/Src/Dependencies/Boost/boost/asio/detail/impl/resolver_service_base.ipp

  1//
  2// detail/impl/resolver_service_base.ipp
  3// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  4//
  5// Copyright (c) 2003-2011 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>(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
 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(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(static_cast<void*>(0), 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(static_cast<void*>(0), 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);
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(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