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