Timer.h

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#ifndef TIMER_H
#define TIMER_H
#pragma once

#ifdef _WIN32
        #include <windows.h>
#else
        #include <time.h>
        #include <sys/time.h>
#endif

// ***********************************************************************************

namespace Tracking{

class Timer
{
private:
#ifdef WIN32
        LONGLONG m_StartTicks;          // QueryPerformance - Ticks at application start
        LONGLONG m_EndTicks;            // QueryPerformance - Ticks when calling Now()
        LONGLONG m_Frequency;           // QueryPerformance - Fequency
        double fNow;
#else   
        struct timespec AppStart, act, old;
#endif
        double m_fAppTime;                      // Time since application started
        double m_fTime;                         // Time between two Update calls


public:
        Timer(void);
        ~Timer(void);
        
        void    Reset();
        double  Update();
        
        double  GetFrameTime(){ return m_fTime;}
        double  GetApplicationTime(){ return m_fAppTime;}
        
};

}

#endif