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// void atomic_flag_clear(volatile atomic_flag*); 17// void atomic_flag_clear(atomic_flag*); 18 19#include <atomic> 20#include <cassert> 21 22int main() 23{ 24 { 25 std::atomic_flag f; 26 f.test_and_set(); 27 atomic_flag_clear(&f); 28 assert(f.test_and_set() == 0); 29 } 30 { 31 volatile std::atomic_flag f; 32 f.test_and_set(); 33 atomic_flag_clear(&f); 34 assert(f.test_and_set() == 0); 35 } 36} 37