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1 | // |
2 | // detail/win_iocp_overlapped_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_OVERLAPPED_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_WIN_IOCP_OVERLAPPED_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 FG |
22 | #include <boost/asio/detail/bind_handler.hpp> |
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 | 28 | #include <boost/asio/detail/operation.hpp> |
20effc67 | 29 | #include <boost/asio/error.hpp> |
7c673cae FG |
30 | |
31 | #include <boost/asio/detail/push_options.hpp> | |
32 | ||
33 | namespace boost { | |
34 | namespace asio { | |
35 | namespace detail { | |
36 | ||
92f5a8d4 | 37 | template <typename Handler, typename IoExecutor> |
7c673cae FG |
38 | class win_iocp_overlapped_op : public operation |
39 | { | |
40 | public: | |
41 | BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_overlapped_op); | |
42 | ||
92f5a8d4 | 43 | win_iocp_overlapped_op(Handler& handler, const IoExecutor& io_ex) |
7c673cae | 44 | : operation(&win_iocp_overlapped_op::do_complete), |
92f5a8d4 | 45 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)), |
20effc67 | 46 | work_(handler_, io_ex) |
7c673cae FG |
47 | { |
48 | } | |
49 | ||
b32b8144 | 50 | static void do_complete(void* owner, operation* base, |
7c673cae FG |
51 | const boost::system::error_code& ec, std::size_t bytes_transferred) |
52 | { | |
53 | // Take ownership of the operation object. | |
54 | win_iocp_overlapped_op* o(static_cast<win_iocp_overlapped_op*>(base)); | |
55 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
56 | ||
b32b8144 | 57 | BOOST_ASIO_HANDLER_COMPLETION((*o)); |
7c673cae | 58 | |
20effc67 TL |
59 | // Take ownership of the operation's outstanding work. |
60 | handler_work<Handler, IoExecutor> w( | |
61 | BOOST_ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)( | |
62 | o->work_)); | |
63 | ||
7c673cae FG |
64 | // Make a copy of the handler so that the memory can be deallocated before |
65 | // the upcall is made. Even if we're not about to make an upcall, a | |
66 | // sub-object of the handler may be the true owner of the memory associated | |
67 | // with the handler. Consequently, a local copy of the handler is required | |
68 | // to ensure that any owning sub-object remains valid until after we have | |
69 | // deallocated the memory here. | |
70 | detail::binder2<Handler, boost::system::error_code, std::size_t> | |
71 | handler(o->handler_, ec, bytes_transferred); | |
72 | p.h = boost::asio::detail::addressof(handler.handler_); | |
73 | p.reset(); | |
74 | ||
75 | // Make the upcall if required. | |
76 | if (owner) | |
77 | { | |
78 | fenced_block b(fenced_block::half); | |
79 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
b32b8144 | 80 | w.complete(handler, handler.handler_); |
7c673cae FG |
81 | BOOST_ASIO_HANDLER_INVOCATION_END; |
82 | } | |
83 | } | |
84 | ||
85 | private: | |
86 | Handler handler_; | |
20effc67 | 87 | handler_work<Handler, IoExecutor> work_; |
7c673cae FG |
88 | }; |
89 | ||
90 | } // namespace detail | |
91 | } // namespace asio | |
92 | } // namespace boost | |
93 | ||
94 | #include <boost/asio/detail/pop_options.hpp> | |
95 | ||
96 | #endif // defined(BOOST_ASIO_HAS_IOCP) | |
97 | ||
98 | #endif // BOOST_ASIO_DETAIL_WIN_IOCP_OVERLAPPED_OP_HPP |