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// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX26_REMOVED_SHARED_PTR_ATOMICS
10// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
11// UNSUPPORTED: no-threads
12
13// <memory>
14
15// shared_ptr
16
17// template <class T>
18// bool
19// atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v,
20// shared_ptr<T> w, memory_order success,
21// memory_order failure); // Deprecated in C++20, removed in C++26
22
23// UNSUPPORTED: c++03
24
25#include <memory>
26
27#include <atomic>
28#include <cassert>
29
30#include "test_macros.h"
31
32int main(int, char**)
33{
34 {
35 std::shared_ptr<int> p(new int(4));
36 std::shared_ptr<int> v(new int(3));
37 std::shared_ptr<int> w(new int(2));
38 bool b = std::atomic_compare_exchange_strong_explicit(&p, &v, w,
39 std::memory_order_seq_cst,
40 std::memory_order_seq_cst);
41 assert(b == false);
42 assert(*p == 4);
43 assert(*v == 4);
44 assert(*w == 2);
45 }
46 {
47 std::shared_ptr<int> p(new int(4));
48 std::shared_ptr<int> v = p;
49 std::shared_ptr<int> w(new int(2));
50 bool b = std::atomic_compare_exchange_strong_explicit(&p, &v, w,
51 std::memory_order_seq_cst,
52 std::memory_order_seq_cst);
53 assert(b == true);
54 assert(*p == 2);
55 assert(*v == 4);
56 assert(*w == 2);
57 }
58
59 return 0;
60}
61

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