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1 | // |
2 | // detail/impl/resolver_service_base.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_RESOLVER_SERVICE_BASE_IPP | |
12 | #define BOOST_ASIO_DETAIL_IMPL_RESOLVER_SERVICE_BASE_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 | #include <boost/asio/detail/resolver_service_base.hpp> | |
20 | ||
21 | #include <boost/asio/detail/push_options.hpp> | |
22 | ||
23 | namespace boost { | |
24 | namespace asio { | |
25 | namespace detail { | |
26 | ||
27 | class resolver_service_base::work_io_service_runner | |
28 | { | |
29 | public: | |
30 | work_io_service_runner(boost::asio::io_service& io_service) | |
31 | : io_service_(io_service) {} | |
32 | void operator()() { io_service_.run(); } | |
33 | private: | |
34 | boost::asio::io_service& io_service_; | |
35 | }; | |
36 | ||
37 | resolver_service_base::resolver_service_base( | |
38 | boost::asio::io_service& io_service) | |
39 | : io_service_impl_(boost::asio::use_service<io_service_impl>(io_service)), | |
40 | work_io_service_(new boost::asio::io_service), | |
41 | work_io_service_impl_(boost::asio::use_service< | |
42 | io_service_impl>(*work_io_service_)), | |
43 | work_(new boost::asio::io_service::work(*work_io_service_)), | |
44 | work_thread_(0) | |
45 | { | |
46 | } | |
47 | ||
48 | resolver_service_base::~resolver_service_base() | |
49 | { | |
50 | shutdown_service(); | |
51 | } | |
52 | ||
53 | void resolver_service_base::shutdown_service() | |
54 | { | |
55 | work_.reset(); | |
56 | if (work_io_service_.get()) | |
57 | { | |
58 | work_io_service_->stop(); | |
59 | if (work_thread_.get()) | |
60 | { | |
61 | work_thread_->join(); | |
62 | work_thread_.reset(); | |
63 | } | |
64 | work_io_service_.reset(); | |
65 | } | |
66 | } | |
67 | ||
68 | void resolver_service_base::fork_service( | |
69 | boost::asio::io_service::fork_event fork_ev) | |
70 | { | |
71 | if (work_thread_.get()) | |
72 | { | |
73 | if (fork_ev == boost::asio::io_service::fork_prepare) | |
74 | { | |
75 | work_io_service_->stop(); | |
76 | work_thread_->join(); | |
77 | } | |
78 | else | |
79 | { | |
80 | work_io_service_->reset(); | |
81 | work_thread_.reset(new boost::asio::detail::thread( | |
82 | work_io_service_runner(*work_io_service_))); | |
83 | } | |
84 | } | |
85 | } | |
86 | ||
87 | void resolver_service_base::construct( | |
88 | resolver_service_base::implementation_type& impl) | |
89 | { | |
90 | impl.reset(static_cast<void*>(0), socket_ops::noop_deleter()); | |
91 | } | |
92 | ||
93 | void resolver_service_base::destroy( | |
94 | resolver_service_base::implementation_type& impl) | |
95 | { | |
96 | BOOST_ASIO_HANDLER_OPERATION(("resolver", &impl, "cancel")); | |
97 | ||
98 | impl.reset(); | |
99 | } | |
100 | ||
101 | void resolver_service_base::cancel( | |
102 | resolver_service_base::implementation_type& impl) | |
103 | { | |
104 | BOOST_ASIO_HANDLER_OPERATION(("resolver", &impl, "cancel")); | |
105 | ||
106 | impl.reset(static_cast<void*>(0), socket_ops::noop_deleter()); | |
107 | } | |
108 | ||
109 | void resolver_service_base::start_resolve_op(operation* op) | |
110 | { | |
111 | start_work_thread(); | |
112 | io_service_impl_.work_started(); | |
113 | work_io_service_impl_.post_immediate_completion(op, false); | |
114 | } | |
115 | ||
116 | void resolver_service_base::start_work_thread() | |
117 | { | |
118 | boost::asio::detail::mutex::scoped_lock lock(mutex_); | |
119 | if (!work_thread_.get()) | |
120 | { | |
121 | work_thread_.reset(new boost::asio::detail::thread( | |
122 | work_io_service_runner(*work_io_service_))); | |
123 | } | |
124 | } | |
125 | ||
126 | } // namespace detail | |
127 | } // namespace asio | |
128 | } // namespace boost | |
129 | ||
130 | #include <boost/asio/detail/pop_options.hpp> | |
131 | ||
132 | #endif // BOOST_ASIO_DETAIL_IMPL_RESOLVER_SERVICE_BASE_IPP |