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Annotation of hatari/src/timer.c, revision 1.1.1.1

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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