UC3M

Once initialized condition variable can be set various parameters related to the condition. One of them is the clock on which the invoking thread sleeps:

 int pthread_condattr_getclock(const pthread_condattr_t *restrict attr,
		     clockid_t *restrict clock_id);
int pthread_condattr_setclock(pthread_condattr_t *attr,
		    clockid_t clock_id);