/* High resolution monotonic clock, falling back to the realtime clock
if the target does not support such a clock.
Arguments:
secs - OUTPUT, seconds
fracsecs - OUTPUT, fractional seconds, units given by tk argument
tk - OUTPUT, clock resolution [counts/sec]
If the target supports a monotonic clock, the OUTPUT arguments
represent a monotonically incrementing clock starting from some
unspecified time in the past.
If a monotonic clock is not available, falls back to the realtime
clock which is not monotonic.
Return value: 0 for success, -1 for error. In case of error, errno
is set.
*/
static int
gf_gettime_mono (time_t * secs, long * fracsecs, long * tck)
{
int err;
#ifdef HAVE_CLOCK_GETTIME
struct timespec ts;
*tck = 1000000000;
err = clock_gettime (GF_CLOCK_MONOTONIC, &ts);
*secs = ts.tv_sec;
*fracsecs = ts.tv_nsec;
return err;
#else
#if SUPPORTS_WEAKREF && defined(HAVE_CLOCK_GETTIME_LIBRT)
if (weak_gettime)
{
struct timespec ts;
*tck = 1000000000;
err = weak_gettime (GF_CLOCK_MONOTONIC, &ts);
*secs = ts.tv_sec;
*fracsecs = ts.tv_nsec;
return err;
}
#endif
*tck = 1000000;
err = gf_gettime (secs, fracsecs);
return err;
#endif
}
/* High resolution monotonic clock, falling back to the realtime clock
if the target does not support such a clock.
Arguments:
secs - OUTPUT, seconds
nanosecs - OUTPUT, nanoseconds
tk - OUTPUT, clock resolution [counts/sec]
If the target supports a monotonic clock, the OUTPUT arguments
represent a monotonically incrementing clock starting from some
unspecified time in the past.
If a monotonic clock is not available, falls back to the realtime
clock which is not monotonic.
Return value: 0 for success, -1 for error. In case of error, errno
is set.
*/
static int
gf_gettime_mono (time_t * secs, long * nanosecs, long * tck)
{
int err;
#ifdef HAVE_CLOCK_GETTIME
struct timespec ts;
*tck = 1000000000;
err = clock_gettime (GF_CLOCK_MONOTONIC, &ts);
*secs = ts.tv_sec;
*nanosecs = ts.tv_nsec;
return err;
#else
#if defined(HAVE_CLOCK_GETTIME_LIBRT) && SUPPORTS_WEAK && GTHREAD_USE_WEAK
if (weak_gettime)
{
struct timespec ts;
*tck = 1000000000;
err = weak_gettime (GF_CLOCK_MONOTONIC, &ts);
*secs = ts.tv_sec;
*nanosecs = ts.tv_nsec;
return err;
}
#endif
*tck = 1000000;
err = gf_gettime (secs, nanosecs);
*nanosecs *= 1000;
return err;
#endif
}
int main() {
if (!clock_gettime)
return 0;
struct timespec ts;
return weak_gettime(CLOCK_MONOTONIC, &ts);
}
