx->mx_cursor.mc_dbi, + DPRINTF(("Sub-db -%u root page %"Yu"", mx->mx_cursor.mc_dbi, mx->mx_db.md_root)); - mx->mx_dbflag = DB_VALID|DB_DIRTY; /* DB_DIRTY guides mdb_cursor_touch */ -#if UINT_MAX < SIZE_MAX - if (mx->mx_dbx.md_cmp == mdb_cmp_int && mx->mx_db.md_pad == sizeof(size_t)) + mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DIRTY; /* DB_DIRTY guides mdb_cursor_touch */ +#if UINT_MAX < SIZE_MAX || defined(MDB_VL32) + if (mx->mx_dbx.md_cmp == mdb_cmp_int && mx->mx_db.md_pad == sizeof(mdb_size_t)) mx->mx_dbx.md_cmp = mdb_cmp_clong; #endif } + +/** Fixup a sorted-dups cursor due to underlying update. + * Sets up some fields that depend on the data from the main cursor. + * Almost the same as init1, but skips initialization steps if the + * xcursor had already been used. + * @param[in] mc The main cursor whose sorted-dups cursor is to be fixed up. + * @param[in] src_mx The xcursor of an up-to-date cursor. + * @param[in] new_dupdata True if converting from a non-#F_DUPDATA item. + */ +static void +mdb_xcursor_init2(MDB_cursor *mc, MDB_xcursor *src_mx, int new_dupdata) +{ + MDB_xcursor *mx = mc->mc_xcursor; + + if (new_dupdata) { + mx->mx_cursor.mc_snum = 1; + mx->mx_cursor.mc_top = 0; + mx->mx_cursor.mc_flags |= C_INITIALIZED; + mx->mx_cursor.mc_ki[0] = 0; + mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DIRTY; /* DB_DIRTY guides mdb_cursor_touch */ +#if UINT_MAX < SIZE_MAX + mx->mx_dbx.md_cmp = src_mx->mx_dbx.md_cmp; +#endif + } else if (!(mx->mx_cursor.mc_flags & C_INITIALIZED)) { + return; + } + mx->mx_db = src_mx->mx_db; + mx->mx_cursor.mc_pg[0] = src_mx->mx_cursor.mc_pg[0]; + DPRINTF(("Sub-db -%u root page %"Yu"", mx->mx_cursor.mc_dbi, + mx->mx_db.md_root)); +} + /** Initialize a cursor for a given transaction and database. */ static void mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx) @@ -7286,7 +8185,10 @@ mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx) mc->mc_top = 0; mc->mc_pg[0] = 0; mc->mc_ki[0] = 0; - mc->mc_flags = 0; +#ifdef MDB_VL32 + mc->mc_ovpg = 0; +#endif + mc->mc_flags = txn->mt_flags & (C_ORIG_RDONLY|C_WRITEMAP); if (txn->mt_dbs[dbi].md_flags & MDB_DUPSORT) { mdb_tassert(txn, mx != NULL); mc->mc_xcursor = mx; @@ -7305,14 +8207,13 @@ mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **ret) MDB_cursor *mc; size_t size = sizeof(MDB_cursor); - if (!ret || !TXN_DBI_EXIST(txn, dbi)) + if (!ret || !TXN_DBI_EXIST(txn, dbi, DB_VALID)) return EINVAL; - if (txn->mt_flags & MDB_TXN_ERROR) + if (txn->mt_flags & MDB_TXN_BLOCKED) return MDB_BAD_TXN; - /* Allow read access to the freelist */ - if (!dbi && !F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) + if (dbi == FREE_DBI && !F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) return EINVAL; if (txn->mt_dbs[dbi].md_flags & MDB_DUPSORT) @@ -7337,13 +8238,13 @@ mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **ret) int mdb_cursor_renew(MDB_txn *txn, MDB_cursor *mc) { - if (!mc || !TXN_DBI_EXIST(txn, mc->mc_dbi)) + if (!mc || !TXN_DBI_EXIST(txn, mc->mc_dbi, DB_VALID)) return EINVAL; if ((mc->mc_flags & C_UNTRACK) || txn->mt_cursors) return EINVAL; - if (txn->mt_flags & MDB_TXN_ERROR) + if (txn->mt_flags & MDB_TXN_BLOCKED) return MDB_BAD_TXN; mdb_cursor_init(mc, txn, mc->mc_dbi, mc->mc_xcursor); @@ -7362,7 +8263,7 @@ mdb_cursor_count(MDB_cursor *mc, size_t *countp) if (mc->mc_xcursor == NULL) return MDB_INCOMPATIBLE; - if (mc->mc_txn->mt_flags & MDB_TXN_ERROR) + if (mc->mc_txn->mt_flags & MDB_TXN_BLOCKED) return MDB_BAD_TXN; if (!(mc->mc_flags & C_INITIALIZED)) @@ -7437,7 +8338,7 @@ mdb_update_key(MDB_cursor *mc, MDB_val *key) char kbuf2[DKBUF_MAXKEYSIZE*2+1]; k2.mv_data = NODEKEY(node); k2.mv_size = node->mn_ksize; - DPRINTF(("update key %u (ofs %u) [%s] to [%s] on page %"Z"u", + DPRINTF(("update key %u (ofs %u) [%s] to [%s] on page %"Yu"", indx, ptr, mdb_dkey(&k2, kbuf2), DKEY(key), @@ -7488,10 +8389,26 @@ mdb_update_key(MDB_cursor *mc, MDB_val *key) static void mdb_cursor_copy(const MDB_cursor *csrc, MDB_cursor *cdst); +/** Perform \b act while tracking temporary cursor \b mn */ +#define WITH_CURSOR_TRACKING(mn, act) do { \ + MDB_cursor dummy, *tracked, **tp = &(mn).mc_txn->mt_cursors[mn.mc_dbi]; \ + if ((mn).mc_flags & C_SUB) { \ + dummy.mc_flags = C_INITIALIZED; \ + dummy.mc_xcursor = (MDB_xcursor *)&(mn); \ + tracked = &dummy; \ + } else { \ + tracked = &(mn); \ + } \ + tracked->mc_next = *tp; \ + *tp = tracked; \ + { act; } \ + *tp = tracked->mc_next; \ +} while (0) + /** Move a node from csrc to cdst. */ static int -mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst) +mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst, int fromleft) { MDB_node *srcnode; MDB_val key, data; @@ -7543,6 +8460,7 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst) data.mv_size = NODEDSZ(srcnode); data.mv_data = NODEDATA(srcnode); } + mn.mc_xcursor = NULL; if (IS_BRANCH(cdst->mc_pg[cdst->mc_top]) && cdst->mc_ki[cdst->mc_top] == 0) { unsigned int snum = cdst->mc_snum; MDB_node *s2; @@ -7568,7 +8486,7 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst) return rc; } - DPRINTF(("moving %s node %u [%s] on page %"Z"u to node %u on page %"Z"u", + DPRINTF(("moving %s node %u [%s] on page %"Yu" to node %u on page %"Yu"", IS_LEAF(csrc->mc_pg[csrc->mc_top]) ? "leaf" : "branch", csrc->mc_ki[csrc->mc_top], DKEY(&key), @@ -7589,18 +8507,64 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst) /* Adjust other cursors pointing to mp */ MDB_cursor *m2, *m3; MDB_dbi dbi = csrc->mc_dbi; - MDB_page *mp = csrc->mc_pg[csrc->mc_top]; - - for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { - if (csrc->mc_flags & C_SUB) - m3 = &m2->mc_xcursor->mx_cursor; - else - m3 = m2; - if (m3 == csrc) continue; - if (m3->mc_pg[csrc->mc_top] == mp && m3->mc_ki[csrc->mc_top] == - csrc->mc_ki[csrc->mc_top]) { - m3->mc_pg[csrc->mc_top] = cdst->mc_pg[cdst->mc_top]; - m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; + MDB_page *mpd, *mps; + + mps = csrc->mc_pg[csrc->mc_top]; + /* If we're adding on the left, bump others up */ + if (fromleft) { + mpd = cdst->mc_pg[csrc->mc_top]; + for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { + if (csrc->mc_flags & C_SUB) + m3 = &m2->mc_xcursor->mx_cursor; + else + m3 = m2; + if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top) + continue; + if (m3 != cdst && + m3->mc_pg[csrc->mc_top] == mpd && + m3->mc_ki[csrc->mc_top] >= cdst->mc_ki[csrc->mc_top]) { + m3->mc_ki[csrc->mc_top]++; + } + if (m3 !=csrc && + m3->mc_pg[csrc->mc_top] == mps && + m3->mc_ki[csrc->mc_top] == csrc->mc_ki[csrc->mc_top]) { + m3->mc_pg[csrc->mc_top] = cdst->mc_pg[cdst->mc_top]; + m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; + m3->mc_ki[csrc->mc_top-1]++; + } + if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) && + IS_LEAF(mps)) { + MDB_node *node = NODEPTR(m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]); + if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) + m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node); + } + } + } else + /* Adding on the right, bump others down */ + { + for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { + if (csrc->mc_flags & C_SUB) + m3 = &m2->mc_xcursor->mx_cursor; + else + m3 = m2; + if (m3 == csrc) continue; + if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top) + continue; + if (m3->mc_pg[csrc->mc_top] == mps) { + if (!m3->mc_ki[csrc->mc_top]) { + m3->mc_pg[csrc->mc_top] = cdst->mc_pg[cdst->mc_top]; + m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; + m3->mc_ki[csrc->mc_top-1]--; + } else { + m3->mc_ki[csrc->mc_top]--; + } + if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) && + IS_LEAF(mps)) { + MDB_node *node = NODEPTR(m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]); + if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) + m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node); + } + } } } } @@ -7616,12 +8580,15 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst) key.mv_size = NODEKSZ(srcnode); key.mv_data = NODEKEY(srcnode); } - DPRINTF(("update separator for source page %"Z"u to [%s]", + DPRINTF(("update separator for source page %"Yu" to [%s]", csrc->mc_pg[csrc->mc_top]->mp_pgno, DKEY(&key))); mdb_cursor_copy(csrc, &mn); mn.mc_snum--; mn.mc_top--; - if ((rc = mdb_update_key(&mn, &key)) != MDB_SUCCESS) + /* We want mdb_rebalance to find mn when doing fixups */ + WITH_CURSOR_TRACKING(mn, + rc = mdb_update_key(&mn, &key)); + if (rc) return rc; } if (IS_BRANCH(csrc->mc_pg[csrc->mc_top])) { @@ -7644,12 +8611,15 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst) key.mv_size = NODEKSZ(srcnode); key.mv_data = NODEKEY(srcnode); } - DPRINTF(("update separator for destination page %"Z"u to [%s]", + DPRINTF(("update separator for destination page %"Yu" to [%s]", cdst->mc_pg[cdst->mc_top]->mp_pgno, DKEY(&key))); mdb_cursor_copy(cdst, &mn); mn.mc_snum--; mn.mc_top--; - if ((rc = mdb_update_key(&mn, &key)) != MDB_SUCCESS) + /* We want mdb_rebalance to find mn when doing fixups */ + WITH_CURSOR_TRACKING(mn, + rc = mdb_update_key(&mn, &key)); + if (rc) return rc; } if (IS_BRANCH(cdst->mc_pg[cdst->mc_top])) { @@ -7687,7 +8657,7 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) psrc = csrc->mc_pg[csrc->mc_top]; pdst = cdst->mc_pg[cdst->mc_top]; - DPRINTF(("merging page %"Z"u into %"Z"u", psrc->mp_pgno, pdst->mp_pgno)); + DPRINTF(("merging page %"Yu" into %"Yu"", psrc->mp_pgno, pdst->mp_pgno)); mdb_cassert(csrc, csrc->mc_snum > 1); /* can't merge root page */ mdb_cassert(csrc, cdst->mc_snum > 1); @@ -7696,6 +8666,9 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) if ((rc = mdb_page_touch(cdst))) return rc; + /* get dst page again now that we've touched it. */ + pdst = cdst->mc_pg[cdst->mc_top]; + /* Move all nodes from src to dst. */ j = nkeys = NUMKEYS(pdst); @@ -7715,6 +8688,7 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) MDB_cursor mn; MDB_node *s2; mdb_cursor_copy(csrc, &mn); + mn.mc_xcursor = NULL; /* must find the lowest key below src */ rc = mdb_page_search_lowest(&mn); if (rc) @@ -7740,7 +8714,7 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) } } - DPRINTF(("dst page %"Z"u now has %u keys (%.1f%% filled)", + DPRINTF(("dst page %"Yu" now has %u keys (%.1f%% filled)", pdst->mp_pgno, NUMKEYS(pdst), (float)PAGEFILL(cdst->mc_txn->mt_env, pdst) / 10)); @@ -7773,6 +8747,7 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) /* Adjust other cursors pointing to mp */ MDB_cursor *m2, *m3; MDB_dbi dbi = csrc->mc_dbi; + unsigned int top = csrc->mc_top; for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { if (csrc->mc_flags & C_SUB) @@ -7781,9 +8756,19 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) m3 = m2; if (m3 == csrc) continue; if (m3->mc_snum < csrc->mc_snum) continue; - if (m3->mc_pg[csrc->mc_top] == psrc) { - m3->mc_pg[csrc->mc_top] = pdst; - m3->mc_ki[csrc->mc_top] += nkeys; + if (m3->mc_pg[top] == psrc) { + m3->mc_pg[top] = pdst; + m3->mc_ki[top] += nkeys; + m3->mc_ki[top-1] = cdst->mc_ki[top-1]; + } else if (m3->mc_pg[top-1] == csrc->mc_pg[top-1] && + m3->mc_ki[top-1] > csrc->mc_ki[top-1]) { + m3->mc_ki[top-1]--; + } + if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) && + IS_LEAF(psrc)) { + MDB_node *node = NODEPTR(m3->mc_pg[top], m3->mc_ki[top]); + if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) + m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node); } } } @@ -7792,9 +8777,9 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) uint16_t depth = cdst->mc_db->md_depth; mdb_cursor_pop(cdst); rc = mdb_rebalance(cdst); - /* Did the tree shrink? */ - if (depth > cdst->mc_db->md_depth) - snum--; + /* Did the tree height change? */ + if (depth != cdst->mc_db->md_depth) + snum += cdst->mc_db->md_depth - depth; cdst->mc_snum = snum; cdst->mc_top = snum-1; } @@ -7817,6 +8802,9 @@ mdb_cursor_copy(const MDB_cursor *csrc, MDB_cursor *cdst) cdst->mc_snum = csrc->mc_snum; cdst->mc_top = csrc->mc_top; cdst->mc_flags = csrc->mc_flags; +#ifdef MDB_VL32 + cdst->mc_ovpg = csrc->mc_ovpg; +#endif for (i=0; imc_snum; i++) { cdst->mc_pg[i] = csrc->mc_pg[i]; @@ -7833,20 +8821,26 @@ static int mdb_rebalance(MDB_cursor *mc) { MDB_node *node; - int rc; - unsigned int ptop, minkeys; + int rc, fromleft; + unsigned int ptop, minkeys, thresh; MDB_cursor mn; indx_t oldki; - minkeys = 1 + (IS_BRANCH(mc->mc_pg[mc->mc_top])); - DPRINTF(("rebalancing %s page %"Z"u (has %u keys, %.1f%% full)", + if (IS_BRANCH(mc->mc_pg[mc->mc_top])) { + minkeys = 2; + thresh = 1; + } else { + minkeys = 1; + thresh = FILL_THRESHOLD; + } + DPRINTF(("rebalancing %s page %"Yu" (has %u keys, %.1f%% full)", IS_LEAF(mc->mc_pg[mc->mc_top]) ? "leaf" : "branch", mdb_dbg_pgno(mc->mc_pg[mc->mc_top]), NUMKEYS(mc->mc_pg[mc->mc_top]), (float)PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) / 10)); - if (PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) >= FILL_THRESHOLD && + if (PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) >= thresh && NUMKEYS(mc->mc_pg[mc->mc_top]) >= minkeys) { - DPRINTF(("no need to rebalance page %"Z"u, above fill threshold", + DPRINTF(("no need to rebalance page %"Yu", above fill threshold", mdb_dbg_pgno(mc->mc_pg[mc->mc_top]))); return MDB_SUCCESS; } @@ -7878,7 +8872,8 @@ mdb_rebalance(MDB_cursor *mc) m3 = &m2->mc_xcursor->mx_cursor; else m3 = m2; - if (m3->mc_snum < mc->mc_snum) continue; + if (!(m3->mc_flags & C_INITIALIZED) || (m3->mc_snum < mc->mc_snum)) + continue; if (m3->mc_pg[0] == mp) { m3->mc_snum = 0; m3->mc_top = 0; @@ -7893,7 +8888,7 @@ mdb_rebalance(MDB_cursor *mc) if (rc) return rc; mc->mc_db->md_root = NODEPGNO(NODEPTR(mp, 0)); - rc = mdb_page_get(mc->mc_txn,mc->mc_db->md_root,&mc->mc_pg[0],NULL); + rc = mdb_page_get(mc, mc->mc_db->md_root, &mc->mc_pg[0], NULL); if (rc) return rc; mc->mc_db->md_depth--; @@ -7913,9 +8908,11 @@ mdb_rebalance(MDB_cursor *mc) m3 = &m2->mc_xcursor->mx_cursor; else m3 = m2; - if (m3 == mc || m3->mc_snum < mc->mc_snum) continue; + if (m3 == mc) continue; + if (!(m3->mc_flags & C_INITIALIZED)) + continue; if (m3->mc_pg[0] == mp) { - for (i=0; imc_snum; i++) { + for (i=0; imc_db->md_depth; i++) { m3->mc_pg[i] = m3->mc_pg[i+1]; m3->mc_ki[i] = m3->mc_ki[i+1]; } @@ -7952,25 +8949,27 @@ mdb_rebalance(MDB_cursor *mc) DPUTS("reading right neighbor"); mn.mc_ki[ptop]++; node = NODEPTR(mc->mc_pg[ptop], mn.mc_ki[ptop]); - rc = mdb_page_get(mc->mc_txn,NODEPGNO(node),&mn.mc_pg[mn.mc_top],NULL); + rc = mdb_page_get(mc, NODEPGNO(node), &mn.mc_pg[mn.mc_top], NULL); if (rc) return rc; mn.mc_ki[mn.mc_top] = 0; mc->mc_ki[mc->mc_top] = NUMKEYS(mc->mc_pg[mc->mc_top]); + fromleft = 0; } else { /* There is at least one neighbor to the left. */ DPUTS("reading left neighbor"); mn.mc_ki[ptop]--; node = NODEPTR(mc->mc_pg[ptop], mn.mc_ki[ptop]); - rc = mdb_page_get(mc->mc_txn,NODEPGNO(node),&mn.mc_pg[mn.mc_top],NULL); + rc = mdb_page_get(mc, NODEPGNO(node), &mn.mc_pg[mn.mc_top], NULL); if (rc) return rc; mn.mc_ki[mn.mc_top] = NUMKEYS(mn.mc_pg[mn.mc_top]) - 1; mc->mc_ki[mc->mc_top] = 0; + fromleft = 1; } - DPRINTF(("found neighbor page %"Z"u (%u keys, %.1f%% full)", + DPRINTF(("found neighbor page %"Yu" (%u keys, %.1f%% full)", mn.mc_pg[mn.mc_top]->mp_pgno, NUMKEYS(mn.mc_pg[mn.mc_top]), (float)PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) / 10)); @@ -7978,33 +8977,21 @@ mdb_rebalance(MDB_cursor *mc) * move one key from it. Otherwise we should try to merge them. * (A branch page must never have less than 2 keys.) */ - minkeys = 1 + (IS_BRANCH(mn.mc_pg[mn.mc_top])); - if (PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) >= FILL_THRESHOLD && NUMKEYS(mn.mc_pg[mn.mc_top]) > minkeys) { - rc = mdb_node_move(&mn, mc); - if (mc->mc_ki[ptop]) { + if (PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) >= thresh && NUMKEYS(mn.mc_pg[mn.mc_top]) > minkeys) { + rc = mdb_node_move(&mn, mc, fromleft); + if (fromleft) { + /* if we inserted on left, bump position up */ oldki++; } } else { - if (mc->mc_ki[ptop] == 0) { + if (!fromleft) { rc = mdb_page_merge(&mn, mc); } else { - MDB_cursor dummy; oldki += NUMKEYS(mn.mc_pg[mn.mc_top]); mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1; /* We want mdb_rebalance to find mn when doing fixups */ - if (mc->mc_flags & C_SUB) { - dummy.mc_next = mc->mc_txn->mt_cursors[mc->mc_dbi]; - mc->mc_txn->mt_cursors[mc->mc_dbi] = &dummy; - dummy.mc_xcursor = (MDB_xcursor *)&mn; - } else { - mn.mc_next = mc->mc_txn->mt_cursors[mc->mc_dbi]; - mc->mc_txn->mt_cursors[mc->mc_dbi] = &mn; - } - rc = mdb_page_merge(mc, &mn); - if (mc->mc_flags & C_SUB) - mc->mc_txn->mt_cursors[mc->mc_dbi] = dummy.mc_next; - else - mc->mc_txn->mt_cursors[mc->mc_dbi] = mn.mc_next; + WITH_CURSOR_TRACKING(mn, + rc = mdb_page_merge(mc, &mn)); mdb_cursor_copy(&mn, mc); } mc->mc_flags &= ~C_EOF; @@ -8021,16 +9008,40 @@ mdb_cursor_del0(MDB_cursor *mc) MDB_page *mp; indx_t ki; unsigned int nkeys; + MDB_cursor *m2, *m3; + MDB_dbi dbi = mc->mc_dbi; ki = mc->mc_ki[mc->mc_top]; + mp = mc->mc_pg[mc->mc_top]; mdb_node_del(mc, mc->mc_db->md_pad); mc->mc_db->md_entries--; + { + /* Adjust other cursors pointing to mp */ + for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { + m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (! (m2->mc_flags & m3->mc_flags & C_INITIALIZED)) + continue; + if (m3 == mc || m3->mc_snum < mc->mc_snum) + continue; + if (m3->mc_pg[mc->mc_top] == mp) { + if (m3->mc_ki[mc->mc_top] == ki) { + m3->mc_flags |= C_DEL; + if (mc->mc_db->md_flags & MDB_DUPSORT) + m3->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED; + } else if (m3->mc_ki[mc->mc_top] > ki) { + m3->mc_ki[mc->mc_top]--; + } + if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) { + MDB_node *node = NODEPTR(m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]); + if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) + m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node); + } + } + } + } rc = mdb_rebalance(mc); if (rc == MDB_SUCCESS) { - MDB_cursor *m2, *m3; - MDB_dbi dbi = mc->mc_dbi; - /* DB is totally empty now, just bail out. * Other cursors adjustments were already done * by mdb_rebalance and aren't needed here. @@ -8041,30 +9052,15 @@ mdb_cursor_del0(MDB_cursor *mc) mp = mc->mc_pg[mc->mc_top]; nkeys = NUMKEYS(mp); - /* if mc points past last node in page, find next sibling */ - if (mc->mc_ki[mc->mc_top] >= nkeys) { - rc = mdb_cursor_sibling(mc, 1); - if (rc == MDB_NOTFOUND) { - mc->mc_flags |= C_EOF; - rc = MDB_SUCCESS; - } - } - /* Adjust other cursors pointing to mp */ for (m2 = mc->mc_txn->mt_cursors[dbi]; !rc && m2; m2=m2->mc_next) { m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; if (! (m2->mc_flags & m3->mc_flags & C_INITIALIZED)) continue; - if (m3 == mc || m3->mc_snum < mc->mc_snum) + if (m3->mc_snum < mc->mc_snum) continue; if (m3->mc_pg[mc->mc_top] == mp) { - if (m3->mc_ki[mc->mc_top] >= ki) { - m3->mc_flags |= C_DEL; - if (m3->mc_ki[mc->mc_top] > ki) - m3->mc_ki[mc->mc_top]--; - else if (mc->mc_db->md_flags & MDB_DUPSORT) - m3->mc_xcursor->mx_cursor.mc_flags |= C_EOF; - } + /* if m3 points past last node in page, find next sibling */ if (m3->mc_ki[mc->mc_top] >= nkeys) { rc = mdb_cursor_sibling(m3, 1); if (rc == MDB_NOTFOUND) { @@ -8086,10 +9082,10 @@ int mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data) { - if (!key || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!key || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; - if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) + if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED)) return (txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN; if (!F_ISSET(txn->mt_dbs[dbi].md_flags, MDB_DUPSORT)) { @@ -8175,27 +9171,34 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno newindx = mc->mc_ki[mc->mc_top]; nkeys = NUMKEYS(mp); - DPRINTF(("-----> splitting %s page %"Z"u and adding [%s] at index %i/%i", + DPRINTF(("-----> splitting %s page %"Yu" and adding [%s] at index %i/%i", IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno, DKEY(newkey), mc->mc_ki[mc->mc_top], nkeys)); /* Create a right sibling. */ if ((rc = mdb_page_new(mc, mp->mp_flags, 1, &rp))) return rc; - DPRINTF(("new right sibling: page %"Z"u", rp->mp_pgno)); + rp->mp_pad = mp->mp_pad; + DPRINTF(("new right sibling: page %"Yu"", rp->mp_pgno)); - if (mc->mc_snum < 2) { + /* Usually when splitting the root page, the cursor + * height is 1. But when called from mdb_update_key, + * the cursor height may be greater because it walks + * up the stack while finding the branch slot to update. + */ + if (mc->mc_top < 1) { if ((rc = mdb_page_new(mc, P_BRANCH, 1, &pp))) goto done; /* shift current top to make room for new parent */ - mc->mc_pg[1] = mc->mc_pg[0]; - mc->mc_ki[1] = mc->mc_ki[0]; + for (i=mc->mc_snum; i>0; i--) { + mc->mc_pg[i] = mc->mc_pg[i-1]; + mc->mc_ki[i] = mc->mc_ki[i-1]; + } mc->mc_pg[0] = pp; mc->mc_ki[0] = 0; mc->mc_db->md_root = pp->mp_pgno; - DPRINTF(("root split! new root = %"Z"u", pp->mp_pgno)); - mc->mc_db->md_depth++; - new_root = 1; + DPRINTF(("root split! new root = %"Yu"", pp->mp_pgno)); + new_root = mc->mc_db->md_depth++; /* Add left (implicit) pointer. */ if ((rc = mdb_node_add(mc, 0, NULL, NULL, mp->mp_pgno, 0)) != MDB_SUCCESS) { @@ -8206,16 +9209,16 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno mc->mc_db->md_depth--; goto done; } - mc->mc_snum = 2; - mc->mc_top = 1; + mc->mc_snum++; + mc->mc_top++; ptop = 0; } else { ptop = mc->mc_top-1; - DPRINTF(("parent branch page is %"Z"u", mc->mc_pg[ptop]->mp_pgno)); + DPRINTF(("parent branch page is %"Yu"", mc->mc_pg[ptop]->mp_pgno)); } - mc->mc_flags |= C_SPLITTING; mdb_cursor_copy(mc, &mn); + mn.mc_xcursor = NULL; mn.mc_pg[mn.mc_top] = rp; mn.mc_ki[ptop] = mc->mc_ki[ptop]+1; @@ -8265,7 +9268,6 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno rp->mp_lower += sizeof(indx_t); rp->mp_upper -= ksize - sizeof(indx_t); mc->mc_ki[mc->mc_top] = x; - mc->mc_pg[mc->mc_top] = rp; } } else { int psize, nsize, k; @@ -8316,7 +9318,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno psize = 0; if (newindx <= split_indx || newindx >= nkeys) { i = 0; j = 1; - k = newindx >= nkeys ? nkeys : split_indx+2; + k = newindx >= nkeys ? nkeys : split_indx+1+IS_LEAF(mp); } else { i = nkeys; j = -1; k = split_indx-1; @@ -8358,21 +9360,18 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno /* Copy separator key to the parent. */ if (SIZELEFT(mn.mc_pg[ptop]) < mdb_branch_size(env, &sepkey)) { + int snum = mc->mc_snum; mn.mc_snum--; mn.mc_top--; did_split = 1; - rc = mdb_page_split(&mn, &sepkey, NULL, rp->mp_pgno, 0); + /* We want other splits to find mn when doing fixups */ + WITH_CURSOR_TRACKING(mn, + rc = mdb_page_split(&mn, &sepkey, NULL, rp->mp_pgno, 0)); if (rc) goto done; /* root split? */ - if (mn.mc_snum == mc->mc_snum) { - mc->mc_pg[mc->mc_snum] = mc->mc_pg[mc->mc_top]; - mc->mc_ki[mc->mc_snum] = mc->mc_ki[mc->mc_top]; - mc->mc_pg[mc->mc_top] = mc->mc_pg[ptop]; - mc->mc_ki[mc->mc_top] = mc->mc_ki[ptop]; - mc->mc_snum++; - mc->mc_top++; + if (mc->mc_snum > snum) { ptop++; } /* Right page might now have changed parent. @@ -8398,7 +9397,6 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno rc = mdb_node_add(&mn, mn.mc_ki[ptop], &sepkey, NULL, rp->mp_pgno, 0); mn.mc_top++; } - mc->mc_flags ^= C_SPLITTING; if (rc != MDB_SUCCESS) { goto done; } @@ -8468,11 +9466,6 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno /* reset back to original page */ if (newindx < split_indx) { mc->mc_pg[mc->mc_top] = mp; - if (nflags & MDB_RESERVE) { - node = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - if (!(node->mn_flags & F_BIGDATA)) - newdata->mv_data = NODEDATA(node); - } } else { mc->mc_pg[mc->mc_top] = rp; mc->mc_ki[ptop]++; @@ -8486,13 +9479,32 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno } } } + if (nflags & MDB_RESERVE) { + node = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (!(node->mn_flags & F_BIGDATA)) + newdata->mv_data = NODEDATA(node); + } + } else { + if (newindx >= split_indx) { + mc->mc_pg[mc->mc_top] = rp; + mc->mc_ki[ptop]++; + /* Make sure mc_ki is still valid. + */ + if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && + mc->mc_ki[ptop] >= NUMKEYS(mc->mc_pg[ptop])) { + for (i=0; i<=ptop; i++) { + mc->mc_pg[i] = mn.mc_pg[i]; + mc->mc_ki[i] = mn.mc_ki[i]; + } + } + } } { /* Adjust other cursors pointing to mp */ MDB_cursor *m2, *m3; MDB_dbi dbi = mc->mc_dbi; - int fixup = NUMKEYS(mp); + nkeys = NUMKEYS(mp); for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { if (mc->mc_flags & C_SUB) @@ -8503,16 +9515,17 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno continue; if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) continue; - if (m3->mc_flags & C_SPLITTING) - continue; if (new_root) { int k; + /* sub cursors may be on different DB */ + if (m3->mc_pg[0] != mp) + continue; /* root split */ - for (k=m3->mc_top; k>=0; k--) { + for (k=new_root; k>=0; k--) { m3->mc_ki[k+1] = m3->mc_ki[k]; m3->mc_pg[k+1] = m3->mc_pg[k]; } - if (m3->mc_ki[0] >= split_indx) { + if (m3->mc_ki[0] >= nkeys) { m3->mc_ki[0] = 1; } else { m3->mc_ki[0] = 0; @@ -8524,15 +9537,24 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno if (m3->mc_top >= mc->mc_top && m3->mc_pg[mc->mc_top] == mp) { if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDB_SPLIT_REPLACE)) m3->mc_ki[mc->mc_top]++; - if (m3->mc_ki[mc->mc_top] >= fixup) { + if (m3->mc_ki[mc->mc_top] >= nkeys) { m3->mc_pg[mc->mc_top] = rp; - m3->mc_ki[mc->mc_top] -= fixup; - m3->mc_ki[ptop] = mn.mc_ki[ptop]; + m3->mc_ki[mc->mc_top] -= nkeys; + for (i=0; imc_top; i++) { + m3->mc_ki[i] = mn.mc_ki[i]; + m3->mc_pg[i] = mn.mc_pg[i]; + } } } else if (!did_split && m3->mc_top >= ptop && m3->mc_pg[ptop] == mc->mc_pg[ptop] && m3->mc_ki[ptop] >= mc->mc_ki[ptop]) { m3->mc_ki[ptop]++; } + if (m3->mc_xcursor && (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) && + IS_LEAF(mp)) { + MDB_node *node = NODEPTR(m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]); + if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) + m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node); + } } } DPRINTF(("mp left: %d, rp left: %d", SIZELEFT(mp), SIZELEFT(rp))); @@ -8551,15 +9573,23 @@ mdb_put(MDB_txn *txn, MDB_dbi dbi, { MDB_cursor mc; MDB_xcursor mx; + int rc; - if (!key || !data || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!key || !data || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; - if ((flags & (MDB_NOOVERWRITE|MDB_NODUPDATA|MDB_RESERVE|MDB_APPEND|MDB_APPENDDUP)) != flags) + if (flags & ~(MDB_NOOVERWRITE|MDB_NODUPDATA|MDB_RESERVE|MDB_APPEND|MDB_APPENDDUP)) return EINVAL; + if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED)) + return (txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN; + mdb_cursor_init(&mc, txn, dbi, &mx); - return mdb_cursor_put(&mc, key, data, flags); + mc.mc_next = txn->mt_cursors[dbi]; + txn->mt_cursors[dbi] = &mc; + rc = mdb_cursor_put(&mc, key, data, flags); + txn->mt_cursors[dbi] = mc.mc_next; + return rc; } #ifndef MDB_WBUF @@ -8585,7 +9615,7 @@ typedef struct mdb_copy { } mdb_copy; /** Dedicated writer thread for compacting copy. */ -static THREAD_RET ESECT +static THREAD_RET ESECT CALL_CONV mdb_env_copythr(void *arg) { mdb_copy *my = arg; @@ -8673,7 +9703,6 @@ static int ESECT mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags) { MDB_cursor mc; - MDB_txn *txn = my->mc_txn; MDB_node *ni; MDB_page *mo, *mp, *leaf; char *buf, *ptr; @@ -8686,9 +9715,9 @@ mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags) mc.mc_snum = 1; mc.mc_top = 0; - mc.mc_txn = txn; + mc.mc_txn = my->mc_txn; - rc = mdb_page_get(my->mc_txn, *pg, &mc.mc_pg[0], NULL); + rc = mdb_page_get(&mc, *pg, &mc.mc_pg[0], NULL); if (rc) return rc; rc = mdb_page_search_root(&mc, NULL, MDB_PS_FIRST); @@ -8732,7 +9761,7 @@ mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags) } memcpy(&pg, NODEDATA(ni), sizeof(pg)); - rc = mdb_page_get(txn, pg, &omp, NULL); + rc = mdb_page_get(&mc, pg, &omp, NULL); if (rc) goto done; if (my->mc_wlen[toggle] >= MDB_WBUF) { @@ -8783,7 +9812,7 @@ mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags) again: ni = NODEPTR(mp, mc.mc_ki[mc.mc_top]); pg = NODEPGNO(ni); - rc = mdb_page_get(txn, pg, &mp, NULL); + rc = mdb_page_get(&mc, pg, &mp, NULL); if (rc) goto done; mc.mc_top++; @@ -8862,7 +9891,7 @@ mdb_env_copyfd1(MDB_env *env, HANDLE fd) my.mc_wlen[1] = 0; my.mc_olen[0] = 0; my.mc_olen[1] = 0; - my.mc_next_pgno = 2; + my.mc_next_pgno = NUM_METAS; my.mc_status = 0; my.mc_new = 1; my.mc_toggle = 0; @@ -8875,7 +9904,7 @@ mdb_env_copyfd1(MDB_env *env, HANDLE fd) return rc; mp = (MDB_page *)my.mc_wbuf[0]; - memset(mp, 0, 2*env->me_psize); + memset(mp, 0, NUM_METAS * env->me_psize); mp->mp_pgno = 0; mp->mp_flags = P_META; mm = (MDB_meta *)METADATA(mp); @@ -8898,27 +9927,27 @@ mdb_env_copyfd1(MDB_env *env, HANDLE fd) mdb_cursor_init(&mc, txn, FREE_DBI, NULL); while ((rc = mdb_cursor_get(&mc, &key, &data, MDB_NEXT)) == 0) freecount += *(MDB_ID *)data.mv_data; - freecount += txn->mt_dbs[0].md_branch_pages + - txn->mt_dbs[0].md_leaf_pages + - txn->mt_dbs[0].md_overflow_pages; + freecount += txn->mt_dbs[FREE_DBI].md_branch_pages + + txn->mt_dbs[FREE_DBI].md_leaf_pages + + txn->mt_dbs[FREE_DBI].md_overflow_pages; /* Set metapage 1 */ mm->mm_last_pg = txn->mt_next_pgno - freecount - 1; - mm->mm_dbs[1] = txn->mt_dbs[1]; - if (mm->mm_last_pg > 1) { - mm->mm_dbs[1].md_root = mm->mm_last_pg; + mm->mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI]; + if (mm->mm_last_pg > NUM_METAS-1) { + mm->mm_dbs[MAIN_DBI].md_root = mm->mm_last_pg; mm->mm_txnid = 1; } else { - mm->mm_dbs[1].md_root = P_INVALID; + mm->mm_dbs[MAIN_DBI].md_root = P_INVALID; } } - my.mc_wlen[0] = env->me_psize * 2; + my.mc_wlen[0] = env->me_psize * NUM_METAS; my.mc_txn = txn; pthread_mutex_lock(&my.mc_mutex); while(my.mc_new) pthread_cond_wait(&my.mc_cond, &my.mc_mutex); pthread_mutex_unlock(&my.mc_mutex); - rc = mdb_env_cwalk(&my, &txn->mt_dbs[1].md_root, 0); + rc = mdb_env_cwalk(&my, &txn->mt_dbs[MAIN_DBI].md_root, 0); if (rc == MDB_SUCCESS && my.mc_wlen[my.mc_toggle]) rc = mdb_env_cthr_toggle(&my, 1); mdb_env_cthr_toggle(&my, -1); @@ -8946,6 +9975,7 @@ static int ESECT mdb_env_copyfd0(MDB_env *env, HANDLE fd) { MDB_txn *txn = NULL; + mdb_mutexref_t wmutex = NULL; int rc; size_t wsize; char *ptr; @@ -8967,19 +9997,21 @@ mdb_env_copyfd0(MDB_env *env, HANDLE fd) if (env->me_txns) { /* We must start the actual read txn after blocking writers */ - mdb_txn_reset0(txn, "reset-stage1"); + mdb_txn_end(txn, MDB_END_RESET_TMP); /* Temporarily block writers until we snapshot the meta pages */ - LOCK_MUTEX_W(env); + wmutex = env->me_wmutex; + if (LOCK_MUTEX(rc, env, wmutex)) + goto leave; rc = mdb_txn_renew0(txn); if (rc) { - UNLOCK_MUTEX_W(env); + UNLOCK_MUTEX(wmutex); goto leave; } } - wsize = env->me_psize * 2; + wsize = env->me_psize * NUM_METAS; ptr = env->me_map; w2 = wsize; while (w2 > 0) { @@ -8998,15 +10030,15 @@ mdb_env_copyfd0(MDB_env *env, HANDLE fd) break; } } - if (env->me_txns) - UNLOCK_MUTEX_W(env); + if (wmutex) + UNLOCK_MUTEX(wmutex); if (rc) goto leave; w2 = txn->mt_next_pgno * env->me_psize; { - size_t fsize = 0; + mdb_size_t fsize = 0; if ((rc = mdb_fsize(env->me_fd, &fsize))) goto leave; if (w2 > fsize) @@ -9059,6 +10091,9 @@ mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags) int rc, len; char *lpath; HANDLE newfd = INVALID_HANDLE_VALUE; +#ifdef _WIN32 + wchar_t *wpath; +#endif if (env->me_flags & MDB_NOSUBDIR) { lpath = (char *)path; @@ -9076,8 +10111,12 @@ mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags) * already in the OS cache. */ #ifdef _WIN32 - newfd = CreateFile(lpath, GENERIC_WRITE, 0, NULL, CREATE_NEW, + rc = utf8_to_utf16(lpath, -1, &wpath, NULL); + if (rc) + return rc; + newfd = CreateFileW(wpath, GENERIC_WRITE, 0, NULL, CREATE_NEW, FILE_FLAG_NO_BUFFERING|FILE_FLAG_WRITE_THROUGH, NULL); + free(wpath); #else newfd = open(lpath, O_WRONLY|O_CREAT|O_EXCL, 0666); #endif @@ -9122,7 +10161,7 @@ mdb_env_copy(MDB_env *env, const char *path) int ESECT mdb_env_set_flags(MDB_env *env, unsigned int flag, int onoff) { - if ((flag & CHANGEABLE) != flag) + if (flag & ~CHANGEABLE) return EINVAL; if (onoff) env->me_flags |= flag; @@ -9137,7 +10176,7 @@ mdb_env_get_flags(MDB_env *env, unsigned int *arg) if (!env || !arg) return EINVAL; - *arg = env->me_flags; + *arg = env->me_flags & (CHANGEABLE|CHANGELESS); return MDB_SUCCESS; } @@ -9209,36 +10248,32 @@ mdb_stat0(MDB_env *env, MDB_db *db, MDB_stat *arg) int ESECT mdb_env_stat(MDB_env *env, MDB_stat *arg) { - int toggle; + MDB_meta *meta; if (env == NULL || arg == NULL) return EINVAL; - toggle = mdb_env_pick_meta(env); + meta = mdb_env_pick_meta(env); - return mdb_stat0(env, &env->me_metas[toggle]->mm_dbs[MAIN_DBI], arg); + return mdb_stat0(env, &meta->mm_dbs[MAIN_DBI], arg); } int ESECT mdb_env_info(MDB_env *env, MDB_envinfo *arg) { - int toggle; + MDB_meta *meta; if (env == NULL || arg == NULL) return EINVAL; - toggle = mdb_env_pick_meta(env); - arg->me_mapaddr = env->me_metas[toggle]->mm_address; + meta = mdb_env_pick_meta(env); + arg->me_mapaddr = meta->mm_address; + arg->me_last_pgno = meta->mm_last_pg; + arg->me_last_txnid = meta->mm_txnid; + arg->me_mapsize = env->me_mapsize; arg->me_maxreaders = env->me_maxreaders; - - /* me_numreaders may be zero if this process never used any readers. Use - * the shared numreader count if it exists. - */ - arg->me_numreaders = env->me_txns ? env->me_txns->mti_numreaders : env->me_numreaders; - - arg->me_last_pgno = env->me_metas[toggle]->mm_last_pg; - arg->me_last_txnid = env->me_metas[toggle]->mm_txnid; + arg->me_numreaders = env->me_txns ? env->me_txns->mti_numreaders : 0; return MDB_SUCCESS; } @@ -9273,15 +10308,12 @@ int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *db MDB_db dummy; int rc, dbflag, exact; unsigned int unused = 0, seq; + char *namedup; size_t len; - if (txn->mt_dbxs[FREE_DBI].md_cmp == NULL) { - mdb_default_cmp(txn, FREE_DBI); - } - - if ((flags & VALID_FLAGS) != flags) + if (flags & ~VALID_FLAGS) return EINVAL; - if (txn->mt_flags & MDB_TXN_ERROR) + if (txn->mt_flags & MDB_TXN_BLOCKED) return MDB_BAD_TXN; /* main DB? */ @@ -9305,7 +10337,7 @@ int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *db /* Is the DB already open? */ len = strlen(name); - for (i=2; imt_numdbs; i++) { + for (i=CORE_DBS; imt_numdbs; i++) { if (!txn->mt_dbxs[i].md_name.mv_size) { /* Remember this free slot */ if (!unused) unused = i; @@ -9327,7 +10359,7 @@ int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *db return (flags & MDB_CREATE) ? MDB_INCOMPATIBLE : MDB_NOTFOUND; /* Find the DB info */ - dbflag = DB_NEW|DB_VALID; + dbflag = DB_NEW|DB_VALID|DB_USRVALID; exact = 0; key.mv_size = len; key.mv_data = (void *)name; @@ -9336,10 +10368,18 @@ int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *db if (rc == MDB_SUCCESS) { /* make sure this is actually a DB */ MDB_node *node = NODEPTR(mc.mc_pg[mc.mc_top], mc.mc_ki[mc.mc_top]); - if (!(node->mn_flags & F_SUBDATA)) + if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) != F_SUBDATA) return MDB_INCOMPATIBLE; - } else if (rc == MDB_NOTFOUND && (flags & MDB_CREATE)) { - /* Create if requested */ + } else if (! (rc == MDB_NOTFOUND && (flags & MDB_CREATE))) { + return rc; + } + + /* Done here so we cannot fail after creating a new DB */ + if ((namedup = strdup(name)) == NULL) + return ENOMEM; + + if (rc) { + /* MDB_NOTFOUND and MDB_CREATE: Create new DB */ data.mv_size = sizeof(MDB_db); data.mv_data = &dummy; memset(&dummy, 0, sizeof(dummy)); @@ -9349,10 +10389,12 @@ int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *db dbflag |= DB_DIRTY; } - /* OK, got info, add to table */ - if (rc == MDB_SUCCESS) { + if (rc) { + free(namedup); + } else { + /* Got info, register DBI in this txn */ unsigned int slot = unused ? unused : txn->mt_numdbs; - txn->mt_dbxs[slot].md_name.mv_data = strdup(name); + txn->mt_dbxs[slot].md_name.mv_data = namedup; txn->mt_dbxs[slot].md_name.mv_size = len; txn->mt_dbxs[slot].md_rel = NULL; txn->mt_dbflags[slot] = dbflag; @@ -9373,12 +10415,13 @@ int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *db return rc; } -int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *arg) +int ESECT +mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *arg) { - if (!arg || !TXN_DBI_EXIST(txn, dbi)) + if (!arg || !TXN_DBI_EXIST(txn, dbi, DB_VALID)) return EINVAL; - if (txn->mt_flags & MDB_TXN_ERROR) + if (txn->mt_flags & MDB_TXN_BLOCKED) return MDB_BAD_TXN; if (txn->mt_dbflags[dbi] & DB_STALE) { @@ -9393,7 +10436,7 @@ int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *arg) void mdb_dbi_close(MDB_env *env, MDB_dbi dbi) { char *ptr; - if (dbi <= MAIN_DBI || dbi >= env->me_maxdbs) + if (dbi < CORE_DBS || dbi >= env->me_maxdbs) return; ptr = env->me_dbxs[dbi].md_name.mv_data; /* If there was no name, this was already closed */ @@ -9409,7 +10452,7 @@ void mdb_dbi_close(MDB_env *env, MDB_dbi dbi) int mdb_dbi_flags(MDB_txn *txn, MDB_dbi dbi, unsigned int *flags) { /* We could return the flags for the FREE_DBI too but what's the point? */ - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; *flags = txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS; return MDB_SUCCESS; @@ -9432,11 +10475,18 @@ mdb_drop0(MDB_cursor *mc, int subs) MDB_cursor mx; unsigned int i; - /* LEAF2 pages have no nodes, cannot have sub-DBs */ - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) + /* DUPSORT sub-DBs have no ovpages/DBs. Omit scanning leaves. + * This also avoids any P_LEAF2 pages, which have no nodes. + */ + if (mc->mc_flags & C_SUB) mdb_cursor_pop(mc); mdb_cursor_copy(mc, &mx); +#ifdef MDB_VL32 + /* bump refcount for mx's pages */ + for (i=0; imc_snum; i++) + mdb_page_get(&mx, mc->mc_pg[i]->mp_pgno, &mx.mc_pg[i], NULL); +#endif while (mc->mc_snum > 0) { MDB_page *mp = mc->mc_pg[mc->mc_top]; unsigned n = NUMKEYS(mp); @@ -9447,7 +10497,7 @@ mdb_drop0(MDB_cursor *mc, int subs) MDB_page *omp; pgno_t pg; memcpy(&pg, NODEDATA(ni), sizeof(pg)); - rc = mdb_page_get(txn, pg, &omp, NULL); + rc = mdb_page_get(mc, pg, &omp, NULL); if (rc != 0) goto done; mdb_cassert(mc, IS_OVERFLOW(omp)); @@ -9496,9 +10546,14 @@ mdb_drop0(MDB_cursor *mc, int subs) done: if (rc) txn->mt_flags |= MDB_TXN_ERROR; +#ifdef MDB_VL32 + /* drop refcount for mx's pages */ + mdb_cursor_unref(&mx); +#endif } else if (rc == MDB_NOTFOUND) { rc = MDB_SUCCESS; } + mc->mc_flags &= ~C_INITIALIZED; return rc; } @@ -9507,13 +10562,13 @@ int mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del) MDB_cursor *mc, *m2; int rc; - if ((unsigned)del > 1 || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if ((unsigned)del > 1 || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) return EACCES; - if (dbi > MAIN_DBI && TXN_DBI_CHANGED(txn, dbi)) + if (TXN_DBI_CHANGED(txn, dbi)) return MDB_BAD_DBI; rc = mdb_cursor_open(txn, dbi, &mc); @@ -9528,8 +10583,8 @@ int mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del) goto leave; /* Can't delete the main DB */ - if (del && dbi > MAIN_DBI) { - rc = mdb_del0(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL, 0); + if (del && dbi >= CORE_DBS) { + rc = mdb_del0(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL, F_SUBDATA); if (!rc) { txn->mt_dbflags[dbi] = DB_STALE; mdb_dbi_close(txn->mt_env, dbi); @@ -9555,7 +10610,7 @@ leave: int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) { - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; txn->mt_dbxs[dbi].md_cmp = cmp; @@ -9564,7 +10619,7 @@ int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) { - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; txn->mt_dbxs[dbi].md_dcmp = cmp; @@ -9573,7 +10628,7 @@ int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel) { - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; txn->mt_dbxs[dbi].md_rel = rel; @@ -9582,7 +10637,7 @@ int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel) int mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx) { - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) + if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID)) return EINVAL; txn->mt_dbxs[dbi].md_relctx = ctx; @@ -9614,7 +10669,7 @@ mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx) if (mr[i].mr_pid) { txnid_t txnid = mr[i].mr_txnid; sprintf(buf, txnid == (txnid_t)-1 ? - "%10d %"Z"x -\n" : "%10d %"Z"x %"Z"u\n", + "%10d %"Z"x -\n" : "%10d %"Z"x %"Yu"\n", (int)mr[i].mr_pid, (size_t)mr[i].mr_tid, txnid); if (first) { first = 0; @@ -9676,17 +10731,23 @@ mdb_pid_insert(MDB_PID_T *ids, MDB_PID_T pid) int ESECT mdb_reader_check(MDB_env *env, int *dead) { - unsigned int i, j, rdrs; - MDB_reader *mr; - MDB_PID_T *pids, pid; - int count = 0; - if (!env) return EINVAL; if (dead) *dead = 0; - if (!env->me_txns) - return MDB_SUCCESS; + return env->me_txns ? mdb_reader_check0(env, 0, dead) : MDB_SUCCESS; +} + +/** As #mdb_reader_check(). rlocked = . */ +static int ESECT +mdb_reader_check0(MDB_env *env, int rlocked, int *dead) +{ + mdb_mutexref_t rmutex = rlocked ? NULL : env->me_rmutex; + unsigned int i, j, rdrs; + MDB_reader *mr; + MDB_PID_T *pids, pid; + int rc = MDB_SUCCESS, count = 0; + rdrs = env->me_txns->mti_numreaders; pids = malloc((rdrs+1) * sizeof(MDB_PID_T)); if (!pids) @@ -9694,22 +10755,32 @@ mdb_reader_check(MDB_env *env, int *dead) pids[0] = 0; mr = env->me_txns->mti_readers; for (i=0; ime_pid) { - pid = mr[i].mr_pid; + pid = mr[i].mr_pid; + if (pid && pid != env->me_pid) { if (mdb_pid_insert(pids, pid) == 0) { if (!mdb_reader_pid(env, Pidcheck, pid)) { - LOCK_MUTEX_R(env); - /* Recheck, a new process may have reused pid */ - if (!mdb_reader_pid(env, Pidcheck, pid)) { - for (j=i; jme_rmutex); + if (!rlocked) { + /* Keep mti_txnid updated, otherwise next writer can + * overwrite data which latest meta page refers to. + */ + meta = mdb_env_pick_meta(env); + env->me_txns->mti_txnid = meta->mm_txnid; + /* env is hosed if the dead thread was ours */ + if (env->me_txn) { + env->me_flags |= MDB_FATAL_ERROR; + env->me_txn = NULL; + rc = MDB_PANIC; + } + } + DPRINTF(("%cmutex owner died, %s", (rlocked ? 'r' : 'w'), + (rc ? "this process' env is hosed" : "recovering"))); + rc2 = mdb_reader_check0(env, rlocked, NULL); + if (rc2 == 0) + rc2 = mdb_mutex_consistent(mutex); + if (rc || (rc = rc2)) { + DPRINTF(("LOCK_MUTEX recovery failed, %s", mdb_strerror(rc))); + UNLOCK_MUTEX(mutex); + } + } else { +#ifdef _WIN32 + rc = ErrCode(); +#endif + DPRINTF(("LOCK_MUTEX failed, %s", mdb_strerror(rc))); + } + + return rc; } +#endif /* MDB_ROBUST_SUPPORTED */ /** @} */ + +#if defined(_WIN32) +static int utf8_to_utf16(const char *src, int srcsize, wchar_t **dst, int *dstsize) +{ + int need; + wchar_t *result; + need = MultiByteToWideChar(CP_UTF8, 0, src, srcsize, NULL, 0); + if (need == 0xFFFD) + return EILSEQ; + if (need == 0) + return EINVAL; + result = malloc(sizeof(wchar_t) * need); + if (!result) + return ENOMEM; + MultiByteToWideChar(CP_UTF8, 0, src, srcsize, result, need); + if (dstsize) + *dstsize = need; + *dst = result; + return 0; +} +#endif /* defined(_WIN32) */ diff --git a/external/db_drivers/liblmdb32/mdb_copy.1 b/external/db_drivers/liblmdb/mdb_copy.1 similarity index 100% rename from external/db_drivers/liblmdb32/mdb_copy.1 rename to external/db_drivers/liblmdb/mdb_copy.1 diff --git a/external/db_drivers/liblmdb32/mdb_copy.c b/external/db_drivers/liblmdb/mdb_copy.c similarity index 100% rename from external/db_drivers/liblmdb32/mdb_copy.c rename to external/db_drivers/liblmdb/mdb_copy.c diff --git a/external/db_drivers/liblmdb32/mdb_dump.1 b/external/db_drivers/liblmdb/mdb_dump.1 similarity index 100% rename from external/db_drivers/liblmdb32/mdb_dump.1 rename to external/db_drivers/liblmdb/mdb_dump.1 index dd545049b..5a647ba2e 100644 --- a/external/db_drivers/liblmdb32/mdb_dump.1 +++ b/external/db_drivers/liblmdb/mdb_dump.1 @@ -5,7 +5,6 @@ mdb_dump \- LMDB environment export tool .SH SYNOPSIS .B mdb_dump -.BR \ envpath [\c .BR \-V ] [\c @@ -19,6 +18,7 @@ mdb_dump \- LMDB environment export tool [\c .BR \-a \ | .BI \-s \ subdb\fR] +.BR \ envpath .SH DESCRIPTION The .B mdb_dump diff --git a/external/db_drivers/liblmdb32/mdb_dump.c b/external/db_drivers/liblmdb/mdb_dump.c similarity index 96% rename from external/db_drivers/liblmdb32/mdb_dump.c rename to external/db_drivers/liblmdb/mdb_dump.c index 7202d865b..72a469052 100644 --- a/external/db_drivers/liblmdb32/mdb_dump.c +++ b/external/db_drivers/liblmdb/mdb_dump.c @@ -25,6 +25,15 @@ #else #define Z "z" #endif +#ifdef MDB_VL32 +#ifdef _WIN32 +#define Y "I64" +#else +#define Y "ll" +#endif +#else +#define Y Z +#endif #define PRINT 1 static int mode; @@ -115,7 +124,7 @@ static int dumpit(MDB_txn *txn, MDB_dbi dbi, char *name) if (name) printf("database=%s\n", name); printf("type=btree\n"); - printf("mapsize=%" Z "u\n", info.me_mapsize); + printf("mapsize=%" Y "u\n", info.me_mapsize); if (info.me_mapaddr) printf("mapaddr=%p\n", info.me_mapaddr); printf("maxreaders=%u\n", info.me_maxreaders); @@ -155,7 +164,7 @@ static int dumpit(MDB_txn *txn, MDB_dbi dbi, char *name) static void usage(char *prog) { - fprintf(stderr, "usage: %s dbpath [-V] [-f output] [-l] [-n] [-p] [-a|-s subdb]\n", prog); + fprintf(stderr, "usage: %s [-V] [-f output] [-l] [-n] [-p] [-a|-s subdb] dbpath\n", prog); exit(EXIT_FAILURE); } diff --git a/external/db_drivers/liblmdb32/mdb_load.1 b/external/db_drivers/liblmdb/mdb_load.1 similarity index 100% rename from external/db_drivers/liblmdb32/mdb_load.1 rename to external/db_drivers/liblmdb/mdb_load.1 index 511ec552b..712ed0540 100644 --- a/external/db_drivers/liblmdb32/mdb_load.1 +++ b/external/db_drivers/liblmdb/mdb_load.1 @@ -5,7 +5,6 @@ mdb_load \- LMDB environment import tool .SH SYNOPSIS .B mdb_load -.BR \ envpath [\c .BR \-V ] [\c @@ -18,6 +17,7 @@ mdb_load \- LMDB environment import tool .BR \-N ] [\c .BR \-T ] +.BR \ envpath .SH DESCRIPTION The .B mdb_load diff --git a/external/db_drivers/liblmdb32/mdb_load.c b/external/db_drivers/liblmdb/mdb_load.c similarity index 95% rename from external/db_drivers/liblmdb32/mdb_load.c rename to external/db_drivers/liblmdb/mdb_load.c index 1f6ce0b7e..d1fda4bf5 100644 --- a/external/db_drivers/liblmdb32/mdb_load.c +++ b/external/db_drivers/liblmdb/mdb_load.c @@ -43,6 +43,15 @@ static MDB_val kbuf, dbuf; #else #define Z "z" #endif +#ifdef MDB_VL32 +#ifdef _WIN32 +#define Y "I64" +#else +#define Y "ll" +#endif +#else +#define Y Z +#endif #define STRLENOF(s) (sizeof(s)-1) @@ -112,7 +121,7 @@ static void readhdr(void) int i; ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size); if (ptr) *ptr = '\0'; - i = sscanf((char *)dbuf.mv_data+STRLENOF("mapsize="), "%" Z "u", &info.me_mapsize); + i = sscanf((char *)dbuf.mv_data+STRLENOF("mapsize="), "%" Y "u", &info.me_mapsize); if (i != 1) { fprintf(stderr, "%s: line %" Z "d: invalid mapsize %s\n", prog, lineno, (char *)dbuf.mv_data+STRLENOF("mapsize=")); @@ -276,7 +285,7 @@ badend: static void usage(void) { - fprintf(stderr, "usage: %s dbpath [-V] [-f input] [-n] [-s name] [-N] [-T]\n", prog); + fprintf(stderr, "usage: %s [-V] [-f input] [-n] [-s name] [-N] [-T] dbpath\n", prog); exit(EXIT_FAILURE); } @@ -327,7 +336,7 @@ int main(int argc, char *argv[]) putflags = MDB_NOOVERWRITE|MDB_NODUPDATA; break; case 'T': - mode |= NOHDR; + mode |= NOHDR | PRINT; break; default: usage(); @@ -400,20 +409,22 @@ int main(int argc, char *argv[]) while(1) { rc = readline(&key, &kbuf); - if (rc == EOF) + if (rc) /* rc == EOF */ break; - if (rc) - goto txn_abort; rc = readline(&data, &dbuf); - if (rc) + if (rc) { + fprintf(stderr, "%s: line %" Z "d: failed to read key value\n", prog, lineno); goto txn_abort; - + } + rc = mdb_cursor_put(mc, &key, &data, putflags); if (rc == MDB_KEYEXIST && putflags) continue; - if (rc) + if (rc) { + fprintf(stderr, "mdb_cursor_put failed, error %d %s\n", rc, mdb_strerror(rc)); goto txn_abort; + } batch++; if (batch == 100) { rc = mdb_txn_commit(txn); diff --git a/external/db_drivers/liblmdb32/mdb_stat.1 b/external/db_drivers/liblmdb/mdb_stat.1 similarity index 100% rename from external/db_drivers/liblmdb32/mdb_stat.1 rename to external/db_drivers/liblmdb/mdb_stat.1 index e6ee5ad58..351c01757 100644 --- a/external/db_drivers/liblmdb32/mdb_stat.1 +++ b/external/db_drivers/liblmdb/mdb_stat.1 @@ -5,7 +5,6 @@ mdb_stat \- LMDB environment status tool .SH SYNOPSIS .B mdb_stat -.BR \ envpath [\c .BR \-V ] [\c @@ -19,6 +18,7 @@ mdb_stat \- LMDB environment status tool [\c .BR \-a \ | .BI \-s \ subdb\fR] +.BR \ envpath .SH DESCRIPTION The .B mdb_stat diff --git a/external/db_drivers/liblmdb64/mdb_stat.c b/external/db_drivers/liblmdb/mdb_stat.c similarity index 89% rename from external/db_drivers/liblmdb64/mdb_stat.c rename to external/db_drivers/liblmdb/mdb_stat.c index 210609b32..b785e7acf 100644 --- a/external/db_drivers/liblmdb64/mdb_stat.c +++ b/external/db_drivers/liblmdb/mdb_stat.c @@ -22,6 +22,15 @@ #else #define Z "z" #endif +#ifdef MDB_VL32 +#ifdef _WIN32 +#define Y "I64" +#else +#define Y "ll" +#endif +#else +#define Y Z +#endif static void prstat(MDB_stat *ms) { @@ -29,15 +38,15 @@ static void prstat(MDB_stat *ms) printf(" Page size: %u\n", ms->ms_psize); #endif printf(" Tree depth: %u\n", ms->ms_depth); - printf(" Branch pages: %"Z"u\n", ms->ms_branch_pages); - printf(" Leaf pages: %"Z"u\n", ms->ms_leaf_pages); - printf(" Overflow pages: %"Z"u\n", ms->ms_overflow_pages); - printf(" Entries: %"Z"u\n", ms->ms_entries); + printf(" Branch pages: %"Y"u\n", ms->ms_branch_pages); + printf(" Leaf pages: %"Y"u\n", ms->ms_leaf_pages); + printf(" Overflow pages: %"Y"u\n", ms->ms_overflow_pages); + printf(" Entries: %"Y"u\n", ms->ms_entries); } static void usage(char *prog) { - fprintf(stderr, "usage: %s dbpath [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb]\n", prog); + fprintf(stderr, "usage: %s [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb] dbpath\n", prog); exit(EXIT_FAILURE); } @@ -125,11 +134,11 @@ int main(int argc, char *argv[]) (void)mdb_env_info(env, &mei); printf("Environment Info\n"); printf(" Map address: %p\n", mei.me_mapaddr); - printf(" Map size: %"Z"u\n", mei.me_mapsize); + printf(" Map size: %"Y"u\n", mei.me_mapsize); printf(" Page size: %u\n", mst.ms_psize); - printf(" Max pages: %"Z"u\n", mei.me_mapsize / mst.ms_psize); - printf(" Number of pages used: %"Z"u\n", mei.me_last_pgno+1); - printf(" Last transaction ID: %"Z"u\n", mei.me_last_txnid); + printf(" Max pages: %"Y"u\n", mei.me_mapsize / mst.ms_psize); + printf(" Number of pages used: %"Y"u\n", mei.me_last_pgno+1); + printf(" Last transaction ID: %"Y"u\n", mei.me_last_txnid); printf(" Max readers: %u\n", mei.me_maxreaders); printf(" Number of readers used: %u\n", mei.me_numreaders); } diff --git a/external/db_drivers/liblmdb64/midl.c b/external/db_drivers/liblmdb/midl.c similarity index 86% rename from external/db_drivers/liblmdb64/midl.c rename to external/db_drivers/liblmdb/midl.c index 16782dcaf..e2005d16c 100644 --- a/external/db_drivers/liblmdb64/midl.c +++ b/external/db_drivers/liblmdb/midl.c @@ -116,7 +116,7 @@ void mdb_midl_free(MDB_IDL ids) free(ids-1); } -int mdb_midl_shrink( MDB_IDL *idp ) +void mdb_midl_shrink( MDB_IDL *idp ) { MDB_IDL ids = *idp; if (*(--ids) > MDB_IDL_UM_MAX && @@ -124,9 +124,7 @@ int mdb_midl_shrink( MDB_IDL *idp ) { *ids++ = MDB_IDL_UM_MAX; *idp = ids; - return 1; } - return 0; } static int mdb_midl_grow( MDB_IDL *idp, int num ) @@ -356,5 +354,67 @@ int mdb_mid2l_append( MDB_ID2L ids, MDB_ID2 *id ) return 0; } +#ifdef MDB_VL32 +unsigned mdb_mid3l_search( MDB_ID3L ids, MDB_ID id ) +{ + /* + * binary search of id in ids + * if found, returns position of id + * if not found, returns first position greater than id + */ + unsigned base = 0; + unsigned cursor = 1; + int val = 0; + unsigned n = (unsigned)ids[0].mid; + + while( 0 < n ) { + unsigned pivot = n >> 1; + cursor = base + pivot + 1; + val = CMP( id, ids[cursor].mid ); + + if( val < 0 ) { + n = pivot; + + } else if ( val > 0 ) { + base = cursor; + n -= pivot + 1; + + } else { + return cursor; + } + } + + if( val > 0 ) { + ++cursor; + } + return cursor; +} + +int mdb_mid3l_insert( MDB_ID3L ids, MDB_ID3 *id ) +{ + unsigned x, i; + + x = mdb_mid3l_search( ids, id->mid ); + + if( x < 1 ) { + /* internal error */ + return -2; + } + + if ( x <= ids[0].mid && ids[x].mid == id->mid ) { + /* duplicate */ + return -1; + } + + /* insert id */ + ids[0].mid++; + for (i=(unsigned)ids[0].mid; i>x; i--) + ids[i] = ids[i-1]; + ids[x] = *id; + + return 0; +} +#endif /* MDB_VL32 */ + /** @} */ /** @} */ diff --git a/external/db_drivers/liblmdb32/midl.h b/external/db_drivers/liblmdb/midl.h similarity index 91% rename from external/db_drivers/liblmdb32/midl.h rename to external/db_drivers/liblmdb/midl.h index 1e5fee797..ed1d75e36 100644 --- a/external/db_drivers/liblmdb32/midl.h +++ b/external/db_drivers/liblmdb/midl.h @@ -27,6 +27,7 @@ #define _MDB_MIDL_H_ #include +#include #ifdef __cplusplus extern "C" { @@ -42,7 +43,11 @@ extern "C" { /** A generic unsigned ID number. These were entryIDs in back-bdb. * Preferably it should have the same size as a pointer. */ +#ifdef MDB_VL32 +typedef uint64_t MDB_ID; +#else typedef size_t MDB_ID; +#endif /** An IDL is an ID List, a sorted array of IDs. The first * element of the array is a counter for how many actual @@ -55,10 +60,10 @@ typedef MDB_ID *MDB_IDL; /* IDL sizes - likely should be even bigger * limiting factors: sizeof(ID), thread stack size */ -#ifdef VL32 +#ifdef MDB_VL32 #define MDB_IDL_LOGN 10 /* DB_SIZE is 2^10, UM_SIZE is 2^11 */ #else - #define MDB_IDL_LOGN 16 /* DB_SIZE is 2^16, UM_SIZE is 2^17 */ +#define MDB_IDL_LOGN 16 /* DB_SIZE is 2^16, UM_SIZE is 2^17 */ #endif #define MDB_IDL_DB_SIZE (1<. - */ -#include -#include -#include -#include -#include "lmdb.h" - -#ifdef _WIN32 -#define Z "I" -#else -#define Z "z" -#endif - -static void prstat(MDB_stat *ms) -{ -#if 0 - printf(" Page size: %u\n", ms->ms_psize); -#endif - printf(" Tree depth: %u\n", ms->ms_depth); - printf(" Branch pages: %"Z"u\n", ms->ms_branch_pages); - printf(" Leaf pages: %"Z"u\n", ms->ms_leaf_pages); - printf(" Overflow pages: %"Z"u\n", ms->ms_overflow_pages); - printf(" Entries: %"Z"u\n", ms->ms_entries); -} - -static void usage(char *prog) -{ - fprintf(stderr, "usage: %s dbpath [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb]\n", prog); - exit(EXIT_FAILURE); -} - -int main(int argc, char *argv[]) -{ - int i, rc; - MDB_env *env; - MDB_txn *txn; - MDB_dbi dbi; - MDB_stat mst; - MDB_envinfo mei; - char *prog = argv[0]; - char *envname; - char *subname = NULL; - int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0; - - if (argc < 2) { - usage(prog); - } - - /* -a: print stat of main DB and all subDBs - * -s: print stat of only the named subDB - * -e: print env info - * -f: print freelist info - * -r: print reader info - * -n: use NOSUBDIR flag on env_open - * -V: print version and exit - * (default) print stat of only the main DB - */ - while ((i = getopt(argc, argv, "Vaefnrs:")) != EOF) { - switch(i) { - case 'V': - printf("%s\n", MDB_VERSION_STRING); - exit(0); - break; - case 'a': - if (subname) - usage(prog); - alldbs++; - break; - case 'e': - envinfo++; - break; - case 'f': - freinfo++; - break; - case 'n': - envflags |= MDB_NOSUBDIR; - break; - case 'r': - rdrinfo++; - break; - case 's': - if (alldbs) - usage(prog); - subname = optarg; - break; - default: - usage(prog); - } - } - - if (optind != argc - 1) - usage(prog); - - envname = argv[optind]; - rc = mdb_env_create(&env); - if (rc) { - fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc)); - return EXIT_FAILURE; - } - - if (alldbs || subname) { - mdb_env_set_maxdbs(env, 4); - } - - rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664); - if (rc) { - fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto env_close; - } - - if (envinfo) { - (void)mdb_env_stat(env, &mst); - (void)mdb_env_info(env, &mei); - printf("Environment Info\n"); - printf(" Map address: %p\n", mei.me_mapaddr); - printf(" Map size: %"Z"u\n", mei.me_mapsize); - printf(" Page size: %u\n", mst.ms_psize); - printf(" Max pages: %"Z"u\n", mei.me_mapsize / mst.ms_psize); - printf(" Number of pages used: %"Z"u\n", mei.me_last_pgno+1); - printf(" Last transaction ID: %"Z"u\n", mei.me_last_txnid); - printf(" Max readers: %u\n", mei.me_maxreaders); - printf(" Number of readers used: %u\n", mei.me_numreaders); - } - - if (rdrinfo) { - printf("Reader Table Status\n"); - rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout); - if (rdrinfo > 1) { - int dead; - mdb_reader_check(env, &dead); - printf(" %d stale readers cleared.\n", dead); - rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout); - } - if (!(subname || alldbs || freinfo)) - goto env_close; - } - - rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn); - if (rc) { - fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc)); - goto env_close; - } - - if (freinfo) { - MDB_cursor *cursor; - MDB_val key, data; - size_t pages = 0, *iptr; - - printf("Freelist Status\n"); - dbi = 0; - rc = mdb_cursor_open(txn, dbi, &cursor); - if (rc) { - fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - rc = mdb_stat(txn, dbi, &mst); - if (rc) { - fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - prstat(&mst); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - iptr = data.mv_data; - pages += *iptr; - if (freinfo > 1) { - char *bad = ""; - size_t pg, prev; - ssize_t i, j, span = 0; - j = *iptr++; - for (i = j, prev = 1; --i >= 0; ) { - pg = iptr[i]; - if (pg <= prev) - bad = " [bad sequence]"; - prev = pg; - pg += span; - for (; i >= span && iptr[i-span] == pg; span++, pg++) ; - } - printf(" Transaction %"Z"u, %"Z"d pages, maxspan %"Z"d%s\n", - *(size_t *)key.mv_data, j, span, bad); - if (freinfo > 2) { - for (--j; j >= 0; ) { - pg = iptr[j]; - for (span=1; --j >= 0 && iptr[j] == pg+span; span++) ; - printf(span>1 ? " %9"Z"u[%"Z"d]\n" : " %9"Z"u\n", - pg, span); - } - } - } - } - mdb_cursor_close(cursor); - printf(" Free pages: %"Z"u\n", pages); - } - - rc = mdb_open(txn, subname, 0, &dbi); - if (rc) { - fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - - rc = mdb_stat(txn, dbi, &mst); - if (rc) { - fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - printf("Status of %s\n", subname ? subname : "Main DB"); - prstat(&mst); - - if (alldbs) { - MDB_cursor *cursor; - MDB_val key; - - rc = mdb_cursor_open(txn, dbi, &cursor); - if (rc) { - fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) { - char *str; - MDB_dbi db2; - if (memchr(key.mv_data, '\0', key.mv_size)) - continue; - str = malloc(key.mv_size+1); - memcpy(str, key.mv_data, key.mv_size); - str[key.mv_size] = '\0'; - rc = mdb_open(txn, str, 0, &db2); - if (rc == MDB_SUCCESS) - printf("Status of %s\n", str); - free(str); - if (rc) continue; - rc = mdb_stat(txn, db2, &mst); - if (rc) { - fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - prstat(&mst); - mdb_close(env, db2); - } - mdb_cursor_close(cursor); - } - - if (rc == MDB_NOTFOUND) - rc = MDB_SUCCESS; - - mdb_close(env, dbi); -txn_abort: - mdb_txn_abort(txn); -env_close: - mdb_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/external/db_drivers/liblmdb32/midl.c b/external/db_drivers/liblmdb32/midl.c deleted file mode 100644 index 16782dcaf..000000000 --- a/external/db_drivers/liblmdb32/midl.c +++ /dev/null @@ -1,360 +0,0 @@ -/** @file midl.c - * @brief ldap bdb back-end ID List functions */ -/* $OpenLDAP$ */ -/* This work is part of OpenLDAP Software . - * - * Copyright 2000-2015 The OpenLDAP Foundation. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -#include -#include -#include -#include -#include -#include "midl.h" - -/** @defgroup internal LMDB Internals - * @{ - */ -/** @defgroup idls ID List Management - * @{ - */ -#define CMP(x,y) ( (x) < (y) ? -1 : (x) > (y) ) - -unsigned mdb_midl_search( MDB_IDL ids, MDB_ID id ) -{ - /* - * binary search of id in ids - * if found, returns position of id - * if not found, returns first position greater than id - */ - unsigned base = 0; - unsigned cursor = 1; - int val = 0; - unsigned n = ids[0]; - - while( 0 < n ) { - unsigned pivot = n >> 1; - cursor = base + pivot + 1; - val = CMP( ids[cursor], id ); - - if( val < 0 ) { - n = pivot; - - } else if ( val > 0 ) { - base = cursor; - n -= pivot + 1; - - } else { - return cursor; - } - } - - if( val > 0 ) { - ++cursor; - } - return cursor; -} - -#if 0 /* superseded by append/sort */ -int mdb_midl_insert( MDB_IDL ids, MDB_ID id ) -{ - unsigned x, i; - - x = mdb_midl_search( ids, id ); - assert( x > 0 ); - - if( x < 1 ) { - /* internal error */ - return -2; - } - - if ( x <= ids[0] && ids[x] == id ) { - /* duplicate */ - assert(0); - return -1; - } - - if ( ++ids[0] >= MDB_IDL_DB_MAX ) { - /* no room */ - --ids[0]; - return -2; - - } else { - /* insert id */ - for (i=ids[0]; i>x; i--) - ids[i] = ids[i-1]; - ids[x] = id; - } - - return 0; -} -#endif - -MDB_IDL mdb_midl_alloc(int num) -{ - MDB_IDL ids = malloc((num+2) * sizeof(MDB_ID)); - if (ids) { - *ids++ = num; - *ids = 0; - } - return ids; -} - -void mdb_midl_free(MDB_IDL ids) -{ - if (ids) - free(ids-1); -} - -int mdb_midl_shrink( MDB_IDL *idp ) -{ - MDB_IDL ids = *idp; - if (*(--ids) > MDB_IDL_UM_MAX && - (ids = realloc(ids, (MDB_IDL_UM_MAX+1) * sizeof(MDB_ID)))) - { - *ids++ = MDB_IDL_UM_MAX; - *idp = ids; - return 1; - } - return 0; -} - -static int mdb_midl_grow( MDB_IDL *idp, int num ) -{ - MDB_IDL idn = *idp-1; - /* grow it */ - idn = realloc(idn, (*idn + num + 2) * sizeof(MDB_ID)); - if (!idn) - return ENOMEM; - *idn++ += num; - *idp = idn; - return 0; -} - -int mdb_midl_need( MDB_IDL *idp, unsigned num ) -{ - MDB_IDL ids = *idp; - num += ids[0]; - if (num > ids[-1]) { - num = (num + num/4 + (256 + 2)) & -256; - if (!(ids = realloc(ids-1, num * sizeof(MDB_ID)))) - return ENOMEM; - *ids++ = num - 2; - *idp = ids; - } - return 0; -} - -int mdb_midl_append( MDB_IDL *idp, MDB_ID id ) -{ - MDB_IDL ids = *idp; - /* Too big? */ - if (ids[0] >= ids[-1]) { - if (mdb_midl_grow(idp, MDB_IDL_UM_MAX)) - return ENOMEM; - ids = *idp; - } - ids[0]++; - ids[ids[0]] = id; - return 0; -} - -int mdb_midl_append_list( MDB_IDL *idp, MDB_IDL app ) -{ - MDB_IDL ids = *idp; - /* Too big? */ - if (ids[0] + app[0] >= ids[-1]) { - if (mdb_midl_grow(idp, app[0])) - return ENOMEM; - ids = *idp; - } - memcpy(&ids[ids[0]+1], &app[1], app[0] * sizeof(MDB_ID)); - ids[0] += app[0]; - return 0; -} - -int mdb_midl_append_range( MDB_IDL *idp, MDB_ID id, unsigned n ) -{ - MDB_ID *ids = *idp, len = ids[0]; - /* Too big? */ - if (len + n > ids[-1]) { - if (mdb_midl_grow(idp, n | MDB_IDL_UM_MAX)) - return ENOMEM; - ids = *idp; - } - ids[0] = len + n; - ids += len; - while (n) - ids[n--] = id++; - return 0; -} - -void mdb_midl_xmerge( MDB_IDL idl, MDB_IDL merge ) -{ - MDB_ID old_id, merge_id, i = merge[0], j = idl[0], k = i+j, total = k; - idl[0] = (MDB_ID)-1; /* delimiter for idl scan below */ - old_id = idl[j]; - while (i) { - merge_id = merge[i--]; - for (; old_id < merge_id; old_id = idl[--j]) - idl[k--] = old_id; - idl[k--] = merge_id; - } - idl[0] = total; -} - -/* Quicksort + Insertion sort for small arrays */ - -#define SMALL 8 -#define MIDL_SWAP(a,b) { itmp=(a); (a)=(b); (b)=itmp; } - -void -mdb_midl_sort( MDB_IDL ids ) -{ - /* Max possible depth of int-indexed tree * 2 items/level */ - int istack[sizeof(int)*CHAR_BIT * 2]; - int i,j,k,l,ir,jstack; - MDB_ID a, itmp; - - ir = (int)ids[0]; - l = 1; - jstack = 0; - for(;;) { - if (ir - l < SMALL) { /* Insertion sort */ - for (j=l+1;j<=ir;j++) { - a = ids[j]; - for (i=j-1;i>=1;i--) { - if (ids[i] >= a) break; - ids[i+1] = ids[i]; - } - ids[i+1] = a; - } - if (jstack == 0) break; - ir = istack[jstack--]; - l = istack[jstack--]; - } else { - k = (l + ir) >> 1; /* Choose median of left, center, right */ - MIDL_SWAP(ids[k], ids[l+1]); - if (ids[l] < ids[ir]) { - MIDL_SWAP(ids[l], ids[ir]); - } - if (ids[l+1] < ids[ir]) { - MIDL_SWAP(ids[l+1], ids[ir]); - } - if (ids[l] < ids[l+1]) { - MIDL_SWAP(ids[l], ids[l+1]); - } - i = l+1; - j = ir; - a = ids[l+1]; - for(;;) { - do i++; while(ids[i] > a); - do j--; while(ids[j] < a); - if (j < i) break; - MIDL_SWAP(ids[i],ids[j]); - } - ids[l+1] = ids[j]; - ids[j] = a; - jstack += 2; - if (ir-i+1 >= j-l) { - istack[jstack] = ir; - istack[jstack-1] = i; - ir = j-1; - } else { - istack[jstack] = j-1; - istack[jstack-1] = l; - l = i; - } - } - } -} - -unsigned mdb_mid2l_search( MDB_ID2L ids, MDB_ID id ) -{ - /* - * binary search of id in ids - * if found, returns position of id - * if not found, returns first position greater than id - */ - unsigned base = 0; - unsigned cursor = 1; - int val = 0; - unsigned n = (unsigned)ids[0].mid; - - while( 0 < n ) { - unsigned pivot = n >> 1; - cursor = base + pivot + 1; - val = CMP( id, ids[cursor].mid ); - - if( val < 0 ) { - n = pivot; - - } else if ( val > 0 ) { - base = cursor; - n -= pivot + 1; - - } else { - return cursor; - } - } - - if( val > 0 ) { - ++cursor; - } - return cursor; -} - -int mdb_mid2l_insert( MDB_ID2L ids, MDB_ID2 *id ) -{ - unsigned x, i; - - x = mdb_mid2l_search( ids, id->mid ); - - if( x < 1 ) { - /* internal error */ - return -2; - } - - if ( x <= ids[0].mid && ids[x].mid == id->mid ) { - /* duplicate */ - return -1; - } - - if ( ids[0].mid >= MDB_IDL_UM_MAX ) { - /* too big */ - return -2; - - } else { - /* insert id */ - ids[0].mid++; - for (i=(unsigned)ids[0].mid; i>x; i--) - ids[i] = ids[i-1]; - ids[x] = *id; - } - - return 0; -} - -int mdb_mid2l_append( MDB_ID2L ids, MDB_ID2 *id ) -{ - /* Too big? */ - if (ids[0].mid >= MDB_IDL_UM_MAX) { - return -2; - } - ids[0].mid++; - ids[ids[0].mid] = *id; - return 0; -} - -/** @} */ -/** @} */ diff --git a/external/db_drivers/liblmdb32/mtest.c b/external/db_drivers/liblmdb32/mtest.c deleted file mode 100644 index 0b53bc4d0..000000000 --- a/external/db_drivers/liblmdb32/mtest.c +++ /dev/null @@ -1,177 +0,0 @@ -/* mtest.c - memory-mapped database tester/toy */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ -#include -#include -#include -#include "lmdb.h" - -#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) -#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) -#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ - "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) - -int main(int argc,char * argv[]) -{ - int i = 0, j = 0, rc; - MDB_env *env; - MDB_dbi dbi; - MDB_val key, data; - MDB_txn *txn; - MDB_stat mst; - MDB_cursor *cursor, *cur2; - MDB_cursor_op op; - int count; - int *values; - char sval[32] = ""; - - srand(time(NULL)); - - count = (rand()%384) + 64; - values = (int *)malloc(count*sizeof(int)); - - for(i = 0;i in each iteration, since MDB_NOOVERWRITE may modify it */ - data.mv_size = sizeof(sval); - data.mv_data = sval; - if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) { - j++; - data.mv_size = sizeof(sval); - data.mv_data = sval; - } - } - if (j) printf("%d duplicates skipped\n", j); - E(mdb_txn_commit(txn)); - E(mdb_env_stat(env, &mst)); - - E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %p %.*s, data: %p %.*s\n", - key.mv_data, (int) key.mv_size, (char *) key.mv_data, - data.mv_data, (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - j=0; - key.mv_data = sval; - for (i= count - 1; i > -1; i-= (rand()%5)) { - j++; - txn=NULL; - E(mdb_txn_begin(env, NULL, 0, &txn)); - sprintf(sval, "%03x ", values[i]); - if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) { - j--; - mdb_txn_abort(txn); - } else { - E(mdb_txn_commit(txn)); - } - } - free(values); - printf("Deleted %d values\n", j); - - E(mdb_env_stat(env, &mst)); - E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - printf("Cursor next\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - printf("Cursor last\n"); - E(mdb_cursor_get(cursor, &key, &data, MDB_LAST)); - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - printf("Cursor prev\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - printf("Cursor last/prev\n"); - E(mdb_cursor_get(cursor, &key, &data, MDB_LAST)); - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - E(mdb_cursor_get(cursor, &key, &data, MDB_PREV)); - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - printf("Deleting with cursor\n"); - E(mdb_txn_begin(env, NULL, 0, &txn)); - E(mdb_cursor_open(txn, dbi, &cur2)); - for (i=0; i<50; i++) { - if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, MDB_NEXT))) - break; - printf("key: %p %.*s, data: %p %.*s\n", - key.mv_data, (int) key.mv_size, (char *) key.mv_data, - data.mv_data, (int) data.mv_size, (char *) data.mv_data); - E(mdb_del(txn, dbi, &key, NULL)); - } - - printf("Restarting cursor in txn\n"); - for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) { - if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, op))) - break; - printf("key: %p %.*s, data: %p %.*s\n", - key.mv_data, (int) key.mv_size, (char *) key.mv_data, - data.mv_data, (int) data.mv_size, (char *) data.mv_data); - } - mdb_cursor_close(cur2); - E(mdb_txn_commit(txn)); - - printf("Restarting cursor outside txn\n"); - E(mdb_txn_begin(env, NULL, 0, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) { - if (RES(MDB_NOTFOUND, mdb_cursor_get(cursor, &key, &data, op))) - break; - printf("key: %p %.*s, data: %p %.*s\n", - key.mv_data, (int) key.mv_size, (char *) key.mv_data, - data.mv_data, (int) data.mv_size, (char *) data.mv_data); - } - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - mdb_dbi_close(env, dbi); - mdb_env_close(env); - - return 0; -} diff --git a/external/db_drivers/liblmdb64/CMakeLists.txt b/external/db_drivers/liblmdb64/CMakeLists.txt deleted file mode 100644 index bca7ff51e..000000000 --- a/external/db_drivers/liblmdb64/CMakeLists.txt +++ /dev/null @@ -1,43 +0,0 @@ -# Copyright (c) 2014-2015, The Monero Project -# -# All rights reserved. -# -# Redistribution and use in source and binary forms, with or without modification, are -# permitted provided that the following conditions are met: -# -# 1. Redistributions of source code must retain the above copyright notice, this list of -# conditions and the following disclaimer. -# -# 2. Redistributions in binary form must reproduce the above copyright notice, this list -# of conditions and the following disclaimer in the documentation and/or other -# materials provided with the distribution. -# -# 3. Neither the name of the copyright holder nor the names of its contributors may be -# used to endorse or promote products derived from this software without specific -# prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY -# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL -# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF -# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -if(FREEBSD) - set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DMDB_DSYNC=O_SYNC") -endif() - -set (lmdb_sources -mdb.c -midl.c) - -include_directories("${CMAKE_CURRENT_SOURCE_DIR}") - -add_library(lmdb - ${lmdb_sources}) -target_link_libraries(lmdb - LINK_PRIVATE - ${CMAKE_THREAD_LIBS_INIT}) diff --git a/external/db_drivers/liblmdb64/COPYRIGHT b/external/db_drivers/liblmdb64/COPYRIGHT deleted file mode 100644 index 722d1a515..000000000 --- a/external/db_drivers/liblmdb64/COPYRIGHT +++ /dev/null @@ -1,20 +0,0 @@ -Copyright 2011-2015 Howard Chu, Symas Corp. -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted only as authorized by the OpenLDAP -Public License. - -A copy of this license is available in the file LICENSE in the -top-level directory of the distribution or, alternatively, at -. - -OpenLDAP is a registered trademark of the OpenLDAP Foundation. - -Individual files and/or contributed packages may be copyright by -other parties and/or subject to additional restrictions. - -This work also contains materials derived from public sources. - -Additional information about OpenLDAP can be obtained at -. diff --git a/external/db_drivers/liblmdb64/Doxyfile b/external/db_drivers/liblmdb64/Doxyfile deleted file mode 100644 index 92d17b09e..000000000 --- a/external/db_drivers/liblmdb64/Doxyfile +++ /dev/null @@ -1,1631 +0,0 @@ -# Doxyfile 1.7.1 - -# This file describes the settings to be used by the documentation system -# doxygen (www.doxygen.org) for a project -# -# All text after a hash (#) is considered a comment and will be ignored -# The format is: -# TAG = value [value, ...] -# For lists items can also be appended using: -# TAG += value [value, ...] -# Values that contain spaces should be placed between quotes (" ") - -#--------------------------------------------------------------------------- -# Project related configuration options -#--------------------------------------------------------------------------- - -# This tag specifies the encoding used for all characters in the config file -# that follow. The default is UTF-8 which is also the encoding used for all -# text before the first occurrence of this tag. Doxygen uses libiconv (or the -# iconv built into libc) for the transcoding. See -# http://www.gnu.org/software/libiconv for the list of possible encodings. - -DOXYFILE_ENCODING = UTF-8 - -# The PROJECT_NAME tag is a single word (or a sequence of words surrounded -# by quotes) that should identify the project. - -PROJECT_NAME = LMDB - -# The PROJECT_NUMBER tag can be used to enter a project or revision number. -# This could be handy for archiving the generated documentation or -# if some version control system is used. - -PROJECT_NUMBER = - -# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) -# base path where the generated documentation will be put. -# If a relative path is entered, it will be relative to the location -# where doxygen was started. If left blank the current directory will be used. - -OUTPUT_DIRECTORY = - -# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create -# 4096 sub-directories (in 2 levels) under the output directory of each output -# format and will distribute the generated files over these directories. -# Enabling this option can be useful when feeding doxygen a huge amount of -# source files, where putting all generated files in the same directory would -# otherwise cause performance problems for the file system. - -CREATE_SUBDIRS = NO - -# The OUTPUT_LANGUAGE tag is used to specify the language in which all -# documentation generated by doxygen is written. Doxygen will use this -# information to generate all constant output in the proper language. -# The default language is English, other supported languages are: -# Afrikaans, Arabic, Brazilian, Catalan, Chinese, Chinese-Traditional, -# Croatian, Czech, Danish, Dutch, Esperanto, Farsi, Finnish, French, German, -# Greek, Hungarian, Italian, Japanese, Japanese-en (Japanese with English -# messages), Korean, Korean-en, Lithuanian, Norwegian, Macedonian, Persian, -# Polish, Portuguese, Romanian, Russian, Serbian, Serbian-Cyrilic, Slovak, -# Slovene, Spanish, Swedish, Ukrainian, and Vietnamese. - -OUTPUT_LANGUAGE = English - -# If the BRIEF_MEMBER_DESC tag is set to YES (the default) Doxygen will -# include brief member descriptions after the members that are listed in -# the file and class documentation (similar to JavaDoc). -# Set to NO to disable this. - -BRIEF_MEMBER_DESC = YES - -# If the REPEAT_BRIEF tag is set to YES (the default) Doxygen will prepend -# the brief description of a member or function before the detailed description. -# Note: if both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the -# brief descriptions will be completely suppressed. - -REPEAT_BRIEF = YES - -# This tag implements a quasi-intelligent brief description abbreviator -# that is used to form the text in various listings. Each string -# in this list, if found as the leading text of the brief description, will be -# stripped from the text and the result after processing the whole list, is -# used as the annotated text. Otherwise, the brief description is used as-is. -# If left blank, the following values are used ("$name" is automatically -# replaced with the name of the entity): "The $name class" "The $name widget" -# "The $name file" "is" "provides" "specifies" "contains" -# "represents" "a" "an" "the" - -ABBREVIATE_BRIEF = - -# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then -# Doxygen will generate a detailed section even if there is only a brief -# description. - -ALWAYS_DETAILED_SEC = NO - -# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all -# inherited members of a class in the documentation of that class as if those -# members were ordinary class members. Constructors, destructors and assignment -# operators of the base classes will not be shown. - -INLINE_INHERITED_MEMB = NO - -# If the FULL_PATH_NAMES tag is set to YES then Doxygen will prepend the full -# path before files name in the file list and in the header files. If set -# to NO the shortest path that makes the file name unique will be used. - -FULL_PATH_NAMES = YES - -# If the FULL_PATH_NAMES tag is set to YES then the STRIP_FROM_PATH tag -# can be used to strip a user-defined part of the path. Stripping is -# only done if one of the specified strings matches the left-hand part of -# the path. The tag can be used to show relative paths in the file list. -# If left blank the directory from which doxygen is run is used as the -# path to strip. - -STRIP_FROM_PATH = - -# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of -# the path mentioned in the documentation of a class, which tells -# the reader which header file to include in order to use a class. -# If left blank only the name of the header file containing the class -# definition is used. Otherwise one should specify the include paths that -# are normally passed to the compiler using the -I flag. - -STRIP_FROM_INC_PATH = - -# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter -# (but less readable) file names. This can be useful is your file systems -# doesn't support long names like on DOS, Mac, or CD-ROM. - -SHORT_NAMES = NO - -# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen -# will interpret the first line (until the first dot) of a JavaDoc-style -# comment as the brief description. If set to NO, the JavaDoc -# comments will behave just like regular Qt-style comments -# (thus requiring an explicit @brief command for a brief description.) - -JAVADOC_AUTOBRIEF = NO - -# If the QT_AUTOBRIEF tag is set to YES then Doxygen will -# interpret the first line (until the first dot) of a Qt-style -# comment as the brief description. If set to NO, the comments -# will behave just like regular Qt-style comments (thus requiring -# an explicit \brief command for a brief description.) - -QT_AUTOBRIEF = NO - -# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make Doxygen -# treat a multi-line C++ special comment block (i.e. a block of //! or /// -# comments) as a brief description. This used to be the default behaviour. -# The new default is to treat a multi-line C++ comment block as a detailed -# description. Set this tag to YES if you prefer the old behaviour instead. - -MULTILINE_CPP_IS_BRIEF = NO - -# If the INHERIT_DOCS tag is set to YES (the default) then an undocumented -# member inherits the documentation from any documented member that it -# re-implements. - -INHERIT_DOCS = YES - -# If the SEPARATE_MEMBER_PAGES tag is set to YES, then doxygen will produce -# a new page for each member. If set to NO, the documentation of a member will -# be part of the file/class/namespace that contains it. - -SEPARATE_MEMBER_PAGES = NO - -# The TAB_SIZE tag can be used to set the number of spaces in a tab. -# Doxygen uses this value to replace tabs by spaces in code fragments. - -TAB_SIZE = 4 - -# This tag can be used to specify a number of aliases that acts -# as commands in the documentation. An alias has the form "name=value". -# For example adding "sideeffect=\par Side Effects:\n" will allow you to -# put the command \sideeffect (or @sideeffect) in the documentation, which -# will result in a user-defined paragraph with heading "Side Effects:". -# You can put \n's in the value part of an alias to insert newlines. - -ALIASES = - -# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C -# sources only. Doxygen will then generate output that is more tailored for C. -# For instance, some of the names that are used will be different. The list -# of all members will be omitted, etc. - -OPTIMIZE_OUTPUT_FOR_C = YES - -# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java -# sources only. Doxygen will then generate output that is more tailored for -# Java. For instance, namespaces will be presented as packages, qualified -# scopes will look different, etc. - -OPTIMIZE_OUTPUT_JAVA = NO - -# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran -# sources only. Doxygen will then generate output that is more tailored for -# Fortran. - -OPTIMIZE_FOR_FORTRAN = NO - -# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL -# sources. Doxygen will then generate output that is tailored for -# VHDL. - -OPTIMIZE_OUTPUT_VHDL = NO - -# Doxygen selects the parser to use depending on the extension of the files it -# parses. With this tag you can assign which parser to use for a given extension. -# Doxygen has a built-in mapping, but you can override or extend it using this -# tag. The format is ext=language, where ext is a file extension, and language -# is one of the parsers supported by doxygen: IDL, Java, Javascript, CSharp, C, -# C++, D, PHP, Objective-C, Python, Fortran, VHDL, C, C++. For instance to make -# doxygen treat .inc files as Fortran files (default is PHP), and .f files as C -# (default is Fortran), use: inc=Fortran f=C. Note that for custom extensions -# you also need to set FILE_PATTERNS otherwise the files are not read by doxygen. - -EXTENSION_MAPPING = - -# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want -# to include (a tag file for) the STL sources as input, then you should -# set this tag to YES in order to let doxygen match functions declarations and -# definitions whose arguments contain STL classes (e.g. func(std::string); v.s. -# func(std::string) {}). This also make the inheritance and collaboration -# diagrams that involve STL classes more complete and accurate. - -BUILTIN_STL_SUPPORT = NO - -# If you use Microsoft's C++/CLI language, you should set this option to YES to -# enable parsing support. - -CPP_CLI_SUPPORT = NO - -# Set the SIP_SUPPORT tag to YES if your project consists of sip sources only. -# Doxygen will parse them like normal C++ but will assume all classes use public -# instead of private inheritance when no explicit protection keyword is present. - -SIP_SUPPORT = NO - -# For Microsoft's IDL there are propget and propput attributes to indicate getter -# and setter methods for a property. Setting this option to YES (the default) -# will make doxygen to replace the get and set methods by a property in the -# documentation. This will only work if the methods are indeed getting or -# setting a simple type. If this is not the case, or you want to show the -# methods anyway, you should set this option to NO. - -IDL_PROPERTY_SUPPORT = YES - -# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC -# tag is set to YES, then doxygen will reuse the documentation of the first -# member in the group (if any) for the other members of the group. By default -# all members of a group must be documented explicitly. - -DISTRIBUTE_GROUP_DOC = NO - -# Set the SUBGROUPING tag to YES (the default) to allow class member groups of -# the same type (for instance a group of public functions) to be put as a -# subgroup of that type (e.g. under the Public Functions section). Set it to -# NO to prevent subgrouping. Alternatively, this can be done per class using -# the \nosubgrouping command. - -SUBGROUPING = YES - -INLINE_GROUPED_CLASSES = YES -# When TYPEDEF_HIDES_STRUCT is enabled, a typedef of a struct, union, or enum -# is documented as struct, union, or enum with the name of the typedef. So -# typedef struct TypeS {} TypeT, will appear in the documentation as a struct -# with name TypeT. When disabled the typedef will appear as a member of a file, -# namespace, or class. And the struct will be named TypeS. This can typically -# be useful for C code in case the coding convention dictates that all compound -# types are typedef'ed and only the typedef is referenced, never the tag name. - -TYPEDEF_HIDES_STRUCT = YES - -# The SYMBOL_CACHE_SIZE determines the size of the internal cache use to -# determine which symbols to keep in memory and which to flush to disk. -# When the cache is full, less often used symbols will be written to disk. -# For small to medium size projects (<1000 input files) the default value is -# probably good enough. For larger projects a too small cache size can cause -# doxygen to be busy swapping symbols to and from disk most of the time -# causing a significant performance penality. -# If the system has enough physical memory increasing the cache will improve the -# performance by keeping more symbols in memory. Note that the value works on -# a logarithmic scale so increasing the size by one will rougly double the -# memory usage. The cache size is given by this formula: -# 2^(16+SYMBOL_CACHE_SIZE). The valid range is 0..9, the default is 0, -# corresponding to a cache size of 2^16 = 65536 symbols - -SYMBOL_CACHE_SIZE = 0 - -#--------------------------------------------------------------------------- -# Build related configuration options -#--------------------------------------------------------------------------- - -# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in -# documentation are documented, even if no documentation was available. -# Private class members and static file members will be hidden unless -# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES - -EXTRACT_ALL = NO - -# If the EXTRACT_PRIVATE tag is set to YES all private members of a class -# will be included in the documentation. - -EXTRACT_PRIVATE = NO - -# If the EXTRACT_STATIC tag is set to YES all static members of a file -# will be included in the documentation. - -EXTRACT_STATIC = YES - -# If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs) -# defined locally in source files will be included in the documentation. -# If set to NO only classes defined in header files are included. - -EXTRACT_LOCAL_CLASSES = YES - -# This flag is only useful for Objective-C code. When set to YES local -# methods, which are defined in the implementation section but not in -# the interface are included in the documentation. -# If set to NO (the default) only methods in the interface are included. - -EXTRACT_LOCAL_METHODS = NO - -# If this flag is set to YES, the members of anonymous namespaces will be -# extracted and appear in the documentation as a namespace called -# 'anonymous_namespace{file}', where file will be replaced with the base -# name of the file that contains the anonymous namespace. By default -# anonymous namespace are hidden. - -EXTRACT_ANON_NSPACES = NO - -# If the HIDE_UNDOC_MEMBERS tag is set to YES, Doxygen will hide all -# undocumented members of documented classes, files or namespaces. -# If set to NO (the default) these members will be included in the -# various overviews, but no documentation section is generated. -# This option has no effect if EXTRACT_ALL is enabled. - -HIDE_UNDOC_MEMBERS = NO - -# If the HIDE_UNDOC_CLASSES tag is set to YES, Doxygen will hide all -# undocumented classes that are normally visible in the class hierarchy. -# If set to NO (the default) these classes will be included in the various -# overviews. This option has no effect if EXTRACT_ALL is enabled. - -HIDE_UNDOC_CLASSES = NO - -# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, Doxygen will hide all -# friend (class|struct|union) declarations. -# If set to NO (the default) these declarations will be included in the -# documentation. - -HIDE_FRIEND_COMPOUNDS = NO - -# If the HIDE_IN_BODY_DOCS tag is set to YES, Doxygen will hide any -# documentation blocks found inside the body of a function. -# If set to NO (the default) these blocks will be appended to the -# function's detailed documentation block. - -HIDE_IN_BODY_DOCS = NO - -# The INTERNAL_DOCS tag determines if documentation -# that is typed after a \internal command is included. If the tag is set -# to NO (the default) then the documentation will be excluded. -# Set it to YES to include the internal documentation. - -INTERNAL_DOCS = NO - -# If the CASE_SENSE_NAMES tag is set to NO then Doxygen will only generate -# file names in lower-case letters. If set to YES upper-case letters are also -# allowed. This is useful if you have classes or files whose names only differ -# in case and if your file system supports case sensitive file names. Windows -# and Mac users are advised to set this option to NO. - -CASE_SENSE_NAMES = YES - -# If the HIDE_SCOPE_NAMES tag is set to NO (the default) then Doxygen -# will show members with their full class and namespace scopes in the -# documentation. If set to YES the scope will be hidden. - -HIDE_SCOPE_NAMES = NO - -# If the SHOW_INCLUDE_FILES tag is set to YES (the default) then Doxygen -# will put a list of the files that are included by a file in the documentation -# of that file. - -SHOW_INCLUDE_FILES = YES - -# If the FORCE_LOCAL_INCLUDES tag is set to YES then Doxygen -# will list include files with double quotes in the documentation -# rather than with sharp brackets. - -FORCE_LOCAL_INCLUDES = NO - -# If the INLINE_INFO tag is set to YES (the default) then a tag [inline] -# is inserted in the documentation for inline members. - -INLINE_INFO = YES - -# If the SORT_MEMBER_DOCS tag is set to YES (the default) then doxygen -# will sort the (detailed) documentation of file and class members -# alphabetically by member name. If set to NO the members will appear in -# declaration order. - -SORT_MEMBER_DOCS = NO - -# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the -# brief documentation of file, namespace and class members alphabetically -# by member name. If set to NO (the default) the members will appear in -# declaration order. - -SORT_BRIEF_DOCS = NO - -# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen -# will sort the (brief and detailed) documentation of class members so that -# constructors and destructors are listed first. If set to NO (the default) -# the constructors will appear in the respective orders defined by -# SORT_MEMBER_DOCS and SORT_BRIEF_DOCS. -# This tag will be ignored for brief docs if SORT_BRIEF_DOCS is set to NO -# and ignored for detailed docs if SORT_MEMBER_DOCS is set to NO. - -SORT_MEMBERS_CTORS_1ST = NO - -# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the -# hierarchy of group names into alphabetical order. If set to NO (the default) -# the group names will appear in their defined order. - -SORT_GROUP_NAMES = NO - -# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be -# sorted by fully-qualified names, including namespaces. If set to -# NO (the default), the class list will be sorted only by class name, -# not including the namespace part. -# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES. -# Note: This option applies only to the class list, not to the -# alphabetical list. - -SORT_BY_SCOPE_NAME = NO - -# The GENERATE_TODOLIST tag can be used to enable (YES) or -# disable (NO) the todo list. This list is created by putting \todo -# commands in the documentation. - -GENERATE_TODOLIST = YES - -# The GENERATE_TESTLIST tag can be used to enable (YES) or -# disable (NO) the test list. This list is created by putting \test -# commands in the documentation. - -GENERATE_TESTLIST = YES - -# The GENERATE_BUGLIST tag can be used to enable (YES) or -# disable (NO) the bug list. This list is created by putting \bug -# commands in the documentation. - -GENERATE_BUGLIST = YES - -# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or -# disable (NO) the deprecated list. This list is created by putting -# \deprecated commands in the documentation. - -GENERATE_DEPRECATEDLIST= YES - -# The ENABLED_SECTIONS tag can be used to enable conditional -# documentation sections, marked by \if sectionname ... \endif. - -ENABLED_SECTIONS = - -# The MAX_INITIALIZER_LINES tag determines the maximum number of lines -# the initial value of a variable or define consists of for it to appear in -# the documentation. If the initializer consists of more lines than specified -# here it will be hidden. Use a value of 0 to hide initializers completely. -# The appearance of the initializer of individual variables and defines in the -# documentation can be controlled using \showinitializer or \hideinitializer -# command in the documentation regardless of this setting. - -MAX_INITIALIZER_LINES = 30 - -# Set the SHOW_USED_FILES tag to NO to disable the list of files generated -# at the bottom of the documentation of classes and structs. If set to YES the -# list will mention the files that were used to generate the documentation. - -SHOW_USED_FILES = YES - -# If the sources in your project are distributed over multiple directories -# then setting the SHOW_DIRECTORIES tag to YES will show the directory hierarchy -# in the documentation. The default is NO. - -SHOW_DIRECTORIES = NO - -# Set the SHOW_FILES tag to NO to disable the generation of the Files page. -# This will remove the Files entry from the Quick Index and from the -# Folder Tree View (if specified). The default is YES. - -SHOW_FILES = YES - -# Set the SHOW_NAMESPACES tag to NO to disable the generation of the -# Namespaces page. -# This will remove the Namespaces entry from the Quick Index -# and from the Folder Tree View (if specified). The default is YES. - -SHOW_NAMESPACES = YES - -# The FILE_VERSION_FILTER tag can be used to specify a program or script that -# doxygen should invoke to get the current version for each file (typically from -# the version control system). Doxygen will invoke the program by executing (via -# popen()) the command , where is the value of -# the FILE_VERSION_FILTER tag, and is the name of an input file -# provided by doxygen. Whatever the program writes to standard output -# is used as the file version. See the manual for examples. - -FILE_VERSION_FILTER = - -# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed -# by doxygen. The layout file controls the global structure of the generated -# output files in an output format independent way. The create the layout file -# that represents doxygen's defaults, run doxygen with the -l option. -# You can optionally specify a file name after the option, if omitted -# DoxygenLayout.xml will be used as the name of the layout file. - -LAYOUT_FILE = - -#--------------------------------------------------------------------------- -# configuration options related to warning and progress messages -#--------------------------------------------------------------------------- - -# The QUIET tag can be used to turn on/off the messages that are generated -# by doxygen. Possible values are YES and NO. If left blank NO is used. - -QUIET = NO - -# The WARNINGS tag can be used to turn on/off the warning messages that are -# generated by doxygen. Possible values are YES and NO. If left blank -# NO is used. - -WARNINGS = YES - -# If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate warnings -# for undocumented members. If EXTRACT_ALL is set to YES then this flag will -# automatically be disabled. - -WARN_IF_UNDOCUMENTED = YES - -# If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings for -# potential errors in the documentation, such as not documenting some -# parameters in a documented function, or documenting parameters that -# don't exist or using markup commands wrongly. - -WARN_IF_DOC_ERROR = YES - -# This WARN_NO_PARAMDOC option can be abled to get warnings for -# functions that are documented, but have no documentation for their parameters -# or return value. If set to NO (the default) doxygen will only warn about -# wrong or incomplete parameter documentation, but not about the absence of -# documentation. - -WARN_NO_PARAMDOC = NO - -# The WARN_FORMAT tag determines the format of the warning messages that -# doxygen can produce. The string should contain the $file, $line, and $text -# tags, which will be replaced by the file and line number from which the -# warning originated and the warning text. Optionally the format may contain -# $version, which will be replaced by the version of the file (if it could -# be obtained via FILE_VERSION_FILTER) - -WARN_FORMAT = "$file:$line: $text" - -# The WARN_LOGFILE tag can be used to specify a file to which warning -# and error messages should be written. If left blank the output is written -# to stderr. - -WARN_LOGFILE = - -#--------------------------------------------------------------------------- -# configuration options related to the input files -#--------------------------------------------------------------------------- - -# The INPUT tag can be used to specify the files and/or directories that contain -# documented source files. You may enter file names like "myfile.cpp" or -# directories like "/usr/src/myproject". Separate the files or directories -# with spaces. - -INPUT = lmdb.h midl.h mdb.c midl.c - -# This tag can be used to specify the character encoding of the source files -# that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is -# also the default input encoding. Doxygen uses libiconv (or the iconv built -# into libc) for the transcoding. See http://www.gnu.org/software/libiconv for -# the list of possible encodings. - -INPUT_ENCODING = UTF-8 - -# If the value of the INPUT tag contains directories, you can use the -# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp -# and *.h) to filter out the source-files in the directories. If left -# blank the following patterns are tested: -# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx -# *.hpp *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm *.py *.f90 - -FILE_PATTERNS = - -# The RECURSIVE tag can be used to turn specify whether or not subdirectories -# should be searched for input files as well. Possible values are YES and NO. -# If left blank NO is used. - -RECURSIVE = NO - -# The EXCLUDE tag can be used to specify files and/or directories that should -# excluded from the INPUT source files. This way you can easily exclude a -# subdirectory from a directory tree whose root is specified with the INPUT tag. - -EXCLUDE = - -# The EXCLUDE_SYMLINKS tag can be used select whether or not files or -# directories that are symbolic links (a Unix filesystem feature) are excluded -# from the input. - -EXCLUDE_SYMLINKS = NO - -# If the value of the INPUT tag contains directories, you can use the -# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude -# certain files from those directories. Note that the wildcards are matched -# against the file with absolute path, so to exclude all test directories -# for example use the pattern */test/* - -EXCLUDE_PATTERNS = - -# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names -# (namespaces, classes, functions, etc.) that should be excluded from the -# output. The symbol name can be a fully qualified name, a word, or if the -# wildcard * is used, a substring. Examples: ANamespace, AClass, -# AClass::ANamespace, ANamespace::*Test - -EXCLUDE_SYMBOLS = - -# The EXAMPLE_PATH tag can be used to specify one or more files or -# directories that contain example code fragments that are included (see -# the \include command). - -EXAMPLE_PATH = - -# If the value of the EXAMPLE_PATH tag contains directories, you can use the -# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp -# and *.h) to filter out the source-files in the directories. If left -# blank all files are included. - -EXAMPLE_PATTERNS = - -# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be -# searched for input files to be used with the \include or \dontinclude -# commands irrespective of the value of the RECURSIVE tag. -# Possible values are YES and NO. If left blank NO is used. - -EXAMPLE_RECURSIVE = NO - -# The IMAGE_PATH tag can be used to specify one or more files or -# directories that contain image that are included in the documentation (see -# the \image command). - -IMAGE_PATH = - -# The INPUT_FILTER tag can be used to specify a program that doxygen should -# invoke to filter for each input file. Doxygen will invoke the filter program -# by executing (via popen()) the command , where -# is the value of the INPUT_FILTER tag, and is the name of an -# input file. Doxygen will then use the output that the filter program writes -# to standard output. -# If FILTER_PATTERNS is specified, this tag will be -# ignored. - -INPUT_FILTER = - -# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern -# basis. -# Doxygen will compare the file name with each pattern and apply the -# filter if there is a match. -# The filters are a list of the form: -# pattern=filter (like *.cpp=my_cpp_filter). See INPUT_FILTER for further -# info on how filters are used. If FILTER_PATTERNS is empty, INPUT_FILTER -# is applied to all files. - -FILTER_PATTERNS = - -# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using -# INPUT_FILTER) will be used to filter the input files when producing source -# files to browse (i.e. when SOURCE_BROWSER is set to YES). - -FILTER_SOURCE_FILES = NO - -#--------------------------------------------------------------------------- -# configuration options related to source browsing -#--------------------------------------------------------------------------- - -# If the SOURCE_BROWSER tag is set to YES then a list of source files will -# be generated. Documented entities will be cross-referenced with these sources. -# Note: To get rid of all source code in the generated output, make sure also -# VERBATIM_HEADERS is set to NO. - -SOURCE_BROWSER = NO - -# Setting the INLINE_SOURCES tag to YES will include the body -# of functions and classes directly in the documentation. - -INLINE_SOURCES = NO - -# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct -# doxygen to hide any special comment blocks from generated source code -# fragments. Normal C and C++ comments will always remain visible. - -STRIP_CODE_COMMENTS = YES - -# If the REFERENCED_BY_RELATION tag is set to YES -# then for each documented function all documented -# functions referencing it will be listed. - -REFERENCED_BY_RELATION = NO - -# If the REFERENCES_RELATION tag is set to YES -# then for each documented function all documented entities -# called/used by that function will be listed. - -REFERENCES_RELATION = NO - -# If the REFERENCES_LINK_SOURCE tag is set to YES (the default) -# and SOURCE_BROWSER tag is set to YES, then the hyperlinks from -# functions in REFERENCES_RELATION and REFERENCED_BY_RELATION lists will -# link to the source code. -# Otherwise they will link to the documentation. - -REFERENCES_LINK_SOURCE = YES - -# If the USE_HTAGS tag is set to YES then the references to source code -# will point to the HTML generated by the htags(1) tool instead of doxygen -# built-in source browser. The htags tool is part of GNU's global source -# tagging system (see http://www.gnu.org/software/global/global.html). You -# will need version 4.8.6 or higher. - -USE_HTAGS = NO - -# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen -# will generate a verbatim copy of the header file for each class for -# which an include is specified. Set to NO to disable this. - -VERBATIM_HEADERS = YES - -#--------------------------------------------------------------------------- -# configuration options related to the alphabetical class index -#--------------------------------------------------------------------------- - -# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index -# of all compounds will be generated. Enable this if the project -# contains a lot of classes, structs, unions or interfaces. - -ALPHABETICAL_INDEX = YES - -# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then -# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns -# in which this list will be split (can be a number in the range [1..20]) - -COLS_IN_ALPHA_INDEX = 5 - -# In case all classes in a project start with a common prefix, all -# classes will be put under the same header in the alphabetical index. -# The IGNORE_PREFIX tag can be used to specify one or more prefixes that -# should be ignored while generating the index headers. - -IGNORE_PREFIX = - -#--------------------------------------------------------------------------- -# configuration options related to the HTML output -#--------------------------------------------------------------------------- - -# If the GENERATE_HTML tag is set to YES (the default) Doxygen will -# generate HTML output. - -GENERATE_HTML = YES - -# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `html' will be used as the default path. - -HTML_OUTPUT = html - -# The HTML_FILE_EXTENSION tag can be used to specify the file extension for -# each generated HTML page (for example: .htm,.php,.asp). If it is left blank -# doxygen will generate files with .html extension. - -HTML_FILE_EXTENSION = .html - -# The HTML_HEADER tag can be used to specify a personal HTML header for -# each generated HTML page. If it is left blank doxygen will generate a -# standard header. - -HTML_HEADER = - -# The HTML_FOOTER tag can be used to specify a personal HTML footer for -# each generated HTML page. If it is left blank doxygen will generate a -# standard footer. - -HTML_FOOTER = - -# The HTML_STYLESHEET tag can be used to specify a user-defined cascading -# style sheet that is used by each HTML page. It can be used to -# fine-tune the look of the HTML output. If the tag is left blank doxygen -# will generate a default style sheet. Note that doxygen will try to copy -# the style sheet file to the HTML output directory, so don't put your own -# stylesheet in the HTML output directory as well, or it will be erased! - -HTML_STYLESHEET = - -# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. -# Doxygen will adjust the colors in the stylesheet and background images -# according to this color. Hue is specified as an angle on a colorwheel, -# see http://en.wikipedia.org/wiki/Hue for more information. -# For instance the value 0 represents red, 60 is yellow, 120 is green, -# 180 is cyan, 240 is blue, 300 purple, and 360 is red again. -# The allowed range is 0 to 359. - -HTML_COLORSTYLE_HUE = 220 - -# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of -# the colors in the HTML output. For a value of 0 the output will use -# grayscales only. A value of 255 will produce the most vivid colors. - -HTML_COLORSTYLE_SAT = 100 - -# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to -# the luminance component of the colors in the HTML output. Values below -# 100 gradually make the output lighter, whereas values above 100 make -# the output darker. The value divided by 100 is the actual gamma applied, -# so 80 represents a gamma of 0.8, The value 220 represents a gamma of 2.2, -# and 100 does not change the gamma. - -HTML_COLORSTYLE_GAMMA = 80 - -# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML -# page will contain the date and time when the page was generated. Setting -# this to NO can help when comparing the output of multiple runs. - -HTML_TIMESTAMP = YES - -# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes, -# files or namespaces will be aligned in HTML using tables. If set to -# NO a bullet list will be used. - -HTML_ALIGN_MEMBERS = YES - -# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML -# documentation will contain sections that can be hidden and shown after the -# page has loaded. For this to work a browser that supports -# JavaScript and DHTML is required (for instance Mozilla 1.0+, Firefox -# Netscape 6.0+, Internet explorer 5.0+, Konqueror, or Safari). - -HTML_DYNAMIC_SECTIONS = NO - -# If the GENERATE_DOCSET tag is set to YES, additional index files -# will be generated that can be used as input for Apple's Xcode 3 -# integrated development environment, introduced with OSX 10.5 (Leopard). -# To create a documentation set, doxygen will generate a Makefile in the -# HTML output directory. Running make will produce the docset in that -# directory and running "make install" will install the docset in -# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find -# it at startup. -# See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html -# for more information. - -GENERATE_DOCSET = NO - -# When GENERATE_DOCSET tag is set to YES, this tag determines the name of the -# feed. A documentation feed provides an umbrella under which multiple -# documentation sets from a single provider (such as a company or product suite) -# can be grouped. - -DOCSET_FEEDNAME = "Doxygen generated docs" - -# When GENERATE_DOCSET tag is set to YES, this tag specifies a string that -# should uniquely identify the documentation set bundle. This should be a -# reverse domain-name style string, e.g. com.mycompany.MyDocSet. Doxygen -# will append .docset to the name. - -DOCSET_BUNDLE_ID = org.doxygen.Project - -# When GENERATE_PUBLISHER_ID tag specifies a string that should uniquely identify -# the documentation publisher. This should be a reverse domain-name style -# string, e.g. com.mycompany.MyDocSet.documentation. - -DOCSET_PUBLISHER_ID = org.doxygen.Publisher - -# The GENERATE_PUBLISHER_NAME tag identifies the documentation publisher. - -DOCSET_PUBLISHER_NAME = Publisher - -# If the GENERATE_HTMLHELP tag is set to YES, additional index files -# will be generated that can be used as input for tools like the -# Microsoft HTML help workshop to generate a compiled HTML help file (.chm) -# of the generated HTML documentation. - -GENERATE_HTMLHELP = NO - -# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can -# be used to specify the file name of the resulting .chm file. You -# can add a path in front of the file if the result should not be -# written to the html output directory. - -CHM_FILE = - -# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can -# be used to specify the location (absolute path including file name) of -# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run -# the HTML help compiler on the generated index.hhp. - -HHC_LOCATION = - -# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag -# controls if a separate .chi index file is generated (YES) or that -# it should be included in the master .chm file (NO). - -GENERATE_CHI = NO - -# If the GENERATE_HTMLHELP tag is set to YES, the CHM_INDEX_ENCODING -# is used to encode HtmlHelp index (hhk), content (hhc) and project file -# content. - -CHM_INDEX_ENCODING = - -# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag -# controls whether a binary table of contents is generated (YES) or a -# normal table of contents (NO) in the .chm file. - -BINARY_TOC = NO - -# The TOC_EXPAND flag can be set to YES to add extra items for group members -# to the contents of the HTML help documentation and to the tree view. - -TOC_EXPAND = NO - -# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and -# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated -# that can be used as input for Qt's qhelpgenerator to generate a -# Qt Compressed Help (.qch) of the generated HTML documentation. - -GENERATE_QHP = NO - -# If the QHG_LOCATION tag is specified, the QCH_FILE tag can -# be used to specify the file name of the resulting .qch file. -# The path specified is relative to the HTML output folder. - -QCH_FILE = - -# The QHP_NAMESPACE tag specifies the namespace to use when generating -# Qt Help Project output. For more information please see -# http://doc.trolltech.com/qthelpproject.html#namespace - -QHP_NAMESPACE = org.doxygen.Project - -# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating -# Qt Help Project output. For more information please see -# http://doc.trolltech.com/qthelpproject.html#virtual-folders - -QHP_VIRTUAL_FOLDER = doc - -# If QHP_CUST_FILTER_NAME is set, it specifies the name of a custom filter to -# add. For more information please see -# http://doc.trolltech.com/qthelpproject.html#custom-filters - -QHP_CUST_FILTER_NAME = - -# The QHP_CUST_FILT_ATTRS tag specifies the list of the attributes of the -# custom filter to add. For more information please see -# -# Qt Help Project / Custom Filters. - -QHP_CUST_FILTER_ATTRS = - -# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this -# project's -# filter section matches. -# -# Qt Help Project / Filter Attributes. - -QHP_SECT_FILTER_ATTRS = - -# If the GENERATE_QHP tag is set to YES, the QHG_LOCATION tag can -# be used to specify the location of Qt's qhelpgenerator. -# If non-empty doxygen will try to run qhelpgenerator on the generated -# .qhp file. - -QHG_LOCATION = - -# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files -# will be generated, which together with the HTML files, form an Eclipse help -# plugin. To install this plugin and make it available under the help contents -# menu in Eclipse, the contents of the directory containing the HTML and XML -# files needs to be copied into the plugins directory of eclipse. The name of -# the directory within the plugins directory should be the same as -# the ECLIPSE_DOC_ID value. After copying Eclipse needs to be restarted before -# the help appears. - -GENERATE_ECLIPSEHELP = NO - -# A unique identifier for the eclipse help plugin. When installing the plugin -# the directory name containing the HTML and XML files should also have -# this name. - -ECLIPSE_DOC_ID = org.doxygen.Project - -# The DISABLE_INDEX tag can be used to turn on/off the condensed index at -# top of each HTML page. The value NO (the default) enables the index and -# the value YES disables it. - -DISABLE_INDEX = NO - -# This tag can be used to set the number of enum values (range [1..20]) -# that doxygen will group on one line in the generated HTML documentation. - -ENUM_VALUES_PER_LINE = 4 - -# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index -# structure should be generated to display hierarchical information. -# If the tag value is set to YES, a side panel will be generated -# containing a tree-like index structure (just like the one that -# is generated for HTML Help). For this to work a browser that supports -# JavaScript, DHTML, CSS and frames is required (i.e. any modern browser). -# Windows users are probably better off using the HTML help feature. - -GENERATE_TREEVIEW = NO - -# By enabling USE_INLINE_TREES, doxygen will generate the Groups, Directories, -# and Class Hierarchy pages using a tree view instead of an ordered list. - -USE_INLINE_TREES = NO - -# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be -# used to set the initial width (in pixels) of the frame in which the tree -# is shown. - -TREEVIEW_WIDTH = 250 - -# When the EXT_LINKS_IN_WINDOW option is set to YES doxygen will open -# links to external symbols imported via tag files in a separate window. - -EXT_LINKS_IN_WINDOW = NO - -# Use this tag to change the font size of Latex formulas included -# as images in the HTML documentation. The default is 10. Note that -# when you change the font size after a successful doxygen run you need -# to manually remove any form_*.png images from the HTML output directory -# to force them to be regenerated. - -FORMULA_FONTSIZE = 10 - -# Use the FORMULA_TRANPARENT tag to determine whether or not the images -# generated for formulas are transparent PNGs. Transparent PNGs are -# not supported properly for IE 6.0, but are supported on all modern browsers. -# Note that when changing this option you need to delete any form_*.png files -# in the HTML output before the changes have effect. - -FORMULA_TRANSPARENT = YES - -# When the SEARCHENGINE tag is enabled doxygen will generate a search box -# for the HTML output. The underlying search engine uses javascript -# and DHTML and should work on any modern browser. Note that when using -# HTML help (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets -# (GENERATE_DOCSET) there is already a search function so this one should -# typically be disabled. For large projects the javascript based search engine -# can be slow, then enabling SERVER_BASED_SEARCH may provide a better solution. - -SEARCHENGINE = YES - -# When the SERVER_BASED_SEARCH tag is enabled the search engine will be -# implemented using a PHP enabled web server instead of at the web client -# using Javascript. Doxygen will generate the search PHP script and index -# file to put on the web server. The advantage of the server -# based approach is that it scales better to large projects and allows -# full text search. The disadvances is that it is more difficult to setup -# and does not have live searching capabilities. - -SERVER_BASED_SEARCH = NO - -#--------------------------------------------------------------------------- -# configuration options related to the LaTeX output -#--------------------------------------------------------------------------- - -# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will -# generate Latex output. - -GENERATE_LATEX = NO - -# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `latex' will be used as the default path. - -LATEX_OUTPUT = latex - -# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be -# invoked. If left blank `latex' will be used as the default command name. -# Note that when enabling USE_PDFLATEX this option is only used for -# generating bitmaps for formulas in the HTML output, but not in the -# Makefile that is written to the output directory. - -LATEX_CMD_NAME = latex - -# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to -# generate index for LaTeX. If left blank `makeindex' will be used as the -# default command name. - -MAKEINDEX_CMD_NAME = makeindex - -# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact -# LaTeX documents. This may be useful for small projects and may help to -# save some trees in general. - -COMPACT_LATEX = NO - -# The PAPER_TYPE tag can be used to set the paper type that is used -# by the printer. Possible values are: a4, a4wide, letter, legal and -# executive. If left blank a4wide will be used. - -PAPER_TYPE = a4wide - -# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX -# packages that should be included in the LaTeX output. - -EXTRA_PACKAGES = - -# The LATEX_HEADER tag can be used to specify a personal LaTeX header for -# the generated latex document. The header should contain everything until -# the first chapter. If it is left blank doxygen will generate a -# standard header. Notice: only use this tag if you know what you are doing! - -LATEX_HEADER = - -# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated -# is prepared for conversion to pdf (using ps2pdf). The pdf file will -# contain links (just like the HTML output) instead of page references -# This makes the output suitable for online browsing using a pdf viewer. - -PDF_HYPERLINKS = YES - -# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of -# plain latex in the generated Makefile. Set this option to YES to get a -# higher quality PDF documentation. - -USE_PDFLATEX = YES - -# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode. -# command to the generated LaTeX files. This will instruct LaTeX to keep -# running if errors occur, instead of asking the user for help. -# This option is also used when generating formulas in HTML. - -LATEX_BATCHMODE = NO - -# If LATEX_HIDE_INDICES is set to YES then doxygen will not -# include the index chapters (such as File Index, Compound Index, etc.) -# in the output. - -LATEX_HIDE_INDICES = NO - -# If LATEX_SOURCE_CODE is set to YES then doxygen will include -# source code with syntax highlighting in the LaTeX output. -# Note that which sources are shown also depends on other settings -# such as SOURCE_BROWSER. - -LATEX_SOURCE_CODE = NO - -#--------------------------------------------------------------------------- -# configuration options related to the RTF output -#--------------------------------------------------------------------------- - -# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output -# The RTF output is optimized for Word 97 and may not look very pretty with -# other RTF readers or editors. - -GENERATE_RTF = NO - -# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `rtf' will be used as the default path. - -RTF_OUTPUT = rtf - -# If the COMPACT_RTF tag is set to YES Doxygen generates more compact -# RTF documents. This may be useful for small projects and may help to -# save some trees in general. - -COMPACT_RTF = NO - -# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated -# will contain hyperlink fields. The RTF file will -# contain links (just like the HTML output) instead of page references. -# This makes the output suitable for online browsing using WORD or other -# programs which support those fields. -# Note: wordpad (write) and others do not support links. - -RTF_HYPERLINKS = NO - -# Load stylesheet definitions from file. Syntax is similar to doxygen's -# config file, i.e. a series of assignments. You only have to provide -# replacements, missing definitions are set to their default value. - -RTF_STYLESHEET_FILE = - -# Set optional variables used in the generation of an rtf document. -# Syntax is similar to doxygen's config file. - -RTF_EXTENSIONS_FILE = - -#--------------------------------------------------------------------------- -# configuration options related to the man page output -#--------------------------------------------------------------------------- - -# If the GENERATE_MAN tag is set to YES (the default) Doxygen will -# generate man pages - -GENERATE_MAN = YES - -# The MAN_OUTPUT tag is used to specify where the man pages will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `man' will be used as the default path. - -MAN_OUTPUT = man - -# The MAN_EXTENSION tag determines the extension that is added to -# the generated man pages (default is the subroutine's section .3) - -MAN_EXTENSION = .3 - -# If the MAN_LINKS tag is set to YES and Doxygen generates man output, -# then it will generate one additional man file for each entity -# documented in the real man page(s). These additional files -# only source the real man page, but without them the man command -# would be unable to find the correct page. The default is NO. - -MAN_LINKS = NO - -#--------------------------------------------------------------------------- -# configuration options related to the XML output -#--------------------------------------------------------------------------- - -# If the GENERATE_XML tag is set to YES Doxygen will -# generate an XML file that captures the structure of -# the code including all documentation. - -GENERATE_XML = NO - -# The XML_OUTPUT tag is used to specify where the XML pages will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `xml' will be used as the default path. - -XML_OUTPUT = xml - -# The XML_SCHEMA tag can be used to specify an XML schema, -# which can be used by a validating XML parser to check the -# syntax of the XML files. - -XML_SCHEMA = - -# The XML_DTD tag can be used to specify an XML DTD, -# which can be used by a validating XML parser to check the -# syntax of the XML files. - -XML_DTD = - -# If the XML_PROGRAMLISTING tag is set to YES Doxygen will -# dump the program listings (including syntax highlighting -# and cross-referencing information) to the XML output. Note that -# enabling this will significantly increase the size of the XML output. - -XML_PROGRAMLISTING = YES - -#--------------------------------------------------------------------------- -# configuration options for the AutoGen Definitions output -#--------------------------------------------------------------------------- - -# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will -# generate an AutoGen Definitions (see autogen.sf.net) file -# that captures the structure of the code including all -# documentation. Note that this feature is still experimental -# and incomplete at the moment. - -GENERATE_AUTOGEN_DEF = NO - -#--------------------------------------------------------------------------- -# configuration options related to the Perl module output -#--------------------------------------------------------------------------- - -# If the GENERATE_PERLMOD tag is set to YES Doxygen will -# generate a Perl module file that captures the structure of -# the code including all documentation. Note that this -# feature is still experimental and incomplete at the -# moment. - -GENERATE_PERLMOD = NO - -# If the PERLMOD_LATEX tag is set to YES Doxygen will generate -# the necessary Makefile rules, Perl scripts and LaTeX code to be able -# to generate PDF and DVI output from the Perl module output. - -PERLMOD_LATEX = NO - -# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be -# nicely formatted so it can be parsed by a human reader. -# This is useful -# if you want to understand what is going on. -# On the other hand, if this -# tag is set to NO the size of the Perl module output will be much smaller -# and Perl will parse it just the same. - -PERLMOD_PRETTY = YES - -# The names of the make variables in the generated doxyrules.make file -# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. -# This is useful so different doxyrules.make files included by the same -# Makefile don't overwrite each other's variables. - -PERLMOD_MAKEVAR_PREFIX = - -#--------------------------------------------------------------------------- -# Configuration options related to the preprocessor -#--------------------------------------------------------------------------- - -# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will -# evaluate all C-preprocessor directives found in the sources and include -# files. - -ENABLE_PREPROCESSING = YES - -# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro -# names in the source code. If set to NO (the default) only conditional -# compilation will be performed. Macro expansion can be done in a controlled -# way by setting EXPAND_ONLY_PREDEF to YES. - -MACRO_EXPANSION = NO - -# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES -# then the macro expansion is limited to the macros specified with the -# PREDEFINED and EXPAND_AS_DEFINED tags. - -EXPAND_ONLY_PREDEF = NO - -# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files -# in the INCLUDE_PATH (see below) will be search if a #include is found. - -SEARCH_INCLUDES = YES - -# The INCLUDE_PATH tag can be used to specify one or more directories that -# contain include files that are not input files but should be processed by -# the preprocessor. - -INCLUDE_PATH = - -# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard -# patterns (like *.h and *.hpp) to filter out the header-files in the -# directories. If left blank, the patterns specified with FILE_PATTERNS will -# be used. - -INCLUDE_FILE_PATTERNS = - -# The PREDEFINED tag can be used to specify one or more macro names that -# are defined before the preprocessor is started (similar to the -D option of -# gcc). The argument of the tag is a list of macros of the form: name -# or name=definition (no spaces). If the definition and the = are -# omitted =1 is assumed. To prevent a macro definition from being -# undefined via #undef or recursively expanded use the := operator -# instead of the = operator. - -PREDEFINED = DEBUG=2 __GNUC__=1 - -# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then -# this tag can be used to specify a list of macro names that should be expanded. -# The macro definition that is found in the sources will be used. -# Use the PREDEFINED tag if you want to use a different macro definition. - -EXPAND_AS_DEFINED = - -# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then -# doxygen's preprocessor will remove all function-like macros that are alone -# on a line, have an all uppercase name, and do not end with a semicolon. Such -# function macros are typically used for boiler-plate code, and will confuse -# the parser if not removed. - -SKIP_FUNCTION_MACROS = YES - -#--------------------------------------------------------------------------- -# Configuration::additions related to external references -#--------------------------------------------------------------------------- - -# The TAGFILES option can be used to specify one or more tagfiles. -# Optionally an initial location of the external documentation -# can be added for each tagfile. The format of a tag file without -# this location is as follows: -# -# TAGFILES = file1 file2 ... -# Adding location for the tag files is done as follows: -# -# TAGFILES = file1=loc1 "file2 = loc2" ... -# where "loc1" and "loc2" can be relative or absolute paths or -# URLs. If a location is present for each tag, the installdox tool -# does not have to be run to correct the links. -# Note that each tag file must have a unique name -# (where the name does NOT include the path) -# If a tag file is not located in the directory in which doxygen -# is run, you must also specify the path to the tagfile here. - -TAGFILES = tooltag=./man1 - -# When a file name is specified after GENERATE_TAGFILE, doxygen will create -# a tag file that is based on the input files it reads. - -GENERATE_TAGFILE = - -# If the ALLEXTERNALS tag is set to YES all external classes will be listed -# in the class index. If set to NO only the inherited external classes -# will be listed. - -ALLEXTERNALS = NO - -# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed -# in the modules index. If set to NO, only the current project's groups will -# be listed. - -EXTERNAL_GROUPS = YES - -# The PERL_PATH should be the absolute path and name of the perl script -# interpreter (i.e. the result of `which perl'). - -PERL_PATH = /usr/bin/perl - -#--------------------------------------------------------------------------- -# Configuration options related to the dot tool -#--------------------------------------------------------------------------- - -# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will -# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base -# or super classes. Setting the tag to NO turns the diagrams off. Note that -# this option is superseded by the HAVE_DOT option below. This is only a -# fallback. It is recommended to install and use dot, since it yields more -# powerful graphs. - -CLASS_DIAGRAMS = YES - -# You can define message sequence charts within doxygen comments using the \msc -# command. Doxygen will then run the mscgen tool (see -# http://www.mcternan.me.uk/mscgen/) to produce the chart and insert it in the -# documentation. The MSCGEN_PATH tag allows you to specify the directory where -# the mscgen tool resides. If left empty the tool is assumed to be found in the -# default search path. - -MSCGEN_PATH = - -# If set to YES, the inheritance and collaboration graphs will hide -# inheritance and usage relations if the target is undocumented -# or is not a class. - -HIDE_UNDOC_RELATIONS = YES - -# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is -# available from the path. This tool is part of Graphviz, a graph visualization -# toolkit from AT&T and Lucent Bell Labs. The other options in this section -# have no effect if this option is set to NO (the default) - -HAVE_DOT = NO - -# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is -# allowed to run in parallel. When set to 0 (the default) doxygen will -# base this on the number of processors available in the system. You can set it -# explicitly to a value larger than 0 to get control over the balance -# between CPU load and processing speed. - -DOT_NUM_THREADS = 0 - -# By default doxygen will write a font called FreeSans.ttf to the output -# directory and reference it in all dot files that doxygen generates. This -# font does not include all possible unicode characters however, so when you need -# these (or just want a differently looking font) you can specify the font name -# using DOT_FONTNAME. You need need to make sure dot is able to find the font, -# which can be done by putting it in a standard location or by setting the -# DOTFONTPATH environment variable or by setting DOT_FONTPATH to the directory -# containing the font. - -DOT_FONTNAME = FreeSans.ttf - -# The DOT_FONTSIZE tag can be used to set the size of the font of dot graphs. -# The default size is 10pt. - -DOT_FONTSIZE = 10 - -# By default doxygen will tell dot to use the output directory to look for the -# FreeSans.ttf font (which doxygen will put there itself). If you specify a -# different font using DOT_FONTNAME you can set the path where dot -# can find it using this tag. - -DOT_FONTPATH = - -# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen -# will generate a graph for each documented class showing the direct and -# indirect inheritance relations. Setting this tag to YES will force the -# the CLASS_DIAGRAMS tag to NO. - -CLASS_GRAPH = YES - -# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen -# will generate a graph for each documented class showing the direct and -# indirect implementation dependencies (inheritance, containment, and -# class references variables) of the class with other documented classes. - -COLLABORATION_GRAPH = YES - -# If the GROUP_GRAPHS and HAVE_DOT tags are set to YES then doxygen -# will generate a graph for groups, showing the direct groups dependencies - -GROUP_GRAPHS = YES - -# If the UML_LOOK tag is set to YES doxygen will generate inheritance and -# collaboration diagrams in a style similar to the OMG's Unified Modeling -# Language. - -UML_LOOK = NO - -# If set to YES, the inheritance and collaboration graphs will show the -# relations between templates and their instances. - -TEMPLATE_RELATIONS = NO - -# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT -# tags are set to YES then doxygen will generate a graph for each documented -# file showing the direct and indirect include dependencies of the file with -# other documented files. - -INCLUDE_GRAPH = YES - -# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and -# HAVE_DOT tags are set to YES then doxygen will generate a graph for each -# documented header file showing the documented files that directly or -# indirectly include this file. - -INCLUDED_BY_GRAPH = YES - -# If the CALL_GRAPH and HAVE_DOT options are set to YES then -# doxygen will generate a call dependency graph for every global function -# or class method. Note that enabling this option will significantly increase -# the time of a run. So in most cases it will be better to enable call graphs -# for selected functions only using the \callgraph command. - -CALL_GRAPH = NO - -# If the CALLER_GRAPH and HAVE_DOT tags are set to YES then -# doxygen will generate a caller dependency graph for every global function -# or class method. Note that enabling this option will significantly increase -# the time of a run. So in most cases it will be better to enable caller -# graphs for selected functions only using the \callergraph command. - -CALLER_GRAPH = NO - -# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen -# will graphical hierarchy of all classes instead of a textual one. - -GRAPHICAL_HIERARCHY = YES - -# If the DIRECTORY_GRAPH, SHOW_DIRECTORIES and HAVE_DOT tags are set to YES -# then doxygen will show the dependencies a directory has on other directories -# in a graphical way. The dependency relations are determined by the #include -# relations between the files in the directories. - -DIRECTORY_GRAPH = YES - -# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images -# generated by dot. Possible values are png, jpg, or gif -# If left blank png will be used. - -DOT_IMAGE_FORMAT = png - -# The tag DOT_PATH can be used to specify the path where the dot tool can be -# found. If left blank, it is assumed the dot tool can be found in the path. - -DOT_PATH = - -# The DOTFILE_DIRS tag can be used to specify one or more directories that -# contain dot files that are included in the documentation (see the -# \dotfile command). - -DOTFILE_DIRS = - -# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of -# nodes that will be shown in the graph. If the number of nodes in a graph -# becomes larger than this value, doxygen will truncate the graph, which is -# visualized by representing a node as a red box. Note that doxygen if the -# number of direct children of the root node in a graph is already larger than -# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note -# that the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH. - -DOT_GRAPH_MAX_NODES = 50 - -# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the -# graphs generated by dot. A depth value of 3 means that only nodes reachable -# from the root by following a path via at most 3 edges will be shown. Nodes -# that lay further from the root node will be omitted. Note that setting this -# option to 1 or 2 may greatly reduce the computation time needed for large -# code bases. Also note that the size of a graph can be further restricted by -# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction. - -MAX_DOT_GRAPH_DEPTH = 0 - -# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent -# background. This is disabled by default, because dot on Windows does not -# seem to support this out of the box. Warning: Depending on the platform used, -# enabling this option may lead to badly anti-aliased labels on the edges of -# a graph (i.e. they become hard to read). - -DOT_TRANSPARENT = NO - -# Set the DOT_MULTI_TARGETS tag to YES allow dot to generate multiple output -# files in one run (i.e. multiple -o and -T options on the command line). This -# makes dot run faster, but since only newer versions of dot (>1.8.10) -# support this, this feature is disabled by default. - -DOT_MULTI_TARGETS = YES - -# If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will -# generate a legend page explaining the meaning of the various boxes and -# arrows in the dot generated graphs. - -GENERATE_LEGEND = YES - -# If the DOT_CLEANUP tag is set to YES (the default) Doxygen will -# remove the intermediate dot files that are used to generate -# the various graphs. - -DOT_CLEANUP = YES diff --git a/external/db_drivers/liblmdb64/LICENSE b/external/db_drivers/liblmdb64/LICENSE deleted file mode 100644 index 05ad7571e..000000000 --- a/external/db_drivers/liblmdb64/LICENSE +++ /dev/null @@ -1,47 +0,0 @@ -The OpenLDAP Public License - Version 2.8, 17 August 2003 - -Redistribution and use of this software and associated documentation -("Software"), with or without modification, are permitted provided -that the following conditions are met: - -1. Redistributions in source form must retain copyright statements - and notices, - -2. Redistributions in binary form must reproduce applicable copyright - statements and notices, this list of conditions, and the following - disclaimer in the documentation and/or other materials provided - with the distribution, and - -3. Redistributions must contain a verbatim copy of this document. - -The OpenLDAP Foundation may revise this license from time to time. -Each revision is distinguished by a version number. You may use -this Software under terms of this license revision or under the -terms of any subsequent revision of the license. - -THIS SOFTWARE IS PROVIDED BY THE OPENLDAP FOUNDATION AND ITS -CONTRIBUTORS ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, -INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY -AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT -SHALL THE OPENLDAP FOUNDATION, ITS CONTRIBUTORS, OR THE AUTHOR(S) -OR OWNER(S) OF THE SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, -INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. - -The names of the authors and copyright holders must not be used in -advertising or otherwise to promote the sale, use or other dealing -in this Software without specific, written prior permission. Title -to copyright in this Software shall at all times remain with copyright -holders. - -OpenLDAP is a registered trademark of the OpenLDAP Foundation. - -Copyright 1999-2003 The OpenLDAP Foundation, Redwood City, -California, USA. All Rights Reserved. Permission to copy and -distribute verbatim copies of this document is granted. diff --git a/external/db_drivers/liblmdb64/lmdb.h b/external/db_drivers/liblmdb64/lmdb.h deleted file mode 100644 index 2f523579c..000000000 --- a/external/db_drivers/liblmdb64/lmdb.h +++ /dev/null @@ -1,1556 +0,0 @@ -/** @file lmdb.h - * @brief Lightning memory-mapped database library - * - * @mainpage Lightning Memory-Mapped Database Manager (LMDB) - * - * @section intro_sec Introduction - * LMDB is a Btree-based database management library modeled loosely on the - * BerkeleyDB API, but much simplified. The entire database is exposed - * in a memory map, and all data fetches return data directly - * from the mapped memory, so no malloc's or memcpy's occur during - * data fetches. As such, the library is extremely simple because it - * requires no page caching layer of its own, and it is extremely high - * performance and memory-efficient. It is also fully transactional with - * full ACID semantics, and when the memory map is read-only, the - * database integrity cannot be corrupted by stray pointer writes from - * application code. - * - * The library is fully thread-aware and supports concurrent read/write - * access from multiple processes and threads. Data pages use a copy-on- - * write strategy so no active data pages are ever overwritten, which - * also provides resistance to corruption and eliminates the need of any - * special recovery procedures after a system crash. Writes are fully - * serialized; only one write transaction may be active at a time, which - * guarantees that writers can never deadlock. The database structure is - * multi-versioned so readers run with no locks; writers cannot block - * readers, and readers don't block writers. - * - * Unlike other well-known database mechanisms which use either write-ahead - * transaction logs or append-only data writes, LMDB requires no maintenance - * during operation. Both write-ahead loggers and append-only databases - * require periodic checkpointing and/or compaction of their log or database - * files otherwise they grow without bound. LMDB tracks free pages within - * the database and re-uses them for new write operations, so the database - * size does not grow without bound in normal use. - * - * The memory map can be used as a read-only or read-write map. It is - * read-only by default as this provides total immunity to corruption. - * Using read-write mode offers much higher write performance, but adds - * the possibility for stray application writes thru pointers to silently - * corrupt the database. Of course if your application code is known to - * be bug-free (...) then this is not an issue. - * - * @section caveats_sec Caveats - * Troubleshooting the lock file, plus semaphores on BSD systems: - * - * - A broken lockfile can cause sync issues. - * Stale reader transactions left behind by an aborted program - * cause further writes to grow the database quickly, and - * stale locks can block further operation. - * - * Fix: Check for stale readers periodically, using the - * #mdb_reader_check function or the \ref mdb_stat_1 "mdb_stat" tool. Or just - * make all programs using the database close it; the lockfile - * is always reset on first open of the environment. - * - * - On BSD systems or others configured with MDB_USE_POSIX_SEM, - * startup can fail due to semaphores owned by another userid. - * - * Fix: Open and close the database as the user which owns the - * semaphores (likely last user) or as root, while no other - * process is using the database. - * - * Restrictions/caveats (in addition to those listed for some functions): - * - * - Only the database owner should normally use the database on - * BSD systems or when otherwise configured with MDB_USE_POSIX_SEM. - * Multiple users can cause startup to fail later, as noted above. - * - * - There is normally no pure read-only mode, since readers need write - * access to locks and lock file. Exceptions: On read-only filesystems - * or with the #MDB_NOLOCK flag described under #mdb_env_open(). - * - * - By default, in versions before 0.9.10, unused portions of the data - * file might receive garbage data from memory freed by other code. - * (This does not happen when using the #MDB_WRITEMAP flag.) As of - * 0.9.10 the default behavior is to initialize such memory before - * writing to the data file. Since there may be a slight performance - * cost due to this initialization, applications may disable it using - * the #MDB_NOMEMINIT flag. Applications handling sensitive data - * which must not be written should not use this flag. This flag is - * irrelevant when using #MDB_WRITEMAP. - * - * - A thread can only use one transaction at a time, plus any child - * transactions. Each transaction belongs to one thread. See below. - * The #MDB_NOTLS flag changes this for read-only transactions. - * - * - Use an MDB_env* in the process which opened it, without fork()ing. - * - * - Do not have open an LMDB database twice in the same process at - * the same time. Not even from a plain open() call - close()ing it - * breaks flock() advisory locking. - * - * - Avoid long-lived transactions. Read transactions prevent - * reuse of pages freed by newer write transactions, thus the - * database can grow quickly. Write transactions prevent - * other write transactions, since writes are serialized. - * - * - Avoid suspending a process with active transactions. These - * would then be "long-lived" as above. Also read transactions - * suspended when writers commit could sometimes see wrong data. - * - * ...when several processes can use a database concurrently: - * - * - Avoid aborting a process with an active transaction. - * The transaction becomes "long-lived" as above until a check - * for stale readers is performed or the lockfile is reset, - * since the process may not remove it from the lockfile. - * - * - If you do that anyway, do a periodic check for stale readers. Or - * close the environment once in a while, so the lockfile can get reset. - * - * - Do not use LMDB databases on remote filesystems, even between - * processes on the same host. This breaks flock() on some OSes, - * possibly memory map sync, and certainly sync between programs - * on different hosts. - * - * - Opening a database can fail if another process is opening or - * closing it at exactly the same time. - * - * @author Howard Chu, Symas Corporation. - * - * @copyright Copyright 2011-2015 Howard Chu, Symas Corp. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - * - * @par Derived From: - * This code is derived from btree.c written by Martin Hedenfalk. - * - * Copyright (c) 2009, 2010 Martin Hedenfalk - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ -#ifndef _LMDB_H_ -#define _LMDB_H_ - -#include - -#ifdef __cplusplus -extern "C" { -#endif - -/** Unix permissions for creating files, or dummy definition for Windows */ -#ifdef _MSC_VER -typedef int mdb_mode_t; -#else -typedef mode_t mdb_mode_t; -#endif - -/** An abstraction for a file handle. - * On POSIX systems file handles are small integers. On Windows - * they're opaque pointers. - */ -#ifdef _WIN32 -typedef void *mdb_filehandle_t; -#else -typedef int mdb_filehandle_t; -#endif - -/** @defgroup mdb LMDB API - * @{ - * @brief OpenLDAP Lightning Memory-Mapped Database Manager - */ -/** @defgroup Version Version Macros - * @{ - */ -/** Library major version */ -#define MDB_VERSION_MAJOR 0 -/** Library minor version */ -#define MDB_VERSION_MINOR 9 -/** Library patch version */ -#define MDB_VERSION_PATCH 15 - -/** Combine args a,b,c into a single integer for easy version comparisons */ -#define MDB_VERINT(a,b,c) (((a) << 24) | ((b) << 16) | (c)) - -/** The full library version as a single integer */ -#define MDB_VERSION_FULL \ - MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH) - -/** The release date of this library version */ -#define MDB_VERSION_DATE "June 19, 2015" - -/** A stringifier for the version info */ -#define MDB_VERSTR(a,b,c,d) "LMDB " #a "." #b "." #c ": (" d ")" - -/** A helper for the stringifier macro */ -#define MDB_VERFOO(a,b,c,d) MDB_VERSTR(a,b,c,d) - -/** The full library version as a C string */ -#define MDB_VERSION_STRING \ - MDB_VERFOO(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH,MDB_VERSION_DATE) -/** @} */ - -/** @brief Opaque structure for a database environment. - * - * A DB environment supports multiple databases, all residing in the same - * shared-memory map. - */ -typedef struct MDB_env MDB_env; - -/** @brief Opaque structure for a transaction handle. - * - * All database operations require a transaction handle. Transactions may be - * read-only or read-write. - */ -typedef struct MDB_txn MDB_txn; - -/** @brief A handle for an individual database in the DB environment. */ -typedef unsigned int MDB_dbi; - -/** @brief Opaque structure for navigating through a database */ -typedef struct MDB_cursor MDB_cursor; - -/** @brief Generic structure used for passing keys and data in and out - * of the database. - * - * Values returned from the database are valid only until a subsequent - * update operation, or the end of the transaction. Do not modify or - * free them, they commonly point into the database itself. - * - * Key sizes must be between 1 and #mdb_env_get_maxkeysize() inclusive. - * The same applies to data sizes in databases with the #MDB_DUPSORT flag. - * Other data items can in theory be from 0 to 0xffffffff bytes long. - */ -typedef struct MDB_val { - size_t mv_size; /**< size of the data item */ - void *mv_data; /**< address of the data item */ -} MDB_val; - -/** @brief A callback function used to compare two keys in a database */ -typedef int (MDB_cmp_func)(const MDB_val *a, const MDB_val *b); - -/** @brief A callback function used to relocate a position-dependent data item - * in a fixed-address database. - * - * The \b newptr gives the item's desired address in - * the memory map, and \b oldptr gives its previous address. The item's actual - * data resides at the address in \b item. This callback is expected to walk - * through the fields of the record in \b item and modify any - * values based at the \b oldptr address to be relative to the \b newptr address. - * @param[in,out] item The item that is to be relocated. - * @param[in] oldptr The previous address. - * @param[in] newptr The new address to relocate to. - * @param[in] relctx An application-provided context, set by #mdb_set_relctx(). - * @todo This feature is currently unimplemented. - */ -typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *relctx); - -/** @defgroup mdb_env Environment Flags - * @{ - */ - /** mmap at a fixed address (experimental) */ -#define MDB_FIXEDMAP 0x01 - /** no environment directory */ -#define MDB_NOSUBDIR 0x4000 - /** don't fsync after commit */ -#define MDB_NOSYNC 0x10000 - /** read only */ -#define MDB_RDONLY 0x20000 - /** don't fsync metapage after commit */ -#define MDB_NOMETASYNC 0x40000 - /** use writable mmap */ -#define MDB_WRITEMAP 0x80000 - /** use asynchronous msync when #MDB_WRITEMAP is used */ -#define MDB_MAPASYNC 0x100000 - /** tie reader locktable slots to #MDB_txn objects instead of to threads */ -#define MDB_NOTLS 0x200000 - /** don't do any locking, caller must manage their own locks */ -#define MDB_NOLOCK 0x400000 - /** don't do readahead (no effect on Windows) */ -#define MDB_NORDAHEAD 0x800000 - /** don't initialize malloc'd memory before writing to datafile */ -#define MDB_NOMEMINIT 0x1000000 -/** @} */ - -/** @defgroup mdb_dbi_open Database Flags - * @{ - */ - /** use reverse string keys */ -#define MDB_REVERSEKEY 0x02 - /** use sorted duplicates */ -#define MDB_DUPSORT 0x04 - /** numeric keys in native byte order: either unsigned int or size_t. - * The keys must all be of the same size. */ -#define MDB_INTEGERKEY 0x08 - /** with #MDB_DUPSORT, sorted dup items have fixed size */ -#define MDB_DUPFIXED 0x10 - /** with #MDB_DUPSORT, dups are #MDB_INTEGERKEY-style integers */ -#define MDB_INTEGERDUP 0x20 - /** with #MDB_DUPSORT, use reverse string dups */ -#define MDB_REVERSEDUP 0x40 - /** create DB if not already existing */ -#define MDB_CREATE 0x40000 -/** @} */ - -/** @defgroup mdb_put Write Flags - * @{ - */ -/** For put: Don't write if the key already exists. */ -#define MDB_NOOVERWRITE 0x10 -/** Only for #MDB_DUPSORT
    - * For put: don't write if the key and data pair already exist.
    - * For mdb_cursor_del: remove all duplicate data items. - */ -#define MDB_NODUPDATA 0x20 -/** For mdb_cursor_put: overwrite the current key/data pair */ -#define MDB_CURRENT 0x40 -/** For put: Just reserve space for data, don't copy it. Return a - * pointer to the reserved space. - */ -#define MDB_RESERVE 0x10000 -/** Data is being appended, don't split full pages. */ -#define MDB_APPEND 0x20000 -/** Duplicate data is being appended, don't split full pages. */ -#define MDB_APPENDDUP 0x40000 -/** Store multiple data items in one call. Only for #MDB_DUPFIXED. */ -#define MDB_MULTIPLE 0x80000 -/* @} */ - -/** @defgroup mdb_copy Copy Flags - * @{ - */ -/** Compacting copy: Omit free space from copy, and renumber all - * pages sequentially. - */ -#define MDB_CP_COMPACT 0x01 -/* @} */ - -/** @brief Cursor Get operations. - * - * This is the set of all operations for retrieving data - * using a cursor. - */ -typedef enum MDB_cursor_op { - MDB_FIRST, /**< Position at first key/data item */ - MDB_FIRST_DUP, /**< Position at first data item of current key. - Only for #MDB_DUPSORT */ - MDB_GET_BOTH, /**< Position at key/data pair. Only for #MDB_DUPSORT */ - MDB_GET_BOTH_RANGE, /**< position at key, nearest data. Only for #MDB_DUPSORT */ - MDB_GET_CURRENT, /**< Return key/data at current cursor position */ - MDB_GET_MULTIPLE, /**< Return key and up to a page of duplicate data items - from current cursor position. Move cursor to prepare - for #MDB_NEXT_MULTIPLE. Only for #MDB_DUPFIXED */ - MDB_LAST, /**< Position at last key/data item */ - MDB_LAST_DUP, /**< Position at last data item of current key. - Only for #MDB_DUPSORT */ - MDB_NEXT, /**< Position at next data item */ - MDB_NEXT_DUP, /**< Position at next data item of current key. - Only for #MDB_DUPSORT */ - MDB_NEXT_MULTIPLE, /**< Return key and up to a page of duplicate data items - from next cursor position. Move cursor to prepare - for #MDB_NEXT_MULTIPLE. Only for #MDB_DUPFIXED */ - MDB_NEXT_NODUP, /**< Position at first data item of next key */ - MDB_PREV, /**< Position at previous data item */ - MDB_PREV_DUP, /**< Position at previous data item of current key. - Only for #MDB_DUPSORT */ - MDB_PREV_NODUP, /**< Position at last data item of previous key */ - MDB_SET, /**< Position at specified key */ - MDB_SET_KEY, /**< Position at specified key, return key + data */ - MDB_SET_RANGE /**< Position at first key greater than or equal to specified key. */ -} MDB_cursor_op; - -/** @defgroup errors Return Codes - * - * BerkeleyDB uses -30800 to -30999, we'll go under them - * @{ - */ - /** Successful result */ -#define MDB_SUCCESS 0 - /** key/data pair already exists */ -#define MDB_KEYEXIST (-30799) - /** key/data pair not found (EOF) */ -#define MDB_NOTFOUND (-30798) - /** Requested page not found - this usually indicates corruption */ -#define MDB_PAGE_NOTFOUND (-30797) - /** Located page was wrong type */ -#define MDB_CORRUPTED (-30796) - /** Update of meta page failed, probably I/O error */ -#define MDB_PANIC (-30795) - /** Environment version mismatch */ -#define MDB_VERSION_MISMATCH (-30794) - /** File is not a valid LMDB file */ -#define MDB_INVALID (-30793) - /** Environment mapsize reached */ -#define MDB_MAP_FULL (-30792) - /** Environment maxdbs reached */ -#define MDB_DBS_FULL (-30791) - /** Environment maxreaders reached */ -#define MDB_READERS_FULL (-30790) - /** Too many TLS keys in use - Windows only */ -#define MDB_TLS_FULL (-30789) - /** Txn has too many dirty pages */ -#define MDB_TXN_FULL (-30788) - /** Cursor stack too deep - internal error */ -#define MDB_CURSOR_FULL (-30787) - /** Page has not enough space - internal error */ -#define MDB_PAGE_FULL (-30786) - /** Database contents grew beyond environment mapsize */ -#define MDB_MAP_RESIZED (-30785) - /** MDB_INCOMPATIBLE: Operation and DB incompatible, or DB flags changed */ -#define MDB_INCOMPATIBLE (-30784) - /** Invalid reuse of reader locktable slot */ -#define MDB_BAD_RSLOT (-30783) - /** Transaction cannot recover - it must be aborted */ -#define MDB_BAD_TXN (-30782) - /** Unsupported size of key/DB name/data, or wrong DUPFIXED size */ -#define MDB_BAD_VALSIZE (-30781) - /** The specified DBI was changed unexpectedly */ -#define MDB_BAD_DBI (-30780) - /** The last defined error code */ -#define MDB_LAST_ERRCODE MDB_BAD_DBI -/** @} */ - -/** @brief Statistics for a database in the environment */ -typedef struct MDB_stat { - unsigned int ms_psize; /**< Size of a database page. - This is currently the same for all databases. */ - unsigned int ms_depth; /**< Depth (height) of the B-tree */ - size_t ms_branch_pages; /**< Number of internal (non-leaf) pages */ - size_t ms_leaf_pages; /**< Number of leaf pages */ - size_t ms_overflow_pages; /**< Number of overflow pages */ - size_t ms_entries; /**< Number of data items */ -} MDB_stat; - -/** @brief Information about the environment */ -typedef struct MDB_envinfo { - void *me_mapaddr; /**< Address of map, if fixed */ - size_t me_mapsize; /**< Size of the data memory map */ - size_t me_last_pgno; /**< ID of the last used page */ - size_t me_last_txnid; /**< ID of the last committed transaction */ - unsigned int me_maxreaders; /**< max reader slots in the environment */ - unsigned int me_numreaders; /**< max reader slots used in the environment */ -} MDB_envinfo; - - /** @brief Return the LMDB library version information. - * - * @param[out] major if non-NULL, the library major version number is copied here - * @param[out] minor if non-NULL, the library minor version number is copied here - * @param[out] patch if non-NULL, the library patch version number is copied here - * @retval "version string" The library version as a string - */ -char *mdb_version(int *major, int *minor, int *patch); - - /** @brief Return a string describing a given error code. - * - * This function is a superset of the ANSI C X3.159-1989 (ANSI C) strerror(3) - * function. If the error code is greater than or equal to 0, then the string - * returned by the system function strerror(3) is returned. If the error code - * is less than 0, an error string corresponding to the LMDB library error is - * returned. See @ref errors for a list of LMDB-specific error codes. - * @param[in] err The error code - * @retval "error message" The description of the error - */ -char *mdb_strerror(int err); - - /** @brief Create an LMDB environment handle. - * - * This function allocates memory for a #MDB_env structure. To release - * the allocated memory and discard the handle, call #mdb_env_close(). - * Before the handle may be used, it must be opened using #mdb_env_open(). - * Various other options may also need to be set before opening the handle, - * e.g. #mdb_env_set_mapsize(), #mdb_env_set_maxreaders(), #mdb_env_set_maxdbs(), - * depending on usage requirements. - * @param[out] env The address where the new handle will be stored - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_env_create(MDB_env **env); - - /** @brief Open an environment handle. - * - * If this function fails, #mdb_env_close() must be called to discard the #MDB_env handle. - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] path The directory in which the database files reside. This - * directory must already exist and be writable. - * @param[in] flags Special options for this environment. This parameter - * must be set to 0 or by bitwise OR'ing together one or more of the - * values described here. - * Flags set by mdb_env_set_flags() are also used. - *
      - *
    • #MDB_FIXEDMAP - * use a fixed address for the mmap region. This flag must be specified - * when creating the environment, and is stored persistently in the environment. - * If successful, the memory map will always reside at the same virtual address - * and pointers used to reference data items in the database will be constant - * across multiple invocations. This option may not always work, depending on - * how the operating system has allocated memory to shared libraries and other uses. - * The feature is highly experimental. - *
    • #MDB_NOSUBDIR - * By default, LMDB creates its environment in a directory whose - * pathname is given in \b path, and creates its data and lock files - * under that directory. With this option, \b path is used as-is for - * the database main data file. The database lock file is the \b path - * with "-lock" appended. - *
    • #MDB_RDONLY - * Open the environment in read-only mode. No write operations will be - * allowed. LMDB will still modify the lock file - except on read-only - * filesystems, where LMDB does not use locks. - *
    • #MDB_WRITEMAP - * Use a writeable memory map unless MDB_RDONLY is set. This is faster - * and uses fewer mallocs, but loses protection from application bugs - * like wild pointer writes and other bad updates into the database. - * Incompatible with nested transactions. - * Do not mix processes with and without MDB_WRITEMAP on the same - * environment. This can defeat durability (#mdb_env_sync etc). - *
    • #MDB_NOMETASYNC - * Flush system buffers to disk only once per transaction, omit the - * metadata flush. Defer that until the system flushes files to disk, - * or next non-MDB_RDONLY commit or #mdb_env_sync(). This optimization - * maintains database integrity, but a system crash may undo the last - * committed transaction. I.e. it preserves the ACI (atomicity, - * consistency, isolation) but not D (durability) database property. - * This flag may be changed at any time using #mdb_env_set_flags(). - *
    • #MDB_NOSYNC - * Don't flush system buffers to disk when committing a transaction. - * This optimization means a system crash can corrupt the database or - * lose the last transactions if buffers are not yet flushed to disk. - * The risk is governed by how often the system flushes dirty buffers - * to disk and how often #mdb_env_sync() is called. However, if the - * filesystem preserves write order and the #MDB_WRITEMAP flag is not - * used, transactions exhibit ACI (atomicity, consistency, isolation) - * properties and only lose D (durability). I.e. database integrity - * is maintained, but a system crash may undo the final transactions. - * Note that (#MDB_NOSYNC | #MDB_WRITEMAP) leaves the system with no - * hint for when to write transactions to disk, unless #mdb_env_sync() - * is called. (#MDB_MAPASYNC | #MDB_WRITEMAP) may be preferable. - * This flag may be changed at any time using #mdb_env_set_flags(). - *
    • #MDB_MAPASYNC - * When using #MDB_WRITEMAP, use asynchronous flushes to disk. - * As with #MDB_NOSYNC, a system crash can then corrupt the - * database or lose the last transactions. Calling #mdb_env_sync() - * ensures on-disk database integrity until next commit. - * This flag may be changed at any time using #mdb_env_set_flags(). - *
    • #MDB_NOTLS - * Don't use Thread-Local Storage. Tie reader locktable slots to - * #MDB_txn objects instead of to threads. I.e. #mdb_txn_reset() keeps - * the slot reseved for the #MDB_txn object. A thread may use parallel - * read-only transactions. A read-only transaction may span threads if - * the user synchronizes its use. Applications that multiplex many - * user threads over individual OS threads need this option. Such an - * application must also serialize the write transactions in an OS - * thread, since LMDB's write locking is unaware of the user threads. - *
    • #MDB_NOLOCK - * Don't do any locking. If concurrent access is anticipated, the - * caller must manage all concurrency itself. For proper operation - * the caller must enforce single-writer semantics, and must ensure - * that no readers are using old transactions while a writer is - * active. The simplest approach is to use an exclusive lock so that - * no readers may be active at all when a writer begins. - *
    • #MDB_NORDAHEAD - * Turn off readahead. Most operating systems perform readahead on - * read requests by default. This option turns it off if the OS - * supports it. Turning it off may help random read performance - * when the DB is larger than RAM and system RAM is full. - * The option is not implemented on Windows. - *
    • #MDB_NOMEMINIT - * Don't initialize malloc'd memory before writing to unused spaces - * in the data file. By default, memory for pages written to the data - * file is obtained using malloc. While these pages may be reused in - * subsequent transactions, freshly malloc'd pages will be initialized - * to zeroes before use. This avoids persisting leftover data from other - * code (that used the heap and subsequently freed the memory) into the - * data file. Note that many other system libraries may allocate - * and free memory from the heap for arbitrary uses. E.g., stdio may - * use the heap for file I/O buffers. This initialization step has a - * modest performance cost so some applications may want to disable - * it using this flag. This option can be a problem for applications - * which handle sensitive data like passwords, and it makes memory - * checkers like Valgrind noisy. This flag is not needed with #MDB_WRITEMAP, - * which writes directly to the mmap instead of using malloc for pages. The - * initialization is also skipped if #MDB_RESERVE is used; the - * caller is expected to overwrite all of the memory that was - * reserved in that case. - * This flag may be changed at any time using #mdb_env_set_flags(). - *
    - * @param[in] mode The UNIX permissions to set on created files and semaphores. - * This parameter is ignored on Windows. - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_VERSION_MISMATCH - the version of the LMDB library doesn't match the - * version that created the database environment. - *
    • #MDB_INVALID - the environment file headers are corrupted. - *
    • ENOENT - the directory specified by the path parameter doesn't exist. - *
    • EACCES - the user didn't have permission to access the environment files. - *
    • EAGAIN - the environment was locked by another process. - *
    - */ -int mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode); - - /** @brief Copy an LMDB environment to the specified path. - * - * This function may be used to make a backup of an existing environment. - * No lockfile is created, since it gets recreated at need. - * @note This call can trigger significant file size growth if run in - * parallel with write transactions, because it employs a read-only - * transaction. See long-lived transactions under @ref caveats_sec. - * @param[in] env An environment handle returned by #mdb_env_create(). It - * must have already been opened successfully. - * @param[in] path The directory in which the copy will reside. This - * directory must already exist and be writable but must otherwise be - * empty. - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_env_copy(MDB_env *env, const char *path); - - /** @brief Copy an LMDB environment to the specified file descriptor. - * - * This function may be used to make a backup of an existing environment. - * No lockfile is created, since it gets recreated at need. - * @note This call can trigger significant file size growth if run in - * parallel with write transactions, because it employs a read-only - * transaction. See long-lived transactions under @ref caveats_sec. - * @param[in] env An environment handle returned by #mdb_env_create(). It - * must have already been opened successfully. - * @param[in] fd The filedescriptor to write the copy to. It must - * have already been opened for Write access. - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_env_copyfd(MDB_env *env, mdb_filehandle_t fd); - - /** @brief Copy an LMDB environment to the specified path, with options. - * - * This function may be used to make a backup of an existing environment. - * No lockfile is created, since it gets recreated at need. - * @note This call can trigger significant file size growth if run in - * parallel with write transactions, because it employs a read-only - * transaction. See long-lived transactions under @ref caveats_sec. - * @param[in] env An environment handle returned by #mdb_env_create(). It - * must have already been opened successfully. - * @param[in] path The directory in which the copy will reside. This - * directory must already exist and be writable but must otherwise be - * empty. - * @param[in] flags Special options for this operation. This parameter - * must be set to 0 or by bitwise OR'ing together one or more of the - * values described here. - *
      - *
    • #MDB_CP_COMPACT - Perform compaction while copying: omit free - * pages and sequentially renumber all pages in output. This option - * consumes more CPU and runs more slowly than the default. - *
    - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags); - - /** @brief Copy an LMDB environment to the specified file descriptor, - * with options. - * - * This function may be used to make a backup of an existing environment. - * No lockfile is created, since it gets recreated at need. See - * #mdb_env_copy2() for further details. - * @note This call can trigger significant file size growth if run in - * parallel with write transactions, because it employs a read-only - * transaction. See long-lived transactions under @ref caveats_sec. - * @param[in] env An environment handle returned by #mdb_env_create(). It - * must have already been opened successfully. - * @param[in] fd The filedescriptor to write the copy to. It must - * have already been opened for Write access. - * @param[in] flags Special options for this operation. - * See #mdb_env_copy2() for options. - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_env_copyfd2(MDB_env *env, mdb_filehandle_t fd, unsigned int flags); - - /** @brief Return statistics about the LMDB environment. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[out] stat The address of an #MDB_stat structure - * where the statistics will be copied - */ -int mdb_env_stat(MDB_env *env, MDB_stat *stat); - - /** @brief Return information about the LMDB environment. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[out] stat The address of an #MDB_envinfo structure - * where the information will be copied - */ -int mdb_env_info(MDB_env *env, MDB_envinfo *stat); - - /** @brief Flush the data buffers to disk. - * - * Data is always written to disk when #mdb_txn_commit() is called, - * but the operating system may keep it buffered. LMDB always flushes - * the OS buffers upon commit as well, unless the environment was - * opened with #MDB_NOSYNC or in part #MDB_NOMETASYNC. This call is - * not valid if the environment was opened with #MDB_RDONLY. - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] force If non-zero, force a synchronous flush. Otherwise - * if the environment has the #MDB_NOSYNC flag set the flushes - * will be omitted, and with #MDB_MAPASYNC they will be asynchronous. - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EACCES - the environment is read-only. - *
    • EINVAL - an invalid parameter was specified. - *
    • EIO - an error occurred during synchronization. - *
    - */ -int mdb_env_sync(MDB_env *env, int force); - - /** @brief Close the environment and release the memory map. - * - * Only a single thread may call this function. All transactions, databases, - * and cursors must already be closed before calling this function. Attempts to - * use any such handles after calling this function will cause a SIGSEGV. - * The environment handle will be freed and must not be used again after this call. - * @param[in] env An environment handle returned by #mdb_env_create() - */ -void mdb_env_close(MDB_env *env); - - /** @brief Set environment flags. - * - * This may be used to set some flags in addition to those from - * #mdb_env_open(), or to unset these flags. If several threads - * change the flags at the same time, the result is undefined. - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] flags The flags to change, bitwise OR'ed together - * @param[in] onoff A non-zero value sets the flags, zero clears them. - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_env_set_flags(MDB_env *env, unsigned int flags, int onoff); - - /** @brief Get environment flags. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[out] flags The address of an integer to store the flags - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_env_get_flags(MDB_env *env, unsigned int *flags); - - /** @brief Return the path that was used in #mdb_env_open(). - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[out] path Address of a string pointer to contain the path. This - * is the actual string in the environment, not a copy. It should not be - * altered in any way. - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_env_get_path(MDB_env *env, const char **path); - - /** @brief Return the filedescriptor for the given environment. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[out] fd Address of a mdb_filehandle_t to contain the descriptor. - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *fd); - - /** @brief Set the size of the memory map to use for this environment. - * - * The size should be a multiple of the OS page size. The default is - * 10485760 bytes. The size of the memory map is also the maximum size - * of the database. The value should be chosen as large as possible, - * to accommodate future growth of the database. - * This function should be called after #mdb_env_create() and before #mdb_env_open(). - * It may be called at later times if no transactions are active in - * this process. Note that the library does not check for this condition, - * the caller must ensure it explicitly. - * - * The new size takes effect immediately for the current process but - * will not be persisted to any others until a write transaction has been - * committed by the current process. Also, only mapsize increases are - * persisted into the environment. - * - * If the mapsize is increased by another process, and data has grown - * beyond the range of the current mapsize, #mdb_txn_begin() will - * return #MDB_MAP_RESIZED. This function may be called with a size - * of zero to adopt the new size. - * - * Any attempt to set a size smaller than the space already consumed - * by the environment will be silently changed to the current size of the used space. - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] size The size in bytes - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified, or the environment has - * an active write transaction. - *
    - */ -int mdb_env_set_mapsize(MDB_env *env, size_t size); - - /** @brief Set the maximum number of threads/reader slots for the environment. - * - * This defines the number of slots in the lock table that is used to track readers in the - * the environment. The default is 126. - * Starting a read-only transaction normally ties a lock table slot to the - * current thread until the environment closes or the thread exits. If - * MDB_NOTLS is in use, #mdb_txn_begin() instead ties the slot to the - * MDB_txn object until it or the #MDB_env object is destroyed. - * This function may only be called after #mdb_env_create() and before #mdb_env_open(). - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] readers The maximum number of reader lock table slots - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified, or the environment is already open. - *
    - */ -int mdb_env_set_maxreaders(MDB_env *env, unsigned int readers); - - /** @brief Get the maximum number of threads/reader slots for the environment. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[out] readers Address of an integer to store the number of readers - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers); - - /** @brief Set the maximum number of named databases for the environment. - * - * This function is only needed if multiple databases will be used in the - * environment. Simpler applications that use the environment as a single - * unnamed database can ignore this option. - * This function may only be called after #mdb_env_create() and before #mdb_env_open(). - * - * Currently a moderate number of slots are cheap but a huge number gets - * expensive: 7-120 words per transaction, and every #mdb_dbi_open() - * does a linear search of the opened slots. - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] dbs The maximum number of databases - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified, or the environment is already open. - *
    - */ -int mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs); - - /** @brief Get the maximum size of keys and #MDB_DUPSORT data we can write. - * - * Depends on the compile-time constant #MDB_MAXKEYSIZE. Default 511. - * See @ref MDB_val. - * @param[in] env An environment handle returned by #mdb_env_create() - * @return The maximum size of a key we can write - */ -int mdb_env_get_maxkeysize(MDB_env *env); - - /** @brief Set application information associated with the #MDB_env. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] ctx An arbitrary pointer for whatever the application needs. - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_env_set_userctx(MDB_env *env, void *ctx); - - /** @brief Get the application information associated with the #MDB_env. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @return The pointer set by #mdb_env_set_userctx(). - */ -void *mdb_env_get_userctx(MDB_env *env); - - /** @brief A callback function for most LMDB assert() failures, - * called before printing the message and aborting. - * - * @param[in] env An environment handle returned by #mdb_env_create(). - * @param[in] msg The assertion message, not including newline. - */ -typedef void MDB_assert_func(MDB_env *env, const char *msg); - - /** Set or reset the assert() callback of the environment. - * Disabled if liblmdb is buillt with NDEBUG. - * @note This hack should become obsolete as lmdb's error handling matures. - * @param[in] env An environment handle returned by #mdb_env_create(). - * @param[in] func An #MDB_assert_func function, or 0. - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_env_set_assert(MDB_env *env, MDB_assert_func *func); - - /** @brief Create a transaction for use with the environment. - * - * The transaction handle may be discarded using #mdb_txn_abort() or #mdb_txn_commit(). - * @note A transaction and its cursors must only be used by a single - * thread, and a thread may only have a single transaction at a time. - * If #MDB_NOTLS is in use, this does not apply to read-only transactions. - * @note Cursors may not span transactions. - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] parent If this parameter is non-NULL, the new transaction - * will be a nested transaction, with the transaction indicated by \b parent - * as its parent. Transactions may be nested to any level. A parent - * transaction and its cursors may not issue any other operations than - * mdb_txn_commit and mdb_txn_abort while it has active child transactions. - * @param[in] flags Special options for this transaction. This parameter - * must be set to 0 or by bitwise OR'ing together one or more of the - * values described here. - *
      - *
    • #MDB_RDONLY - * This transaction will not perform any write operations. - *
    - * @param[out] txn Address where the new #MDB_txn handle will be stored - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_PANIC - a fatal error occurred earlier and the environment - * must be shut down. - *
    • #MDB_MAP_RESIZED - another process wrote data beyond this MDB_env's - * mapsize and this environment's map must be resized as well. - * See #mdb_env_set_mapsize(). - *
    • #MDB_READERS_FULL - a read-only transaction was requested and - * the reader lock table is full. See #mdb_env_set_maxreaders(). - *
    • ENOMEM - out of memory. - *
    - */ -int mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **txn); - - /** @brief Returns the transaction's #MDB_env - * - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - */ -MDB_env *mdb_txn_env(MDB_txn *txn); - - /** @brief Commit all the operations of a transaction into the database. - * - * The transaction handle is freed. It and its cursors must not be used - * again after this call, except with #mdb_cursor_renew(). - * @note Earlier documentation incorrectly said all cursors would be freed. - * Only write-transactions free cursors. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    • ENOSPC - no more disk space. - *
    • EIO - a low-level I/O error occurred while writing. - *
    • ENOMEM - out of memory. - *
    - */ -int mdb_txn_commit(MDB_txn *txn); - - /** @brief Abandon all the operations of the transaction instead of saving them. - * - * The transaction handle is freed. It and its cursors must not be used - * again after this call, except with #mdb_cursor_renew(). - * @note Earlier documentation incorrectly said all cursors would be freed. - * Only write-transactions free cursors. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - */ -void mdb_txn_abort(MDB_txn *txn); - - /** @brief Reset a read-only transaction. - * - * Abort the transaction like #mdb_txn_abort(), but keep the transaction - * handle. #mdb_txn_renew() may reuse the handle. This saves allocation - * overhead if the process will start a new read-only transaction soon, - * and also locking overhead if #MDB_NOTLS is in use. The reader table - * lock is released, but the table slot stays tied to its thread or - * #MDB_txn. Use mdb_txn_abort() to discard a reset handle, and to free - * its lock table slot if MDB_NOTLS is in use. - * Cursors opened within the transaction must not be used - * again after this call, except with #mdb_cursor_renew(). - * Reader locks generally don't interfere with writers, but they keep old - * versions of database pages allocated. Thus they prevent the old pages - * from being reused when writers commit new data, and so under heavy load - * the database size may grow much more rapidly than otherwise. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - */ -void mdb_txn_reset(MDB_txn *txn); - - /** @brief Renew a read-only transaction. - * - * This acquires a new reader lock for a transaction handle that had been - * released by #mdb_txn_reset(). It must be called before a reset transaction - * may be used again. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_PANIC - a fatal error occurred earlier and the environment - * must be shut down. - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_txn_renew(MDB_txn *txn); - -/** Compat with version <= 0.9.4, avoid clash with libmdb from MDB Tools project */ -#define mdb_open(txn,name,flags,dbi) mdb_dbi_open(txn,name,flags,dbi) -/** Compat with version <= 0.9.4, avoid clash with libmdb from MDB Tools project */ -#define mdb_close(env,dbi) mdb_dbi_close(env,dbi) - - /** @brief Open a database in the environment. - * - * A database handle denotes the name and parameters of a database, - * independently of whether such a database exists. - * The database handle may be discarded by calling #mdb_dbi_close(). - * The old database handle is returned if the database was already open. - * The handle may only be closed once. - * - * The database handle will be private to the current transaction until - * the transaction is successfully committed. If the transaction is - * aborted the handle will be closed automatically. - * After a successful commit the handle will reside in the shared - * environment, and may be used by other transactions. - * - * This function must not be called from multiple concurrent - * transactions in the same process. A transaction that uses - * this function must finish (either commit or abort) before - * any other transaction in the process may use this function. - * - * To use named databases (with name != NULL), #mdb_env_set_maxdbs() - * must be called before opening the environment. Database names - * are kept as keys in the unnamed database. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] name The name of the database to open. If only a single - * database is needed in the environment, this value may be NULL. - * @param[in] flags Special options for this database. This parameter - * must be set to 0 or by bitwise OR'ing together one or more of the - * values described here. - *
      - *
    • #MDB_REVERSEKEY - * Keys are strings to be compared in reverse order, from the end - * of the strings to the beginning. By default, Keys are treated as strings and - * compared from beginning to end. - *
    • #MDB_DUPSORT - * Duplicate keys may be used in the database. (Or, from another perspective, - * keys may have multiple data items, stored in sorted order.) By default - * keys must be unique and may have only a single data item. - *
    • #MDB_INTEGERKEY - * Keys are binary integers in native byte order, either unsigned int - * or size_t, and will be sorted as such. - * The keys must all be of the same size. - *
    • #MDB_DUPFIXED - * This flag may only be used in combination with #MDB_DUPSORT. This option - * tells the library that the data items for this database are all the same - * size, which allows further optimizations in storage and retrieval. When - * all data items are the same size, the #MDB_GET_MULTIPLE and #MDB_NEXT_MULTIPLE - * cursor operations may be used to retrieve multiple items at once. - *
    • #MDB_INTEGERDUP - * This option specifies that duplicate data items are binary integers, - * similar to #MDB_INTEGERKEY keys. - *
    • #MDB_REVERSEDUP - * This option specifies that duplicate data items should be compared as - * strings in reverse order. - *
    • #MDB_CREATE - * Create the named database if it doesn't exist. This option is not - * allowed in a read-only transaction or a read-only environment. - *
    - * @param[out] dbi Address where the new #MDB_dbi handle will be stored - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_NOTFOUND - the specified database doesn't exist in the environment - * and #MDB_CREATE was not specified. - *
    • #MDB_DBS_FULL - too many databases have been opened. See #mdb_env_set_maxdbs(). - *
    - */ -int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi); - - /** @brief Retrieve statistics for a database. - * - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[out] stat The address of an #MDB_stat structure - * where the statistics will be copied - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat); - - /** @brief Retrieve the DB flags for a database handle. - * - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[out] flags Address where the flags will be returned. - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_dbi_flags(MDB_txn *txn, MDB_dbi dbi, unsigned int *flags); - - /** @brief Close a database handle. Normally unnecessary. Use with care: - * - * This call is not mutex protected. Handles should only be closed by - * a single thread, and only if no other threads are going to reference - * the database handle or one of its cursors any further. Do not close - * a handle if an existing transaction has modified its database. - * Doing so can cause misbehavior from database corruption to errors - * like MDB_BAD_VALSIZE (since the DB name is gone). - * - * Closing a database handle is not necessary, but lets #mdb_dbi_open() - * reuse the handle value. Usually it's better to set a bigger - * #mdb_env_set_maxdbs(), unless that value would be large. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - */ -void mdb_dbi_close(MDB_env *env, MDB_dbi dbi); - - /** @brief Empty or delete+close a database. - * - * See #mdb_dbi_close() for restrictions about closing the DB handle. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] del 0 to empty the DB, 1 to delete it from the - * environment and close the DB handle. - * @return A non-zero error value on failure and 0 on success. - */ -int mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del); - - /** @brief Set a custom key comparison function for a database. - * - * The comparison function is called whenever it is necessary to compare a - * key specified by the application with a key currently stored in the database. - * If no comparison function is specified, and no special key flags were specified - * with #mdb_dbi_open(), the keys are compared lexically, with shorter keys collating - * before longer keys. - * @warning This function must be called before any data access functions are used, - * otherwise data corruption may occur. The same comparison function must be used by every - * program accessing the database, every time the database is used. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] cmp A #MDB_cmp_func function - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp); - - /** @brief Set a custom data comparison function for a #MDB_DUPSORT database. - * - * This comparison function is called whenever it is necessary to compare a data - * item specified by the application with a data item currently stored in the database. - * This function only takes effect if the database was opened with the #MDB_DUPSORT - * flag. - * If no comparison function is specified, and no special key flags were specified - * with #mdb_dbi_open(), the data items are compared lexically, with shorter items collating - * before longer items. - * @warning This function must be called before any data access functions are used, - * otherwise data corruption may occur. The same comparison function must be used by every - * program accessing the database, every time the database is used. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] cmp A #MDB_cmp_func function - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp); - - /** @brief Set a relocation function for a #MDB_FIXEDMAP database. - * - * @todo The relocation function is called whenever it is necessary to move the data - * of an item to a different position in the database (e.g. through tree - * balancing operations, shifts as a result of adds or deletes, etc.). It is - * intended to allow address/position-dependent data items to be stored in - * a database in an environment opened with the #MDB_FIXEDMAP option. - * Currently the relocation feature is unimplemented and setting - * this function has no effect. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] rel A #MDB_rel_func function - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel); - - /** @brief Set a context pointer for a #MDB_FIXEDMAP database's relocation function. - * - * See #mdb_set_relfunc and #MDB_rel_func for more details. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] ctx An arbitrary pointer for whatever the application needs. - * It will be passed to the callback function set by #mdb_set_relfunc - * as its \b relctx parameter whenever the callback is invoked. - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx); - - /** @brief Get items from a database. - * - * This function retrieves key/data pairs from the database. The address - * and length of the data associated with the specified \b key are returned - * in the structure to which \b data refers. - * If the database supports duplicate keys (#MDB_DUPSORT) then the - * first data item for the key will be returned. Retrieval of other - * items requires the use of #mdb_cursor_get(). - * - * @note The memory pointed to by the returned values is owned by the - * database. The caller need not dispose of the memory, and may not - * modify it in any way. For values returned in a read-only transaction - * any modification attempts will cause a SIGSEGV. - * @note Values returned from the database are valid only until a - * subsequent update operation, or the end of the transaction. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] key The key to search for in the database - * @param[out] data The data corresponding to the key - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_NOTFOUND - the key was not in the database. - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data); - - /** @brief Store items into a database. - * - * This function stores key/data pairs in the database. The default behavior - * is to enter the new key/data pair, replacing any previously existing key - * if duplicates are disallowed, or adding a duplicate data item if - * duplicates are allowed (#MDB_DUPSORT). - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] key The key to store in the database - * @param[in,out] data The data to store - * @param[in] flags Special options for this operation. This parameter - * must be set to 0 or by bitwise OR'ing together one or more of the - * values described here. - *
      - *
    • #MDB_NODUPDATA - enter the new key/data pair only if it does not - * already appear in the database. This flag may only be specified - * if the database was opened with #MDB_DUPSORT. The function will - * return #MDB_KEYEXIST if the key/data pair already appears in the - * database. - *
    • #MDB_NOOVERWRITE - enter the new key/data pair only if the key - * does not already appear in the database. The function will return - * #MDB_KEYEXIST if the key already appears in the database, even if - * the database supports duplicates (#MDB_DUPSORT). The \b data - * parameter will be set to point to the existing item. - *
    • #MDB_RESERVE - reserve space for data of the given size, but - * don't copy the given data. Instead, return a pointer to the - * reserved space, which the caller can fill in later - before - * the next update operation or the transaction ends. This saves - * an extra memcpy if the data is being generated later. - * LMDB does nothing else with this memory, the caller is expected - * to modify all of the space requested. - *
    • #MDB_APPEND - append the given key/data pair to the end of the - * database. This option allows fast bulk loading when keys are - * already known to be in the correct order. Loading unsorted keys - * with this flag will cause a #MDB_KEYEXIST error. - *
    • #MDB_APPENDDUP - as above, but for sorted dup data. - *
    - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_MAP_FULL - the database is full, see #mdb_env_set_mapsize(). - *
    • #MDB_TXN_FULL - the transaction has too many dirty pages. - *
    • EACCES - an attempt was made to write in a read-only transaction. - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_put(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data, - unsigned int flags); - - /** @brief Delete items from a database. - * - * This function removes key/data pairs from the database. - * If the database does not support sorted duplicate data items - * (#MDB_DUPSORT) the data parameter is ignored. - * If the database supports sorted duplicates and the data parameter - * is NULL, all of the duplicate data items for the key will be - * deleted. Otherwise, if the data parameter is non-NULL - * only the matching data item will be deleted. - * This function will return #MDB_NOTFOUND if the specified key/data - * pair is not in the database. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] key The key to delete from the database - * @param[in] data The data to delete - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EACCES - an attempt was made to write in a read-only transaction. - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data); - - /** @brief Create a cursor handle. - * - * A cursor is associated with a specific transaction and database. - * A cursor cannot be used when its database handle is closed. Nor - * when its transaction has ended, except with #mdb_cursor_renew(). - * It can be discarded with #mdb_cursor_close(). - * A cursor in a write-transaction can be closed before its transaction - * ends, and will otherwise be closed when its transaction ends. - * A cursor in a read-only transaction must be closed explicitly, before - * or after its transaction ends. It can be reused with - * #mdb_cursor_renew() before finally closing it. - * @note Earlier documentation said that cursors in every transaction - * were closed when the transaction committed or aborted. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[out] cursor Address where the new #MDB_cursor handle will be stored - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **cursor); - - /** @brief Close a cursor handle. - * - * The cursor handle will be freed and must not be used again after this call. - * Its transaction must still be live if it is a write-transaction. - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - */ -void mdb_cursor_close(MDB_cursor *cursor); - - /** @brief Renew a cursor handle. - * - * A cursor is associated with a specific transaction and database. - * Cursors that are only used in read-only - * transactions may be re-used, to avoid unnecessary malloc/free overhead. - * The cursor may be associated with a new read-only transaction, and - * referencing the same database handle as it was created with. - * This may be done whether the previous transaction is live or dead. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_cursor_renew(MDB_txn *txn, MDB_cursor *cursor); - - /** @brief Return the cursor's transaction handle. - * - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - */ -MDB_txn *mdb_cursor_txn(MDB_cursor *cursor); - - /** @brief Return the cursor's database handle. - * - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - */ -MDB_dbi mdb_cursor_dbi(MDB_cursor *cursor); - - /** @brief Retrieve by cursor. - * - * This function retrieves key/data pairs from the database. The address and length - * of the key are returned in the object to which \b key refers (except for the - * case of the #MDB_SET option, in which the \b key object is unchanged), and - * the address and length of the data are returned in the object to which \b data - * refers. - * See #mdb_get() for restrictions on using the output values. - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - * @param[in,out] key The key for a retrieved item - * @param[in,out] data The data of a retrieved item - * @param[in] op A cursor operation #MDB_cursor_op - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_NOTFOUND - no matching key found. - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data, - MDB_cursor_op op); - - /** @brief Store by cursor. - * - * This function stores key/data pairs into the database. - * The cursor is positioned at the new item, or on failure usually near it. - * @note Earlier documentation incorrectly said errors would leave the - * state of the cursor unchanged. - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - * @param[in] key The key operated on. - * @param[in] data The data operated on. - * @param[in] flags Options for this operation. This parameter - * must be set to 0 or one of the values described here. - *
      - *
    • #MDB_CURRENT - replace the item at the current cursor position. - * The \b key parameter must still be provided, and must match it. - * If using sorted duplicates (#MDB_DUPSORT) the data item must still - * sort into the same place. This is intended to be used when the - * new data is the same size as the old. Otherwise it will simply - * perform a delete of the old record followed by an insert. - *
    • #MDB_NODUPDATA - enter the new key/data pair only if it does not - * already appear in the database. This flag may only be specified - * if the database was opened with #MDB_DUPSORT. The function will - * return #MDB_KEYEXIST if the key/data pair already appears in the - * database. - *
    • #MDB_NOOVERWRITE - enter the new key/data pair only if the key - * does not already appear in the database. The function will return - * #MDB_KEYEXIST if the key already appears in the database, even if - * the database supports duplicates (#MDB_DUPSORT). - *
    • #MDB_RESERVE - reserve space for data of the given size, but - * don't copy the given data. Instead, return a pointer to the - * reserved space, which the caller can fill in later. This saves - * an extra memcpy if the data is being generated later. - *
    • #MDB_APPEND - append the given key/data pair to the end of the - * database. No key comparisons are performed. This option allows - * fast bulk loading when keys are already known to be in the - * correct order. Loading unsorted keys with this flag will cause - * data corruption. - *
    • #MDB_APPENDDUP - as above, but for sorted dup data. - *
    • #MDB_MULTIPLE - store multiple contiguous data elements in a - * single request. This flag may only be specified if the database - * was opened with #MDB_DUPFIXED. The \b data argument must be an - * array of two MDB_vals. The mv_size of the first MDB_val must be - * the size of a single data element. The mv_data of the first MDB_val - * must point to the beginning of the array of contiguous data elements. - * The mv_size of the second MDB_val must be the count of the number - * of data elements to store. On return this field will be set to - * the count of the number of elements actually written. The mv_data - * of the second MDB_val is unused. - *
    - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • #MDB_MAP_FULL - the database is full, see #mdb_env_set_mapsize(). - *
    • #MDB_TXN_FULL - the transaction has too many dirty pages. - *
    • EACCES - an attempt was made to write in a read-only transaction. - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_cursor_put(MDB_cursor *cursor, MDB_val *key, MDB_val *data, - unsigned int flags); - - /** @brief Delete current key/data pair - * - * This function deletes the key/data pair to which the cursor refers. - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - * @param[in] flags Options for this operation. This parameter - * must be set to 0 or one of the values described here. - *
      - *
    • #MDB_NODUPDATA - delete all of the data items for the current key. - * This flag may only be specified if the database was opened with #MDB_DUPSORT. - *
    - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EACCES - an attempt was made to write in a read-only transaction. - *
    • EINVAL - an invalid parameter was specified. - *
    - */ -int mdb_cursor_del(MDB_cursor *cursor, unsigned int flags); - - /** @brief Return count of duplicates for current key. - * - * This call is only valid on databases that support sorted duplicate - * data items #MDB_DUPSORT. - * @param[in] cursor A cursor handle returned by #mdb_cursor_open() - * @param[out] countp Address where the count will be stored - * @return A non-zero error value on failure and 0 on success. Some possible - * errors are: - *
      - *
    • EINVAL - cursor is not initialized, or an invalid parameter was specified. - *
    - */ -int mdb_cursor_count(MDB_cursor *cursor, size_t *countp); - - /** @brief Compare two data items according to a particular database. - * - * This returns a comparison as if the two data items were keys in the - * specified database. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] a The first item to compare - * @param[in] b The second item to compare - * @return < 0 if a < b, 0 if a == b, > 0 if a > b - */ -int mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b); - - /** @brief Compare two data items according to a particular database. - * - * This returns a comparison as if the two items were data items of - * the specified database. The database must have the #MDB_DUPSORT flag. - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - * @param[in] a The first item to compare - * @param[in] b The second item to compare - * @return < 0 if a < b, 0 if a == b, > 0 if a > b - */ -int mdb_dcmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b); - - /** @brief A callback function used to print a message from the library. - * - * @param[in] msg The string to be printed. - * @param[in] ctx An arbitrary context pointer for the callback. - * @return < 0 on failure, >= 0 on success. - */ -typedef int (MDB_msg_func)(const char *msg, void *ctx); - - /** @brief Dump the entries in the reader lock table. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[in] func A #MDB_msg_func function - * @param[in] ctx Anything the message function needs - * @return < 0 on failure, >= 0 on success. - */ -int mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx); - - /** @brief Check for stale entries in the reader lock table. - * - * @param[in] env An environment handle returned by #mdb_env_create() - * @param[out] dead Number of stale slots that were cleared - * @return 0 on success, non-zero on failure. - */ -int mdb_reader_check(MDB_env *env, int *dead); -/** @} */ - -#ifdef __cplusplus -} -#endif -/** @page tools LMDB Command Line Tools - The following describes the command line tools that are available for LMDB. - \li \ref mdb_copy_1 - \li \ref mdb_dump_1 - \li \ref mdb_load_1 - \li \ref mdb_stat_1 -*/ - -#endif /* _LMDB_H_ */ diff --git a/external/db_drivers/liblmdb64/mdb.c b/external/db_drivers/liblmdb64/mdb.c deleted file mode 100644 index 6bdf3151d..000000000 --- a/external/db_drivers/liblmdb64/mdb.c +++ /dev/null @@ -1,9555 +0,0 @@ -/** @file mdb.c - * @brief Lightning memory-mapped database library - * - * A Btree-based database management library modeled loosely on the - * BerkeleyDB API, but much simplified. - */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - * - * This code is derived from btree.c written by Martin Hedenfalk. - * - * Copyright (c) 2009, 2010 Martin Hedenfalk - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ -#ifndef _GNU_SOURCE -#define _GNU_SOURCE 1 -#endif -#ifdef _WIN32 -#include -#include -/** getpid() returns int; MinGW defines pid_t but MinGW64 typedefs it - * as int64 which is wrong. MSVC doesn't define it at all, so just - * don't use it. - */ -#define MDB_PID_T int -#define MDB_THR_T DWORD -#include -#include -#ifdef __GNUC__ -# include -#else -# define LITTLE_ENDIAN 1234 -# define BIG_ENDIAN 4321 -# define BYTE_ORDER LITTLE_ENDIAN -# ifndef SSIZE_MAX -# define SSIZE_MAX INT_MAX -# endif -#endif -#else -#include -#include -#define MDB_PID_T pid_t -#define MDB_THR_T pthread_t -#include -#include -#include -#ifdef HAVE_SYS_FILE_H -#include -#endif -#include -#endif - -#if defined(__mips) && defined(__linux) -/* MIPS has cache coherency issues, requires explicit cache control */ -#include -extern int cacheflush(char *addr, int nbytes, int cache); -#define CACHEFLUSH(addr, bytes, cache) cacheflush(addr, bytes, cache) -#else -#define CACHEFLUSH(addr, bytes, cache) -#endif - -#if defined(__linux) && !defined(MDB_FDATASYNC_WORKS) -/** fdatasync is broken on ext3/ext4fs on older kernels, see - * description in #mdb_env_open2 comments. You can safely - * define MDB_FDATASYNC_WORKS if this code will only be run - * on kernels 3.6 and newer. - */ -#define BROKEN_FDATASYNC -#endif - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#if defined(__sun) || defined(ANDROID) -/* Most platforms have posix_memalign, older may only have memalign */ -#define HAVE_MEMALIGN 1 -#include -#endif - -#if !(defined(BYTE_ORDER) || defined(__BYTE_ORDER)) -#include -#include /* defines BYTE_ORDER on HPUX and Solaris */ -#endif - -#if defined(__APPLE__) || defined (BSD) -# define MDB_USE_POSIX_SEM 1 -# define MDB_FDATASYNC fsync -#elif defined(ANDROID) -# define MDB_FDATASYNC fsync -#endif - -#ifndef _WIN32 -#include -#ifdef MDB_USE_POSIX_SEM -# define MDB_USE_HASH 1 -#include -#endif -#endif - -#ifdef USE_VALGRIND -#include -#define VGMEMP_CREATE(h,r,z) VALGRIND_CREATE_MEMPOOL(h,r,z) -#define VGMEMP_ALLOC(h,a,s) VALGRIND_MEMPOOL_ALLOC(h,a,s) -#define VGMEMP_FREE(h,a) VALGRIND_MEMPOOL_FREE(h,a) -#define VGMEMP_DESTROY(h) VALGRIND_DESTROY_MEMPOOL(h) -#define VGMEMP_DEFINED(a,s) VALGRIND_MAKE_MEM_DEFINED(a,s) -#else -#define VGMEMP_CREATE(h,r,z) -#define VGMEMP_ALLOC(h,a,s) -#define VGMEMP_FREE(h,a) -#define VGMEMP_DESTROY(h) -#define VGMEMP_DEFINED(a,s) -#endif - -#ifndef BYTE_ORDER -# if (defined(_LITTLE_ENDIAN) || defined(_BIG_ENDIAN)) && !(defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN)) -/* Solaris just defines one or the other */ -# define LITTLE_ENDIAN 1234 -# define BIG_ENDIAN 4321 -# ifdef _LITTLE_ENDIAN -# define BYTE_ORDER LITTLE_ENDIAN -# else -# define BYTE_ORDER BIG_ENDIAN -# endif -# else -# define BYTE_ORDER __BYTE_ORDER -# endif -#endif - -#ifndef LITTLE_ENDIAN -#define LITTLE_ENDIAN __LITTLE_ENDIAN -#endif -#ifndef BIG_ENDIAN -#define BIG_ENDIAN __BIG_ENDIAN -#endif - -#if defined(__i386) || defined(__x86_64) || defined(_M_IX86) -#define MISALIGNED_OK 1 -#endif - -#include "lmdb.h" -#include "midl.h" - -#if (BYTE_ORDER == LITTLE_ENDIAN) == (BYTE_ORDER == BIG_ENDIAN) -# error "Unknown or unsupported endianness (BYTE_ORDER)" -#elif (-6 & 5) || CHAR_BIT != 8 || UINT_MAX < 0xffffffff || ULONG_MAX % 0xFFFF -# error "Two's complement, reasonably sized integer types, please" -#endif - -#ifdef __GNUC__ -/** Put infrequently used env functions in separate section */ -# ifdef __APPLE__ -# define ESECT __attribute__ ((section("__TEXT,text_env"))) -# else -# define ESECT __attribute__ ((section("text_env"))) -# endif -#else -#define ESECT -#endif - -/** @defgroup internal LMDB Internals - * @{ - */ -/** @defgroup compat Compatibility Macros - * A bunch of macros to minimize the amount of platform-specific ifdefs - * needed throughout the rest of the code. When the features this library - * needs are similar enough to POSIX to be hidden in a one-or-two line - * replacement, this macro approach is used. - * @{ - */ - - /** Features under development */ -#ifndef MDB_DEVEL -#define MDB_DEVEL 0 -#endif - - /** Wrapper around __func__, which is a C99 feature */ -#if __STDC_VERSION__ >= 199901L -# define mdb_func_ __func__ -#elif __GNUC__ >= 2 || _MSC_VER >= 1300 -# define mdb_func_ __FUNCTION__ -#else -/* If a debug message says (), update the #if statements above */ -# define mdb_func_ "" -#endif - -#ifdef _WIN32 -#define MDB_USE_HASH 1 -#define MDB_PIDLOCK 0 -#define THREAD_RET DWORD -#define pthread_t HANDLE -#define pthread_mutex_t HANDLE -#define pthread_cond_t HANDLE -#define pthread_key_t DWORD -#define pthread_self() GetCurrentThreadId() -#define pthread_key_create(x,y) \ - ((*(x) = TlsAlloc()) == TLS_OUT_OF_INDEXES ? ErrCode() : 0) -#define pthread_key_delete(x) TlsFree(x) -#define pthread_getspecific(x) TlsGetValue(x) -#define pthread_setspecific(x,y) (TlsSetValue(x,y) ? 0 : ErrCode()) -#define pthread_mutex_unlock(x) ReleaseMutex(*x) -#define pthread_mutex_lock(x) WaitForSingleObject(*x, INFINITE) -#define pthread_cond_signal(x) SetEvent(*x) -#define pthread_cond_wait(cond,mutex) do{SignalObjectAndWait(*mutex, *cond, INFINITE, FALSE); WaitForSingleObject(*mutex, INFINITE);}while(0) -#define THREAD_CREATE(thr,start,arg) thr=CreateThread(NULL,0,start,arg,0,NULL) -#define THREAD_FINISH(thr) WaitForSingleObject(thr, INFINITE) -#define LOCK_MUTEX_R(env) pthread_mutex_lock(&(env)->me_rmutex) -#define UNLOCK_MUTEX_R(env) pthread_mutex_unlock(&(env)->me_rmutex) -#define LOCK_MUTEX_W(env) pthread_mutex_lock(&(env)->me_wmutex) -#define UNLOCK_MUTEX_W(env) pthread_mutex_unlock(&(env)->me_wmutex) -#define getpid() GetCurrentProcessId() -#define MDB_FDATASYNC(fd) (!FlushFileBuffers(fd)) -#define MDB_MSYNC(addr,len,flags) (!FlushViewOfFile(addr,len)) -#define ErrCode() GetLastError() -#define GET_PAGESIZE(x) {SYSTEM_INFO si; GetSystemInfo(&si); (x) = si.dwPageSize;} -#define close(fd) (CloseHandle(fd) ? 0 : -1) -#define munmap(ptr,len) UnmapViewOfFile(ptr) -#ifdef PROCESS_QUERY_LIMITED_INFORMATION -#define MDB_PROCESS_QUERY_LIMITED_INFORMATION PROCESS_QUERY_LIMITED_INFORMATION -#else -#define MDB_PROCESS_QUERY_LIMITED_INFORMATION 0x1000 -#endif -#define Z "I" -#else -#define THREAD_RET void * -#define THREAD_CREATE(thr,start,arg) pthread_create(&thr,NULL,start,arg) -#define THREAD_FINISH(thr) pthread_join(thr,NULL) -#define Z "z" /**< printf format modifier for size_t */ - - /** For MDB_LOCK_FORMAT: True if readers take a pid lock in the lockfile */ -#define MDB_PIDLOCK 1 - -#ifdef MDB_USE_POSIX_SEM - -#define LOCK_MUTEX_R(env) mdb_sem_wait((env)->me_rmutex) -#define UNLOCK_MUTEX_R(env) sem_post((env)->me_rmutex) -#define LOCK_MUTEX_W(env) mdb_sem_wait((env)->me_wmutex) -#define UNLOCK_MUTEX_W(env) sem_post((env)->me_wmutex) - -static int -mdb_sem_wait(sem_t *sem) -{ - int rc; - while ((rc = sem_wait(sem)) && (rc = errno) == EINTR) ; - return rc; -} - -#else - /** Lock the reader mutex. - */ -#define LOCK_MUTEX_R(env) pthread_mutex_lock(&(env)->me_txns->mti_mutex) - /** Unlock the reader mutex. - */ -#define UNLOCK_MUTEX_R(env) pthread_mutex_unlock(&(env)->me_txns->mti_mutex) - - /** Lock the writer mutex. - * Only a single write transaction is allowed at a time. Other writers - * will block waiting for this mutex. - */ -#define LOCK_MUTEX_W(env) pthread_mutex_lock(&(env)->me_txns->mti_wmutex) - /** Unlock the writer mutex. - */ -#define UNLOCK_MUTEX_W(env) pthread_mutex_unlock(&(env)->me_txns->mti_wmutex) -#endif /* MDB_USE_POSIX_SEM */ - - /** Get the error code for the last failed system function. - */ -#define ErrCode() errno - - /** An abstraction for a file handle. - * On POSIX systems file handles are small integers. On Windows - * they're opaque pointers. - */ -#define HANDLE int - - /** A value for an invalid file handle. - * Mainly used to initialize file variables and signify that they are - * unused. - */ -#define INVALID_HANDLE_VALUE (-1) - - /** Get the size of a memory page for the system. - * This is the basic size that the platform's memory manager uses, and is - * fundamental to the use of memory-mapped files. - */ -#define GET_PAGESIZE(x) ((x) = sysconf(_SC_PAGE_SIZE)) -#endif - -#if defined(_WIN32) || defined(MDB_USE_POSIX_SEM) -#define MNAME_LEN 32 -#else -#define MNAME_LEN (sizeof(pthread_mutex_t)) -#endif - -/** @} */ - -#ifndef _WIN32 -/** A flag for opening a file and requesting synchronous data writes. - * This is only used when writing a meta page. It's not strictly needed; - * we could just do a normal write and then immediately perform a flush. - * But if this flag is available it saves us an extra system call. - * - * @note If O_DSYNC is undefined but exists in /usr/include, - * preferably set some compiler flag to get the definition. - * Otherwise compile with the less efficient -DMDB_DSYNC=O_SYNC. - */ -#ifndef MDB_DSYNC -# define MDB_DSYNC O_DSYNC -#endif -#endif - -/** Function for flushing the data of a file. Define this to fsync - * if fdatasync() is not supported. - */ -#ifndef MDB_FDATASYNC -# define MDB_FDATASYNC fdatasync -#endif - -#ifndef MDB_MSYNC -# define MDB_MSYNC(addr,len,flags) msync(addr,len,flags) -#endif - -#ifndef MS_SYNC -#define MS_SYNC 1 -#endif - -#ifndef MS_ASYNC -#define MS_ASYNC 0 -#endif - - /** A page number in the database. - * Note that 64 bit page numbers are overkill, since pages themselves - * already represent 12-13 bits of addressable memory, and the OS will - * always limit applications to a maximum of 63 bits of address space. - * - * @note In the #MDB_node structure, we only store 48 bits of this value, - * which thus limits us to only 60 bits of addressable data. - */ -typedef MDB_ID pgno_t; - - /** A transaction ID. - * See struct MDB_txn.mt_txnid for details. - */ -typedef MDB_ID txnid_t; - -/** @defgroup debug Debug Macros - * @{ - */ -#ifndef MDB_DEBUG - /** Enable debug output. Needs variable argument macros (a C99 feature). - * Set this to 1 for copious tracing. Set to 2 to add dumps of all IDLs - * read from and written to the database (used for free space management). - */ -#define MDB_DEBUG 0 -#endif - -#if MDB_DEBUG -static int mdb_debug; -static txnid_t mdb_debug_start; - - /** Print a debug message with printf formatting. - * Requires double parenthesis around 2 or more args. - */ -# define DPRINTF(args) ((void) ((mdb_debug) && DPRINTF0 args)) -# define DPRINTF0(fmt, ...) \ - fprintf(stderr, "%s:%d " fmt "\n", mdb_func_, __LINE__, __VA_ARGS__) -#else -# define DPRINTF(args) ((void) 0) -#endif - /** Print a debug string. - * The string is printed literally, with no format processing. - */ -#define DPUTS(arg) DPRINTF(("%s", arg)) - /** Debuging output value of a cursor DBI: Negative in a sub-cursor. */ -#define DDBI(mc) \ - (((mc)->mc_flags & C_SUB) ? -(int)(mc)->mc_dbi : (int)(mc)->mc_dbi) -/** @} */ - - /** @brief The maximum size of a database page. - * - * It is 32k or 64k, since value-PAGEBASE must fit in - * #MDB_page.%mp_upper. - * - * LMDB will use database pages < OS pages if needed. - * That causes more I/O in write transactions: The OS must - * know (read) the whole page before writing a partial page. - * - * Note that we don't currently support Huge pages. On Linux, - * regular data files cannot use Huge pages, and in general - * Huge pages aren't actually pageable. We rely on the OS - * demand-pager to read our data and page it out when memory - * pressure from other processes is high. So until OSs have - * actual paging support for Huge pages, they're not viable. - */ -#define MAX_PAGESIZE (PAGEBASE ? 0x10000 : 0x8000) - - /** The minimum number of keys required in a database page. - * Setting this to a larger value will place a smaller bound on the - * maximum size of a data item. Data items larger than this size will - * be pushed into overflow pages instead of being stored directly in - * the B-tree node. This value used to default to 4. With a page size - * of 4096 bytes that meant that any item larger than 1024 bytes would - * go into an overflow page. That also meant that on average 2-3KB of - * each overflow page was wasted space. The value cannot be lower than - * 2 because then there would no longer be a tree structure. With this - * value, items larger than 2KB will go into overflow pages, and on - * average only 1KB will be wasted. - */ -#define MDB_MINKEYS 2 - - /** A stamp that identifies a file as an LMDB file. - * There's nothing special about this value other than that it is easily - * recognizable, and it will reflect any byte order mismatches. - */ -#define MDB_MAGIC 0xBEEFC0DE - - /** The version number for a database's datafile format. */ -#define MDB_DATA_VERSION ((MDB_DEVEL) ? 999 : 1) - /** The version number for a database's lockfile format. */ -#define MDB_LOCK_VERSION 1 - - /** @brief The max size of a key we can write, or 0 for computed max. - * - * This macro should normally be left alone or set to 0. - * Note that a database with big keys or dupsort data cannot be - * reliably modified by a liblmdb which uses a smaller max. - * The default is 511 for backwards compat, or 0 when #MDB_DEVEL. - * - * Other values are allowed, for backwards compat. However: - * A value bigger than the computed max can break if you do not - * know what you are doing, and liblmdb <= 0.9.10 can break when - * modifying a DB with keys/dupsort data bigger than its max. - * - * Data items in an #MDB_DUPSORT database are also limited to - * this size, since they're actually keys of a sub-DB. Keys and - * #MDB_DUPSORT data items must fit on a node in a regular page. - */ -#ifndef MDB_MAXKEYSIZE -#define MDB_MAXKEYSIZE ((MDB_DEVEL) ? 0 : 511) -#endif - - /** The maximum size of a key we can write to the environment. */ -#if MDB_MAXKEYSIZE -#define ENV_MAXKEY(env) (MDB_MAXKEYSIZE) -#else -#define ENV_MAXKEY(env) ((env)->me_maxkey) -#endif - - /** @brief The maximum size of a data item. - * - * We only store a 32 bit value for node sizes. - */ -#define MAXDATASIZE 0xffffffffUL - -#if MDB_DEBUG - /** Key size which fits in a #DKBUF. - * @ingroup debug - */ -#define DKBUF_MAXKEYSIZE ((MDB_MAXKEYSIZE) > 0 ? (MDB_MAXKEYSIZE) : 511) - /** A key buffer. - * @ingroup debug - * This is used for printing a hex dump of a key's contents. - */ -#define DKBUF char kbuf[DKBUF_MAXKEYSIZE*2+1] - /** Display a key in hex. - * @ingroup debug - * Invoke a function to display a key in hex. - */ -#define DKEY(x) mdb_dkey(x, kbuf) -#else -#define DKBUF -#define DKEY(x) 0 -#endif - - /** An invalid page number. - * Mainly used to denote an empty tree. - */ -#define P_INVALID (~(pgno_t)0) - - /** Test if the flags \b f are set in a flag word \b w. */ -#define F_ISSET(w, f) (((w) & (f)) == (f)) - - /** Round \b n up to an even number. */ -#define EVEN(n) (((n) + 1U) & -2) /* sign-extending -2 to match n+1U */ - - /** Used for offsets within a single page. - * Since memory pages are typically 4 or 8KB in size, 12-13 bits, - * this is plenty. - */ -typedef uint16_t indx_t; - - /** Default size of memory map. - * This is certainly too small for any actual applications. Apps should always set - * the size explicitly using #mdb_env_set_mapsize(). - */ -#define DEFAULT_MAPSIZE 1048576 - -/** @defgroup readers Reader Lock Table - * Readers don't acquire any locks for their data access. Instead, they - * simply record their transaction ID in the reader table. The reader - * mutex is needed just to find an empty slot in the reader table. The - * slot's address is saved in thread-specific data so that subsequent read - * transactions started by the same thread need no further locking to proceed. - * - * If #MDB_NOTLS is set, the slot address is not saved in thread-specific data. - * - * No reader table is used if the database is on a read-only filesystem, or - * if #MDB_NOLOCK is set. - * - * Since the database uses multi-version concurrency control, readers don't - * actually need any locking. This table is used to keep track of which - * readers are using data from which old transactions, so that we'll know - * when a particular old transaction is no longer in use. Old transactions - * that have discarded any data pages can then have those pages reclaimed - * for use by a later write transaction. - * - * The lock table is constructed such that reader slots are aligned with the - * processor's cache line size. Any slot is only ever used by one thread. - * This alignment guarantees that there will be no contention or cache - * thrashing as threads update their own slot info, and also eliminates - * any need for locking when accessing a slot. - * - * A writer thread will scan every slot in the table to determine the oldest - * outstanding reader transaction. Any freed pages older than this will be - * reclaimed by the writer. The writer doesn't use any locks when scanning - * this table. This means that there's no guarantee that the writer will - * see the most up-to-date reader info, but that's not required for correct - * operation - all we need is to know the upper bound on the oldest reader, - * we don't care at all about the newest reader. So the only consequence of - * reading stale information here is that old pages might hang around a - * while longer before being reclaimed. That's actually good anyway, because - * the longer we delay reclaiming old pages, the more likely it is that a - * string of contiguous pages can be found after coalescing old pages from - * many old transactions together. - * @{ - */ - /** Number of slots in the reader table. - * This value was chosen somewhat arbitrarily. 126 readers plus a - * couple mutexes fit exactly into 8KB on my development machine. - * Applications should set the table size using #mdb_env_set_maxreaders(). - */ -#define DEFAULT_READERS 126 - - /** The size of a CPU cache line in bytes. We want our lock structures - * aligned to this size to avoid false cache line sharing in the - * lock table. - * This value works for most CPUs. For Itanium this should be 128. - */ -#ifndef CACHELINE -#define CACHELINE 64 -#endif - - /** The information we store in a single slot of the reader table. - * In addition to a transaction ID, we also record the process and - * thread ID that owns a slot, so that we can detect stale information, - * e.g. threads or processes that went away without cleaning up. - * @note We currently don't check for stale records. We simply re-init - * the table when we know that we're the only process opening the - * lock file. - */ -typedef struct MDB_rxbody { - /** Current Transaction ID when this transaction began, or (txnid_t)-1. - * Multiple readers that start at the same time will probably have the - * same ID here. Again, it's not important to exclude them from - * anything; all we need to know is which version of the DB they - * started from so we can avoid overwriting any data used in that - * particular version. - */ - volatile txnid_t mrb_txnid; - /** The process ID of the process owning this reader txn. */ - volatile MDB_PID_T mrb_pid; - /** The thread ID of the thread owning this txn. */ - volatile MDB_THR_T mrb_tid; -} MDB_rxbody; - - /** The actual reader record, with cacheline padding. */ -typedef struct MDB_reader { - union { - MDB_rxbody mrx; - /** shorthand for mrb_txnid */ -#define mr_txnid mru.mrx.mrb_txnid -#define mr_pid mru.mrx.mrb_pid -#define mr_tid mru.mrx.mrb_tid - /** cache line alignment */ - char pad[(sizeof(MDB_rxbody)+CACHELINE-1) & ~(CACHELINE-1)]; - } mru; -} MDB_reader; - - /** The header for the reader table. - * The table resides in a memory-mapped file. (This is a different file - * than is used for the main database.) - * - * For POSIX the actual mutexes reside in the shared memory of this - * mapped file. On Windows, mutexes are named objects allocated by the - * kernel; we store the mutex names in this mapped file so that other - * processes can grab them. This same approach is also used on - * MacOSX/Darwin (using named semaphores) since MacOSX doesn't support - * process-shared POSIX mutexes. For these cases where a named object - * is used, the object name is derived from a 64 bit FNV hash of the - * environment pathname. As such, naming collisions are extremely - * unlikely. If a collision occurs, the results are unpredictable. - */ -typedef struct MDB_txbody { - /** Stamp identifying this as an LMDB file. It must be set - * to #MDB_MAGIC. */ - uint32_t mtb_magic; - /** Format of this lock file. Must be set to #MDB_LOCK_FORMAT. */ - uint32_t mtb_format; -#if defined(_WIN32) || defined(MDB_USE_POSIX_SEM) - char mtb_rmname[MNAME_LEN]; -#else - /** Mutex protecting access to this table. - * This is the reader lock that #LOCK_MUTEX_R acquires. - */ - pthread_mutex_t mtb_mutex; -#endif - /** The ID of the last transaction committed to the database. - * This is recorded here only for convenience; the value can always - * be determined by reading the main database meta pages. - */ - volatile txnid_t mtb_txnid; - /** The number of slots that have been used in the reader table. - * This always records the maximum count, it is not decremented - * when readers release their slots. - */ - volatile unsigned mtb_numreaders; -} MDB_txbody; - - /** The actual reader table definition. */ -typedef struct MDB_txninfo { - union { - MDB_txbody mtb; -#define mti_magic mt1.mtb.mtb_magic -#define mti_format mt1.mtb.mtb_format -#define mti_mutex mt1.mtb.mtb_mutex -#define mti_rmname mt1.mtb.mtb_rmname -#define mti_txnid mt1.mtb.mtb_txnid -#define mti_numreaders mt1.mtb.mtb_numreaders - char pad[(sizeof(MDB_txbody)+CACHELINE-1) & ~(CACHELINE-1)]; - } mt1; - union { -#if defined(_WIN32) || defined(MDB_USE_POSIX_SEM) - char mt2_wmname[MNAME_LEN]; -#define mti_wmname mt2.mt2_wmname -#else - pthread_mutex_t mt2_wmutex; -#define mti_wmutex mt2.mt2_wmutex -#endif - char pad[(MNAME_LEN+CACHELINE-1) & ~(CACHELINE-1)]; - } mt2; - MDB_reader mti_readers[1]; -} MDB_txninfo; - - /** Lockfile format signature: version, features and field layout */ -#define MDB_LOCK_FORMAT \ - ((uint32_t) \ - ((MDB_LOCK_VERSION) \ - /* Flags which describe functionality */ \ - + (((MDB_PIDLOCK) != 0) << 16))) -/** @} */ - -/** Common header for all page types. - * Overflow records occupy a number of contiguous pages with no - * headers on any page after the first. - */ -typedef struct MDB_page { -#define mp_pgno mp_p.p_pgno -#define mp_next mp_p.p_next - union { - pgno_t p_pgno; /**< page number */ - struct MDB_page *p_next; /**< for in-memory list of freed pages */ - } mp_p; - uint16_t mp_pad; -/** @defgroup mdb_page Page Flags - * @ingroup internal - * Flags for the page headers. - * @{ - */ -#define P_BRANCH 0x01 /**< branch page */ -#define P_LEAF 0x02 /**< leaf page */ -#define P_OVERFLOW 0x04 /**< overflow page */ -#define P_META 0x08 /**< meta page */ -#define P_DIRTY 0x10 /**< dirty page, also set for #P_SUBP pages */ -#define P_LEAF2 0x20 /**< for #MDB_DUPFIXED records */ -#define P_SUBP 0x40 /**< for #MDB_DUPSORT sub-pages */ -#define P_LOOSE 0x4000 /**< page was dirtied then freed, can be reused */ -#define P_KEEP 0x8000 /**< leave this page alone during spill */ -/** @} */ - uint16_t mp_flags; /**< @ref mdb_page */ -#define mp_lower mp_pb.pb.pb_lower -#define mp_upper mp_pb.pb.pb_upper -#define mp_pages mp_pb.pb_pages - union { - struct { - indx_t pb_lower; /**< lower bound of free space */ - indx_t pb_upper; /**< upper bound of free space */ - } pb; - uint32_t pb_pages; /**< number of overflow pages */ - } mp_pb; - indx_t mp_ptrs[1]; /**< dynamic size */ -} MDB_page; - - /** Size of the page header, excluding dynamic data at the end */ -#define PAGEHDRSZ ((unsigned) offsetof(MDB_page, mp_ptrs)) - - /** Address of first usable data byte in a page, after the header */ -#define METADATA(p) ((void *)((char *)(p) + PAGEHDRSZ)) - - /** ITS#7713, change PAGEBASE to handle 65536 byte pages */ -#define PAGEBASE ((MDB_DEVEL) ? PAGEHDRSZ : 0) - - /** Number of nodes on a page */ -#define NUMKEYS(p) (((p)->mp_lower - (PAGEHDRSZ-PAGEBASE)) >> 1) - - /** The amount of space remaining in the page */ -#define SIZELEFT(p) (indx_t)((p)->mp_upper - (p)->mp_lower) - - /** The percentage of space used in the page, in tenths of a percent. */ -#define PAGEFILL(env, p) (1000L * ((env)->me_psize - PAGEHDRSZ - SIZELEFT(p)) / \ - ((env)->me_psize - PAGEHDRSZ)) - /** The minimum page fill factor, in tenths of a percent. - * Pages emptier than this are candidates for merging. - */ -#define FILL_THRESHOLD 250 - - /** Test if a page is a leaf page */ -#define IS_LEAF(p) F_ISSET((p)->mp_flags, P_LEAF) - /** Test if a page is a LEAF2 page */ -#define IS_LEAF2(p) F_ISSET((p)->mp_flags, P_LEAF2) - /** Test if a page is a branch page */ -#define IS_BRANCH(p) F_ISSET((p)->mp_flags, P_BRANCH) - /** Test if a page is an overflow page */ -#define IS_OVERFLOW(p) F_ISSET((p)->mp_flags, P_OVERFLOW) - /** Test if a page is a sub page */ -#define IS_SUBP(p) F_ISSET((p)->mp_flags, P_SUBP) - - /** The number of overflow pages needed to store the given size. */ -#define OVPAGES(size, psize) ((PAGEHDRSZ-1 + (size)) / (psize) + 1) - - /** Link in #MDB_txn.%mt_loose_pgs list */ -#define NEXT_LOOSE_PAGE(p) (*(MDB_page **)((p) + 2)) - - /** Header for a single key/data pair within a page. - * Used in pages of type #P_BRANCH and #P_LEAF without #P_LEAF2. - * We guarantee 2-byte alignment for 'MDB_node's. - */ -typedef struct MDB_node { - /** lo and hi are used for data size on leaf nodes and for - * child pgno on branch nodes. On 64 bit platforms, flags - * is also used for pgno. (Branch nodes have no flags). - * They are in host byte order in case that lets some - * accesses be optimized into a 32-bit word access. - */ -#if BYTE_ORDER == LITTLE_ENDIAN - unsigned short mn_lo, mn_hi; /**< part of data size or pgno */ -#else - unsigned short mn_hi, mn_lo; -#endif -/** @defgroup mdb_node Node Flags - * @ingroup internal - * Flags for node headers. - * @{ - */ -#define F_BIGDATA 0x01 /**< data put on overflow page */ -#define F_SUBDATA 0x02 /**< data is a sub-database */ -#define F_DUPDATA 0x04 /**< data has duplicates */ - -/** valid flags for #mdb_node_add() */ -#define NODE_ADD_FLAGS (F_DUPDATA|F_SUBDATA|MDB_RESERVE|MDB_APPEND) - -/** @} */ - unsigned short mn_flags; /**< @ref mdb_node */ - unsigned short mn_ksize; /**< key size */ - char mn_data[1]; /**< key and data are appended here */ -} MDB_node; - - /** Size of the node header, excluding dynamic data at the end */ -#define NODESIZE offsetof(MDB_node, mn_data) - - /** Bit position of top word in page number, for shifting mn_flags */ -#define PGNO_TOPWORD ((pgno_t)-1 > 0xffffffffu ? 32 : 0) - - /** Size of a node in a branch page with a given key. - * This is just the node header plus the key, there is no data. - */ -#define INDXSIZE(k) (NODESIZE + ((k) == NULL ? 0 : (k)->mv_size)) - - /** Size of a node in a leaf page with a given key and data. - * This is node header plus key plus data size. - */ -#define LEAFSIZE(k, d) (NODESIZE + (k)->mv_size + (d)->mv_size) - - /** Address of node \b i in page \b p */ -#define NODEPTR(p, i) ((MDB_node *)((char *)(p) + (p)->mp_ptrs[i] + PAGEBASE)) - - /** Address of the key for the node */ -#define NODEKEY(node) (void *)((node)->mn_data) - - /** Address of the data for a node */ -#define NODEDATA(node) (void *)((char *)(node)->mn_data + (node)->mn_ksize) - - /** Get the page number pointed to by a branch node */ -#define NODEPGNO(node) \ - ((node)->mn_lo | ((pgno_t) (node)->mn_hi << 16) | \ - (PGNO_TOPWORD ? ((pgno_t) (node)->mn_flags << PGNO_TOPWORD) : 0)) - /** Set the page number in a branch node */ -#define SETPGNO(node,pgno) do { \ - (node)->mn_lo = (pgno) & 0xffff; (node)->mn_hi = (pgno) >> 16; \ - if (PGNO_TOPWORD) (node)->mn_flags = (pgno) >> PGNO_TOPWORD; } while(0) - - /** Get the size of the data in a leaf node */ -#define NODEDSZ(node) ((node)->mn_lo | ((unsigned)(node)->mn_hi << 16)) - /** Set the size of the data for a leaf node */ -#define SETDSZ(node,size) do { \ - (node)->mn_lo = (size) & 0xffff; (node)->mn_hi = (size) >> 16;} while(0) - /** The size of a key in a node */ -#define NODEKSZ(node) ((node)->mn_ksize) - - /** Copy a page number from src to dst */ -#ifdef MISALIGNED_OK -#define COPY_PGNO(dst,src) dst = src -#else -#if SIZE_MAX > 4294967295UL -#define COPY_PGNO(dst,src) do { \ - unsigned short *s, *d; \ - s = (unsigned short *)&(src); \ - d = (unsigned short *)&(dst); \ - *d++ = *s++; \ - *d++ = *s++; \ - *d++ = *s++; \ - *d = *s; \ -} while (0) -#else -#define COPY_PGNO(dst,src) do { \ - unsigned short *s, *d; \ - s = (unsigned short *)&(src); \ - d = (unsigned short *)&(dst); \ - *d++ = *s++; \ - *d = *s; \ -} while (0) -#endif -#endif - /** The address of a key in a LEAF2 page. - * LEAF2 pages are used for #MDB_DUPFIXED sorted-duplicate sub-DBs. - * There are no node headers, keys are stored contiguously. - */ -#define LEAF2KEY(p, i, ks) ((char *)(p) + PAGEHDRSZ + ((i)*(ks))) - - /** Set the \b node's key into \b keyptr, if requested. */ -#define MDB_GET_KEY(node, keyptr) { if ((keyptr) != NULL) { \ - (keyptr)->mv_size = NODEKSZ(node); (keyptr)->mv_data = NODEKEY(node); } } - - /** Set the \b node's key into \b key. */ -#define MDB_GET_KEY2(node, key) { key.mv_size = NODEKSZ(node); key.mv_data = NODEKEY(node); } - - /** Information about a single database in the environment. */ -typedef struct MDB_db { - uint32_t md_pad; /**< also ksize for LEAF2 pages */ - uint16_t md_flags; /**< @ref mdb_dbi_open */ - uint16_t md_depth; /**< depth of this tree */ - pgno_t md_branch_pages; /**< number of internal pages */ - pgno_t md_leaf_pages; /**< number of leaf pages */ - pgno_t md_overflow_pages; /**< number of overflow pages */ - size_t md_entries; /**< number of data items */ - pgno_t md_root; /**< the root page of this tree */ -} MDB_db; - - /** mdb_dbi_open flags */ -#define MDB_VALID 0x8000 /**< DB handle is valid, for me_dbflags */ -#define PERSISTENT_FLAGS (0xffff & ~(MDB_VALID)) -#define VALID_FLAGS (MDB_REVERSEKEY|MDB_DUPSORT|MDB_INTEGERKEY|MDB_DUPFIXED|\ - MDB_INTEGERDUP|MDB_REVERSEDUP|MDB_CREATE) - - /** Handle for the DB used to track free pages. */ -#define FREE_DBI 0 - /** Handle for the default DB. */ -#define MAIN_DBI 1 - - /** Meta page content. - * A meta page is the start point for accessing a database snapshot. - * Pages 0-1 are meta pages. Transaction N writes meta page #(N % 2). - */ -typedef struct MDB_meta { - /** Stamp identifying this as an LMDB file. It must be set - * to #MDB_MAGIC. */ - uint32_t mm_magic; - /** Version number of this file. Must be set to #MDB_DATA_VERSION. */ - uint32_t mm_version; - void *mm_address; /**< address for fixed mapping */ - size_t mm_mapsize; /**< size of mmap region */ - MDB_db mm_dbs[2]; /**< first is free space, 2nd is main db */ - /** The size of pages used in this DB */ -#define mm_psize mm_dbs[0].md_pad - /** Any persistent environment flags. @ref mdb_env */ -#define mm_flags mm_dbs[0].md_flags - pgno_t mm_last_pg; /**< last used page in file */ - volatile txnid_t mm_txnid; /**< txnid that committed this page */ -} MDB_meta; - - /** Buffer for a stack-allocated meta page. - * The members define size and alignment, and silence type - * aliasing warnings. They are not used directly; that could - * mean incorrectly using several union members in parallel. - */ -typedef union MDB_metabuf { - MDB_page mb_page; - struct { - char mm_pad[PAGEHDRSZ]; - MDB_meta mm_meta; - } mb_metabuf; -} MDB_metabuf; - - /** Auxiliary DB info. - * The information here is mostly static/read-only. There is - * only a single copy of this record in the environment. - */ -typedef struct MDB_dbx { - MDB_val md_name; /**< name of the database */ - MDB_cmp_func *md_cmp; /**< function for comparing keys */ - MDB_cmp_func *md_dcmp; /**< function for comparing data items */ - MDB_rel_func *md_rel; /**< user relocate function */ - void *md_relctx; /**< user-provided context for md_rel */ -} MDB_dbx; - - /** A database transaction. - * Every operation requires a transaction handle. - */ -struct MDB_txn { - MDB_txn *mt_parent; /**< parent of a nested txn */ - MDB_txn *mt_child; /**< nested txn under this txn */ - pgno_t mt_next_pgno; /**< next unallocated page */ - /** The ID of this transaction. IDs are integers incrementing from 1. - * Only committed write transactions increment the ID. If a transaction - * aborts, the ID may be re-used by the next writer. - */ - txnid_t mt_txnid; - MDB_env *mt_env; /**< the DB environment */ - /** The list of pages that became unused during this transaction. - */ - MDB_IDL mt_free_pgs; - /** The list of loose pages that became unused and may be reused - * in this transaction, linked through #NEXT_LOOSE_PAGE(page). - */ - MDB_page *mt_loose_pgs; - /* #Number of loose pages (#mt_loose_pgs) */ - int mt_loose_count; - /** The sorted list of dirty pages we temporarily wrote to disk - * because the dirty list was full. page numbers in here are - * shifted left by 1, deleted slots have the LSB set. - */ - MDB_IDL mt_spill_pgs; - union { - /** For write txns: Modified pages. Sorted when not MDB_WRITEMAP. */ - MDB_ID2L dirty_list; - /** For read txns: This thread/txn's reader table slot, or NULL. */ - MDB_reader *reader; - } mt_u; - /** Array of records for each DB known in the environment. */ - MDB_dbx *mt_dbxs; - /** Array of MDB_db records for each known DB */ - MDB_db *mt_dbs; - /** Array of sequence numbers for each DB handle */ - unsigned int *mt_dbiseqs; -/** @defgroup mt_dbflag Transaction DB Flags - * @ingroup internal - * @{ - */ -#define DB_DIRTY 0x01 /**< DB was modified or is DUPSORT data */ -#define DB_STALE 0x02 /**< Named-DB record is older than txnID */ -#define DB_NEW 0x04 /**< Named-DB handle opened in this txn */ -#define DB_VALID 0x08 /**< DB handle is valid, see also #MDB_VALID */ -/** @} */ - /** In write txns, array of cursors for each DB */ - MDB_cursor **mt_cursors; - /** Array of flags for each DB */ - unsigned char *mt_dbflags; - /** Number of DB records in use. This number only ever increments; - * we don't decrement it when individual DB handles are closed. - */ - MDB_dbi mt_numdbs; - -/** @defgroup mdb_txn Transaction Flags - * @ingroup internal - * @{ - */ -#define MDB_TXN_RDONLY 0x01 /**< read-only transaction */ -#define MDB_TXN_ERROR 0x02 /**< txn is unusable after an error */ -#define MDB_TXN_DIRTY 0x04 /**< must write, even if dirty list is empty */ -#define MDB_TXN_SPILLS 0x08 /**< txn or a parent has spilled pages */ -/** @} */ - unsigned int mt_flags; /**< @ref mdb_txn */ - /** #dirty_list room: Array size - \#dirty pages visible to this txn. - * Includes ancestor txns' dirty pages not hidden by other txns' - * dirty/spilled pages. Thus commit(nested txn) has room to merge - * dirty_list into mt_parent after freeing hidden mt_parent pages. - */ - unsigned int mt_dirty_room; -}; - -/** Enough space for 2^32 nodes with minimum of 2 keys per node. I.e., plenty. - * At 4 keys per node, enough for 2^64 nodes, so there's probably no need to - * raise this on a 64 bit machine. - */ -#define CURSOR_STACK 32 - -struct MDB_xcursor; - - /** Cursors are used for all DB operations. - * A cursor holds a path of (page pointer, key index) from the DB - * root to a position in the DB, plus other state. #MDB_DUPSORT - * cursors include an xcursor to the current data item. Write txns - * track their cursors and keep them up to date when data moves. - * Exception: An xcursor's pointer to a #P_SUBP page can be stale. - * (A node with #F_DUPDATA but no #F_SUBDATA contains a subpage). - */ -struct MDB_cursor { - /** Next cursor on this DB in this txn */ - MDB_cursor *mc_next; - /** Backup of the original cursor if this cursor is a shadow */ - MDB_cursor *mc_backup; - /** Context used for databases with #MDB_DUPSORT, otherwise NULL */ - struct MDB_xcursor *mc_xcursor; - /** The transaction that owns this cursor */ - MDB_txn *mc_txn; - /** The database handle this cursor operates on */ - MDB_dbi mc_dbi; - /** The database record for this cursor */ - MDB_db *mc_db; - /** The database auxiliary record for this cursor */ - MDB_dbx *mc_dbx; - /** The @ref mt_dbflag for this database */ - unsigned char *mc_dbflag; - unsigned short mc_snum; /**< number of pushed pages */ - unsigned short mc_top; /**< index of top page, normally mc_snum-1 */ -/** @defgroup mdb_cursor Cursor Flags - * @ingroup internal - * Cursor state flags. - * @{ - */ -#define C_INITIALIZED 0x01 /**< cursor has been initialized and is valid */ -#define C_EOF 0x02 /**< No more data */ -#define C_SUB 0x04 /**< Cursor is a sub-cursor */ -#define C_DEL 0x08 /**< last op was a cursor_del */ -#define C_SPLITTING 0x20 /**< Cursor is in page_split */ -#define C_UNTRACK 0x40 /**< Un-track cursor when closing */ -/** @} */ - unsigned int mc_flags; /**< @ref mdb_cursor */ - MDB_page *mc_pg[CURSOR_STACK]; /**< stack of pushed pages */ - indx_t mc_ki[CURSOR_STACK]; /**< stack of page indices */ -}; - - /** Context for sorted-dup records. - * We could have gone to a fully recursive design, with arbitrarily - * deep nesting of sub-databases. But for now we only handle these - * levels - main DB, optional sub-DB, sorted-duplicate DB. - */ -typedef struct MDB_xcursor { - /** A sub-cursor for traversing the Dup DB */ - MDB_cursor mx_cursor; - /** The database record for this Dup DB */ - MDB_db mx_db; - /** The auxiliary DB record for this Dup DB */ - MDB_dbx mx_dbx; - /** The @ref mt_dbflag for this Dup DB */ - unsigned char mx_dbflag; -} MDB_xcursor; - - /** State of FreeDB old pages, stored in the MDB_env */ -typedef struct MDB_pgstate { - pgno_t *mf_pghead; /**< Reclaimed freeDB pages, or NULL before use */ - txnid_t mf_pglast; /**< ID of last used record, or 0 if !mf_pghead */ -} MDB_pgstate; - - /** The database environment. */ -struct MDB_env { - HANDLE me_fd; /**< The main data file */ - HANDLE me_lfd; /**< The lock file */ - HANDLE me_mfd; /**< just for writing the meta pages */ - /** Failed to update the meta page. Probably an I/O error. */ -#define MDB_FATAL_ERROR 0x80000000U - /** Some fields are initialized. */ -#define MDB_ENV_ACTIVE 0x20000000U - /** me_txkey is set */ -#define MDB_ENV_TXKEY 0x10000000U - /** fdatasync is unreliable */ -#define MDB_FSYNCONLY 0x08000000U - uint32_t me_flags; /**< @ref mdb_env */ - unsigned int me_psize; /**< DB page size, inited from me_os_psize */ - unsigned int me_os_psize; /**< OS page size, from #GET_PAGESIZE */ - unsigned int me_maxreaders; /**< size of the reader table */ - unsigned int me_numreaders; /**< max numreaders set by this env */ - MDB_dbi me_numdbs; /**< number of DBs opened */ - MDB_dbi me_maxdbs; /**< size of the DB table */ - MDB_PID_T me_pid; /**< process ID of this env */ - char *me_path; /**< path to the DB files */ - char *me_map; /**< the memory map of the data file */ - MDB_txninfo *me_txns; /**< the memory map of the lock file or NULL */ - MDB_meta *me_metas[2]; /**< pointers to the two meta pages */ - void *me_pbuf; /**< scratch area for DUPSORT put() */ - MDB_txn *me_txn; /**< current write transaction */ - MDB_txn *me_txn0; /**< prealloc'd write transaction */ - size_t me_mapsize; /**< size of the data memory map */ - off_t me_size; /**< current file size */ - pgno_t me_maxpg; /**< me_mapsize / me_psize */ - MDB_dbx *me_dbxs; /**< array of static DB info */ - uint16_t *me_dbflags; /**< array of flags from MDB_db.md_flags */ - unsigned int *me_dbiseqs; /**< array of dbi sequence numbers */ - pthread_key_t me_txkey; /**< thread-key for readers */ - txnid_t me_pgoldest; /**< ID of oldest reader last time we looked */ - MDB_pgstate me_pgstate; /**< state of old pages from freeDB */ -# define me_pglast me_pgstate.mf_pglast -# define me_pghead me_pgstate.mf_pghead - MDB_page *me_dpages; /**< list of malloc'd blocks for re-use */ - /** IDL of pages that became unused in a write txn */ - MDB_IDL me_free_pgs; - /** ID2L of pages written during a write txn. Length MDB_IDL_UM_SIZE. */ - MDB_ID2L me_dirty_list; - /** Max number of freelist items that can fit in a single overflow page */ - int me_maxfree_1pg; - /** Max size of a node on a page */ - unsigned int me_nodemax; -#if !(MDB_MAXKEYSIZE) - unsigned int me_maxkey; /**< max size of a key */ -#endif - int me_live_reader; /**< have liveness lock in reader table */ -#ifdef _WIN32 - int me_pidquery; /**< Used in OpenProcess */ - HANDLE me_rmutex; /* Windows mutexes don't reside in shared mem */ - HANDLE me_wmutex; -#elif defined(MDB_USE_POSIX_SEM) - sem_t *me_rmutex; /* Shared mutexes are not supported */ - sem_t *me_wmutex; -#endif - void *me_userctx; /**< User-settable context */ - MDB_assert_func *me_assert_func; /**< Callback for assertion failures */ -}; - - /** Nested transaction */ -typedef struct MDB_ntxn { - MDB_txn mnt_txn; /**< the transaction */ - MDB_pgstate mnt_pgstate; /**< parent transaction's saved freestate */ -} MDB_ntxn; - - /** max number of pages to commit in one writev() call */ -#define MDB_COMMIT_PAGES 64 -#if defined(IOV_MAX) && IOV_MAX < MDB_COMMIT_PAGES -#undef MDB_COMMIT_PAGES -#define MDB_COMMIT_PAGES IOV_MAX -#endif - - /** max bytes to write in one call */ -#define MAX_WRITE (0x80000000U >> (sizeof(ssize_t) == 4)) - - /** Check \b txn and \b dbi arguments to a function */ -#define TXN_DBI_EXIST(txn, dbi) \ - ((txn) && (dbi) < (txn)->mt_numdbs && ((txn)->mt_dbflags[dbi] & DB_VALID)) - - /** Check for misused \b dbi handles */ -#define TXN_DBI_CHANGED(txn, dbi) \ - ((txn)->mt_dbiseqs[dbi] != (txn)->mt_env->me_dbiseqs[dbi]) - -static int mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp); -static int mdb_page_new(MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp); -static int mdb_page_touch(MDB_cursor *mc); - -static int mdb_page_get(MDB_txn *txn, pgno_t pgno, MDB_page **mp, int *lvl); -static int mdb_page_search_root(MDB_cursor *mc, - MDB_val *key, int modify); -#define MDB_PS_MODIFY 1 -#define MDB_PS_ROOTONLY 2 -#define MDB_PS_FIRST 4 -#define MDB_PS_LAST 8 -static int mdb_page_search(MDB_cursor *mc, - MDB_val *key, int flags); -static int mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst); - -#define MDB_SPLIT_REPLACE MDB_APPENDDUP /**< newkey is not new */ -static int mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, - pgno_t newpgno, unsigned int nflags); - -static int mdb_env_read_header(MDB_env *env, MDB_meta *meta); -static int mdb_env_pick_meta(const MDB_env *env); -static int mdb_env_write_meta(MDB_txn *txn); -#if !(defined(_WIN32) || defined(MDB_USE_POSIX_SEM)) /* Drop unused excl arg */ -# define mdb_env_close0(env, excl) mdb_env_close1(env) -#endif -static void mdb_env_close0(MDB_env *env, int excl); - -static MDB_node *mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp); -static int mdb_node_add(MDB_cursor *mc, indx_t indx, - MDB_val *key, MDB_val *data, pgno_t pgno, unsigned int flags); -static void mdb_node_del(MDB_cursor *mc, int ksize); -static void mdb_node_shrink(MDB_page *mp, indx_t indx); -static int mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst); -static int mdb_node_read(MDB_txn *txn, MDB_node *leaf, MDB_val *data); -static size_t mdb_leaf_size(MDB_env *env, MDB_val *key, MDB_val *data); -static size_t mdb_branch_size(MDB_env *env, MDB_val *key); - -static int mdb_rebalance(MDB_cursor *mc); -static int mdb_update_key(MDB_cursor *mc, MDB_val *key); - -static void mdb_cursor_pop(MDB_cursor *mc); -static int mdb_cursor_push(MDB_cursor *mc, MDB_page *mp); - -static int mdb_cursor_del0(MDB_cursor *mc); -static int mdb_del0(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data, unsigned flags); -static int mdb_cursor_sibling(MDB_cursor *mc, int move_right); -static int mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op); -static int mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op); -static int mdb_cursor_set(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op, - int *exactp); -static int mdb_cursor_first(MDB_cursor *mc, MDB_val *key, MDB_val *data); -static int mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data); - -static void mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx); -static void mdb_xcursor_init0(MDB_cursor *mc); -static void mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node); - -static int mdb_drop0(MDB_cursor *mc, int subs); -static void mdb_default_cmp(MDB_txn *txn, MDB_dbi dbi); - -/** @cond */ -static MDB_cmp_func mdb_cmp_memn, mdb_cmp_memnr, mdb_cmp_int, mdb_cmp_cint, mdb_cmp_long; -/** @endcond */ - -/** Compare two items pointing at size_t's of unknown alignment. */ -#ifdef MISALIGNED_OK -# define mdb_cmp_clong mdb_cmp_long -#else -# define mdb_cmp_clong mdb_cmp_cint -#endif - -#ifdef _WIN32 -static SECURITY_DESCRIPTOR mdb_null_sd; -static SECURITY_ATTRIBUTES mdb_all_sa; -static int mdb_sec_inited; -#endif - -/** Return the library version info. */ -char * -mdb_version(int *major, int *minor, int *patch) -{ - if (major) *major = MDB_VERSION_MAJOR; - if (minor) *minor = MDB_VERSION_MINOR; - if (patch) *patch = MDB_VERSION_PATCH; - return MDB_VERSION_STRING; -} - -/** Table of descriptions for LMDB @ref errors */ -static char *const mdb_errstr[] = { - "MDB_KEYEXIST: Key/data pair already exists", - "MDB_NOTFOUND: No matching key/data pair found", - "MDB_PAGE_NOTFOUND: Requested page not found", - "MDB_CORRUPTED: Located page was wrong type", - "MDB_PANIC: Update of meta page failed", - "MDB_VERSION_MISMATCH: Database environment version mismatch", - "MDB_INVALID: File is not an LMDB file", - "MDB_MAP_FULL: Environment mapsize limit reached", - "MDB_DBS_FULL: Environment maxdbs limit reached", - "MDB_READERS_FULL: Environment maxreaders limit reached", - "MDB_TLS_FULL: Thread-local storage keys full - too many environments open", - "MDB_TXN_FULL: Transaction has too many dirty pages - transaction too big", - "MDB_CURSOR_FULL: Internal error - cursor stack limit reached", - "MDB_PAGE_FULL: Internal error - page has no more space", - "MDB_MAP_RESIZED: Database contents grew beyond environment mapsize", - "MDB_INCOMPATIBLE: Operation and DB incompatible, or DB flags changed", - "MDB_BAD_RSLOT: Invalid reuse of reader locktable slot", - "MDB_BAD_TXN: Transaction cannot recover - it must be aborted", - "MDB_BAD_VALSIZE: Unsupported size of key/DB name/data, or wrong DUPFIXED size", - "MDB_BAD_DBI: The specified DBI handle was closed/changed unexpectedly", -}; - -char * -mdb_strerror(int err) -{ -#ifdef _WIN32 - /** HACK: pad 4KB on stack over the buf. Return system msgs in buf. - * This works as long as no function between the call to mdb_strerror - * and the actual use of the message uses more than 4K of stack. - */ - char pad[4096]; - char buf[1024], *ptr = buf; -#endif - int i; - if (!err) - return ("Successful return: 0"); - - if (err >= MDB_KEYEXIST && err <= MDB_LAST_ERRCODE) { - i = err - MDB_KEYEXIST; - return mdb_errstr[i]; - } - -#ifdef _WIN32 - /* These are the C-runtime error codes we use. The comment indicates - * their numeric value, and the Win32 error they would correspond to - * if the error actually came from a Win32 API. A major mess, we should - * have used LMDB-specific error codes for everything. - */ - switch(err) { - case ENOENT: /* 2, FILE_NOT_FOUND */ - case EIO: /* 5, ACCESS_DENIED */ - case ENOMEM: /* 12, INVALID_ACCESS */ - case EACCES: /* 13, INVALID_DATA */ - case EBUSY: /* 16, CURRENT_DIRECTORY */ - case EINVAL: /* 22, BAD_COMMAND */ - case ENOSPC: /* 28, OUT_OF_PAPER */ - return strerror(err); - default: - ; - } - buf[0] = 0; - FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | - FORMAT_MESSAGE_IGNORE_INSERTS, - NULL, err, 0, ptr, sizeof(buf), (va_list *)pad); - return ptr; -#else - return strerror(err); -#endif -} - -/** assert(3) variant in cursor context */ -#define mdb_cassert(mc, expr) mdb_assert0((mc)->mc_txn->mt_env, expr, #expr) -/** assert(3) variant in transaction context */ -#define mdb_tassert(mc, expr) mdb_assert0((txn)->mt_env, expr, #expr) -/** assert(3) variant in environment context */ -#define mdb_eassert(env, expr) mdb_assert0(env, expr, #expr) - -#ifndef NDEBUG -# define mdb_assert0(env, expr, expr_txt) ((expr) ? (void)0 : \ - mdb_assert_fail(env, expr_txt, mdb_func_, __FILE__, __LINE__)) - -static void -mdb_assert_fail(MDB_env *env, const char *expr_txt, - const char *func, const char *file, int line) -{ - char buf[400]; - sprintf(buf, "%.100s:%d: Assertion '%.200s' failed in %.40s()", - file, line, expr_txt, func); - if (env->me_assert_func) - env->me_assert_func(env, buf); - fprintf(stderr, "%s\n", buf); - abort(); -} -#else -# define mdb_assert0(env, expr, expr_txt) ((void) 0) -#endif /* NDEBUG */ - -#if MDB_DEBUG -/** Return the page number of \b mp which may be sub-page, for debug output */ -static pgno_t -mdb_dbg_pgno(MDB_page *mp) -{ - pgno_t ret; - COPY_PGNO(ret, mp->mp_pgno); - return ret; -} - -/** Display a key in hexadecimal and return the address of the result. - * @param[in] key the key to display - * @param[in] buf the buffer to write into. Should always be #DKBUF. - * @return The key in hexadecimal form. - */ -char * -mdb_dkey(MDB_val *key, char *buf) -{ - char *ptr = buf; - unsigned char *c = key->mv_data; - unsigned int i; - - if (!key) - return ""; - - if (key->mv_size > DKBUF_MAXKEYSIZE) - return "MDB_MAXKEYSIZE"; - /* may want to make this a dynamic check: if the key is mostly - * printable characters, print it as-is instead of converting to hex. - */ -#if 1 - buf[0] = '\0'; - for (i=0; imv_size; i++) - ptr += sprintf(ptr, "%02x", *c++); -#else - sprintf(buf, "%.*s", key->mv_size, key->mv_data); -#endif - return buf; -} - -static const char * -mdb_leafnode_type(MDB_node *n) -{ - static char *const tp[2][2] = {{"", ": DB"}, {": sub-page", ": sub-DB"}}; - return F_ISSET(n->mn_flags, F_BIGDATA) ? ": overflow page" : - tp[F_ISSET(n->mn_flags, F_DUPDATA)][F_ISSET(n->mn_flags, F_SUBDATA)]; -} - -/** Display all the keys in the page. */ -void -mdb_page_list(MDB_page *mp) -{ - pgno_t pgno = mdb_dbg_pgno(mp); - const char *type, *state = (mp->mp_flags & P_DIRTY) ? ", dirty" : ""; - MDB_node *node; - unsigned int i, nkeys, nsize, total = 0; - MDB_val key; - DKBUF; - - switch (mp->mp_flags & (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP)) { - case P_BRANCH: type = "Branch page"; break; - case P_LEAF: type = "Leaf page"; break; - case P_LEAF|P_SUBP: type = "Sub-page"; break; - case P_LEAF|P_LEAF2: type = "LEAF2 page"; break; - case P_LEAF|P_LEAF2|P_SUBP: type = "LEAF2 sub-page"; break; - case P_OVERFLOW: - fprintf(stderr, "Overflow page %"Z"u pages %u%s\n", - pgno, mp->mp_pages, state); - return; - case P_META: - fprintf(stderr, "Meta-page %"Z"u txnid %"Z"u\n", - pgno, ((MDB_meta *)METADATA(mp))->mm_txnid); - return; - default: - fprintf(stderr, "Bad page %"Z"u flags 0x%u\n", pgno, mp->mp_flags); - return; - } - - nkeys = NUMKEYS(mp); - fprintf(stderr, "%s %"Z"u numkeys %d%s\n", type, pgno, nkeys, state); - - for (i=0; imp_pad; - key.mv_data = LEAF2KEY(mp, i, nsize); - total += nsize; - fprintf(stderr, "key %d: nsize %d, %s\n", i, nsize, DKEY(&key)); - continue; - } - node = NODEPTR(mp, i); - key.mv_size = node->mn_ksize; - key.mv_data = node->mn_data; - nsize = NODESIZE + key.mv_size; - if (IS_BRANCH(mp)) { - fprintf(stderr, "key %d: page %"Z"u, %s\n", i, NODEPGNO(node), - DKEY(&key)); - total += nsize; - } else { - if (F_ISSET(node->mn_flags, F_BIGDATA)) - nsize += sizeof(pgno_t); - else - nsize += NODEDSZ(node); - total += nsize; - nsize += sizeof(indx_t); - fprintf(stderr, "key %d: nsize %d, %s%s\n", - i, nsize, DKEY(&key), mdb_leafnode_type(node)); - } - total = EVEN(total); - } - fprintf(stderr, "Total: header %d + contents %d + unused %d\n", - IS_LEAF2(mp) ? PAGEHDRSZ : PAGEBASE + mp->mp_lower, total, SIZELEFT(mp)); -} - -void -mdb_cursor_chk(MDB_cursor *mc) -{ - unsigned int i; - MDB_node *node; - MDB_page *mp; - - if (!mc->mc_snum && !(mc->mc_flags & C_INITIALIZED)) return; - for (i=0; imc_top; i++) { - mp = mc->mc_pg[i]; - node = NODEPTR(mp, mc->mc_ki[i]); - if (NODEPGNO(node) != mc->mc_pg[i+1]->mp_pgno) - printf("oops!\n"); - } - if (mc->mc_ki[i] >= NUMKEYS(mc->mc_pg[i])) - printf("ack!\n"); -} -#endif - -#if (MDB_DEBUG) > 2 -/** Count all the pages in each DB and in the freelist - * and make sure it matches the actual number of pages - * being used. - * All named DBs must be open for a correct count. - */ -static void mdb_audit(MDB_txn *txn) -{ - MDB_cursor mc; - MDB_val key, data; - MDB_ID freecount, count; - MDB_dbi i; - int rc; - - freecount = 0; - mdb_cursor_init(&mc, txn, FREE_DBI, NULL); - while ((rc = mdb_cursor_get(&mc, &key, &data, MDB_NEXT)) == 0) - freecount += *(MDB_ID *)data.mv_data; - mdb_tassert(txn, rc == MDB_NOTFOUND); - - count = 0; - for (i = 0; imt_numdbs; i++) { - MDB_xcursor mx; - if (!(txn->mt_dbflags[i] & DB_VALID)) - continue; - mdb_cursor_init(&mc, txn, i, &mx); - if (txn->mt_dbs[i].md_root == P_INVALID) - continue; - count += txn->mt_dbs[i].md_branch_pages + - txn->mt_dbs[i].md_leaf_pages + - txn->mt_dbs[i].md_overflow_pages; - if (txn->mt_dbs[i].md_flags & MDB_DUPSORT) { - rc = mdb_page_search(&mc, NULL, MDB_PS_FIRST); - for (; rc == MDB_SUCCESS; rc = mdb_cursor_sibling(&mc, 1)) { - unsigned j; - MDB_page *mp; - mp = mc.mc_pg[mc.mc_top]; - for (j=0; jmn_flags & F_SUBDATA) { - MDB_db db; - memcpy(&db, NODEDATA(leaf), sizeof(db)); - count += db.md_branch_pages + db.md_leaf_pages + - db.md_overflow_pages; - } - } - } - mdb_tassert(txn, rc == MDB_NOTFOUND); - } - } - if (freecount + count + 2 /* metapages */ != txn->mt_next_pgno) { - fprintf(stderr, "audit: %lu freecount: %lu count: %lu total: %lu next_pgno: %lu\n", - txn->mt_txnid, freecount, count+2, freecount+count+2, txn->mt_next_pgno); - } -} -#endif - -int -mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b) -{ - return txn->mt_dbxs[dbi].md_cmp(a, b); -} - -int -mdb_dcmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b) -{ - MDB_cmp_func *dcmp = txn->mt_dbxs[dbi].md_dcmp; -#if UINT_MAX < SIZE_MAX - if (dcmp == mdb_cmp_int && a->mv_size == sizeof(size_t)) - dcmp = mdb_cmp_clong; -#endif - return dcmp(a, b); -} - -/** Allocate memory for a page. - * Re-use old malloc'd pages first for singletons, otherwise just malloc. - */ -static MDB_page * -mdb_page_malloc(MDB_txn *txn, unsigned num) -{ - MDB_env *env = txn->mt_env; - MDB_page *ret = env->me_dpages; - size_t psize = env->me_psize, sz = psize, off; - /* For ! #MDB_NOMEMINIT, psize counts how much to init. - * For a single page alloc, we init everything after the page header. - * For multi-page, we init the final page; if the caller needed that - * many pages they will be filling in at least up to the last page. - */ - if (num == 1) { - if (ret) { - VGMEMP_ALLOC(env, ret, sz); - VGMEMP_DEFINED(ret, sizeof(ret->mp_next)); - env->me_dpages = ret->mp_next; - return ret; - } - psize -= off = PAGEHDRSZ; - } else { - sz *= num; - off = sz - psize; - } - if ((ret = malloc(sz)) != NULL) { - VGMEMP_ALLOC(env, ret, sz); - if (!(env->me_flags & MDB_NOMEMINIT)) { - memset((char *)ret + off, 0, psize); - ret->mp_pad = 0; - } - } else { - txn->mt_flags |= MDB_TXN_ERROR; - } - return ret; -} -/** Free a single page. - * Saves single pages to a list, for future reuse. - * (This is not used for multi-page overflow pages.) - */ -static void -mdb_page_free(MDB_env *env, MDB_page *mp) -{ - mp->mp_next = env->me_dpages; - VGMEMP_FREE(env, mp); - env->me_dpages = mp; -} - -/** Free a dirty page */ -static void -mdb_dpage_free(MDB_env *env, MDB_page *dp) -{ - if (!IS_OVERFLOW(dp) || dp->mp_pages == 1) { - mdb_page_free(env, dp); - } else { - /* large pages just get freed directly */ - VGMEMP_FREE(env, dp); - free(dp); - } -} - -/** Return all dirty pages to dpage list */ -static void -mdb_dlist_free(MDB_txn *txn) -{ - MDB_env *env = txn->mt_env; - MDB_ID2L dl = txn->mt_u.dirty_list; - unsigned i, n = dl[0].mid; - - for (i = 1; i <= n; i++) { - mdb_dpage_free(env, dl[i].mptr); - } - dl[0].mid = 0; -} - -/** Loosen or free a single page. - * Saves single pages to a list for future reuse - * in this same txn. It has been pulled from the freeDB - * and already resides on the dirty list, but has been - * deleted. Use these pages first before pulling again - * from the freeDB. - * - * If the page wasn't dirtied in this txn, just add it - * to this txn's free list. - */ -static int -mdb_page_loose(MDB_cursor *mc, MDB_page *mp) -{ - int loose = 0; - pgno_t pgno = mp->mp_pgno; - MDB_txn *txn = mc->mc_txn; - - if ((mp->mp_flags & P_DIRTY) && mc->mc_dbi != FREE_DBI) { - if (txn->mt_parent) { - MDB_ID2 *dl = txn->mt_u.dirty_list; - /* If txn has a parent, make sure the page is in our - * dirty list. - */ - if (dl[0].mid) { - unsigned x = mdb_mid2l_search(dl, pgno); - if (x <= dl[0].mid && dl[x].mid == pgno) { - if (mp != dl[x].mptr) { /* bad cursor? */ - mc->mc_flags &= ~(C_INITIALIZED|C_EOF); - txn->mt_flags |= MDB_TXN_ERROR; - return MDB_CORRUPTED; - } - /* ok, it's ours */ - loose = 1; - } - } - } else { - /* no parent txn, so it's just ours */ - loose = 1; - } - } - if (loose) { - DPRINTF(("loosen db %d page %"Z"u", DDBI(mc), - mp->mp_pgno)); - NEXT_LOOSE_PAGE(mp) = txn->mt_loose_pgs; - txn->mt_loose_pgs = mp; - txn->mt_loose_count++; - mp->mp_flags |= P_LOOSE; - } else { - int rc = mdb_midl_append(&txn->mt_free_pgs, pgno); - if (rc) - return rc; - } - - return MDB_SUCCESS; -} - -/** Set or clear P_KEEP in dirty, non-overflow, non-sub pages watched by txn. - * @param[in] mc A cursor handle for the current operation. - * @param[in] pflags Flags of the pages to update: - * P_DIRTY to set P_KEEP, P_DIRTY|P_KEEP to clear it. - * @param[in] all No shortcuts. Needed except after a full #mdb_page_flush(). - * @return 0 on success, non-zero on failure. - */ -static int -mdb_pages_xkeep(MDB_cursor *mc, unsigned pflags, int all) -{ - enum { Mask = P_SUBP|P_DIRTY|P_LOOSE|P_KEEP }; - MDB_txn *txn = mc->mc_txn; - MDB_cursor *m3; - MDB_xcursor *mx; - MDB_page *dp, *mp; - MDB_node *leaf; - unsigned i, j; - int rc = MDB_SUCCESS, level; - - /* Mark pages seen by cursors */ - if (mc->mc_flags & C_UNTRACK) - mc = NULL; /* will find mc in mt_cursors */ - for (i = txn->mt_numdbs;; mc = txn->mt_cursors[--i]) { - for (; mc; mc=mc->mc_next) { - if (!(mc->mc_flags & C_INITIALIZED)) - continue; - for (m3 = mc;; m3 = &mx->mx_cursor) { - mp = NULL; - for (j=0; jmc_snum; j++) { - mp = m3->mc_pg[j]; - if ((mp->mp_flags & Mask) == pflags) - mp->mp_flags ^= P_KEEP; - } - mx = m3->mc_xcursor; - /* Proceed to mx if it is at a sub-database */ - if (! (mx && (mx->mx_cursor.mc_flags & C_INITIALIZED))) - break; - if (! (mp && (mp->mp_flags & P_LEAF))) - break; - leaf = NODEPTR(mp, m3->mc_ki[j-1]); - if (!(leaf->mn_flags & F_SUBDATA)) - break; - } - } - if (i == 0) - break; - } - - if (all) { - /* Mark dirty root pages */ - for (i=0; imt_numdbs; i++) { - if (txn->mt_dbflags[i] & DB_DIRTY) { - pgno_t pgno = txn->mt_dbs[i].md_root; - if (pgno == P_INVALID) - continue; - if ((rc = mdb_page_get(txn, pgno, &dp, &level)) != MDB_SUCCESS) - break; - if ((dp->mp_flags & Mask) == pflags && level <= 1) - dp->mp_flags ^= P_KEEP; - } - } - } - - return rc; -} - -static int mdb_page_flush(MDB_txn *txn, int keep); - -/** Spill pages from the dirty list back to disk. - * This is intended to prevent running into #MDB_TXN_FULL situations, - * but note that they may still occur in a few cases: - * 1) our estimate of the txn size could be too small. Currently this - * seems unlikely, except with a large number of #MDB_MULTIPLE items. - * 2) child txns may run out of space if their parents dirtied a - * lot of pages and never spilled them. TODO: we probably should do - * a preemptive spill during #mdb_txn_begin() of a child txn, if - * the parent's dirty_room is below a given threshold. - * - * Otherwise, if not using nested txns, it is expected that apps will - * not run into #MDB_TXN_FULL any more. The pages are flushed to disk - * the same way as for a txn commit, e.g. their P_DIRTY flag is cleared. - * If the txn never references them again, they can be left alone. - * If the txn only reads them, they can be used without any fuss. - * If the txn writes them again, they can be dirtied immediately without - * going thru all of the work of #mdb_page_touch(). Such references are - * handled by #mdb_page_unspill(). - * - * Also note, we never spill DB root pages, nor pages of active cursors, - * because we'll need these back again soon anyway. And in nested txns, - * we can't spill a page in a child txn if it was already spilled in a - * parent txn. That would alter the parent txns' data even though - * the child hasn't committed yet, and we'd have no way to undo it if - * the child aborted. - * - * @param[in] m0 cursor A cursor handle identifying the transaction and - * database for which we are checking space. - * @param[in] key For a put operation, the key being stored. - * @param[in] data For a put operation, the data being stored. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_spill(MDB_cursor *m0, MDB_val *key, MDB_val *data) -{ - MDB_txn *txn = m0->mc_txn; - MDB_page *dp; - MDB_ID2L dl = txn->mt_u.dirty_list; - unsigned int i, j, need; - int rc; - - if (m0->mc_flags & C_SUB) - return MDB_SUCCESS; - - /* Estimate how much space this op will take */ - i = m0->mc_db->md_depth; - /* Named DBs also dirty the main DB */ - if (m0->mc_dbi > MAIN_DBI) - i += txn->mt_dbs[MAIN_DBI].md_depth; - /* For puts, roughly factor in the key+data size */ - if (key) - i += (LEAFSIZE(key, data) + txn->mt_env->me_psize) / txn->mt_env->me_psize; - i += i; /* double it for good measure */ - need = i; - - if (txn->mt_dirty_room > i) - return MDB_SUCCESS; - - if (!txn->mt_spill_pgs) { - txn->mt_spill_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX); - if (!txn->mt_spill_pgs) - return ENOMEM; - } else { - /* purge deleted slots */ - MDB_IDL sl = txn->mt_spill_pgs; - unsigned int num = sl[0]; - j=0; - for (i=1; i<=num; i++) { - if (!(sl[i] & 1)) - sl[++j] = sl[i]; - } - sl[0] = j; - } - - /* Preserve pages which may soon be dirtied again */ - if ((rc = mdb_pages_xkeep(m0, P_DIRTY, 1)) != MDB_SUCCESS) - goto done; - - /* Less aggressive spill - we originally spilled the entire dirty list, - * with a few exceptions for cursor pages and DB root pages. But this - * turns out to be a lot of wasted effort because in a large txn many - * of those pages will need to be used again. So now we spill only 1/8th - * of the dirty pages. Testing revealed this to be a good tradeoff, - * better than 1/2, 1/4, or 1/10. - */ - if (need < MDB_IDL_UM_MAX / 8) - need = MDB_IDL_UM_MAX / 8; - - /* Save the page IDs of all the pages we're flushing */ - /* flush from the tail forward, this saves a lot of shifting later on. */ - for (i=dl[0].mid; i && need; i--) { - MDB_ID pn = dl[i].mid << 1; - dp = dl[i].mptr; - if (dp->mp_flags & (P_LOOSE|P_KEEP)) - continue; - /* Can't spill twice, make sure it's not already in a parent's - * spill list. - */ - if (txn->mt_parent) { - MDB_txn *tx2; - for (tx2 = txn->mt_parent; tx2; tx2 = tx2->mt_parent) { - if (tx2->mt_spill_pgs) { - j = mdb_midl_search(tx2->mt_spill_pgs, pn); - if (j <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[j] == pn) { - dp->mp_flags |= P_KEEP; - break; - } - } - } - if (tx2) - continue; - } - if ((rc = mdb_midl_append(&txn->mt_spill_pgs, pn))) - goto done; - need--; - } - mdb_midl_sort(txn->mt_spill_pgs); - - /* Flush the spilled part of dirty list */ - if ((rc = mdb_page_flush(txn, i)) != MDB_SUCCESS) - goto done; - - /* Reset any dirty pages we kept that page_flush didn't see */ - rc = mdb_pages_xkeep(m0, P_DIRTY|P_KEEP, i); - -done: - txn->mt_flags |= rc ? MDB_TXN_ERROR : MDB_TXN_SPILLS; - return rc; -} - -/** Find oldest txnid still referenced. Expects txn->mt_txnid > 0. */ -static txnid_t -mdb_find_oldest(MDB_txn *txn) -{ - int i; - txnid_t mr, oldest = txn->mt_txnid - 1; - if (txn->mt_env->me_txns) { - MDB_reader *r = txn->mt_env->me_txns->mti_readers; - for (i = txn->mt_env->me_txns->mti_numreaders; --i >= 0; ) { - if (r[i].mr_pid) { - mr = r[i].mr_txnid; - if (oldest > mr) - oldest = mr; - } - } - } - return oldest; -} - -/** Add a page to the txn's dirty list */ -static void -mdb_page_dirty(MDB_txn *txn, MDB_page *mp) -{ - MDB_ID2 mid; - int rc, (*insert)(MDB_ID2L, MDB_ID2 *); - - if (txn->mt_env->me_flags & MDB_WRITEMAP) { - insert = mdb_mid2l_append; - } else { - insert = mdb_mid2l_insert; - } - mid.mid = mp->mp_pgno; - mid.mptr = mp; - rc = insert(txn->mt_u.dirty_list, &mid); - mdb_tassert(txn, rc == 0); - txn->mt_dirty_room--; -} - -/** Allocate page numbers and memory for writing. Maintain me_pglast, - * me_pghead and mt_next_pgno. - * - * If there are free pages available from older transactions, they - * are re-used first. Otherwise allocate a new page at mt_next_pgno. - * Do not modify the freedB, just merge freeDB records into me_pghead[] - * and move me_pglast to say which records were consumed. Only this - * function can create me_pghead and move me_pglast/mt_next_pgno. - * @param[in] mc cursor A cursor handle identifying the transaction and - * database for which we are allocating. - * @param[in] num the number of pages to allocate. - * @param[out] mp Address of the allocated page(s). Requests for multiple pages - * will always be satisfied by a single contiguous chunk of memory. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp) -{ -#ifdef MDB_PARANOID /* Seems like we can ignore this now */ - /* Get at most more freeDB records once me_pghead - * has enough pages. If not enough, use new pages from the map. - * If and mc is updating the freeDB, only get new - * records if me_pghead is empty. Then the freelist cannot play - * catch-up with itself by growing while trying to save it. - */ - enum { Paranoid = 1, Max_retries = 500 }; -#else - enum { Paranoid = 0, Max_retries = INT_MAX /*infinite*/ }; -#endif - int rc, retry = num * 60; - MDB_txn *txn = mc->mc_txn; - MDB_env *env = txn->mt_env; - pgno_t pgno, *mop = env->me_pghead; - unsigned i, j, mop_len = mop ? mop[0] : 0, n2 = num-1; - MDB_page *np; - txnid_t oldest = 0, last; - MDB_cursor_op op; - MDB_cursor m2; - int found_old = 0; - - /* If there are any loose pages, just use them */ - if (num == 1 && txn->mt_loose_pgs) { - np = txn->mt_loose_pgs; - txn->mt_loose_pgs = NEXT_LOOSE_PAGE(np); - txn->mt_loose_count--; - DPRINTF(("db %d use loose page %"Z"u", DDBI(mc), - np->mp_pgno)); - *mp = np; - return MDB_SUCCESS; - } - - *mp = NULL; - - /* If our dirty list is already full, we can't do anything */ - if (txn->mt_dirty_room == 0) { - rc = MDB_TXN_FULL; - goto fail; - } - - for (op = MDB_FIRST;; op = MDB_NEXT) { - MDB_val key, data; - MDB_node *leaf; - pgno_t *idl; - - /* Seek a big enough contiguous page range. Prefer - * pages at the tail, just truncating the list. - */ - if (mop_len > n2) { - i = mop_len; - do { - pgno = mop[i]; - if (mop[i-n2] == pgno+n2) - goto search_done; - } while (--i > n2); - if (--retry < 0) - break; - } - - if (op == MDB_FIRST) { /* 1st iteration */ - /* Prepare to fetch more and coalesce */ - last = env->me_pglast; - oldest = env->me_pgoldest; - mdb_cursor_init(&m2, txn, FREE_DBI, NULL); - if (last) { - op = MDB_SET_RANGE; - key.mv_data = &last; /* will look up last+1 */ - key.mv_size = sizeof(last); - } - if (Paranoid && mc->mc_dbi == FREE_DBI) - retry = -1; - } - if (Paranoid && retry < 0 && mop_len) - break; - - last++; - /* Do not fetch more if the record will be too recent */ - if (oldest <= last) { - if (!found_old) { - oldest = mdb_find_oldest(txn); - env->me_pgoldest = oldest; - found_old = 1; - } - if (oldest <= last) - break; - } - rc = mdb_cursor_get(&m2, &key, NULL, op); - if (rc) { - if (rc == MDB_NOTFOUND) - break; - goto fail; - } - last = *(txnid_t*)key.mv_data; - if (oldest <= last) { - if (!found_old) { - oldest = mdb_find_oldest(txn); - env->me_pgoldest = oldest; - found_old = 1; - } - if (oldest <= last) - break; - } - np = m2.mc_pg[m2.mc_top]; - leaf = NODEPTR(np, m2.mc_ki[m2.mc_top]); - if ((rc = mdb_node_read(txn, leaf, &data)) != MDB_SUCCESS) - return rc; - - idl = (MDB_ID *) data.mv_data; - i = idl[0]; - if (!mop) { - if (!(env->me_pghead = mop = mdb_midl_alloc(i))) { - rc = ENOMEM; - goto fail; - } - } else { - if ((rc = mdb_midl_need(&env->me_pghead, i)) != 0) - goto fail; - mop = env->me_pghead; - } - env->me_pglast = last; -#if (MDB_DEBUG) > 1 - DPRINTF(("IDL read txn %"Z"u root %"Z"u num %u", - last, txn->mt_dbs[FREE_DBI].md_root, i)); - for (j = i; j; j--) - DPRINTF(("IDL %"Z"u", idl[j])); -#endif - /* Merge in descending sorted order */ - mdb_midl_xmerge(mop, idl); - mop_len = mop[0]; - } - - /* Use new pages from the map when nothing suitable in the freeDB */ - i = 0; - pgno = txn->mt_next_pgno; - if (pgno + num >= env->me_maxpg) { - DPUTS("DB size maxed out"); - rc = MDB_MAP_FULL; - goto fail; - } - -search_done: - if (env->me_flags & MDB_WRITEMAP) { - np = (MDB_page *)(env->me_map + env->me_psize * pgno); - } else { - if (!(np = mdb_page_malloc(txn, num))) { - rc = ENOMEM; - goto fail; - } - } - if (i) { - mop[0] = mop_len -= num; - /* Move any stragglers down */ - for (j = i-num; j < mop_len; ) - mop[++j] = mop[++i]; - } else { - txn->mt_next_pgno = pgno + num; - } - np->mp_pgno = pgno; - mdb_page_dirty(txn, np); - *mp = np; - - return MDB_SUCCESS; - -fail: - txn->mt_flags |= MDB_TXN_ERROR; - return rc; -} - -/** Copy the used portions of a non-overflow page. - * @param[in] dst page to copy into - * @param[in] src page to copy from - * @param[in] psize size of a page - */ -static void -mdb_page_copy(MDB_page *dst, MDB_page *src, unsigned int psize) -{ - enum { Align = sizeof(pgno_t) }; - indx_t upper = src->mp_upper, lower = src->mp_lower, unused = upper-lower; - - /* If page isn't full, just copy the used portion. Adjust - * alignment so memcpy may copy words instead of bytes. - */ - if ((unused &= -Align) && !IS_LEAF2(src)) { - upper = (upper + PAGEBASE) & -Align; - memcpy(dst, src, (lower + PAGEBASE + (Align-1)) & -Align); - memcpy((pgno_t *)((char *)dst+upper), (pgno_t *)((char *)src+upper), - psize - upper); - } else { - memcpy(dst, src, psize - unused); - } -} - -/** Pull a page off the txn's spill list, if present. - * If a page being referenced was spilled to disk in this txn, bring - * it back and make it dirty/writable again. - * @param[in] txn the transaction handle. - * @param[in] mp the page being referenced. It must not be dirty. - * @param[out] ret the writable page, if any. ret is unchanged if - * mp wasn't spilled. - */ -static int -mdb_page_unspill(MDB_txn *txn, MDB_page *mp, MDB_page **ret) -{ - MDB_env *env = txn->mt_env; - const MDB_txn *tx2; - unsigned x; - pgno_t pgno = mp->mp_pgno, pn = pgno << 1; - - for (tx2 = txn; tx2; tx2=tx2->mt_parent) { - if (!tx2->mt_spill_pgs) - continue; - x = mdb_midl_search(tx2->mt_spill_pgs, pn); - if (x <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[x] == pn) { - MDB_page *np; - int num; - if (txn->mt_dirty_room == 0) - return MDB_TXN_FULL; - if (IS_OVERFLOW(mp)) - num = mp->mp_pages; - else - num = 1; - if (env->me_flags & MDB_WRITEMAP) { - np = mp; - } else { - np = mdb_page_malloc(txn, num); - if (!np) - return ENOMEM; - if (num > 1) - memcpy(np, mp, num * env->me_psize); - else - mdb_page_copy(np, mp, env->me_psize); - } - if (tx2 == txn) { - /* If in current txn, this page is no longer spilled. - * If it happens to be the last page, truncate the spill list. - * Otherwise mark it as deleted by setting the LSB. - */ - if (x == txn->mt_spill_pgs[0]) - txn->mt_spill_pgs[0]--; - else - txn->mt_spill_pgs[x] |= 1; - } /* otherwise, if belonging to a parent txn, the - * page remains spilled until child commits - */ - - mdb_page_dirty(txn, np); - np->mp_flags |= P_DIRTY; - *ret = np; - break; - } - } - return MDB_SUCCESS; -} - -/** Touch a page: make it dirty and re-insert into tree with updated pgno. - * @param[in] mc cursor pointing to the page to be touched - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_touch(MDB_cursor *mc) -{ - MDB_page *mp = mc->mc_pg[mc->mc_top], *np; - MDB_txn *txn = mc->mc_txn; - MDB_cursor *m2, *m3; - pgno_t pgno; - int rc; - - if (!F_ISSET(mp->mp_flags, P_DIRTY)) { - if (txn->mt_flags & MDB_TXN_SPILLS) { - np = NULL; - rc = mdb_page_unspill(txn, mp, &np); - if (rc) - goto fail; - if (np) - goto done; - } - if ((rc = mdb_midl_need(&txn->mt_free_pgs, 1)) || - (rc = mdb_page_alloc(mc, 1, &np))) - goto fail; - pgno = np->mp_pgno; - DPRINTF(("touched db %d page %"Z"u -> %"Z"u", DDBI(mc), - mp->mp_pgno, pgno)); - mdb_cassert(mc, mp->mp_pgno != pgno); - mdb_midl_xappend(txn->mt_free_pgs, mp->mp_pgno); - /* Update the parent page, if any, to point to the new page */ - if (mc->mc_top) { - MDB_page *parent = mc->mc_pg[mc->mc_top-1]; - MDB_node *node = NODEPTR(parent, mc->mc_ki[mc->mc_top-1]); - SETPGNO(node, pgno); - } else { - mc->mc_db->md_root = pgno; - } - } else if (txn->mt_parent && !IS_SUBP(mp)) { - MDB_ID2 mid, *dl = txn->mt_u.dirty_list; - pgno = mp->mp_pgno; - /* If txn has a parent, make sure the page is in our - * dirty list. - */ - if (dl[0].mid) { - unsigned x = mdb_mid2l_search(dl, pgno); - if (x <= dl[0].mid && dl[x].mid == pgno) { - if (mp != dl[x].mptr) { /* bad cursor? */ - mc->mc_flags &= ~(C_INITIALIZED|C_EOF); - txn->mt_flags |= MDB_TXN_ERROR; - return MDB_CORRUPTED; - } - return 0; - } - } - mdb_cassert(mc, dl[0].mid < MDB_IDL_UM_MAX); - /* No - copy it */ - np = mdb_page_malloc(txn, 1); - if (!np) - return ENOMEM; - mid.mid = pgno; - mid.mptr = np; - rc = mdb_mid2l_insert(dl, &mid); - mdb_cassert(mc, rc == 0); - } else { - return 0; - } - - mdb_page_copy(np, mp, txn->mt_env->me_psize); - np->mp_pgno = pgno; - np->mp_flags |= P_DIRTY; - -done: - /* Adjust cursors pointing to mp */ - mc->mc_pg[mc->mc_top] = np; - m2 = txn->mt_cursors[mc->mc_dbi]; - if (mc->mc_flags & C_SUB) { - for (; m2; m2=m2->mc_next) { - m3 = &m2->mc_xcursor->mx_cursor; - if (m3->mc_snum < mc->mc_snum) continue; - if (m3->mc_pg[mc->mc_top] == mp) - m3->mc_pg[mc->mc_top] = np; - } - } else { - for (; m2; m2=m2->mc_next) { - if (m2->mc_snum < mc->mc_snum) continue; - if (m2->mc_pg[mc->mc_top] == mp) { - m2->mc_pg[mc->mc_top] = np; - if ((mc->mc_db->md_flags & MDB_DUPSORT) && - IS_LEAF(np) && - m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top]) - { - MDB_node *leaf = NODEPTR(np, mc->mc_ki[mc->mc_top]); - if (!(leaf->mn_flags & F_SUBDATA)) - m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); - } - } - } - } - return 0; - -fail: - txn->mt_flags |= MDB_TXN_ERROR; - return rc; -} - -int -mdb_env_sync(MDB_env *env, int force) -{ - int rc = 0; - if (env->me_flags & MDB_RDONLY) - return EACCES; - if (force || !F_ISSET(env->me_flags, MDB_NOSYNC)) { - if (env->me_flags & MDB_WRITEMAP) { - int flags = ((env->me_flags & MDB_MAPASYNC) && !force) - ? MS_ASYNC : MS_SYNC; - if (MDB_MSYNC(env->me_map, env->me_mapsize, flags)) - rc = ErrCode(); -#ifdef _WIN32 - else if (flags == MS_SYNC && MDB_FDATASYNC(env->me_fd)) - rc = ErrCode(); -#endif - } else { -#ifdef BROKEN_FDATASYNC - if (env->me_flags & MDB_FSYNCONLY) { - if (fsync(env->me_fd)) - rc = ErrCode(); - } else -#endif - if (MDB_FDATASYNC(env->me_fd)) - rc = ErrCode(); - } - } - return rc; -} - -/** Back up parent txn's cursors, then grab the originals for tracking */ -static int -mdb_cursor_shadow(MDB_txn *src, MDB_txn *dst) -{ - MDB_cursor *mc, *bk; - MDB_xcursor *mx; - size_t size; - int i; - - for (i = src->mt_numdbs; --i >= 0; ) { - if ((mc = src->mt_cursors[i]) != NULL) { - size = sizeof(MDB_cursor); - if (mc->mc_xcursor) - size += sizeof(MDB_xcursor); - for (; mc; mc = bk->mc_next) { - bk = malloc(size); - if (!bk) - return ENOMEM; - *bk = *mc; - mc->mc_backup = bk; - mc->mc_db = &dst->mt_dbs[i]; - /* Kill pointers into src - and dst to reduce abuse: The - * user may not use mc until dst ends. Otherwise we'd... - */ - mc->mc_txn = NULL; /* ...set this to dst */ - mc->mc_dbflag = NULL; /* ...and &dst->mt_dbflags[i] */ - if ((mx = mc->mc_xcursor) != NULL) { - *(MDB_xcursor *)(bk+1) = *mx; - mx->mx_cursor.mc_txn = NULL; /* ...and dst. */ - } - mc->mc_next = dst->mt_cursors[i]; - dst->mt_cursors[i] = mc; - } - } - } - return MDB_SUCCESS; -} - -/** Close this write txn's cursors, give parent txn's cursors back to parent. - * @param[in] txn the transaction handle. - * @param[in] merge true to keep changes to parent cursors, false to revert. - * @return 0 on success, non-zero on failure. - */ -static void -mdb_cursors_close(MDB_txn *txn, unsigned merge) -{ - MDB_cursor **cursors = txn->mt_cursors, *mc, *next, *bk; - MDB_xcursor *mx; - int i; - - for (i = txn->mt_numdbs; --i >= 0; ) { - for (mc = cursors[i]; mc; mc = next) { - next = mc->mc_next; - if ((bk = mc->mc_backup) != NULL) { - if (merge) { - /* Commit changes to parent txn */ - mc->mc_next = bk->mc_next; - mc->mc_backup = bk->mc_backup; - mc->mc_txn = bk->mc_txn; - mc->mc_db = bk->mc_db; - mc->mc_dbflag = bk->mc_dbflag; - if ((mx = mc->mc_xcursor) != NULL) - mx->mx_cursor.mc_txn = bk->mc_txn; - } else { - /* Abort nested txn */ - *mc = *bk; - if ((mx = mc->mc_xcursor) != NULL) - *mx = *(MDB_xcursor *)(bk+1); - } - mc = bk; - } - /* Only malloced cursors are permanently tracked. */ - free(mc); - } - cursors[i] = NULL; - } -} - -#if !(MDB_DEBUG) -#define mdb_txn_reset0(txn, act) mdb_txn_reset0(txn) -#endif -static void -mdb_txn_reset0(MDB_txn *txn, const char *act); - -#if !(MDB_PIDLOCK) /* Currently the same as defined(_WIN32) */ -enum Pidlock_op { - Pidset, Pidcheck -}; -#else -enum Pidlock_op { - Pidset = F_SETLK, Pidcheck = F_GETLK -}; -#endif - -/** Set or check a pid lock. Set returns 0 on success. - * Check returns 0 if the process is certainly dead, nonzero if it may - * be alive (the lock exists or an error happened so we do not know). - * - * On Windows Pidset is a no-op, we merely check for the existence - * of the process with the given pid. On POSIX we use a single byte - * lock on the lockfile, set at an offset equal to the pid. - */ -static int -mdb_reader_pid(MDB_env *env, enum Pidlock_op op, MDB_PID_T pid) -{ -#if !(MDB_PIDLOCK) /* Currently the same as defined(_WIN32) */ - int ret = 0; - HANDLE h; - if (op == Pidcheck) { - h = OpenProcess(env->me_pidquery, FALSE, pid); - /* No documented "no such process" code, but other program use this: */ - if (!h) - return ErrCode() != ERROR_INVALID_PARAMETER; - /* A process exists until all handles to it close. Has it exited? */ - ret = WaitForSingleObject(h, 0) != 0; - CloseHandle(h); - } - return ret; -#else - for (;;) { - int rc; - struct flock lock_info; - memset(&lock_info, 0, sizeof(lock_info)); - lock_info.l_type = F_WRLCK; - lock_info.l_whence = SEEK_SET; - lock_info.l_start = pid; - lock_info.l_len = 1; - if ((rc = fcntl(env->me_lfd, op, &lock_info)) == 0) { - if (op == F_GETLK && lock_info.l_type != F_UNLCK) - rc = -1; - } else if ((rc = ErrCode()) == EINTR) { - continue; - } - return rc; - } -#endif -} - -/** Common code for #mdb_txn_begin() and #mdb_txn_renew(). - * @param[in] txn the transaction handle to initialize - * @return 0 on success, non-zero on failure. - */ -static int -mdb_txn_renew0(MDB_txn *txn) -{ - MDB_env *env = txn->mt_env; - MDB_txninfo *ti = env->me_txns; - MDB_meta *meta; - unsigned int i, nr, flags = txn->mt_flags; - uint16_t x; - int rc, new_notls = 0; - - if ((flags &= MDB_TXN_RDONLY) != 0) { - if (!ti) { - meta = env->me_metas[ mdb_env_pick_meta(env) ]; - txn->mt_txnid = meta->mm_txnid; - txn->mt_u.reader = NULL; - } else { - MDB_reader *r = (env->me_flags & MDB_NOTLS) ? txn->mt_u.reader : - pthread_getspecific(env->me_txkey); - if (r) { - if (r->mr_pid != env->me_pid || r->mr_txnid != (txnid_t)-1) - return MDB_BAD_RSLOT; - } else { - MDB_PID_T pid = env->me_pid; - MDB_THR_T tid = pthread_self(); - - if (!env->me_live_reader) { - rc = mdb_reader_pid(env, Pidset, pid); - if (rc) - return rc; - env->me_live_reader = 1; - } - - LOCK_MUTEX_R(env); - nr = ti->mti_numreaders; - for (i=0; imti_readers[i].mr_pid == 0) - break; - if (i == env->me_maxreaders) { - UNLOCK_MUTEX_R(env); - return MDB_READERS_FULL; - } - ti->mti_readers[i].mr_pid = pid; - ti->mti_readers[i].mr_tid = tid; - if (i == nr) - ti->mti_numreaders = ++nr; - /* Save numreaders for un-mutexed mdb_env_close() */ - env->me_numreaders = nr; - UNLOCK_MUTEX_R(env); - - r = &ti->mti_readers[i]; - new_notls = (env->me_flags & MDB_NOTLS); - if (!new_notls && (rc=pthread_setspecific(env->me_txkey, r))) { - r->mr_pid = 0; - return rc; - } - } - do /* LY: Retry on a race, ITS#7970. */ - r->mr_txnid = ti->mti_txnid; - while(r->mr_txnid != ti->mti_txnid); - txn->mt_txnid = r->mr_txnid; - txn->mt_u.reader = r; - meta = env->me_metas[txn->mt_txnid & 1]; - } - txn->mt_dbxs = env->me_dbxs; /* mostly static anyway */ - } else { - if (ti) { - LOCK_MUTEX_W(env); - - txn->mt_txnid = ti->mti_txnid; - meta = env->me_metas[txn->mt_txnid & 1]; - } else { - meta = env->me_metas[ mdb_env_pick_meta(env) ]; - txn->mt_txnid = meta->mm_txnid; - } - txn->mt_txnid++; -#if MDB_DEBUG - if (txn->mt_txnid == mdb_debug_start) - mdb_debug = 1; -#endif - txn->mt_child = NULL; - txn->mt_loose_pgs = NULL; - txn->mt_loose_count = 0; - txn->mt_dirty_room = MDB_IDL_UM_MAX; - txn->mt_u.dirty_list = env->me_dirty_list; - txn->mt_u.dirty_list[0].mid = 0; - txn->mt_free_pgs = env->me_free_pgs; - txn->mt_free_pgs[0] = 0; - txn->mt_spill_pgs = NULL; - env->me_txn = txn; - memcpy(txn->mt_dbiseqs, env->me_dbiseqs, env->me_maxdbs * sizeof(unsigned int)); - } - - /* Copy the DB info and flags */ - memcpy(txn->mt_dbs, meta->mm_dbs, 2 * sizeof(MDB_db)); - - /* Moved to here to avoid a data race in read TXNs */ - txn->mt_next_pgno = meta->mm_last_pg+1; - - txn->mt_flags = flags; - - /* Setup db info */ - txn->mt_numdbs = env->me_numdbs; - for (i=2; imt_numdbs; i++) { - x = env->me_dbflags[i]; - txn->mt_dbs[i].md_flags = x & PERSISTENT_FLAGS; - txn->mt_dbflags[i] = (x & MDB_VALID) ? DB_VALID|DB_STALE : 0; - } - txn->mt_dbflags[0] = txn->mt_dbflags[1] = DB_VALID; - - if (env->me_maxpg < txn->mt_next_pgno) { - mdb_txn_reset0(txn, "renew0-mapfail"); - if (new_notls) { - txn->mt_u.reader->mr_pid = 0; - txn->mt_u.reader = NULL; - } - return MDB_MAP_RESIZED; - } - - return MDB_SUCCESS; -} - -int -mdb_txn_renew(MDB_txn *txn) -{ - int rc; - - if (!txn || txn->mt_dbxs) /* A reset txn has mt_dbxs==NULL */ - return EINVAL; - - if (txn->mt_env->me_flags & MDB_FATAL_ERROR) { - DPUTS("environment had fatal error, must shutdown!"); - return MDB_PANIC; - } - - rc = mdb_txn_renew0(txn); - if (rc == MDB_SUCCESS) { - DPRINTF(("renew txn %"Z"u%c %p on mdbenv %p, root page %"Z"u", - txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', - (void *)txn, (void *)txn->mt_env, txn->mt_dbs[MAIN_DBI].md_root)); - } - return rc; -} - -int -mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret) -{ - MDB_txn *txn; - MDB_ntxn *ntxn; - int rc, size, tsize = sizeof(MDB_txn); - - if (env->me_flags & MDB_FATAL_ERROR) { - DPUTS("environment had fatal error, must shutdown!"); - return MDB_PANIC; - } - if ((env->me_flags & MDB_RDONLY) && !(flags & MDB_RDONLY)) - return EACCES; - if (parent) { - /* Nested transactions: Max 1 child, write txns only, no writemap */ - if (parent->mt_child || - (flags & MDB_RDONLY) || - (parent->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) || - (env->me_flags & MDB_WRITEMAP)) - { - return (parent->mt_flags & MDB_TXN_RDONLY) ? EINVAL : MDB_BAD_TXN; - } - tsize = sizeof(MDB_ntxn); - } - size = tsize; - if (!(flags & MDB_RDONLY)) { - if (!parent) { - txn = env->me_txn0; /* just reuse preallocated write txn */ - goto ok; - } - /* child txns use own copy of cursors */ - size += env->me_maxdbs * sizeof(MDB_cursor *); - } - size += env->me_maxdbs * (sizeof(MDB_db)+1); - - if ((txn = calloc(1, size)) == NULL) { - DPRINTF(("calloc: %s", strerror(errno))); - return ENOMEM; - } - txn->mt_dbs = (MDB_db *) ((char *)txn + tsize); - if (flags & MDB_RDONLY) { - txn->mt_flags |= MDB_TXN_RDONLY; - txn->mt_dbflags = (unsigned char *)(txn->mt_dbs + env->me_maxdbs); - txn->mt_dbiseqs = env->me_dbiseqs; - } else { - txn->mt_cursors = (MDB_cursor **)(txn->mt_dbs + env->me_maxdbs); - if (parent) { - txn->mt_dbiseqs = parent->mt_dbiseqs; - txn->mt_dbflags = (unsigned char *)(txn->mt_cursors + env->me_maxdbs); - } else { - txn->mt_dbiseqs = (unsigned int *)(txn->mt_cursors + env->me_maxdbs); - txn->mt_dbflags = (unsigned char *)(txn->mt_dbiseqs + env->me_maxdbs); - } - } - txn->mt_env = env; - -ok: - if (parent) { - unsigned int i; - txn->mt_u.dirty_list = malloc(sizeof(MDB_ID2)*MDB_IDL_UM_SIZE); - if (!txn->mt_u.dirty_list || - !(txn->mt_free_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX))) - { - free(txn->mt_u.dirty_list); - free(txn); - return ENOMEM; - } - txn->mt_txnid = parent->mt_txnid; - txn->mt_dirty_room = parent->mt_dirty_room; - txn->mt_u.dirty_list[0].mid = 0; - txn->mt_spill_pgs = NULL; - txn->mt_next_pgno = parent->mt_next_pgno; - parent->mt_child = txn; - txn->mt_parent = parent; - txn->mt_numdbs = parent->mt_numdbs; - txn->mt_flags = parent->mt_flags; - txn->mt_dbxs = parent->mt_dbxs; - memcpy(txn->mt_dbs, parent->mt_dbs, txn->mt_numdbs * sizeof(MDB_db)); - /* Copy parent's mt_dbflags, but clear DB_NEW */ - for (i=0; imt_numdbs; i++) - txn->mt_dbflags[i] = parent->mt_dbflags[i] & ~DB_NEW; - rc = 0; - ntxn = (MDB_ntxn *)txn; - ntxn->mnt_pgstate = env->me_pgstate; /* save parent me_pghead & co */ - if (env->me_pghead) { - size = MDB_IDL_SIZEOF(env->me_pghead); - env->me_pghead = mdb_midl_alloc(env->me_pghead[0]); - if (env->me_pghead) - memcpy(env->me_pghead, ntxn->mnt_pgstate.mf_pghead, size); - else - rc = ENOMEM; - } - if (!rc) - rc = mdb_cursor_shadow(parent, txn); - if (rc) - mdb_txn_reset0(txn, "beginchild-fail"); - } else { - rc = mdb_txn_renew0(txn); - } - if (rc) { - if (txn != env->me_txn0) - free(txn); - } else { - *ret = txn; - DPRINTF(("begin txn %"Z"u%c %p on mdbenv %p, root page %"Z"u", - txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', - (void *) txn, (void *) env, txn->mt_dbs[MAIN_DBI].md_root)); - } - - return rc; -} - -MDB_env * -mdb_txn_env(MDB_txn *txn) -{ - if(!txn) return NULL; - return txn->mt_env; -} - -/** Export or close DBI handles opened in this txn. */ -static void -mdb_dbis_update(MDB_txn *txn, int keep) -{ - int i; - MDB_dbi n = txn->mt_numdbs; - MDB_env *env = txn->mt_env; - unsigned char *tdbflags = txn->mt_dbflags; - - for (i = n; --i >= 2;) { - if (tdbflags[i] & DB_NEW) { - if (keep) { - env->me_dbflags[i] = txn->mt_dbs[i].md_flags | MDB_VALID; - } else { - char *ptr = env->me_dbxs[i].md_name.mv_data; - if (ptr) { - env->me_dbxs[i].md_name.mv_data = NULL; - env->me_dbxs[i].md_name.mv_size = 0; - env->me_dbflags[i] = 0; - env->me_dbiseqs[i]++; - free(ptr); - } - } - } - } - if (keep && env->me_numdbs < n) - env->me_numdbs = n; -} - -/** Common code for #mdb_txn_reset() and #mdb_txn_abort(). - * May be called twice for readonly txns: First reset it, then abort. - * @param[in] txn the transaction handle to reset - * @param[in] act why the transaction is being reset - */ -static void -mdb_txn_reset0(MDB_txn *txn, const char *act) -{ - MDB_env *env = txn->mt_env; - - /* Close any DBI handles opened in this txn */ - mdb_dbis_update(txn, 0); - - DPRINTF(("%s txn %"Z"u%c %p on mdbenv %p, root page %"Z"u", - act, txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w', - (void *) txn, (void *)env, txn->mt_dbs[MAIN_DBI].md_root)); - - if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) { - if (txn->mt_u.reader) { - txn->mt_u.reader->mr_txnid = (txnid_t)-1; - if (!(env->me_flags & MDB_NOTLS)) - txn->mt_u.reader = NULL; /* txn does not own reader */ - } - txn->mt_numdbs = 0; /* close nothing if called again */ - txn->mt_dbxs = NULL; /* mark txn as reset */ - } else { - pgno_t *pghead = env->me_pghead; - - mdb_cursors_close(txn, 0); - if (!(env->me_flags & MDB_WRITEMAP)) { - mdb_dlist_free(txn); - } - - if (!txn->mt_parent) { - if (mdb_midl_shrink(&txn->mt_free_pgs)) - env->me_free_pgs = txn->mt_free_pgs; - /* me_pgstate: */ - env->me_pghead = NULL; - env->me_pglast = 0; - - env->me_txn = NULL; - /* The writer mutex was locked in mdb_txn_begin. */ - if (env->me_txns) - UNLOCK_MUTEX_W(env); - } else { - txn->mt_parent->mt_child = NULL; - env->me_pgstate = ((MDB_ntxn *)txn)->mnt_pgstate; - mdb_midl_free(txn->mt_free_pgs); - mdb_midl_free(txn->mt_spill_pgs); - free(txn->mt_u.dirty_list); - } - - mdb_midl_free(pghead); - } -} - -void -mdb_txn_reset(MDB_txn *txn) -{ - if (txn == NULL) - return; - - /* This call is only valid for read-only txns */ - if (!(txn->mt_flags & MDB_TXN_RDONLY)) - return; - - mdb_txn_reset0(txn, "reset"); -} - -void -mdb_txn_abort(MDB_txn *txn) -{ - if (txn == NULL) - return; - - if (txn->mt_child) - mdb_txn_abort(txn->mt_child); - - mdb_txn_reset0(txn, "abort"); - /* Free reader slot tied to this txn (if MDB_NOTLS && writable FS) */ - if ((txn->mt_flags & MDB_TXN_RDONLY) && txn->mt_u.reader) - txn->mt_u.reader->mr_pid = 0; - - if (txn != txn->mt_env->me_txn0) - free(txn); -} - -/** Save the freelist as of this transaction to the freeDB. - * This changes the freelist. Keep trying until it stabilizes. - */ -static int -mdb_freelist_save(MDB_txn *txn) -{ - /* env->me_pghead[] can grow and shrink during this call. - * env->me_pglast and txn->mt_free_pgs[] can only grow. - * Page numbers cannot disappear from txn->mt_free_pgs[]. - */ - MDB_cursor mc; - MDB_env *env = txn->mt_env; - int rc, maxfree_1pg = env->me_maxfree_1pg, more = 1; - txnid_t pglast = 0, head_id = 0; - pgno_t freecnt = 0, *free_pgs, *mop; - ssize_t head_room = 0, total_room = 0, mop_len, clean_limit; - - mdb_cursor_init(&mc, txn, FREE_DBI, NULL); - - if (env->me_pghead) { - /* Make sure first page of freeDB is touched and on freelist */ - rc = mdb_page_search(&mc, NULL, MDB_PS_FIRST|MDB_PS_MODIFY); - if (rc && rc != MDB_NOTFOUND) - return rc; - } - - if (!env->me_pghead && txn->mt_loose_pgs) { - /* Put loose page numbers in mt_free_pgs, since - * we may be unable to return them to me_pghead. - */ - MDB_page *mp = txn->mt_loose_pgs; - if ((rc = mdb_midl_need(&txn->mt_free_pgs, txn->mt_loose_count)) != 0) - return rc; - for (; mp; mp = NEXT_LOOSE_PAGE(mp)) - mdb_midl_xappend(txn->mt_free_pgs, mp->mp_pgno); - txn->mt_loose_pgs = NULL; - txn->mt_loose_count = 0; - } - - /* MDB_RESERVE cancels meminit in ovpage malloc (when no WRITEMAP) */ - clean_limit = (env->me_flags & (MDB_NOMEMINIT|MDB_WRITEMAP)) - ? SSIZE_MAX : maxfree_1pg; - - for (;;) { - /* Come back here after each Put() in case freelist changed */ - MDB_val key, data; - pgno_t *pgs; - ssize_t j; - - /* If using records from freeDB which we have not yet - * deleted, delete them and any we reserved for me_pghead. - */ - while (pglast < env->me_pglast) { - rc = mdb_cursor_first(&mc, &key, NULL); - if (rc) - return rc; - pglast = head_id = *(txnid_t *)key.mv_data; - total_room = head_room = 0; - mdb_tassert(txn, pglast <= env->me_pglast); - rc = mdb_cursor_del(&mc, 0); - if (rc) - return rc; - } - - /* Save the IDL of pages freed by this txn, to a single record */ - if (freecnt < txn->mt_free_pgs[0]) { - if (!freecnt) { - /* Make sure last page of freeDB is touched and on freelist */ - rc = mdb_page_search(&mc, NULL, MDB_PS_LAST|MDB_PS_MODIFY); - if (rc && rc != MDB_NOTFOUND) - return rc; - } - free_pgs = txn->mt_free_pgs; - /* Write to last page of freeDB */ - key.mv_size = sizeof(txn->mt_txnid); - key.mv_data = &txn->mt_txnid; - do { - freecnt = free_pgs[0]; - data.mv_size = MDB_IDL_SIZEOF(free_pgs); - rc = mdb_cursor_put(&mc, &key, &data, MDB_RESERVE); - if (rc) - return rc; - /* Retry if mt_free_pgs[] grew during the Put() */ - free_pgs = txn->mt_free_pgs; - } while (freecnt < free_pgs[0]); - mdb_midl_sort(free_pgs); - memcpy(data.mv_data, free_pgs, data.mv_size); -#if (MDB_DEBUG) > 1 - { - unsigned int i = free_pgs[0]; - DPRINTF(("IDL write txn %"Z"u root %"Z"u num %u", - txn->mt_txnid, txn->mt_dbs[FREE_DBI].md_root, i)); - for (; i; i--) - DPRINTF(("IDL %"Z"u", free_pgs[i])); - } -#endif - continue; - } - - mop = env->me_pghead; - mop_len = (mop ? mop[0] : 0) + txn->mt_loose_count; - - /* Reserve records for me_pghead[]. Split it if multi-page, - * to avoid searching freeDB for a page range. Use keys in - * range [1,me_pglast]: Smaller than txnid of oldest reader. - */ - if (total_room >= mop_len) { - if (total_room == mop_len || --more < 0) - break; - } else if (head_room >= maxfree_1pg && head_id > 1) { - /* Keep current record (overflow page), add a new one */ - head_id--; - head_room = 0; - } - /* (Re)write {key = head_id, IDL length = head_room} */ - total_room -= head_room; - head_room = mop_len - total_room; - if (head_room > maxfree_1pg && head_id > 1) { - /* Overflow multi-page for part of me_pghead */ - head_room /= head_id; /* amortize page sizes */ - head_room += maxfree_1pg - head_room % (maxfree_1pg + 1); - } else if (head_room < 0) { - /* Rare case, not bothering to delete this record */ - head_room = 0; - } - key.mv_size = sizeof(head_id); - key.mv_data = &head_id; - data.mv_size = (head_room + 1) * sizeof(pgno_t); - rc = mdb_cursor_put(&mc, &key, &data, MDB_RESERVE); - if (rc) - return rc; - /* IDL is initially empty, zero out at least the length */ - pgs = (pgno_t *)data.mv_data; - j = head_room > clean_limit ? head_room : 0; - do { - pgs[j] = 0; - } while (--j >= 0); - total_room += head_room; - } - - /* Return loose page numbers to me_pghead, though usually none are - * left at this point. The pages themselves remain in dirty_list. - */ - if (txn->mt_loose_pgs) { - MDB_page *mp = txn->mt_loose_pgs; - unsigned count = txn->mt_loose_count; - MDB_IDL loose; - /* Room for loose pages + temp IDL with same */ - if ((rc = mdb_midl_need(&env->me_pghead, 2*count+1)) != 0) - return rc; - mop = env->me_pghead; - loose = mop + MDB_IDL_ALLOCLEN(mop) - count; - for (count = 0; mp; mp = NEXT_LOOSE_PAGE(mp)) - loose[ ++count ] = mp->mp_pgno; - loose[0] = count; - mdb_midl_sort(loose); - mdb_midl_xmerge(mop, loose); - txn->mt_loose_pgs = NULL; - txn->mt_loose_count = 0; - mop_len = mop[0]; - } - - /* Fill in the reserved me_pghead records */ - rc = MDB_SUCCESS; - if (mop_len) { - MDB_val key, data; - - mop += mop_len; - rc = mdb_cursor_first(&mc, &key, &data); - for (; !rc; rc = mdb_cursor_next(&mc, &key, &data, MDB_NEXT)) { - txnid_t id = *(txnid_t *)key.mv_data; - ssize_t len = (ssize_t)(data.mv_size / sizeof(MDB_ID)) - 1; - MDB_ID save; - - mdb_tassert(txn, len >= 0 && id <= env->me_pglast); - key.mv_data = &id; - if (len > mop_len) { - len = mop_len; - data.mv_size = (len + 1) * sizeof(MDB_ID); - } - data.mv_data = mop -= len; - save = mop[0]; - mop[0] = len; - rc = mdb_cursor_put(&mc, &key, &data, MDB_CURRENT); - mop[0] = save; - if (rc || !(mop_len -= len)) - break; - } - } - return rc; -} - -/** Flush (some) dirty pages to the map, after clearing their dirty flag. - * @param[in] txn the transaction that's being committed - * @param[in] keep number of initial pages in dirty_list to keep dirty. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_flush(MDB_txn *txn, int keep) -{ - MDB_env *env = txn->mt_env; - MDB_ID2L dl = txn->mt_u.dirty_list; - unsigned psize = env->me_psize, j; - int i, pagecount = dl[0].mid, rc; - size_t size = 0, pos = 0; - pgno_t pgno = 0; - MDB_page *dp = NULL; -#ifdef _WIN32 - OVERLAPPED ov; -#else - struct iovec iov[MDB_COMMIT_PAGES]; - ssize_t wpos = 0, wsize = 0, wres; - size_t next_pos = 1; /* impossible pos, so pos != next_pos */ - int n = 0; -#endif - - j = i = keep; - - if (env->me_flags & MDB_WRITEMAP) { - /* Clear dirty flags */ - while (++i <= pagecount) { - dp = dl[i].mptr; - /* Don't flush this page yet */ - if (dp->mp_flags & (P_LOOSE|P_KEEP)) { - dp->mp_flags &= ~P_KEEP; - dl[++j] = dl[i]; - continue; - } - dp->mp_flags &= ~P_DIRTY; - } - goto done; - } - - /* Write the pages */ - for (;;) { - if (++i <= pagecount) { - dp = dl[i].mptr; - /* Don't flush this page yet */ - if (dp->mp_flags & (P_LOOSE|P_KEEP)) { - dp->mp_flags &= ~P_KEEP; - dl[i].mid = 0; - continue; - } - pgno = dl[i].mid; - /* clear dirty flag */ - dp->mp_flags &= ~P_DIRTY; - pos = pgno * psize; - size = psize; - if (IS_OVERFLOW(dp)) size *= dp->mp_pages; - } -#ifdef _WIN32 - else break; - - /* Windows actually supports scatter/gather I/O, but only on - * unbuffered file handles. Since we're relying on the OS page - * cache for all our data, that's self-defeating. So we just - * write pages one at a time. We use the ov structure to set - * the write offset, to at least save the overhead of a Seek - * system call. - */ - DPRINTF(("committing page %"Z"u", pgno)); - memset(&ov, 0, sizeof(ov)); - ov.Offset = pos & 0xffffffff; - ov.OffsetHigh = pos >> 16 >> 16; - if (!WriteFile(env->me_fd, dp, size, NULL, &ov)) { - rc = ErrCode(); - DPRINTF(("WriteFile: %d", rc)); - return rc; - } -#else - /* Write up to MDB_COMMIT_PAGES dirty pages at a time. */ - if (pos!=next_pos || n==MDB_COMMIT_PAGES || wsize+size>MAX_WRITE) { - if (n) { -retry_write: - /* Write previous page(s) */ -#ifdef MDB_USE_PWRITEV - wres = pwritev(env->me_fd, iov, n, wpos); -#else - if (n == 1) { - wres = pwrite(env->me_fd, iov[0].iov_base, wsize, wpos); - } else { -retry_seek: - if (lseek(env->me_fd, wpos, SEEK_SET) == -1) { - rc = ErrCode(); - if (rc == EINTR) - goto retry_seek; - DPRINTF(("lseek: %s", strerror(rc))); - return rc; - } - wres = writev(env->me_fd, iov, n); - } -#endif - if (wres != wsize) { - if (wres < 0) { - rc = ErrCode(); - if (rc == EINTR) - goto retry_write; - DPRINTF(("Write error: %s", strerror(rc))); - } else { - rc = EIO; /* TODO: Use which error code? */ - DPUTS("short write, filesystem full?"); - } - return rc; - } - n = 0; - } - if (i > pagecount) - break; - wpos = pos; - wsize = 0; - } - DPRINTF(("committing page %"Z"u", pgno)); - next_pos = pos + size; - iov[n].iov_len = size; - iov[n].iov_base = (char *)dp; - wsize += size; - n++; -#endif /* _WIN32 */ - } - - /* MIPS has cache coherency issues, this is a no-op everywhere else - * Note: for any size >= on-chip cache size, entire on-chip cache is - * flushed. - */ - CACHEFLUSH(env->me_map, txn->mt_next_pgno * env->me_psize, DCACHE); - - for (i = keep; ++i <= pagecount; ) { - dp = dl[i].mptr; - /* This is a page we skipped above */ - if (!dl[i].mid) { - dl[++j] = dl[i]; - dl[j].mid = dp->mp_pgno; - continue; - } - mdb_dpage_free(env, dp); - } - -done: - i--; - txn->mt_dirty_room += i - j; - dl[0].mid = j; - return MDB_SUCCESS; -} - -int -mdb_txn_commit(MDB_txn *txn) -{ - int rc; - unsigned int i; - MDB_env *env; - - if (txn == NULL || txn->mt_env == NULL) - return EINVAL; - - if (txn->mt_child) { - rc = mdb_txn_commit(txn->mt_child); - txn->mt_child = NULL; - if (rc) - goto fail; - } - - env = txn->mt_env; - - if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) { - mdb_dbis_update(txn, 1); - txn->mt_numdbs = 2; /* so txn_abort() doesn't close any new handles */ - mdb_txn_abort(txn); - return MDB_SUCCESS; - } - - if (F_ISSET(txn->mt_flags, MDB_TXN_ERROR)) { - DPUTS("error flag is set, can't commit"); - if (txn->mt_parent) - txn->mt_parent->mt_flags |= MDB_TXN_ERROR; - rc = MDB_BAD_TXN; - goto fail; - } - - if (txn->mt_parent) { - MDB_txn *parent = txn->mt_parent; - MDB_page **lp; - MDB_ID2L dst, src; - MDB_IDL pspill; - unsigned x, y, len, ps_len; - - /* Append our free list to parent's */ - rc = mdb_midl_append_list(&parent->mt_free_pgs, txn->mt_free_pgs); - if (rc) - goto fail; - mdb_midl_free(txn->mt_free_pgs); - /* Failures after this must either undo the changes - * to the parent or set MDB_TXN_ERROR in the parent. - */ - - parent->mt_next_pgno = txn->mt_next_pgno; - parent->mt_flags = txn->mt_flags; - - /* Merge our cursors into parent's and close them */ - mdb_cursors_close(txn, 1); - - /* Update parent's DB table. */ - memcpy(parent->mt_dbs, txn->mt_dbs, txn->mt_numdbs * sizeof(MDB_db)); - parent->mt_numdbs = txn->mt_numdbs; - parent->mt_dbflags[0] = txn->mt_dbflags[0]; - parent->mt_dbflags[1] = txn->mt_dbflags[1]; - for (i=2; imt_numdbs; i++) { - /* preserve parent's DB_NEW status */ - x = parent->mt_dbflags[i] & DB_NEW; - parent->mt_dbflags[i] = txn->mt_dbflags[i] | x; - } - - dst = parent->mt_u.dirty_list; - src = txn->mt_u.dirty_list; - /* Remove anything in our dirty list from parent's spill list */ - if ((pspill = parent->mt_spill_pgs) && (ps_len = pspill[0])) { - x = y = ps_len; - pspill[0] = (pgno_t)-1; - /* Mark our dirty pages as deleted in parent spill list */ - for (i=0, len=src[0].mid; ++i <= len; ) { - MDB_ID pn = src[i].mid << 1; - while (pn > pspill[x]) - x--; - if (pn == pspill[x]) { - pspill[x] = 1; - y = --x; - } - } - /* Squash deleted pagenums if we deleted any */ - for (x=y; ++x <= ps_len; ) - if (!(pspill[x] & 1)) - pspill[++y] = pspill[x]; - pspill[0] = y; - } - - /* Find len = length of merging our dirty list with parent's */ - x = dst[0].mid; - dst[0].mid = 0; /* simplify loops */ - if (parent->mt_parent) { - len = x + src[0].mid; - y = mdb_mid2l_search(src, dst[x].mid + 1) - 1; - for (i = x; y && i; y--) { - pgno_t yp = src[y].mid; - while (yp < dst[i].mid) - i--; - if (yp == dst[i].mid) { - i--; - len--; - } - } - } else { /* Simplify the above for single-ancestor case */ - len = MDB_IDL_UM_MAX - txn->mt_dirty_room; - } - /* Merge our dirty list with parent's */ - y = src[0].mid; - for (i = len; y; dst[i--] = src[y--]) { - pgno_t yp = src[y].mid; - while (yp < dst[x].mid) - dst[i--] = dst[x--]; - if (yp == dst[x].mid) - free(dst[x--].mptr); - } - mdb_tassert(txn, i == x); - dst[0].mid = len; - free(txn->mt_u.dirty_list); - parent->mt_dirty_room = txn->mt_dirty_room; - if (txn->mt_spill_pgs) { - if (parent->mt_spill_pgs) { - /* TODO: Prevent failure here, so parent does not fail */ - rc = mdb_midl_append_list(&parent->mt_spill_pgs, txn->mt_spill_pgs); - if (rc) - parent->mt_flags |= MDB_TXN_ERROR; - mdb_midl_free(txn->mt_spill_pgs); - mdb_midl_sort(parent->mt_spill_pgs); - } else { - parent->mt_spill_pgs = txn->mt_spill_pgs; - } - } - - /* Append our loose page list to parent's */ - for (lp = &parent->mt_loose_pgs; *lp; lp = &NEXT_LOOSE_PAGE(lp)) - ; - *lp = txn->mt_loose_pgs; - parent->mt_loose_count += txn->mt_loose_count; - - parent->mt_child = NULL; - mdb_midl_free(((MDB_ntxn *)txn)->mnt_pgstate.mf_pghead); - free(txn); - return rc; - } - - if (txn != env->me_txn) { - DPUTS("attempt to commit unknown transaction"); - rc = EINVAL; - goto fail; - } - - mdb_cursors_close(txn, 0); - - if (!txn->mt_u.dirty_list[0].mid && - !(txn->mt_flags & (MDB_TXN_DIRTY|MDB_TXN_SPILLS))) - goto done; - - DPRINTF(("committing txn %"Z"u %p on mdbenv %p, root page %"Z"u", - txn->mt_txnid, (void*)txn, (void*)env, txn->mt_dbs[MAIN_DBI].md_root)); - - /* Update DB root pointers */ - if (txn->mt_numdbs > 2) { - MDB_cursor mc; - MDB_dbi i; - MDB_val data; - data.mv_size = sizeof(MDB_db); - - mdb_cursor_init(&mc, txn, MAIN_DBI, NULL); - for (i = 2; i < txn->mt_numdbs; i++) { - if (txn->mt_dbflags[i] & DB_DIRTY) { - if (TXN_DBI_CHANGED(txn, i)) { - rc = MDB_BAD_DBI; - goto fail; - } - data.mv_data = &txn->mt_dbs[i]; - rc = mdb_cursor_put(&mc, &txn->mt_dbxs[i].md_name, &data, 0); - if (rc) - goto fail; - } - } - } - - rc = mdb_freelist_save(txn); - if (rc) - goto fail; - - mdb_midl_free(env->me_pghead); - env->me_pghead = NULL; - if (mdb_midl_shrink(&txn->mt_free_pgs)) - env->me_free_pgs = txn->mt_free_pgs; - -#if (MDB_DEBUG) > 2 - mdb_audit(txn); -#endif - - if ((rc = mdb_page_flush(txn, 0)) || - (rc = mdb_env_sync(env, 0)) || - (rc = mdb_env_write_meta(txn))) - goto fail; - - /* Free P_LOOSE pages left behind in dirty_list */ - if (!(env->me_flags & MDB_WRITEMAP)) - mdb_dlist_free(txn); - -done: - env->me_pglast = 0; - env->me_txn = NULL; - mdb_dbis_update(txn, 1); - - if (env->me_txns) - UNLOCK_MUTEX_W(env); - if (txn != env->me_txn0) - free(txn); - - return MDB_SUCCESS; - -fail: - mdb_txn_abort(txn); - return rc; -} - -/** Read the environment parameters of a DB environment before - * mapping it into memory. - * @param[in] env the environment handle - * @param[out] meta address of where to store the meta information - * @return 0 on success, non-zero on failure. - */ -static int ESECT -mdb_env_read_header(MDB_env *env, MDB_meta *meta) -{ - MDB_metabuf pbuf; - MDB_page *p; - MDB_meta *m; - int i, rc, off; - enum { Size = sizeof(pbuf) }; - - /* We don't know the page size yet, so use a minimum value. - * Read both meta pages so we can use the latest one. - */ - - for (i=off=0; i<2; i++, off = meta->mm_psize) { -#ifdef _WIN32 - DWORD len; - OVERLAPPED ov; - memset(&ov, 0, sizeof(ov)); - ov.Offset = off; - rc = ReadFile(env->me_fd, &pbuf, Size, &len, &ov) ? (int)len : -1; - if (rc == -1 && ErrCode() == ERROR_HANDLE_EOF) - rc = 0; -#else - rc = pread(env->me_fd, &pbuf, Size, off); -#endif - if (rc != Size) { - if (rc == 0 && off == 0) - return ENOENT; - rc = rc < 0 ? (int) ErrCode() : MDB_INVALID; - DPRINTF(("read: %s", mdb_strerror(rc))); - return rc; - } - - p = (MDB_page *)&pbuf; - - if (!F_ISSET(p->mp_flags, P_META)) { - DPRINTF(("page %"Z"u not a meta page", p->mp_pgno)); - return MDB_INVALID; - } - - m = METADATA(p); - if (m->mm_magic != MDB_MAGIC) { - DPUTS("meta has invalid magic"); - return MDB_INVALID; - } - - if (m->mm_version != MDB_DATA_VERSION) { - DPRINTF(("database is version %u, expected version %u", - m->mm_version, MDB_DATA_VERSION)); - return MDB_VERSION_MISMATCH; - } - - if (off == 0 || m->mm_txnid > meta->mm_txnid) - *meta = *m; - } - return 0; -} - -static void ESECT -mdb_env_init_meta0(MDB_env *env, MDB_meta *meta) -{ - meta->mm_magic = MDB_MAGIC; - meta->mm_version = MDB_DATA_VERSION; - meta->mm_mapsize = env->me_mapsize; - meta->mm_psize = env->me_psize; - meta->mm_last_pg = 1; - meta->mm_flags = env->me_flags & 0xffff; - meta->mm_flags |= MDB_INTEGERKEY; - meta->mm_dbs[0].md_root = P_INVALID; - meta->mm_dbs[1].md_root = P_INVALID; -} - -/** Write the environment parameters of a freshly created DB environment. - * @param[in] env the environment handle - * @param[out] meta address of where to store the meta information - * @return 0 on success, non-zero on failure. - */ -static int ESECT -mdb_env_init_meta(MDB_env *env, MDB_meta *meta) -{ - MDB_page *p, *q; - int rc; - unsigned int psize; -#ifdef _WIN32 - DWORD len; - OVERLAPPED ov; - memset(&ov, 0, sizeof(ov)); -#define DO_PWRITE(rc, fd, ptr, size, len, pos) do { \ - ov.Offset = pos; \ - rc = WriteFile(fd, ptr, size, &len, &ov); } while(0) -#else - int len; -#define DO_PWRITE(rc, fd, ptr, size, len, pos) do { \ - len = pwrite(fd, ptr, size, pos); \ - if (len == -1 && ErrCode() == EINTR) continue; \ - rc = (len >= 0); break; } while(1) -#endif - - DPUTS("writing new meta page"); - - psize = env->me_psize; - - mdb_env_init_meta0(env, meta); - - p = calloc(2, psize); - p->mp_pgno = 0; - p->mp_flags = P_META; - *(MDB_meta *)METADATA(p) = *meta; - - q = (MDB_page *)((char *)p + psize); - q->mp_pgno = 1; - q->mp_flags = P_META; - *(MDB_meta *)METADATA(q) = *meta; - - DO_PWRITE(rc, env->me_fd, p, psize * 2, len, 0); - if (!rc) - rc = ErrCode(); - else if ((unsigned) len == psize * 2) - rc = MDB_SUCCESS; - else - rc = ENOSPC; - free(p); - return rc; -} - -/** Update the environment info to commit a transaction. - * @param[in] txn the transaction that's being committed - * @return 0 on success, non-zero on failure. - */ -static int -mdb_env_write_meta(MDB_txn *txn) -{ - MDB_env *env; - MDB_meta meta, metab, *mp; - size_t mapsize; - off_t off; - int rc, len, toggle; - char *ptr; - HANDLE mfd; -#ifdef _WIN32 - OVERLAPPED ov; -#else - int r2; -#endif - - toggle = txn->mt_txnid & 1; - DPRINTF(("writing meta page %d for root page %"Z"u", - toggle, txn->mt_dbs[MAIN_DBI].md_root)); - - env = txn->mt_env; - mp = env->me_metas[toggle]; - mapsize = env->me_metas[toggle ^ 1]->mm_mapsize; - /* Persist any increases of mapsize config */ - if (mapsize < env->me_mapsize) - mapsize = env->me_mapsize; - - if (env->me_flags & MDB_WRITEMAP) { - mp->mm_mapsize = mapsize; - mp->mm_dbs[0] = txn->mt_dbs[0]; - mp->mm_dbs[1] = txn->mt_dbs[1]; - mp->mm_last_pg = txn->mt_next_pgno - 1; - mp->mm_txnid = txn->mt_txnid; - if (!(env->me_flags & (MDB_NOMETASYNC|MDB_NOSYNC))) { - unsigned meta_size = env->me_psize; - rc = (env->me_flags & MDB_MAPASYNC) ? MS_ASYNC : MS_SYNC; - ptr = env->me_map; - if (toggle) { -#ifndef _WIN32 /* POSIX msync() requires ptr = start of OS page */ - if (meta_size < env->me_os_psize) - meta_size += meta_size; - else -#endif - ptr += meta_size; - } - if (MDB_MSYNC(ptr, meta_size, rc)) { - rc = ErrCode(); - goto fail; - } - } - goto done; - } - metab.mm_txnid = env->me_metas[toggle]->mm_txnid; - metab.mm_last_pg = env->me_metas[toggle]->mm_last_pg; - - meta.mm_mapsize = mapsize; - meta.mm_dbs[0] = txn->mt_dbs[0]; - meta.mm_dbs[1] = txn->mt_dbs[1]; - meta.mm_last_pg = txn->mt_next_pgno - 1; - meta.mm_txnid = txn->mt_txnid; - - off = offsetof(MDB_meta, mm_mapsize); - ptr = (char *)&meta + off; - len = sizeof(MDB_meta) - off; - if (toggle) - off += env->me_psize; - off += PAGEHDRSZ; - - /* Write to the SYNC fd */ - mfd = env->me_flags & (MDB_NOSYNC|MDB_NOMETASYNC) ? - env->me_fd : env->me_mfd; -retry_write: -#ifdef _WIN32 - { - memset(&ov, 0, sizeof(ov)); - ov.Offset = off; - if (!WriteFile(mfd, ptr, len, (DWORD *)&rc, &ov)) - rc = -1; - } -#else - rc = pwrite(mfd, ptr, len, off); -#endif - if (rc != len) { - rc = rc < 0 ? ErrCode() : EIO; - if (rc == EINTR) - goto retry_write; - DPUTS("write failed, disk error?"); - /* On a failure, the pagecache still contains the new data. - * Write some old data back, to prevent it from being used. - * Use the non-SYNC fd; we know it will fail anyway. - */ - meta.mm_last_pg = metab.mm_last_pg; - meta.mm_txnid = metab.mm_txnid; -#ifdef _WIN32 - memset(&ov, 0, sizeof(ov)); - ov.Offset = off; - WriteFile(env->me_fd, ptr, len, NULL, &ov); -#else - r2 = pwrite(env->me_fd, ptr, len, off); - (void)r2; /* Silence warnings. We don't care about pwrite's return value */ -#endif -fail: - env->me_flags |= MDB_FATAL_ERROR; - return rc; - } - /* MIPS has cache coherency issues, this is a no-op everywhere else */ - CACHEFLUSH(env->me_map + off, len, DCACHE); -done: - /* Memory ordering issues are irrelevant; since the entire writer - * is wrapped by wmutex, all of these changes will become visible - * after the wmutex is unlocked. Since the DB is multi-version, - * readers will get consistent data regardless of how fresh or - * how stale their view of these values is. - */ - if (env->me_txns) - env->me_txns->mti_txnid = txn->mt_txnid; - - return MDB_SUCCESS; -} - -/** Check both meta pages to see which one is newer. - * @param[in] env the environment handle - * @return meta toggle (0 or 1). - */ -static int -mdb_env_pick_meta(const MDB_env *env) -{ - return (env->me_metas[0]->mm_txnid < env->me_metas[1]->mm_txnid); -} - -int ESECT -mdb_env_create(MDB_env **env) -{ - MDB_env *e; - - e = calloc(1, sizeof(MDB_env)); - if (!e) - return ENOMEM; - - e->me_maxreaders = DEFAULT_READERS; - e->me_maxdbs = e->me_numdbs = 2; - e->me_fd = INVALID_HANDLE_VALUE; - e->me_lfd = INVALID_HANDLE_VALUE; - e->me_mfd = INVALID_HANDLE_VALUE; -#ifdef MDB_USE_POSIX_SEM - e->me_rmutex = SEM_FAILED; - e->me_wmutex = SEM_FAILED; -#endif - e->me_pid = getpid(); - GET_PAGESIZE(e->me_os_psize); - VGMEMP_CREATE(e,0,0); - *env = e; - return MDB_SUCCESS; -} - -static int ESECT -mdb_env_map(MDB_env *env, void *addr) -{ - MDB_page *p; - unsigned int flags = env->me_flags; -#ifdef _WIN32 - int rc; - HANDLE mh; - LONG sizelo, sizehi; - size_t msize; - - if (flags & MDB_RDONLY) { - /* Don't set explicit map size, use whatever exists */ - msize = 0; - sizelo = 0; - sizehi = 0; - } else { - msize = env->me_mapsize; - sizelo = msize & 0xffffffff; - sizehi = msize >> 16 >> 16; /* only needed on Win64 */ - - /* Windows won't create mappings for zero length files. - * and won't map more than the file size. - * Just set the maxsize right now. - */ - if (SetFilePointer(env->me_fd, sizelo, &sizehi, 0) != (DWORD)sizelo - || !SetEndOfFile(env->me_fd) - || SetFilePointer(env->me_fd, 0, NULL, 0) != 0) - return ErrCode(); - } - - mh = CreateFileMapping(env->me_fd, NULL, flags & MDB_WRITEMAP ? - PAGE_READWRITE : PAGE_READONLY, - sizehi, sizelo, NULL); - if (!mh) - return ErrCode(); - env->me_map = MapViewOfFileEx(mh, flags & MDB_WRITEMAP ? - FILE_MAP_WRITE : FILE_MAP_READ, - 0, 0, msize, addr); - rc = env->me_map ? 0 : ErrCode(); - CloseHandle(mh); - if (rc) - return rc; -#else - int prot = PROT_READ; - if (flags & MDB_WRITEMAP) { - prot |= PROT_WRITE; - if (ftruncate(env->me_fd, env->me_mapsize) < 0) - return ErrCode(); - } - env->me_map = mmap(addr, env->me_mapsize, prot, MAP_SHARED, - env->me_fd, 0); - if (env->me_map == MAP_FAILED) { - env->me_map = NULL; - return ErrCode(); - } - - if (flags & MDB_NORDAHEAD) { - /* Turn off readahead. It's harmful when the DB is larger than RAM. */ -#ifdef MADV_RANDOM - madvise(env->me_map, env->me_mapsize, MADV_RANDOM); -#else -#ifdef POSIX_MADV_RANDOM - posix_madvise(env->me_map, env->me_mapsize, POSIX_MADV_RANDOM); -#endif /* POSIX_MADV_RANDOM */ -#endif /* MADV_RANDOM */ - } -#endif /* _WIN32 */ - - /* Can happen because the address argument to mmap() is just a - * hint. mmap() can pick another, e.g. if the range is in use. - * The MAP_FIXED flag would prevent that, but then mmap could - * instead unmap existing pages to make room for the new map. - */ - if (addr && env->me_map != addr) - return EBUSY; /* TODO: Make a new MDB_* error code? */ - - p = (MDB_page *)env->me_map; - env->me_metas[0] = METADATA(p); - env->me_metas[1] = (MDB_meta *)((char *)env->me_metas[0] + env->me_psize); - - return MDB_SUCCESS; -} - -int ESECT -mdb_env_set_mapsize(MDB_env *env, size_t size) -{ - /* If env is already open, caller is responsible for making - * sure there are no active txns. - */ - if (env->me_map) { - int rc; - void *old; - if (env->me_txn) - return EINVAL; - if (!size) - size = env->me_metas[mdb_env_pick_meta(env)]->mm_mapsize; - else if (size < env->me_mapsize) { - /* If the configured size is smaller, make sure it's - * still big enough. Silently round up to minimum if not. - */ - size_t minsize = (env->me_metas[mdb_env_pick_meta(env)]->mm_last_pg + 1) * env->me_psize; - if (size < minsize) - size = minsize; - } - munmap(env->me_map, env->me_mapsize); - env->me_mapsize = size; - old = (env->me_flags & MDB_FIXEDMAP) ? env->me_map : NULL; - rc = mdb_env_map(env, old); - if (rc) - return rc; - } - env->me_mapsize = size; - if (env->me_psize) - env->me_maxpg = env->me_mapsize / env->me_psize; - return MDB_SUCCESS; -} - -int ESECT -mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs) -{ - if (env->me_map) - return EINVAL; - env->me_maxdbs = dbs + 2; /* Named databases + main and free DB */ - return MDB_SUCCESS; -} - -int ESECT -mdb_env_set_maxreaders(MDB_env *env, unsigned int readers) -{ - if (env->me_map || readers < 1) - return EINVAL; - env->me_maxreaders = readers; - return MDB_SUCCESS; -} - -int ESECT -mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers) -{ - if (!env || !readers) - return EINVAL; - *readers = env->me_maxreaders; - return MDB_SUCCESS; -} - -static int ESECT -mdb_fsize(HANDLE fd, size_t *size) -{ -#ifdef _WIN32 - LARGE_INTEGER fsize; - - if (!GetFileSizeEx(fd, &fsize)) - return ErrCode(); - - *size = fsize.QuadPart; -#else - struct stat st; - - if (fstat(fd, &st)) - return ErrCode(); - - *size = st.st_size; -#endif - return MDB_SUCCESS; -} - -#ifdef BROKEN_FDATASYNC -#include -#include -#endif - -/** Further setup required for opening an LMDB environment - */ -static int ESECT -mdb_env_open2(MDB_env *env) -{ - unsigned int flags = env->me_flags; - int i, newenv = 0, rc; - MDB_meta meta; - -#ifdef _WIN32 - /* See if we should use QueryLimited */ - rc = GetVersion(); - if ((rc & 0xff) > 5) - env->me_pidquery = MDB_PROCESS_QUERY_LIMITED_INFORMATION; - else - env->me_pidquery = PROCESS_QUERY_INFORMATION; -#endif /* _WIN32 */ -#ifdef BROKEN_FDATASYNC - /* ext3/ext4 fdatasync is broken on some older Linux kernels. - * https://lkml.org/lkml/2012/9/3/83 - * Kernels after 3.6-rc6 are known good. - * https://lkml.org/lkml/2012/9/10/556 - * See if the DB is on ext3/ext4, then check for new enough kernel - * Kernels 2.6.32.60, 2.6.34.15, 3.2.30, and 3.5.4 are also known - * to be patched. - */ - { - struct statfs st; - fstatfs(env->me_fd, &st); - while (st.f_type == 0xEF53) { - struct utsname uts; - int i; - uname(&uts); - if (uts.release[0] < '3') { - if (!strncmp(uts.release, "2.6.32.", 7)) { - i = atoi(uts.release+7); - if (i >= 60) - break; /* 2.6.32.60 and newer is OK */ - } else if (!strncmp(uts.release, "2.6.34.", 7)) { - i = atoi(uts.release+7); - if (i >= 15) - break; /* 2.6.34.15 and newer is OK */ - } - } else if (uts.release[0] == '3') { - i = atoi(uts.release+2); - if (i > 5) - break; /* 3.6 and newer is OK */ - if (i == 5) { - i = atoi(uts.release+4); - if (i >= 4) - break; /* 3.5.4 and newer is OK */ - } else if (i == 2) { - i = atoi(uts.release+4); - if (i >= 30) - break; /* 3.2.30 and newer is OK */ - } - } else { /* 4.x and newer is OK */ - break; - } - env->me_flags |= MDB_FSYNCONLY; - break; - } - } -#endif - - memset(&meta, 0, sizeof(meta)); - - if ((i = mdb_env_read_header(env, &meta)) != 0) { - if (i != ENOENT) - return i; - DPUTS("new mdbenv"); - newenv = 1; - env->me_psize = env->me_os_psize; - if (env->me_psize > MAX_PAGESIZE) - env->me_psize = MAX_PAGESIZE; - } else { - env->me_psize = meta.mm_psize; - } - - /* Was a mapsize configured? */ - if (!env->me_mapsize) { - /* If this is a new environment, take the default, - * else use the size recorded in the existing env. - */ - env->me_mapsize = newenv ? DEFAULT_MAPSIZE : meta.mm_mapsize; - } else if (env->me_mapsize < meta.mm_mapsize) { - /* If the configured size is smaller, make sure it's - * still big enough. Silently round up to minimum if not. - */ - size_t minsize = (meta.mm_last_pg + 1) * meta.mm_psize; - if (env->me_mapsize < minsize) - env->me_mapsize = minsize; - } - - rc = mdb_env_map(env, (flags & MDB_FIXEDMAP) ? meta.mm_address : NULL); - if (rc) - return rc; - - if (newenv) { - if (flags & MDB_FIXEDMAP) - meta.mm_address = env->me_map; - i = mdb_env_init_meta(env, &meta); - if (i != MDB_SUCCESS) { - return i; - } - } - - env->me_maxfree_1pg = (env->me_psize - PAGEHDRSZ) / sizeof(pgno_t) - 1; - env->me_nodemax = (((env->me_psize - PAGEHDRSZ) / MDB_MINKEYS) & -2) - - sizeof(indx_t); -#if !(MDB_MAXKEYSIZE) - env->me_maxkey = env->me_nodemax - (NODESIZE + sizeof(MDB_db)); -#endif - env->me_maxpg = env->me_mapsize / env->me_psize; - -#if MDB_DEBUG - { - int toggle = mdb_env_pick_meta(env); - MDB_db *db = &env->me_metas[toggle]->mm_dbs[MAIN_DBI]; - - DPRINTF(("opened database version %u, pagesize %u", - env->me_metas[0]->mm_version, env->me_psize)); - DPRINTF(("using meta page %d", toggle)); - DPRINTF(("depth: %u", db->md_depth)); - DPRINTF(("entries: %"Z"u", db->md_entries)); - DPRINTF(("branch pages: %"Z"u", db->md_branch_pages)); - DPRINTF(("leaf pages: %"Z"u", db->md_leaf_pages)); - DPRINTF(("overflow pages: %"Z"u", db->md_overflow_pages)); - DPRINTF(("root: %"Z"u", db->md_root)); - } -#endif - - return MDB_SUCCESS; -} - - -/** Release a reader thread's slot in the reader lock table. - * This function is called automatically when a thread exits. - * @param[in] ptr This points to the slot in the reader lock table. - */ -static void -mdb_env_reader_dest(void *ptr) -{ - MDB_reader *reader = ptr; - - reader->mr_pid = 0; -} - -#ifdef _WIN32 -/** Junk for arranging thread-specific callbacks on Windows. This is - * necessarily platform and compiler-specific. Windows supports up - * to 1088 keys. Let's assume nobody opens more than 64 environments - * in a single process, for now. They can override this if needed. - */ -#ifndef MAX_TLS_KEYS -#define MAX_TLS_KEYS 64 -#endif -static pthread_key_t mdb_tls_keys[MAX_TLS_KEYS]; -static int mdb_tls_nkeys; - -static void NTAPI mdb_tls_callback(PVOID module, DWORD reason, PVOID ptr) -{ - int i; - switch(reason) { - case DLL_PROCESS_ATTACH: break; - case DLL_THREAD_ATTACH: break; - case DLL_THREAD_DETACH: - for (i=0; ime_txns->mti_txnid = env->me_metas[toggle]->mm_txnid; - -#ifdef _WIN32 - { - OVERLAPPED ov; - /* First acquire a shared lock. The Unlock will - * then release the existing exclusive lock. - */ - memset(&ov, 0, sizeof(ov)); - if (!LockFileEx(env->me_lfd, 0, 0, 1, 0, &ov)) { - rc = ErrCode(); - } else { - UnlockFile(env->me_lfd, 0, 0, 1, 0); - *excl = 0; - } - } -#else - { - struct flock lock_info; - /* The shared lock replaces the existing lock */ - memset((void *)&lock_info, 0, sizeof(lock_info)); - lock_info.l_type = F_RDLCK; - lock_info.l_whence = SEEK_SET; - lock_info.l_start = 0; - lock_info.l_len = 1; - while ((rc = fcntl(env->me_lfd, F_SETLK, &lock_info)) && - (rc = ErrCode()) == EINTR) ; - *excl = rc ? -1 : 0; /* error may mean we lost the lock */ - } -#endif - - return rc; -} - -/** Try to get exclusive lock, otherwise shared. - * Maintain *excl = -1: no/unknown lock, 0: shared, 1: exclusive. - */ -static int ESECT -mdb_env_excl_lock(MDB_env *env, int *excl) -{ - int rc = 0; -#ifdef _WIN32 - if (LockFile(env->me_lfd, 0, 0, 1, 0)) { - *excl = 1; - } else { - OVERLAPPED ov; - memset(&ov, 0, sizeof(ov)); - if (LockFileEx(env->me_lfd, 0, 0, 1, 0, &ov)) { - *excl = 0; - } else { - rc = ErrCode(); - } - } -#else - struct flock lock_info; - memset((void *)&lock_info, 0, sizeof(lock_info)); - lock_info.l_type = F_WRLCK; - lock_info.l_whence = SEEK_SET; - lock_info.l_start = 0; - lock_info.l_len = 1; - while ((rc = fcntl(env->me_lfd, F_SETLK, &lock_info)) && - (rc = ErrCode()) == EINTR) ; - if (!rc) { - *excl = 1; - } else -# ifdef MDB_USE_POSIX_SEM - if (*excl < 0) /* always true when !MDB_USE_POSIX_SEM */ -# endif - { - lock_info.l_type = F_RDLCK; - while ((rc = fcntl(env->me_lfd, F_SETLKW, &lock_info)) && - (rc = ErrCode()) == EINTR) ; - if (rc == 0) - *excl = 0; - } -#endif - return rc; -} - -#ifdef MDB_USE_HASH -/* - * hash_64 - 64 bit Fowler/Noll/Vo-0 FNV-1a hash code - * - * @(#) $Revision: 5.1 $ - * @(#) $Id: hash_64a.c,v 5.1 2009/06/30 09:01:38 chongo Exp $ - * @(#) $Source: /usr/local/src/cmd/fnv/RCS/hash_64a.c,v $ - * - * http://www.isthe.com/chongo/tech/comp/fnv/index.html - * - *** - * - * Please do not copyright this code. This code is in the public domain. - * - * LANDON CURT NOLL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, - * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO - * EVENT SHALL LANDON CURT NOLL BE LIABLE FOR ANY SPECIAL, INDIRECT OR - * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF - * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR - * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - * - * By: - * chongo /\oo/\ - * http://www.isthe.com/chongo/ - * - * Share and Enjoy! :-) - */ - -typedef unsigned long long mdb_hash_t; -#define MDB_HASH_INIT ((mdb_hash_t)0xcbf29ce484222325ULL) - -/** perform a 64 bit Fowler/Noll/Vo FNV-1a hash on a buffer - * @param[in] val value to hash - * @param[in] hval initial value for hash - * @return 64 bit hash - * - * NOTE: To use the recommended 64 bit FNV-1a hash, use MDB_HASH_INIT as the - * hval arg on the first call. - */ -static mdb_hash_t -mdb_hash_val(MDB_val *val, mdb_hash_t hval) -{ - unsigned char *s = (unsigned char *)val->mv_data; /* unsigned string */ - unsigned char *end = s + val->mv_size; - /* - * FNV-1a hash each octet of the string - */ - while (s < end) { - /* xor the bottom with the current octet */ - hval ^= (mdb_hash_t)*s++; - - /* multiply by the 64 bit FNV magic prime mod 2^64 */ - hval += (hval << 1) + (hval << 4) + (hval << 5) + - (hval << 7) + (hval << 8) + (hval << 40); - } - /* return our new hash value */ - return hval; -} - -/** Hash the string and output the encoded hash. - * This uses modified RFC1924 Ascii85 encoding to accommodate systems with - * very short name limits. We don't care about the encoding being reversible, - * we just want to preserve as many bits of the input as possible in a - * small printable string. - * @param[in] str string to hash - * @param[out] encbuf an array of 11 chars to hold the hash - */ -static const char mdb_a85[]= "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~"; - -static void -mdb_pack85(unsigned long l, char *out) -{ - int i; - - for (i=0; i<5; i++) { - *out++ = mdb_a85[l % 85]; - l /= 85; - } -} - -static void -mdb_hash_enc(MDB_val *val, char *encbuf) -{ - mdb_hash_t h = mdb_hash_val(val, MDB_HASH_INIT); - - mdb_pack85(h, encbuf); - mdb_pack85(h>>32, encbuf+5); - encbuf[10] = '\0'; -} -#endif - -/** Open and/or initialize the lock region for the environment. - * @param[in] env The LMDB environment. - * @param[in] lpath The pathname of the file used for the lock region. - * @param[in] mode The Unix permissions for the file, if we create it. - * @param[in,out] excl In -1, out lock type: -1 none, 0 shared, 1 exclusive - * @return 0 on success, non-zero on failure. - */ -static int ESECT -mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) -{ -#ifdef _WIN32 -# define MDB_ERRCODE_ROFS ERROR_WRITE_PROTECT -#else -# define MDB_ERRCODE_ROFS EROFS -#ifdef O_CLOEXEC /* Linux: Open file and set FD_CLOEXEC atomically */ -# define MDB_CLOEXEC O_CLOEXEC -#else - int fdflags; -# define MDB_CLOEXEC 0 -#endif -#endif - int rc; - off_t size, rsize; - -#ifdef _WIN32 - env->me_lfd = CreateFile(lpath, GENERIC_READ|GENERIC_WRITE, - FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, - FILE_ATTRIBUTE_NORMAL, NULL); -#else - env->me_lfd = open(lpath, O_RDWR|O_CREAT|MDB_CLOEXEC, mode); -#endif - if (env->me_lfd == INVALID_HANDLE_VALUE) { - rc = ErrCode(); - if (rc == MDB_ERRCODE_ROFS && (env->me_flags & MDB_RDONLY)) { - return MDB_SUCCESS; - } - goto fail_errno; - } -#if ! ((MDB_CLOEXEC) || defined(_WIN32)) - /* Lose record locks when exec*() */ - if ((fdflags = fcntl(env->me_lfd, F_GETFD) | FD_CLOEXEC) >= 0) - fcntl(env->me_lfd, F_SETFD, fdflags); -#endif - - if (!(env->me_flags & MDB_NOTLS)) { - rc = pthread_key_create(&env->me_txkey, mdb_env_reader_dest); - if (rc) - goto fail; - env->me_flags |= MDB_ENV_TXKEY; -#ifdef _WIN32 - /* Windows TLS callbacks need help finding their TLS info. */ - if (mdb_tls_nkeys >= MAX_TLS_KEYS) { - rc = MDB_TLS_FULL; - goto fail; - } - mdb_tls_keys[mdb_tls_nkeys++] = env->me_txkey; -#endif - } - - /* Try to get exclusive lock. If we succeed, then - * nobody is using the lock region and we should initialize it. - */ - if ((rc = mdb_env_excl_lock(env, excl))) goto fail; - -#ifdef _WIN32 - size = GetFileSize(env->me_lfd, NULL); -#else - size = lseek(env->me_lfd, 0, SEEK_END); - if (size == -1) goto fail_errno; -#endif - rsize = (env->me_maxreaders-1) * sizeof(MDB_reader) + sizeof(MDB_txninfo); - if (size < rsize && *excl > 0) { -#ifdef _WIN32 - if (SetFilePointer(env->me_lfd, rsize, NULL, FILE_BEGIN) != (DWORD)rsize - || !SetEndOfFile(env->me_lfd)) - goto fail_errno; -#else - if (ftruncate(env->me_lfd, rsize) != 0) goto fail_errno; -#endif - } else { - rsize = size; - size = rsize - sizeof(MDB_txninfo); - env->me_maxreaders = size/sizeof(MDB_reader) + 1; - } - { -#ifdef _WIN32 - HANDLE mh; - mh = CreateFileMapping(env->me_lfd, NULL, PAGE_READWRITE, - 0, 0, NULL); - if (!mh) goto fail_errno; - env->me_txns = MapViewOfFileEx(mh, FILE_MAP_WRITE, 0, 0, rsize, NULL); - CloseHandle(mh); - if (!env->me_txns) goto fail_errno; -#else - void *m = mmap(NULL, rsize, PROT_READ|PROT_WRITE, MAP_SHARED, - env->me_lfd, 0); - if (m == MAP_FAILED) goto fail_errno; - env->me_txns = m; -#endif - } - if (*excl > 0) { -#ifdef _WIN32 - BY_HANDLE_FILE_INFORMATION stbuf; - struct { - DWORD volume; - DWORD nhigh; - DWORD nlow; - } idbuf; - MDB_val val; - char encbuf[11]; - - if (!mdb_sec_inited) { - InitializeSecurityDescriptor(&mdb_null_sd, - SECURITY_DESCRIPTOR_REVISION); - SetSecurityDescriptorDacl(&mdb_null_sd, TRUE, 0, FALSE); - mdb_all_sa.nLength = sizeof(SECURITY_ATTRIBUTES); - mdb_all_sa.bInheritHandle = FALSE; - mdb_all_sa.lpSecurityDescriptor = &mdb_null_sd; - mdb_sec_inited = 1; - } - if (!GetFileInformationByHandle(env->me_lfd, &stbuf)) goto fail_errno; - idbuf.volume = stbuf.dwVolumeSerialNumber; - idbuf.nhigh = stbuf.nFileIndexHigh; - idbuf.nlow = stbuf.nFileIndexLow; - val.mv_data = &idbuf; - val.mv_size = sizeof(idbuf); - mdb_hash_enc(&val, encbuf); - sprintf(env->me_txns->mti_rmname, "Global\\MDBr%s", encbuf); - sprintf(env->me_txns->mti_wmname, "Global\\MDBw%s", encbuf); - env->me_rmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_rmname); - if (!env->me_rmutex) goto fail_errno; - env->me_wmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_wmname); - if (!env->me_wmutex) goto fail_errno; -#elif defined(MDB_USE_POSIX_SEM) - struct stat stbuf; - struct { - dev_t dev; - ino_t ino; - } idbuf; - MDB_val val; - char encbuf[11]; - -#if defined(__NetBSD__) -#define MDB_SHORT_SEMNAMES 1 /* limited to 14 chars */ -#endif - if (fstat(env->me_lfd, &stbuf)) goto fail_errno; - idbuf.dev = stbuf.st_dev; - idbuf.ino = stbuf.st_ino; - val.mv_data = &idbuf; - val.mv_size = sizeof(idbuf); - mdb_hash_enc(&val, encbuf); -#ifdef MDB_SHORT_SEMNAMES - encbuf[9] = '\0'; /* drop name from 15 chars to 14 chars */ -#endif - sprintf(env->me_txns->mti_rmname, "/MDBr%s", encbuf); - sprintf(env->me_txns->mti_wmname, "/MDBw%s", encbuf); - /* Clean up after a previous run, if needed: Try to - * remove both semaphores before doing anything else. - */ - sem_unlink(env->me_txns->mti_rmname); - sem_unlink(env->me_txns->mti_wmname); - env->me_rmutex = sem_open(env->me_txns->mti_rmname, - O_CREAT|O_EXCL, mode, 1); - if (env->me_rmutex == SEM_FAILED) goto fail_errno; - env->me_wmutex = sem_open(env->me_txns->mti_wmname, - O_CREAT|O_EXCL, mode, 1); - if (env->me_wmutex == SEM_FAILED) goto fail_errno; -#else /* MDB_USE_POSIX_SEM */ - pthread_mutexattr_t mattr; - - if ((rc = pthread_mutexattr_init(&mattr)) - || (rc = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED)) - || (rc = pthread_mutex_init(&env->me_txns->mti_mutex, &mattr)) - || (rc = pthread_mutex_init(&env->me_txns->mti_wmutex, &mattr))) - goto fail; - pthread_mutexattr_destroy(&mattr); -#endif /* _WIN32 || MDB_USE_POSIX_SEM */ - - env->me_txns->mti_magic = MDB_MAGIC; - env->me_txns->mti_format = MDB_LOCK_FORMAT; - env->me_txns->mti_txnid = 0; - env->me_txns->mti_numreaders = 0; - - } else { - if (env->me_txns->mti_magic != MDB_MAGIC) { - DPUTS("lock region has invalid magic"); - rc = MDB_INVALID; - goto fail; - } - if (env->me_txns->mti_format != MDB_LOCK_FORMAT) { - DPRINTF(("lock region has format+version 0x%x, expected 0x%x", - env->me_txns->mti_format, MDB_LOCK_FORMAT)); - rc = MDB_VERSION_MISMATCH; - goto fail; - } - rc = ErrCode(); - if (rc && rc != EACCES && rc != EAGAIN) { - goto fail; - } -#ifdef _WIN32 - env->me_rmutex = OpenMutex(SYNCHRONIZE, FALSE, env->me_txns->mti_rmname); - if (!env->me_rmutex) goto fail_errno; - env->me_wmutex = OpenMutex(SYNCHRONIZE, FALSE, env->me_txns->mti_wmname); - if (!env->me_wmutex) goto fail_errno; -#elif defined(MDB_USE_POSIX_SEM) - env->me_rmutex = sem_open(env->me_txns->mti_rmname, 0); - if (env->me_rmutex == SEM_FAILED) goto fail_errno; - env->me_wmutex = sem_open(env->me_txns->mti_wmname, 0); - if (env->me_wmutex == SEM_FAILED) goto fail_errno; -#endif - } - return MDB_SUCCESS; - -fail_errno: - rc = ErrCode(); -fail: - return rc; -} - - /** The name of the lock file in the DB environment */ -#define LOCKNAME "/lock.mdb" - /** The name of the data file in the DB environment */ -#define DATANAME "/data.mdb" - /** The suffix of the lock file when no subdir is used */ -#define LOCKSUFF "-lock" - /** Only a subset of the @ref mdb_env flags can be changed - * at runtime. Changing other flags requires closing the - * environment and re-opening it with the new flags. - */ -#define CHANGEABLE (MDB_NOSYNC|MDB_NOMETASYNC|MDB_MAPASYNC|MDB_NOMEMINIT) -#define CHANGELESS (MDB_FIXEDMAP|MDB_NOSUBDIR|MDB_RDONLY|MDB_WRITEMAP| \ - MDB_NOTLS|MDB_NOLOCK|MDB_NORDAHEAD) - -#if VALID_FLAGS & PERSISTENT_FLAGS & (CHANGEABLE|CHANGELESS) -# error "Persistent DB flags & env flags overlap, but both go in mm_flags" -#endif - -int ESECT -mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode) -{ - int oflags, rc, len, excl = -1; - char *lpath, *dpath; - - if (env->me_fd!=INVALID_HANDLE_VALUE || (flags & ~(CHANGEABLE|CHANGELESS))) - return EINVAL; - - len = strlen(path); - if (flags & MDB_NOSUBDIR) { - rc = len + sizeof(LOCKSUFF) + len + 1; - } else { - rc = len + sizeof(LOCKNAME) + len + sizeof(DATANAME); - } - lpath = malloc(rc); - if (!lpath) - return ENOMEM; - if (flags & MDB_NOSUBDIR) { - dpath = lpath + len + sizeof(LOCKSUFF); - sprintf(lpath, "%s" LOCKSUFF, path); - strcpy(dpath, path); - } else { - dpath = lpath + len + sizeof(LOCKNAME); - sprintf(lpath, "%s" LOCKNAME, path); - sprintf(dpath, "%s" DATANAME, path); - } - - rc = MDB_SUCCESS; - flags |= env->me_flags; - if (flags & MDB_RDONLY) { - /* silently ignore WRITEMAP when we're only getting read access */ - flags &= ~MDB_WRITEMAP; - } else { - if (!((env->me_free_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX)) && - (env->me_dirty_list = calloc(MDB_IDL_UM_SIZE, sizeof(MDB_ID2))))) - rc = ENOMEM; - } - env->me_flags = flags |= MDB_ENV_ACTIVE; - if (rc) - goto leave; - - env->me_path = strdup(path); - env->me_dbxs = calloc(env->me_maxdbs, sizeof(MDB_dbx)); - env->me_dbflags = calloc(env->me_maxdbs, sizeof(uint16_t)); - env->me_dbiseqs = calloc(env->me_maxdbs, sizeof(unsigned int)); - if (!(env->me_dbxs && env->me_path && env->me_dbflags && env->me_dbiseqs)) { - rc = ENOMEM; - goto leave; - } - - /* For RDONLY, get lockfile after we know datafile exists */ - if (!(flags & (MDB_RDONLY|MDB_NOLOCK))) { - rc = mdb_env_setup_locks(env, lpath, mode, &excl); - if (rc) - goto leave; - } - -#ifdef _WIN32 - if (F_ISSET(flags, MDB_RDONLY)) { - oflags = GENERIC_READ; - len = OPEN_EXISTING; - } else { - oflags = GENERIC_READ|GENERIC_WRITE; - len = OPEN_ALWAYS; - } - mode = FILE_ATTRIBUTE_NORMAL; - env->me_fd = CreateFile(dpath, oflags, FILE_SHARE_READ|FILE_SHARE_WRITE, - NULL, len, mode, NULL); -#else - if (F_ISSET(flags, MDB_RDONLY)) - oflags = O_RDONLY; - else - oflags = O_RDWR | O_CREAT; - - env->me_fd = open(dpath, oflags, mode); -#endif - if (env->me_fd == INVALID_HANDLE_VALUE) { - rc = ErrCode(); - goto leave; - } - - if ((flags & (MDB_RDONLY|MDB_NOLOCK)) == MDB_RDONLY) { - rc = mdb_env_setup_locks(env, lpath, mode, &excl); - if (rc) - goto leave; - } - - if ((rc = mdb_env_open2(env)) == MDB_SUCCESS) { - if (flags & (MDB_RDONLY|MDB_WRITEMAP)) { - env->me_mfd = env->me_fd; - } else { - /* Synchronous fd for meta writes. Needed even with - * MDB_NOSYNC/MDB_NOMETASYNC, in case these get reset. - */ -#ifdef _WIN32 - len = OPEN_EXISTING; - env->me_mfd = CreateFile(dpath, oflags, - FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, len, - mode | FILE_FLAG_WRITE_THROUGH, NULL); -#else - oflags &= ~O_CREAT; - env->me_mfd = open(dpath, oflags | MDB_DSYNC, mode); -#endif - if (env->me_mfd == INVALID_HANDLE_VALUE) { - rc = ErrCode(); - goto leave; - } - } - DPRINTF(("opened dbenv %p", (void *) env)); - if (excl > 0) { - rc = mdb_env_share_locks(env, &excl); - if (rc) - goto leave; - } - if (!((flags & MDB_RDONLY) || - (env->me_pbuf = calloc(1, env->me_psize)))) - rc = ENOMEM; - if (!(flags & MDB_RDONLY)) { - MDB_txn *txn; - int tsize = sizeof(MDB_txn), size = tsize + env->me_maxdbs * - (sizeof(MDB_db)+sizeof(MDB_cursor *)+sizeof(unsigned int)+1); - txn = calloc(1, size); - if (txn) { - txn->mt_dbs = (MDB_db *)((char *)txn + tsize); - txn->mt_cursors = (MDB_cursor **)(txn->mt_dbs + env->me_maxdbs); - txn->mt_dbiseqs = (unsigned int *)(txn->mt_cursors + env->me_maxdbs); - txn->mt_dbflags = (unsigned char *)(txn->mt_dbiseqs + env->me_maxdbs); - txn->mt_env = env; - txn->mt_dbxs = env->me_dbxs; - env->me_txn0 = txn; - } else { - rc = ENOMEM; - } - } - } - -leave: - if (rc) { - mdb_env_close0(env, excl); - } - free(lpath); - return rc; -} - -/** Destroy resources from mdb_env_open(), clear our readers & DBIs */ -static void ESECT -mdb_env_close0(MDB_env *env, int excl) -{ - int i; - - if (!(env->me_flags & MDB_ENV_ACTIVE)) - return; - - /* Doing this here since me_dbxs may not exist during mdb_env_close */ - if (env->me_dbxs) { - for (i = env->me_maxdbs; --i > MAIN_DBI; ) - free(env->me_dbxs[i].md_name.mv_data); - free(env->me_dbxs); - } - - free(env->me_pbuf); - free(env->me_dbiseqs); - free(env->me_dbflags); - free(env->me_path); - free(env->me_dirty_list); - free(env->me_txn0); - mdb_midl_free(env->me_free_pgs); - - if (env->me_flags & MDB_ENV_TXKEY) { - pthread_key_delete(env->me_txkey); -#ifdef _WIN32 - /* Delete our key from the global list */ - for (i=0; ime_txkey) { - mdb_tls_keys[i] = mdb_tls_keys[mdb_tls_nkeys-1]; - mdb_tls_nkeys--; - break; - } -#endif - } - - if (env->me_map) { - munmap(env->me_map, env->me_mapsize); - } - if (env->me_mfd != env->me_fd && env->me_mfd != INVALID_HANDLE_VALUE) - (void) close(env->me_mfd); - if (env->me_fd != INVALID_HANDLE_VALUE) - (void) close(env->me_fd); - if (env->me_txns) { - MDB_PID_T pid = env->me_pid; - /* Clearing readers is done in this function because - * me_txkey with its destructor must be disabled first. - */ - for (i = env->me_numreaders; --i >= 0; ) - if (env->me_txns->mti_readers[i].mr_pid == pid) - env->me_txns->mti_readers[i].mr_pid = 0; -#ifdef _WIN32 - if (env->me_rmutex) { - CloseHandle(env->me_rmutex); - if (env->me_wmutex) CloseHandle(env->me_wmutex); - } - /* Windows automatically destroys the mutexes when - * the last handle closes. - */ -#elif defined(MDB_USE_POSIX_SEM) - if (env->me_rmutex != SEM_FAILED) { - sem_close(env->me_rmutex); - if (env->me_wmutex != SEM_FAILED) - sem_close(env->me_wmutex); - /* If we have the filelock: If we are the - * only remaining user, clean up semaphores. - */ - if (excl == 0) - mdb_env_excl_lock(env, &excl); - if (excl > 0) { - sem_unlink(env->me_txns->mti_rmname); - sem_unlink(env->me_txns->mti_wmname); - } - } -#endif - munmap((void *)env->me_txns, (env->me_maxreaders-1)*sizeof(MDB_reader)+sizeof(MDB_txninfo)); - } - if (env->me_lfd != INVALID_HANDLE_VALUE) { -#ifdef _WIN32 - if (excl >= 0) { - /* Unlock the lockfile. Windows would have unlocked it - * after closing anyway, but not necessarily at once. - */ - UnlockFile(env->me_lfd, 0, 0, 1, 0); - } -#endif - (void) close(env->me_lfd); - } - - env->me_flags &= ~(MDB_ENV_ACTIVE|MDB_ENV_TXKEY); -} - - -void ESECT -mdb_env_close(MDB_env *env) -{ - MDB_page *dp; - - if (env == NULL) - return; - - VGMEMP_DESTROY(env); - while ((dp = env->me_dpages) != NULL) { - VGMEMP_DEFINED(&dp->mp_next, sizeof(dp->mp_next)); - env->me_dpages = dp->mp_next; - free(dp); - } - - mdb_env_close0(env, 0); - free(env); -} - -/** Compare two items pointing at aligned size_t's */ -static int -mdb_cmp_long(const MDB_val *a, const MDB_val *b) -{ - return (*(size_t *)a->mv_data < *(size_t *)b->mv_data) ? -1 : - *(size_t *)a->mv_data > *(size_t *)b->mv_data; -} - -/** Compare two items pointing at aligned unsigned int's. - * - * This is also set as #MDB_INTEGERDUP|#MDB_DUPFIXED's #MDB_dbx.%md_dcmp, - * but #mdb_cmp_clong() is called instead if the data type is size_t. - */ -static int -mdb_cmp_int(const MDB_val *a, const MDB_val *b) -{ - return (*(unsigned int *)a->mv_data < *(unsigned int *)b->mv_data) ? -1 : - *(unsigned int *)a->mv_data > *(unsigned int *)b->mv_data; -} - -/** Compare two items pointing at unsigned ints of unknown alignment. - * Nodes and keys are guaranteed to be 2-byte aligned. - */ -static int -mdb_cmp_cint(const MDB_val *a, const MDB_val *b) -{ -#if BYTE_ORDER == LITTLE_ENDIAN - unsigned short *u, *c; - int x; - - u = (unsigned short *) ((char *) a->mv_data + a->mv_size); - c = (unsigned short *) ((char *) b->mv_data + a->mv_size); - do { - x = *--u - *--c; - } while(!x && u > (unsigned short *)a->mv_data); - return x; -#else - unsigned short *u, *c, *end; - int x; - - end = (unsigned short *) ((char *) a->mv_data + a->mv_size); - u = (unsigned short *)a->mv_data; - c = (unsigned short *)b->mv_data; - do { - x = *u++ - *c++; - } while(!x && u < end); - return x; -#endif -} - -/** Compare two items lexically */ -static int -mdb_cmp_memn(const MDB_val *a, const MDB_val *b) -{ - int diff; - ssize_t len_diff; - unsigned int len; - - len = a->mv_size; - len_diff = (ssize_t) a->mv_size - (ssize_t) b->mv_size; - if (len_diff > 0) { - len = b->mv_size; - len_diff = 1; - } - - diff = memcmp(a->mv_data, b->mv_data, len); - return diff ? diff : len_diff<0 ? -1 : len_diff; -} - -/** Compare two items in reverse byte order */ -static int -mdb_cmp_memnr(const MDB_val *a, const MDB_val *b) -{ - const unsigned char *p1, *p2, *p1_lim; - ssize_t len_diff; - int diff; - - p1_lim = (const unsigned char *)a->mv_data; - p1 = (const unsigned char *)a->mv_data + a->mv_size; - p2 = (const unsigned char *)b->mv_data + b->mv_size; - - len_diff = (ssize_t) a->mv_size - (ssize_t) b->mv_size; - if (len_diff > 0) { - p1_lim += len_diff; - len_diff = 1; - } - - while (p1 > p1_lim) { - diff = *--p1 - *--p2; - if (diff) - return diff; - } - return len_diff<0 ? -1 : len_diff; -} - -/** Search for key within a page, using binary search. - * Returns the smallest entry larger or equal to the key. - * If exactp is non-null, stores whether the found entry was an exact match - * in *exactp (1 or 0). - * Updates the cursor index with the index of the found entry. - * If no entry larger or equal to the key is found, returns NULL. - */ -static MDB_node * -mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp) -{ - unsigned int i = 0, nkeys; - int low, high; - int rc = 0; - MDB_page *mp = mc->mc_pg[mc->mc_top]; - MDB_node *node = NULL; - MDB_val nodekey; - MDB_cmp_func *cmp; - DKBUF; - - nkeys = NUMKEYS(mp); - - DPRINTF(("searching %u keys in %s %spage %"Z"u", - nkeys, IS_LEAF(mp) ? "leaf" : "branch", IS_SUBP(mp) ? "sub-" : "", - mdb_dbg_pgno(mp))); - - low = IS_LEAF(mp) ? 0 : 1; - high = nkeys - 1; - cmp = mc->mc_dbx->md_cmp; - - /* Branch pages have no data, so if using integer keys, - * alignment is guaranteed. Use faster mdb_cmp_int. - */ - if (cmp == mdb_cmp_cint && IS_BRANCH(mp)) { - if (NODEPTR(mp, 1)->mn_ksize == sizeof(size_t)) - cmp = mdb_cmp_long; - else - cmp = mdb_cmp_int; - } - - if (IS_LEAF2(mp)) { - nodekey.mv_size = mc->mc_db->md_pad; - node = NODEPTR(mp, 0); /* fake */ - while (low <= high) { - i = (low + high) >> 1; - nodekey.mv_data = LEAF2KEY(mp, i, nodekey.mv_size); - rc = cmp(key, &nodekey); - DPRINTF(("found leaf index %u [%s], rc = %i", - i, DKEY(&nodekey), rc)); - if (rc == 0) - break; - if (rc > 0) - low = i + 1; - else - high = i - 1; - } - } else { - while (low <= high) { - i = (low + high) >> 1; - - node = NODEPTR(mp, i); - nodekey.mv_size = NODEKSZ(node); - nodekey.mv_data = NODEKEY(node); - - rc = cmp(key, &nodekey); -#if MDB_DEBUG - if (IS_LEAF(mp)) - DPRINTF(("found leaf index %u [%s], rc = %i", - i, DKEY(&nodekey), rc)); - else - DPRINTF(("found branch index %u [%s -> %"Z"u], rc = %i", - i, DKEY(&nodekey), NODEPGNO(node), rc)); -#endif - if (rc == 0) - break; - if (rc > 0) - low = i + 1; - else - high = i - 1; - } - } - - if (rc > 0) { /* Found entry is less than the key. */ - i++; /* Skip to get the smallest entry larger than key. */ - if (!IS_LEAF2(mp)) - node = NODEPTR(mp, i); - } - if (exactp) - *exactp = (rc == 0 && nkeys > 0); - /* store the key index */ - mc->mc_ki[mc->mc_top] = i; - if (i >= nkeys) - /* There is no entry larger or equal to the key. */ - return NULL; - - /* nodeptr is fake for LEAF2 */ - return node; -} - -#if 0 -static void -mdb_cursor_adjust(MDB_cursor *mc, func) -{ - MDB_cursor *m2; - - for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) { - if (m2->mc_pg[m2->mc_top] == mc->mc_pg[mc->mc_top]) { - func(mc, m2); - } - } -} -#endif - -/** Pop a page off the top of the cursor's stack. */ -static void -mdb_cursor_pop(MDB_cursor *mc) -{ - if (mc->mc_snum) { -#if MDB_DEBUG - MDB_page *top = mc->mc_pg[mc->mc_top]; -#endif - mc->mc_snum--; - if (mc->mc_snum) - mc->mc_top--; - - DPRINTF(("popped page %"Z"u off db %d cursor %p", top->mp_pgno, - DDBI(mc), (void *) mc)); - } -} - -/** Push a page onto the top of the cursor's stack. */ -static int -mdb_cursor_push(MDB_cursor *mc, MDB_page *mp) -{ - DPRINTF(("pushing page %"Z"u on db %d cursor %p", mp->mp_pgno, - DDBI(mc), (void *) mc)); - - if (mc->mc_snum >= CURSOR_STACK) { - mc->mc_txn->mt_flags |= MDB_TXN_ERROR; - return MDB_CURSOR_FULL; - } - - mc->mc_top = mc->mc_snum++; - mc->mc_pg[mc->mc_top] = mp; - mc->mc_ki[mc->mc_top] = 0; - - return MDB_SUCCESS; -} - -/** Find the address of the page corresponding to a given page number. - * @param[in] txn the transaction for this access. - * @param[in] pgno the page number for the page to retrieve. - * @param[out] ret address of a pointer where the page's address will be stored. - * @param[out] lvl dirty_list inheritance level of found page. 1=current txn, 0=mapped page. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_get(MDB_txn *txn, pgno_t pgno, MDB_page **ret, int *lvl) -{ - MDB_env *env = txn->mt_env; - MDB_page *p = NULL; - int level; - - if (!((txn->mt_flags & MDB_TXN_RDONLY) | (env->me_flags & MDB_WRITEMAP))) { - MDB_txn *tx2 = txn; - level = 1; - do { - MDB_ID2L dl = tx2->mt_u.dirty_list; - unsigned x; - /* Spilled pages were dirtied in this txn and flushed - * because the dirty list got full. Bring this page - * back in from the map (but don't unspill it here, - * leave that unless page_touch happens again). - */ - if (tx2->mt_spill_pgs) { - MDB_ID pn = pgno << 1; - x = mdb_midl_search(tx2->mt_spill_pgs, pn); - if (x <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[x] == pn) { - p = (MDB_page *)(env->me_map + env->me_psize * pgno); - goto done; - } - } - if (dl[0].mid) { - unsigned x = mdb_mid2l_search(dl, pgno); - if (x <= dl[0].mid && dl[x].mid == pgno) { - p = dl[x].mptr; - goto done; - } - } - level++; - } while ((tx2 = tx2->mt_parent) != NULL); - } - - if (pgno < txn->mt_next_pgno) { - level = 0; - p = (MDB_page *)(env->me_map + env->me_psize * pgno); - } else { - DPRINTF(("page %"Z"u not found", pgno)); - txn->mt_flags |= MDB_TXN_ERROR; - return MDB_PAGE_NOTFOUND; - } - -done: - *ret = p; - if (lvl) - *lvl = level; - return MDB_SUCCESS; -} - -/** Finish #mdb_page_search() / #mdb_page_search_lowest(). - * The cursor is at the root page, set up the rest of it. - */ -static int -mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int flags) -{ - MDB_page *mp = mc->mc_pg[mc->mc_top]; - int rc; - DKBUF; - - while (IS_BRANCH(mp)) { - MDB_node *node; - indx_t i; - - DPRINTF(("branch page %"Z"u has %u keys", mp->mp_pgno, NUMKEYS(mp))); - mdb_cassert(mc, NUMKEYS(mp) > 1); - DPRINTF(("found index 0 to page %"Z"u", NODEPGNO(NODEPTR(mp, 0)))); - - if (flags & (MDB_PS_FIRST|MDB_PS_LAST)) { - i = 0; - if (flags & MDB_PS_LAST) - i = NUMKEYS(mp) - 1; - } else { - int exact; - node = mdb_node_search(mc, key, &exact); - if (node == NULL) - i = NUMKEYS(mp) - 1; - else { - i = mc->mc_ki[mc->mc_top]; - if (!exact) { - mdb_cassert(mc, i > 0); - i--; - } - } - DPRINTF(("following index %u for key [%s]", i, DKEY(key))); - } - - mdb_cassert(mc, i < NUMKEYS(mp)); - node = NODEPTR(mp, i); - - if ((rc = mdb_page_get(mc->mc_txn, NODEPGNO(node), &mp, NULL)) != 0) - return rc; - - mc->mc_ki[mc->mc_top] = i; - if ((rc = mdb_cursor_push(mc, mp))) - return rc; - - if (flags & MDB_PS_MODIFY) { - if ((rc = mdb_page_touch(mc)) != 0) - return rc; - mp = mc->mc_pg[mc->mc_top]; - } - } - - if (!IS_LEAF(mp)) { - DPRINTF(("internal error, index points to a %02X page!?", - mp->mp_flags)); - mc->mc_txn->mt_flags |= MDB_TXN_ERROR; - return MDB_CORRUPTED; - } - - DPRINTF(("found leaf page %"Z"u for key [%s]", mp->mp_pgno, - key ? DKEY(key) : "null")); - mc->mc_flags |= C_INITIALIZED; - mc->mc_flags &= ~C_EOF; - - return MDB_SUCCESS; -} - -/** Search for the lowest key under the current branch page. - * This just bypasses a NUMKEYS check in the current page - * before calling mdb_page_search_root(), because the callers - * are all in situations where the current page is known to - * be underfilled. - */ -static int -mdb_page_search_lowest(MDB_cursor *mc) -{ - MDB_page *mp = mc->mc_pg[mc->mc_top]; - MDB_node *node = NODEPTR(mp, 0); - int rc; - - if ((rc = mdb_page_get(mc->mc_txn, NODEPGNO(node), &mp, NULL)) != 0) - return rc; - - mc->mc_ki[mc->mc_top] = 0; - if ((rc = mdb_cursor_push(mc, mp))) - return rc; - return mdb_page_search_root(mc, NULL, MDB_PS_FIRST); -} - -/** Search for the page a given key should be in. - * Push it and its parent pages on the cursor stack. - * @param[in,out] mc the cursor for this operation. - * @param[in] key the key to search for, or NULL for first/last page. - * @param[in] flags If MDB_PS_MODIFY is set, visited pages in the DB - * are touched (updated with new page numbers). - * If MDB_PS_FIRST or MDB_PS_LAST is set, find first or last leaf. - * This is used by #mdb_cursor_first() and #mdb_cursor_last(). - * If MDB_PS_ROOTONLY set, just fetch root node, no further lookups. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_search(MDB_cursor *mc, MDB_val *key, int flags) -{ - int rc; - pgno_t root; - - /* Make sure the txn is still viable, then find the root from - * the txn's db table and set it as the root of the cursor's stack. - */ - if (F_ISSET(mc->mc_txn->mt_flags, MDB_TXN_ERROR)) { - DPUTS("transaction has failed, must abort"); - return MDB_BAD_TXN; - } else { - /* Make sure we're using an up-to-date root */ - if (*mc->mc_dbflag & DB_STALE) { - MDB_cursor mc2; - if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi)) - return MDB_BAD_DBI; - mdb_cursor_init(&mc2, mc->mc_txn, MAIN_DBI, NULL); - rc = mdb_page_search(&mc2, &mc->mc_dbx->md_name, 0); - if (rc) - return rc; - { - MDB_val data; - int exact = 0; - uint16_t flags; - MDB_node *leaf = mdb_node_search(&mc2, - &mc->mc_dbx->md_name, &exact); - if (!exact) - return MDB_NOTFOUND; - rc = mdb_node_read(mc->mc_txn, leaf, &data); - if (rc) - return rc; - memcpy(&flags, ((char *) data.mv_data + offsetof(MDB_db, md_flags)), - sizeof(uint16_t)); - /* The txn may not know this DBI, or another process may - * have dropped and recreated the DB with other flags. - */ - if ((mc->mc_db->md_flags & PERSISTENT_FLAGS) != flags) - return MDB_INCOMPATIBLE; - memcpy(mc->mc_db, data.mv_data, sizeof(MDB_db)); - } - *mc->mc_dbflag &= ~DB_STALE; - } - root = mc->mc_db->md_root; - - if (root == P_INVALID) { /* Tree is empty. */ - DPUTS("tree is empty"); - return MDB_NOTFOUND; - } - } - - mdb_cassert(mc, root > 1); - if (!mc->mc_pg[0] || mc->mc_pg[0]->mp_pgno != root) - if ((rc = mdb_page_get(mc->mc_txn, root, &mc->mc_pg[0], NULL)) != 0) - return rc; - - mc->mc_snum = 1; - mc->mc_top = 0; - - DPRINTF(("db %d root page %"Z"u has flags 0x%X", - DDBI(mc), root, mc->mc_pg[0]->mp_flags)); - - if (flags & MDB_PS_MODIFY) { - if ((rc = mdb_page_touch(mc))) - return rc; - } - - if (flags & MDB_PS_ROOTONLY) - return MDB_SUCCESS; - - return mdb_page_search_root(mc, key, flags); -} - -static int -mdb_ovpage_free(MDB_cursor *mc, MDB_page *mp) -{ - MDB_txn *txn = mc->mc_txn; - pgno_t pg = mp->mp_pgno; - unsigned x = 0, ovpages = mp->mp_pages; - MDB_env *env = txn->mt_env; - MDB_IDL sl = txn->mt_spill_pgs; - MDB_ID pn = pg << 1; - int rc; - - DPRINTF(("free ov page %"Z"u (%d)", pg, ovpages)); - /* If the page is dirty or on the spill list we just acquired it, - * so we should give it back to our current free list, if any. - * Otherwise put it onto the list of pages we freed in this txn. - * - * Won't create me_pghead: me_pglast must be inited along with it. - * Unsupported in nested txns: They would need to hide the page - * range in ancestor txns' dirty and spilled lists. - */ - if (env->me_pghead && - !txn->mt_parent && - ((mp->mp_flags & P_DIRTY) || - (sl && (x = mdb_midl_search(sl, pn)) <= sl[0] && sl[x] == pn))) - { - unsigned i, j; - pgno_t *mop; - MDB_ID2 *dl, ix, iy; - rc = mdb_midl_need(&env->me_pghead, ovpages); - if (rc) - return rc; - if (!(mp->mp_flags & P_DIRTY)) { - /* This page is no longer spilled */ - if (x == sl[0]) - sl[0]--; - else - sl[x] |= 1; - goto release; - } - /* Remove from dirty list */ - dl = txn->mt_u.dirty_list; - x = dl[0].mid--; - for (ix = dl[x]; ix.mptr != mp; ix = iy) { - if (x > 1) { - x--; - iy = dl[x]; - dl[x] = ix; - } else { - mdb_cassert(mc, x > 1); - j = ++(dl[0].mid); - dl[j] = ix; /* Unsorted. OK when MDB_TXN_ERROR. */ - txn->mt_flags |= MDB_TXN_ERROR; - return MDB_CORRUPTED; - } - } - if (!(env->me_flags & MDB_WRITEMAP)) - mdb_dpage_free(env, mp); -release: - /* Insert in me_pghead */ - mop = env->me_pghead; - j = mop[0] + ovpages; - for (i = mop[0]; i && mop[i] < pg; i--) - mop[j--] = mop[i]; - while (j>i) - mop[j--] = pg++; - mop[0] += ovpages; - } else { - rc = mdb_midl_append_range(&txn->mt_free_pgs, pg, ovpages); - if (rc) - return rc; - } - mc->mc_db->md_overflow_pages -= ovpages; - return 0; -} - -/** Return the data associated with a given node. - * @param[in] txn The transaction for this operation. - * @param[in] leaf The node being read. - * @param[out] data Updated to point to the node's data. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_node_read(MDB_txn *txn, MDB_node *leaf, MDB_val *data) -{ - MDB_page *omp; /* overflow page */ - pgno_t pgno; - int rc; - - if (!F_ISSET(leaf->mn_flags, F_BIGDATA)) { - data->mv_size = NODEDSZ(leaf); - data->mv_data = NODEDATA(leaf); - return MDB_SUCCESS; - } - - /* Read overflow data. - */ - data->mv_size = NODEDSZ(leaf); - memcpy(&pgno, NODEDATA(leaf), sizeof(pgno)); - if ((rc = mdb_page_get(txn, pgno, &omp, NULL)) != 0) { - DPRINTF(("read overflow page %"Z"u failed", pgno)); - return rc; - } - data->mv_data = METADATA(omp); - - return MDB_SUCCESS; -} - -int -mdb_get(MDB_txn *txn, MDB_dbi dbi, - MDB_val *key, MDB_val *data) -{ - MDB_cursor mc; - MDB_xcursor mx; - int exact = 0; - DKBUF; - - DPRINTF(("===> get db %u key [%s]", dbi, DKEY(key))); - - if (!key || !data || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - if (txn->mt_flags & MDB_TXN_ERROR) - return MDB_BAD_TXN; - - mdb_cursor_init(&mc, txn, dbi, &mx); - return mdb_cursor_set(&mc, key, data, MDB_SET, &exact); -} - -/** Find a sibling for a page. - * Replaces the page at the top of the cursor's stack with the - * specified sibling, if one exists. - * @param[in] mc The cursor for this operation. - * @param[in] move_right Non-zero if the right sibling is requested, - * otherwise the left sibling. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_cursor_sibling(MDB_cursor *mc, int move_right) -{ - int rc; - MDB_node *indx; - MDB_page *mp; - - if (mc->mc_snum < 2) { - return MDB_NOTFOUND; /* root has no siblings */ - } - - mdb_cursor_pop(mc); - DPRINTF(("parent page is page %"Z"u, index %u", - mc->mc_pg[mc->mc_top]->mp_pgno, mc->mc_ki[mc->mc_top])); - - if (move_right ? (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mc->mc_pg[mc->mc_top])) - : (mc->mc_ki[mc->mc_top] == 0)) { - DPRINTF(("no more keys left, moving to %s sibling", - move_right ? "right" : "left")); - if ((rc = mdb_cursor_sibling(mc, move_right)) != MDB_SUCCESS) { - /* undo cursor_pop before returning */ - mc->mc_top++; - mc->mc_snum++; - return rc; - } - } else { - if (move_right) - mc->mc_ki[mc->mc_top]++; - else - mc->mc_ki[mc->mc_top]--; - DPRINTF(("just moving to %s index key %u", - move_right ? "right" : "left", mc->mc_ki[mc->mc_top])); - } - mdb_cassert(mc, IS_BRANCH(mc->mc_pg[mc->mc_top])); - - indx = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if ((rc = mdb_page_get(mc->mc_txn, NODEPGNO(indx), &mp, NULL)) != 0) { - /* mc will be inconsistent if caller does mc_snum++ as above */ - mc->mc_flags &= ~(C_INITIALIZED|C_EOF); - return rc; - } - - mdb_cursor_push(mc, mp); - if (!move_right) - mc->mc_ki[mc->mc_top] = NUMKEYS(mp)-1; - - return MDB_SUCCESS; -} - -/** Move the cursor to the next data item. */ -static int -mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) -{ - MDB_page *mp; - MDB_node *leaf; - int rc; - - if (mc->mc_flags & C_EOF) { - return MDB_NOTFOUND; - } - - mdb_cassert(mc, mc->mc_flags & C_INITIALIZED); - - mp = mc->mc_pg[mc->mc_top]; - - if (mc->mc_db->md_flags & MDB_DUPSORT) { - leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - if (op == MDB_NEXT || op == MDB_NEXT_DUP) { - rc = mdb_cursor_next(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_NEXT); - if (op != MDB_NEXT || rc != MDB_NOTFOUND) { - if (rc == MDB_SUCCESS) - MDB_GET_KEY(leaf, key); - return rc; - } - } - } else { - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); - if (op == MDB_NEXT_DUP) - return MDB_NOTFOUND; - } - } - - DPRINTF(("cursor_next: top page is %"Z"u in cursor %p", - mdb_dbg_pgno(mp), (void *) mc)); - if (mc->mc_flags & C_DEL) - goto skip; - - if (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mp)) { - DPUTS("=====> move to next sibling page"); - if ((rc = mdb_cursor_sibling(mc, 1)) != MDB_SUCCESS) { - mc->mc_flags |= C_EOF; - return rc; - } - mp = mc->mc_pg[mc->mc_top]; - DPRINTF(("next page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top])); - } else - mc->mc_ki[mc->mc_top]++; - -skip: - DPRINTF(("==> cursor points to page %"Z"u with %u keys, key index %u", - mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top])); - - if (IS_LEAF2(mp)) { - key->mv_size = mc->mc_db->md_pad; - key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size); - return MDB_SUCCESS; - } - - mdb_cassert(mc, IS_LEAF(mp)); - leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - mdb_xcursor_init1(mc, leaf); - } - if (data) { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) - return rc; - - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - rc = mdb_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - if (rc != MDB_SUCCESS) - return rc; - } - } - - MDB_GET_KEY(leaf, key); - return MDB_SUCCESS; -} - -/** Move the cursor to the previous data item. */ -static int -mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op) -{ - MDB_page *mp; - MDB_node *leaf; - int rc; - - mdb_cassert(mc, mc->mc_flags & C_INITIALIZED); - - mp = mc->mc_pg[mc->mc_top]; - - if (mc->mc_db->md_flags & MDB_DUPSORT) { - leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - if (op == MDB_PREV || op == MDB_PREV_DUP) { - rc = mdb_cursor_prev(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_PREV); - if (op != MDB_PREV || rc != MDB_NOTFOUND) { - if (rc == MDB_SUCCESS) { - MDB_GET_KEY(leaf, key); - mc->mc_flags &= ~C_EOF; - } - return rc; - } - } - } else { - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); - if (op == MDB_PREV_DUP) - return MDB_NOTFOUND; - } - } - - DPRINTF(("cursor_prev: top page is %"Z"u in cursor %p", - mdb_dbg_pgno(mp), (void *) mc)); - - if (mc->mc_ki[mc->mc_top] == 0) { - DPUTS("=====> move to prev sibling page"); - if ((rc = mdb_cursor_sibling(mc, 0)) != MDB_SUCCESS) { - return rc; - } - mp = mc->mc_pg[mc->mc_top]; - mc->mc_ki[mc->mc_top] = NUMKEYS(mp) - 1; - DPRINTF(("prev page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top])); - } else - mc->mc_ki[mc->mc_top]--; - - mc->mc_flags &= ~C_EOF; - - DPRINTF(("==> cursor points to page %"Z"u with %u keys, key index %u", - mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top])); - - if (IS_LEAF2(mp)) { - key->mv_size = mc->mc_db->md_pad; - key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size); - return MDB_SUCCESS; - } - - mdb_cassert(mc, IS_LEAF(mp)); - leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - mdb_xcursor_init1(mc, leaf); - } - if (data) { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) - return rc; - - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - rc = mdb_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL); - if (rc != MDB_SUCCESS) - return rc; - } - } - - MDB_GET_KEY(leaf, key); - return MDB_SUCCESS; -} - -/** Set the cursor on a specific data item. */ -static int -mdb_cursor_set(MDB_cursor *mc, MDB_val *key, MDB_val *data, - MDB_cursor_op op, int *exactp) -{ - int rc; - MDB_page *mp; - MDB_node *leaf = NULL; - DKBUF; - - if (key->mv_size == 0) - return MDB_BAD_VALSIZE; - - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); - - /* See if we're already on the right page */ - if (mc->mc_flags & C_INITIALIZED) { - MDB_val nodekey; - - mp = mc->mc_pg[mc->mc_top]; - if (!NUMKEYS(mp)) { - mc->mc_ki[mc->mc_top] = 0; - return MDB_NOTFOUND; - } - if (mp->mp_flags & P_LEAF2) { - nodekey.mv_size = mc->mc_db->md_pad; - nodekey.mv_data = LEAF2KEY(mp, 0, nodekey.mv_size); - } else { - leaf = NODEPTR(mp, 0); - MDB_GET_KEY2(leaf, nodekey); - } - rc = mc->mc_dbx->md_cmp(key, &nodekey); - if (rc == 0) { - /* Probably happens rarely, but first node on the page - * was the one we wanted. - */ - mc->mc_ki[mc->mc_top] = 0; - if (exactp) - *exactp = 1; - goto set1; - } - if (rc > 0) { - unsigned int i; - unsigned int nkeys = NUMKEYS(mp); - if (nkeys > 1) { - if (mp->mp_flags & P_LEAF2) { - nodekey.mv_data = LEAF2KEY(mp, - nkeys-1, nodekey.mv_size); - } else { - leaf = NODEPTR(mp, nkeys-1); - MDB_GET_KEY2(leaf, nodekey); - } - rc = mc->mc_dbx->md_cmp(key, &nodekey); - if (rc == 0) { - /* last node was the one we wanted */ - mc->mc_ki[mc->mc_top] = nkeys-1; - if (exactp) - *exactp = 1; - goto set1; - } - if (rc < 0) { - if (mc->mc_ki[mc->mc_top] < NUMKEYS(mp)) { - /* This is definitely the right page, skip search_page */ - if (mp->mp_flags & P_LEAF2) { - nodekey.mv_data = LEAF2KEY(mp, - mc->mc_ki[mc->mc_top], nodekey.mv_size); - } else { - leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - MDB_GET_KEY2(leaf, nodekey); - } - rc = mc->mc_dbx->md_cmp(key, &nodekey); - if (rc == 0) { - /* current node was the one we wanted */ - if (exactp) - *exactp = 1; - goto set1; - } - } - rc = 0; - goto set2; - } - } - /* If any parents have right-sibs, search. - * Otherwise, there's nothing further. - */ - for (i=0; imc_top; i++) - if (mc->mc_ki[i] < - NUMKEYS(mc->mc_pg[i])-1) - break; - if (i == mc->mc_top) { - /* There are no other pages */ - mc->mc_ki[mc->mc_top] = nkeys; - return MDB_NOTFOUND; - } - } - if (!mc->mc_top) { - /* There are no other pages */ - mc->mc_ki[mc->mc_top] = 0; - if (op == MDB_SET_RANGE && !exactp) { - rc = 0; - goto set1; - } else - return MDB_NOTFOUND; - } - } - - rc = mdb_page_search(mc, key, 0); - if (rc != MDB_SUCCESS) - return rc; - - mp = mc->mc_pg[mc->mc_top]; - mdb_cassert(mc, IS_LEAF(mp)); - -set2: - leaf = mdb_node_search(mc, key, exactp); - if (exactp != NULL && !*exactp) { - /* MDB_SET specified and not an exact match. */ - return MDB_NOTFOUND; - } - - if (leaf == NULL) { - DPUTS("===> inexact leaf not found, goto sibling"); - if ((rc = mdb_cursor_sibling(mc, 1)) != MDB_SUCCESS) - return rc; /* no entries matched */ - mp = mc->mc_pg[mc->mc_top]; - mdb_cassert(mc, IS_LEAF(mp)); - leaf = NODEPTR(mp, 0); - } - -set1: - mc->mc_flags |= C_INITIALIZED; - mc->mc_flags &= ~C_EOF; - - if (IS_LEAF2(mp)) { - if (op == MDB_SET_RANGE || op == MDB_SET_KEY) { - key->mv_size = mc->mc_db->md_pad; - key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size); - } - return MDB_SUCCESS; - } - - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - mdb_xcursor_init1(mc, leaf); - } - if (data) { - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - if (op == MDB_SET || op == MDB_SET_KEY || op == MDB_SET_RANGE) { - rc = mdb_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - } else { - int ex2, *ex2p; - if (op == MDB_GET_BOTH) { - ex2p = &ex2; - ex2 = 0; - } else { - ex2p = NULL; - } - rc = mdb_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_SET_RANGE, ex2p); - if (rc != MDB_SUCCESS) - return rc; - } - } else if (op == MDB_GET_BOTH || op == MDB_GET_BOTH_RANGE) { - MDB_val olddata; - MDB_cmp_func *dcmp; - if ((rc = mdb_node_read(mc->mc_txn, leaf, &olddata)) != MDB_SUCCESS) - return rc; - dcmp = mc->mc_dbx->md_dcmp; -#if UINT_MAX < SIZE_MAX - if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(size_t)) - dcmp = mdb_cmp_clong; -#endif - rc = dcmp(data, &olddata); - if (rc) { - if (op == MDB_GET_BOTH || rc > 0) - return MDB_NOTFOUND; - rc = 0; - *data = olddata; - } - - } else { - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) - return rc; - } - } - - /* The key already matches in all other cases */ - if (op == MDB_SET_RANGE || op == MDB_SET_KEY) - MDB_GET_KEY(leaf, key); - DPRINTF(("==> cursor placed on key [%s]", DKEY(key))); - - return rc; -} - -/** Move the cursor to the first item in the database. */ -static int -mdb_cursor_first(MDB_cursor *mc, MDB_val *key, MDB_val *data) -{ - int rc; - MDB_node *leaf; - - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); - - if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { - rc = mdb_page_search(mc, NULL, MDB_PS_FIRST); - if (rc != MDB_SUCCESS) - return rc; - } - mdb_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); - - leaf = NODEPTR(mc->mc_pg[mc->mc_top], 0); - mc->mc_flags |= C_INITIALIZED; - mc->mc_flags &= ~C_EOF; - - mc->mc_ki[mc->mc_top] = 0; - - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { - key->mv_size = mc->mc_db->md_pad; - key->mv_data = LEAF2KEY(mc->mc_pg[mc->mc_top], 0, key->mv_size); - return MDB_SUCCESS; - } - - if (data) { - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - mdb_xcursor_init1(mc, leaf); - rc = mdb_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - if (rc) - return rc; - } else { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) - return rc; - } - } - MDB_GET_KEY(leaf, key); - return MDB_SUCCESS; -} - -/** Move the cursor to the last item in the database. */ -static int -mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data) -{ - int rc; - MDB_node *leaf; - - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF); - - if (!(mc->mc_flags & C_EOF)) { - - if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { - rc = mdb_page_search(mc, NULL, MDB_PS_LAST); - if (rc != MDB_SUCCESS) - return rc; - } - mdb_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); - - } - mc->mc_ki[mc->mc_top] = NUMKEYS(mc->mc_pg[mc->mc_top]) - 1; - mc->mc_flags |= C_INITIALIZED|C_EOF; - leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { - key->mv_size = mc->mc_db->md_pad; - key->mv_data = LEAF2KEY(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], key->mv_size); - return MDB_SUCCESS; - } - - if (data) { - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - mdb_xcursor_init1(mc, leaf); - rc = mdb_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL); - if (rc) - return rc; - } else { - if ((rc = mdb_node_read(mc->mc_txn, leaf, data)) != MDB_SUCCESS) - return rc; - } - } - - MDB_GET_KEY(leaf, key); - return MDB_SUCCESS; -} - -int -mdb_cursor_get(MDB_cursor *mc, MDB_val *key, MDB_val *data, - MDB_cursor_op op) -{ - int rc; - int exact = 0; - int (*mfunc)(MDB_cursor *mc, MDB_val *key, MDB_val *data); - - if (mc == NULL) - return EINVAL; - - if (mc->mc_txn->mt_flags & MDB_TXN_ERROR) - return MDB_BAD_TXN; - - switch (op) { - case MDB_GET_CURRENT: - if (!(mc->mc_flags & C_INITIALIZED)) { - rc = EINVAL; - } else { - MDB_page *mp = mc->mc_pg[mc->mc_top]; - int nkeys = NUMKEYS(mp); - if (!nkeys || mc->mc_ki[mc->mc_top] >= nkeys) { - mc->mc_ki[mc->mc_top] = nkeys; - rc = MDB_NOTFOUND; - break; - } - rc = MDB_SUCCESS; - if (IS_LEAF2(mp)) { - key->mv_size = mc->mc_db->md_pad; - key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size); - } else { - MDB_node *leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - MDB_GET_KEY(leaf, key); - if (data) { - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - if (mc->mc_flags & C_DEL) - mdb_xcursor_init1(mc, leaf); - rc = mdb_cursor_get(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_GET_CURRENT); - } else { - rc = mdb_node_read(mc->mc_txn, leaf, data); - } - } - } - } - break; - case MDB_GET_BOTH: - case MDB_GET_BOTH_RANGE: - if (data == NULL) { - rc = EINVAL; - break; - } - if (mc->mc_xcursor == NULL) { - rc = MDB_INCOMPATIBLE; - break; - } - /* FALLTHRU */ - case MDB_SET: - case MDB_SET_KEY: - case MDB_SET_RANGE: - if (key == NULL) { - rc = EINVAL; - } else { - rc = mdb_cursor_set(mc, key, data, op, - op == MDB_SET_RANGE ? NULL : &exact); - } - break; - case MDB_GET_MULTIPLE: - if (data == NULL || !(mc->mc_flags & C_INITIALIZED)) { - rc = EINVAL; - break; - } - if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) { - rc = MDB_INCOMPATIBLE; - break; - } - rc = MDB_SUCCESS; - if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) || - (mc->mc_xcursor->mx_cursor.mc_flags & C_EOF)) - break; - goto fetchm; - case MDB_NEXT_MULTIPLE: - if (data == NULL) { - rc = EINVAL; - break; - } - if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) { - rc = MDB_INCOMPATIBLE; - break; - } - if (!(mc->mc_flags & C_INITIALIZED)) - rc = mdb_cursor_first(mc, key, data); - else - rc = mdb_cursor_next(mc, key, data, MDB_NEXT_DUP); - if (rc == MDB_SUCCESS) { - if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { - MDB_cursor *mx; -fetchm: - mx = &mc->mc_xcursor->mx_cursor; - data->mv_size = NUMKEYS(mx->mc_pg[mx->mc_top]) * - mx->mc_db->md_pad; - data->mv_data = METADATA(mx->mc_pg[mx->mc_top]); - mx->mc_ki[mx->mc_top] = NUMKEYS(mx->mc_pg[mx->mc_top])-1; - } else { - rc = MDB_NOTFOUND; - } - } - break; - case MDB_NEXT: - case MDB_NEXT_DUP: - case MDB_NEXT_NODUP: - if (!(mc->mc_flags & C_INITIALIZED)) - rc = mdb_cursor_first(mc, key, data); - else - rc = mdb_cursor_next(mc, key, data, op); - break; - case MDB_PREV: - case MDB_PREV_DUP: - case MDB_PREV_NODUP: - if (!(mc->mc_flags & C_INITIALIZED)) { - rc = mdb_cursor_last(mc, key, data); - if (rc) - break; - mc->mc_flags |= C_INITIALIZED; - mc->mc_ki[mc->mc_top]++; - } - rc = mdb_cursor_prev(mc, key, data, op); - break; - case MDB_FIRST: - rc = mdb_cursor_first(mc, key, data); - break; - case MDB_FIRST_DUP: - mfunc = mdb_cursor_first; - mmove: - if (data == NULL || !(mc->mc_flags & C_INITIALIZED)) { - rc = EINVAL; - break; - } - if (mc->mc_xcursor == NULL) { - rc = MDB_INCOMPATIBLE; - break; - } - { - MDB_node *leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) { - MDB_GET_KEY(leaf, key); - rc = mdb_node_read(mc->mc_txn, leaf, data); - break; - } - } - if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) { - rc = EINVAL; - break; - } - rc = mfunc(&mc->mc_xcursor->mx_cursor, data, NULL); - break; - case MDB_LAST: - rc = mdb_cursor_last(mc, key, data); - break; - case MDB_LAST_DUP: - mfunc = mdb_cursor_last; - goto mmove; - default: - DPRINTF(("unhandled/unimplemented cursor operation %u", op)); - rc = EINVAL; - break; - } - - if (mc->mc_flags & C_DEL) - mc->mc_flags ^= C_DEL; - - return rc; -} - -/** Touch all the pages in the cursor stack. Set mc_top. - * Makes sure all the pages are writable, before attempting a write operation. - * @param[in] mc The cursor to operate on. - */ -static int -mdb_cursor_touch(MDB_cursor *mc) -{ - int rc = MDB_SUCCESS; - - if (mc->mc_dbi > MAIN_DBI && !(*mc->mc_dbflag & DB_DIRTY)) { - MDB_cursor mc2; - MDB_xcursor mcx; - if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi)) - return MDB_BAD_DBI; - mdb_cursor_init(&mc2, mc->mc_txn, MAIN_DBI, &mcx); - rc = mdb_page_search(&mc2, &mc->mc_dbx->md_name, MDB_PS_MODIFY); - if (rc) - return rc; - *mc->mc_dbflag |= DB_DIRTY; - } - mc->mc_top = 0; - if (mc->mc_snum) { - do { - rc = mdb_page_touch(mc); - } while (!rc && ++(mc->mc_top) < mc->mc_snum); - mc->mc_top = mc->mc_snum-1; - } - return rc; -} - -/** Do not spill pages to disk if txn is getting full, may fail instead */ -#define MDB_NOSPILL 0x8000 - -int -mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data, - unsigned int flags) -{ - enum { MDB_NO_ROOT = MDB_LAST_ERRCODE+10 }; /* internal code */ - MDB_env *env; - MDB_node *leaf = NULL; - MDB_page *fp, *mp; - uint16_t fp_flags; - MDB_val xdata, *rdata, dkey, olddata; - MDB_db dummy; - int do_sub = 0, insert_key, insert_data; - unsigned int mcount = 0, dcount = 0, nospill; - size_t nsize; - int rc, rc2; - unsigned int nflags; - DKBUF; - - if (mc == NULL || key == NULL) - return EINVAL; - - env = mc->mc_txn->mt_env; - - /* Check this first so counter will always be zero on any - * early failures. - */ - if (flags & MDB_MULTIPLE) { - dcount = data[1].mv_size; - data[1].mv_size = 0; - if (!F_ISSET(mc->mc_db->md_flags, MDB_DUPFIXED)) - return MDB_INCOMPATIBLE; - } - - nospill = flags & MDB_NOSPILL; - flags &= ~MDB_NOSPILL; - - if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) - return (mc->mc_txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN; - - if (key->mv_size-1 >= ENV_MAXKEY(env)) - return MDB_BAD_VALSIZE; - -#if SIZE_MAX > MAXDATASIZE - if (data->mv_size > ((mc->mc_db->md_flags & MDB_DUPSORT) ? ENV_MAXKEY(env) : MAXDATASIZE)) - return MDB_BAD_VALSIZE; -#else - if ((mc->mc_db->md_flags & MDB_DUPSORT) && data->mv_size > ENV_MAXKEY(env)) - return MDB_BAD_VALSIZE; -#endif - - DPRINTF(("==> put db %d key [%s], size %"Z"u, data size %"Z"u", - DDBI(mc), DKEY(key), key ? key->mv_size : 0, data->mv_size)); - - dkey.mv_size = 0; - - if (flags == MDB_CURRENT) { - if (!(mc->mc_flags & C_INITIALIZED)) - return EINVAL; - rc = MDB_SUCCESS; - } else if (mc->mc_db->md_root == P_INVALID) { - /* new database, cursor has nothing to point to */ - mc->mc_snum = 0; - mc->mc_top = 0; - mc->mc_flags &= ~C_INITIALIZED; - rc = MDB_NO_ROOT; - } else { - int exact = 0; - MDB_val d2; - if (flags & MDB_APPEND) { - MDB_val k2; - rc = mdb_cursor_last(mc, &k2, &d2); - if (rc == 0) { - rc = mc->mc_dbx->md_cmp(key, &k2); - if (rc > 0) { - rc = MDB_NOTFOUND; - mc->mc_ki[mc->mc_top]++; - } else { - /* new key is <= last key */ - rc = MDB_KEYEXIST; - } - } - } else { - rc = mdb_cursor_set(mc, key, &d2, MDB_SET, &exact); - } - if ((flags & MDB_NOOVERWRITE) && rc == 0) { - DPRINTF(("duplicate key [%s]", DKEY(key))); - *data = d2; - return MDB_KEYEXIST; - } - if (rc && rc != MDB_NOTFOUND) - return rc; - } - - if (mc->mc_flags & C_DEL) - mc->mc_flags ^= C_DEL; - - /* Cursor is positioned, check for room in the dirty list */ - if (!nospill) { - if (flags & MDB_MULTIPLE) { - rdata = &xdata; - xdata.mv_size = data->mv_size * dcount; - } else { - rdata = data; - } - if ((rc2 = mdb_page_spill(mc, key, rdata))) - return rc2; - } - - if (rc == MDB_NO_ROOT) { - MDB_page *np; - /* new database, write a root leaf page */ - DPUTS("allocating new root leaf page"); - if ((rc2 = mdb_page_new(mc, P_LEAF, 1, &np))) { - return rc2; - } - mdb_cursor_push(mc, np); - mc->mc_db->md_root = np->mp_pgno; - mc->mc_db->md_depth++; - *mc->mc_dbflag |= DB_DIRTY; - if ((mc->mc_db->md_flags & (MDB_DUPSORT|MDB_DUPFIXED)) - == MDB_DUPFIXED) - np->mp_flags |= P_LEAF2; - mc->mc_flags |= C_INITIALIZED; - } else { - /* make sure all cursor pages are writable */ - rc2 = mdb_cursor_touch(mc); - if (rc2) - return rc2; - } - - insert_key = insert_data = rc; - if (insert_key) { - /* The key does not exist */ - DPRINTF(("inserting key at index %i", mc->mc_ki[mc->mc_top])); - if ((mc->mc_db->md_flags & MDB_DUPSORT) && - LEAFSIZE(key, data) > env->me_nodemax) - { - /* Too big for a node, insert in sub-DB. Set up an empty - * "old sub-page" for prep_subDB to expand to a full page. - */ - fp_flags = P_LEAF|P_DIRTY; - fp = env->me_pbuf; - fp->mp_pad = data->mv_size; /* used if MDB_DUPFIXED */ - fp->mp_lower = fp->mp_upper = (PAGEHDRSZ-PAGEBASE); - olddata.mv_size = PAGEHDRSZ; - goto prep_subDB; - } - } else { - /* there's only a key anyway, so this is a no-op */ - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { - char *ptr; - unsigned int ksize = mc->mc_db->md_pad; - if (key->mv_size != ksize) - return MDB_BAD_VALSIZE; - ptr = LEAF2KEY(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], ksize); - memcpy(ptr, key->mv_data, ksize); -fix_parent: - /* if overwriting slot 0 of leaf, need to - * update branch key if there is a parent page - */ - if (mc->mc_top && !mc->mc_ki[mc->mc_top]) { - unsigned short top = mc->mc_top; - mc->mc_top--; - /* slot 0 is always an empty key, find real slot */ - while (mc->mc_top && !mc->mc_ki[mc->mc_top]) - mc->mc_top--; - if (mc->mc_ki[mc->mc_top]) - rc2 = mdb_update_key(mc, key); - else - rc2 = MDB_SUCCESS; - mc->mc_top = top; - if (rc2) - return rc2; - } - return MDB_SUCCESS; - } - -more: - leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - olddata.mv_size = NODEDSZ(leaf); - olddata.mv_data = NODEDATA(leaf); - - /* DB has dups? */ - if (F_ISSET(mc->mc_db->md_flags, MDB_DUPSORT)) { - /* Prepare (sub-)page/sub-DB to accept the new item, - * if needed. fp: old sub-page or a header faking - * it. mp: new (sub-)page. offset: growth in page - * size. xdata: node data with new page or DB. - */ - unsigned i, offset = 0; - mp = fp = xdata.mv_data = env->me_pbuf; - mp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno; - - /* Was a single item before, must convert now */ - if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) { - MDB_cmp_func *dcmp; - /* Just overwrite the current item */ - if (flags == MDB_CURRENT) - goto current; - dcmp = mc->mc_dbx->md_dcmp; -#if UINT_MAX < SIZE_MAX - if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(size_t)) - dcmp = mdb_cmp_clong; -#endif - /* does data match? */ - if (!dcmp(data, &olddata)) { - if (flags & MDB_NODUPDATA) - return MDB_KEYEXIST; - /* overwrite it */ - goto current; - } - - /* Back up original data item */ - dkey.mv_size = olddata.mv_size; - dkey.mv_data = memcpy(fp+1, olddata.mv_data, olddata.mv_size); - - /* Make sub-page header for the dup items, with dummy body */ - fp->mp_flags = P_LEAF|P_DIRTY|P_SUBP; - fp->mp_lower = (PAGEHDRSZ-PAGEBASE); - xdata.mv_size = PAGEHDRSZ + dkey.mv_size + data->mv_size; - if (mc->mc_db->md_flags & MDB_DUPFIXED) { - fp->mp_flags |= P_LEAF2; - fp->mp_pad = data->mv_size; - xdata.mv_size += 2 * data->mv_size; /* leave space for 2 more */ - } else { - xdata.mv_size += 2 * (sizeof(indx_t) + NODESIZE) + - (dkey.mv_size & 1) + (data->mv_size & 1); - } - fp->mp_upper = xdata.mv_size - PAGEBASE; - olddata.mv_size = xdata.mv_size; /* pretend olddata is fp */ - } else if (leaf->mn_flags & F_SUBDATA) { - /* Data is on sub-DB, just store it */ - flags |= F_DUPDATA|F_SUBDATA; - goto put_sub; - } else { - /* Data is on sub-page */ - fp = olddata.mv_data; - switch (flags) { - default: - if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) { - offset = EVEN(NODESIZE + sizeof(indx_t) + - data->mv_size); - break; - } - offset = fp->mp_pad; - if (SIZELEFT(fp) < offset) { - offset *= 4; /* space for 4 more */ - break; - } - /* FALLTHRU: Big enough MDB_DUPFIXED sub-page */ - case MDB_CURRENT: - fp->mp_flags |= P_DIRTY; - COPY_PGNO(fp->mp_pgno, mp->mp_pgno); - mc->mc_xcursor->mx_cursor.mc_pg[0] = fp; - flags |= F_DUPDATA; - goto put_sub; - } - xdata.mv_size = olddata.mv_size + offset; - } - - fp_flags = fp->mp_flags; - if (NODESIZE + NODEKSZ(leaf) + xdata.mv_size > env->me_nodemax) { - /* Too big for a sub-page, convert to sub-DB */ - fp_flags &= ~P_SUBP; -prep_subDB: - if (mc->mc_db->md_flags & MDB_DUPFIXED) { - fp_flags |= P_LEAF2; - dummy.md_pad = fp->mp_pad; - dummy.md_flags = MDB_DUPFIXED; - if (mc->mc_db->md_flags & MDB_INTEGERDUP) - dummy.md_flags |= MDB_INTEGERKEY; - } else { - dummy.md_pad = 0; - dummy.md_flags = 0; - } - dummy.md_depth = 1; - dummy.md_branch_pages = 0; - dummy.md_leaf_pages = 1; - dummy.md_overflow_pages = 0; - dummy.md_entries = NUMKEYS(fp); - xdata.mv_size = sizeof(MDB_db); - xdata.mv_data = &dummy; - if ((rc = mdb_page_alloc(mc, 1, &mp))) - return rc; - offset = env->me_psize - olddata.mv_size; - flags |= F_DUPDATA|F_SUBDATA; - dummy.md_root = mp->mp_pgno; - } - if (mp != fp) { - mp->mp_flags = fp_flags | P_DIRTY; - mp->mp_pad = fp->mp_pad; - mp->mp_lower = fp->mp_lower; - mp->mp_upper = fp->mp_upper + offset; - if (fp_flags & P_LEAF2) { - memcpy(METADATA(mp), METADATA(fp), NUMKEYS(fp) * fp->mp_pad); - } else { - memcpy((char *)mp + mp->mp_upper + PAGEBASE, (char *)fp + fp->mp_upper + PAGEBASE, - olddata.mv_size - fp->mp_upper - PAGEBASE); - for (i=0; imp_ptrs[i] = fp->mp_ptrs[i] + offset; - } - } - - rdata = &xdata; - flags |= F_DUPDATA; - do_sub = 1; - if (!insert_key) - mdb_node_del(mc, 0); - goto new_sub; - } -current: - /* overflow page overwrites need special handling */ - if (F_ISSET(leaf->mn_flags, F_BIGDATA)) { - MDB_page *omp; - pgno_t pg; - int level, ovpages, dpages = OVPAGES(data->mv_size, env->me_psize); - - memcpy(&pg, olddata.mv_data, sizeof(pg)); - if ((rc2 = mdb_page_get(mc->mc_txn, pg, &omp, &level)) != 0) - return rc2; - ovpages = omp->mp_pages; - - /* Is the ov page large enough? */ - if (ovpages >= dpages) { - if (!(omp->mp_flags & P_DIRTY) && - (level || (env->me_flags & MDB_WRITEMAP))) - { - rc = mdb_page_unspill(mc->mc_txn, omp, &omp); - if (rc) - return rc; - level = 0; /* dirty in this txn or clean */ - } - /* Is it dirty? */ - if (omp->mp_flags & P_DIRTY) { - /* yes, overwrite it. Note in this case we don't - * bother to try shrinking the page if the new data - * is smaller than the overflow threshold. - */ - if (level > 1) { - /* It is writable only in a parent txn */ - size_t sz = (size_t) env->me_psize * ovpages, off; - MDB_page *np = mdb_page_malloc(mc->mc_txn, ovpages); - MDB_ID2 id2; - if (!np) - return ENOMEM; - id2.mid = pg; - id2.mptr = np; - rc2 = mdb_mid2l_insert(mc->mc_txn->mt_u.dirty_list, &id2); - mdb_cassert(mc, rc2 == 0); - if (!(flags & MDB_RESERVE)) { - /* Copy end of page, adjusting alignment so - * compiler may copy words instead of bytes. - */ - off = (PAGEHDRSZ + data->mv_size) & -sizeof(size_t); - memcpy((size_t *)((char *)np + off), - (size_t *)((char *)omp + off), sz - off); - sz = PAGEHDRSZ; - } - memcpy(np, omp, sz); /* Copy beginning of page */ - omp = np; - } - SETDSZ(leaf, data->mv_size); - if (F_ISSET(flags, MDB_RESERVE)) - data->mv_data = METADATA(omp); - else - memcpy(METADATA(omp), data->mv_data, data->mv_size); - return MDB_SUCCESS; - } - } - if ((rc2 = mdb_ovpage_free(mc, omp)) != MDB_SUCCESS) - return rc2; - } else if (data->mv_size == olddata.mv_size) { - /* same size, just replace it. Note that we could - * also reuse this node if the new data is smaller, - * but instead we opt to shrink the node in that case. - */ - if (F_ISSET(flags, MDB_RESERVE)) - data->mv_data = olddata.mv_data; - else if (!(mc->mc_flags & C_SUB)) - memcpy(olddata.mv_data, data->mv_data, data->mv_size); - else { - memcpy(NODEKEY(leaf), key->mv_data, key->mv_size); - goto fix_parent; - } - return MDB_SUCCESS; - } - mdb_node_del(mc, 0); - } - - rdata = data; - -new_sub: - nflags = flags & NODE_ADD_FLAGS; - nsize = IS_LEAF2(mc->mc_pg[mc->mc_top]) ? key->mv_size : mdb_leaf_size(env, key, rdata); - if (SIZELEFT(mc->mc_pg[mc->mc_top]) < nsize) { - if (( flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA ) - nflags &= ~MDB_APPEND; /* sub-page may need room to grow */ - if (!insert_key) - nflags |= MDB_SPLIT_REPLACE; - rc = mdb_page_split(mc, key, rdata, P_INVALID, nflags); - } else { - /* There is room already in this leaf page. */ - rc = mdb_node_add(mc, mc->mc_ki[mc->mc_top], key, rdata, 0, nflags); - if (rc == 0 && insert_key) { - /* Adjust other cursors pointing to mp */ - MDB_cursor *m2, *m3; - MDB_dbi dbi = mc->mc_dbi; - unsigned i = mc->mc_top; - MDB_page *mp = mc->mc_pg[i]; - - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { - if (mc->mc_flags & C_SUB) - m3 = &m2->mc_xcursor->mx_cursor; - else - m3 = m2; - if (m3 == mc || m3->mc_snum < mc->mc_snum) continue; - if (m3->mc_pg[i] == mp && m3->mc_ki[i] >= mc->mc_ki[i]) { - m3->mc_ki[i]++; - } - } - } - } - - if (rc == MDB_SUCCESS) { - /* Now store the actual data in the child DB. Note that we're - * storing the user data in the keys field, so there are strict - * size limits on dupdata. The actual data fields of the child - * DB are all zero size. - */ - if (do_sub) { - int xflags; - size_t ecount; -put_sub: - xdata.mv_size = 0; - xdata.mv_data = ""; - leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (flags & MDB_CURRENT) { - xflags = MDB_CURRENT|MDB_NOSPILL; - } else { - mdb_xcursor_init1(mc, leaf); - xflags = (flags & MDB_NODUPDATA) ? - MDB_NOOVERWRITE|MDB_NOSPILL : MDB_NOSPILL; - } - /* converted, write the original data first */ - if (dkey.mv_size) { - rc = mdb_cursor_put(&mc->mc_xcursor->mx_cursor, &dkey, &xdata, xflags); - if (rc) - goto bad_sub; - { - /* Adjust other cursors pointing to mp */ - MDB_cursor *m2; - unsigned i = mc->mc_top; - MDB_page *mp = mc->mc_pg[i]; - - for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) { - if (m2 == mc || m2->mc_snum < mc->mc_snum) continue; - if (!(m2->mc_flags & C_INITIALIZED)) continue; - if (m2->mc_pg[i] == mp && m2->mc_ki[i] == mc->mc_ki[i]) { - mdb_xcursor_init1(m2, leaf); - } - } - } - /* we've done our job */ - dkey.mv_size = 0; - } - ecount = mc->mc_xcursor->mx_db.md_entries; - if (flags & MDB_APPENDDUP) - xflags |= MDB_APPEND; - rc = mdb_cursor_put(&mc->mc_xcursor->mx_cursor, data, &xdata, xflags); - if (flags & F_SUBDATA) { - void *db = NODEDATA(leaf); - memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDB_db)); - } - insert_data = mc->mc_xcursor->mx_db.md_entries - ecount; - } - /* Increment count unless we just replaced an existing item. */ - if (insert_data) - mc->mc_db->md_entries++; - if (insert_key) { - /* Invalidate txn if we created an empty sub-DB */ - if (rc) - goto bad_sub; - /* If we succeeded and the key didn't exist before, - * make sure the cursor is marked valid. - */ - mc->mc_flags |= C_INITIALIZED; - } - if (flags & MDB_MULTIPLE) { - if (!rc) { - mcount++; - /* let caller know how many succeeded, if any */ - data[1].mv_size = mcount; - if (mcount < dcount) { - data[0].mv_data = (char *)data[0].mv_data + data[0].mv_size; - insert_key = insert_data = 0; - goto more; - } - } - } - return rc; -bad_sub: - if (rc == MDB_KEYEXIST) /* should not happen, we deleted that item */ - rc = MDB_CORRUPTED; - } - mc->mc_txn->mt_flags |= MDB_TXN_ERROR; - return rc; -} - -int -mdb_cursor_del(MDB_cursor *mc, unsigned int flags) -{ - MDB_node *leaf; - MDB_page *mp; - int rc; - - if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) - return (mc->mc_txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN; - - if (!(mc->mc_flags & C_INITIALIZED)) - return EINVAL; - - if (mc->mc_ki[mc->mc_top] >= NUMKEYS(mc->mc_pg[mc->mc_top])) - return MDB_NOTFOUND; - - if (!(flags & MDB_NOSPILL) && (rc = mdb_page_spill(mc, NULL, NULL))) - return rc; - - rc = mdb_cursor_touch(mc); - if (rc) - return rc; - - mp = mc->mc_pg[mc->mc_top]; - if (IS_LEAF2(mp)) - goto del_key; - leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - - if (F_ISSET(leaf->mn_flags, F_DUPDATA)) { - if (flags & MDB_NODUPDATA) { - /* mdb_cursor_del0() will subtract the final entry */ - mc->mc_db->md_entries -= mc->mc_xcursor->mx_db.md_entries - 1; - } else { - if (!F_ISSET(leaf->mn_flags, F_SUBDATA)) { - mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); - } - rc = mdb_cursor_del(&mc->mc_xcursor->mx_cursor, MDB_NOSPILL); - if (rc) - return rc; - /* If sub-DB still has entries, we're done */ - if (mc->mc_xcursor->mx_db.md_entries) { - if (leaf->mn_flags & F_SUBDATA) { - /* update subDB info */ - void *db = NODEDATA(leaf); - memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDB_db)); - } else { - MDB_cursor *m2; - /* shrink fake page */ - mdb_node_shrink(mp, mc->mc_ki[mc->mc_top]); - leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); - /* fix other sub-DB cursors pointed at this fake page */ - for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) { - if (m2 == mc || m2->mc_snum < mc->mc_snum) continue; - if (m2->mc_pg[mc->mc_top] == mp && - m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top]) - m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf); - } - } - mc->mc_db->md_entries--; - mc->mc_flags |= C_DEL; - return rc; - } - /* otherwise fall thru and delete the sub-DB */ - } - - if (leaf->mn_flags & F_SUBDATA) { - /* add all the child DB's pages to the free list */ - rc = mdb_drop0(&mc->mc_xcursor->mx_cursor, 0); - if (rc) - goto fail; - } - } - - /* add overflow pages to free list */ - if (F_ISSET(leaf->mn_flags, F_BIGDATA)) { - MDB_page *omp; - pgno_t pg; - - memcpy(&pg, NODEDATA(leaf), sizeof(pg)); - if ((rc = mdb_page_get(mc->mc_txn, pg, &omp, NULL)) || - (rc = mdb_ovpage_free(mc, omp))) - goto fail; - } - -del_key: - return mdb_cursor_del0(mc); - -fail: - mc->mc_txn->mt_flags |= MDB_TXN_ERROR; - return rc; -} - -/** Allocate and initialize new pages for a database. - * @param[in] mc a cursor on the database being added to. - * @param[in] flags flags defining what type of page is being allocated. - * @param[in] num the number of pages to allocate. This is usually 1, - * unless allocating overflow pages for a large record. - * @param[out] mp Address of a page, or NULL on failure. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_new(MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp) -{ - MDB_page *np; - int rc; - - if ((rc = mdb_page_alloc(mc, num, &np))) - return rc; - DPRINTF(("allocated new mpage %"Z"u, page size %u", - np->mp_pgno, mc->mc_txn->mt_env->me_psize)); - np->mp_flags = flags | P_DIRTY; - np->mp_lower = (PAGEHDRSZ-PAGEBASE); - np->mp_upper = mc->mc_txn->mt_env->me_psize - PAGEBASE; - - if (IS_BRANCH(np)) - mc->mc_db->md_branch_pages++; - else if (IS_LEAF(np)) - mc->mc_db->md_leaf_pages++; - else if (IS_OVERFLOW(np)) { - mc->mc_db->md_overflow_pages += num; - np->mp_pages = num; - } - *mp = np; - - return 0; -} - -/** Calculate the size of a leaf node. - * The size depends on the environment's page size; if a data item - * is too large it will be put onto an overflow page and the node - * size will only include the key and not the data. Sizes are always - * rounded up to an even number of bytes, to guarantee 2-byte alignment - * of the #MDB_node headers. - * @param[in] env The environment handle. - * @param[in] key The key for the node. - * @param[in] data The data for the node. - * @return The number of bytes needed to store the node. - */ -static size_t -mdb_leaf_size(MDB_env *env, MDB_val *key, MDB_val *data) -{ - size_t sz; - - sz = LEAFSIZE(key, data); - if (sz > env->me_nodemax) { - /* put on overflow page */ - sz -= data->mv_size - sizeof(pgno_t); - } - - return EVEN(sz + sizeof(indx_t)); -} - -/** Calculate the size of a branch node. - * The size should depend on the environment's page size but since - * we currently don't support spilling large keys onto overflow - * pages, it's simply the size of the #MDB_node header plus the - * size of the key. Sizes are always rounded up to an even number - * of bytes, to guarantee 2-byte alignment of the #MDB_node headers. - * @param[in] env The environment handle. - * @param[in] key The key for the node. - * @return The number of bytes needed to store the node. - */ -static size_t -mdb_branch_size(MDB_env *env, MDB_val *key) -{ - size_t sz; - - sz = INDXSIZE(key); - if (sz > env->me_nodemax) { - /* put on overflow page */ - /* not implemented */ - /* sz -= key->size - sizeof(pgno_t); */ - } - - return sz + sizeof(indx_t); -} - -/** Add a node to the page pointed to by the cursor. - * @param[in] mc The cursor for this operation. - * @param[in] indx The index on the page where the new node should be added. - * @param[in] key The key for the new node. - * @param[in] data The data for the new node, if any. - * @param[in] pgno The page number, if adding a branch node. - * @param[in] flags Flags for the node. - * @return 0 on success, non-zero on failure. Possible errors are: - *
      - *
    • ENOMEM - failed to allocate overflow pages for the node. - *
    • MDB_PAGE_FULL - there is insufficient room in the page. This error - * should never happen since all callers already calculate the - * page's free space before calling this function. - *
    - */ -static int -mdb_node_add(MDB_cursor *mc, indx_t indx, - MDB_val *key, MDB_val *data, pgno_t pgno, unsigned int flags) -{ - unsigned int i; - size_t node_size = NODESIZE; - ssize_t room; - indx_t ofs; - MDB_node *node; - MDB_page *mp = mc->mc_pg[mc->mc_top]; - MDB_page *ofp = NULL; /* overflow page */ - DKBUF; - - mdb_cassert(mc, mp->mp_upper >= mp->mp_lower); - - DPRINTF(("add to %s %spage %"Z"u index %i, data size %"Z"u key size %"Z"u [%s]", - IS_LEAF(mp) ? "leaf" : "branch", - IS_SUBP(mp) ? "sub-" : "", - mdb_dbg_pgno(mp), indx, data ? data->mv_size : 0, - key ? key->mv_size : 0, key ? DKEY(key) : "null")); - - if (IS_LEAF2(mp)) { - /* Move higher keys up one slot. */ - int ksize = mc->mc_db->md_pad, dif; - char *ptr = LEAF2KEY(mp, indx, ksize); - dif = NUMKEYS(mp) - indx; - if (dif > 0) - memmove(ptr+ksize, ptr, dif*ksize); - /* insert new key */ - memcpy(ptr, key->mv_data, ksize); - - /* Just using these for counting */ - mp->mp_lower += sizeof(indx_t); - mp->mp_upper -= ksize - sizeof(indx_t); - return MDB_SUCCESS; - } - - room = (ssize_t)SIZELEFT(mp) - (ssize_t)sizeof(indx_t); - if (key != NULL) - node_size += key->mv_size; - if (IS_LEAF(mp)) { - mdb_cassert(mc, data); - if (F_ISSET(flags, F_BIGDATA)) { - /* Data already on overflow page. */ - node_size += sizeof(pgno_t); - } else if (node_size + data->mv_size > mc->mc_txn->mt_env->me_nodemax) { - int ovpages = OVPAGES(data->mv_size, mc->mc_txn->mt_env->me_psize); - int rc; - /* Put data on overflow page. */ - DPRINTF(("data size is %"Z"u, node would be %"Z"u, put data on overflow page", - data->mv_size, node_size+data->mv_size)); - node_size = EVEN(node_size + sizeof(pgno_t)); - if ((ssize_t)node_size > room) - goto full; - if ((rc = mdb_page_new(mc, P_OVERFLOW, ovpages, &ofp))) - return rc; - DPRINTF(("allocated overflow page %"Z"u", ofp->mp_pgno)); - flags |= F_BIGDATA; - goto update; - } else { - node_size += data->mv_size; - } - } - node_size = EVEN(node_size); - if ((ssize_t)node_size > room) - goto full; - -update: - /* Move higher pointers up one slot. */ - for (i = NUMKEYS(mp); i > indx; i--) - mp->mp_ptrs[i] = mp->mp_ptrs[i - 1]; - - /* Adjust free space offsets. */ - ofs = mp->mp_upper - node_size; - mdb_cassert(mc, ofs >= mp->mp_lower + sizeof(indx_t)); - mp->mp_ptrs[indx] = ofs; - mp->mp_upper = ofs; - mp->mp_lower += sizeof(indx_t); - - /* Write the node data. */ - node = NODEPTR(mp, indx); - node->mn_ksize = (key == NULL) ? 0 : key->mv_size; - node->mn_flags = flags; - if (IS_LEAF(mp)) - SETDSZ(node,data->mv_size); - else - SETPGNO(node,pgno); - - if (key) - memcpy(NODEKEY(node), key->mv_data, key->mv_size); - - if (IS_LEAF(mp)) { - mdb_cassert(mc, key); - if (ofp == NULL) { - if (F_ISSET(flags, F_BIGDATA)) - memcpy(node->mn_data + key->mv_size, data->mv_data, - sizeof(pgno_t)); - else if (F_ISSET(flags, MDB_RESERVE)) - data->mv_data = node->mn_data + key->mv_size; - else - memcpy(node->mn_data + key->mv_size, data->mv_data, - data->mv_size); - } else { - memcpy(node->mn_data + key->mv_size, &ofp->mp_pgno, - sizeof(pgno_t)); - if (F_ISSET(flags, MDB_RESERVE)) - data->mv_data = METADATA(ofp); - else - memcpy(METADATA(ofp), data->mv_data, data->mv_size); - } - } - - return MDB_SUCCESS; - -full: - DPRINTF(("not enough room in page %"Z"u, got %u ptrs", - mdb_dbg_pgno(mp), NUMKEYS(mp))); - DPRINTF(("upper-lower = %u - %u = %"Z"d", mp->mp_upper,mp->mp_lower,room)); - DPRINTF(("node size = %"Z"u", node_size)); - mc->mc_txn->mt_flags |= MDB_TXN_ERROR; - return MDB_PAGE_FULL; -} - -/** Delete the specified node from a page. - * @param[in] mc Cursor pointing to the node to delete. - * @param[in] ksize The size of a node. Only used if the page is - * part of a #MDB_DUPFIXED database. - */ -static void -mdb_node_del(MDB_cursor *mc, int ksize) -{ - MDB_page *mp = mc->mc_pg[mc->mc_top]; - indx_t indx = mc->mc_ki[mc->mc_top]; - unsigned int sz; - indx_t i, j, numkeys, ptr; - MDB_node *node; - char *base; - - DPRINTF(("delete node %u on %s page %"Z"u", indx, - IS_LEAF(mp) ? "leaf" : "branch", mdb_dbg_pgno(mp))); - numkeys = NUMKEYS(mp); - mdb_cassert(mc, indx < numkeys); - - if (IS_LEAF2(mp)) { - int x = numkeys - 1 - indx; - base = LEAF2KEY(mp, indx, ksize); - if (x) - memmove(base, base + ksize, x * ksize); - mp->mp_lower -= sizeof(indx_t); - mp->mp_upper += ksize - sizeof(indx_t); - return; - } - - node = NODEPTR(mp, indx); - sz = NODESIZE + node->mn_ksize; - if (IS_LEAF(mp)) { - if (F_ISSET(node->mn_flags, F_BIGDATA)) - sz += sizeof(pgno_t); - else - sz += NODEDSZ(node); - } - sz = EVEN(sz); - - ptr = mp->mp_ptrs[indx]; - for (i = j = 0; i < numkeys; i++) { - if (i != indx) { - mp->mp_ptrs[j] = mp->mp_ptrs[i]; - if (mp->mp_ptrs[i] < ptr) - mp->mp_ptrs[j] += sz; - j++; - } - } - - base = (char *)mp + mp->mp_upper + PAGEBASE; - memmove(base + sz, base, ptr - mp->mp_upper); - - mp->mp_lower -= sizeof(indx_t); - mp->mp_upper += sz; -} - -/** Compact the main page after deleting a node on a subpage. - * @param[in] mp The main page to operate on. - * @param[in] indx The index of the subpage on the main page. - */ -static void -mdb_node_shrink(MDB_page *mp, indx_t indx) -{ - MDB_node *node; - MDB_page *sp, *xp; - char *base; - int nsize, delta; - indx_t i, numkeys, ptr; - - node = NODEPTR(mp, indx); - sp = (MDB_page *)NODEDATA(node); - delta = SIZELEFT(sp); - xp = (MDB_page *)((char *)sp + delta); - - /* shift subpage upward */ - if (IS_LEAF2(sp)) { - nsize = NUMKEYS(sp) * sp->mp_pad; - if (nsize & 1) - return; /* do not make the node uneven-sized */ - memmove(METADATA(xp), METADATA(sp), nsize); - } else { - int i; - numkeys = NUMKEYS(sp); - for (i=numkeys-1; i>=0; i--) - xp->mp_ptrs[i] = sp->mp_ptrs[i] - delta; - } - xp->mp_upper = sp->mp_lower; - xp->mp_lower = sp->mp_lower; - xp->mp_flags = sp->mp_flags; - xp->mp_pad = sp->mp_pad; - COPY_PGNO(xp->mp_pgno, mp->mp_pgno); - - nsize = NODEDSZ(node) - delta; - SETDSZ(node, nsize); - - /* shift lower nodes upward */ - ptr = mp->mp_ptrs[indx]; - numkeys = NUMKEYS(mp); - for (i = 0; i < numkeys; i++) { - if (mp->mp_ptrs[i] <= ptr) - mp->mp_ptrs[i] += delta; - } - - base = (char *)mp + mp->mp_upper + PAGEBASE; - memmove(base + delta, base, ptr - mp->mp_upper + NODESIZE + NODEKSZ(node)); - mp->mp_upper += delta; -} - -/** Initial setup of a sorted-dups cursor. - * Sorted duplicates are implemented as a sub-database for the given key. - * The duplicate data items are actually keys of the sub-database. - * Operations on the duplicate data items are performed using a sub-cursor - * initialized when the sub-database is first accessed. This function does - * the preliminary setup of the sub-cursor, filling in the fields that - * depend only on the parent DB. - * @param[in] mc The main cursor whose sorted-dups cursor is to be initialized. - */ -static void -mdb_xcursor_init0(MDB_cursor *mc) -{ - MDB_xcursor *mx = mc->mc_xcursor; - - mx->mx_cursor.mc_xcursor = NULL; - mx->mx_cursor.mc_txn = mc->mc_txn; - mx->mx_cursor.mc_db = &mx->mx_db; - mx->mx_cursor.mc_dbx = &mx->mx_dbx; - mx->mx_cursor.mc_dbi = mc->mc_dbi; - mx->mx_cursor.mc_dbflag = &mx->mx_dbflag; - mx->mx_cursor.mc_snum = 0; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_SUB; - mx->mx_dbx.md_name.mv_size = 0; - mx->mx_dbx.md_name.mv_data = NULL; - mx->mx_dbx.md_cmp = mc->mc_dbx->md_dcmp; - mx->mx_dbx.md_dcmp = NULL; - mx->mx_dbx.md_rel = mc->mc_dbx->md_rel; -} - -/** Final setup of a sorted-dups cursor. - * Sets up the fields that depend on the data from the main cursor. - * @param[in] mc The main cursor whose sorted-dups cursor is to be initialized. - * @param[in] node The data containing the #MDB_db record for the - * sorted-dup database. - */ -static void -mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node) -{ - MDB_xcursor *mx = mc->mc_xcursor; - - if (node->mn_flags & F_SUBDATA) { - memcpy(&mx->mx_db, NODEDATA(node), sizeof(MDB_db)); - mx->mx_cursor.mc_pg[0] = 0; - mx->mx_cursor.mc_snum = 0; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_SUB; - } else { - MDB_page *fp = NODEDATA(node); - mx->mx_db.md_pad = mc->mc_pg[mc->mc_top]->mp_pad; - mx->mx_db.md_flags = 0; - mx->mx_db.md_depth = 1; - mx->mx_db.md_branch_pages = 0; - mx->mx_db.md_leaf_pages = 1; - mx->mx_db.md_overflow_pages = 0; - mx->mx_db.md_entries = NUMKEYS(fp); - COPY_PGNO(mx->mx_db.md_root, fp->mp_pgno); - mx->mx_cursor.mc_snum = 1; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_INITIALIZED|C_SUB; - mx->mx_cursor.mc_pg[0] = fp; - mx->mx_cursor.mc_ki[0] = 0; - if (mc->mc_db->md_flags & MDB_DUPFIXED) { - mx->mx_db.md_flags = MDB_DUPFIXED; - mx->mx_db.md_pad = fp->mp_pad; - if (mc->mc_db->md_flags & MDB_INTEGERDUP) - mx->mx_db.md_flags |= MDB_INTEGERKEY; - } - } - DPRINTF(("Sub-db -%u root page %"Z"u", mx->mx_cursor.mc_dbi, - mx->mx_db.md_root)); - mx->mx_dbflag = DB_VALID|DB_DIRTY; /* DB_DIRTY guides mdb_cursor_touch */ -#if UINT_MAX < SIZE_MAX - if (mx->mx_dbx.md_cmp == mdb_cmp_int && mx->mx_db.md_pad == sizeof(size_t)) - mx->mx_dbx.md_cmp = mdb_cmp_clong; -#endif -} - -/** Initialize a cursor for a given transaction and database. */ -static void -mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx) -{ - mc->mc_next = NULL; - mc->mc_backup = NULL; - mc->mc_dbi = dbi; - mc->mc_txn = txn; - mc->mc_db = &txn->mt_dbs[dbi]; - mc->mc_dbx = &txn->mt_dbxs[dbi]; - mc->mc_dbflag = &txn->mt_dbflags[dbi]; - mc->mc_snum = 0; - mc->mc_top = 0; - mc->mc_pg[0] = 0; - mc->mc_ki[0] = 0; - mc->mc_flags = 0; - if (txn->mt_dbs[dbi].md_flags & MDB_DUPSORT) { - mdb_tassert(txn, mx != NULL); - mc->mc_xcursor = mx; - mdb_xcursor_init0(mc); - } else { - mc->mc_xcursor = NULL; - } - if (*mc->mc_dbflag & DB_STALE) { - mdb_page_search(mc, NULL, MDB_PS_ROOTONLY); - } -} - -int -mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **ret) -{ - MDB_cursor *mc; - size_t size = sizeof(MDB_cursor); - - if (!ret || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - if (txn->mt_flags & MDB_TXN_ERROR) - return MDB_BAD_TXN; - - /* Allow read access to the freelist */ - if (!dbi && !F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) - return EINVAL; - - if (txn->mt_dbs[dbi].md_flags & MDB_DUPSORT) - size += sizeof(MDB_xcursor); - - if ((mc = malloc(size)) != NULL) { - mdb_cursor_init(mc, txn, dbi, (MDB_xcursor *)(mc + 1)); - if (txn->mt_cursors) { - mc->mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = mc; - mc->mc_flags |= C_UNTRACK; - } - } else { - return ENOMEM; - } - - *ret = mc; - - return MDB_SUCCESS; -} - -int -mdb_cursor_renew(MDB_txn *txn, MDB_cursor *mc) -{ - if (!mc || !TXN_DBI_EXIST(txn, mc->mc_dbi)) - return EINVAL; - - if ((mc->mc_flags & C_UNTRACK) || txn->mt_cursors) - return EINVAL; - - if (txn->mt_flags & MDB_TXN_ERROR) - return MDB_BAD_TXN; - - mdb_cursor_init(mc, txn, mc->mc_dbi, mc->mc_xcursor); - return MDB_SUCCESS; -} - -/* Return the count of duplicate data items for the current key */ -int -mdb_cursor_count(MDB_cursor *mc, size_t *countp) -{ - MDB_node *leaf; - - if (mc == NULL || countp == NULL) - return EINVAL; - - if (mc->mc_xcursor == NULL) - return MDB_INCOMPATIBLE; - - if (mc->mc_txn->mt_flags & MDB_TXN_ERROR) - return MDB_BAD_TXN; - - if (!(mc->mc_flags & C_INITIALIZED)) - return EINVAL; - - if (!mc->mc_snum || (mc->mc_flags & C_EOF)) - return MDB_NOTFOUND; - - leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) { - *countp = 1; - } else { - if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) - return EINVAL; - - *countp = mc->mc_xcursor->mx_db.md_entries; - } - return MDB_SUCCESS; -} - -void -mdb_cursor_close(MDB_cursor *mc) -{ - if (mc && !mc->mc_backup) { - /* remove from txn, if tracked */ - if ((mc->mc_flags & C_UNTRACK) && mc->mc_txn->mt_cursors) { - MDB_cursor **prev = &mc->mc_txn->mt_cursors[mc->mc_dbi]; - while (*prev && *prev != mc) prev = &(*prev)->mc_next; - if (*prev == mc) - *prev = mc->mc_next; - } - free(mc); - } -} - -MDB_txn * -mdb_cursor_txn(MDB_cursor *mc) -{ - if (!mc) return NULL; - return mc->mc_txn; -} - -MDB_dbi -mdb_cursor_dbi(MDB_cursor *mc) -{ - return mc->mc_dbi; -} - -/** Replace the key for a branch node with a new key. - * @param[in] mc Cursor pointing to the node to operate on. - * @param[in] key The new key to use. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_update_key(MDB_cursor *mc, MDB_val *key) -{ - MDB_page *mp; - MDB_node *node; - char *base; - size_t len; - int delta, ksize, oksize; - indx_t ptr, i, numkeys, indx; - DKBUF; - - indx = mc->mc_ki[mc->mc_top]; - mp = mc->mc_pg[mc->mc_top]; - node = NODEPTR(mp, indx); - ptr = mp->mp_ptrs[indx]; -#if MDB_DEBUG - { - MDB_val k2; - char kbuf2[DKBUF_MAXKEYSIZE*2+1]; - k2.mv_data = NODEKEY(node); - k2.mv_size = node->mn_ksize; - DPRINTF(("update key %u (ofs %u) [%s] to [%s] on page %"Z"u", - indx, ptr, - mdb_dkey(&k2, kbuf2), - DKEY(key), - mp->mp_pgno)); - } -#endif - - /* Sizes must be 2-byte aligned. */ - ksize = EVEN(key->mv_size); - oksize = EVEN(node->mn_ksize); - delta = ksize - oksize; - - /* Shift node contents if EVEN(key length) changed. */ - if (delta) { - if (delta > 0 && SIZELEFT(mp) < delta) { - pgno_t pgno; - /* not enough space left, do a delete and split */ - DPRINTF(("Not enough room, delta = %d, splitting...", delta)); - pgno = NODEPGNO(node); - mdb_node_del(mc, 0); - return mdb_page_split(mc, key, NULL, pgno, MDB_SPLIT_REPLACE); - } - - numkeys = NUMKEYS(mp); - for (i = 0; i < numkeys; i++) { - if (mp->mp_ptrs[i] <= ptr) - mp->mp_ptrs[i] -= delta; - } - - base = (char *)mp + mp->mp_upper + PAGEBASE; - len = ptr - mp->mp_upper + NODESIZE; - memmove(base - delta, base, len); - mp->mp_upper -= delta; - - node = NODEPTR(mp, indx); - } - - /* But even if no shift was needed, update ksize */ - if (node->mn_ksize != key->mv_size) - node->mn_ksize = key->mv_size; - - if (key->mv_size) - memcpy(NODEKEY(node), key->mv_data, key->mv_size); - - return MDB_SUCCESS; -} - -static void -mdb_cursor_copy(const MDB_cursor *csrc, MDB_cursor *cdst); - -/** Move a node from csrc to cdst. - */ -static int -mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst) -{ - MDB_node *srcnode; - MDB_val key, data; - pgno_t srcpg; - MDB_cursor mn; - int rc; - unsigned short flags; - - DKBUF; - - /* Mark src and dst as dirty. */ - if ((rc = mdb_page_touch(csrc)) || - (rc = mdb_page_touch(cdst))) - return rc; - - if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) { - key.mv_size = csrc->mc_db->md_pad; - key.mv_data = LEAF2KEY(csrc->mc_pg[csrc->mc_top], csrc->mc_ki[csrc->mc_top], key.mv_size); - data.mv_size = 0; - data.mv_data = NULL; - srcpg = 0; - flags = 0; - } else { - srcnode = NODEPTR(csrc->mc_pg[csrc->mc_top], csrc->mc_ki[csrc->mc_top]); - mdb_cassert(csrc, !((size_t)srcnode & 1)); - srcpg = NODEPGNO(srcnode); - flags = srcnode->mn_flags; - if (csrc->mc_ki[csrc->mc_top] == 0 && IS_BRANCH(csrc->mc_pg[csrc->mc_top])) { - unsigned int snum = csrc->mc_snum; - MDB_node *s2; - /* must find the lowest key below src */ - rc = mdb_page_search_lowest(csrc); - if (rc) - return rc; - if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) { - key.mv_size = csrc->mc_db->md_pad; - key.mv_data = LEAF2KEY(csrc->mc_pg[csrc->mc_top], 0, key.mv_size); - } else { - s2 = NODEPTR(csrc->mc_pg[csrc->mc_top], 0); - key.mv_size = NODEKSZ(s2); - key.mv_data = NODEKEY(s2); - } - csrc->mc_snum = snum--; - csrc->mc_top = snum; - } else { - key.mv_size = NODEKSZ(srcnode); - key.mv_data = NODEKEY(srcnode); - } - data.mv_size = NODEDSZ(srcnode); - data.mv_data = NODEDATA(srcnode); - } - if (IS_BRANCH(cdst->mc_pg[cdst->mc_top]) && cdst->mc_ki[cdst->mc_top] == 0) { - unsigned int snum = cdst->mc_snum; - MDB_node *s2; - MDB_val bkey; - /* must find the lowest key below dst */ - mdb_cursor_copy(cdst, &mn); - rc = mdb_page_search_lowest(&mn); - if (rc) - return rc; - if (IS_LEAF2(mn.mc_pg[mn.mc_top])) { - bkey.mv_size = mn.mc_db->md_pad; - bkey.mv_data = LEAF2KEY(mn.mc_pg[mn.mc_top], 0, bkey.mv_size); - } else { - s2 = NODEPTR(mn.mc_pg[mn.mc_top], 0); - bkey.mv_size = NODEKSZ(s2); - bkey.mv_data = NODEKEY(s2); - } - mn.mc_snum = snum--; - mn.mc_top = snum; - mn.mc_ki[snum] = 0; - rc = mdb_update_key(&mn, &bkey); - if (rc) - return rc; - } - - DPRINTF(("moving %s node %u [%s] on page %"Z"u to node %u on page %"Z"u", - IS_LEAF(csrc->mc_pg[csrc->mc_top]) ? "leaf" : "branch", - csrc->mc_ki[csrc->mc_top], - DKEY(&key), - csrc->mc_pg[csrc->mc_top]->mp_pgno, - cdst->mc_ki[cdst->mc_top], cdst->mc_pg[cdst->mc_top]->mp_pgno)); - - /* Add the node to the destination page. - */ - rc = mdb_node_add(cdst, cdst->mc_ki[cdst->mc_top], &key, &data, srcpg, flags); - if (rc != MDB_SUCCESS) - return rc; - - /* Delete the node from the source page. - */ - mdb_node_del(csrc, key.mv_size); - - { - /* Adjust other cursors pointing to mp */ - MDB_cursor *m2, *m3; - MDB_dbi dbi = csrc->mc_dbi; - MDB_page *mp = csrc->mc_pg[csrc->mc_top]; - - for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { - if (csrc->mc_flags & C_SUB) - m3 = &m2->mc_xcursor->mx_cursor; - else - m3 = m2; - if (m3 == csrc) continue; - if (m3->mc_pg[csrc->mc_top] == mp && m3->mc_ki[csrc->mc_top] == - csrc->mc_ki[csrc->mc_top]) { - m3->mc_pg[csrc->mc_top] = cdst->mc_pg[cdst->mc_top]; - m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; - } - } - } - - /* Update the parent separators. - */ - if (csrc->mc_ki[csrc->mc_top] == 0) { - if (csrc->mc_ki[csrc->mc_top-1] != 0) { - if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) { - key.mv_data = LEAF2KEY(csrc->mc_pg[csrc->mc_top], 0, key.mv_size); - } else { - srcnode = NODEPTR(csrc->mc_pg[csrc->mc_top], 0); - key.mv_size = NODEKSZ(srcnode); - key.mv_data = NODEKEY(srcnode); - } - DPRINTF(("update separator for source page %"Z"u to [%s]", - csrc->mc_pg[csrc->mc_top]->mp_pgno, DKEY(&key))); - mdb_cursor_copy(csrc, &mn); - mn.mc_snum--; - mn.mc_top--; - if ((rc = mdb_update_key(&mn, &key)) != MDB_SUCCESS) - return rc; - } - if (IS_BRANCH(csrc->mc_pg[csrc->mc_top])) { - MDB_val nullkey; - indx_t ix = csrc->mc_ki[csrc->mc_top]; - nullkey.mv_size = 0; - csrc->mc_ki[csrc->mc_top] = 0; - rc = mdb_update_key(csrc, &nullkey); - csrc->mc_ki[csrc->mc_top] = ix; - mdb_cassert(csrc, rc == MDB_SUCCESS); - } - } - - if (cdst->mc_ki[cdst->mc_top] == 0) { - if (cdst->mc_ki[cdst->mc_top-1] != 0) { - if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) { - key.mv_data = LEAF2KEY(cdst->mc_pg[cdst->mc_top], 0, key.mv_size); - } else { - srcnode = NODEPTR(cdst->mc_pg[cdst->mc_top], 0); - key.mv_size = NODEKSZ(srcnode); - key.mv_data = NODEKEY(srcnode); - } - DPRINTF(("update separator for destination page %"Z"u to [%s]", - cdst->mc_pg[cdst->mc_top]->mp_pgno, DKEY(&key))); - mdb_cursor_copy(cdst, &mn); - mn.mc_snum--; - mn.mc_top--; - if ((rc = mdb_update_key(&mn, &key)) != MDB_SUCCESS) - return rc; - } - if (IS_BRANCH(cdst->mc_pg[cdst->mc_top])) { - MDB_val nullkey; - indx_t ix = cdst->mc_ki[cdst->mc_top]; - nullkey.mv_size = 0; - cdst->mc_ki[cdst->mc_top] = 0; - rc = mdb_update_key(cdst, &nullkey); - cdst->mc_ki[cdst->mc_top] = ix; - mdb_cassert(cdst, rc == MDB_SUCCESS); - } - } - - return MDB_SUCCESS; -} - -/** Merge one page into another. - * The nodes from the page pointed to by \b csrc will - * be copied to the page pointed to by \b cdst and then - * the \b csrc page will be freed. - * @param[in] csrc Cursor pointing to the source page. - * @param[in] cdst Cursor pointing to the destination page. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst) -{ - MDB_page *psrc, *pdst; - MDB_node *srcnode; - MDB_val key, data; - unsigned nkeys; - int rc; - indx_t i, j; - - psrc = csrc->mc_pg[csrc->mc_top]; - pdst = cdst->mc_pg[cdst->mc_top]; - - DPRINTF(("merging page %"Z"u into %"Z"u", psrc->mp_pgno, pdst->mp_pgno)); - - mdb_cassert(csrc, csrc->mc_snum > 1); /* can't merge root page */ - mdb_cassert(csrc, cdst->mc_snum > 1); - - /* Mark dst as dirty. */ - if ((rc = mdb_page_touch(cdst))) - return rc; - - /* Move all nodes from src to dst. - */ - j = nkeys = NUMKEYS(pdst); - if (IS_LEAF2(psrc)) { - key.mv_size = csrc->mc_db->md_pad; - key.mv_data = METADATA(psrc); - for (i = 0; i < NUMKEYS(psrc); i++, j++) { - rc = mdb_node_add(cdst, j, &key, NULL, 0, 0); - if (rc != MDB_SUCCESS) - return rc; - key.mv_data = (char *)key.mv_data + key.mv_size; - } - } else { - for (i = 0; i < NUMKEYS(psrc); i++, j++) { - srcnode = NODEPTR(psrc, i); - if (i == 0 && IS_BRANCH(psrc)) { - MDB_cursor mn; - MDB_node *s2; - mdb_cursor_copy(csrc, &mn); - /* must find the lowest key below src */ - rc = mdb_page_search_lowest(&mn); - if (rc) - return rc; - if (IS_LEAF2(mn.mc_pg[mn.mc_top])) { - key.mv_size = mn.mc_db->md_pad; - key.mv_data = LEAF2KEY(mn.mc_pg[mn.mc_top], 0, key.mv_size); - } else { - s2 = NODEPTR(mn.mc_pg[mn.mc_top], 0); - key.mv_size = NODEKSZ(s2); - key.mv_data = NODEKEY(s2); - } - } else { - key.mv_size = srcnode->mn_ksize; - key.mv_data = NODEKEY(srcnode); - } - - data.mv_size = NODEDSZ(srcnode); - data.mv_data = NODEDATA(srcnode); - rc = mdb_node_add(cdst, j, &key, &data, NODEPGNO(srcnode), srcnode->mn_flags); - if (rc != MDB_SUCCESS) - return rc; - } - } - - DPRINTF(("dst page %"Z"u now has %u keys (%.1f%% filled)", - pdst->mp_pgno, NUMKEYS(pdst), - (float)PAGEFILL(cdst->mc_txn->mt_env, pdst) / 10)); - - /* Unlink the src page from parent and add to free list. - */ - csrc->mc_top--; - mdb_node_del(csrc, 0); - if (csrc->mc_ki[csrc->mc_top] == 0) { - key.mv_size = 0; - rc = mdb_update_key(csrc, &key); - if (rc) { - csrc->mc_top++; - return rc; - } - } - csrc->mc_top++; - - psrc = csrc->mc_pg[csrc->mc_top]; - /* If not operating on FreeDB, allow this page to be reused - * in this txn. Otherwise just add to free list. - */ - rc = mdb_page_loose(csrc, psrc); - if (rc) - return rc; - if (IS_LEAF(psrc)) - csrc->mc_db->md_leaf_pages--; - else - csrc->mc_db->md_branch_pages--; - { - /* Adjust other cursors pointing to mp */ - MDB_cursor *m2, *m3; - MDB_dbi dbi = csrc->mc_dbi; - - for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { - if (csrc->mc_flags & C_SUB) - m3 = &m2->mc_xcursor->mx_cursor; - else - m3 = m2; - if (m3 == csrc) continue; - if (m3->mc_snum < csrc->mc_snum) continue; - if (m3->mc_pg[csrc->mc_top] == psrc) { - m3->mc_pg[csrc->mc_top] = pdst; - m3->mc_ki[csrc->mc_top] += nkeys; - } - } - } - { - unsigned int snum = cdst->mc_snum; - uint16_t depth = cdst->mc_db->md_depth; - mdb_cursor_pop(cdst); - rc = mdb_rebalance(cdst); - /* Did the tree shrink? */ - if (depth > cdst->mc_db->md_depth) - snum--; - cdst->mc_snum = snum; - cdst->mc_top = snum-1; - } - return rc; -} - -/** Copy the contents of a cursor. - * @param[in] csrc The cursor to copy from. - * @param[out] cdst The cursor to copy to. - */ -static void -mdb_cursor_copy(const MDB_cursor *csrc, MDB_cursor *cdst) -{ - unsigned int i; - - cdst->mc_txn = csrc->mc_txn; - cdst->mc_dbi = csrc->mc_dbi; - cdst->mc_db = csrc->mc_db; - cdst->mc_dbx = csrc->mc_dbx; - cdst->mc_snum = csrc->mc_snum; - cdst->mc_top = csrc->mc_top; - cdst->mc_flags = csrc->mc_flags; - - for (i=0; imc_snum; i++) { - cdst->mc_pg[i] = csrc->mc_pg[i]; - cdst->mc_ki[i] = csrc->mc_ki[i]; - } -} - -/** Rebalance the tree after a delete operation. - * @param[in] mc Cursor pointing to the page where rebalancing - * should begin. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_rebalance(MDB_cursor *mc) -{ - MDB_node *node; - int rc; - unsigned int ptop, minkeys; - MDB_cursor mn; - indx_t oldki; - - minkeys = 1 + (IS_BRANCH(mc->mc_pg[mc->mc_top])); - DPRINTF(("rebalancing %s page %"Z"u (has %u keys, %.1f%% full)", - IS_LEAF(mc->mc_pg[mc->mc_top]) ? "leaf" : "branch", - mdb_dbg_pgno(mc->mc_pg[mc->mc_top]), NUMKEYS(mc->mc_pg[mc->mc_top]), - (float)PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) / 10)); - - if (PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) >= FILL_THRESHOLD && - NUMKEYS(mc->mc_pg[mc->mc_top]) >= minkeys) { - DPRINTF(("no need to rebalance page %"Z"u, above fill threshold", - mdb_dbg_pgno(mc->mc_pg[mc->mc_top]))); - return MDB_SUCCESS; - } - - if (mc->mc_snum < 2) { - MDB_page *mp = mc->mc_pg[0]; - if (IS_SUBP(mp)) { - DPUTS("Can't rebalance a subpage, ignoring"); - return MDB_SUCCESS; - } - if (NUMKEYS(mp) == 0) { - DPUTS("tree is completely empty"); - mc->mc_db->md_root = P_INVALID; - mc->mc_db->md_depth = 0; - mc->mc_db->md_leaf_pages = 0; - rc = mdb_midl_append(&mc->mc_txn->mt_free_pgs, mp->mp_pgno); - if (rc) - return rc; - /* Adjust cursors pointing to mp */ - mc->mc_snum = 0; - mc->mc_top = 0; - mc->mc_flags &= ~C_INITIALIZED; - { - MDB_cursor *m2, *m3; - MDB_dbi dbi = mc->mc_dbi; - - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { - if (mc->mc_flags & C_SUB) - m3 = &m2->mc_xcursor->mx_cursor; - else - m3 = m2; - if (m3->mc_snum < mc->mc_snum) continue; - if (m3->mc_pg[0] == mp) { - m3->mc_snum = 0; - m3->mc_top = 0; - m3->mc_flags &= ~C_INITIALIZED; - } - } - } - } else if (IS_BRANCH(mp) && NUMKEYS(mp) == 1) { - int i; - DPUTS("collapsing root page!"); - rc = mdb_midl_append(&mc->mc_txn->mt_free_pgs, mp->mp_pgno); - if (rc) - return rc; - mc->mc_db->md_root = NODEPGNO(NODEPTR(mp, 0)); - rc = mdb_page_get(mc->mc_txn,mc->mc_db->md_root,&mc->mc_pg[0],NULL); - if (rc) - return rc; - mc->mc_db->md_depth--; - mc->mc_db->md_branch_pages--; - mc->mc_ki[0] = mc->mc_ki[1]; - for (i = 1; imc_db->md_depth; i++) { - mc->mc_pg[i] = mc->mc_pg[i+1]; - mc->mc_ki[i] = mc->mc_ki[i+1]; - } - { - /* Adjust other cursors pointing to mp */ - MDB_cursor *m2, *m3; - MDB_dbi dbi = mc->mc_dbi; - - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { - if (mc->mc_flags & C_SUB) - m3 = &m2->mc_xcursor->mx_cursor; - else - m3 = m2; - if (m3 == mc || m3->mc_snum < mc->mc_snum) continue; - if (m3->mc_pg[0] == mp) { - for (i=0; imc_snum; i++) { - m3->mc_pg[i] = m3->mc_pg[i+1]; - m3->mc_ki[i] = m3->mc_ki[i+1]; - } - m3->mc_snum--; - m3->mc_top--; - } - } - } - } else - DPUTS("root page doesn't need rebalancing"); - return MDB_SUCCESS; - } - - /* The parent (branch page) must have at least 2 pointers, - * otherwise the tree is invalid. - */ - ptop = mc->mc_top-1; - mdb_cassert(mc, NUMKEYS(mc->mc_pg[ptop]) > 1); - - /* Leaf page fill factor is below the threshold. - * Try to move keys from left or right neighbor, or - * merge with a neighbor page. - */ - - /* Find neighbors. - */ - mdb_cursor_copy(mc, &mn); - mn.mc_xcursor = NULL; - - oldki = mc->mc_ki[mc->mc_top]; - if (mc->mc_ki[ptop] == 0) { - /* We're the leftmost leaf in our parent. - */ - DPUTS("reading right neighbor"); - mn.mc_ki[ptop]++; - node = NODEPTR(mc->mc_pg[ptop], mn.mc_ki[ptop]); - rc = mdb_page_get(mc->mc_txn,NODEPGNO(node),&mn.mc_pg[mn.mc_top],NULL); - if (rc) - return rc; - mn.mc_ki[mn.mc_top] = 0; - mc->mc_ki[mc->mc_top] = NUMKEYS(mc->mc_pg[mc->mc_top]); - } else { - /* There is at least one neighbor to the left. - */ - DPUTS("reading left neighbor"); - mn.mc_ki[ptop]--; - node = NODEPTR(mc->mc_pg[ptop], mn.mc_ki[ptop]); - rc = mdb_page_get(mc->mc_txn,NODEPGNO(node),&mn.mc_pg[mn.mc_top],NULL); - if (rc) - return rc; - mn.mc_ki[mn.mc_top] = NUMKEYS(mn.mc_pg[mn.mc_top]) - 1; - mc->mc_ki[mc->mc_top] = 0; - } - - DPRINTF(("found neighbor page %"Z"u (%u keys, %.1f%% full)", - mn.mc_pg[mn.mc_top]->mp_pgno, NUMKEYS(mn.mc_pg[mn.mc_top]), - (float)PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) / 10)); - - /* If the neighbor page is above threshold and has enough keys, - * move one key from it. Otherwise we should try to merge them. - * (A branch page must never have less than 2 keys.) - */ - minkeys = 1 + (IS_BRANCH(mn.mc_pg[mn.mc_top])); - if (PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) >= FILL_THRESHOLD && NUMKEYS(mn.mc_pg[mn.mc_top]) > minkeys) { - rc = mdb_node_move(&mn, mc); - if (mc->mc_ki[ptop]) { - oldki++; - } - } else { - if (mc->mc_ki[ptop] == 0) { - rc = mdb_page_merge(&mn, mc); - } else { - MDB_cursor dummy; - oldki += NUMKEYS(mn.mc_pg[mn.mc_top]); - mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1; - /* We want mdb_rebalance to find mn when doing fixups */ - if (mc->mc_flags & C_SUB) { - dummy.mc_next = mc->mc_txn->mt_cursors[mc->mc_dbi]; - mc->mc_txn->mt_cursors[mc->mc_dbi] = &dummy; - dummy.mc_xcursor = (MDB_xcursor *)&mn; - } else { - mn.mc_next = mc->mc_txn->mt_cursors[mc->mc_dbi]; - mc->mc_txn->mt_cursors[mc->mc_dbi] = &mn; - } - rc = mdb_page_merge(mc, &mn); - if (mc->mc_flags & C_SUB) - mc->mc_txn->mt_cursors[mc->mc_dbi] = dummy.mc_next; - else - mc->mc_txn->mt_cursors[mc->mc_dbi] = mn.mc_next; - mdb_cursor_copy(&mn, mc); - } - mc->mc_flags &= ~C_EOF; - } - mc->mc_ki[mc->mc_top] = oldki; - return rc; -} - -/** Complete a delete operation started by #mdb_cursor_del(). */ -static int -mdb_cursor_del0(MDB_cursor *mc) -{ - int rc; - MDB_page *mp; - indx_t ki; - unsigned int nkeys; - - ki = mc->mc_ki[mc->mc_top]; - mdb_node_del(mc, mc->mc_db->md_pad); - mc->mc_db->md_entries--; - rc = mdb_rebalance(mc); - - if (rc == MDB_SUCCESS) { - MDB_cursor *m2, *m3; - MDB_dbi dbi = mc->mc_dbi; - - /* DB is totally empty now, just bail out. - * Other cursors adjustments were already done - * by mdb_rebalance and aren't needed here. - */ - if (!mc->mc_snum) - return rc; - - mp = mc->mc_pg[mc->mc_top]; - nkeys = NUMKEYS(mp); - - /* if mc points past last node in page, find next sibling */ - if (mc->mc_ki[mc->mc_top] >= nkeys) { - rc = mdb_cursor_sibling(mc, 1); - if (rc == MDB_NOTFOUND) { - mc->mc_flags |= C_EOF; - rc = MDB_SUCCESS; - } - } - - /* Adjust other cursors pointing to mp */ - for (m2 = mc->mc_txn->mt_cursors[dbi]; !rc && m2; m2=m2->mc_next) { - m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (! (m2->mc_flags & m3->mc_flags & C_INITIALIZED)) - continue; - if (m3 == mc || m3->mc_snum < mc->mc_snum) - continue; - if (m3->mc_pg[mc->mc_top] == mp) { - if (m3->mc_ki[mc->mc_top] >= ki) { - m3->mc_flags |= C_DEL; - if (m3->mc_ki[mc->mc_top] > ki) - m3->mc_ki[mc->mc_top]--; - else if (mc->mc_db->md_flags & MDB_DUPSORT) - m3->mc_xcursor->mx_cursor.mc_flags |= C_EOF; - } - if (m3->mc_ki[mc->mc_top] >= nkeys) { - rc = mdb_cursor_sibling(m3, 1); - if (rc == MDB_NOTFOUND) { - m3->mc_flags |= C_EOF; - rc = MDB_SUCCESS; - } - } - } - } - mc->mc_flags |= C_DEL; - } - - if (rc) - mc->mc_txn->mt_flags |= MDB_TXN_ERROR; - return rc; -} - -int -mdb_del(MDB_txn *txn, MDB_dbi dbi, - MDB_val *key, MDB_val *data) -{ - if (!key || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR)) - return (txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN; - - if (!F_ISSET(txn->mt_dbs[dbi].md_flags, MDB_DUPSORT)) { - /* must ignore any data */ - data = NULL; - } - - return mdb_del0(txn, dbi, key, data, 0); -} - -static int -mdb_del0(MDB_txn *txn, MDB_dbi dbi, - MDB_val *key, MDB_val *data, unsigned flags) -{ - MDB_cursor mc; - MDB_xcursor mx; - MDB_cursor_op op; - MDB_val rdata, *xdata; - int rc, exact = 0; - DKBUF; - - DPRINTF(("====> delete db %u key [%s]", dbi, DKEY(key))); - - mdb_cursor_init(&mc, txn, dbi, &mx); - - if (data) { - op = MDB_GET_BOTH; - rdata = *data; - xdata = &rdata; - } else { - op = MDB_SET; - xdata = NULL; - flags |= MDB_NODUPDATA; - } - rc = mdb_cursor_set(&mc, key, xdata, op, &exact); - if (rc == 0) { - /* let mdb_page_split know about this cursor if needed: - * delete will trigger a rebalance; if it needs to move - * a node from one page to another, it will have to - * update the parent's separator key(s). If the new sepkey - * is larger than the current one, the parent page may - * run out of space, triggering a split. We need this - * cursor to be consistent until the end of the rebalance. - */ - mc.mc_flags |= C_UNTRACK; - mc.mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = &mc; - rc = mdb_cursor_del(&mc, flags); - txn->mt_cursors[dbi] = mc.mc_next; - } - return rc; -} - -/** Split a page and insert a new node. - * @param[in,out] mc Cursor pointing to the page and desired insertion index. - * The cursor will be updated to point to the actual page and index where - * the node got inserted after the split. - * @param[in] newkey The key for the newly inserted node. - * @param[in] newdata The data for the newly inserted node. - * @param[in] newpgno The page number, if the new node is a branch node. - * @param[in] nflags The #NODE_ADD_FLAGS for the new node. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno, - unsigned int nflags) -{ - unsigned int flags; - int rc = MDB_SUCCESS, new_root = 0, did_split = 0; - indx_t newindx; - pgno_t pgno = 0; - int i, j, split_indx, nkeys, pmax; - MDB_env *env = mc->mc_txn->mt_env; - MDB_node *node; - MDB_val sepkey, rkey, xdata, *rdata = &xdata; - MDB_page *copy = NULL; - MDB_page *mp, *rp, *pp; - int ptop; - MDB_cursor mn; - DKBUF; - - mp = mc->mc_pg[mc->mc_top]; - newindx = mc->mc_ki[mc->mc_top]; - nkeys = NUMKEYS(mp); - - DPRINTF(("-----> splitting %s page %"Z"u and adding [%s] at index %i/%i", - IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno, - DKEY(newkey), mc->mc_ki[mc->mc_top], nkeys)); - - /* Create a right sibling. */ - if ((rc = mdb_page_new(mc, mp->mp_flags, 1, &rp))) - return rc; - DPRINTF(("new right sibling: page %"Z"u", rp->mp_pgno)); - - if (mc->mc_snum < 2) { - if ((rc = mdb_page_new(mc, P_BRANCH, 1, &pp))) - goto done; - /* shift current top to make room for new parent */ - mc->mc_pg[1] = mc->mc_pg[0]; - mc->mc_ki[1] = mc->mc_ki[0]; - mc->mc_pg[0] = pp; - mc->mc_ki[0] = 0; - mc->mc_db->md_root = pp->mp_pgno; - DPRINTF(("root split! new root = %"Z"u", pp->mp_pgno)); - mc->mc_db->md_depth++; - new_root = 1; - - /* Add left (implicit) pointer. */ - if ((rc = mdb_node_add(mc, 0, NULL, NULL, mp->mp_pgno, 0)) != MDB_SUCCESS) { - /* undo the pre-push */ - mc->mc_pg[0] = mc->mc_pg[1]; - mc->mc_ki[0] = mc->mc_ki[1]; - mc->mc_db->md_root = mp->mp_pgno; - mc->mc_db->md_depth--; - goto done; - } - mc->mc_snum = 2; - mc->mc_top = 1; - ptop = 0; - } else { - ptop = mc->mc_top-1; - DPRINTF(("parent branch page is %"Z"u", mc->mc_pg[ptop]->mp_pgno)); - } - - mc->mc_flags |= C_SPLITTING; - mdb_cursor_copy(mc, &mn); - mn.mc_pg[mn.mc_top] = rp; - mn.mc_ki[ptop] = mc->mc_ki[ptop]+1; - - if (nflags & MDB_APPEND) { - mn.mc_ki[mn.mc_top] = 0; - sepkey = *newkey; - split_indx = newindx; - nkeys = 0; - } else { - - split_indx = (nkeys+1) / 2; - - if (IS_LEAF2(rp)) { - char *split, *ins; - int x; - unsigned int lsize, rsize, ksize; - /* Move half of the keys to the right sibling */ - x = mc->mc_ki[mc->mc_top] - split_indx; - ksize = mc->mc_db->md_pad; - split = LEAF2KEY(mp, split_indx, ksize); - rsize = (nkeys - split_indx) * ksize; - lsize = (nkeys - split_indx) * sizeof(indx_t); - mp->mp_lower -= lsize; - rp->mp_lower += lsize; - mp->mp_upper += rsize - lsize; - rp->mp_upper -= rsize - lsize; - sepkey.mv_size = ksize; - if (newindx == split_indx) { - sepkey.mv_data = newkey->mv_data; - } else { - sepkey.mv_data = split; - } - if (x<0) { - ins = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], ksize); - memcpy(rp->mp_ptrs, split, rsize); - sepkey.mv_data = rp->mp_ptrs; - memmove(ins+ksize, ins, (split_indx - mc->mc_ki[mc->mc_top]) * ksize); - memcpy(ins, newkey->mv_data, ksize); - mp->mp_lower += sizeof(indx_t); - mp->mp_upper -= ksize - sizeof(indx_t); - } else { - if (x) - memcpy(rp->mp_ptrs, split, x * ksize); - ins = LEAF2KEY(rp, x, ksize); - memcpy(ins, newkey->mv_data, ksize); - memcpy(ins+ksize, split + x * ksize, rsize - x * ksize); - rp->mp_lower += sizeof(indx_t); - rp->mp_upper -= ksize - sizeof(indx_t); - mc->mc_ki[mc->mc_top] = x; - mc->mc_pg[mc->mc_top] = rp; - } - } else { - int psize, nsize, k; - /* Maximum free space in an empty page */ - pmax = env->me_psize - PAGEHDRSZ; - if (IS_LEAF(mp)) - nsize = mdb_leaf_size(env, newkey, newdata); - else - nsize = mdb_branch_size(env, newkey); - nsize = EVEN(nsize); - - /* grab a page to hold a temporary copy */ - copy = mdb_page_malloc(mc->mc_txn, 1); - if (copy == NULL) { - rc = ENOMEM; - goto done; - } - copy->mp_pgno = mp->mp_pgno; - copy->mp_flags = mp->mp_flags; - copy->mp_lower = (PAGEHDRSZ-PAGEBASE); - copy->mp_upper = env->me_psize - PAGEBASE; - - /* prepare to insert */ - for (i=0, j=0; imp_ptrs[j++] = 0; - } - copy->mp_ptrs[j++] = mp->mp_ptrs[i]; - } - - /* When items are relatively large the split point needs - * to be checked, because being off-by-one will make the - * difference between success or failure in mdb_node_add. - * - * It's also relevant if a page happens to be laid out - * such that one half of its nodes are all "small" and - * the other half of its nodes are "large." If the new - * item is also "large" and falls on the half with - * "large" nodes, it also may not fit. - * - * As a final tweak, if the new item goes on the last - * spot on the page (and thus, onto the new page), bias - * the split so the new page is emptier than the old page. - * This yields better packing during sequential inserts. - */ - if (nkeys < 20 || nsize > pmax/16 || newindx >= nkeys) { - /* Find split point */ - psize = 0; - if (newindx <= split_indx || newindx >= nkeys) { - i = 0; j = 1; - k = newindx >= nkeys ? nkeys : split_indx+2; - } else { - i = nkeys; j = -1; - k = split_indx-1; - } - for (; i!=k; i+=j) { - if (i == newindx) { - psize += nsize; - node = NULL; - } else { - node = (MDB_node *)((char *)mp + copy->mp_ptrs[i] + PAGEBASE); - psize += NODESIZE + NODEKSZ(node) + sizeof(indx_t); - if (IS_LEAF(mp)) { - if (F_ISSET(node->mn_flags, F_BIGDATA)) - psize += sizeof(pgno_t); - else - psize += NODEDSZ(node); - } - psize = EVEN(psize); - } - if (psize > pmax || i == k-j) { - split_indx = i + (j<0); - break; - } - } - } - if (split_indx == newindx) { - sepkey.mv_size = newkey->mv_size; - sepkey.mv_data = newkey->mv_data; - } else { - node = (MDB_node *)((char *)mp + copy->mp_ptrs[split_indx] + PAGEBASE); - sepkey.mv_size = node->mn_ksize; - sepkey.mv_data = NODEKEY(node); - } - } - } - - DPRINTF(("separator is %d [%s]", split_indx, DKEY(&sepkey))); - - /* Copy separator key to the parent. - */ - if (SIZELEFT(mn.mc_pg[ptop]) < mdb_branch_size(env, &sepkey)) { - mn.mc_snum--; - mn.mc_top--; - did_split = 1; - rc = mdb_page_split(&mn, &sepkey, NULL, rp->mp_pgno, 0); - if (rc) - goto done; - - /* root split? */ - if (mn.mc_snum == mc->mc_snum) { - mc->mc_pg[mc->mc_snum] = mc->mc_pg[mc->mc_top]; - mc->mc_ki[mc->mc_snum] = mc->mc_ki[mc->mc_top]; - mc->mc_pg[mc->mc_top] = mc->mc_pg[ptop]; - mc->mc_ki[mc->mc_top] = mc->mc_ki[ptop]; - mc->mc_snum++; - mc->mc_top++; - ptop++; - } - /* Right page might now have changed parent. - * Check if left page also changed parent. - */ - if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && - mc->mc_ki[ptop] >= NUMKEYS(mc->mc_pg[ptop])) { - for (i=0; imc_pg[i] = mn.mc_pg[i]; - mc->mc_ki[i] = mn.mc_ki[i]; - } - mc->mc_pg[ptop] = mn.mc_pg[ptop]; - if (mn.mc_ki[ptop]) { - mc->mc_ki[ptop] = mn.mc_ki[ptop] - 1; - } else { - /* find right page's left sibling */ - mc->mc_ki[ptop] = mn.mc_ki[ptop]; - mdb_cursor_sibling(mc, 0); - } - } - } else { - mn.mc_top--; - rc = mdb_node_add(&mn, mn.mc_ki[ptop], &sepkey, NULL, rp->mp_pgno, 0); - mn.mc_top++; - } - mc->mc_flags ^= C_SPLITTING; - if (rc != MDB_SUCCESS) { - goto done; - } - if (nflags & MDB_APPEND) { - mc->mc_pg[mc->mc_top] = rp; - mc->mc_ki[mc->mc_top] = 0; - rc = mdb_node_add(mc, 0, newkey, newdata, newpgno, nflags); - if (rc) - goto done; - for (i=0; imc_top; i++) - mc->mc_ki[i] = mn.mc_ki[i]; - } else if (!IS_LEAF2(mp)) { - /* Move nodes */ - mc->mc_pg[mc->mc_top] = rp; - i = split_indx; - j = 0; - do { - if (i == newindx) { - rkey.mv_data = newkey->mv_data; - rkey.mv_size = newkey->mv_size; - if (IS_LEAF(mp)) { - rdata = newdata; - } else - pgno = newpgno; - flags = nflags; - /* Update index for the new key. */ - mc->mc_ki[mc->mc_top] = j; - } else { - node = (MDB_node *)((char *)mp + copy->mp_ptrs[i] + PAGEBASE); - rkey.mv_data = NODEKEY(node); - rkey.mv_size = node->mn_ksize; - if (IS_LEAF(mp)) { - xdata.mv_data = NODEDATA(node); - xdata.mv_size = NODEDSZ(node); - rdata = &xdata; - } else - pgno = NODEPGNO(node); - flags = node->mn_flags; - } - - if (!IS_LEAF(mp) && j == 0) { - /* First branch index doesn't need key data. */ - rkey.mv_size = 0; - } - - rc = mdb_node_add(mc, j, &rkey, rdata, pgno, flags); - if (rc) - goto done; - if (i == nkeys) { - i = 0; - j = 0; - mc->mc_pg[mc->mc_top] = copy; - } else { - i++; - j++; - } - } while (i != split_indx); - - nkeys = NUMKEYS(copy); - for (i=0; imp_ptrs[i] = copy->mp_ptrs[i]; - mp->mp_lower = copy->mp_lower; - mp->mp_upper = copy->mp_upper; - memcpy(NODEPTR(mp, nkeys-1), NODEPTR(copy, nkeys-1), - env->me_psize - copy->mp_upper - PAGEBASE); - - /* reset back to original page */ - if (newindx < split_indx) { - mc->mc_pg[mc->mc_top] = mp; - if (nflags & MDB_RESERVE) { - node = NODEPTR(mp, mc->mc_ki[mc->mc_top]); - if (!(node->mn_flags & F_BIGDATA)) - newdata->mv_data = NODEDATA(node); - } - } else { - mc->mc_pg[mc->mc_top] = rp; - mc->mc_ki[ptop]++; - /* Make sure mc_ki is still valid. - */ - if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && - mc->mc_ki[ptop] >= NUMKEYS(mc->mc_pg[ptop])) { - for (i=0; i<=ptop; i++) { - mc->mc_pg[i] = mn.mc_pg[i]; - mc->mc_ki[i] = mn.mc_ki[i]; - } - } - } - } - - { - /* Adjust other cursors pointing to mp */ - MDB_cursor *m2, *m3; - MDB_dbi dbi = mc->mc_dbi; - int fixup = NUMKEYS(mp); - - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) { - if (mc->mc_flags & C_SUB) - m3 = &m2->mc_xcursor->mx_cursor; - else - m3 = m2; - if (m3 == mc) - continue; - if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) - continue; - if (m3->mc_flags & C_SPLITTING) - continue; - if (new_root) { - int k; - /* root split */ - for (k=m3->mc_top; k>=0; k--) { - m3->mc_ki[k+1] = m3->mc_ki[k]; - m3->mc_pg[k+1] = m3->mc_pg[k]; - } - if (m3->mc_ki[0] >= split_indx) { - m3->mc_ki[0] = 1; - } else { - m3->mc_ki[0] = 0; - } - m3->mc_pg[0] = mc->mc_pg[0]; - m3->mc_snum++; - m3->mc_top++; - } - if (m3->mc_top >= mc->mc_top && m3->mc_pg[mc->mc_top] == mp) { - if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDB_SPLIT_REPLACE)) - m3->mc_ki[mc->mc_top]++; - if (m3->mc_ki[mc->mc_top] >= fixup) { - m3->mc_pg[mc->mc_top] = rp; - m3->mc_ki[mc->mc_top] -= fixup; - m3->mc_ki[ptop] = mn.mc_ki[ptop]; - } - } else if (!did_split && m3->mc_top >= ptop && m3->mc_pg[ptop] == mc->mc_pg[ptop] && - m3->mc_ki[ptop] >= mc->mc_ki[ptop]) { - m3->mc_ki[ptop]++; - } - } - } - DPRINTF(("mp left: %d, rp left: %d", SIZELEFT(mp), SIZELEFT(rp))); - -done: - if (copy) /* tmp page */ - mdb_page_free(env, copy); - if (rc) - mc->mc_txn->mt_flags |= MDB_TXN_ERROR; - return rc; -} - -int -mdb_put(MDB_txn *txn, MDB_dbi dbi, - MDB_val *key, MDB_val *data, unsigned int flags) -{ - MDB_cursor mc; - MDB_xcursor mx; - - if (!key || !data || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - if ((flags & (MDB_NOOVERWRITE|MDB_NODUPDATA|MDB_RESERVE|MDB_APPEND|MDB_APPENDDUP)) != flags) - return EINVAL; - - mdb_cursor_init(&mc, txn, dbi, &mx); - return mdb_cursor_put(&mc, key, data, flags); -} - -#ifndef MDB_WBUF -#define MDB_WBUF (1024*1024) -#endif - - /** State needed for a compacting copy. */ -typedef struct mdb_copy { - pthread_mutex_t mc_mutex; - pthread_cond_t mc_cond; - char *mc_wbuf[2]; - char *mc_over[2]; - MDB_env *mc_env; - MDB_txn *mc_txn; - int mc_wlen[2]; - int mc_olen[2]; - pgno_t mc_next_pgno; - HANDLE mc_fd; - int mc_status; - volatile int mc_new; - int mc_toggle; - -} mdb_copy; - - /** Dedicated writer thread for compacting copy. */ -static THREAD_RET ESECT -mdb_env_copythr(void *arg) -{ - mdb_copy *my = arg; - char *ptr; - int toggle = 0, wsize, rc; -#ifdef _WIN32 - DWORD len; -#define DO_WRITE(rc, fd, ptr, w2, len) rc = WriteFile(fd, ptr, w2, &len, NULL) -#else - int len; -#define DO_WRITE(rc, fd, ptr, w2, len) len = write(fd, ptr, w2); rc = (len >= 0) -#endif - - pthread_mutex_lock(&my->mc_mutex); - my->mc_new = 0; - pthread_cond_signal(&my->mc_cond); - for(;;) { - while (!my->mc_new) - pthread_cond_wait(&my->mc_cond, &my->mc_mutex); - if (my->mc_new < 0) { - my->mc_new = 0; - break; - } - my->mc_new = 0; - wsize = my->mc_wlen[toggle]; - ptr = my->mc_wbuf[toggle]; -again: - while (wsize > 0) { - DO_WRITE(rc, my->mc_fd, ptr, wsize, len); - if (!rc) { - rc = ErrCode(); - break; - } else if (len > 0) { - rc = MDB_SUCCESS; - ptr += len; - wsize -= len; - continue; - } else { - rc = EIO; - break; - } - } - if (rc) { - my->mc_status = rc; - break; - } - /* If there's an overflow page tail, write it too */ - if (my->mc_olen[toggle]) { - wsize = my->mc_olen[toggle]; - ptr = my->mc_over[toggle]; - my->mc_olen[toggle] = 0; - goto again; - } - my->mc_wlen[toggle] = 0; - toggle ^= 1; - pthread_cond_signal(&my->mc_cond); - } - pthread_cond_signal(&my->mc_cond); - pthread_mutex_unlock(&my->mc_mutex); - return (THREAD_RET)0; -#undef DO_WRITE -} - - /** Tell the writer thread there's a buffer ready to write */ -static int ESECT -mdb_env_cthr_toggle(mdb_copy *my, int st) -{ - int toggle = my->mc_toggle ^ 1; - pthread_mutex_lock(&my->mc_mutex); - if (my->mc_status) { - pthread_mutex_unlock(&my->mc_mutex); - return my->mc_status; - } - while (my->mc_new == 1) - pthread_cond_wait(&my->mc_cond, &my->mc_mutex); - my->mc_new = st; - my->mc_toggle = toggle; - pthread_cond_signal(&my->mc_cond); - pthread_mutex_unlock(&my->mc_mutex); - return 0; -} - - /** Depth-first tree traversal for compacting copy. */ -static int ESECT -mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags) -{ - MDB_cursor mc; - MDB_txn *txn = my->mc_txn; - MDB_node *ni; - MDB_page *mo, *mp, *leaf; - char *buf, *ptr; - int rc, toggle; - unsigned int i; - - /* Empty DB, nothing to do */ - if (*pg == P_INVALID) - return MDB_SUCCESS; - - mc.mc_snum = 1; - mc.mc_top = 0; - mc.mc_txn = txn; - - rc = mdb_page_get(my->mc_txn, *pg, &mc.mc_pg[0], NULL); - if (rc) - return rc; - rc = mdb_page_search_root(&mc, NULL, MDB_PS_FIRST); - if (rc) - return rc; - - /* Make cursor pages writable */ - buf = ptr = malloc(my->mc_env->me_psize * mc.mc_snum); - if (buf == NULL) - return ENOMEM; - - for (i=0; imc_env->me_psize); - mc.mc_pg[i] = (MDB_page *)ptr; - ptr += my->mc_env->me_psize; - } - - /* This is writable space for a leaf page. Usually not needed. */ - leaf = (MDB_page *)ptr; - - toggle = my->mc_toggle; - while (mc.mc_snum > 0) { - unsigned n; - mp = mc.mc_pg[mc.mc_top]; - n = NUMKEYS(mp); - - if (IS_LEAF(mp)) { - if (!IS_LEAF2(mp) && !(flags & F_DUPDATA)) { - for (i=0; imn_flags & F_BIGDATA) { - MDB_page *omp; - pgno_t pg; - - /* Need writable leaf */ - if (mp != leaf) { - mc.mc_pg[mc.mc_top] = leaf; - mdb_page_copy(leaf, mp, my->mc_env->me_psize); - mp = leaf; - ni = NODEPTR(mp, i); - } - - memcpy(&pg, NODEDATA(ni), sizeof(pg)); - rc = mdb_page_get(txn, pg, &omp, NULL); - if (rc) - goto done; - if (my->mc_wlen[toggle] >= MDB_WBUF) { - rc = mdb_env_cthr_toggle(my, 1); - if (rc) - goto done; - toggle = my->mc_toggle; - } - mo = (MDB_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]); - memcpy(mo, omp, my->mc_env->me_psize); - mo->mp_pgno = my->mc_next_pgno; - my->mc_next_pgno += omp->mp_pages; - my->mc_wlen[toggle] += my->mc_env->me_psize; - if (omp->mp_pages > 1) { - my->mc_olen[toggle] = my->mc_env->me_psize * (omp->mp_pages - 1); - my->mc_over[toggle] = (char *)omp + my->mc_env->me_psize; - rc = mdb_env_cthr_toggle(my, 1); - if (rc) - goto done; - toggle = my->mc_toggle; - } - memcpy(NODEDATA(ni), &mo->mp_pgno, sizeof(pgno_t)); - } else if (ni->mn_flags & F_SUBDATA) { - MDB_db db; - - /* Need writable leaf */ - if (mp != leaf) { - mc.mc_pg[mc.mc_top] = leaf; - mdb_page_copy(leaf, mp, my->mc_env->me_psize); - mp = leaf; - ni = NODEPTR(mp, i); - } - - memcpy(&db, NODEDATA(ni), sizeof(db)); - my->mc_toggle = toggle; - rc = mdb_env_cwalk(my, &db.md_root, ni->mn_flags & F_DUPDATA); - if (rc) - goto done; - toggle = my->mc_toggle; - memcpy(NODEDATA(ni), &db, sizeof(db)); - } - } - } - } else { - mc.mc_ki[mc.mc_top]++; - if (mc.mc_ki[mc.mc_top] < n) { - pgno_t pg; -again: - ni = NODEPTR(mp, mc.mc_ki[mc.mc_top]); - pg = NODEPGNO(ni); - rc = mdb_page_get(txn, pg, &mp, NULL); - if (rc) - goto done; - mc.mc_top++; - mc.mc_snum++; - mc.mc_ki[mc.mc_top] = 0; - if (IS_BRANCH(mp)) { - /* Whenever we advance to a sibling branch page, - * we must proceed all the way down to its first leaf. - */ - mdb_page_copy(mc.mc_pg[mc.mc_top], mp, my->mc_env->me_psize); - goto again; - } else - mc.mc_pg[mc.mc_top] = mp; - continue; - } - } - if (my->mc_wlen[toggle] >= MDB_WBUF) { - rc = mdb_env_cthr_toggle(my, 1); - if (rc) - goto done; - toggle = my->mc_toggle; - } - mo = (MDB_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]); - mdb_page_copy(mo, mp, my->mc_env->me_psize); - mo->mp_pgno = my->mc_next_pgno++; - my->mc_wlen[toggle] += my->mc_env->me_psize; - if (mc.mc_top) { - /* Update parent if there is one */ - ni = NODEPTR(mc.mc_pg[mc.mc_top-1], mc.mc_ki[mc.mc_top-1]); - SETPGNO(ni, mo->mp_pgno); - mdb_cursor_pop(&mc); - } else { - /* Otherwise we're done */ - *pg = mo->mp_pgno; - break; - } - } -done: - free(buf); - return rc; -} - - /** Copy environment with compaction. */ -static int ESECT -mdb_env_copyfd1(MDB_env *env, HANDLE fd) -{ - MDB_meta *mm; - MDB_page *mp; - mdb_copy my; - MDB_txn *txn = NULL; - pthread_t thr; - int rc; - -#ifdef _WIN32 - my.mc_mutex = CreateMutex(NULL, FALSE, NULL); - my.mc_cond = CreateEvent(NULL, FALSE, FALSE, NULL); - my.mc_wbuf[0] = _aligned_malloc(MDB_WBUF*2, env->me_os_psize); - if (my.mc_wbuf[0] == NULL) - return errno; -#else - pthread_mutex_init(&my.mc_mutex, NULL); - pthread_cond_init(&my.mc_cond, NULL); -#ifdef HAVE_MEMALIGN - my.mc_wbuf[0] = memalign(env->me_os_psize, MDB_WBUF*2); - if (my.mc_wbuf[0] == NULL) - return errno; -#else - rc = posix_memalign((void **)&my.mc_wbuf[0], env->me_os_psize, MDB_WBUF*2); - if (rc) - return rc; -#endif -#endif - memset(my.mc_wbuf[0], 0, MDB_WBUF*2); - my.mc_wbuf[1] = my.mc_wbuf[0] + MDB_WBUF; - my.mc_wlen[0] = 0; - my.mc_wlen[1] = 0; - my.mc_olen[0] = 0; - my.mc_olen[1] = 0; - my.mc_next_pgno = 2; - my.mc_status = 0; - my.mc_new = 1; - my.mc_toggle = 0; - my.mc_env = env; - my.mc_fd = fd; - THREAD_CREATE(thr, mdb_env_copythr, &my); - - rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn); - if (rc) - return rc; - - mp = (MDB_page *)my.mc_wbuf[0]; - memset(mp, 0, 2*env->me_psize); - mp->mp_pgno = 0; - mp->mp_flags = P_META; - mm = (MDB_meta *)METADATA(mp); - mdb_env_init_meta0(env, mm); - mm->mm_address = env->me_metas[0]->mm_address; - - mp = (MDB_page *)(my.mc_wbuf[0] + env->me_psize); - mp->mp_pgno = 1; - mp->mp_flags = P_META; - *(MDB_meta *)METADATA(mp) = *mm; - mm = (MDB_meta *)METADATA(mp); - - /* Count the number of free pages, subtract from lastpg to find - * number of active pages - */ - { - MDB_ID freecount = 0; - MDB_cursor mc; - MDB_val key, data; - mdb_cursor_init(&mc, txn, FREE_DBI, NULL); - while ((rc = mdb_cursor_get(&mc, &key, &data, MDB_NEXT)) == 0) - freecount += *(MDB_ID *)data.mv_data; - freecount += txn->mt_dbs[0].md_branch_pages + - txn->mt_dbs[0].md_leaf_pages + - txn->mt_dbs[0].md_overflow_pages; - - /* Set metapage 1 */ - mm->mm_last_pg = txn->mt_next_pgno - freecount - 1; - mm->mm_dbs[1] = txn->mt_dbs[1]; - if (mm->mm_last_pg > 1) { - mm->mm_dbs[1].md_root = mm->mm_last_pg; - mm->mm_txnid = 1; - } else { - mm->mm_dbs[1].md_root = P_INVALID; - } - } - my.mc_wlen[0] = env->me_psize * 2; - my.mc_txn = txn; - pthread_mutex_lock(&my.mc_mutex); - while(my.mc_new) - pthread_cond_wait(&my.mc_cond, &my.mc_mutex); - pthread_mutex_unlock(&my.mc_mutex); - rc = mdb_env_cwalk(&my, &txn->mt_dbs[1].md_root, 0); - if (rc == MDB_SUCCESS && my.mc_wlen[my.mc_toggle]) - rc = mdb_env_cthr_toggle(&my, 1); - mdb_env_cthr_toggle(&my, -1); - pthread_mutex_lock(&my.mc_mutex); - while(my.mc_new) - pthread_cond_wait(&my.mc_cond, &my.mc_mutex); - pthread_mutex_unlock(&my.mc_mutex); - THREAD_FINISH(thr); - - mdb_txn_abort(txn); -#ifdef _WIN32 - CloseHandle(my.mc_cond); - CloseHandle(my.mc_mutex); - _aligned_free(my.mc_wbuf[0]); -#else - pthread_cond_destroy(&my.mc_cond); - pthread_mutex_destroy(&my.mc_mutex); - free(my.mc_wbuf[0]); -#endif - return rc; -} - - /** Copy environment as-is. */ -static int ESECT -mdb_env_copyfd0(MDB_env *env, HANDLE fd) -{ - MDB_txn *txn = NULL; - int rc; - size_t wsize; - char *ptr; -#ifdef _WIN32 - DWORD len, w2; -#define DO_WRITE(rc, fd, ptr, w2, len) rc = WriteFile(fd, ptr, w2, &len, NULL) -#else - ssize_t len; - size_t w2; -#define DO_WRITE(rc, fd, ptr, w2, len) len = write(fd, ptr, w2); rc = (len >= 0) -#endif - - /* Do the lock/unlock of the reader mutex before starting the - * write txn. Otherwise other read txns could block writers. - */ - rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn); - if (rc) - return rc; - - if (env->me_txns) { - /* We must start the actual read txn after blocking writers */ - mdb_txn_reset0(txn, "reset-stage1"); - - /* Temporarily block writers until we snapshot the meta pages */ - LOCK_MUTEX_W(env); - - rc = mdb_txn_renew0(txn); - if (rc) { - UNLOCK_MUTEX_W(env); - goto leave; - } - } - - wsize = env->me_psize * 2; - ptr = env->me_map; - w2 = wsize; - while (w2 > 0) { - DO_WRITE(rc, fd, ptr, w2, len); - if (!rc) { - rc = ErrCode(); - break; - } else if (len > 0) { - rc = MDB_SUCCESS; - ptr += len; - w2 -= len; - continue; - } else { - /* Non-blocking or async handles are not supported */ - rc = EIO; - break; - } - } - if (env->me_txns) - UNLOCK_MUTEX_W(env); - - if (rc) - goto leave; - - w2 = txn->mt_next_pgno * env->me_psize; - { - size_t fsize = 0; - if ((rc = mdb_fsize(env->me_fd, &fsize))) - goto leave; - if (w2 > fsize) - w2 = fsize; - } - wsize = w2 - wsize; - while (wsize > 0) { - if (wsize > MAX_WRITE) - w2 = MAX_WRITE; - else - w2 = wsize; - DO_WRITE(rc, fd, ptr, w2, len); - if (!rc) { - rc = ErrCode(); - break; - } else if (len > 0) { - rc = MDB_SUCCESS; - ptr += len; - wsize -= len; - continue; - } else { - rc = EIO; - break; - } - } - -leave: - mdb_txn_abort(txn); - return rc; -} - -int ESECT -mdb_env_copyfd2(MDB_env *env, HANDLE fd, unsigned int flags) -{ - if (flags & MDB_CP_COMPACT) - return mdb_env_copyfd1(env, fd); - else - return mdb_env_copyfd0(env, fd); -} - -int ESECT -mdb_env_copyfd(MDB_env *env, HANDLE fd) -{ - return mdb_env_copyfd2(env, fd, 0); -} - -int ESECT -mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags) -{ - int rc, len; - char *lpath; - HANDLE newfd = INVALID_HANDLE_VALUE; - - if (env->me_flags & MDB_NOSUBDIR) { - lpath = (char *)path; - } else { - len = strlen(path); - len += sizeof(DATANAME); - lpath = malloc(len); - if (!lpath) - return ENOMEM; - sprintf(lpath, "%s" DATANAME, path); - } - - /* The destination path must exist, but the destination file must not. - * We don't want the OS to cache the writes, since the source data is - * already in the OS cache. - */ -#ifdef _WIN32 - newfd = CreateFile(lpath, GENERIC_WRITE, 0, NULL, CREATE_NEW, - FILE_FLAG_NO_BUFFERING|FILE_FLAG_WRITE_THROUGH, NULL); -#else - newfd = open(lpath, O_WRONLY|O_CREAT|O_EXCL, 0666); -#endif - if (newfd == INVALID_HANDLE_VALUE) { - rc = ErrCode(); - goto leave; - } - - if (env->me_psize >= env->me_os_psize) { -#ifdef O_DIRECT - /* Set O_DIRECT if the file system supports it */ - if ((rc = fcntl(newfd, F_GETFL)) != -1) - (void) fcntl(newfd, F_SETFL, rc | O_DIRECT); -#endif -#ifdef F_NOCACHE /* __APPLE__ */ - rc = fcntl(newfd, F_NOCACHE, 1); - if (rc) { - rc = ErrCode(); - goto leave; - } -#endif - } - - rc = mdb_env_copyfd2(env, newfd, flags); - -leave: - if (!(env->me_flags & MDB_NOSUBDIR)) - free(lpath); - if (newfd != INVALID_HANDLE_VALUE) - if (close(newfd) < 0 && rc == MDB_SUCCESS) - rc = ErrCode(); - - return rc; -} - -int ESECT -mdb_env_copy(MDB_env *env, const char *path) -{ - return mdb_env_copy2(env, path, 0); -} - -int ESECT -mdb_env_set_flags(MDB_env *env, unsigned int flag, int onoff) -{ - if ((flag & CHANGEABLE) != flag) - return EINVAL; - if (onoff) - env->me_flags |= flag; - else - env->me_flags &= ~flag; - return MDB_SUCCESS; -} - -int ESECT -mdb_env_get_flags(MDB_env *env, unsigned int *arg) -{ - if (!env || !arg) - return EINVAL; - - *arg = env->me_flags; - return MDB_SUCCESS; -} - -int ESECT -mdb_env_set_userctx(MDB_env *env, void *ctx) -{ - if (!env) - return EINVAL; - env->me_userctx = ctx; - return MDB_SUCCESS; -} - -void * ESECT -mdb_env_get_userctx(MDB_env *env) -{ - return env ? env->me_userctx : NULL; -} - -int ESECT -mdb_env_set_assert(MDB_env *env, MDB_assert_func *func) -{ - if (!env) - return EINVAL; -#ifndef NDEBUG - env->me_assert_func = func; -#endif - return MDB_SUCCESS; -} - -int ESECT -mdb_env_get_path(MDB_env *env, const char **arg) -{ - if (!env || !arg) - return EINVAL; - - *arg = env->me_path; - return MDB_SUCCESS; -} - -int ESECT -mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *arg) -{ - if (!env || !arg) - return EINVAL; - - *arg = env->me_fd; - return MDB_SUCCESS; -} - -/** Common code for #mdb_stat() and #mdb_env_stat(). - * @param[in] env the environment to operate in. - * @param[in] db the #MDB_db record containing the stats to return. - * @param[out] arg the address of an #MDB_stat structure to receive the stats. - * @return 0, this function always succeeds. - */ -static int ESECT -mdb_stat0(MDB_env *env, MDB_db *db, MDB_stat *arg) -{ - arg->ms_psize = env->me_psize; - arg->ms_depth = db->md_depth; - arg->ms_branch_pages = db->md_branch_pages; - arg->ms_leaf_pages = db->md_leaf_pages; - arg->ms_overflow_pages = db->md_overflow_pages; - arg->ms_entries = db->md_entries; - - return MDB_SUCCESS; -} - -int ESECT -mdb_env_stat(MDB_env *env, MDB_stat *arg) -{ - int toggle; - - if (env == NULL || arg == NULL) - return EINVAL; - - toggle = mdb_env_pick_meta(env); - - return mdb_stat0(env, &env->me_metas[toggle]->mm_dbs[MAIN_DBI], arg); -} - -int ESECT -mdb_env_info(MDB_env *env, MDB_envinfo *arg) -{ - int toggle; - - if (env == NULL || arg == NULL) - return EINVAL; - - toggle = mdb_env_pick_meta(env); - arg->me_mapaddr = env->me_metas[toggle]->mm_address; - arg->me_mapsize = env->me_mapsize; - arg->me_maxreaders = env->me_maxreaders; - - /* me_numreaders may be zero if this process never used any readers. Use - * the shared numreader count if it exists. - */ - arg->me_numreaders = env->me_txns ? env->me_txns->mti_numreaders : env->me_numreaders; - - arg->me_last_pgno = env->me_metas[toggle]->mm_last_pg; - arg->me_last_txnid = env->me_metas[toggle]->mm_txnid; - return MDB_SUCCESS; -} - -/** Set the default comparison functions for a database. - * Called immediately after a database is opened to set the defaults. - * The user can then override them with #mdb_set_compare() or - * #mdb_set_dupsort(). - * @param[in] txn A transaction handle returned by #mdb_txn_begin() - * @param[in] dbi A database handle returned by #mdb_dbi_open() - */ -static void -mdb_default_cmp(MDB_txn *txn, MDB_dbi dbi) -{ - uint16_t f = txn->mt_dbs[dbi].md_flags; - - txn->mt_dbxs[dbi].md_cmp = - (f & MDB_REVERSEKEY) ? mdb_cmp_memnr : - (f & MDB_INTEGERKEY) ? mdb_cmp_cint : mdb_cmp_memn; - - txn->mt_dbxs[dbi].md_dcmp = - !(f & MDB_DUPSORT) ? 0 : - ((f & MDB_INTEGERDUP) - ? ((f & MDB_DUPFIXED) ? mdb_cmp_int : mdb_cmp_cint) - : ((f & MDB_REVERSEDUP) ? mdb_cmp_memnr : mdb_cmp_memn)); -} - -int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi) -{ - MDB_val key, data; - MDB_dbi i; - MDB_cursor mc; - MDB_db dummy; - int rc, dbflag, exact; - unsigned int unused = 0, seq; - size_t len; - - if (txn->mt_dbxs[FREE_DBI].md_cmp == NULL) { - mdb_default_cmp(txn, FREE_DBI); - } - - if ((flags & VALID_FLAGS) != flags) - return EINVAL; - if (txn->mt_flags & MDB_TXN_ERROR) - return MDB_BAD_TXN; - - /* main DB? */ - if (!name) { - *dbi = MAIN_DBI; - if (flags & PERSISTENT_FLAGS) { - uint16_t f2 = flags & PERSISTENT_FLAGS; - /* make sure flag changes get committed */ - if ((txn->mt_dbs[MAIN_DBI].md_flags | f2) != txn->mt_dbs[MAIN_DBI].md_flags) { - txn->mt_dbs[MAIN_DBI].md_flags |= f2; - txn->mt_flags |= MDB_TXN_DIRTY; - } - } - mdb_default_cmp(txn, MAIN_DBI); - return MDB_SUCCESS; - } - - if (txn->mt_dbxs[MAIN_DBI].md_cmp == NULL) { - mdb_default_cmp(txn, MAIN_DBI); - } - - /* Is the DB already open? */ - len = strlen(name); - for (i=2; imt_numdbs; i++) { - if (!txn->mt_dbxs[i].md_name.mv_size) { - /* Remember this free slot */ - if (!unused) unused = i; - continue; - } - if (len == txn->mt_dbxs[i].md_name.mv_size && - !strncmp(name, txn->mt_dbxs[i].md_name.mv_data, len)) { - *dbi = i; - return MDB_SUCCESS; - } - } - - /* If no free slot and max hit, fail */ - if (!unused && txn->mt_numdbs >= txn->mt_env->me_maxdbs) - return MDB_DBS_FULL; - - /* Cannot mix named databases with some mainDB flags */ - if (txn->mt_dbs[MAIN_DBI].md_flags & (MDB_DUPSORT|MDB_INTEGERKEY)) - return (flags & MDB_CREATE) ? MDB_INCOMPATIBLE : MDB_NOTFOUND; - - /* Find the DB info */ - dbflag = DB_NEW|DB_VALID; - exact = 0; - key.mv_size = len; - key.mv_data = (void *)name; - mdb_cursor_init(&mc, txn, MAIN_DBI, NULL); - rc = mdb_cursor_set(&mc, &key, &data, MDB_SET, &exact); - if (rc == MDB_SUCCESS) { - /* make sure this is actually a DB */ - MDB_node *node = NODEPTR(mc.mc_pg[mc.mc_top], mc.mc_ki[mc.mc_top]); - if (!(node->mn_flags & F_SUBDATA)) - return MDB_INCOMPATIBLE; - } else if (rc == MDB_NOTFOUND && (flags & MDB_CREATE)) { - /* Create if requested */ - data.mv_size = sizeof(MDB_db); - data.mv_data = &dummy; - memset(&dummy, 0, sizeof(dummy)); - dummy.md_root = P_INVALID; - dummy.md_flags = flags & PERSISTENT_FLAGS; - rc = mdb_cursor_put(&mc, &key, &data, F_SUBDATA); - dbflag |= DB_DIRTY; - } - - /* OK, got info, add to table */ - if (rc == MDB_SUCCESS) { - unsigned int slot = unused ? unused : txn->mt_numdbs; - txn->mt_dbxs[slot].md_name.mv_data = strdup(name); - txn->mt_dbxs[slot].md_name.mv_size = len; - txn->mt_dbxs[slot].md_rel = NULL; - txn->mt_dbflags[slot] = dbflag; - /* txn-> and env-> are the same in read txns, use - * tmp variable to avoid undefined assignment - */ - seq = ++txn->mt_env->me_dbiseqs[slot]; - txn->mt_dbiseqs[slot] = seq; - - memcpy(&txn->mt_dbs[slot], data.mv_data, sizeof(MDB_db)); - *dbi = slot; - mdb_default_cmp(txn, slot); - if (!unused) { - txn->mt_numdbs++; - } - } - - return rc; -} - -int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *arg) -{ - if (!arg || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - if (txn->mt_flags & MDB_TXN_ERROR) - return MDB_BAD_TXN; - - if (txn->mt_dbflags[dbi] & DB_STALE) { - MDB_cursor mc; - MDB_xcursor mx; - /* Stale, must read the DB's root. cursor_init does it for us. */ - mdb_cursor_init(&mc, txn, dbi, &mx); - } - return mdb_stat0(txn->mt_env, &txn->mt_dbs[dbi], arg); -} - -void mdb_dbi_close(MDB_env *env, MDB_dbi dbi) -{ - char *ptr; - if (dbi <= MAIN_DBI || dbi >= env->me_maxdbs) - return; - ptr = env->me_dbxs[dbi].md_name.mv_data; - /* If there was no name, this was already closed */ - if (ptr) { - env->me_dbxs[dbi].md_name.mv_data = NULL; - env->me_dbxs[dbi].md_name.mv_size = 0; - env->me_dbflags[dbi] = 0; - env->me_dbiseqs[dbi]++; - free(ptr); - } -} - -int mdb_dbi_flags(MDB_txn *txn, MDB_dbi dbi, unsigned int *flags) -{ - /* We could return the flags for the FREE_DBI too but what's the point? */ - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - *flags = txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS; - return MDB_SUCCESS; -} - -/** Add all the DB's pages to the free list. - * @param[in] mc Cursor on the DB to free. - * @param[in] subs non-Zero to check for sub-DBs in this DB. - * @return 0 on success, non-zero on failure. - */ -static int -mdb_drop0(MDB_cursor *mc, int subs) -{ - int rc; - - rc = mdb_page_search(mc, NULL, MDB_PS_FIRST); - if (rc == MDB_SUCCESS) { - MDB_txn *txn = mc->mc_txn; - MDB_node *ni; - MDB_cursor mx; - unsigned int i; - - /* LEAF2 pages have no nodes, cannot have sub-DBs */ - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) - mdb_cursor_pop(mc); - - mdb_cursor_copy(mc, &mx); - while (mc->mc_snum > 0) { - MDB_page *mp = mc->mc_pg[mc->mc_top]; - unsigned n = NUMKEYS(mp); - if (IS_LEAF(mp)) { - for (i=0; imn_flags & F_BIGDATA) { - MDB_page *omp; - pgno_t pg; - memcpy(&pg, NODEDATA(ni), sizeof(pg)); - rc = mdb_page_get(txn, pg, &omp, NULL); - if (rc != 0) - goto done; - mdb_cassert(mc, IS_OVERFLOW(omp)); - rc = mdb_midl_append_range(&txn->mt_free_pgs, - pg, omp->mp_pages); - if (rc) - goto done; - } else if (subs && (ni->mn_flags & F_SUBDATA)) { - mdb_xcursor_init1(mc, ni); - rc = mdb_drop0(&mc->mc_xcursor->mx_cursor, 0); - if (rc) - goto done; - } - } - } else { - if ((rc = mdb_midl_need(&txn->mt_free_pgs, n)) != 0) - goto done; - for (i=0; imt_free_pgs, pg); - } - } - if (!mc->mc_top) - break; - mc->mc_ki[mc->mc_top] = i; - rc = mdb_cursor_sibling(mc, 1); - if (rc) { - if (rc != MDB_NOTFOUND) - goto done; - /* no more siblings, go back to beginning - * of previous level. - */ - mdb_cursor_pop(mc); - mc->mc_ki[0] = 0; - for (i=1; imc_snum; i++) { - mc->mc_ki[i] = 0; - mc->mc_pg[i] = mx.mc_pg[i]; - } - } - } - /* free it */ - rc = mdb_midl_append(&txn->mt_free_pgs, mc->mc_db->md_root); -done: - if (rc) - txn->mt_flags |= MDB_TXN_ERROR; - } else if (rc == MDB_NOTFOUND) { - rc = MDB_SUCCESS; - } - return rc; -} - -int mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del) -{ - MDB_cursor *mc, *m2; - int rc; - - if ((unsigned)del > 1 || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) - return EACCES; - - if (dbi > MAIN_DBI && TXN_DBI_CHANGED(txn, dbi)) - return MDB_BAD_DBI; - - rc = mdb_cursor_open(txn, dbi, &mc); - if (rc) - return rc; - - rc = mdb_drop0(mc, mc->mc_db->md_flags & MDB_DUPSORT); - /* Invalidate the dropped DB's cursors */ - for (m2 = txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) - m2->mc_flags &= ~(C_INITIALIZED|C_EOF); - if (rc) - goto leave; - - /* Can't delete the main DB */ - if (del && dbi > MAIN_DBI) { - rc = mdb_del0(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL, 0); - if (!rc) { - txn->mt_dbflags[dbi] = DB_STALE; - mdb_dbi_close(txn->mt_env, dbi); - } else { - txn->mt_flags |= MDB_TXN_ERROR; - } - } else { - /* reset the DB record, mark it dirty */ - txn->mt_dbflags[dbi] |= DB_DIRTY; - txn->mt_dbs[dbi].md_depth = 0; - txn->mt_dbs[dbi].md_branch_pages = 0; - txn->mt_dbs[dbi].md_leaf_pages = 0; - txn->mt_dbs[dbi].md_overflow_pages = 0; - txn->mt_dbs[dbi].md_entries = 0; - txn->mt_dbs[dbi].md_root = P_INVALID; - - txn->mt_flags |= MDB_TXN_DIRTY; - } -leave: - mdb_cursor_close(mc); - return rc; -} - -int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) -{ - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - txn->mt_dbxs[dbi].md_cmp = cmp; - return MDB_SUCCESS; -} - -int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp) -{ - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - txn->mt_dbxs[dbi].md_dcmp = cmp; - return MDB_SUCCESS; -} - -int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel) -{ - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - txn->mt_dbxs[dbi].md_rel = rel; - return MDB_SUCCESS; -} - -int mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx) -{ - if (dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi)) - return EINVAL; - - txn->mt_dbxs[dbi].md_relctx = ctx; - return MDB_SUCCESS; -} - -int ESECT -mdb_env_get_maxkeysize(MDB_env *env) -{ - return ENV_MAXKEY(env); -} - -int ESECT -mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx) -{ - unsigned int i, rdrs; - MDB_reader *mr; - char buf[64]; - int rc = 0, first = 1; - - if (!env || !func) - return -1; - if (!env->me_txns) { - return func("(no reader locks)\n", ctx); - } - rdrs = env->me_txns->mti_numreaders; - mr = env->me_txns->mti_readers; - for (i=0; i> 1; - cursor = base + pivot + 1; - val = pid - ids[cursor]; - - if( val < 0 ) { - n = pivot; - - } else if ( val > 0 ) { - base = cursor; - n -= pivot + 1; - - } else { - /* found, so it's a duplicate */ - return -1; - } - } - - if( val > 0 ) { - ++cursor; - } - ids[0]++; - for (n = ids[0]; n > cursor; n--) - ids[n] = ids[n-1]; - ids[n] = pid; - return 0; -} - -int ESECT -mdb_reader_check(MDB_env *env, int *dead) -{ - unsigned int i, j, rdrs; - MDB_reader *mr; - MDB_PID_T *pids, pid; - int count = 0; - - if (!env) - return EINVAL; - if (dead) - *dead = 0; - if (!env->me_txns) - return MDB_SUCCESS; - rdrs = env->me_txns->mti_numreaders; - pids = malloc((rdrs+1) * sizeof(MDB_PID_T)); - if (!pids) - return ENOMEM; - pids[0] = 0; - mr = env->me_txns->mti_readers; - for (i=0; ime_pid) { - pid = mr[i].mr_pid; - if (mdb_pid_insert(pids, pid) == 0) { - if (!mdb_reader_pid(env, Pidcheck, pid)) { - LOCK_MUTEX_R(env); - /* Recheck, a new process may have reused pid */ - if (!mdb_reader_pid(env, Pidcheck, pid)) { - for (j=i; j diff --git a/external/db_drivers/liblmdb64/mdb_copy.c b/external/db_drivers/liblmdb64/mdb_copy.c deleted file mode 100644 index f37ccbcc2..000000000 --- a/external/db_drivers/liblmdb64/mdb_copy.c +++ /dev/null @@ -1,82 +0,0 @@ -/* mdb_copy.c - memory-mapped database backup tool */ -/* - * Copyright 2012-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ -#ifdef _WIN32 -#include -#define MDB_STDOUT GetStdHandle(STD_OUTPUT_HANDLE) -#else -#define MDB_STDOUT 1 -#endif -#include -#include -#include -#include "lmdb.h" - -static void -sighandle(int sig) -{ -} - -int main(int argc,char * argv[]) -{ - int rc; - MDB_env *env; - const char *progname = argv[0], *act; - unsigned flags = MDB_RDONLY; - unsigned cpflags = 0; - - for (; argc > 1 && argv[1][0] == '-'; argc--, argv++) { - if (argv[1][1] == 'n' && argv[1][2] == '\0') - flags |= MDB_NOSUBDIR; - else if (argv[1][1] == 'c' && argv[1][2] == '\0') - cpflags |= MDB_CP_COMPACT; - else if (argv[1][1] == 'V' && argv[1][2] == '\0') { - printf("%s\n", MDB_VERSION_STRING); - exit(0); - } else - argc = 0; - } - - if (argc<2 || argc>3) { - fprintf(stderr, "usage: %s [-V] [-c] [-n] srcpath [dstpath]\n", progname); - exit(EXIT_FAILURE); - } - -#ifdef SIGPIPE - signal(SIGPIPE, sighandle); -#endif -#ifdef SIGHUP - signal(SIGHUP, sighandle); -#endif - signal(SIGINT, sighandle); - signal(SIGTERM, sighandle); - - act = "opening environment"; - rc = mdb_env_create(&env); - if (rc == MDB_SUCCESS) { - rc = mdb_env_open(env, argv[1], flags, 0600); - } - if (rc == MDB_SUCCESS) { - act = "copying"; - if (argc == 2) - rc = mdb_env_copyfd2(env, MDB_STDOUT, cpflags); - else - rc = mdb_env_copy2(env, argv[2], cpflags); - } - if (rc) - fprintf(stderr, "%s: %s failed, error %d (%s)\n", - progname, act, rc, mdb_strerror(rc)); - mdb_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/external/db_drivers/liblmdb64/mdb_dump.1 b/external/db_drivers/liblmdb64/mdb_dump.1 deleted file mode 100644 index dd545049b..000000000 --- a/external/db_drivers/liblmdb64/mdb_dump.1 +++ /dev/null @@ -1,75 +0,0 @@ -.TH MDB_DUMP 1 "2014/06/20" "LMDB 0.9.14" -.\" Copyright 2014-2015 Howard Chu, Symas Corp. All Rights Reserved. -.\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.SH NAME -mdb_dump \- LMDB environment export tool -.SH SYNOPSIS -.B mdb_dump -.BR \ envpath -[\c -.BR \-V ] -[\c -.BI \-f \ file\fR] -[\c -.BR \-l ] -[\c -.BR \-n ] -[\c -.BR \-p ] -[\c -.BR \-a \ | -.BI \-s \ subdb\fR] -.SH DESCRIPTION -The -.B mdb_dump -utility reads a database and writes its contents to the -standard output using a portable flat-text format -understood by the -.BR mdb_load (1) -utility. -.SH OPTIONS -.TP -.BR \-V -Write the library version number to the standard output, and exit. -.TP -.BR \-f \ file -Write to the specified file instead of to the standard output. -.TP -.BR \-l -List the databases stored in the environment. Just the -names will be listed, no data will be output. -.TP -.BR \-n -Dump an LMDB database which does not use subdirectories. -.TP -.BR \-p -If characters in either the key or data items are printing characters (as -defined by isprint(3)), output them directly. This option permits users to -use standard text editors and tools to modify the contents of databases. - -Note: different systems may have different notions about what characters -are considered printing characters, and databases dumped in this manner may -be less portable to external systems. -.TP -.BR \-a -Dump all of the subdatabases in the environment. -.TP -.BR \-s \ subdb -Dump a specific subdatabase. If no database is specified, only the main database is dumped. -.SH DIAGNOSTICS -Exit status is zero if no errors occur. -Errors result in a non-zero exit status and -a diagnostic message being written to standard error. - -Dumping and reloading databases that use user-defined comparison functions -will result in new databases that use the default comparison functions. -\fBIn this case it is quite likely that the reloaded database will be -damaged beyond repair permitting neither record storage nor retrieval.\fP - -The only available workaround is to modify the source for the -.BR mdb_load (1) -utility to load the database using the correct comparison functions. -.SH "SEE ALSO" -.BR mdb_load (1) -.SH AUTHOR -Howard Chu of Symas Corporation diff --git a/external/db_drivers/liblmdb64/mdb_dump.c b/external/db_drivers/liblmdb64/mdb_dump.c deleted file mode 100644 index 7202d865b..000000000 --- a/external/db_drivers/liblmdb64/mdb_dump.c +++ /dev/null @@ -1,317 +0,0 @@ -/* mdb_dump.c - memory-mapped database dump tool */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ -#include -#include -#include -#include -#include -#include -#include -#include "lmdb.h" - -#ifdef _WIN32 -#define Z "I" -#else -#define Z "z" -#endif - -#define PRINT 1 -static int mode; - -typedef struct flagbit { - int bit; - char *name; -} flagbit; - -flagbit dbflags[] = { - { MDB_REVERSEKEY, "reversekey" }, - { MDB_DUPSORT, "dupsort" }, - { MDB_INTEGERKEY, "integerkey" }, - { MDB_DUPFIXED, "dupfixed" }, - { MDB_INTEGERDUP, "integerdup" }, - { MDB_REVERSEDUP, "reversedup" }, - { 0, NULL } -}; - -static volatile sig_atomic_t gotsig; - -static void dumpsig( int sig ) -{ - gotsig=1; -} - -static const char hexc[] = "0123456789abcdef"; - -static void hex(unsigned char c) -{ - putchar(hexc[c >> 4]); - putchar(hexc[c & 0xf]); -} - -static void text(MDB_val *v) -{ - unsigned char *c, *end; - - putchar(' '); - c = v->mv_data; - end = c + v->mv_size; - while (c < end) { - if (isprint(*c)) { - putchar(*c); - } else { - putchar('\\'); - hex(*c); - } - c++; - } - putchar('\n'); -} - -static void byte(MDB_val *v) -{ - unsigned char *c, *end; - - putchar(' '); - c = v->mv_data; - end = c + v->mv_size; - while (c < end) { - hex(*c++); - } - putchar('\n'); -} - -/* Dump in BDB-compatible format */ -static int dumpit(MDB_txn *txn, MDB_dbi dbi, char *name) -{ - MDB_cursor *mc; - MDB_stat ms; - MDB_val key, data; - MDB_envinfo info; - unsigned int flags; - int rc, i; - - rc = mdb_dbi_flags(txn, dbi, &flags); - if (rc) return rc; - - rc = mdb_stat(txn, dbi, &ms); - if (rc) return rc; - - rc = mdb_env_info(mdb_txn_env(txn), &info); - if (rc) return rc; - - printf("VERSION=3\n"); - printf("format=%s\n", mode & PRINT ? "print" : "bytevalue"); - if (name) - printf("database=%s\n", name); - printf("type=btree\n"); - printf("mapsize=%" Z "u\n", info.me_mapsize); - if (info.me_mapaddr) - printf("mapaddr=%p\n", info.me_mapaddr); - printf("maxreaders=%u\n", info.me_maxreaders); - - if (flags & MDB_DUPSORT) - printf("duplicates=1\n"); - - for (i=0; dbflags[i].bit; i++) - if (flags & dbflags[i].bit) - printf("%s=1\n", dbflags[i].name); - - printf("db_pagesize=%d\n", ms.ms_psize); - printf("HEADER=END\n"); - - rc = mdb_cursor_open(txn, dbi, &mc); - if (rc) return rc; - - while ((rc = mdb_cursor_get(mc, &key, &data, MDB_NEXT) == MDB_SUCCESS)) { - if (gotsig) { - rc = EINTR; - break; - } - if (mode & PRINT) { - text(&key); - text(&data); - } else { - byte(&key); - byte(&data); - } - } - printf("DATA=END\n"); - if (rc == MDB_NOTFOUND) - rc = MDB_SUCCESS; - - return rc; -} - -static void usage(char *prog) -{ - fprintf(stderr, "usage: %s dbpath [-V] [-f output] [-l] [-n] [-p] [-a|-s subdb]\n", prog); - exit(EXIT_FAILURE); -} - -int main(int argc, char *argv[]) -{ - int i, rc; - MDB_env *env; - MDB_txn *txn; - MDB_dbi dbi; - char *prog = argv[0]; - char *envname; - char *subname = NULL; - int alldbs = 0, envflags = 0, list = 0; - - if (argc < 2) { - usage(prog); - } - - /* -a: dump main DB and all subDBs - * -s: dump only the named subDB - * -n: use NOSUBDIR flag on env_open - * -p: use printable characters - * -f: write to file instead of stdout - * -V: print version and exit - * (default) dump only the main DB - */ - while ((i = getopt(argc, argv, "af:lnps:V")) != EOF) { - switch(i) { - case 'V': - printf("%s\n", MDB_VERSION_STRING); - exit(0); - break; - case 'l': - list = 1; - /*FALLTHROUGH*/; - case 'a': - if (subname) - usage(prog); - alldbs++; - break; - case 'f': - if (freopen(optarg, "w", stdout) == NULL) { - fprintf(stderr, "%s: %s: reopen: %s\n", - prog, optarg, strerror(errno)); - exit(EXIT_FAILURE); - } - break; - case 'n': - envflags |= MDB_NOSUBDIR; - break; - case 'p': - mode |= PRINT; - break; - case 's': - if (alldbs) - usage(prog); - subname = optarg; - break; - default: - usage(prog); - } - } - - if (optind != argc - 1) - usage(prog); - -#ifdef SIGPIPE - signal(SIGPIPE, dumpsig); -#endif -#ifdef SIGHUP - signal(SIGHUP, dumpsig); -#endif - signal(SIGINT, dumpsig); - signal(SIGTERM, dumpsig); - - envname = argv[optind]; - rc = mdb_env_create(&env); - if (rc) { - fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc)); - return EXIT_FAILURE; - } - - if (alldbs || subname) { - mdb_env_set_maxdbs(env, 2); - } - - rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664); - if (rc) { - fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto env_close; - } - - rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn); - if (rc) { - fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc)); - goto env_close; - } - - rc = mdb_open(txn, subname, 0, &dbi); - if (rc) { - fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - - if (alldbs) { - MDB_cursor *cursor; - MDB_val key; - int count = 0; - - rc = mdb_cursor_open(txn, dbi, &cursor); - if (rc) { - fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) { - char *str; - MDB_dbi db2; - if (memchr(key.mv_data, '\0', key.mv_size)) - continue; - count++; - str = malloc(key.mv_size+1); - memcpy(str, key.mv_data, key.mv_size); - str[key.mv_size] = '\0'; - rc = mdb_open(txn, str, 0, &db2); - if (rc == MDB_SUCCESS) { - if (list) { - printf("%s\n", str); - list++; - } else { - rc = dumpit(txn, db2, str); - if (rc) - break; - } - mdb_close(env, db2); - } - free(str); - if (rc) continue; - } - mdb_cursor_close(cursor); - if (!count) { - fprintf(stderr, "%s: %s does not contain multiple databases\n", prog, envname); - rc = MDB_NOTFOUND; - } else if (rc == MDB_NOTFOUND) { - rc = MDB_SUCCESS; - } - } else { - rc = dumpit(txn, dbi, subname); - } - if (rc && rc != MDB_NOTFOUND) - fprintf(stderr, "%s: %s: %s\n", prog, envname, mdb_strerror(rc)); - - mdb_close(env, dbi); -txn_abort: - mdb_txn_abort(txn); -env_close: - mdb_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/external/db_drivers/liblmdb64/mdb_load.1 b/external/db_drivers/liblmdb64/mdb_load.1 deleted file mode 100644 index 511ec552b..000000000 --- a/external/db_drivers/liblmdb64/mdb_load.1 +++ /dev/null @@ -1,77 +0,0 @@ -.TH MDB_LOAD 1 "2014/06/20" "LMDB 0.9.14" -.\" Copyright 2014-2015 Howard Chu, Symas Corp. All Rights Reserved. -.\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.SH NAME -mdb_load \- LMDB environment import tool -.SH SYNOPSIS -.B mdb_load -.BR \ envpath -[\c -.BR \-V ] -[\c -.BI \-f \ file\fR] -[\c -.BR \-n ] -[\c -.BI \-s \ subdb\fR] -[\c -.BR \-N ] -[\c -.BR \-T ] -.SH DESCRIPTION -The -.B mdb_load -utility reads from the standard input and loads it into the -LMDB environment -.BR envpath . - -The input to -.B mdb_load -must be in the output format specified by the -.BR mdb_dump (1) -utility or as specified by the -.B -T -option below. -.SH OPTIONS -.TP -.BR \-V -Write the library version number to the standard output, and exit. -.TP -.BR \-f \ file -Read from the specified file instead of from the standard input. -.TP -.BR \-n -Load an LMDB database which does not use subdirectories. -.TP -.BR \-s \ subdb -Load a specific subdatabase. If no database is specified, data is loaded into the main database. -.TP -.BR \-N -Don't overwrite existing records when loading into an already existing database; just skip them. -.TP -.BR \-T -Load data from simple text files. The input must be paired lines of text, where the first -line of the pair is the key item, and the second line of the pair is its corresponding -data item. - -A simple escape mechanism, where newline and backslash (\\) characters are special, is -applied to the text input. Newline characters are interpreted as record separators. -Backslash characters in the text will be interpreted in one of two ways: If the backslash -character precedes another backslash character, the pair will be interpreted as a literal -backslash. If the backslash character precedes any other character, the two characters -following the backslash will be interpreted as a hexadecimal specification of a single -character; for example, \\0a is a newline character in the ASCII character set. - -For this reason, any backslash or newline characters that naturally occur in the text -input must be escaped to avoid misinterpretation by -.BR mdb_load . - -.SH DIAGNOSTICS -Exit status is zero if no errors occur. -Errors result in a non-zero exit status and -a diagnostic message being written to standard error. - -.SH "SEE ALSO" -.BR mdb_dump (1) -.SH AUTHOR -Howard Chu of Symas Corporation diff --git a/external/db_drivers/liblmdb64/mdb_load.c b/external/db_drivers/liblmdb64/mdb_load.c deleted file mode 100644 index 1f6ce0b7e..000000000 --- a/external/db_drivers/liblmdb64/mdb_load.c +++ /dev/null @@ -1,454 +0,0 @@ -/* mdb_load.c - memory-mapped database load tool */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ -#include -#include -#include -#include -#include -#include -#include "lmdb.h" - -#define PRINT 1 -#define NOHDR 2 -static int mode; - -static char *subname = NULL; - -static size_t lineno; -static int version; - -static int flags; - -static char *prog; - -static int Eof; - -static MDB_envinfo info; - -static MDB_val kbuf, dbuf; - -#ifdef _WIN32 -#define Z "I" -#else -#define Z "z" -#endif - -#define STRLENOF(s) (sizeof(s)-1) - -typedef struct flagbit { - int bit; - char *name; - int len; -} flagbit; - -#define S(s) s, STRLENOF(s) - -flagbit dbflags[] = { - { MDB_REVERSEKEY, S("reversekey") }, - { MDB_DUPSORT, S("dupsort") }, - { MDB_INTEGERKEY, S("integerkey") }, - { MDB_DUPFIXED, S("dupfixed") }, - { MDB_INTEGERDUP, S("integerdup") }, - { MDB_REVERSEDUP, S("reversedup") }, - { 0, NULL, 0 } -}; - -static void readhdr(void) -{ - char *ptr; - - while (fgets(dbuf.mv_data, dbuf.mv_size, stdin) != NULL) { - lineno++; - if (!strncmp(dbuf.mv_data, "VERSION=", STRLENOF("VERSION="))) { - version=atoi((char *)dbuf.mv_data+STRLENOF("VERSION=")); - if (version > 3) { - fprintf(stderr, "%s: line %" Z "d: unsupported VERSION %d\n", - prog, lineno, version); - exit(EXIT_FAILURE); - } - } else if (!strncmp(dbuf.mv_data, "HEADER=END", STRLENOF("HEADER=END"))) { - break; - } else if (!strncmp(dbuf.mv_data, "format=", STRLENOF("format="))) { - if (!strncmp((char *)dbuf.mv_data+STRLENOF("FORMAT="), "print", STRLENOF("print"))) - mode |= PRINT; - else if (strncmp((char *)dbuf.mv_data+STRLENOF("FORMAT="), "bytevalue", STRLENOF("bytevalue"))) { - fprintf(stderr, "%s: line %" Z "d: unsupported FORMAT %s\n", - prog, lineno, (char *)dbuf.mv_data+STRLENOF("FORMAT=")); - exit(EXIT_FAILURE); - } - } else if (!strncmp(dbuf.mv_data, "database=", STRLENOF("database="))) { - ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size); - if (ptr) *ptr = '\0'; - if (subname) free(subname); - subname = strdup((char *)dbuf.mv_data+STRLENOF("database=")); - } else if (!strncmp(dbuf.mv_data, "type=", STRLENOF("type="))) { - if (strncmp((char *)dbuf.mv_data+STRLENOF("type="), "btree", STRLENOF("btree"))) { - fprintf(stderr, "%s: line %" Z "d: unsupported type %s\n", - prog, lineno, (char *)dbuf.mv_data+STRLENOF("type=")); - exit(EXIT_FAILURE); - } - } else if (!strncmp(dbuf.mv_data, "mapaddr=", STRLENOF("mapaddr="))) { - int i; - ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size); - if (ptr) *ptr = '\0'; - i = sscanf((char *)dbuf.mv_data+STRLENOF("mapaddr="), "%p", &info.me_mapaddr); - if (i != 1) { - fprintf(stderr, "%s: line %" Z "d: invalid mapaddr %s\n", - prog, lineno, (char *)dbuf.mv_data+STRLENOF("mapaddr=")); - exit(EXIT_FAILURE); - } - } else if (!strncmp(dbuf.mv_data, "mapsize=", STRLENOF("mapsize="))) { - int i; - ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size); - if (ptr) *ptr = '\0'; - i = sscanf((char *)dbuf.mv_data+STRLENOF("mapsize="), "%" Z "u", &info.me_mapsize); - if (i != 1) { - fprintf(stderr, "%s: line %" Z "d: invalid mapsize %s\n", - prog, lineno, (char *)dbuf.mv_data+STRLENOF("mapsize=")); - exit(EXIT_FAILURE); - } - } else if (!strncmp(dbuf.mv_data, "maxreaders=", STRLENOF("maxreaders="))) { - int i; - ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size); - if (ptr) *ptr = '\0'; - i = sscanf((char *)dbuf.mv_data+STRLENOF("maxreaders="), "%u", &info.me_maxreaders); - if (i != 1) { - fprintf(stderr, "%s: line %" Z "d: invalid maxreaders %s\n", - prog, lineno, (char *)dbuf.mv_data+STRLENOF("maxreaders=")); - exit(EXIT_FAILURE); - } - } else { - int i; - for (i=0; dbflags[i].bit; i++) { - if (!strncmp(dbuf.mv_data, dbflags[i].name, dbflags[i].len) && - ((char *)dbuf.mv_data)[dbflags[i].len] == '=') { - flags |= dbflags[i].bit; - break; - } - } - if (!dbflags[i].bit) { - ptr = memchr(dbuf.mv_data, '=', dbuf.mv_size); - if (!ptr) { - fprintf(stderr, "%s: line %" Z "d: unexpected format\n", - prog, lineno); - exit(EXIT_FAILURE); - } else { - *ptr = '\0'; - fprintf(stderr, "%s: line %" Z "d: unrecognized keyword ignored: %s\n", - prog, lineno, (char *)dbuf.mv_data); - } - } - } - } -} - -static void badend(void) -{ - fprintf(stderr, "%s: line %" Z "d: unexpected end of input\n", - prog, lineno); -} - -static int unhex(unsigned char *c2) -{ - int x, c; - x = *c2++ & 0x4f; - if (x & 0x40) - x -= 55; - c = x << 4; - x = *c2 & 0x4f; - if (x & 0x40) - x -= 55; - c |= x; - return c; -} - -static int readline(MDB_val *out, MDB_val *buf) -{ - unsigned char *c1, *c2, *end; - size_t len, l2; - int c; - - if (!(mode & NOHDR)) { - c = fgetc(stdin); - if (c == EOF) { - Eof = 1; - return EOF; - } - if (c != ' ') { - lineno++; - if (fgets(buf->mv_data, buf->mv_size, stdin) == NULL) { -badend: - Eof = 1; - badend(); - return EOF; - } - if (c == 'D' && !strncmp(buf->mv_data, "ATA=END", STRLENOF("ATA=END"))) - return EOF; - goto badend; - } - } - if (fgets(buf->mv_data, buf->mv_size, stdin) == NULL) { - Eof = 1; - return EOF; - } - lineno++; - - c1 = buf->mv_data; - len = strlen((char *)c1); - l2 = len; - - /* Is buffer too short? */ - while (c1[len-1] != '\n') { - buf->mv_data = realloc(buf->mv_data, buf->mv_size*2); - if (!buf->mv_data) { - Eof = 1; - fprintf(stderr, "%s: line %" Z "d: out of memory, line too long\n", - prog, lineno); - return EOF; - } - c1 = buf->mv_data; - c1 += l2; - if (fgets((char *)c1, buf->mv_size+1, stdin) == NULL) { - Eof = 1; - badend(); - return EOF; - } - buf->mv_size *= 2; - len = strlen((char *)c1); - l2 += len; - } - c1 = c2 = buf->mv_data; - len = l2; - c1[--len] = '\0'; - end = c1 + len; - - if (mode & PRINT) { - while (c2 < end) { - if (*c2 == '\\') { - if (c2[1] == '\\') { - c1++; c2 += 2; - } else { - if (c2+3 > end || !isxdigit(c2[1]) || !isxdigit(c2[2])) { - Eof = 1; - badend(); - return EOF; - } - *c1++ = unhex(++c2); - c2 += 2; - } - } else { - c1++; c2++; - } - } - } else { - /* odd length not allowed */ - if (len & 1) { - Eof = 1; - badend(); - return EOF; - } - while (c2 < end) { - if (!isxdigit(*c2) || !isxdigit(c2[1])) { - Eof = 1; - badend(); - return EOF; - } - *c1++ = unhex(c2); - c2 += 2; - } - } - c2 = out->mv_data = buf->mv_data; - out->mv_size = c1 - c2; - - return 0; -} - -static void usage(void) -{ - fprintf(stderr, "usage: %s dbpath [-V] [-f input] [-n] [-s name] [-N] [-T]\n", prog); - exit(EXIT_FAILURE); -} - -int main(int argc, char *argv[]) -{ - int i, rc; - MDB_env *env; - MDB_txn *txn; - MDB_cursor *mc; - MDB_dbi dbi; - char *envname; - int envflags = 0, putflags = 0; - int dohdr = 0; - - prog = argv[0]; - - if (argc < 2) { - usage(); - } - - /* -f: load file instead of stdin - * -n: use NOSUBDIR flag on env_open - * -s: load into named subDB - * -N: use NOOVERWRITE on puts - * -T: read plaintext - * -V: print version and exit - */ - while ((i = getopt(argc, argv, "f:ns:NTV")) != EOF) { - switch(i) { - case 'V': - printf("%s\n", MDB_VERSION_STRING); - exit(0); - break; - case 'f': - if (freopen(optarg, "r", stdin) == NULL) { - fprintf(stderr, "%s: %s: reopen: %s\n", - prog, optarg, strerror(errno)); - exit(EXIT_FAILURE); - } - break; - case 'n': - envflags |= MDB_NOSUBDIR; - break; - case 's': - subname = strdup(optarg); - break; - case 'N': - putflags = MDB_NOOVERWRITE|MDB_NODUPDATA; - break; - case 'T': - mode |= NOHDR; - break; - default: - usage(); - } - } - - if (optind != argc - 1) - usage(); - - dbuf.mv_size = 4096; - dbuf.mv_data = malloc(dbuf.mv_size); - - if (!(mode & NOHDR)) - readhdr(); - - envname = argv[optind]; - rc = mdb_env_create(&env); - if (rc) { - fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc)); - return EXIT_FAILURE; - } - - mdb_env_set_maxdbs(env, 2); - - if (info.me_maxreaders) - mdb_env_set_maxreaders(env, info.me_maxreaders); - - if (info.me_mapsize) - mdb_env_set_mapsize(env, info.me_mapsize); - - if (info.me_mapaddr) - envflags |= MDB_FIXEDMAP; - - rc = mdb_env_open(env, envname, envflags, 0664); - if (rc) { - fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto env_close; - } - - kbuf.mv_size = mdb_env_get_maxkeysize(env) * 2 + 2; - kbuf.mv_data = malloc(kbuf.mv_size); - - while(!Eof) { - MDB_val key, data; - int batch = 0; - flags = 0; - - if (!dohdr) { - dohdr = 1; - } else if (!(mode & NOHDR)) - readhdr(); - - rc = mdb_txn_begin(env, NULL, 0, &txn); - if (rc) { - fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc)); - goto env_close; - } - - rc = mdb_open(txn, subname, flags|MDB_CREATE, &dbi); - if (rc) { - fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - - rc = mdb_cursor_open(txn, dbi, &mc); - if (rc) { - fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - - while(1) { - rc = readline(&key, &kbuf); - if (rc == EOF) - break; - if (rc) - goto txn_abort; - - rc = readline(&data, &dbuf); - if (rc) - goto txn_abort; - - rc = mdb_cursor_put(mc, &key, &data, putflags); - if (rc == MDB_KEYEXIST && putflags) - continue; - if (rc) - goto txn_abort; - batch++; - if (batch == 100) { - rc = mdb_txn_commit(txn); - if (rc) { - fprintf(stderr, "%s: line %" Z "d: txn_commit: %s\n", - prog, lineno, mdb_strerror(rc)); - goto env_close; - } - rc = mdb_txn_begin(env, NULL, 0, &txn); - if (rc) { - fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc)); - goto env_close; - } - rc = mdb_cursor_open(txn, dbi, &mc); - if (rc) { - fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc)); - goto txn_abort; - } - batch = 0; - } - } - rc = mdb_txn_commit(txn); - txn = NULL; - if (rc) { - fprintf(stderr, "%s: line %" Z "d: txn_commit: %s\n", - prog, lineno, mdb_strerror(rc)); - goto env_close; - } - mdb_dbi_close(env, dbi); - } - -txn_abort: - mdb_txn_abort(txn); -env_close: - mdb_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/external/db_drivers/liblmdb64/mdb_stat.1 b/external/db_drivers/liblmdb64/mdb_stat.1 deleted file mode 100644 index e6ee5ad58..000000000 --- a/external/db_drivers/liblmdb64/mdb_stat.1 +++ /dev/null @@ -1,64 +0,0 @@ -.TH MDB_STAT 1 "2014/06/20" "LMDB 0.9.14" -.\" Copyright 2012-2015 Howard Chu, Symas Corp. All Rights Reserved. -.\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.SH NAME -mdb_stat \- LMDB environment status tool -.SH SYNOPSIS -.B mdb_stat -.BR \ envpath -[\c -.BR \-V ] -[\c -.BR \-e ] -[\c -.BR \-f [ f [ f ]]] -[\c -.BR \-n ] -[\c -.BR \-r [ r ]] -[\c -.BR \-a \ | -.BI \-s \ subdb\fR] -.SH DESCRIPTION -The -.B mdb_stat -utility displays the status of an LMDB environment. -.SH OPTIONS -.TP -.BR \-V -Write the library version number to the standard output, and exit. -.TP -.BR \-e -Display information about the database environment. -.TP -.BR \-f -Display information about the environment freelist. -If \fB\-ff\fP is given, summarize each freelist entry. -If \fB\-fff\fP is given, display the full list of page IDs in the freelist. -.TP -.BR \-n -Display the status of an LMDB database which does not use subdirectories. -.TP -.BR \-r -Display information about the environment reader table. -Shows the process ID, thread ID, and transaction ID for each active -reader slot. The process ID and transaction ID are in decimal, the -thread ID is in hexadecimal. The transaction ID is displayed as "-" -if the reader does not currently have a read transaction open. -If \fB\-rr\fP is given, check for stale entries in the reader -table and clear them. The reader table will be printed again -after the check is performed. -.TP -.BR \-a -Display the status of all of the subdatabases in the environment. -.TP -.BR \-s \ subdb -Display the status of a specific subdatabase. -.SH DIAGNOSTICS -Exit status is zero if no errors occur. -Errors result in a non-zero exit status and -a diagnostic message being written to standard error. -.SH "SEE ALSO" -.BR mdb_copy (1) -.SH AUTHOR -Howard Chu of Symas Corporation diff --git a/external/db_drivers/liblmdb64/midl.h b/external/db_drivers/liblmdb64/midl.h deleted file mode 100644 index 9b041d72d..000000000 --- a/external/db_drivers/liblmdb64/midl.h +++ /dev/null @@ -1,186 +0,0 @@ -/** @file midl.h - * @brief LMDB ID List header file. - * - * This file was originally part of back-bdb but has been - * modified for use in libmdb. Most of the macros defined - * in this file are unused, just left over from the original. - * - * This file is only used internally in libmdb and its definitions - * are not exposed publicly. - */ -/* $OpenLDAP$ */ -/* This work is part of OpenLDAP Software . - * - * Copyright 2000-2015 The OpenLDAP Foundation. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -#ifndef _MDB_MIDL_H_ -#define _MDB_MIDL_H_ - -#include - -#ifdef __cplusplus -extern "C" { -#endif - -/** @defgroup internal LMDB Internals - * @{ - */ - -/** @defgroup idls ID List Management - * @{ - */ - /** A generic unsigned ID number. These were entryIDs in back-bdb. - * Preferably it should have the same size as a pointer. - */ -typedef size_t MDB_ID; - - /** An IDL is an ID List, a sorted array of IDs. The first - * element of the array is a counter for how many actual - * IDs are in the list. In the original back-bdb code, IDLs are - * sorted in ascending order. For libmdb IDLs are sorted in - * descending order. - */ -typedef MDB_ID *MDB_IDL; - -/* IDL sizes - likely should be even bigger - * limiting factors: sizeof(ID), thread stack size - */ -#define MDB_IDL_LOGN 16 /* DB_SIZE is 2^16, UM_SIZE is 2^17 */ -#define MDB_IDL_DB_SIZE (1<. - */ - -/* Just like mtest.c, but using a subDB instead of the main DB */ - -#include -#include -#include -#include "lmdb.h" - -#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) -#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) -#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ - "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) - -int main(int argc,char * argv[]) -{ - int i = 0, j = 0, rc; - MDB_env *env; - MDB_dbi dbi; - MDB_val key, data; - MDB_txn *txn; - MDB_stat mst; - MDB_cursor *cursor; - int count; - int *values; - char sval[32] = ""; - - srand(time(NULL)); - - count = (rand()%384) + 64; - values = (int *)malloc(count*sizeof(int)); - - for(i = 0;i -1; i-= (rand()%5)) { - j++; - txn=NULL; - E(mdb_txn_begin(env, NULL, 0, &txn)); - sprintf(sval, "%03x ", values[i]); - if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) { - j--; - mdb_txn_abort(txn); - } else { - E(mdb_txn_commit(txn)); - } - } - free(values); - printf("Deleted %d values\n", j); - - E(mdb_env_stat(env, &mst)); - E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - printf("Cursor next\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - printf("Cursor prev\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - mdb_dbi_close(env, dbi); - mdb_env_close(env); - return 0; -} diff --git a/external/db_drivers/liblmdb64/mtest3.c b/external/db_drivers/liblmdb64/mtest3.c deleted file mode 100644 index 9db79e625..000000000 --- a/external/db_drivers/liblmdb64/mtest3.c +++ /dev/null @@ -1,133 +0,0 @@ -/* mtest3.c - memory-mapped database tester/toy */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -/* Tests for sorted duplicate DBs */ -#include -#include -#include -#include -#include "lmdb.h" - -#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) -#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) -#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ - "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) - -int main(int argc,char * argv[]) -{ - int i = 0, j = 0, rc; - MDB_env *env; - MDB_dbi dbi; - MDB_val key, data; - MDB_txn *txn; - MDB_stat mst; - MDB_cursor *cursor; - int count; - int *values; - char sval[32]; - char kval[sizeof(int)]; - - srand(time(NULL)); - - memset(sval, 0, sizeof(sval)); - - count = (rand()%384) + 64; - values = (int *)malloc(count*sizeof(int)); - - for(i = 0;i -1; i-= (rand()%5)) { - j++; - txn=NULL; - E(mdb_txn_begin(env, NULL, 0, &txn)); - sprintf(kval, "%03x", values[i & ~0x0f]); - sprintf(sval, "%03x %d foo bar", values[i], values[i]); - key.mv_size = sizeof(int); - key.mv_data = kval; - data.mv_size = sizeof(sval); - data.mv_data = sval; - if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) { - j--; - mdb_txn_abort(txn); - } else { - E(mdb_txn_commit(txn)); - } - } - free(values); - printf("Deleted %d values\n", j); - - E(mdb_env_stat(env, &mst)); - E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - printf("Cursor next\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - printf("Cursor prev\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - mdb_dbi_close(env, dbi); - mdb_env_close(env); - return 0; -} diff --git a/external/db_drivers/liblmdb64/mtest4.c b/external/db_drivers/liblmdb64/mtest4.c deleted file mode 100644 index 6df890e2d..000000000 --- a/external/db_drivers/liblmdb64/mtest4.c +++ /dev/null @@ -1,168 +0,0 @@ -/* mtest4.c - memory-mapped database tester/toy */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -/* Tests for sorted duplicate DBs with fixed-size keys */ -#include -#include -#include -#include -#include "lmdb.h" - -#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) -#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) -#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ - "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) - -int main(int argc,char * argv[]) -{ - int i = 0, j = 0, rc; - MDB_env *env; - MDB_dbi dbi; - MDB_val key, data; - MDB_txn *txn; - MDB_stat mst; - MDB_cursor *cursor; - int count; - int *values; - char sval[8]; - char kval[sizeof(int)]; - - memset(sval, 0, sizeof(sval)); - - count = 510; - values = (int *)malloc(count*sizeof(int)); - - for(i = 0;i -1; i-= (rand()%3)) { - j++; - txn=NULL; - E(mdb_txn_begin(env, NULL, 0, &txn)); - sprintf(sval, "%07x", values[i]); - key.mv_size = sizeof(int); - key.mv_data = kval; - data.mv_size = sizeof(sval); - data.mv_data = sval; - if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) { - j--; - mdb_txn_abort(txn); - } else { - E(mdb_txn_commit(txn)); - } - } - free(values); - printf("Deleted %d values\n", j); - - E(mdb_env_stat(env, &mst)); - E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - printf("Cursor next\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - printf("Cursor prev\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - mdb_dbi_close(env, dbi); - mdb_env_close(env); - return 0; -} diff --git a/external/db_drivers/liblmdb64/mtest5.c b/external/db_drivers/liblmdb64/mtest5.c deleted file mode 100644 index 14e3c0da4..000000000 --- a/external/db_drivers/liblmdb64/mtest5.c +++ /dev/null @@ -1,135 +0,0 @@ -/* mtest5.c - memory-mapped database tester/toy */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -/* Tests for sorted duplicate DBs using cursor_put */ -#include -#include -#include -#include -#include "lmdb.h" - -#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) -#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) -#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ - "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) - -int main(int argc,char * argv[]) -{ - int i = 0, j = 0, rc; - MDB_env *env; - MDB_dbi dbi; - MDB_val key, data; - MDB_txn *txn; - MDB_stat mst; - MDB_cursor *cursor; - int count; - int *values; - char sval[32]; - char kval[sizeof(int)]; - - srand(time(NULL)); - - memset(sval, 0, sizeof(sval)); - - count = (rand()%384) + 64; - values = (int *)malloc(count*sizeof(int)); - - for(i = 0;i -1; i-= (rand()%5)) { - j++; - txn=NULL; - E(mdb_txn_begin(env, NULL, 0, &txn)); - sprintf(kval, "%03x", values[i & ~0x0f]); - sprintf(sval, "%03x %d foo bar", values[i], values[i]); - key.mv_size = sizeof(int); - key.mv_data = kval; - data.mv_size = sizeof(sval); - data.mv_data = sval; - if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) { - j--; - mdb_txn_abort(txn); - } else { - E(mdb_txn_commit(txn)); - } - } - free(values); - printf("Deleted %d values\n", j); - - E(mdb_env_stat(env, &mst)); - E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - printf("Cursor next\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - printf("Cursor prev\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - mdb_dbi_close(env, dbi); - mdb_env_close(env); - return 0; -} diff --git a/external/db_drivers/liblmdb64/mtest6.c b/external/db_drivers/liblmdb64/mtest6.c deleted file mode 100644 index ae3c7f264..000000000 --- a/external/db_drivers/liblmdb64/mtest6.c +++ /dev/null @@ -1,141 +0,0 @@ -/* mtest6.c - memory-mapped database tester/toy */ -/* - * Copyright 2011-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -/* Tests for DB splits and merges */ -#include -#include -#include -#include -#include "lmdb.h" - -#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) -#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) -#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ - "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort())) - -char dkbuf[1024]; - -int main(int argc,char * argv[]) -{ - int i = 0, j = 0, rc; - MDB_env *env; - MDB_dbi dbi; - MDB_val key, data, sdata; - MDB_txn *txn; - MDB_stat mst; - MDB_cursor *cursor; - int count; - int *values; - long kval; - char *sval; - - srand(time(NULL)); - - E(mdb_env_create(&env)); - E(mdb_env_set_mapsize(env, 10485760)); - E(mdb_env_set_maxdbs(env, 4)); - E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664)); - - E(mdb_txn_begin(env, NULL, 0, &txn)); - E(mdb_dbi_open(txn, "id6", MDB_CREATE|MDB_INTEGERKEY, &dbi)); - E(mdb_cursor_open(txn, dbi, &cursor)); - E(mdb_stat(txn, dbi, &mst)); - - sval = calloc(1, mst.ms_psize / 4); - key.mv_size = sizeof(long); - key.mv_data = &kval; - sdata.mv_size = mst.ms_psize / 4 - 30; - sdata.mv_data = sval; - - printf("Adding 12 values, should yield 3 splits\n"); - for (i=0;i<12;i++) { - kval = i*5; - sprintf(sval, "%08x", kval); - data = sdata; - (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE)); - } - printf("Adding 12 more values, should yield 3 splits\n"); - for (i=0;i<12;i++) { - kval = i*5+4; - sprintf(sval, "%08x", kval); - data = sdata; - (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE)); - } - printf("Adding 12 more values, should yield 3 splits\n"); - for (i=0;i<12;i++) { - kval = i*5+1; - sprintf(sval, "%08x", kval); - data = sdata; - (void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE)); - } - E(mdb_cursor_get(cursor, &key, &data, MDB_FIRST)); - - do { - printf("key: %p %s, data: %p %.*s\n", - key.mv_data, mdb_dkey(&key, dkbuf), - data.mv_data, (int) data.mv_size, (char *) data.mv_data); - } while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0); - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - mdb_cursor_close(cursor); - mdb_txn_commit(txn); - -#if 0 - j=0; - - for (i= count - 1; i > -1; i-= (rand()%5)) { - j++; - txn=NULL; - E(mdb_txn_begin(env, NULL, 0, &txn)); - sprintf(kval, "%03x", values[i & ~0x0f]); - sprintf(sval, "%03x %d foo bar", values[i], values[i]); - key.mv_size = sizeof(int); - key.mv_data = kval; - data.mv_size = sizeof(sval); - data.mv_data = sval; - if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) { - j--; - mdb_txn_abort(txn); - } else { - E(mdb_txn_commit(txn)); - } - } - free(values); - printf("Deleted %d values\n", j); - - E(mdb_env_stat(env, &mst)); - E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn)); - E(mdb_cursor_open(txn, dbi, &cursor)); - printf("Cursor next\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - printf("Cursor prev\n"); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) { - printf("key: %.*s, data: %.*s\n", - (int) key.mv_size, (char *) key.mv_data, - (int) data.mv_size, (char *) data.mv_data); - } - CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get"); - mdb_cursor_close(cursor); - mdb_txn_abort(txn); - - mdb_dbi_close(env, dbi); -#endif - mdb_env_close(env); - - return 0; -} diff --git a/external/db_drivers/liblmdb64/sample-bdb.txt b/external/db_drivers/liblmdb64/sample-bdb.txt deleted file mode 100644 index 563807a2b..000000000 --- a/external/db_drivers/liblmdb64/sample-bdb.txt +++ /dev/null @@ -1,73 +0,0 @@ -/* sample-bdb.txt - BerkeleyDB toy/sample - * - * Do a line-by-line comparison of this and sample-mdb.txt - */ -/* - * Copyright 2012-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ -#include -#include -#include - -int main(int argc,char * argv[]) -{ - int rc; - DB_ENV *env; - DB *dbi; - DBT key, data; - DB_TXN *txn; - DBC *cursor; - char sval[32], kval[32]; - - /* Note: Most error checking omitted for simplicity */ - -#define FLAGS (DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_INIT_MPOOL|DB_CREATE|DB_THREAD) - rc = db_env_create(&env, 0); - rc = env->open(env, "./testdb", FLAGS, 0664); - rc = db_create(&dbi, env, 0); - rc = env->txn_begin(env, NULL, &txn, 0); - rc = dbi->open(dbi, txn, "test.bdb", NULL, DB_BTREE, DB_CREATE, 0664); - - memset(&key, 0, sizeof(DBT)); - memset(&data, 0, sizeof(DBT)); - key.size = sizeof(int); - key.data = sval; - data.size = sizeof(sval); - data.data = sval; - - sprintf(sval, "%03x %d foo bar", 32, 3141592); - rc = dbi->put(dbi, txn, &key, &data, 0); - rc = txn->commit(txn, 0); - if (rc) { - fprintf(stderr, "txn->commit: (%d) %s\n", rc, db_strerror(rc)); - goto leave; - } - rc = env->txn_begin(env, NULL, &txn, 0); - rc = dbi->cursor(dbi, txn, &cursor, 0); - key.flags = DB_DBT_USERMEM; - key.data = kval; - key.ulen = sizeof(kval); - data.flags = DB_DBT_USERMEM; - data.data = sval; - data.ulen = sizeof(sval); - while ((rc = cursor->c_get(cursor, &key, &data, DB_NEXT)) == 0) { - printf("key: %p %.*s, data: %p %.*s\n", - key.data, (int) key.size, (char *) key.data, - data.data, (int) data.size, (char *) data.data); - } - rc = cursor->c_close(cursor); - rc = txn->abort(txn); -leave: - rc = dbi->close(dbi, 0); - rc = env->close(env, 0); - return rc; -} diff --git a/external/db_drivers/liblmdb64/sample-mdb.txt b/external/db_drivers/liblmdb64/sample-mdb.txt deleted file mode 100644 index 10a256870..000000000 --- a/external/db_drivers/liblmdb64/sample-mdb.txt +++ /dev/null @@ -1,62 +0,0 @@ -/* sample-mdb.txt - MDB toy/sample - * - * Do a line-by-line comparison of this and sample-bdb.txt - */ -/* - * Copyright 2012-2015 Howard Chu, Symas Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ -#include -#include "lmdb.h" - -int main(int argc,char * argv[]) -{ - int rc; - MDB_env *env; - MDB_dbi dbi; - MDB_val key, data; - MDB_txn *txn; - MDB_cursor *cursor; - char sval[32]; - - /* Note: Most error checking omitted for simplicity */ - - rc = mdb_env_create(&env); - rc = mdb_env_open(env, "./testdb", 0, 0664); - rc = mdb_txn_begin(env, NULL, 0, &txn); - rc = mdb_dbi_open(txn, NULL, 0, &dbi); - - key.mv_size = sizeof(int); - key.mv_data = sval; - data.mv_size = sizeof(sval); - data.mv_data = sval; - - sprintf(sval, "%03x %d foo bar", 32, 3141592); - rc = mdb_put(txn, dbi, &key, &data, 0); - rc = mdb_txn_commit(txn); - if (rc) { - fprintf(stderr, "mdb_txn_commit: (%d) %s\n", rc, mdb_strerror(rc)); - goto leave; - } - rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn); - rc = mdb_cursor_open(txn, dbi, &cursor); - while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { - printf("key: %p %.*s, data: %p %.*s\n", - key.mv_data, (int) key.mv_size, (char *) key.mv_data, - data.mv_data, (int) data.mv_size, (char *) data.mv_data); - } - mdb_cursor_close(cursor); - mdb_txn_abort(txn); -leave: - mdb_dbi_close(env, dbi); - mdb_env_close(env); - return 0; -} diff --git a/external/db_drivers/liblmdb64/tooltag b/external/db_drivers/liblmdb64/tooltag deleted file mode 100644 index 229bf16ba..000000000 --- a/external/db_drivers/liblmdb64/tooltag +++ /dev/null @@ -1,22 +0,0 @@ - - - mdb_copy_1 - mdb_copy - environment copy tool - mdb_copy.1 - - - mdb_dump_1 - mdb_dump - environment export tool - mdb_dump.1 - - - mdb_load_1 - mdb_load - environment import tool - mdb_load.1 - - - mdb_stat_1 - mdb_stat - environment status tool - mdb_stat.1 - -