ceph/src/boost/boost/asio/detail/winrt_timer_scheduler.hpp

   1 //
   2 // detail/winrt_timer_scheduler.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2019 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_WINRT_TIMER_SCHEDULER_HPP
  12 #define BOOST_ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP
  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
  20 #if defined(BOOST_ASIO_WINDOWS_RUNTIME)
  21
  22 #include <cstddef>
  23 #include <boost/asio/detail/event.hpp>
  24 #include <boost/asio/detail/limits.hpp>
  25 #include <boost/asio/detail/mutex.hpp>
  26 #include <boost/asio/detail/op_queue.hpp>
  27 #include <boost/asio/detail/thread.hpp>
  28 #include <boost/asio/detail/timer_queue_base.hpp>
  29 #include <boost/asio/detail/timer_queue_set.hpp>
  30 #include <boost/asio/detail/wait_op.hpp>
  31 #include <boost/asio/execution_context.hpp>
  32
  33 #if defined(BOOST_ASIO_HAS_IOCP)
  34 # include <boost/asio/detail/win_iocp_io_context.hpp>
  35 #else // defined(BOOST_ASIO_HAS_IOCP)
  36 # include <boost/asio/detail/scheduler.hpp>
  37 #endif // defined(BOOST_ASIO_HAS_IOCP)
  38
  39 #if defined(BOOST_ASIO_HAS_IOCP)
  40 # include <boost/asio/detail/thread.hpp>
  41 #endif // defined(BOOST_ASIO_HAS_IOCP)
  42
  43 #include <boost/asio/detail/push_options.hpp>
  44
  45 namespace boost {
  46 namespace asio {
  47 namespace detail {
  48
  49 class winrt_timer_scheduler
  50   : public execution_context_service_base<winrt_timer_scheduler>
  51 {
  52 public:
  53   // Constructor.
  54   BOOST_ASIO_DECL winrt_timer_scheduler(execution_context& context);
  55
  56   // Destructor.
  57   BOOST_ASIO_DECL ~winrt_timer_scheduler();
  58
  59   // Destroy all user-defined handler objects owned by the service.
  60   BOOST_ASIO_DECL void shutdown();
  61
  62   // Recreate internal descriptors following a fork.
  63   BOOST_ASIO_DECL void notify_fork(execution_context::fork_event fork_ev);
  64
  65   // Initialise the task. No effect as this class uses its own thread.
  66   BOOST_ASIO_DECL void init_task();
  67
  68   // Add a new timer queue to the reactor.
  69   template <typename Time_Traits>
  70   void add_timer_queue(timer_queue<Time_Traits>& queue);
  71
  72   // Remove a timer queue from the reactor.
  73   template <typename Time_Traits>
  74   void remove_timer_queue(timer_queue<Time_Traits>& queue);
  75
  76   // Schedule a new operation in the given timer queue to expire at the
  77   // specified absolute time.
  78   template <typename Time_Traits>
  79   void schedule_timer(timer_queue<Time_Traits>& queue,
  80       const typename Time_Traits::time_type& time,
  81       typename timer_queue<Time_Traits>::per_timer_data& timer, wait_op* op);
  82
  83   // Cancel the timer operations associated with the given token. Returns the
  84   // number of operations that have been posted or dispatched.
  85   template <typename Time_Traits>
  86   std::size_t cancel_timer(timer_queue<Time_Traits>& queue,
  87       typename timer_queue<Time_Traits>::per_timer_data& timer,
  88       std::size_t max_cancelled = (std::numeric_limits<std::size_t>::max)());
  89
  90   // Move the timer operations associated with the given timer.
  91   template <typename Time_Traits>
  92   void move_timer(timer_queue<Time_Traits>& queue,
  93       typename timer_queue<Time_Traits>::per_timer_data& to,
  94       typename timer_queue<Time_Traits>::per_timer_data& from);
  95
  96 private:
  97   // Run the select loop in the thread.
  98   BOOST_ASIO_DECL void run_thread();
  99
 100   // Entry point for the select loop thread.
 101   BOOST_ASIO_DECL static void call_run_thread(winrt_timer_scheduler* reactor);
 102
 103   // Helper function to add a new timer queue.
 104   BOOST_ASIO_DECL void do_add_timer_queue(timer_queue_base& queue);
 105
 106   // Helper function to remove a timer queue.
 107   BOOST_ASIO_DECL void do_remove_timer_queue(timer_queue_base& queue);
 108
 109   // The scheduler implementation used to post completions.
 110 #if defined(BOOST_ASIO_HAS_IOCP)
 111   typedef class win_iocp_io_context scheduler_impl;
 112 #else
 113   typedef class scheduler scheduler_impl;
 114 #endif
 115   scheduler_impl& scheduler_;
 116
 117   // Mutex used to protect internal variables.
 118   boost::asio::detail::mutex mutex_;
 119
 120   // Event used to wake up background thread.
 121   boost::asio::detail::event event_;
 122
 123   // The timer queues.
 124   timer_queue_set timer_queues_;
 125
 126   // The background thread that is waiting for timers to expire.
 127   boost::asio::detail::thread* thread_;
 128
 129   // Does the background thread need to stop.
 130   bool stop_thread_;
 131
 132   // Whether the service has been shut down.
 133   bool shutdown_;
 134 };
 135
 136 } // namespace detail
 137 } // namespace asio
 138 } // namespace boost
 139
 140 #include <boost/asio/detail/pop_options.hpp>
 141
 142 #include <boost/asio/detail/impl/winrt_timer_scheduler.hpp>
 143 #if defined(BOOST_ASIO_HEADER_ONLY)
 144 # include <boost/asio/detail/impl/winrt_timer_scheduler.ipp>
 145 #endif // defined(BOOST_ASIO_HEADER_ONLY)
 146
 147 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 148
 149 #endif // BOOST_ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP