/*
 * Copyright (C) 2010 University of Szeged. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef CleanupHandler_h
#define CleanupHandler_h

#include <QCoreApplication>
#include <QList>
#include <QObject>
#include <wtf/HashSet.h>
#include <wtf/StdLibExtras.h>

namespace WebKit {

class CleanupHandler : private QObject {
    Q_OBJECT
public:
    static CleanupHandler* instance()
    {
        if (!theInstance)
            theInstance = new CleanupHandler();
        return theInstance;
    }

    void markForCleanup(QObject* object)
    {
        m_objects.append(object);
    }

    void unmark(QObject* object)
    {
        if (m_hasStartedDeleting)
            return;
        m_objects.removeOne(object);
    }

    bool hasStartedDeleting() const { return m_hasStartedDeleting; }

private slots:
    void deleteObjects();

private:
    static void sigTermHandler(int);
    static CleanupHandler* theInstance;

    CleanupHandler();

    QList<QObject*> m_objects;
    bool m_hasStartedDeleting;
};

} // namespace WebKit

#endif // CleanupHandler_h