Function clock_gettime

src/misc.c:85–119

#include <mach/mach_time.h>

static int clock_gettime(clockid_t clock_id, struct timespec *tp)
{
    if (clock_id == CLOCK_REALTIME)
    {
        struct timeval t;

        if (gettimeofday(&t, NULL) != 0)
        {
            return -1;
        }

        tp->tv_sec = t.tv_sec;
        tp->tv_nsec = t.tv_usec * 1000;
    }
    else if (clock_id == CLOCK_MONOTONIC)
    {
        static mach_timebase_info_data_t info = { 0, 0 };

        if (info.denom == 0)
        {
            mach_timebase_info(&info);
        }

        uint64_t t = mach_absolute_time() * info.numer / info.denom;
        tp->tv_sec = t / 1000000000;
        tp->tv_nsec = t % 1000000000;
    }
    else
    {
        errno = EINVAL;
        return -1;
    }

    return 0;
}

#endif // !HAVE_CLOCK_GETTIME