X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_rwlock_timedwrlock.c;h=d77706e6bc208f77ff8e886fe41b600af954e198;hb=85050ac5a2677a8ebf2722e93b5c037ec675c036;hp=aa2fd199ad0977cd7e55c183a86fea27f853dae2;hpb=50304f2eefb4c79ceaf4605203f3825a35d831c0;p=musl

diff --git a/src/thread/pthread_rwlock_timedwrlock.c b/src/thread/pthread_rwlock_timedwrlock.c
index aa2fd199..d77706e6 100644
--- a/src/thread/pthread_rwlock_timedwrlock.c
+++ b/src/thread/pthread_rwlock_timedwrlock.c
@@ -1,16 +1,25 @@
 #include "pthread_impl.h"
 
-int pthread_rwlock_timedwrlock(pthread_rwlock_t *rw, const struct timespec *at)
+int __pthread_rwlock_timedwrlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at)
 {
 	int r, t;
-	while ((r=pthread_rwlock_trywrlock(rw))==EBUSY) {
+	
+	r = pthread_rwlock_trywrlock(rw);
+	if (r != EBUSY) return r;
+	
+	int spins = 100;
+	while (spins-- && rw->_rw_lock && !rw->_rw_waiters) a_spin();
+
+	while ((r=__pthread_rwlock_trywrlock(rw))==EBUSY) {
 		if (!(r=rw->_rw_lock)) 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, 0);
+		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_timedwrlock, pthread_rwlock_timedwrlock);