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1 | // |
2 | // detail/win_iocp_handle_read_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
f67539c2 | 5 | // Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
7c673cae FG |
6 | // Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.com) |
7 | // | |
8 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
9 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
10 | // | |
11 | ||
12 | #ifndef BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_READ_OP_HPP | |
13 | #define BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_READ_OP_HPP | |
14 | ||
15 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
16 | # pragma once | |
17 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
18 | ||
19 | #include <boost/asio/detail/config.hpp> | |
20 | ||
21 | #if defined(BOOST_ASIO_HAS_IOCP) | |
22 | ||
7c673cae FG |
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> | |
20effc67 | 28 | #include <boost/asio/detail/handler_work.hpp> |
b32b8144 | 29 | #include <boost/asio/detail/memory.hpp> |
7c673cae | 30 | #include <boost/asio/detail/operation.hpp> |
20effc67 | 31 | #include <boost/asio/error.hpp> |
7c673cae FG |
32 | |
33 | #include <boost/asio/detail/push_options.hpp> | |
34 | ||
35 | namespace boost { | |
36 | namespace asio { | |
37 | namespace detail { | |
38 | ||
92f5a8d4 | 39 | template <typename MutableBufferSequence, typename Handler, typename IoExecutor> |
7c673cae FG |
40 | class win_iocp_handle_read_op : public operation |
41 | { | |
42 | public: | |
43 | BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_handle_read_op); | |
44 | ||
92f5a8d4 TL |
45 | win_iocp_handle_read_op(const MutableBufferSequence& buffers, |
46 | Handler& handler, const IoExecutor& io_ex) | |
7c673cae FG |
47 | : operation(&win_iocp_handle_read_op::do_complete), |
48 | buffers_(buffers), | |
92f5a8d4 | 49 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)), |
20effc67 | 50 | work_(handler_, io_ex) |
7c673cae FG |
51 | { |
52 | } | |
53 | ||
b32b8144 | 54 | static void do_complete(void* owner, operation* base, |
7c673cae FG |
55 | const boost::system::error_code& result_ec, |
56 | std::size_t bytes_transferred) | |
57 | { | |
58 | boost::system::error_code ec(result_ec); | |
59 | ||
60 | // Take ownership of the operation object. | |
61 | win_iocp_handle_read_op* o(static_cast<win_iocp_handle_read_op*>(base)); | |
62 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
63 | ||
b32b8144 | 64 | BOOST_ASIO_HANDLER_COMPLETION((*o)); |
7c673cae | 65 | |
20effc67 TL |
66 | // Take ownership of the operation's outstanding work. |
67 | handler_work<Handler, IoExecutor> w( | |
68 | BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)( | |
69 | o->work_)); | |
70 | ||
7c673cae FG |
71 | #if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) |
72 | if (owner) | |
73 | { | |
74 | // Check whether buffers are still valid. | |
75 | buffer_sequence_adapter<boost::asio::mutable_buffer, | |
76 | MutableBufferSequence>::validate(o->buffers_); | |
77 | } | |
78 | #endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING) | |
79 | ||
80 | // Map non-portable errors to their portable counterparts. | |
81 | if (ec.value() == ERROR_HANDLE_EOF) | |
82 | ec = boost::asio::error::eof; | |
83 | ||
84 | // Make a copy of the handler so that the memory can be deallocated before | |
85 | // the upcall is made. Even if we're not about to make an upcall, a | |
86 | // sub-object of the handler may be the true owner of the memory associated | |
87 | // with the handler. Consequently, a local copy of the handler is required | |
88 | // to ensure that any owning sub-object remains valid until after we have | |
89 | // deallocated the memory here. | |
90 | detail::binder2<Handler, boost::system::error_code, std::size_t> | |
91 | handler(o->handler_, ec, bytes_transferred); | |
92 | p.h = boost::asio::detail::addressof(handler.handler_); | |
93 | p.reset(); | |
94 | ||
95 | // Make the upcall if required. | |
96 | if (owner) | |
97 | { | |
98 | fenced_block b(fenced_block::half); | |
99 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
b32b8144 | 100 | w.complete(handler, handler.handler_); |
7c673cae FG |
101 | BOOST_ASIO_HANDLER_INVOCATION_END; |
102 | } | |
103 | } | |
104 | ||
105 | private: | |
106 | MutableBufferSequence buffers_; | |
107 | Handler handler_; | |
20effc67 | 108 | handler_work<Handler, IoExecutor> work_; |
7c673cae FG |
109 | }; |
110 | ||
111 | } // namespace detail | |
112 | } // namespace asio | |
113 | } // namespace boost | |
114 | ||
115 | #include <boost/asio/detail/pop_options.hpp> | |
116 | ||
117 | #endif // defined(BOOST_ASIO_HAS_IOCP) | |
118 | ||
119 | #endif // BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_READ_OP_HPP |