1 // 2 // detail/win_iocp_socket_connect_op.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2019 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/memory.hpp> 27 #include <boost/asio/detail/reactor_op.hpp> 28 #include <boost/asio/detail/socket_ops.hpp> 29 #include <boost/asio/error.hpp> 30 31 #include <boost/asio/detail/push_options.hpp> 32 33 namespace boost { 34 namespace asio { 35 namespace detail { 36 37 class win_iocp_socket_connect_op_base : public reactor_op 38 { 39 public: win_iocp_socket_connect_op_base(socket_type socket,func_type complete_func)40 win_iocp_socket_connect_op_base(socket_type socket, func_type complete_func) 41 : reactor_op(&win_iocp_socket_connect_op_base::do_perform, complete_func), 42 socket_(socket), 43 connect_ex_(false) 44 { 45 } 46 do_perform(reactor_op * base)47 static status do_perform(reactor_op* base) 48 { 49 win_iocp_socket_connect_op_base* o( 50 static_cast<win_iocp_socket_connect_op_base*>(base)); 51 52 return socket_ops::non_blocking_connect( 53 o->socket_, o->ec_) ? done : not_done; 54 } 55 56 socket_type socket_; 57 bool connect_ex_; 58 }; 59 60 template <typename Handler, typename IoExecutor> 61 class win_iocp_socket_connect_op : public win_iocp_socket_connect_op_base 62 { 63 public: 64 BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_connect_op); 65 win_iocp_socket_connect_op(socket_type socket,Handler & handler,const IoExecutor & io_ex)66 win_iocp_socket_connect_op(socket_type socket, 67 Handler& handler, const IoExecutor& io_ex) 68 : win_iocp_socket_connect_op_base(socket, 69 &win_iocp_socket_connect_op::do_complete), 70 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)), 71 io_executor_(io_ex) 72 { 73 handler_work<Handler, IoExecutor>::start(handler_, io_executor_); 74 } 75 do_complete(void * owner,operation * base,const boost::system::error_code & result_ec,std::size_t)76 static void do_complete(void* owner, operation* base, 77 const boost::system::error_code& result_ec, 78 std::size_t /*bytes_transferred*/) 79 { 80 boost::system::error_code ec(result_ec); 81 82 // Take ownership of the operation object. 83 win_iocp_socket_connect_op* o( 84 static_cast<win_iocp_socket_connect_op*>(base)); 85 ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; 86 handler_work<Handler, IoExecutor> w(o->handler_, o->io_executor_); 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 // Make a copy of the handler so that the memory can be deallocated before 99 // the upcall is made. Even if we're not about to make an upcall, a 100 // sub-object of the handler may be the true owner of the memory associated 101 // with the handler. Consequently, a local copy of the handler is required 102 // to ensure that any owning sub-object remains valid until after we have 103 // deallocated the memory here. 104 detail::binder1<Handler, boost::system::error_code> 105 handler(o->handler_, ec); 106 p.h = boost::asio::detail::addressof(handler.handler_); 107 p.reset(); 108 109 // Make the upcall if required. 110 if (owner) 111 { 112 fenced_block b(fenced_block::half); 113 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_)); 114 w.complete(handler, handler.handler_); 115 BOOST_ASIO_HANDLER_INVOCATION_END; 116 } 117 } 118 119 private: 120 Handler handler_; 121 IoExecutor io_executor_; 122 }; 123 124 } // namespace detail 125 } // namespace asio 126 } // namespace boost 127 128 #include <boost/asio/detail/pop_options.hpp> 129 130 #endif // defined(BOOST_ASIO_HAS_IOCP) 131 132 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_CONNECT_OP_HPP 133