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1 | // |
2 | // detail/win_iocp_socket_recvmsg_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_WIN_IOCP_SOCKET_RECVMSG_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_WIN_IOCP_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 | ||
20 | #if defined(BOOST_ASIO_HAS_IOCP) | |
21 | ||
22 | #include <boost/asio/detail/addressof.hpp> | |
23 | #include <boost/asio/detail/bind_handler.hpp> | |
24 | #include <boost/asio/detail/buffer_sequence_adapter.hpp> | |
25 | #include <boost/asio/detail/fenced_block.hpp> | |
26 | #include <boost/asio/detail/handler_alloc_helpers.hpp> | |
27 | #include <boost/asio/detail/handler_invoke_helpers.hpp> | |
28 | #include <boost/asio/detail/operation.hpp> | |
29 | #include <boost/asio/detail/socket_ops.hpp> | |
30 | #include <boost/asio/error.hpp> | |
31 | #include <boost/asio/socket_base.hpp> | |
32 | ||
33 | #include <boost/asio/detail/push_options.hpp> | |
34 | ||
35 | namespace boost { | |
36 | namespace asio { | |
37 | namespace detail { | |
38 | ||
39 | template <typename MutableBufferSequence, typename Handler> | |
40 | class win_iocp_socket_recvmsg_op : public operation | |
41 | { | |
42 | public: | |
43 | BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_socket_recvmsg_op); | |
44 | ||
45 | win_iocp_socket_recvmsg_op( | |
46 | socket_ops::weak_cancel_token_type cancel_token, | |
47 | const MutableBufferSequence& buffers, | |
48 | socket_base::message_flags& out_flags, Handler& handler) | |
49 | : operation(&win_iocp_socket_recvmsg_op::do_complete), | |
50 | cancel_token_(cancel_token), | |
51 | buffers_(buffers), | |
52 | out_flags_(out_flags), | |
53 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) | |
54 | { | |
55 | } | |
56 | ||
57 | static void do_complete(io_service_impl* owner, operation* base, | |
58 | const boost::system::error_code& result_ec, | |
59 | std::size_t bytes_transferred) | |
60 | { | |
61 | boost::system::error_code ec(result_ec); | |
62 | ||
63 | // Take ownership of the operation object. | |
64 | win_iocp_socket_recvmsg_op* o( | |
65 | static_cast<win_iocp_socket_recvmsg_op*>(base)); | |
66 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
67 | ||
68 | BOOST_ASIO_HANDLER_COMPLETION((o)); | |
69 | ||
70 | #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) | |
71 | // Check whether buffers are still valid. | |
72 | if (owner) | |
73 | { | |
74 | buffer_sequence_adapter<boost::asio::mutable_buffer, | |
75 | MutableBufferSequence>::validate(o->buffers_); | |
76 | } | |
77 | #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) | |
78 | ||
79 | socket_ops::complete_iocp_recvmsg(o->cancel_token_, ec); | |
80 | o->out_flags_ = 0; | |
81 | ||
82 | // Make a copy of the handler so that the memory can be deallocated before | |
83 | // the upcall is made. Even if we're not about to make an upcall, a | |
84 | // sub-object of the handler may be the true owner of the memory associated | |
85 | // with the handler. Consequently, a local copy of the handler is required | |
86 | // to ensure that any owning sub-object remains valid until after we have | |
87 | // deallocated the memory here. | |
88 | detail::binder2<Handler, boost::system::error_code, std::size_t> | |
89 | handler(o->handler_, ec, bytes_transferred); | |
90 | p.h = boost::asio::detail::addressof(handler.handler_); | |
91 | p.reset(); | |
92 | ||
93 | // Make the upcall if required. | |
94 | if (owner) | |
95 | { | |
96 | fenced_block b(fenced_block::half); | |
97 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
98 | boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); | |
99 | BOOST_ASIO_HANDLER_INVOCATION_END; | |
100 | } | |
101 | } | |
102 | ||
103 | private: | |
104 | socket_ops::weak_cancel_token_type cancel_token_; | |
105 | MutableBufferSequence buffers_; | |
106 | socket_base::message_flags& out_flags_; | |
107 | Handler handler_; | |
108 | }; | |
109 | ||
110 | } // namespace detail | |
111 | } // namespace asio | |
112 | } // namespace boost | |
113 | ||
114 | #include <boost/asio/detail/pop_options.hpp> | |
115 | ||
116 | #endif // defined(BOOST_ASIO_HAS_IOCP) | |
117 | ||
118 | #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_RECVMSG_OP_HPP |