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 // bool atomic_flag_test(const volatile atomic_flag*); 14 // bool atomic_flag_test(const atomic_flag*); 15 16 #include <atomic> 17 #include <cassert> 18 19 #include "test_macros.h" 20 main(int,char **)21int main(int, char**) 22 { 23 { 24 std::atomic_flag f; 25 f.clear(); 26 assert(std::atomic_flag_test(&f) == 0); 27 assert(f.test_and_set() == 0); 28 assert(std::atomic_flag_test(&f) == 1); 29 } 30 { 31 volatile std::atomic_flag f; 32 f.clear(); 33 assert(std::atomic_flag_test(&f) == 0); 34 assert(f.test_and_set() == 0); 35 assert(std::atomic_flag_test(&f) == 1); 36 } 37 38 return 0; 39 } 40