#include "pthread_impl.h"
-int pthread_rwlock_timedrdlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at)
+int __pthread_rwlock_timedrdlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at)
{
int r, t;
- while ((r=pthread_rwlock_tryrdlock(rw))==EBUSY) {
+
+ r = pthread_rwlock_tryrdlock(rw);
+ if (r != EBUSY) return r;
+
+ int spins = 100;
+ while (spins-- && rw->_rw_lock && !rw->_rw_waiters) a_spin();
+
+ while ((r=__pthread_rwlock_tryrdlock(rw))==EBUSY) {
if (!(r=rw->_rw_lock) || (r&0x7fffffff)!=0x7fffffff) continue;
t = r | 0x80000000;
a_inc(&rw->_rw_waiters);
a_cas(&rw->_rw_lock, r, t);
- r = __timedwait(&rw->_rw_lock, t, CLOCK_REALTIME, at, 0, 0, rw->_rw_shared^128);
+ r = __timedwait(&rw->_rw_lock, t, CLOCK_REALTIME, at, rw->_rw_shared^128);
a_dec(&rw->_rw_waiters);
if (r && r != EINTR) return r;
}
return r;
}
+
+weak_alias(__pthread_rwlock_timedrdlock, pthread_rwlock_timedrdlock);