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

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  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. #ifndef BOOST_ASIO_DETAIL_IMPL_RESOLVER_SERVICE_BASE_IPP
  11. #define BOOST_ASIO_DETAIL_IMPL_RESOLVER_SERVICE_BASE_IPP
  12. #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  13. # pragma once
  14. #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  15. #include <boost/asio/detail/config.hpp>
  16. #include <boost/asio/detail/resolver_service_base.hpp>
  17. #include <boost/asio/detail/push_options.hpp>
  18. namespace boost {
  19. namespace asio {
  20. namespace detail {
  21. class resolver_service_base::work_io_service_runner
  22. {
  23. public:
  24. work_io_service_runner(boost::asio::io_service& io_service)
  25. : io_service_(io_service) {}
  26. void operator()() { io_service_.run(); }
  27. private:
  28. boost::asio::io_service& io_service_;
  29. };
  30. resolver_service_base::resolver_service_base(
  31. boost::asio::io_service& io_service)
  32. : io_service_impl_(boost::asio::use_service<io_service_impl>(io_service)),
  33. work_io_service_(new boost::asio::io_service),
  34. work_io_service_impl_(boost::asio::use_service<
  35. io_service_impl>(*work_io_service_)),
  36. work_(new boost::asio::io_service::work(*work_io_service_)),
  37. work_thread_(0)
  38. {
  39. }
  40. resolver_service_base::~resolver_service_base()
  41. {
  42. shutdown_service();
  43. }
  44. void resolver_service_base::shutdown_service()
  45. {
  46. work_.reset();
  47. if (work_io_service_.get())
  48. {
  49. work_io_service_->stop();
  50. if (work_thread_.get())
  51. {
  52. work_thread_->join();
  53. work_thread_.reset();
  54. }
  55. work_io_service_.reset();
  56. }
  57. }
  58. void resolver_service_base::fork_service(
  59. boost::asio::io_service::fork_event fork_ev)
  60. {
  61. if (work_thread_.get())
  62. {
  63. if (fork_ev == boost::asio::io_service::fork_prepare)
  64. {
  65. work_io_service_->stop();
  66. work_thread_->join();
  67. }
  68. else
  69. {
  70. work_io_service_->reset();
  71. work_thread_.reset(new boost::asio::detail::thread(
  72. work_io_service_runner(*work_io_service_)));
  73. }
  74. }
  75. }
  76. void resolver_service_base::construct(
  77. resolver_service_base::implementation_type& impl)
  78. {
  79. impl.reset(static_cast<void*>(0), socket_ops::noop_deleter());
  80. }
  81. void resolver_service_base::destroy(
  82. resolver_service_base::implementation_type& impl)
  83. {
  84. BOOST_ASIO_HANDLER_OPERATION(("resolver", &impl, "cancel"));
  85. impl.reset();
  86. }
  87. void resolver_service_base::cancel(
  88. resolver_service_base::implementation_type& impl)
  89. {
  90. BOOST_ASIO_HANDLER_OPERATION(("resolver", &impl, "cancel"));
  91. impl.reset(static_cast<void*>(0), socket_ops::noop_deleter());
  92. }
  93. void resolver_service_base::start_resolve_op(operation* op)
  94. {
  95. start_work_thread();
  96. io_service_impl_.work_started();
  97. work_io_service_impl_.post_immediate_completion(op);
  98. }
  99. void resolver_service_base::start_work_thread()
  100. {
  101. boost::asio::detail::mutex::scoped_lock lock(mutex_);
  102. if (!work_thread_.get())
  103. {
  104. work_thread_.reset(new boost::asio::detail::thread(
  105. work_io_service_runner(*work_io_service_)));
  106. }
  107. }
  108. } // namespace detail
  109. } // namespace asio
  110. } // namespace boost
  111. #include <boost/asio/detail/pop_options.hpp>
  112. #endif // BOOST_ASIO_DETAIL_IMPL_RESOLVER_SERVICE_BASE_IPP