path: root/src/resources/resource.h

/*
 *  The Mana Client
 *  Copyright (C) 2004-2009  The Mana World Development Team
 *  Copyright (C) 2009-2012  The Mana Developers
 *
 *  This file is part of The Mana Client.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef RESOURCE_H
#define RESOURCE_H

#include <ctime>
#include <string>

/**
 * A generic reference counted resource object.
 */
class Resource
{
    friend class ResourceManager;

    public:
        enum OrphanPolicy {
            DeleteLater,
            DeleteImmediately
        };

        Resource():
            mRefCount(0)
        {}

        /**
         * Increments the internal reference count.
         */
        void incRef() { ++mRefCount; }

        /**
         * Decrements the reference count. When no references are left, either
         * schedules the object for deletion or deletes it immediately,
         * depending on the \a orphanPolicy.
         */
        void decRef(OrphanPolicy orphanPolicy = DeleteLater);

        /**
         * Return the path identifying this resource.
         */
        const std::string &getIdPath() const
        { return mIdPath; }

    protected:
        virtual ~Resource() {}

    private:
        std::string mIdPath; /**< Path identifying this resource. */
        time_t mTimeStamp;   /**< Time at which the resource was orphaned. */
        unsigned mRefCount;  /**< Reference count. */
};

#endif