VRS - The Virtual Rendering System

version 3.3

resourcemanager.h

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/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2000-2005 Computer Graphics Systems Group at the 
 * Hasso-Plattner-Institute (HPI), Potsdam, Germany.
 *
 * This  library  is  free  software; you can redistribute it and/or  modify it
 * under the terms of the GNU Lesser General Public  License  as  published  by
 * the  Free  Software  Foundation;  either  version 2.1 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 Lesser General Public License for more details. You should have received
 * a copy of the GNU Lesser+ General Public License along with this library; if
 * not, write to the FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA, 02111-1307, USA.
 ******************************************************************************/

// $Id: resourcemanager.h 5612 2006-12-14 13:43:10Z Konstantin_Baumann $
//
// $Log$
// Revision 1.7  2006/02/01 09:59:16  baumann
// locking of resources added
//
// Revision 1.6  2005/06/20 09:58:16  baumann
// GCC 3.4.x fixes
//
// Revision 1.5  2005/05/20 11:37:23  baumann
// new classes GraphicsMemoryManager and MainMemoryManager added
//
// Revision 1.4  2005/05/20 10:43:17  baumann
// typo fixed
//
// Revision 1.3  2005/04/17 08:35:36  baumann
// typo fixed
//
// Revision 1.2  2005/03/14 06:26:03  baumann
// using SO<const RESOURCE_TYPE> instead of SO<RESOURCE_TYPE>
//
// Revision 1.1  2005/03/07 16:42:45  baumann
// initial version of VRS::ResourceManager checked in
//

#ifndef VRS_CONTAINER_RESOURCEMANAGER_H
#define VRS_CONTAINER_RESOURCEMANAGER_H

#include <vrs/sharedobj.h>
#include <list>

namespace VRS {

    template<
        class RESOURCE_TYPE = VRS::SharedObj,
        typename RESOURCE_SIZE_TYPE = unsigned int
    >
    class ResourceManager :
        public VRS::SharedObj
    {
    public:
        VRS_TYPEINFO(ResourceManager, VRS::SharedObj);

        ResourceManager(
            const RESOURCE_SIZE_TYPE maxSize
        );

        void add(
            const SO<const RESOURCE_TYPE> resourceObject,
            const RESOURCE_SIZE_TYPE resourceSize
        );

        bool use(
            const SO<const RESOURCE_TYPE> resourceObject
        );

        bool remove(
            const SO<const RESOURCE_TYPE> resourceObject
        );

        bool contains(
            const SO<const RESOURCE_TYPE> resourceObject
        ) const;

        void lock();
        void unlock();

        bool clear();

        void maxSize(
            const RESOURCE_SIZE_TYPE newMaxSize
        );

        RESOURCE_SIZE_TYPE maxSize() const;

        RESOURCE_SIZE_TYPE usedSize() const;

    private:
        void update();

        typedef std::list<std::pair<SO<const RESOURCE_TYPE>, RESOURCE_SIZE_TYPE> > ResourceUsageList;
        ResourceUsageList m_objects;

        RESOURCE_SIZE_TYPE m_maxSize;
        RESOURCE_SIZE_TYPE m_usedSize;

        unsigned int m_lockCount;
        SO<const RESOURCE_TYPE> m_locked;
                typedef std::vector<SO<const RESOURCE_TYPE> > ResourceRemoveAfterUnlockList;
                ResourceRemoveAfterUnlockList m_removeAfterUnlock;
    }; // class ResourceManager<RESOURCE_TYPE, RESOURCE_SIZE_TYPE>

} // namespace VRS

#include <vrs/container/resourcemanager.tli>

#endif // VRS_CONTAINER_RESOURCEMANAGER_H

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