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 ASIO_DETAIL_REACTIVE_SOCKET_SEND_OP_HPP 12 #define ASIO_DETAIL_REACTIVE_SOCKET_SEND_OP_HPP 13 14 15 #include "asio/detail/config.hpp" 16 #include "asio/detail/addressof.hpp" 17 #include "asio/detail/bind_handler.hpp" 18 #include "asio/detail/buffer_sequence_adapter.hpp" 19 #include "asio/detail/fenced_block.hpp" 20 #include "asio/detail/reactor_op.hpp" 21 #include "asio/detail/socket_ops.hpp" 22 23 #include "asio/detail/push_options.hpp" 24 25 namespace asio { 26 namespace detail { 27 28 template <typename ConstBufferSequence> 29 class reactive_socket_send_op_base : public reactor_op 30 { 31 public: reactive_socket_send_op_base(socket_type socket,const ConstBufferSequence & buffers,socket_base::message_flags flags,func_type complete_func)32 reactive_socket_send_op_base(socket_type socket, 33 const ConstBufferSequence& buffers, 34 socket_base::message_flags flags, func_type complete_func) 35 : reactor_op(&reactive_socket_send_op_base::do_perform, complete_func), 36 socket_(socket), 37 buffers_(buffers), 38 flags_(flags) 39 { 40 } 41 do_perform(reactor_op * base)42 static bool do_perform(reactor_op* base) 43 { 44 reactive_socket_send_op_base* o( 45 static_cast<reactive_socket_send_op_base*>(base)); 46 47 buffer_sequence_adapter<asio::const_buffer, 48 ConstBufferSequence> bufs(o->buffers_); 49 50 return socket_ops::non_blocking_send(o->socket_, 51 bufs.buffers(), bufs.count(), o->flags_, 52 o->ec_, o->bytes_transferred_); 53 } 54 55 private: 56 socket_type socket_; 57 ConstBufferSequence buffers_; 58 socket_base::message_flags flags_; 59 }; 60 61 template <typename ConstBufferSequence, typename Handler> 62 class reactive_socket_send_op : 63 public reactive_socket_send_op_base<ConstBufferSequence> 64 { 65 public: 66 ASIO_DEFINE_HANDLER_PTR(reactive_socket_send_op); 67 reactive_socket_send_op(socket_type socket,const ConstBufferSequence & buffers,socket_base::message_flags flags,Handler & handler)68 reactive_socket_send_op(socket_type socket, 69 const ConstBufferSequence& buffers, 70 socket_base::message_flags flags, Handler& handler) 71 : reactive_socket_send_op_base<ConstBufferSequence>(socket, 72 buffers, flags, &reactive_socket_send_op::do_complete), 73 handler_(ASIO_MOVE_CAST(Handler)(handler)) 74 { 75 } 76 do_complete(io_service_impl * owner,operation * base,const asio::error_code &,std::size_t)77 static void do_complete(io_service_impl* owner, operation* base, 78 const asio::error_code& /*ec*/, 79 std::size_t /*bytes_transferred*/) 80 { 81 // Take ownership of the handler object. 82 reactive_socket_send_op* o(static_cast<reactive_socket_send_op*>(base)); 83 ptr p = { asio::detail::addressof(o->handler_), o, o }; 84 85 ASIO_HANDLER_COMPLETION((o)); 86 87 // Make a copy of the handler so that the memory can be deallocated before 88 // the upcall is made. Even if we're not about to make an upcall, a 89 // sub-object of the handler may be the true owner of the memory associated 90 // with the handler. Consequently, a local copy of the handler is required 91 // to ensure that any owning sub-object remains valid until after we have 92 // deallocated the memory here. 93 detail::binder2<Handler, asio::error_code, std::size_t> 94 handler(o->handler_, o->ec_, o->bytes_transferred_); 95 p.h = asio::detail::addressof(handler.handler_); 96 p.reset(); 97 98 // Make the upcall if required. 99 if (owner) 100 { 101 fenced_block b(fenced_block::half); 102 ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); 103 asio_handler_invoke_helpers::invoke(handler, handler.handler_); 104 ASIO_HANDLER_INVOCATION_END; 105 } 106 } 107 108 private: 109 Handler handler_; 110 }; 111 112 } // namespace detail 113 } // namespace asio 114 115 #include "asio/detail/pop_options.hpp" 116 117 #endif // ASIO_DETAIL_REACTIVE_SOCKET_SEND_OP_HPP 118