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Diffstat (limited to 'config.tests/common/atomic64/atomic64.cpp')
-rw-r--r-- | config.tests/common/atomic64/atomic64.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/config.tests/common/atomic64/atomic64.cpp b/config.tests/common/atomic64/atomic64.cpp new file mode 100644 index 0000000000..8dbea96c8b --- /dev/null +++ b/config.tests/common/atomic64/atomic64.cpp @@ -0,0 +1,54 @@ +/**************************************************************************** +** +** Copyright (C) 2015 Intel Corporation. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the FOO module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <atomic> +#include <cstdint> + +void test(volatile std::atomic<std::int64_t> &a) +{ + std::int64_t v = a.load(std::memory_order_acquire); + while (!a.compare_exchange_strong(v, v + 1, + std::memory_order_acq_rel, + std::memory_order_acquire)) { + v = a.exchange(v - 1); + } + + a.store(v + 1, std::memory_order_release); +} + +int main(int, char **) +{ + void *ptr = (void*)0xffffffc0; // any random pointer + test(*reinterpret_cast<std::atomic<std::int64_t> *>(ptr)); + return 0; +} |