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+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFUTUREINTERFACE_P_H
+#define QFUTUREINTERFACE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qelapsedtimer.h>
+#include <QtCore/qcoreevent.h>
+#include <QtCore/qlist.h>
+#include <QtCore/qwaitcondition.h>
+#include <QtCore/qrunnable.h>
+
+QT_BEGIN_NAMESPACE
+
+class QFutureCallOutEvent : public QEvent
+{
+public:
+    enum CallOutType {
+        Started,
+        Finished,
+        Canceled,
+        Paused,
+        Resumed,
+        Progress,
+        ProgressRange,
+        ResultsReady
+    };
+
+    QFutureCallOutEvent()
+        : QEvent(QEvent::FutureCallOut), callOutType(CallOutType(0)), index1(-1), index2(-1)
+    { }
+    QFutureCallOutEvent(CallOutType callOutType, int index1 = -1)
+        : QEvent(QEvent::FutureCallOut), callOutType(callOutType), index1(index1), index2(-1)
+    { }
+    QFutureCallOutEvent(CallOutType callOutType, int index1, int index2)
+        : QEvent(QEvent::FutureCallOut), callOutType(callOutType), index1(index1), index2(index2)
+    { }
+
+    QFutureCallOutEvent(CallOutType callOutType, int index1, const QString &text)
+        : QEvent(QEvent::FutureCallOut),
+          callOutType(callOutType),
+          index1(index1),
+          index2(-1),
+          text(text)
+    { }
+
+    CallOutType callOutType;
+    int index1;
+    int index2;
+    QString text;
+
+    QFutureCallOutEvent *clone() const
+    {
+        return new QFutureCallOutEvent(callOutType, index1, index2, text);
+    }
+
+private:
+    QFutureCallOutEvent(CallOutType callOutType,
+                        int index1,
+                        int index2,
+                        const QString &text)
+        : QEvent(QEvent::FutureCallOut),
+          callOutType(callOutType),
+          index1(index1),
+          index2(index2),
+          text(text)
+    { }
+};
+
+class QFutureCallOutInterface
+{
+public:
+    virtual ~QFutureCallOutInterface() {}
+    virtual void postCallOutEvent(const QFutureCallOutEvent &) = 0;
+    virtual void callOutInterfaceDisconnected() = 0;
+};
+
+class QFutureInterfaceBasePrivate
+{
+public:
+    QFutureInterfaceBasePrivate(QFutureInterfaceBase::State initialState);
+
+    QAtomicInt refCount;
+    mutable QMutex m_mutex;
+    QWaitCondition waitCondition;
+    QList<QFutureCallOutInterface *> outputConnections;
+    int m_progressValue;
+    int m_progressMinimum;
+    int m_progressMaximum;
+    QFutureInterfaceBase::State state;
+    QElapsedTimer progressTime;
+    QWaitCondition pausedWaitCondition;
+    int pendingResults;
+    QtConcurrent::ResultStoreBase m_results;
+    bool manualProgress;
+    int m_expectedResultCount;
+    QtConcurrent::internal::ExceptionStore m_exceptionStore;
+    QString m_progressText;
+    QRunnable *runnable;
+
+    // Internal functions that does not change the mutex state.
+    // The mutex must be locked when calling these.
+    int internal_resultCount() const;
+    bool internal_isResultReadyAt(int index) const;
+    bool internal_waitForNextResult();
+    bool internal_updateProgress(int progress, const QString &progressText = QString());
+    void internal_setThrottled(bool enable);
+    void sendCallOut(const QFutureCallOutEvent &callOut);
+    void sendCallOuts(const QFutureCallOutEvent &callOut1, const QFutureCallOutEvent &callOut2);
+    void connectOutputInterface(QFutureCallOutInterface *iface);
+    void disconnectOutputInterface(QFutureCallOutInterface *iface);
+
+    void setState(QFutureInterfaceBase::State state);
+};
+
+QT_END_NAMESPACE
+
+#endif