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1 | // |
2 | // detail/bulk_executor_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
1e59de90 | 5 | // Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
20effc67 TL |
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_BULK_EXECUTOR_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_BULK_EXECUTOR_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 | #include <boost/asio/detail/bind_handler.hpp> | |
20 | #include <boost/asio/detail/fenced_block.hpp> | |
21 | #include <boost/asio/detail/handler_alloc_helpers.hpp> | |
22 | #include <boost/asio/detail/handler_invoke_helpers.hpp> | |
23 | #include <boost/asio/detail/scheduler_operation.hpp> | |
24 | ||
25 | #include <boost/asio/detail/push_options.hpp> | |
26 | ||
27 | namespace boost { | |
28 | namespace asio { | |
29 | namespace detail { | |
30 | ||
31 | template <typename Handler, typename Alloc, | |
32 | typename Operation = scheduler_operation> | |
33 | class bulk_executor_op : public Operation | |
34 | { | |
35 | public: | |
36 | BOOST_ASIO_DEFINE_HANDLER_ALLOCATOR_PTR(bulk_executor_op); | |
37 | ||
38 | template <typename H> | |
39 | bulk_executor_op(BOOST_ASIO_MOVE_ARG(H) h, | |
40 | const Alloc& allocator, std::size_t i) | |
41 | : Operation(&bulk_executor_op::do_complete), | |
42 | handler_(BOOST_ASIO_MOVE_CAST(H)(h)), | |
43 | allocator_(allocator), | |
44 | index_(i) | |
45 | { | |
46 | } | |
47 | ||
48 | static void do_complete(void* owner, Operation* base, | |
49 | const boost::system::error_code& /*ec*/, | |
50 | std::size_t /*bytes_transferred*/) | |
51 | { | |
52 | // Take ownership of the handler object. | |
53 | bulk_executor_op* o(static_cast<bulk_executor_op*>(base)); | |
54 | Alloc allocator(o->allocator_); | |
55 | ptr p = { detail::addressof(allocator), o, o }; | |
56 | ||
57 | BOOST_ASIO_HANDLER_COMPLETION((*o)); | |
58 | ||
59 | // Make a copy of the handler so that the memory can be deallocated before | |
60 | // the upcall is made. Even if we're not about to make an upcall, a | |
61 | // sub-object of the handler may be the true owner of the memory associated | |
62 | // with the handler. Consequently, a local copy of the handler is required | |
63 | // to ensure that any owning sub-object remains valid until after we have | |
64 | // deallocated the memory here. | |
65 | detail::binder1<Handler, std::size_t> handler(o->handler_, o->index_); | |
66 | p.reset(); | |
67 | ||
68 | // Make the upcall if required. | |
69 | if (owner) | |
70 | { | |
71 | fenced_block b(fenced_block::half); | |
72 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN(()); | |
73 | boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); | |
74 | BOOST_ASIO_HANDLER_INVOCATION_END; | |
75 | } | |
76 | } | |
77 | ||
78 | private: | |
79 | Handler handler_; | |
80 | Alloc allocator_; | |
81 | std::size_t index_; | |
82 | }; | |
83 | ||
84 | } // namespace detail | |
85 | } // namespace asio | |
86 | } // namespace boost | |
87 | ||
88 | #include <boost/asio/detail/pop_options.hpp> | |
89 | ||
90 | #endif // BOOST_ASIO_DETAIL_BULK_EXECUTOR_OP_HPP |