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