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use more restrictive conditions for clock_gettime()

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This commit is contained in:
Yann Collet 2018-01-16 10:21:37 -08:00
parent b077a99347
commit 7dba09af47
1 changed files with 8 additions and 1 deletions
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9
programs/util.h
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@ -141,6 +141,7 @@ extern "C" {
* Time functions
******************************************/
#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)
@ -165,7 +166,9 @@ extern "C" {
}
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(); }
@ -189,7 +192,9 @@ extern "C" {
}
return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom);
}
#elif (PLATFORM_POSIX_VERSION >= 200112L)
#elif (PLATFORM_POSIX_VERSION >= 200112L) && (defined __UCLIBC__ || ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) || __GLIBC__ > 2))
#include <time.h>
typedef struct timespec UTIL_time_t;
UTIL_STATIC UTIL_time_t UTIL_getTime(void)
@ -227,7 +232,9 @@ extern "C" {
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 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; }