/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** GNU Lesser General Public License Usage
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** License version 2.1 as published by the Free Software Foundation and
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** file. Please review the following information to ensure the GNU Lesser
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** 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
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** file. Please review the following information to ensure the GNU General
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QWSSIGNALHANDLER_P_H
#define QWSSIGNALHANDLER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of the QLibrary class.  This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qglobal.h>

#ifndef QT_NO_QWS_SIGNALHANDLER

#include <QtCore/qhash.h>
#include <QtCore/qlist.h>
#include <QtCore/qobjectcleanuphandler.h>

QT_BEGIN_NAMESPACE

typedef void (*qt_sighandler_t)(int);

class QLock;
class QWSLock;

class QWSSignalHandlerPrivate;

class Q_GUI_EXPORT QWSSignalHandler
{
public:
    static QWSSignalHandler* instance();

    ~QWSSignalHandler();

#ifndef QT_NO_QWS_MULTIPROCESS
    inline void addLock(QLock *lock) { locks.append(lock); }
    inline void removeLock(QLock *lock) { locks.removeOne(lock); }
    inline void addWSLock(QWSLock *wslock) { wslocks.append(wslock); }
    inline void removeWSLock(QWSLock *wslock) { wslocks.removeOne(wslock); }
#endif
    inline void addObject(QObject *object) { (void)objects.add(object); }

private:
    QWSSignalHandler();

    void clear();

    static void handleSignal(int signal);

    QHash<int, qt_sighandler_t> oldHandlers;
#ifndef QT_NO_QWS_MULTIPROCESS
    QList<QLock *> locks;
    QList<QWSLock *> wslocks;
#endif
    QObjectCleanupHandler objects;

    friend class QWSSignalHandlerPrivate;
};

QT_END_NAMESPACE

#endif // QT_NO_QWS_SIGNALHANDLER

#endif // QWSSIGNALHANDLER_P_H