23     bool locked = false;  member
25     ~TestMutex() { assert(!locked); }  in ~TestMutex()
27     void lock() { assert(!locked); locked = true; }  in lock()
28     bool try_lock() { if (locked) return false; locked = true; return true; }  in try_lock()
29     void unlock() { assert(locked); locked = false; }  in unlock()
37     bool locked = false;  member
41     ~TestMutexThrows() { assert(!locked); }  in ~TestMutexThrows()
44         assert(!locked);  in lock()
48         locked = true;  in lock()
52         if (locked) return false;  in try_lock()
57     void unlock() { assert(locked); locked = false; }  in unlock()
75             assert(m1.locked);  in main()
77         assert(!m1.locked);  in main()
84             assert(m1.locked && m2.locked);  in main()
86         assert(!m1.locked && !m2.locked);  in main()
93             assert(m1.locked && m2.locked && m3.locked);  in main()
95         assert(!m1.locked && !m2.locked && !m3.locked);  in main()
107         assert(!m1.locked);  in main()
118         assert(!m1.locked && !m2.locked);  in main()
129         assert(!m1.locked && !m2.locked && !m3.locked);  in main()