sleep_tos.c

#include <stdio.h>
#include <time.h>

#define clocksrc CLOCK_REALTIME
int main() {
    struct timespec ts;
    clock_gettime(clocksrc, &ts);
    printf("Starting at %9ld.%09ld\n", (long)ts.tv_sec, (long)ts.tv_nsec);
    ts.tv_nsec = 0;
    ts.tv_sec += 1;
    printf("Deadline is %9ld.%09ld\n", (long)ts.tv_sec, (long)ts.tv_nsec);
    while ( clock_nanosleep(clocksrc, TIMER_ABSTIME, &ts, &ts) != 0)
        /* NOTHING */ ;

    clock_gettime(clocksrc, &ts);
    printf("Returned at %9ld.%09ld\n", (long)ts.tv_sec, (long)ts.tv_nsec);
    return 0;
}