mirror of
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124 lines
4 KiB
C++
124 lines
4 KiB
C++
//
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// detail/win_iocp_socket_recvmsg_op.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2019 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 BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_RECVMSG_OP_HPP
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#define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_RECVMSG_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 <boost/asio/detail/config.hpp>
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#if defined(BOOST_ASIO_HAS_IOCP)
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#include <boost/asio/detail/bind_handler.hpp>
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#include <boost/asio/detail/buffer_sequence_adapter.hpp>
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#include <boost/asio/detail/fenced_block.hpp>
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#include <boost/asio/detail/handler_alloc_helpers.hpp>
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#include <boost/asio/detail/handler_invoke_helpers.hpp>
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#include <boost/asio/detail/memory.hpp>
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#include <boost/asio/detail/operation.hpp>
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#include <boost/asio/detail/socket_ops.hpp>
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#include <boost/asio/error.hpp>
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#include <boost/asio/socket_base.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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namespace detail {
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template <typename MutableBufferSequence, typename Handler, typename IoExecutor>
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class win_iocp_socket_recvmsg_op : public operation
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{
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public:
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BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_recvmsg_op);
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win_iocp_socket_recvmsg_op(
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socket_ops::weak_cancel_token_type cancel_token,
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const MutableBufferSequence& buffers,
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socket_base::message_flags& out_flags,
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Handler& handler, const IoExecutor& io_ex)
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: operation(&win_iocp_socket_recvmsg_op::do_complete),
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cancel_token_(cancel_token),
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buffers_(buffers),
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out_flags_(out_flags),
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handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)),
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io_executor_(io_ex)
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{
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handler_work<Handler, IoExecutor>::start(handler_, io_executor_);
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}
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static void do_complete(void* owner, operation* base,
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const boost::system::error_code& result_ec,
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std::size_t bytes_transferred)
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{
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boost::system::error_code ec(result_ec);
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// Take ownership of the operation object.
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win_iocp_socket_recvmsg_op* o(
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static_cast<win_iocp_socket_recvmsg_op*>(base));
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ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
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handler_work<Handler, IoExecutor> w(o->handler_, o->io_executor_);
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BOOST_ASIO_HANDLER_COMPLETION((*o));
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#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
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// Check whether buffers are still valid.
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if (owner)
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{
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buffer_sequence_adapter<boost::asio::mutable_buffer,
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MutableBufferSequence>::validate(o->buffers_);
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}
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#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
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socket_ops::complete_iocp_recvmsg(o->cancel_token_, ec);
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o->out_flags_ = 0;
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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, boost::system::error_code, std::size_t>
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handler(o->handler_, ec, bytes_transferred);
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p.h = boost::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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BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
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w.complete(handler, handler.handler_);
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BOOST_ASIO_HANDLER_INVOCATION_END;
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}
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}
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private:
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socket_ops::weak_cancel_token_type cancel_token_;
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MutableBufferSequence buffers_;
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socket_base::message_flags& out_flags_;
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Handler handler_;
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IoExecutor io_executor_;
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};
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} // namespace detail
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#endif // defined(BOOST_ASIO_HAS_IOCP)
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#endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_RECVMSG_OP_HPP
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