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Annotation of hatari/src/timer.c, revision 1.1.1.2

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: 
1.1.1.2 ! root       18: 
        !            19: /*-----------------------------------------------------------------------*/
1.1       root       20: /*
                     21:   Initialise debug timer
                     22: */
                     23: void Timer_Init(void)
                     24: {
                     25: #ifdef FIND_PERFORMANCE
1.1.1.2 ! root       26:   /* Find frequency to calculate 'milli-second' results */
1.1       root       27:   QueryPerformanceFrequency(&Frequency);
                     28: #endif
                     29: }
                     30: 
1.1.1.2 ! root       31: 
        !            32: /*-----------------------------------------------------------------------*/
1.1       root       33: /*
                     34:   Start timer
                     35: */
                     36: void Timer_Start()
                     37: {
1.1.1.2 ! root       38:   /* Start timer */
1.1       root       39:   QueryPerformanceCounter(&StartCount);
                     40: }
                     41: 
1.1.1.2 ! root       42: 
        !            43: /*-----------------------------------------------------------------------*/
1.1       root       44: /*
                     45:   Stop timer, return as 'milli-second' count(float)
                     46: */
                     47: float Timer_Stop()
                     48: {
                     49:   LONGLONG a,b;
                     50: 
1.1.1.2 ! root       51:   /* End timer */
1.1       root       52:   QueryPerformanceCounter(&EndCount);
                     53: 
1.1.1.2 ! root       54:   /* Find time and frequency */
1.1       root       55:   a = EndCount /*.QuadPart*/ - StartCount /*.QuadPart*/;  /* FIXME */
                     56:   b = Frequency /*.QuadPart*/ ;
                     57: 
                     58:   return( ((float)a/(float)b) * 1000.0f );  /* as 'ms' */
                     59: }

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