mirror of
https://github.com/yuzu-emu/ext-boost.git
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309 lines
9.9 KiB
C++
309 lines
9.9 KiB
C++
//
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// detail/win_iocp_socket_accept_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_ACCEPT_OP_HPP
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#define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_ACCEPT_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/detail/win_iocp_socket_service_base.hpp>
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#include <boost/asio/error.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 Socket, typename Protocol,
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typename Handler, typename IoExecutor>
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class win_iocp_socket_accept_op : public operation
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{
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public:
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BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_accept_op);
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win_iocp_socket_accept_op(win_iocp_socket_service_base& socket_service,
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socket_type socket, Socket& peer, const Protocol& protocol,
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typename Protocol::endpoint* peer_endpoint,
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bool enable_connection_aborted, Handler& handler, const IoExecutor& io_ex)
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: operation(&win_iocp_socket_accept_op::do_complete),
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socket_service_(socket_service),
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socket_(socket),
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peer_(peer),
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protocol_(protocol),
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peer_endpoint_(peer_endpoint),
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enable_connection_aborted_(enable_connection_aborted),
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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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socket_holder& new_socket()
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{
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return new_socket_;
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}
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void* output_buffer()
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{
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return output_buffer_;
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}
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DWORD address_length()
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{
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return sizeof(sockaddr_storage_type) + 16;
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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_accept_op* o(static_cast<win_iocp_socket_accept_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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if (owner)
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{
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typename Protocol::endpoint peer_endpoint;
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std::size_t addr_len = peer_endpoint.capacity();
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socket_ops::complete_iocp_accept(o->socket_,
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o->output_buffer(), o->address_length(),
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peer_endpoint.data(), &addr_len,
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o->new_socket_.get(), ec);
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// Restart the accept operation if we got the connection_aborted error
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// and the enable_connection_aborted socket option is not set.
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if (ec == boost::asio::error::connection_aborted
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&& !o->enable_connection_aborted_)
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{
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o->reset();
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o->socket_service_.restart_accept_op(o->socket_,
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o->new_socket_, o->protocol_.family(),
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o->protocol_.type(), o->protocol_.protocol(),
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o->output_buffer(), o->address_length(), o);
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p.v = p.p = 0;
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return;
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}
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// If the socket was successfully accepted, transfer ownership of the
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// socket to the peer object.
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if (!ec)
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{
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o->peer_.assign(o->protocol_,
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typename Socket::native_handle_type(
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o->new_socket_.get(), peer_endpoint), ec);
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if (!ec)
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o->new_socket_.release();
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}
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// Pass endpoint back to caller.
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if (o->peer_endpoint_)
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*o->peer_endpoint_ = peer_endpoint;
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}
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BOOST_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::binder1<Handler, boost::system::error_code>
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handler(o->handler_, ec);
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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_));
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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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win_iocp_socket_service_base& socket_service_;
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socket_type socket_;
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socket_holder new_socket_;
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Socket& peer_;
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Protocol protocol_;
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typename Protocol::endpoint* peer_endpoint_;
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unsigned char output_buffer_[(sizeof(sockaddr_storage_type) + 16) * 2];
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bool enable_connection_aborted_;
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Handler handler_;
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IoExecutor io_executor_;
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};
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#if defined(BOOST_ASIO_HAS_MOVE)
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template <typename Protocol, typename PeerIoExecutor,
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typename Handler, typename IoExecutor>
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class win_iocp_socket_move_accept_op : public operation
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{
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public:
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BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_move_accept_op);
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win_iocp_socket_move_accept_op(
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win_iocp_socket_service_base& socket_service, socket_type socket,
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const Protocol& protocol, const PeerIoExecutor& peer_io_ex,
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typename Protocol::endpoint* peer_endpoint,
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bool enable_connection_aborted, Handler& handler, const IoExecutor& io_ex)
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: operation(&win_iocp_socket_move_accept_op::do_complete),
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socket_service_(socket_service),
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socket_(socket),
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peer_(peer_io_ex),
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protocol_(protocol),
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peer_endpoint_(peer_endpoint),
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enable_connection_aborted_(enable_connection_aborted),
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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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socket_holder& new_socket()
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{
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return new_socket_;
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}
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void* output_buffer()
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{
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return output_buffer_;
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}
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DWORD address_length()
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{
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return sizeof(sockaddr_storage_type) + 16;
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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_move_accept_op* o(
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static_cast<win_iocp_socket_move_accept_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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if (owner)
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{
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typename Protocol::endpoint peer_endpoint;
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std::size_t addr_len = peer_endpoint.capacity();
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socket_ops::complete_iocp_accept(o->socket_,
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o->output_buffer(), o->address_length(),
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peer_endpoint.data(), &addr_len,
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o->new_socket_.get(), ec);
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// Restart the accept operation if we got the connection_aborted error
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// and the enable_connection_aborted socket option is not set.
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if (ec == boost::asio::error::connection_aborted
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&& !o->enable_connection_aborted_)
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{
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o->reset();
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o->socket_service_.restart_accept_op(o->socket_,
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o->new_socket_, o->protocol_.family(),
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o->protocol_.type(), o->protocol_.protocol(),
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o->output_buffer(), o->address_length(), o);
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p.v = p.p = 0;
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return;
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}
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// If the socket was successfully accepted, transfer ownership of the
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// socket to the peer object.
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if (!ec)
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{
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o->peer_.assign(o->protocol_,
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typename Protocol::socket::native_handle_type(
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o->new_socket_.get(), peer_endpoint), ec);
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if (!ec)
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o->new_socket_.release();
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}
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// Pass endpoint back to caller.
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if (o->peer_endpoint_)
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*o->peer_endpoint_ = peer_endpoint;
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}
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BOOST_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::move_binder2<Handler,
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boost::system::error_code, peer_socket_type>
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handler(0, BOOST_ASIO_MOVE_CAST(Handler)(o->handler_), ec,
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BOOST_ASIO_MOVE_CAST(peer_socket_type)(o->peer_));
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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_, "..."));
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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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typedef typename Protocol::socket::template
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rebind_executor<PeerIoExecutor>::other peer_socket_type;
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win_iocp_socket_service_base& socket_service_;
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socket_type socket_;
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socket_holder new_socket_;
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peer_socket_type peer_;
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Protocol protocol_;
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typename Protocol::endpoint* peer_endpoint_;
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unsigned char output_buffer_[(sizeof(sockaddr_storage_type) + 16) * 2];
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bool enable_connection_aborted_;
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Handler handler_;
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IoExecutor io_executor_;
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};
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#endif // defined(BOOST_ASIO_HAS_MOVE)
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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_ACCEPT_OP_HPP
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