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1 | // |
2 | // detail/impl/reactive_descriptor_service.ipp | |
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_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP | |
12 | #define BOOST_ASIO_DETAIL_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP | |
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) \ | |
21 | && !defined(BOOST_ASIO_WINDOWS_RUNTIME) \ | |
22 | && !defined(__CYGWIN__) | |
23 | ||
24 | #include <boost/asio/error.hpp> | |
25 | #include <boost/asio/detail/reactive_descriptor_service.hpp> | |
26 | ||
27 | #include <boost/asio/detail/push_options.hpp> | |
28 | ||
29 | namespace boost { | |
30 | namespace asio { | |
31 | namespace detail { | |
32 | ||
33 | reactive_descriptor_service::reactive_descriptor_service( | |
34 | boost::asio::io_service& io_service) | |
35 | : reactor_(boost::asio::use_service<reactor>(io_service)) | |
36 | { | |
37 | reactor_.init_task(); | |
38 | } | |
39 | ||
40 | void reactive_descriptor_service::shutdown_service() | |
41 | { | |
42 | } | |
43 | ||
44 | void reactive_descriptor_service::construct( | |
45 | reactive_descriptor_service::implementation_type& impl) | |
46 | { | |
47 | impl.descriptor_ = -1; | |
48 | impl.state_ = 0; | |
49 | } | |
50 | ||
51 | void reactive_descriptor_service::move_construct( | |
52 | reactive_descriptor_service::implementation_type& impl, | |
53 | reactive_descriptor_service::implementation_type& other_impl) | |
54 | { | |
55 | impl.descriptor_ = other_impl.descriptor_; | |
56 | other_impl.descriptor_ = -1; | |
57 | ||
58 | impl.state_ = other_impl.state_; | |
59 | other_impl.state_ = 0; | |
60 | ||
61 | reactor_.move_descriptor(impl.descriptor_, | |
62 | impl.reactor_data_, other_impl.reactor_data_); | |
63 | } | |
64 | ||
65 | void reactive_descriptor_service::move_assign( | |
66 | reactive_descriptor_service::implementation_type& impl, | |
67 | reactive_descriptor_service& other_service, | |
68 | reactive_descriptor_service::implementation_type& other_impl) | |
69 | { | |
70 | destroy(impl); | |
71 | ||
72 | impl.descriptor_ = other_impl.descriptor_; | |
73 | other_impl.descriptor_ = -1; | |
74 | ||
75 | impl.state_ = other_impl.state_; | |
76 | other_impl.state_ = 0; | |
77 | ||
78 | other_service.reactor_.move_descriptor(impl.descriptor_, | |
79 | impl.reactor_data_, other_impl.reactor_data_); | |
80 | } | |
81 | ||
82 | void reactive_descriptor_service::destroy( | |
83 | reactive_descriptor_service::implementation_type& impl) | |
84 | { | |
85 | if (is_open(impl)) | |
86 | { | |
87 | BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "close")); | |
88 | ||
89 | reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_, | |
90 | (impl.state_ & descriptor_ops::possible_dup) == 0); | |
91 | } | |
92 | ||
93 | boost::system::error_code ignored_ec; | |
94 | descriptor_ops::close(impl.descriptor_, impl.state_, ignored_ec); | |
95 | } | |
96 | ||
97 | boost::system::error_code reactive_descriptor_service::assign( | |
98 | reactive_descriptor_service::implementation_type& impl, | |
99 | const native_handle_type& native_descriptor, boost::system::error_code& ec) | |
100 | { | |
101 | if (is_open(impl)) | |
102 | { | |
103 | ec = boost::asio::error::already_open; | |
104 | return ec; | |
105 | } | |
106 | ||
107 | if (int err = reactor_.register_descriptor( | |
108 | native_descriptor, impl.reactor_data_)) | |
109 | { | |
110 | ec = boost::system::error_code(err, | |
111 | boost::asio::error::get_system_category()); | |
112 | return ec; | |
113 | } | |
114 | ||
115 | impl.descriptor_ = native_descriptor; | |
116 | impl.state_ = descriptor_ops::possible_dup; | |
117 | ec = boost::system::error_code(); | |
118 | return ec; | |
119 | } | |
120 | ||
121 | boost::system::error_code reactive_descriptor_service::close( | |
122 | reactive_descriptor_service::implementation_type& impl, | |
123 | boost::system::error_code& ec) | |
124 | { | |
125 | if (is_open(impl)) | |
126 | { | |
127 | BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "close")); | |
128 | ||
129 | reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_, | |
130 | (impl.state_ & descriptor_ops::possible_dup) == 0); | |
131 | } | |
132 | ||
133 | descriptor_ops::close(impl.descriptor_, impl.state_, ec); | |
134 | ||
135 | // The descriptor is closed by the OS even if close() returns an error. | |
136 | // | |
137 | // (Actually, POSIX says the state of the descriptor is unspecified. On | |
138 | // Linux the descriptor is apparently closed anyway; e.g. see | |
139 | // http://lkml.org/lkml/2005/9/10/129 | |
140 | // We'll just have to assume that other OSes follow the same behaviour.) | |
141 | construct(impl); | |
142 | ||
143 | return ec; | |
144 | } | |
145 | ||
146 | reactive_descriptor_service::native_handle_type | |
147 | reactive_descriptor_service::release( | |
148 | reactive_descriptor_service::implementation_type& impl) | |
149 | { | |
150 | native_handle_type descriptor = impl.descriptor_; | |
151 | ||
152 | if (is_open(impl)) | |
153 | { | |
154 | BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "release")); | |
155 | ||
156 | reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_, false); | |
157 | construct(impl); | |
158 | } | |
159 | ||
160 | return descriptor; | |
161 | } | |
162 | ||
163 | boost::system::error_code reactive_descriptor_service::cancel( | |
164 | reactive_descriptor_service::implementation_type& impl, | |
165 | boost::system::error_code& ec) | |
166 | { | |
167 | if (!is_open(impl)) | |
168 | { | |
169 | ec = boost::asio::error::bad_descriptor; | |
170 | return ec; | |
171 | } | |
172 | ||
173 | BOOST_ASIO_HANDLER_OPERATION(("descriptor", &impl, "cancel")); | |
174 | ||
175 | reactor_.cancel_ops(impl.descriptor_, impl.reactor_data_); | |
176 | ec = boost::system::error_code(); | |
177 | return ec; | |
178 | } | |
179 | ||
180 | void reactive_descriptor_service::start_op( | |
181 | reactive_descriptor_service::implementation_type& impl, | |
182 | int op_type, reactor_op* op, bool is_continuation, | |
183 | bool is_non_blocking, bool noop) | |
184 | { | |
185 | if (!noop) | |
186 | { | |
187 | if ((impl.state_ & descriptor_ops::non_blocking) || | |
188 | descriptor_ops::set_internal_non_blocking( | |
189 | impl.descriptor_, impl.state_, true, op->ec_)) | |
190 | { | |
191 | reactor_.start_op(op_type, impl.descriptor_, | |
192 | impl.reactor_data_, op, is_continuation, is_non_blocking); | |
193 | return; | |
194 | } | |
195 | } | |
196 | ||
197 | reactor_.post_immediate_completion(op, is_continuation); | |
198 | } | |
199 | ||
200 | } // namespace detail | |
201 | } // namespace asio | |
202 | } // namespace boost | |
203 | ||
204 | #include <boost/asio/detail/pop_options.hpp> | |
205 | ||
206 | #endif // !defined(BOOST_ASIO_WINDOWS) | |
207 | // && !defined(BOOST_ASIO_WINDOWS_RUNTIME) | |
208 | // && !defined(__CYGWIN__) | |
209 | ||
210 | #endif // BOOST_ASIO_DETAIL_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP |