1// { dg-options "-x c -shared-libgcc -lstdc++" }
2
3// Copyright (C) 2009 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20#include <cassert>
21#include <stdatomic.h>
22
23// libstdc++/40826
24// libstdc++/40654
25int main()
26{
27  atomic_flag f = ATOMIC_FLAG_INIT;
28
29  atomic_flag_clear(&f); // set to false
30  assert( false == atomic_flag_test_and_set(&f) ); // return previous false, set to true
31  assert( true == atomic_flag_test_and_set(&f) ); // return true
32
33  return 0;
34}
35