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52066eae | 1 | // { dg-do run { target c++11 } } |
ba0cde8b | 2 | // { dg-require-atomic-cmpxchg-word "" } |
3808dfec | 3 | |
a945c346 | 4 | // Copyright (C) 2009-2024 Free Software Foundation, Inc. |
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5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING3. If not see | |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
afd88205 | 21 | #include <atomic> |
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22 | #include <testsuite_hooks.h> |
23 | ||
24 | int main() | |
25 | { | |
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26 | std::atomic_flag f = ATOMIC_FLAG_INIT; |
27 | ||
e784f980 JW |
28 | f.clear(); // set to false |
29 | VERIFY( false == f.test_and_set() ); // return true | |
30 | VERIFY( true == f.test_and_set() ); // return true | |
31 | f.clear(); // set to false | |
3808dfec | 32 | VERIFY( false == f.test_and_set() ); // return previous false, set to true |
3808dfec | 33 | } |