| 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // UNSUPPORTED: no-threads |
| 10 | |
| 11 | // <memory> |
| 12 | |
| 13 | // shared_ptr |
| 14 | |
| 15 | // template <class T> |
| 16 | // shared_ptr<T> |
| 17 | // atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r) |
| 18 | |
| 19 | // UNSUPPORTED: c++03 |
| 20 | |
| 21 | #include <memory> |
| 22 | |
| 23 | #include <atomic> |
| 24 | #include <cassert> |
| 25 | |
| 26 | #include "test_macros.h" |
| 27 | |
| 28 | int main(int, char**) |
| 29 | { |
| 30 | { |
| 31 | std::shared_ptr<int> p(new int(4)); |
| 32 | std::shared_ptr<int> r(new int(3)); |
| 33 | r = std::atomic_exchange_explicit(&p, r, std::memory_order_seq_cst); |
| 34 | assert(*p == 3); |
| 35 | assert(*r == 4); |
| 36 | } |
| 37 | |
| 38 | return 0; |
| 39 | } |
| 40 | |