libqt4-dev 4:4.8.1-0ubuntu4.9 / usr / include / qt4 / Qt / qfuturesynchronizer.h

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QFUTRUESYNCHRONIZER_H
#define QFUTRUESYNCHRONIZER_H

#include <QtCore/qfuture.h>

#ifndef QT_NO_CONCURRENT

QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE

QT_MODULE(Core)

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
QT_END_HEADER

#endif // QT_NO_CONCURRENT

#endif // QFUTRUESYNCHRONIZER_H

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