41         TestMutex m1;  in main()  local
43         m1.lock();  in main()
45             LG lg(std::adopt_lock, m1);  in main()
46             assert(m1.locked);  in main()
48         assert(!m1.locked);  in main()
51         TestMutex m1, m2;  in main()  local
53         m1.lock(); m2.lock();  in main()
55             LG lg(std::adopt_lock, m1, m2);  in main()
56             assert(m1.locked && m2.locked);  in main()
58         assert(!m1.locked && !m2.locked);  in main()
61         TestMutex m1, m2, m3;  in main()  local
63         m1.lock(); m2.lock(); m3.lock();  in main()
65             LG lg(std::adopt_lock, m1, m2, m3);  in main()
66             assert(m1.locked && m2.locked && m3.locked);  in main()
68         assert(!m1.locked && !m2.locked && !m3.locked);  in main()