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1 | // Copyright (C) 2017-2024 Free Software Foundation, Inc. | |
2 | // | |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
18 | // { dg-do run { target c++11 } } | |
19 | // { dg-require-atomic-builtins "" } | |
20 | ||
21 | #include <atomic> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | struct NonDefaultConstructible | |
25 | { | |
26 | NonDefaultConstructible(int i) : val(i) { } | |
27 | int val; | |
28 | }; | |
29 | ||
30 | template class std::atomic<NonDefaultConstructible>; | |
31 | ||
32 | void | |
33 | test01() | |
34 | { | |
35 | std::atomic<NonDefaultConstructible> a(1); | |
36 | const auto n1 = a.exchange(2); | |
37 | VERIFY( n1.val == 1 ); | |
38 | const auto n2 = a.load(); | |
39 | VERIFY( n2.val == 2 ); | |
40 | } | |
41 | ||
42 | void | |
43 | test02() | |
44 | { | |
45 | volatile std::atomic<NonDefaultConstructible> a(1); | |
46 | const auto n1 = a.exchange(2); | |
47 | VERIFY( n1.val == 1 ); | |
48 | const auto n2 = a.load(); | |
49 | VERIFY( n2.val == 2 ); | |
50 | } | |
51 | ||
52 | int | |
53 | main() | |
54 | { | |
55 | test01(); | |
56 | test02(); | |
57 | } |