k3staticdeleter.h

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/*
 * This file is part of the KDE Libraries
 * Copyright (C) 2000 Stephan Kulow <coolo@kde.org>
 *               2001 KDE Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef _KSTATIC_DELETER_H_
#define _KSTATIC_DELETER_H_

#include <kde3support_export.h>

class K3StaticDeleterBase;

namespace K3StaticDeleterHelpers
{
    KDE3SUPPORT_EXPORT void registerStaticDeleter(K3StaticDeleterBase *d);

    KDE3SUPPORT_EXPORT void unregisterStaticDeleter(K3StaticDeleterBase *d);

    KDE3SUPPORT_EXPORT void deleteStaticDeleters();
} // namespace K3StaticDeleterHelpers

class KDE3SUPPORT_EXPORT K3StaticDeleterBase {
public:
    virtual ~K3StaticDeleterBase();
    virtual void destructObject();
};

template<class type> class KDE_DEPRECATED K3StaticDeleter : public K3StaticDeleterBase {
public:
    K3StaticDeleter() { deleteit = 0; globalReference = 0; array = false; }

    KDE_DEPRECATED type *setObject( type *obj, bool isArray = false) {
        deleteit = obj;
        globalReference = 0;
        array = isArray;
        if (obj)
            K3StaticDeleterHelpers::registerStaticDeleter(this);
        else
            K3StaticDeleterHelpers::unregisterStaticDeleter(this);
        return obj;
    }

    type *setObject( type* & globalRef, type *obj, bool isArray = false) {
        globalReference = &globalRef;
        deleteit = obj;
        array = isArray;
        if (obj)
            K3StaticDeleterHelpers::registerStaticDeleter(this);
        else
            K3StaticDeleterHelpers::unregisterStaticDeleter(this);
        globalRef = obj;
        return obj;
    }

    virtual void destructObject() {
        if (globalReference)
           *globalReference = 0;
        if (array)
            delete [] deleteit;
        else
            delete deleteit;
        deleteit = 0;
    }

    virtual ~K3StaticDeleter() {
        K3StaticDeleterHelpers::unregisterStaticDeleter(this);
        destructObject();
    }
private:
    type *deleteit;
    type **globalReference;
    bool array;
};

#endif