7835b260a9
And ask the user to apply one of the patches we're carrying to their Standard Libraries. Change-Id: I7e6338336dd6468ead24ffff141139c79056922e Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2016 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>
|
|
|
|
typedef void (*fptr)(int);
|
|
typedef std::atomic<fptr> atomicfptr;
|
|
|
|
void testfunction(int) { }
|
|
|
|
void test(volatile atomicfptr &a)
|
|
{
|
|
fptr v = a.load(std::memory_order_acquire);
|
|
while (!a.compare_exchange_strong(v, &testfunction,
|
|
std::memory_order_acq_rel,
|
|
std::memory_order_acquire)) {
|
|
v = a.exchange(&testfunction);
|
|
}
|
|
|
|
a.store(&testfunction, std::memory_order_release);
|
|
}
|
|
|
|
int main(int, char **)
|
|
{
|
|
atomicfptr fptr(testfunction);
|
|
test(fptr);
|
|
return 0;
|
|
}
|