1*4684ddb6SLionel Sambuc //===----------------------------------------------------------------------===// 2*4684ddb6SLionel Sambuc // 3*4684ddb6SLionel Sambuc // The LLVM Compiler Infrastructure 4*4684ddb6SLionel Sambuc // 5*4684ddb6SLionel Sambuc // This file is dual licensed under the MIT and the University of Illinois Open 6*4684ddb6SLionel Sambuc // Source Licenses. See LICENSE.TXT for details. 7*4684ddb6SLionel Sambuc // 8*4684ddb6SLionel Sambuc //===----------------------------------------------------------------------===// 9*4684ddb6SLionel Sambuc 10*4684ddb6SLionel Sambuc // <atomic> 11*4684ddb6SLionel Sambuc 12*4684ddb6SLionel Sambuc // struct atomic_flag 13*4684ddb6SLionel Sambuc 14*4684ddb6SLionel Sambuc // atomic_flag() = default; 15*4684ddb6SLionel Sambuc 16*4684ddb6SLionel Sambuc #include <atomic> 17*4684ddb6SLionel Sambuc #include <new> 18*4684ddb6SLionel Sambuc #include <cassert> 19*4684ddb6SLionel Sambuc main()20*4684ddb6SLionel Sambucint main() 21*4684ddb6SLionel Sambuc { 22*4684ddb6SLionel Sambuc std::atomic_flag f; 23*4684ddb6SLionel Sambuc 24*4684ddb6SLionel Sambuc { 25*4684ddb6SLionel Sambuc typedef std::atomic_flag A; 26*4684ddb6SLionel Sambuc _ALIGNAS_TYPE(A) char storage[sizeof(A)] = {1}; 27*4684ddb6SLionel Sambuc A& zero = *new (storage) A(); 28*4684ddb6SLionel Sambuc assert(!zero.test_and_set()); 29*4684ddb6SLionel Sambuc zero.~A(); 30*4684ddb6SLionel Sambuc } 31*4684ddb6SLionel Sambuc } 32