// Version:    <1.0>

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////////////////////////////////////////////////////////////////////////////////////////////////////

#ifndef __TIMING_H__

#define __TIMING_H__

#include <mach/mach_time.h>

#include <unistd.h>

static inline uint64_t

GetCurrentTime()

{

    return mach_absolute_time();

}

static inline double 

SubtractTime( uint64_t uiEndTime, uint64_t uiStartTime )

{    

    static double s_dConversion = 0.0;

    uint64_t uiDifference = uiEndTime - uiStartTime;

    if( 0 == s_dConversion )

    {

        mach_timebase_info_data_t kTimebase;

        kern_return_t kError = mach_timebase_info( &kTimebase );

        if( kError == 0  )

            s_dConversion = 1e-9 * (double) kTimebase.numer / (double) kTimebase.denom;

    }

    return s_dConversion * (double) uiDifference; 

}

#endif