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replace times() with clock_gettime(CLOCK_MONOTONIC, x)

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This commit is contained in:
Przemyslaw Skibinski
2017-02-20 11:11:50 +01:00
parent 7d93216666
commit 83775d9e05
1 changed files with 7 additions and 9 deletions
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16
programs/util.h
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@ -109,20 +109,18 @@ extern "C" {
/*-****************************************
* Time functions
******************************************/
#if (PLATFORM_POSIX_VERSION >= 1)
#include <unistd.h>
#include <sys/times.h> /* times */
typedef U64 UTIL_time_t;
UTIL_STATIC void UTIL_initTimer(UTIL_time_t* ticksPerSecond) { *ticksPerSecond=sysconf(_SC_CLK_TCK); }
UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { struct tms junk; clock_t newTicks = (clock_t) times(&junk); (void)junk; *x = (UTIL_time_t)newTicks; }
UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / ticksPerSecond; }
UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / ticksPerSecond; }
#elif defined(_WIN32) /* Windows */
#if defined(_WIN32) /* Windows */
typedef LARGE_INTEGER UTIL_time_t;
UTIL_STATIC void UTIL_initTimer(UTIL_time_t* ticksPerSecond) { if (!QueryPerformanceFrequency(ticksPerSecond)) fprintf(stderr, "ERROR: QueryPerformance not present\n"); }
UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { QueryPerformanceCounter(x); }
UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; }
UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; }
#elif (_POSIX_TIMERS > 0) && defined(_POSIX_MONOTONIC_CLOCK) /* defined in <unistd.h> */
typedef struct timespec UTIL_time_t;
UTIL_STATIC void UTIL_initTimer(UTIL_time_t* clockResolution) { clock_getres(CLOCK_MONOTONIC, clockResolution); }
UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { if (clock_gettime(CLOCK_MONOTONIC, x) == -1) { fprintf(stderr, "clock_gettime error"); }; }
UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return (1000000000ULL * (clockEnd.tv_sec - clockStart.tv_sec) + (clockEnd.tv_nsec - clockStart.tv_nsec))/1000ULL; }
UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd.tv_sec - clockStart.tv_sec) + (clockEnd.tv_nsec - clockStart.tv_nsec); }
#else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */
typedef clock_t UTIL_time_t;
UTIL_STATIC void UTIL_initTimer(UTIL_time_t* ticksPerSecond) { *ticksPerSecond=0; }