kc3-lang/angle/util/osx/OSXTimer.h

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• Hash : 479918de
  Author :
  Date : 2018-10-22T11:53:51
  

  Get absolute time from timers
  
  Independent of start()/stop()/getElapsedTime() functionality,
  getAbsoluteTime() is added to return the time regardless of whether the
  timer is running.
  
  Bug: angleproject:2908
  Change-Id: I056aeb6eddfba8757a139934c1cf68e00e860de6
  Reviewed-on: https://chromium-review.googlesource.com/c/1296952
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• util/osx/OSXTimer.h

• //
  // Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // OSXTimer.h: Definition of a high precision timer class on OSX
  
  #ifndef UTIL_OSX_TIMER_H_
  #define UTIL_OSX_TIMER_H_
  
  #include <stdint.h>
  #include <time.h>
  
  #include "Timer.h"
  
  class OSXTimer : public Timer
  {
    public:
      OSXTimer();
  
      void start() override;
      void stop() override;
      double getElapsedTime() const override;
  
      double getAbsoluteTime() override;
  
    private:
      double getSecondCoeff();
  
      bool mRunning;
      uint64_t mStartTime;
      uint64_t mStopTime;
      double mSecondCoeff;
  };
  
  #endif // UTIL_OSX_TIMER_H_
  

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