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
28int 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

source code of libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared.atomic/atomic_exchange_explicit.pass.cpp