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

   1 //
   2 // detail/winrt_timer_scheduler.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 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/io_context.hpp>
  32
  33 #if defined(BOOST_ASIO_HAS_IOCP)
  34 # include <boost/asio/detail/thread.hpp>
  35 #endif // defined(BOOST_ASIO_HAS_IOCP)
  36
  37 #include <boost/asio/detail/push_options.hpp>
  38
  39 namespace boost {
  40 namespace asio {
  41 namespace detail {
  42
  43 class winrt_timer_scheduler
  44   : public boost::asio::detail::service_base<winrt_timer_scheduler>
  45 {
  46 public:
  47   // Constructor.
  48   BOOST_ASIO_DECL winrt_timer_scheduler(boost::asio::io_context& io_context);
  49
  50   // Destructor.
  51   BOOST_ASIO_DECL ~winrt_timer_scheduler();
  52
  53   // Destroy all user-defined handler objects owned by the service.
  54   BOOST_ASIO_DECL void shutdown();
  55
  56   // Recreate internal descriptors following a fork.
  57   BOOST_ASIO_DECL void notify_fork(
  58       boost::asio::io_context::fork_event fork_ev);
  59
  60   // Initialise the task. No effect as this class uses its own thread.
  61   BOOST_ASIO_DECL void init_task();
  62
  63   // Add a new timer queue to the reactor.
  64   template <typename Time_Traits>
  65   void add_timer_queue(timer_queue<Time_Traits>& queue);
  66
  67   // Remove a timer queue from the reactor.
  68   template <typename Time_Traits>
  69   void remove_timer_queue(timer_queue<Time_Traits>& queue);
  70
  71   // Schedule a new operation in the given timer queue to expire at the
  72   // specified absolute time.
  73   template <typename Time_Traits>
  74   void schedule_timer(timer_queue<Time_Traits>& queue,
  75       const typename Time_Traits::time_type& time,
  76       typename timer_queue<Time_Traits>::per_timer_data& timer, wait_op* op);
  77
  78   // Cancel the timer operations associated with the given token. Returns the
  79   // number of operations that have been posted or dispatched.
  80   template <typename Time_Traits>
  81   std::size_t cancel_timer(timer_queue<Time_Traits>& queue,
  82       typename timer_queue<Time_Traits>::per_timer_data& timer,
  83       std::size_t max_cancelled = (std::numeric_limits<std::size_t>::max)());
  84
  85   // Move the timer operations associated with the given timer.
  86   template <typename Time_Traits>
  87   void move_timer(timer_queue<Time_Traits>& queue,
  88       typename timer_queue<Time_Traits>::per_timer_data& to,
  89       typename timer_queue<Time_Traits>::per_timer_data& from);
  90
  91 private:
  92   // Run the select loop in the thread.
  93   BOOST_ASIO_DECL void run_thread();
  94
  95   // Entry point for the select loop thread.
  96   BOOST_ASIO_DECL static void call_run_thread(winrt_timer_scheduler* reactor);
  97
  98   // Helper function to add a new timer queue.
  99   BOOST_ASIO_DECL void do_add_timer_queue(timer_queue_base& queue);
 100
 101   // Helper function to remove a timer queue.
 102   BOOST_ASIO_DECL void do_remove_timer_queue(timer_queue_base& queue);
 103
 104   // The io_context implementation used to post completions.
 105   io_context_impl& io_context_;
 106
 107   // Mutex used to protect internal variables.
 108   boost::asio::detail::mutex mutex_;
 109
 110   // Event used to wake up background thread.
 111   boost::asio::detail::event event_;
 112
 113   // The timer queues.
 114   timer_queue_set timer_queues_;
 115
 116   // The background thread that is waiting for timers to expire.
 117   boost::asio::detail::thread* thread_;
 118
 119   // Does the background thread need to stop.
 120   bool stop_thread_;
 121
 122   // Whether the service has been shut down.
 123   bool shutdown_;
 124 };
 125
 126 } // namespace detail
 127 } // namespace asio
 128 } // namespace boost
 129
 130 #include <boost/asio/detail/pop_options.hpp>
 131
 132 #include <boost/asio/detail/impl/winrt_timer_scheduler.hpp>
 133 #if defined(BOOST_ASIO_HEADER_ONLY)
 134 # include <boost/asio/detail/impl/winrt_timer_scheduler.ipp>
 135 #endif // defined(BOOST_ASIO_HEADER_ONLY)
 136
 137 #endif // defined(BOOST_ASIO_WINDOWS_RUNTIME)
 138
 139 #endif // BOOST_ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP