diff options
Diffstat (limited to 'programs/util.h')
| -rw-r--r-- | programs/util.h | 127 |
1 files changed, 99 insertions, 28 deletions
diff --git a/programs/util.h b/programs/util.h index 5a69c55..1382cab 100644 --- a/programs/util.h +++ b/programs/util.h @@ -140,45 +140,116 @@ 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 */ - 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; } +#if defined(_WIN32) /* Windows */ + typedef LARGE_INTEGER UTIL_time_t; + UTIL_STATIC UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; } + UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) + { + static LARGE_INTEGER ticksPerSecond; + static int init = 0; + if (!init) { + if (!QueryPerformanceFrequency(&ticksPerSecond)) + fprintf(stderr, "ERROR: QueryPerformanceFrequency() failure\n"); + init = 1; + } + return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; + } + UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) + { + static LARGE_INTEGER ticksPerSecond; + static int init = 0; + if (!init) { + if (!QueryPerformanceFrequency(&ticksPerSecond)) + fprintf(stderr, "ERROR: QueryPerformanceFrequency() failure\n"); + init = 1; + } + return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; + } +#elif defined(__APPLE__) && defined(__MACH__) + #include <mach/mach_time.h> + typedef U64 UTIL_time_t; + UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); } + UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) + { + static mach_timebase_info_data_t rate; + static int init = 0; + if (!init) { + mach_timebase_info(&rate); + init = 1; + } + return (((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom))/1000ULL; + } + UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) + { + static mach_timebase_info_data_t rate; + static int init = 0; + if (!init) { + mach_timebase_info(&rate); + init = 1; + } + return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom); + } +#elif (PLATFORM_POSIX_VERSION >= 200112L) + #include <time.h> + typedef struct timespec UTIL_time_t; + UTIL_STATIC UTIL_time_t UTIL_getTime(void) + { + UTIL_time_t now; + if (clock_gettime(CLOCK_MONOTONIC, &now)) + fprintf(stderr, "ERROR: Failed to get time\n"); /* we could also exit() */ + return now; + } + UTIL_STATIC UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end) + { + UTIL_time_t diff; + if (end.tv_nsec < begin.tv_nsec) { + diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec; + diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec; + } else { + diff.tv_sec = end.tv_sec - begin.tv_sec; + diff.tv_nsec = end.tv_nsec - begin.tv_nsec; + } + return diff; + } + UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end) + { + UTIL_time_t const diff = UTIL_getSpanTime(begin, end); + U64 micro = 0; + micro += 1000000ULL * diff.tv_sec; + micro += diff.tv_nsec / 1000ULL; + return micro; + } + UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end) + { + UTIL_time_t const diff = UTIL_getSpanTime(begin, end); + U64 nano = 0; + nano += 1000000000ULL * diff.tv_sec; + nano += diff.tv_nsec; + return nano; + } #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; } - UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { *x = clock(); } - UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { (void)ticksPerSecond; return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } - UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { (void)ticksPerSecond; return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } + typedef clock_t UTIL_time_t; + UTIL_STATIC UTIL_time_t UTIL_getTime(void) { return clock(); } + UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } + UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; } #endif /* returns time span in microseconds */ -UTIL_STATIC U64 UTIL_clockSpanMicro( UTIL_time_t clockStart, UTIL_time_t ticksPerSecond ) +UTIL_STATIC U64 UTIL_clockSpanMicro(UTIL_time_t clockStart) { - UTIL_time_t clockEnd; - UTIL_getTime(&clockEnd); - return UTIL_getSpanTimeMicro(ticksPerSecond, clockStart, clockEnd); + UTIL_time_t const clockEnd = UTIL_getTime(); + return UTIL_getSpanTimeMicro(clockStart, clockEnd); } -UTIL_STATIC void UTIL_waitForNextTick(UTIL_time_t ticksPerSecond) +UTIL_STATIC void UTIL_waitForNextTick(void) { - UTIL_time_t clockStart, clockEnd; - UTIL_getTime(&clockStart); + UTIL_time_t const clockStart = UTIL_getTime(); + UTIL_time_t clockEnd; do { - UTIL_getTime(&clockEnd); - } while (UTIL_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) == 0); + clockEnd = UTIL_getTime(); + } while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0); } |