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diff --git a/src/lib/qtconcurrent/multitask.h b/src/lib/qtconcurrent/multitask.h
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+/**************************************************************************
+**
+** This file is part of the Qt Build Suite
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+**
+** 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.
+**
+**************************************************************************/
+
+#ifndef MULTITASK_H
+#define MULTITASK_H
+
+#include "qtconcurrent_global.h"
+#include "runextensions.h"
+
+#include <QtCore/QObject>
+#include <QtCore/QList>
+#include <QtCore/QEventLoop>
+#include <QtCore/QFutureWatcher>
+#include <QtCore/QtConcurrentRun>
+#include <QtCore/QThreadPool>
+
+#include <QtDebug>
+
+QT_BEGIN_NAMESPACE
+
+namespace QtConcurrent {
+
+class QTCONCURRENT_EXPORT MultiTaskBase : public QObject, public QRunnable
+{
+    Q_OBJECT
+protected slots:
+    virtual void cancelSelf() = 0;
+    virtual void setFinished() = 0;
+    virtual void setProgressRange(int min, int max) = 0;
+    virtual void setProgressValue(int value) = 0;
+    virtual void setProgressText(QString value) = 0;
+};
+
+template <typename Class, typename R>
+class MultiTask : public MultiTaskBase
+{
+public:
+    MultiTask(void (Class::*fn)(QFutureInterface<R> &), const QList<Class *> &objects)
+        : fn(fn),
+        objects(objects)
+    {
+        maxProgress = 100*objects.size();
+    }
+
+    QFuture<R> future()
+    {
+        futureInterface.reportStarted();
+        return futureInterface.future();
+    }
+
+    void run()
+    {
+        QThreadPool::globalInstance()->releaseThread();
+        futureInterface.setProgressRange(0, maxProgress);
+        foreach (Class *object, objects) {
+            QFutureWatcher<R> *watcher = new QFutureWatcher<R>();
+            watchers.insert(object, watcher);
+            finished.insert(watcher, false);
+            connect(watcher, SIGNAL(finished()), this, SLOT(setFinished()));
+            connect(watcher, SIGNAL(progressRangeChanged(int,int)), this, SLOT(setProgressRange(int,int)));
+            connect(watcher, SIGNAL(progressValueChanged(int)), this, SLOT(setProgressValue(int)));
+            connect(watcher, SIGNAL(progressTextChanged(QString)), this, SLOT(setProgressText(QString)));
+            watcher->setFuture(QtConcurrent::run(fn, object));
+        }
+        selfWatcher = new QFutureWatcher<R>();
+        connect(selfWatcher, SIGNAL(canceled()), this, SLOT(cancelSelf()));
+        selfWatcher->setFuture(futureInterface.future());
+        loop = new QEventLoop;
+        loop->exec();
+        futureInterface.reportFinished();
+        QThreadPool::globalInstance()->reserveThread();
+        qDeleteAll(watchers);
+        delete selfWatcher;
+        delete loop;
+    }
+protected:
+    void cancelSelf()
+    {
+        foreach (QFutureWatcher<R> *watcher, watchers)
+            watcher->future().cancel();
+    }
+
+    void setFinished()
+    {
+        updateProgress();
+        QFutureWatcher<R> *watcher = static_cast<QFutureWatcher<R> *>(sender());
+        if (finished.contains(watcher))
+            finished[watcher] = true;
+        bool allFinished = true;
+        foreach (bool isFinished, finished) {
+            if (!isFinished) {
+                allFinished = false;
+                break;
+            }
+        }
+        if (allFinished)
+            loop->quit();
+    }
+
+    void setProgressRange(int min, int max)
+    {
+        Q_UNUSED(min)
+        Q_UNUSED(max)
+        updateProgress();
+    }
+
+    void setProgressValue(int value)
+    {
+        Q_UNUSED(value)
+        updateProgress();
+    }
+
+    void setProgressText(QString value)
+    {
+        Q_UNUSED(value)
+        updateProgressText();
+    }
+private:
+    void updateProgress()
+    {
+        int progressSum = 0;
+        foreach (QFutureWatcher<R> *watcher, watchers) {
+            if (watcher->progressMinimum() == watcher->progressMaximum()) {
+                if (watcher->future().isFinished() && !watcher->future().isCanceled())
+                    progressSum += 100;
+            } else {
+                progressSum += 100*(watcher->progressValue()-watcher->progressMinimum())/(watcher->progressMaximum()-watcher->progressMinimum());
+            }
+        }
+        futureInterface.setProgressValue(progressSum);
+    }
+
+    void updateProgressText()
+    {
+        QString text;
+        foreach (QFutureWatcher<R> *watcher, watchers) {
+            if (!watcher->progressText().isEmpty())
+                text += watcher->progressText() + "\n";
+        }
+        text = text.trimmed();
+        futureInterface.setProgressValueAndText(futureInterface.progressValue(), text);
+    }
+
+    QFutureInterface<R> futureInterface;
+    void (Class::*fn)(QFutureInterface<R> &);
+    QList<Class *> objects;
+
+    QFutureWatcher<R> *selfWatcher;
+    QMap<Class *, QFutureWatcher<R> *> watchers;
+    QMap<QFutureWatcher<R> *, bool> finished;
+    QEventLoop *loop;
+    int maxProgress;
+};
+
+template <typename Class, typename T>
+QFuture<T> run(void (Class::*fn)(QFutureInterface<T> &), const QList<Class *> &objects, int priority = 0)
+{
+    MultiTask<Class, T> *task = new MultiTask<Class, T>(fn, objects);
+    QFuture<T> future = task->future();
+    QThreadPool::globalInstance()->start(task, priority);
+    return future;
+}
+
+} // namespace QtConcurrent
+
+QT_END_NAMESPACE
+
+#endif // MULTITASK_H