kc3-lang/angle/util/linux/LinuxTimer.cpp

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• Hash : fe2f3d63
  Author :
  Date : 2015-05-05T17:37:39
  

  Add a basic support for Linux for utils/
  
  * Timer and path utils are done.
  * Window only implements initialize and setVisible
  
  BUG=angleproject:892
  
  Change-Id: I3f49b68ef9ec5be324b25e211199bac2953ae11e
  Reviewed-on: https://chromium-review.googlesource.com/269520
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Corentin Wallez <cwallez@chromium.org>
  

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• util/linux/LinuxTimer.cpp

• //
  // 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.
  //
  
  // LinuxTimer.cpp: Implementation of a high precision timer class on Linux
  
  #include "linux/LinuxTimer.h"
  
  LinuxTimer::LinuxTimer()
      : mRunning(false)
  {
  }
  
  void LinuxTimer::start()
  {
      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &mStartTime);
      mRunning = true;
  }
  
  void LinuxTimer::stop()
  {
      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &mStopTime);
      mRunning = false;
  }
  
  double LinuxTimer::getElapsedTime() const
  {
      struct timespec endTime;
      if (mRunning)
      {
          clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &endTime);
      }
      else
      {
          endTime = mStopTime;
      }
  
      return endTime.tv_sec + (1.0 / 1000000000) * endTime.tv_nsec;
  }
  
  Timer *CreateTimer()
  {
      return new LinuxTimer();
  }
  

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