_Tthr_rwlock_unlock
[PJT_RWLOCK_UNLOCK] = {DUAL_ENTRY(_Tthr_rwlock_unlock)},
int _Tthr_rwlock_unlock(pthread_rwlock_t *);
__weak_reference(_Tthr_rwlock_unlock, pthread_rwlock_unlock);
__weak_reference(_Tthr_rwlock_unlock, _pthread_rwlock_unlock);