55 std::atomic_int test2(0);  variable
74   assert(test2 == 0);  in f2()
76   while (test2 == 0)  in f2()
79   assert(test2 == 1);  in f2()
80   test2 = 2;  in f2()
95     test2 = 1;  in main()
104       assert(test2 == 1);  in main()
109       assert(test2 == 2);  in main()
111       test2 = 0;  in main()
121       assert(test2 == 0);  in main()
126       assert(test2 == 2);  in main()
128       test2 = 0;  in main()