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c11: Implement os_time_get_nano with timespec_get(&ts, TIME_MONOTONIC)

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Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23733>
This commit is contained in:
Yonggang Luo 2023-02-14 02:49:56 +08:00 • committed by Marge Bot
parent 45bd24708a
commit 8e452e385b
1 changed files with 5 additions and 32 deletions
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37
src/util/os_time.c
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@ -35,6 +35,8 @@
#include "os_time.h"
#include "detect_os.h"
#include "c11/time.h"
#include "util/u_atomic.h"
#if DETECT_OS_UNIX
@ -53,38 +55,9 @@
int64_t
os_time_get_nano(void)
{
#if DETECT_OS_LINUX || DETECT_OS_BSD
struct timespec tv;
clock_gettime(CLOCK_MONOTONIC, &tv);
return tv.tv_nsec + tv.tv_sec*INT64_C(1000000000);
#elif DETECT_OS_UNIX
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_usec*INT64_C(1000) + tv.tv_sec*INT64_C(1000000000);
#elif DETECT_OS_WINDOWS
LARGE_INTEGER frequency;
LARGE_INTEGER counter;
int64_t secs, nanosecs;
QueryPerformanceFrequency(&frequency);
QueryPerformanceCounter(&counter);
/* Compute seconds and nanoseconds parts separately to
* reduce severity of precision loss.
*/
secs = counter.QuadPart / frequency.QuadPart;
nanosecs = (counter.QuadPart % frequency.QuadPart) * INT64_C(1000000000)
/ frequency.QuadPart;
return secs*INT64_C(1000000000) + nanosecs;
#else
#error Unsupported OS
#endif
struct timespec ts;
timespec_get(&ts, TIME_MONOTONIC);
return ts.tv_nsec + ts.tv_sec*INT64_C(1000000000);
}