1//
2// detail/reactive_socket_sendto_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_SENDTO_OP_HPP
12#define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_SENDTO_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, typename Endpoint>
33class reactive_socket_sendto_op_base : public reactor_op
34{
35public:
36 reactive_socket_sendto_op_base(socket_type socket,
37 const ConstBufferSequence& buffers, const Endpoint& endpoint,
38 socket_base::message_flags flags, func_type complete_func)
39 : reactor_op(&reactive_socket_sendto_op_base::do_perform, complete_func),
40 socket_(socket),
41 buffers_(buffers),
42 destination_(endpoint),
43 flags_(flags)
44 {
45 }
46
47 static bool do_perform(reactor_op* base)
48 {
49 reactive_socket_sendto_op_base* o(
50 static_cast<reactive_socket_sendto_op_base*>(base));
51
52 buffer_sequence_adapter<boost::asio::const_buffer,
53 ConstBufferSequence> bufs(o->buffers_);
54
55 return socket_ops::non_blocking_sendto(s: o->socket_,
56 bufs: bufs.buffers(), count: bufs.count(), flags: o->flags_,
57 addr: o->destination_.data(), addrlen: o->destination_.size(),
58 ec&: o->ec_, bytes_transferred&: o->bytes_transferred_);
59 }
60
61private:
62 socket_type socket_;
63 ConstBufferSequence buffers_;
64 Endpoint destination_;
65 socket_base::message_flags flags_;
66};
67
68template <typename ConstBufferSequence, typename Endpoint, typename Handler>
69class reactive_socket_sendto_op :
70 public reactive_socket_sendto_op_base<ConstBufferSequence, Endpoint>
71{
72public:
73 BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_sendto_op);
74
75 reactive_socket_sendto_op(socket_type socket,
76 const ConstBufferSequence& buffers, const Endpoint& endpoint,
77 socket_base::message_flags flags, Handler& handler)
78 : reactive_socket_sendto_op_base<ConstBufferSequence, Endpoint>(socket,
79 buffers, endpoint, flags, &reactive_socket_sendto_op::do_complete),
80 handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
81 {
82 }
83
84 static void do_complete(io_service_impl* owner, operation* base,
85 const boost::system::error_code& /*ec*/,
86 std::size_t /*bytes_transferred*/)
87 {
88 // Take ownership of the handler object.
89 reactive_socket_sendto_op* o(static_cast<reactive_socket_sendto_op*>(base));
90 ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
91
92 BOOST_ASIO_HANDLER_COMPLETION((o));
93
94 // Make a copy of the handler so that the memory can be deallocated before
95 // the upcall is made. Even if we're not about to make an upcall, a
96 // sub-object of the handler may be the true owner of the memory associated
97 // with the handler. Consequently, a local copy of the handler is required
98 // to ensure that any owning sub-object remains valid until after we have
99 // deallocated the memory here.
100 detail::binder2<Handler, boost::system::error_code, std::size_t>
101 handler(o->handler_, o->ec_, o->bytes_transferred_);
102 p.h = boost::asio::detail::addressof(handler.handler_);
103 p.reset();
104
105 // Make the upcall if required.
106 if (owner)
107 {
108 fenced_block b(fenced_block::half);
109 BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
110 boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_);
111 BOOST_ASIO_HANDLER_INVOCATION_END;
112 }
113 }
114
115private:
116 Handler handler_;
117};
118
119} // namespace detail
120} // namespace asio
121} // namespace boost
122
123#include <boost/asio/detail/pop_options.hpp>
124
125#endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_SENDTO_OP_HPP
126

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