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Annotation of hatari/src/timer.c, revision 1.1

1.1     ! root        1: /*
        !             2:   Hatari
        !             3: 
        !             4:   Debug Timer functions
        !             5: */
        !             6: 
        !             7: #include "main.h"
        !             8: 
        !             9: #define LARGE_INTEGER long long  /* ???? */
        !            10: #define LONGLONG long long       /* ???? */
        !            11: 
        !            12: #define QueryPerformanceFrequency(x)  /* FIXME: What the !$*? is this? */
        !            13: #define QueryPerformanceCounter(x)    /* Dito */
        !            14: 
        !            15: 
        !            16: LARGE_INTEGER StartCount,EndCount,Frequency;
        !            17: 
        !            18: //-----------------------------------------------------------------------
        !            19: /*
        !            20:   Initialise debug timer
        !            21: */
        !            22: void Timer_Init(void)
        !            23: {
        !            24: #ifdef FIND_PERFORMANCE
        !            25:   // Find frequency to calculate 'milli-second' results
        !            26:   QueryPerformanceFrequency(&Frequency);
        !            27: #endif
        !            28: }
        !            29: 
        !            30: //-----------------------------------------------------------------------
        !            31: /*
        !            32:   Start timer
        !            33: */
        !            34: void Timer_Start()
        !            35: {
        !            36:   // Start timer
        !            37:   QueryPerformanceCounter(&StartCount);
        !            38: }
        !            39: 
        !            40: //-----------------------------------------------------------------------
        !            41: /*
        !            42:   Stop timer, return as 'milli-second' count(float)
        !            43: */
        !            44: float Timer_Stop()
        !            45: {
        !            46:   LONGLONG a,b;
        !            47: 
        !            48:   // End timer
        !            49:   QueryPerformanceCounter(&EndCount);
        !            50: 
        !            51:   // Find time and frequency
        !            52:   a = EndCount /*.QuadPart*/ - StartCount /*.QuadPart*/;  /* FIXME */
        !            53:   b = Frequency /*.QuadPart*/ ;
        !            54: 
        !            55:   return( ((float)a/(float)b) * 1000.0f );  /* as 'ms' */
        !            56: }

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