text: /////////////////////////////////////////////////////////////////////////////////////////////
  // Copyright 2017 Intel Corporation
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  /////////////////////////////////////////////////////////////////////////////////////////////
  #ifndef CPUTTIMERLINUX_H
  #define CPUTTIMERLINUX_H
  
  #include "CPUT.h"
  #include "CPUTTimer.h"
  
  // Simple QueryPerformanceCounter()-based timer class
  //-----------------------------------------------------------------------------
  class CPUTTimerLinux : CPUTTimer
  {
  public:
      CPUTTimerLinux();
      virtual void   StartTimer();
      virtual double StopTimer();
      virtual double GetTotalTime();
      virtual double GetElapsedTime();
      virtual void   ResetTimer();
  
  private:
      timespec  timeDifference(timespec startTime, timespec endTime); 
      bool      mbCounting;
      timespec  res;
      clockid_t clockType;
      timespec  startTime;
      timespec  lastMeasured;
  };
  
  
  #endif // CPUTTIMERLINUX_H