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1 | // |
2 | // detail/winrt_socket_recv_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
b32b8144 | 5 | // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
7c673cae FG |
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_WINRT_SOCKET_RECV_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_WINRT_SOCKET_RECV_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_WINDOWS_RUNTIME) | |
21 | ||
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22 | #include <boost/asio/detail/bind_handler.hpp> |
23 | #include <boost/asio/detail/buffer_sequence_adapter.hpp> | |
24 | #include <boost/asio/detail/fenced_block.hpp> | |
25 | #include <boost/asio/detail/handler_alloc_helpers.hpp> | |
26 | #include <boost/asio/detail/handler_invoke_helpers.hpp> | |
b32b8144 | 27 | #include <boost/asio/detail/memory.hpp> |
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28 | #include <boost/asio/detail/winrt_async_op.hpp> |
29 | #include <boost/asio/error.hpp> | |
30 | ||
31 | #include <boost/asio/detail/push_options.hpp> | |
32 | ||
33 | namespace boost { | |
34 | namespace asio { | |
35 | namespace detail { | |
36 | ||
37 | template <typename MutableBufferSequence, typename Handler> | |
38 | class winrt_socket_recv_op : | |
39 | public winrt_async_op<Windows::Storage::Streams::IBuffer^> | |
40 | { | |
41 | public: | |
42 | BOOST_ASIO_DEFINE_HANDLER_PTR(winrt_socket_recv_op); | |
43 | ||
44 | winrt_socket_recv_op(const MutableBufferSequence& buffers, Handler& handler) | |
45 | : winrt_async_op<Windows::Storage::Streams::IBuffer^>( | |
46 | &winrt_socket_recv_op::do_complete), | |
47 | buffers_(buffers), | |
48 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) | |
49 | { | |
b32b8144 | 50 | handler_work<Handler>::start(handler_); |
7c673cae FG |
51 | } |
52 | ||
b32b8144 | 53 | static void do_complete(void* owner, operation* base, |
7c673cae FG |
54 | const boost::system::error_code&, std::size_t) |
55 | { | |
56 | // Take ownership of the operation object. | |
57 | winrt_socket_recv_op* o(static_cast<winrt_socket_recv_op*>(base)); | |
58 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
b32b8144 | 59 | handler_work<Handler> w(o->handler_); |
7c673cae | 60 | |
b32b8144 | 61 | BOOST_ASIO_HANDLER_COMPLETION((*o)); |
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62 | |
63 | #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) | |
64 | // Check whether buffers are still valid. | |
65 | if (owner) | |
66 | { | |
67 | buffer_sequence_adapter<boost::asio::mutable_buffer, | |
68 | MutableBufferSequence>::validate(o->buffers_); | |
69 | } | |
70 | #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) | |
71 | ||
72 | std::size_t bytes_transferred = o->result_ ? o->result_->Length : 0; | |
73 | if (bytes_transferred == 0 && !o->ec_ && | |
74 | !buffer_sequence_adapter<boost::asio::mutable_buffer, | |
75 | MutableBufferSequence>::all_empty(o->buffers_)) | |
76 | { | |
77 | o->ec_ = boost::asio::error::eof; | |
78 | } | |
79 | ||
80 | // Make a copy of the handler so that the memory can be deallocated before | |
81 | // the upcall is made. Even if we're not about to make an upcall, a | |
82 | // sub-object of the handler may be the true owner of the memory associated | |
83 | // with the handler. Consequently, a local copy of the handler is required | |
84 | // to ensure that any owning sub-object remains valid until after we have | |
85 | // deallocated the memory here. | |
86 | detail::binder2<Handler, boost::system::error_code, std::size_t> | |
87 | handler(o->handler_, o->ec_, bytes_transferred); | |
88 | p.h = boost::asio::detail::addressof(handler.handler_); | |
89 | p.reset(); | |
90 | ||
91 | // Make the upcall if required. | |
92 | if (owner) | |
93 | { | |
94 | fenced_block b(fenced_block::half); | |
95 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
b32b8144 | 96 | w.complete(handler, handler.handler_); |
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97 | BOOST_ASIO_HANDLER_INVOCATION_END; |
98 | } | |
99 | } | |
100 | ||
101 | private: | |
102 | MutableBufferSequence buffers_; | |
103 | Handler handler_; | |
104 | }; | |
105 | ||
106 | } // namespace detail | |
107 | } // namespace asio | |
108 | } // namespace boost | |
109 | ||
110 | #include <boost/asio/detail/pop_options.hpp> | |
111 | ||
112 | #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME) | |
113 | ||
114 | #endif // BOOST_ASIO_DETAIL_WINRT_SOCKET_RECV_OP_HPP |