2 #include "pthread_impl.h"
4 static void cleanup(void *p)
9 int sem_timedwait(sem_t *restrict sem, const struct timespec *restrict at)
13 if (!sem_trywait(sem)) return 0;
16 while (spins-- && sem->__val[0] <= 0 && !sem->__val[1]) a_spin();
18 while (sem_trywait(sem)) {
21 a_cas(sem->__val, 0, -1);
22 pthread_cleanup_push(cleanup, (void *)(sem->__val+1));
23 r = __timedwait_cp(sem->__val, -1, CLOCK_REALTIME, at, sem->__val[2]);
24 pthread_cleanup_pop(1);
25 if (r && r != EINTR) {