+++ /dev/null
-/* compare CPUTimeRead() vs CFAbsoluteTimeGetCurrent() */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "cputime.h"
-#include <CoreFoundation/CoreFoundation.h>
-
-#define WAIT_TIME_SEC 1.0
-
-int main()
-{
- CPUTime cputimeStart, cputimeEnd;
- CFAbsoluteTime start;
-
- printf("Resolution on this machine: %f nanoseconds\n",
- CPUTimeDeltaUs(0ULL, 1ULL) * 1000.0);
-
- start = CFAbsoluteTimeGetCurrent();
- cputimeStart = CPUTimeRead();
- while((CFAbsoluteTimeGetCurrent() - start) < WAIT_TIME_SEC) {
- ;
- }
- cputimeEnd = CPUTimeRead();
-
- printf("Waited %f sec; elapsed CPUTime %f s\n",
- WAIT_TIME_SEC, CPUTimeDeltaSec(cputimeStart, cputimeEnd));
- printf("cputimeStart %08X:%08X cputimeEnd %08X:%08X\n",
- (unsigned)(cputimeStart >> 32),
- (unsigned)(cputimeStart & 0xffffffffULL),
- (unsigned)(cputimeEnd >> 32),
- (unsigned)(cputimeEnd & 0xffffffffULL));
- printf("cputime raw delta %lu\n",
- (unsigned long)(cputimeEnd - cputimeStart));
-
- return 0;
-}