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
23namespace boost {
24namespace asio {
25namespace detail {
26
27class resolver_service_base::work_io_service_runner
28{
29public:
30 work_io_service_runner(boost::asio::io_service& io_service)
31 : io_service_(io_service) {}
32 void operator()() { io_service_.run(); }
33private:
34 boost::asio::io_service& io_service_;
35};
36
37resolver_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
48resolver_service_base::~resolver_service_base()
49{
50 shutdown_service();
51}
52
53void 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
68void 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
87void 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
93void 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
101void 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
109void 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
116void 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

source code of boost/boost/asio/detail/impl/resolver_service_base.ipp