1 // 2 // detail/win_iocp_socket_send_op.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 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_SEND_OP_HPP 12 #define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SEND_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/addressof.hpp> 23 #include <boost/asio/detail/bind_handler.hpp> 24 #include <boost/asio/detail/buffer_sequence_adapter.hpp> 25 #include <boost/asio/detail/fenced_block.hpp> 26 #include <boost/asio/detail/handler_alloc_helpers.hpp> 27 #include <boost/asio/detail/handler_invoke_helpers.hpp> 28 #include <boost/asio/detail/operation.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 template <typename ConstBufferSequence, typename Handler> 39 class win_iocp_socket_send_op : public operation 40 { 41 public: 42 BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_send_op); 43 win_iocp_socket_send_op(socket_ops::weak_cancel_token_type cancel_token,const ConstBufferSequence & buffers,Handler & handler)44 win_iocp_socket_send_op(socket_ops::weak_cancel_token_type cancel_token, 45 const ConstBufferSequence& buffers, Handler& handler) 46 : operation(&win_iocp_socket_send_op::do_complete), 47 cancel_token_(cancel_token), 48 buffers_(buffers), 49 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) 50 { 51 } 52 do_complete(io_service_impl * owner,operation * base,const boost::system::error_code & result_ec,std::size_t bytes_transferred)53 static void do_complete(io_service_impl* owner, operation* base, 54 const boost::system::error_code& result_ec, 55 std::size_t bytes_transferred) 56 { 57 boost::system::error_code ec(result_ec); 58 59 // Take ownership of the operation object. 60 win_iocp_socket_send_op* o(static_cast<win_iocp_socket_send_op*>(base)); 61 ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; 62 63 BOOST_ASIO_HANDLER_COMPLETION((o)); 64 65 #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) 66 // Check whether buffers are still valid. 67 if (owner) 68 { 69 buffer_sequence_adapter<boost::asio::const_buffer, 70 ConstBufferSequence>::validate(o->buffers_); 71 } 72 #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) 73 74 socket_ops::complete_iocp_send(o->cancel_token_, ec); 75 76 // Make a copy of the handler so that the memory can be deallocated before 77 // the upcall is made. Even if we're not about to make an upcall, a 78 // sub-object of the handler may be the true owner of the memory associated 79 // with the handler. Consequently, a local copy of the handler is required 80 // to ensure that any owning sub-object remains valid until after we have 81 // deallocated the memory here. 82 detail::binder2<Handler, boost::system::error_code, std::size_t> 83 handler(o->handler_, ec, bytes_transferred); 84 p.h = boost::asio::detail::addressof(handler.handler_); 85 p.reset(); 86 87 // Make the upcall if required. 88 if (owner) 89 { 90 fenced_block b(fenced_block::half); 91 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); 92 boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); 93 BOOST_ASIO_HANDLER_INVOCATION_END; 94 } 95 } 96 97 private: 98 socket_ops::weak_cancel_token_type cancel_token_; 99 ConstBufferSequence buffers_; 100 Handler handler_; 101 }; 102 103 } // namespace detail 104 } // namespace asio 105 } // namespace boost 106 107 #include <boost/asio/detail/pop_options.hpp> 108 109 #endif // defined(BOOST_ASIO_HAS_IOCP) 110 111 #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SEND_OP_HPP 112