execution: PASS
main: attempt read lock
main: acquired read lock
main: create thread1
thread: attempt pthread_rwlock_trywrlock()
thread: correctly got EBUSY
main: unlock read lock
main: attempt pthread_rwlock_trywrlock()
main: acquired write lock
main: create thread2
thread: attempt pthread_rwlock_trywrlock()
thread: correctly got EBUSY
main: unlock write lock
Test PASSED