1 | // |
2 | // detail/reactive_socket_recvmsg_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_RECVMSG_OP_HPP |
12 | #define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_RECVMSG_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 | #include <boost/asio/socket_base.hpp> |
26 | |
27 | #include <boost/asio/detail/push_options.hpp> |
28 | |
29 | namespace boost { |
30 | namespace asio { |
31 | namespace detail { |
32 | |
33 | template <typename MutableBufferSequence> |
34 | class reactive_socket_recvmsg_op_base : public reactor_op |
35 | { |
36 | public: |
37 | reactive_socket_recvmsg_op_base(socket_type socket, |
38 | const MutableBufferSequence& buffers, socket_base::message_flags in_flags, |
39 | socket_base::message_flags& out_flags, func_type complete_func) |
40 | : reactor_op(&reactive_socket_recvmsg_op_base::do_perform, complete_func), |
41 | socket_(socket), |
42 | buffers_(buffers), |
43 | in_flags_(in_flags), |
44 | out_flags_(out_flags) |
45 | { |
46 | } |
47 | |
48 | static bool do_perform(reactor_op* base) |
49 | { |
50 | reactive_socket_recvmsg_op_base* o( |
51 | static_cast<reactive_socket_recvmsg_op_base*>(base)); |
52 | |
53 | buffer_sequence_adapter<boost::asio::mutable_buffer, |
54 | MutableBufferSequence> bufs(o->buffers_); |
55 | |
56 | return socket_ops::non_blocking_recvmsg(s: o->socket_, |
57 | bufs: bufs.buffers(), count: bufs.count(), |
58 | in_flags: o->in_flags_, out_flags&: o->out_flags_, |
59 | ec&: o->ec_, bytes_transferred&: o->bytes_transferred_); |
60 | } |
61 | |
62 | private: |
63 | socket_type socket_; |
64 | MutableBufferSequence buffers_; |
65 | socket_base::message_flags in_flags_; |
66 | socket_base::message_flags& out_flags_; |
67 | }; |
68 | |
69 | template <typename MutableBufferSequence, typename Handler> |
70 | class reactive_socket_recvmsg_op : |
71 | public reactive_socket_recvmsg_op_base<MutableBufferSequence> |
72 | { |
73 | public: |
74 | BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_recvmsg_op); |
75 | |
76 | reactive_socket_recvmsg_op(socket_type socket, |
77 | const MutableBufferSequence& buffers, socket_base::message_flags in_flags, |
78 | socket_base::message_flags& out_flags, Handler& handler) |
79 | : reactive_socket_recvmsg_op_base<MutableBufferSequence>(socket, buffers, |
80 | in_flags, out_flags, &reactive_socket_recvmsg_op::do_complete), |
81 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) |
82 | { |
83 | } |
84 | |
85 | static void do_complete(io_service_impl* owner, operation* base, |
86 | const boost::system::error_code& /*ec*/, |
87 | std::size_t /*bytes_transferred*/) |
88 | { |
89 | // Take ownership of the handler object. |
90 | reactive_socket_recvmsg_op* o( |
91 | static_cast<reactive_socket_recvmsg_op*>(base)); |
92 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; |
93 | |
94 | BOOST_ASIO_HANDLER_COMPLETION((o)); |
95 | |
96 | // Make a copy of the handler so that the memory can be deallocated before |
97 | // the upcall is made. Even if we're not about to make an upcall, a |
98 | // sub-object of the handler may be the true owner of the memory associated |
99 | // with the handler. Consequently, a local copy of the handler is required |
100 | // to ensure that any owning sub-object remains valid until after we have |
101 | // deallocated the memory here. |
102 | detail::binder2<Handler, boost::system::error_code, std::size_t> |
103 | handler(o->handler_, o->ec_, o->bytes_transferred_); |
104 | p.h = boost::asio::detail::addressof(handler.handler_); |
105 | p.reset(); |
106 | |
107 | // Make the upcall if required. |
108 | if (owner) |
109 | { |
110 | fenced_block b(fenced_block::half); |
111 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); |
112 | boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); |
113 | BOOST_ASIO_HANDLER_INVOCATION_END; |
114 | } |
115 | } |
116 | |
117 | private: |
118 | Handler handler_; |
119 | }; |
120 | |
121 | } // namespace detail |
122 | } // namespace asio |
123 | } // namespace boost |
124 | |
125 | #include <boost/asio/detail/pop_options.hpp> |
126 | |
127 | #endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_RECVMSG_OP_HPP |
128 | |