]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | // |
2 | // detail/descriptor_write_op.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
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_DESCRIPTOR_WRITE_OP_HPP | |
12 | #define BOOST_ASIO_DETAIL_DESCRIPTOR_WRITE_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_WINDOWS) && !defined(__CYGWIN__) | |
21 | ||
22 | #include <boost/asio/detail/addressof.hpp> | |
23 | #include <boost/asio/detail/bind_handler.hpp> | |
24 | #include <boost/asio/detail/buffer_sequence_adapter.hpp> | |
25 | #include <boost/asio/detail/descriptor_ops.hpp> | |
26 | #include <boost/asio/detail/fenced_block.hpp> | |
27 | #include <boost/asio/detail/reactor_op.hpp> | |
28 | ||
29 | #include <boost/asio/detail/push_options.hpp> | |
30 | ||
31 | namespace boost { | |
32 | namespace asio { | |
33 | namespace detail { | |
34 | ||
35 | template <typename ConstBufferSequence> | |
36 | class descriptor_write_op_base : public reactor_op | |
37 | { | |
38 | public: | |
39 | descriptor_write_op_base(int descriptor, | |
40 | const ConstBufferSequence& buffers, func_type complete_func) | |
41 | : reactor_op(&descriptor_write_op_base::do_perform, complete_func), | |
42 | descriptor_(descriptor), | |
43 | buffers_(buffers) | |
44 | { | |
45 | } | |
46 | ||
47 | static bool do_perform(reactor_op* base) | |
48 | { | |
49 | descriptor_write_op_base* o(static_cast<descriptor_write_op_base*>(base)); | |
50 | ||
51 | buffer_sequence_adapter<boost::asio::const_buffer, | |
52 | ConstBufferSequence> bufs(o->buffers_); | |
53 | ||
54 | return descriptor_ops::non_blocking_write(o->descriptor_, | |
55 | bufs.buffers(), bufs.count(), o->ec_, o->bytes_transferred_); | |
56 | } | |
57 | ||
58 | private: | |
59 | int descriptor_; | |
60 | ConstBufferSequence buffers_; | |
61 | }; | |
62 | ||
63 | template <typename ConstBufferSequence, typename Handler> | |
64 | class descriptor_write_op | |
65 | : public descriptor_write_op_base<ConstBufferSequence> | |
66 | { | |
67 | public: | |
68 | BOOST_ASIO_DEFINE_HANDLER_PTR(descriptor_write_op); | |
69 | ||
70 | descriptor_write_op(int descriptor, | |
71 | const ConstBufferSequence& buffers, Handler& handler) | |
72 | : descriptor_write_op_base<ConstBufferSequence>( | |
73 | descriptor, buffers, &descriptor_write_op::do_complete), | |
74 | handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler)) | |
75 | { | |
76 | } | |
77 | ||
78 | static void do_complete(io_service_impl* owner, operation* base, | |
79 | const boost::system::error_code& /*ec*/, | |
80 | std::size_t /*bytes_transferred*/) | |
81 | { | |
82 | // Take ownership of the handler object. | |
83 | descriptor_write_op* o(static_cast<descriptor_write_op*>(base)); | |
84 | ptr p = { boost::asio::detail::addressof(o->handler_), o, o }; | |
85 | ||
86 | BOOST_ASIO_HANDLER_COMPLETION((o)); | |
87 | ||
88 | // Make a copy of the handler so that the memory can be deallocated before | |
89 | // the upcall is made. Even if we're not about to make an upcall, a | |
90 | // sub-object of the handler may be the true owner of the memory associated | |
91 | // with the handler. Consequently, a local copy of the handler is required | |
92 | // to ensure that any owning sub-object remains valid until after we have | |
93 | // deallocated the memory here. | |
94 | detail::binder2<Handler, boost::system::error_code, std::size_t> | |
95 | handler(o->handler_, o->ec_, o->bytes_transferred_); | |
96 | p.h = boost::asio::detail::addressof(handler.handler_); | |
97 | p.reset(); | |
98 | ||
99 | // Make the upcall if required. | |
100 | if (owner) | |
101 | { | |
102 | fenced_block b(fenced_block::half); | |
103 | BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); | |
104 | boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_); | |
105 | BOOST_ASIO_HANDLER_INVOCATION_END; | |
106 | } | |
107 | } | |
108 | ||
109 | private: | |
110 | Handler handler_; | |
111 | }; | |
112 | ||
113 | } // namespace detail | |
114 | } // namespace asio | |
115 | } // namespace boost | |
116 | ||
117 | #include <boost/asio/detail/pop_options.hpp> | |
118 | ||
119 | #endif // !defined(BOOST_ASIO_WINDOWS) && !defined(__CYGWIN__) | |
120 | ||
121 | #endif // BOOST_ASIO_DETAIL_DESCRIPTOR_WRITE_OP_HPP |