48    pthread_rwlock_t rwl2;  in main()  local
186    r= pthread_rwlock_init( &rwl2, NULL ); assert(!r);  in main()
190    r= pthread_rwlock_wrlock( &rwl2 ); assert(!r);  in main()
193    r= pthread_rwlock_unlock( &rwl2 ); assert(!r);  in main()
196    r= pthread_rwlock_unlock( &rwl2 ); assert(!r);  in main()
199    r= pthread_rwlock_init( &rwl2, NULL ); assert(!r);  in main()
202    r= pthread_rwlock_rdlock( &rwl2 ); assert(!r);  in main()
204    r= pthread_rwlock_rdlock( &rwl2 ); assert(!r);  in main()
207    r= pthread_rwlock_unlock( &rwl2 ); assert(!r);  in main()
209    r= pthread_rwlock_unlock( &rwl2 ); assert(!r);  in main()
212    r= pthread_rwlock_unlock( &rwl2 ); assert(!r);  in main()