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 // UNSUPPORTED: libcpp-has-no-threads
10 
11 // <atomic>
12 
13 // struct atomic_flag
14 
15 // void atomic_flag_clear(volatile atomic_flag*);
16 // void atomic_flag_clear(atomic_flag*);
17 
18 #include <atomic>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 
main(int,char **)23 int main(int, char**)
24 {
25     {
26         std::atomic_flag f;
27         f.clear();
28         f.test_and_set();
29         atomic_flag_clear(&f);
30         assert(f.test_and_set() == 0);
31     }
32     {
33         volatile std::atomic_flag f;
34         f.clear();
35         f.test_and_set();
36         atomic_flag_clear(&f);
37         assert(f.test_and_set() == 0);
38     }
39 
40   return 0;
41 }
42