92 lines
3.8 KiB
C++
92 lines
3.8 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
|
|
*
|
|
* This library is open source and may be redistributed and/or modified under
|
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
|
* (at your option) any later version. The full license is in LICENSE file
|
|
* included with this distribution, and on the openscenegraph.org website.
|
|
*
|
|
* 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
|
|
* OpenSceneGraph Public License for more details.
|
|
*/
|
|
|
|
#ifndef OSGDB_OBJECTCACHE
|
|
#define OSGDB_OBJECTCACHE 1
|
|
|
|
#include <osg/Node>
|
|
|
|
#include <osgDB/ReaderWriter>
|
|
#include <osgDB/DatabaseRevisions>
|
|
|
|
#include <map>
|
|
|
|
namespace osgDB {
|
|
|
|
class OSGDB_EXPORT ObjectCache : public osg::Referenced
|
|
{
|
|
public:
|
|
|
|
ObjectCache();
|
|
|
|
/** For each object in the cache which has an reference count greater than 1
|
|
* (and therefore referenced by elsewhere in the application) set the time stamp
|
|
* for that object in the cache to specified time.
|
|
* This would typically be called once per frame by applications which are doing database paging,
|
|
* and need to prune objects that are no longer required.
|
|
* The time used should be taken from the FrameStamp::getReferenceTime().*/
|
|
void updateTimeStampOfObjectsInCacheWithExternalReferences(double referenceTime);
|
|
|
|
/** Removed object in the cache which have a time stamp at or before the specified expiry time.
|
|
* This would typically be called once per frame by applications which are doing database paging,
|
|
* and need to prune objects that are no longer required, and called after the a called
|
|
* after the call to updateTimeStampOfObjectsInCacheWithExternalReferences(expirtyTime).*/
|
|
void removeExpiredObjectsInCache(double expiryTime);
|
|
|
|
/** Remove all objects in the cache regardless of having external references or expiry times.*/
|
|
void clear();
|
|
|
|
/** Add contents of specified ObjectCache to this object cache.*/
|
|
void addObjectCache(ObjectCache* object);
|
|
|
|
/** Add a filename,object,timestamp triple to the Registry::ObjectCache.*/
|
|
void addEntryToObjectCache(const std::string& filename, osg::Object* object, double timestamp = 0.0, const Options *options = NULL);
|
|
|
|
/** Remove Object from cache.*/
|
|
void removeFromObjectCache(const std::string& fileName, const Options *options = NULL);
|
|
|
|
/** Deprecated, the getFromObjectCache() returns a C pointer that is not thread safe when using database paging, please use the thread safe getRefFromObjectCache() method instead. */
|
|
osg::Object* getFromObjectCache(const std::string& fileName, const Options *options = NULL);
|
|
|
|
/** Get a thread safe ref_ptr<Object> from the object cache*/
|
|
osg::ref_ptr<osg::Object> getRefFromObjectCache(const std::string& fileName, const Options *options = NULL);
|
|
|
|
/** call rleaseGLObjects on all objects attached to the object cache.*/
|
|
void releaseGLObjects(osg::State* state);
|
|
|
|
protected:
|
|
|
|
virtual ~ObjectCache();
|
|
|
|
typedef std::pair<std::string, osg::ref_ptr<const osgDB::Options> > FileNameOptionsPair;
|
|
|
|
struct ClassComp
|
|
{
|
|
bool operator() (const ObjectCache::FileNameOptionsPair& lhs, const ObjectCache::FileNameOptionsPair& rhs) const;
|
|
};
|
|
|
|
|
|
typedef std::pair<osg::ref_ptr<osg::Object>, double > ObjectTimeStampPair;
|
|
typedef std::map<FileNameOptionsPair, ObjectTimeStampPair, ClassComp> ObjectCacheMap;
|
|
|
|
ObjectCacheMap::iterator find(const std::string& fileName, const osgDB::Options* options);
|
|
|
|
ObjectCacheMap _objectCache;
|
|
OpenThreads::Mutex _objectCacheMutex;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|