1 | // |
2 | // detail/impl/resolver_service_base.ipp |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
4 | // |
5 | // Copyright (c) 2003-2015 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>(ios&: io_service)), |
40 | work_io_service_(new boost::asio::io_service), |
41 | work_io_service_impl_(boost::asio::use_service< |
42 | io_service_impl>(ios&: *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(p: 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(p: static_cast<void*>(0), d: 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(p: static_cast<void*>(0), d: 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, is_continuation: 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(p: 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 |
133 | |