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
28namespace boost {
29namespace asio {
30namespace detail {
31
32template <typename ConstBufferSequence>
33class reactive_socket_send_op_base : public reactor_op
34{
35public:
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
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(s: o->socket_,
55 bufs: bufs.buffers(), count: bufs.count(), flags: o->flags_,
56 ec&: o->ec_, bytes_transferred&: o->bytes_transferred_);
57 }
58
59private:
60 socket_type socket_;
61 ConstBufferSequence buffers_;
62 socket_base::message_flags flags_;
63};
64
65template <typename ConstBufferSequence, typename Handler>
66class reactive_socket_send_op :
67 public reactive_socket_send_op_base<ConstBufferSequence>
68{
69public:
70 BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_send_op);
71
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
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
112private:
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

source code of boost/boost/asio/detail/reactive_socket_send_op.hpp