1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// UNSUPPORTED: libcpp-has-no-threads 11 12// <atomic> 13 14// struct atomic_flag 15 16// atomic_flag() = ATOMIC_FLAG_INIT; 17 18#include <atomic> 19#include <cassert> 20 21int main() 22{ 23 std::atomic_flag f = ATOMIC_FLAG_INIT; 24 assert(f.test_and_set() == 0); 25} 26