asio/detail/win_iocp_socket_connect_op.hpp

0001 //
0002 // detail/win_iocp_socket_connect_op.hpp
0003 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0004 //
0005 // Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009 //
0010
0011 #ifndef BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP
0012 #define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP
0013
0014 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
0015 # pragma once
0016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
0017
0018 #include <boost/asio/detail/config.hpp>
0019
0020 #if defined(BOOST_ASIO_HAS_IOCP)
0021
0022 #include <boost/asio/detail/bind_handler.hpp>
0023 #include <boost/asio/detail/fenced_block.hpp>
0024 #include <boost/asio/detail/handler_alloc_helpers.hpp>
0025 #include <boost/asio/detail/handler_work.hpp>
0026 #include <boost/asio/detail/memory.hpp>
0027 #include <boost/asio/detail/reactor_op.hpp>
0028 #include <boost/asio/detail/socket_ops.hpp>
0029 #include <boost/asio/error.hpp>
0030
0031 #include <boost/asio/detail/push_options.hpp>
0032
0033 namespace boost {
0034 namespace asio {
0035 namespace detail {
0036
0037 class win_iocp_socket_connect_op_base : public reactor_op
0038 {
0039 public:
0040   win_iocp_socket_connect_op_base(socket_type socket, func_type complete_func)
0041     : reactor_op(boost::system::error_code(),
0042         &win_iocp_socket_connect_op_base::do_perform, complete_func),
0043       socket_(socket),
0044       connect_ex_(false)
0045   {
0046   }
0047
0048   static status do_perform(reactor_op* base)
0049   {
0050     BOOST_ASIO_ASSUME(base != 0);
0051     win_iocp_socket_connect_op_base* o(
0052         static_cast<win_iocp_socket_connect_op_base*>(base));
0053
0054     return socket_ops::non_blocking_connect(
0055         o->socket_, o->ec_) ? done : not_done;
0056   }
0057
0058   socket_type socket_;
0059   bool connect_ex_;
0060 };
0061
0062 template <typename Handler, typename IoExecutor>
0063 class win_iocp_socket_connect_op : public win_iocp_socket_connect_op_base
0064 {
0065 public:
0066   BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_connect_op);
0067
0068   win_iocp_socket_connect_op(socket_type socket,
0069       Handler& handler, const IoExecutor& io_ex)
0070     : win_iocp_socket_connect_op_base(socket,
0071         &win_iocp_socket_connect_op::do_complete),
0072       handler_(static_cast<Handler&&>(handler)),
0073       work_(handler_, io_ex)
0074   {
0075   }
0076
0077   static void do_complete(void* owner, operation* base,
0078       const boost::system::error_code& result_ec,
0079       std::size_t /*bytes_transferred*/)
0080   {
0081     boost::system::error_code ec(result_ec);
0082
0083     // Take ownership of the operation object.
0084     BOOST_ASIO_ASSUME(base != 0);
0085     win_iocp_socket_connect_op* o(
0086         static_cast<win_iocp_socket_connect_op*>(base));
0087     ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
0088
0089     if (owner)
0090     {
0091       if (o->connect_ex_)
0092         socket_ops::complete_iocp_connect(o->socket_, ec);
0093       else
0094         ec = o->ec_;
0095     }
0096
0097     BOOST_ASIO_HANDLER_COMPLETION((*o));
0098
0099     // Take ownership of the operation's outstanding work.
0100     handler_work<Handler, IoExecutor> w(
0101         static_cast<handler_work<Handler, IoExecutor>&&>(
0102           o->work_));
0103
0104     BOOST_ASIO_ERROR_LOCATION(ec);
0105
0106     // Make a copy of the handler so that the memory can be deallocated before
0107     // the upcall is made. Even if we're not about to make an upcall, a
0108     // sub-object of the handler may be the true owner of the memory associated
0109     // with the handler. Consequently, a local copy of the handler is required
0110     // to ensure that any owning sub-object remains valid until after we have
0111     // deallocated the memory here.
0112     detail::binder1<Handler, boost::system::error_code>
0113       handler(o->handler_, ec);
0114     p.h = boost::asio::detail::addressof(handler.handler_);
0115     p.reset();
0116
0117     // Make the upcall if required.
0118     if (owner)
0119     {
0120       fenced_block b(fenced_block::half);
0121       BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
0122       w.complete(handler, handler.handler_);
0123       BOOST_ASIO_HANDLER_INVOCATION_END;
0124     }
0125   }
0126
0127 private:
0128   Handler handler_;
0129   handler_work<Handler, IoExecutor> work_;
0130 };
0131
0132 } // namespace detail
0133 } // namespace asio
0134 } // namespace boost
0135
0136 #include <boost/asio/detail/pop_options.hpp>
0137
0138 #endif // defined(BOOST_ASIO_HAS_IOCP)
0139
0140 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP