14    pthread_mutex_t *mx1, *mx2;  in main()  local
17    mx2 = malloc(120 + sizeof(pthread_mutex_t) - sizeof(pthread_mutex_t));  in main()
20    assert(mx2);  in main()
23    r = pthread_mutex_init( mx2, NULL ); assert(r==0);  in main()
28    r = pthread_mutex_lock( mx2 ); assert(r==0);  in main()
31    r = pthread_mutex_unlock( mx2 ); assert(r==0);  in main()
35    r = pthread_mutex_lock( mx2 ); assert(r==0); /* error */  in main()
39    r = pthread_mutex_unlock( mx2 ); assert(r==0);  in main()
46    pthread_mutex_destroy( mx2 );  in main()
50    r = pthread_mutex_init( mx2, NULL ); assert(r==0);  in main()
52    r = pthread_mutex_lock( mx2 ); assert(r==0);  in main()
56    r = pthread_mutex_unlock( mx2 ); assert(r==0);  in main()
62    r = pthread_mutex_destroy( mx2 );  in main()
65    free( mx2 );  in main()