| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // UNSUPPORTED: libcpp-has-no-threads |
| |
| // <atomic> |
| |
| // struct atomic_flag |
| |
| // atomic_flag() = default; |
| |
| #include <atomic> |
| #include <new> |
| #include <cassert> |
| |
| int main() |
| { |
| std::atomic_flag f; |
| f.clear(); |
| assert(f.test_and_set() == 0); |
| { |
| typedef std::atomic_flag A; |
| _ALIGNAS_TYPE(A) char storage[sizeof(A)] = {1}; |
| A& zero = *new (storage) A(); |
| assert(!zero.test_and_set()); |
| zero.~A(); |
| } |
| } |