// // detail/reactive_socket_recvmsg_op.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #ifndef ASIO_DETAIL_REACTIVE_SOCKET_RECVMSG_OP_HPP #define ASIO_DETAIL_REACTIVE_SOCKET_RECVMSG_OP_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include "asio/detail/config.hpp" #include "asio/detail/bind_handler.hpp" #include "asio/detail/buffer_sequence_adapter.hpp" #include "asio/detail/fenced_block.hpp" #include "asio/detail/memory.hpp" #include "asio/detail/reactor_op.hpp" #include "asio/detail/socket_ops.hpp" #include "asio/socket_base.hpp" #include "asio/detail/push_options.hpp" namespace asio { namespace detail { template class reactive_socket_recvmsg_op_base : public reactor_op { public: reactive_socket_recvmsg_op_base(socket_type socket, const MutableBufferSequence& buffers, socket_base::message_flags in_flags, socket_base::message_flags& out_flags, func_type complete_func) : reactor_op(&reactive_socket_recvmsg_op_base::do_perform, complete_func), socket_(socket), buffers_(buffers), in_flags_(in_flags), out_flags_(out_flags) { } static bool do_perform(reactor_op* base) { reactive_socket_recvmsg_op_base* o( static_cast(base)); buffer_sequence_adapter bufs(o->buffers_); bool result = socket_ops::non_blocking_recvmsg(o->socket_, bufs.buffers(), bufs.count(), o->in_flags_, o->out_flags_, o->ec_, o->bytes_transferred_); ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_recvmsg", o->ec_, o->bytes_transferred_)); return result; } private: socket_type socket_; MutableBufferSequence buffers_; socket_base::message_flags in_flags_; socket_base::message_flags& out_flags_; }; template class reactive_socket_recvmsg_op : public reactive_socket_recvmsg_op_base { public: ASIO_DEFINE_HANDLER_PTR(reactive_socket_recvmsg_op); reactive_socket_recvmsg_op(socket_type socket, const MutableBufferSequence& buffers, socket_base::message_flags in_flags, socket_base::message_flags& out_flags, Handler& handler) : reactive_socket_recvmsg_op_base(socket, buffers, in_flags, out_flags, &reactive_socket_recvmsg_op::do_complete), handler_(ASIO_MOVE_CAST(Handler)(handler)) { handler_work::start(handler_); } static void do_complete(void* owner, operation* base, const asio::error_code& /*ec*/, std::size_t /*bytes_transferred*/) { // Take ownership of the handler object. reactive_socket_recvmsg_op* o( static_cast(base)); ptr p = { asio::detail::addressof(o->handler_), o, o }; handler_work w(o->handler_); ASIO_HANDLER_COMPLETION((*o)); // Make a copy of the handler so that the memory can be deallocated before // the upcall is made. Even if we're not about to make an upcall, a // sub-object of the handler may be the true owner of the memory associated // with the handler. Consequently, a local copy of the handler is required // to ensure that any owning sub-object remains valid until after we have // deallocated the memory here. detail::binder2 handler(o->handler_, o->ec_, o->bytes_transferred_); p.h = asio::detail::addressof(handler.handler_); p.reset(); // Make the upcall if required. if (owner) { fenced_block b(fenced_block::half); ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); w.complete(handler, handler.handler_); ASIO_HANDLER_INVOCATION_END; } } private: Handler handler_; }; } // namespace detail } // namespace asio #include "asio/detail/pop_options.hpp" #endif // ASIO_DETAIL_REACTIVE_SOCKET_RECVMSG_OP_HPP