xbmc/threads/Timer.h

   1 /*
   2  *  Copyright (C) 2012-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include "Event.h"
  12 #include "Thread.h"
  13
  14 #include <chrono>
  15 #include <functional>
  16
  17 class ITimerCallback
  18 {
  19 public:
  20   virtual ~ITimerCallback() = default;
  21
  22   virtual void OnTimeout() = 0;
  23 };
  24
  25 class CTimer : protected CThread
  26 {
  27 public:
  28   explicit CTimer(ITimerCallback *callback);
  29   explicit CTimer(std::function<void()> const& callback);
  30   ~CTimer() override;
  31
  32   bool Start(std::chrono::milliseconds timeout, bool interval = false);
  33   bool Stop(bool wait = false);
  34   bool Restart();
  35   void RestartAsync(std::chrono::milliseconds timeout);
  36
  37   bool IsRunning() const { return CThread::IsRunning(); }
  38
  39   float GetElapsedSeconds() const;
  40   float GetElapsedMilliseconds() const;
  41
  42 protected:
  43   void Process() override;
  44
  45 private:
  46   std::function<void()> m_callback;
  47   std::chrono::milliseconds m_timeout;
  48   bool m_interval;
  49   std::chrono::time_point<std::chrono::steady_clock> m_endTime;
  50   CEvent m_eventTimeout;
  51 };