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1 | // |
2 | // detail/reactive_socket_send_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 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: | |
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(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 | ||
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 | ||
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 |