int timespec_getres( struct timespec *ts, int base );
(since C23)If ts is non-null and base is supported by timespec_get, modifies *ts to hold the resolution of time provided by timespec_get for base. For each supported base, multiple calls to timespec_getres during the same program execution have identical results.
The value of base if base is supported, zero otherwise.
The POSIX function clock_getres(clock_id, ts) may also be used to populate a timespec with the resolution of time identified by clock_id.
#include <stdio.h>
#include <time.h>
int main(void)
{
char buff[128];
struct timespec ts;
const int res = timespec_getres(&ts, TIME_UTC);
if (res == TIME_UTC) {
struct tm timer;
strftime(buff, sizeof buff, "%D %T", gmtime_r(&ts.tv_sec, &timer));
printf("Time resolution info: %s.%09ld UTC\n", buff, ts.tv_nsec);
} else {
printf("TIME_UTC base is not supported.");
}
}
Possible output:
Time resolution info: 01/01/70 00:00:00.000000001 UTC[edit] See also time in seconds and nanoseconds
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