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#include "pthread_impl.h"
int pthread_rwlock_wrlock(pthread_rwlock_t *rw)
{
int nr;
while (pthread_rwlock_trywrlock(rw)==EAGAIN) {
if ((nr=rw->_rw_readers))
__wait(&rw->_rw_readers, &rw->_rw_waiters, nr, 0);
else
__wait(&rw->_rw_wrlock, &rw->_rw_waiters, 1, 0);
}
return 0;
}
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