1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <atomic> 10 11 // struct atomic_flag 12 13 // atomic_flag() = default; 14 15 #include <atomic> 16 #include <new> 17 #include <cassert> 18 19 #include "test_macros.h" 20 main(int,char **)21int main(int, char**) 22 { 23 std::atomic_flag f; 24 f.clear(); 25 assert(f.test_and_set() == 0); 26 { 27 typedef std::atomic_flag A; 28 TEST_ALIGNAS_TYPE(A) char storage[sizeof(A)] = {1}; 29 A& zero = *new (storage) A(); 30 assert(!zero.test_and_set()); 31 zero.~A(); 32 } 33 34 return 0; 35 } 36