1 #include "pthread_impl.h" 2 __pthread_rwlock_trywrlock(pthread_rwlock_t * rw)3int __pthread_rwlock_trywrlock(pthread_rwlock_t *rw) 4 { 5 if (a_cas(&rw->_rw_lock, 0, 0x7fffffff)) return EBUSY; 6 return 0; 7 } 8 9 weak_alias(__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock); 10