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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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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