23   pthread_rwlock_t rwlock;  in main()  local
30   r = pthread_rwlock_init(&rwlock, NULL); assert(r == 0);  in main()
32   r = pthread_rwlock_wrlock(&rwlock); assert(r == 0);  in main()
33   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
35   r = pthread_rwlock_trywrlock(&rwlock); assert(r == 0);  in main()
36   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
39   r = pthread_rwlock_timedwrlock(&rwlock, &abs_timeout); assert(r == 0);  in main()
40   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
43   r = pthread_rwlock_rdlock(&rwlock); assert(r == 0);  in main()
44   r = pthread_rwlock_rdlock(&rwlock); assert(r == 0);  in main()
45   r = pthread_rwlock_rdlock(&rwlock); assert(r == 0);  in main()
46   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
47   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
48   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
50   r = pthread_rwlock_tryrdlock(&rwlock); assert(r == 0);  in main()
51   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
54   r = pthread_rwlock_timedrdlock(&rwlock, &abs_timeout); assert(r == 0);  in main()
55   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
58   r = pthread_rwlock_wrlock(&rwlock); assert(r == 0);  in main()
59   r = pthread_rwlock_wrlock(&rwlock); assert(r != 0);  in main()
60   r = pthread_rwlock_unlock(&rwlock); assert(r == 0);  in main()
61   r = pthread_rwlock_destroy(&rwlock); assert(r == 0);  in main()