1 // 2 // detail/win_iocp_socket_connect_op.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See accompanying 8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 9 // 10 11 #ifndef BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP 12 #define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP 13 14 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 15 # pragma once 16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 17 18 #include <boost/asio/detail/config.hpp> 19 20 #if defined(BOOST_ASIO_HAS_IOCP) 21 22 #include <boost/asio/detail/bind_handler.hpp> 23 #include <boost/asio/detail/fenced_block.hpp> 24 #include <boost/asio/detail/handler_alloc_helpers.hpp> 25 #include <boost/asio/detail/handler_invoke_helpers.hpp> 26 #include <boost/asio/detail/handler_work.hpp> 27 #include <boost/asio/detail/memory.hpp> 28 #include <boost/asio/detail/reactor_op.hpp> 29 #include <boost/asio/detail/socket_ops.hpp> 30 #include <boost/asio/error.hpp> 31 32 #include <boost/asio/detail/push_options.hpp> 33 34 namespace boost { 35 namespace asio { 36 namespace detail { 37 38 class win_iocp_socket_connect_op_base : public reactor_op 39 { 40 public: win_iocp_socket_connect_op_base(socket_type socket,func_type complete_func)41 win_iocp_socket_connect_op_base(socket_type socket, func_type complete_func) 42 : reactor_op(boost::system::error_code(), 43 &win_iocp_socket_connect_op_base::do_perform, complete_func), 44 socket_(socket), 45 connect_ex_(false) 46 { 47 } 48 do_perform(reactor_op * base)49 static status do_perform(reactor_op* base) 50 { 51 win_iocp_socket_connect_op_base* o( 52 static_cast<win_iocp_socket_connect_op_base*>(base)); 53 54 return socket_ops::non_blocking_connect( 55 o->socket_, o->ec_) ? done : not_done; 56 } 57 58 socket_type socket_; 59 bool connect_ex_; 60 }; 61 62 template <typename Handler, typename IoExecutor> 63 class win_iocp_socket_connect_op : public win_iocp_socket_connect_op_base 64 { 65 public: 66 BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_connect_op); 67 win_iocp_socket_connect_op(socket_type socket,Handler & handler,const IoExecutor & io_ex)68 win_iocp_socket_connect_op(socket_type socket, 69 Handler& handler, const IoExecutor& io_ex) 70 : win_iocp_socket_connect_op_base(socket, 71 &win_iocp_socket_connect_op::do_complete), 72 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)), 73 work_(handler_, io_ex) 74 { 75 } 76 do_complete(void * owner,operation * base,const boost::system::error_code & result_ec,std::size_t)77 static void do_complete(void* owner, operation* base, 78 const boost::system::error_code& result_ec, 79 std::size_t /*bytes_transferred*/) 80 { 81 boost::system::error_code ec(result_ec); 82 83 // Take ownership of the operation object. 84 win_iocp_socket_connect_op* o( 85 static_cast<win_iocp_socket_connect_op*>(base)); 86 ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; 87 88 if (owner) 89 { 90 if (o->connect_ex_) 91 socket_ops::complete_iocp_connect(o->socket_, ec); 92 else 93 ec = o->ec_; 94 } 95 96 BOOST_ASIO_HANDLER_COMPLETION((*o)); 97 98 // Take ownership of the operation's outstanding work. 99 handler_work<Handler, IoExecutor> w( 100 BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)( 101 o->work_)); 102 103 // Make a copy of the handler so that the memory can be deallocated before 104 // the upcall is made. Even if we're not about to make an upcall, a 105 // sub-object of the handler may be the true owner of the memory associated 106 // with the handler. Consequently, a local copy of the handler is required 107 // to ensure that any owning sub-object remains valid until after we have 108 // deallocated the memory here. 109 detail::binder1<Handler, boost::system::error_code> 110 handler(o->handler_, ec); 111 p.h = boost::asio::detail::addressof(handler.handler_); 112 p.reset(); 113 114 // Make the upcall if required. 115 if (owner) 116 { 117 fenced_block b(fenced_block::half); 118 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_)); 119 w.complete(handler, handler.handler_); 120 BOOST_ASIO_HANDLER_INVOCATION_END; 121 } 122 } 123 124 private: 125 Handler handler_; 126 handler_work<Handler, IoExecutor> work_; 127 }; 128 129 } // namespace detail 130 } // namespace asio 131 } // namespace boost 132 133 #include <boost/asio/detail/pop_options.hpp> 134 135 #endif // defined(BOOST_ASIO_HAS_IOCP) 136 137 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP 138