1 #include "pthread_impl.h"
3 int pthread_rwlock_timedwrlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at)
7 r = pthread_rwlock_trywrlock(rw);
8 if (r != EBUSY) return r;
11 while (spins-- && rw->_rw_lock && !rw->_rw_waiters) a_spin();
13 while ((r=pthread_rwlock_trywrlock(rw))==EBUSY) {
14 if (!(r=rw->_rw_lock)) continue;
16 a_inc(&rw->_rw_waiters);
17 a_cas(&rw->_rw_lock, r, t);
18 r = __timedwait(&rw->_rw_lock, t, CLOCK_REALTIME, at, rw->_rw_shared^128);
19 a_dec(&rw->_rw_waiters);
20 if (r && r != EINTR) return r;