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86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
#ifndef OPENMW_COMPONENTS_RESOURCE_MANAGER_H
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#define OPENMW_COMPONENTS_RESOURCE_MANAGER_H
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#include <osg/ref_ptr>
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#include "objectcache.hpp"
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namespace VFS
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{
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class Manager;
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}
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namespace osg
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{
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class Stats;
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class State;
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}
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namespace Resource
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{
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class BaseResourceManager
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{
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public:
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virtual ~BaseResourceManager() {}
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virtual void updateCache(double referenceTime) {}
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virtual void clearCache() {}
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virtual void setExpiryDelay(double expiryDelay) {}
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virtual void reportStats(unsigned int frameNumber, osg::Stats* stats) const {}
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virtual void releaseGLObjects(osg::State* state) {}
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};
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/// @brief Base class for managers that require a virtual file system and object cache.
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/// @par This base class implements clearing of the cache, but populating it and what it's used for is up to the individual sub classes.
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template <class KeyType>
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class GenericResourceManager : public BaseResourceManager
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{
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public:
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typedef GenericObjectCache<KeyType> CacheType;
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GenericResourceManager(const VFS::Manager* vfs)
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: mVFS(vfs)
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, mCache(new CacheType)
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, mExpiryDelay(0.0)
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{
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}
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virtual ~GenericResourceManager() {}
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/// Clear cache entries that have not been referenced for longer than expiryDelay.
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void updateCache(double referenceTime) override
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{
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mCache->updateTimeStampOfObjectsInCacheWithExternalReferences(referenceTime);
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mCache->removeExpiredObjectsInCache(referenceTime - mExpiryDelay);
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}
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/// Clear all cache entries.
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void clearCache() override { mCache->clear(); }
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/// How long to keep objects in cache after no longer being referenced.
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void setExpiryDelay (double expiryDelay) override { mExpiryDelay = expiryDelay; }
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float getExpiryDelay() const { return mExpiryDelay; }
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const VFS::Manager* getVFS() const { return mVFS; }
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void reportStats(unsigned int frameNumber, osg::Stats* stats) const override {}
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void releaseGLObjects(osg::State* state) override { mCache->releaseGLObjects(state); }
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protected:
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const VFS::Manager* mVFS;
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osg::ref_ptr<CacheType> mCache;
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double mExpiryDelay;
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};
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class ResourceManager : public GenericResourceManager<std::string>
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{
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public:
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ResourceManager(const VFS::Manager* vfs) : GenericResourceManager<std::string>(vfs) {}
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};
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}
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#endif
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