summaryrefslogtreecommitdiff
path: root/src/thread/pthread_rwlock_timedwrlock.c
blob: aa2fd199ad0977cd7e55c183a86fea27f853dae2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
#include "pthread_impl.h"

int pthread_rwlock_timedwrlock(pthread_rwlock_t *rw, const struct timespec *at)
{
	int r, t;
	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);
		a_dec(&rw->_rw_waiters);
		if (r && r != EINTR) return r;
	}
	return r;
}