]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | // |
2 | // detail/win_iocp_overlapped_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
f67539c2 | 5 | // Copyright (c) 2003-2020 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 | ||
22 | #include <boost/asio/error.hpp> | |
7c673cae FG |
23 | #include <boost/asio/detail/bind_handler.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> |
7c673cae FG |
28 | #include <boost/asio/detail/operation.hpp> |
29 | ||
30 | #include <boost/asio/detail/push_options.hpp> | |
31 | ||
32 | namespace boost { | |
33 | namespace asio { | |
34 | namespace detail { | |
35 | ||
92f5a8d4 | 36 | template <typename Handler, typename IoExecutor> |
7c673cae FG |
37 | class win_iocp_overlapped_op : public operation |
38 | { | |
39 | public: | |
40 | BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_overlapped_op); | |
41 | ||
92f5a8d4 | 42 | win_iocp_overlapped_op(Handler& handler, const IoExecutor& io_ex) |
7c673cae | 43 | : operation(&win_iocp_overlapped_op::do_complete), |
92f5a8d4 TL |
44 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)), |
45 | io_executor_(io_ex) | |
7c673cae | 46 | { |
92f5a8d4 | 47 | handler_work<Handler, IoExecutor>::start(handler_, io_executor_); |
7c673cae FG |
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 }; | |
92f5a8d4 | 56 | handler_work<Handler, IoExecutor> w(o->handler_, o->io_executor_); |
7c673cae | 57 | |
b32b8144 | 58 | BOOST_ASIO_HANDLER_COMPLETION((*o)); |
7c673cae FG |
59 | |
60 | // Make a copy of the handler so that the memory can be deallocated before | |
61 | // the upcall is made. Even if we're not about to make an upcall, a | |
62 | // sub-object of the handler may be the true owner of the memory associated | |
63 | // with the handler. Consequently, a local copy of the handler is required | |
64 | // to ensure that any owning sub-object remains valid until after we have | |
65 | // deallocated the memory here. | |
66 | detail::binder2<Handler, boost::system::error_code, std::size_t> | |
67 | handler(o->handler_, ec, bytes_transferred); | |
68 | p.h = boost::asio::detail::addressof(handler.handler_); | |
69 | p.reset(); | |
70 | ||
71 | // Make the upcall if required. | |
72 | if (owner) | |
73 | { | |
74 | fenced_block b(fenced_block::half); | |
75 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
b32b8144 | 76 | w.complete(handler, handler.handler_); |
7c673cae FG |
77 | BOOST_ASIO_HANDLER_INVOCATION_END; |
78 | } | |
79 | } | |
80 | ||
81 | private: | |
82 | Handler handler_; | |
92f5a8d4 | 83 | IoExecutor io_executor_; |
7c673cae FG |
84 | }; |
85 | ||
86 | } // namespace detail | |
87 | } // namespace asio | |
88 | } // namespace boost | |
89 | ||
90 | #include <boost/asio/detail/pop_options.hpp> | |
91 | ||
92 | #endif // defined(BOOST_ASIO_HAS_IOCP) | |
93 | ||
94 | #endif // BOOST_ASIO_DETAIL_WIN_IOCP_OVERLAPPED_OP_HPP |