1 // 2 // detail/reactive_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_REACTIVE_SOCKET_SEND_OP_HPP 12 #define BOOST_ASIO_DETAIL_REACTIVE_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 #include <boost/asio/detail/addressof.hpp> 20 #include <boost/asio/detail/bind_handler.hpp> 21 #include <boost/asio/detail/buffer_sequence_adapter.hpp> 22 #include <boost/asio/detail/fenced_block.hpp> 23 #include <boost/asio/detail/reactor_op.hpp> 24 #include <boost/asio/detail/socket_ops.hpp> 25 26 #include <boost/asio/detail/push_options.hpp> 27 28 namespace boost { 29 namespace asio { 30 namespace detail { 31 32 template <typename ConstBufferSequence> 33 class reactive_socket_send_op_base : public reactor_op 34 { 35 public: reactive_socket_send_op_base(socket_type socket,const ConstBufferSequence & buffers,socket_base::message_flags flags,func_type complete_func)36 reactive_socket_send_op_base(socket_type socket, 37 const ConstBufferSequence& buffers, 38 socket_base::message_flags flags, func_type complete_func) 39 : reactor_op(&reactive_socket_send_op_base::do_perform, complete_func), 40 socket_(socket), 41 buffers_(buffers), 42 flags_(flags) 43 { 44 } 45 do_perform(reactor_op * base)46 static bool do_perform(reactor_op* base) 47 { 48 reactive_socket_send_op_base* o( 49 static_cast<reactive_socket_send_op_base*>(base)); 50 51 buffer_sequence_adapter<boost::asio::const_buffer, 52 ConstBufferSequence> bufs(o->buffers_); 53 54 return socket_ops::non_blocking_send(o->socket_, 55 bufs.buffers(), bufs.count(), o->flags_, 56 o->ec_, o->bytes_transferred_); 57 } 58 59 private: 60 socket_type socket_; 61 ConstBufferSequence buffers_; 62 socket_base::message_flags flags_; 63 }; 64 65 template <typename ConstBufferSequence, typename Handler> 66 class reactive_socket_send_op : 67 public reactive_socket_send_op_base<ConstBufferSequence> 68 { 69 public: 70 BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_send_op); 71 reactive_socket_send_op(socket_type socket,const ConstBufferSequence & buffers,socket_base::message_flags flags,Handler & handler)72 reactive_socket_send_op(socket_type socket, 73 const ConstBufferSequence& buffers, 74 socket_base::message_flags flags, Handler& handler) 75 : reactive_socket_send_op_base<ConstBufferSequence>(socket, 76 buffers, flags, &reactive_socket_send_op::do_complete), 77 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) 78 { 79 } 80 do_complete(io_service_impl * owner,operation * base,const boost::system::error_code &,std::size_t)81 static void do_complete(io_service_impl* owner, operation* base, 82 const boost::system::error_code& /*ec*/, 83 std::size_t /*bytes_transferred*/) 84 { 85 // Take ownership of the handler object. 86 reactive_socket_send_op* o(static_cast<reactive_socket_send_op*>(base)); 87 ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; 88 89 BOOST_ASIO_HANDLER_COMPLETION((o)); 90 91 // Make a copy of the handler so that the memory can be deallocated before 92 // the upcall is made. Even if we're not about to make an upcall, a 93 // sub-object of the handler may be the true owner of the memory associated 94 // with the handler. Consequently, a local copy of the handler is required 95 // to ensure that any owning sub-object remains valid until after we have 96 // deallocated the memory here. 97 detail::binder2<Handler, boost::system::error_code, std::size_t> 98 handler(o->handler_, o->ec_, o->bytes_transferred_); 99 p.h = boost::asio::detail::addressof(handler.handler_); 100 p.reset(); 101 102 // Make the upcall if required. 103 if (owner) 104 { 105 fenced_block b(fenced_block::half); 106 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); 107 boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); 108 BOOST_ASIO_HANDLER_INVOCATION_END; 109 } 110 } 111 112 private: 113 Handler handler_; 114 }; 115 116 } // namespace detail 117 } // namespace asio 118 } // namespace boost 119 120 #include <boost/asio/detail/pop_options.hpp> 121 122 #endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_SEND_OP_HPP 123