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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QFUTURESYNCHRONIZER_H
#define QFUTURESYNCHRONIZER_H
#include <QtCore/qfuture.h>
#ifndef QT_NO_QFUTURE
QT_BEGIN_NAMESPACE
template <typename T>
class QFutureSynchronizer
{
Q_DISABLE_COPY(QFutureSynchronizer)
public:
QFutureSynchronizer() : m_cancelOnWait(false) { }
explicit QFutureSynchronizer(const QFuture<T> &future)
: m_cancelOnWait(false)
{ addFuture(future); }
~QFutureSynchronizer() { waitForFinished(); }
void setFuture(const QFuture<T> &future)
{
waitForFinished();
m_futures.clear();
addFuture(future);
}
void addFuture(const QFuture<T> &future)
{
m_futures.append(future);
}
void waitForFinished()
{
if (m_cancelOnWait) {
for (int i = 0; i < m_futures.count(); ++i) {
m_futures[i].cancel();
}
}
for (int i = 0; i < m_futures.count(); ++i) {
m_futures[i].waitForFinished();
}
}
void clearFutures()
{
m_futures.clear();
}
QList<QFuture<T> > futures() const
{
return m_futures;
}
void setCancelOnWait(bool enabled)
{
m_cancelOnWait = enabled;
}
bool cancelOnWait() const
{
return m_cancelOnWait;
}
protected:
QList<QFuture<T> > m_futures;
bool m_cancelOnWait;
};
QT_END_NAMESPACE
#endif // QT_NO_QFUTURE
#endif // QFUTURESYNCHRONIZER_H
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