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1 | // |
2 | // detail/win_iocp_null_buffers_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
1e59de90 | 5 | // Copyright (c) 2003-2022 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_WIN_IOCP_NULL_BUFFERS_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_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 | ||
7c673cae | 22 | #include <boost/asio/detail/bind_handler.hpp> |
7c673cae FG |
23 | #include <boost/asio/detail/fenced_block.hpp> |
24 | #include <boost/asio/detail/handler_alloc_helpers.hpp> | |
25 | #include <boost/asio/detail/handler_invoke_helpers.hpp> | |
20effc67 | 26 | #include <boost/asio/detail/handler_work.hpp> |
b32b8144 | 27 | #include <boost/asio/detail/memory.hpp> |
7c673cae FG |
28 | #include <boost/asio/detail/reactor_op.hpp> |
29 | #include <boost/asio/detail/socket_ops.hpp> | |
30 | #include <boost/asio/error.hpp> | |
31 | ||
32 | #include <boost/asio/detail/push_options.hpp> | |
33 | ||
34 | namespace boost { | |
35 | namespace asio { | |
36 | namespace detail { | |
37 | ||
92f5a8d4 | 38 | template <typename Handler, typename IoExecutor> |
7c673cae FG |
39 | class win_iocp_null_buffers_op : public reactor_op |
40 | { | |
41 | public: | |
42 | BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_null_buffers_op); | |
43 | ||
44 | win_iocp_null_buffers_op(socket_ops::weak_cancel_token_type cancel_token, | |
92f5a8d4 | 45 | Handler& handler, const IoExecutor& io_ex) |
20effc67 TL |
46 | : reactor_op(boost::system::error_code(), |
47 | &win_iocp_null_buffers_op::do_perform, | |
7c673cae FG |
48 | &win_iocp_null_buffers_op::do_complete), |
49 | cancel_token_(cancel_token), | |
92f5a8d4 | 50 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)), |
20effc67 | 51 | work_(handler_, io_ex) |
7c673cae FG |
52 | { |
53 | } | |
54 | ||
b32b8144 | 55 | static status do_perform(reactor_op*) |
7c673cae | 56 | { |
b32b8144 | 57 | return done; |
7c673cae FG |
58 | } |
59 | ||
b32b8144 | 60 | static void do_complete(void* owner, operation* base, |
7c673cae FG |
61 | const boost::system::error_code& result_ec, |
62 | std::size_t bytes_transferred) | |
63 | { | |
64 | boost::system::error_code ec(result_ec); | |
65 | ||
66 | // Take ownership of the operation object. | |
67 | win_iocp_null_buffers_op* o(static_cast<win_iocp_null_buffers_op*>(base)); | |
68 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
69 | ||
b32b8144 | 70 | BOOST_ASIO_HANDLER_COMPLETION((*o)); |
7c673cae | 71 | |
20effc67 TL |
72 | // Take ownership of the operation's outstanding work. |
73 | handler_work<Handler, IoExecutor> w( | |
74 | BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)( | |
75 | o->work_)); | |
76 | ||
7c673cae FG |
77 | // The reactor may have stored a result in the operation object. |
78 | if (o->ec_) | |
79 | ec = o->ec_; | |
80 | ||
81 | // Map non-portable errors to their portable counterparts. | |
82 | if (ec.value() == ERROR_NETNAME_DELETED) | |
83 | { | |
84 | if (o->cancel_token_.expired()) | |
85 | ec = boost::asio::error::operation_aborted; | |
86 | else | |
87 | ec = boost::asio::error::connection_reset; | |
88 | } | |
89 | else if (ec.value() == ERROR_PORT_UNREACHABLE) | |
90 | { | |
91 | ec = boost::asio::error::connection_refused; | |
92 | } | |
93 | ||
94 | // Make a copy of the handler so that the memory can be deallocated before | |
95 | // the upcall is made. Even if we're not about to make an upcall, a | |
96 | // sub-object of the handler may be the true owner of the memory associated | |
97 | // with the handler. Consequently, a local copy of the handler is required | |
98 | // to ensure that any owning sub-object remains valid until after we have | |
99 | // deallocated the memory here. | |
100 | detail::binder2<Handler, boost::system::error_code, std::size_t> | |
101 | handler(o->handler_, ec, bytes_transferred); | |
102 | p.h = boost::asio::detail::addressof(handler.handler_); | |
103 | p.reset(); | |
104 | ||
105 | // Make the upcall if required. | |
106 | if (owner) | |
107 | { | |
108 | fenced_block b(fenced_block::half); | |
109 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
b32b8144 | 110 | w.complete(handler, handler.handler_); |
7c673cae FG |
111 | BOOST_ASIO_HANDLER_INVOCATION_END; |
112 | } | |
113 | } | |
114 | ||
115 | private: | |
116 | socket_ops::weak_cancel_token_type cancel_token_; | |
117 | Handler handler_; | |
20effc67 | 118 | handler_work<Handler, IoExecutor> work_; |
7c673cae FG |
119 | }; |
120 | ||
121 | } // namespace detail | |
122 | } // namespace asio | |
123 | } // namespace boost | |
124 | ||
125 | #include <boost/asio/detail/pop_options.hpp> | |
126 | ||
127 | #endif // defined(BOOST_ASIO_HAS_IOCP) | |
128 | ||
129 | #endif // BOOST_ASIO_DETAIL_WIN_IOCP_NULL_BUFFERS_OP_HPP |