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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2013 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth 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 of the License, or
 * (at your option) 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
#ifndef OSGEARTH_MEMCACHE_H
#define OSGEARTH_MEMCACHE_H 1

#include <osgEarth/Cache>

namespace osgEarth
{
    /**
     * An in-memory cache.
     * Each bin in this cache has its own locking mechanism for thread-safety. Each
     * bin also maintains an LRU list for maintaining the size cap.
     */
    class OSGEARTH_EXPORT MemCache : public Cache
    {
    public:
        MemCache( unsigned maxBinSize =16 );
        META_Object( osgEarth, MemCache );

        /** dtor */
        virtual ~MemCache() { }

    public: // Cache interface

        virtual CacheBin* addBin( const std::string& binID );

        virtual CacheBin* getOrCreateDefaultBin();
    
    private:
        MemCache( const MemCache& rhs, const osg::CopyOp& op =osg::CopyOp::DEEP_COPY_ALL ) { }

        unsigned _maxBinSize;
    };

} // namespace osgEarth

#endif // OSGEARTH_MEMCACHE_H