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 // <atomic> 11 12 // struct atomic_flag 13 14 // bool atomic_flag_test_and_set(volatile atomic_flag*); 15 // bool atomic_flag_test_and_set(atomic_flag*); 16 17 #include <atomic> 18 #include <cassert> 19 20 int main() 21 { 22 { 23 std::atomic_flag f; 24 f.clear(); 25 assert(atomic_flag_test_and_set(&f) == 0); 26 assert(f.test_and_set() == 1); 27 } 28 { 29 volatile std::atomic_flag f; 30 f.clear(); 31 assert(atomic_flag_test_and_set(&f) == 0); 32 assert(f.test_and_set() == 1); 33 } 34 } 35
