forked from mirror/openmw-tes3mp
Add osgDB::ObjectCache to the repository to work around it not being available in OSG 3.2
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9 years ago
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commit
d3fa8a8602
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include "objectcache.hpp"
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#if OSG_VERSION_LESS_THAN(3,4,0)
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#include <osgDB/ObjectCache>
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using namespace osgDB;
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////////////////////////////////////////////////////////////////////////////////////////////
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//
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// ObjectCache
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//
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ObjectCache::ObjectCache():
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osg::Referenced(true)
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{
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// OSG_NOTICE<<"Constructed ObjectCache"<<std::endl;
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}
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ObjectCache::~ObjectCache()
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{
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// OSG_NOTICE<<"Destructed ObjectCache"<<std::endl;
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}
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void ObjectCache::addObjectCache(ObjectCache* objectCache)
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{
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// don't allow a cache to be added to itself.
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if (objectCache==this) return;
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// lock both ObjectCache to prevent their contents from being modified by other threads while we merge.
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock1(_objectCacheMutex);
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock2(objectCache->_objectCacheMutex);
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// OSG_NOTICE<<"Inserting objects to main ObjectCache "<<objectCache->_objectCache.size()<<std::endl;
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_objectCache.insert(objectCache->_objectCache.begin(), objectCache->_objectCache.end());
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}
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void ObjectCache::addEntryToObjectCache(const std::string& filename, osg::Object* object, double timestamp)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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_objectCache[filename]=ObjectTimeStampPair(object,timestamp);
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}
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osg::Object* ObjectCache::getFromObjectCache(const std::string& fileName)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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ObjectCacheMap::iterator itr = _objectCache.find(fileName);
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if (itr!=_objectCache.end()) return itr->second.first.get();
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else return 0;
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}
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osg::ref_ptr<osg::Object> ObjectCache::getRefFromObjectCache(const std::string& fileName)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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ObjectCacheMap::iterator itr = _objectCache.find(fileName);
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if (itr!=_objectCache.end())
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{
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// OSG_NOTICE<<"Found "<<fileName<<" in ObjectCache "<<this<<std::endl;
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return itr->second.first;
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}
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else return 0;
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}
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void ObjectCache::updateTimeStampOfObjectsInCacheWithExternalReferences(double referenceTime)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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// look for objects with external references and update their time stamp.
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for(ObjectCacheMap::iterator itr=_objectCache.begin();
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itr!=_objectCache.end();
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++itr)
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{
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// if ref count is greater the 1 the object has an external reference.
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if (itr->second.first->referenceCount()>1)
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{
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// so update it time stamp.
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itr->second.second = referenceTime;
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}
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}
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}
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void ObjectCache::removeExpiredObjectsInCache(double expiryTime)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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// Remove expired entries from object cache
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ObjectCacheMap::iterator oitr = _objectCache.begin();
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while(oitr != _objectCache.end())
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{
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if (oitr->second.second<=expiryTime)
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{
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_objectCache.erase(oitr++);
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}
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else
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{
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++oitr;
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}
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}
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}
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void ObjectCache::removeFromObjectCache(const std::string& fileName)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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ObjectCacheMap::iterator itr = _objectCache.find(fileName);
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if (itr!=_objectCache.end()) _objectCache.erase(itr);
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}
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void ObjectCache::clear()
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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_objectCache.clear();
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}
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void ObjectCache::releaseGLObjects(osg::State* state)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_objectCacheMutex);
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for(ObjectCacheMap::iterator itr = _objectCache.begin();
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itr != _objectCache.end();
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++itr)
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{
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osg::Object* object = itr->second.first.get();
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object->releaseGLObjects(state);
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}
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}
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#endif
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@ -0,0 +1,92 @@
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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// Wrapper for osgDB/ObjectCache. Works around ObjectCache not being available in old OSG 3.2.
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// Use "#include objectcache.hpp" in place of "#include <osgDB/ObjectCache".
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#ifndef OSGDB_OBJECTCACHE_WRAPPER
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#define OSGDB_OBJECTCACHE_WRAPPER 1
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#include <osg/Version>
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#if OSG_VERSION_GREATER_OR_EQUAL(3,4,0)
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#include <osgDB/ObjectCache>
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#else
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#include <osg/Node>
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#include <osgDB/ReaderWriter>
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#include <osgDB/DatabaseRevisions>
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#include <map>
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namespace osgDB {
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class /*OSGDB_EXPORT*/ ObjectCache : public osg::Referenced
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{
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public:
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ObjectCache();
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/** For each object in the cache which has an reference count greater than 1
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* (and therefore referenced by elsewhere in the application) set the time stamp
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* for that object in the cache to specified time.
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* This would typically be called once per frame by applications which are doing database paging,
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* and need to prune objects that are no longer required.
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* The time used should be taken from the FrameStamp::getReferenceTime().*/
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void updateTimeStampOfObjectsInCacheWithExternalReferences(double referenceTime);
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/** Removed object in the cache which have a time stamp at or before the specified expiry time.
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* This would typically be called once per frame by applications which are doing database paging,
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* and need to prune objects that are no longer required, and called after the a called
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* after the call to updateTimeStampOfObjectsInCacheWithExternalReferences(expirtyTime).*/
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void removeExpiredObjectsInCache(double expiryTime);
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/** Remove all objects in the cache regardless of having external references or expiry times.*/
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void clear();
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/** Add contents of specified ObjectCache to this object cache.*/
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void addObjectCache(ObjectCache* object);
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/** Add a filename,object,timestamp triple to the Registry::ObjectCache.*/
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void addEntryToObjectCache(const std::string& filename, osg::Object* object, double timestamp = 0.0);
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/** Remove Object from cache.*/
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void removeFromObjectCache(const std::string& fileName);
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/** Get an Object from the object cache*/
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osg::Object* getFromObjectCache(const std::string& fileName);
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/** Get an ref_ptr<Object> from the object cache*/
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osg::ref_ptr<osg::Object> getRefFromObjectCache(const std::string& fileName);
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/** call rleaseGLObjects on all objects attached to the object cache.*/
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void releaseGLObjects(osg::State* state);
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protected:
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virtual ~ObjectCache();
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typedef std::pair<osg::ref_ptr<osg::Object>, double > ObjectTimeStampPair;
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typedef std::map<std::string, ObjectTimeStampPair > ObjectCacheMap;
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ObjectCacheMap _objectCache;
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OpenThreads::Mutex _objectCacheMutex;
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};
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}
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#endif
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#endif
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