| // Copyright (C) 2015-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-do compile { target c++11 } } |
| // { dg-require-atomic-builtins "" } |
| // { dg-require-cstdint "" } |
| |
| #include <atomic> |
| #include <cstdint> |
| |
| using std::int32_t; |
| using std::int64_t; |
| |
| // libstdc++/62259 |
| |
| struct twoints { |
| int32_t a; |
| int32_t b; |
| }; |
| |
| static_assert( alignof(std::atomic<twoints>) >= alignof(int64_t), |
| "std::atomic not suitably aligned" ); |
| |
| // libstdc++/65147 |
| |
| struct power_of_two_obj { |
| char c [8]; |
| }; |
| |
| std::atomic<power_of_two_obj> obj1; |
| |
| static_assert( __alignof__(obj1) >= alignof(int64_t), |
| "std::atomic not suitably aligned" ); |
| |
| struct container_struct { |
| char c[1]; |
| std::atomic<power_of_two_obj> ao; |
| }; |
| |
| container_struct obj2; |
| |
| static_assert( __alignof__(obj2.ao) >= alignof(int64_t), |
| "std::atomic not suitably aligned" ); |