hkaMultithreadedChunkCache.h
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上传日期:2020-08-09
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文件大小:3k
源码类别:
其他游戏
开发平台:
Visual C++
- /*
- *
- * Confidential Information of Telekinesys Research Limited (t/a Havok). Not for disclosure or distribution without Havok's
- * prior written consent. This software contains code, techniques and know-how which is confidential and proprietary to Havok.
- * Level 2 and Level 3 source code contains trade secrets of Havok. Havok Software (C) Copyright 1999-2009 Telekinesys Research Limited t/a Havok. All Rights Reserved. Use of this software is subject to the terms of an end user license agreement.
- *
- */
- #ifndef HK_MULTITHREADED_CHUNK_CACHE
- #define HK_MULTITHREADED_CHUNK_CACHE
- #include <Common/Base/hkBase.h>
- #include <Animation/Animation/Playback/Cache/Default/hkaDefaultChunkCache.h>
- #include <Common/Base/Thread/CriticalSection/hkCriticalSection.h>
- /// This version of hkaDefaultChunkCache uses critical sections and locking to ensure MT-safety.
- class hkaMultithreadedChunkCache : public hkaDefaultChunkCache
- {
- public:
- /// Constructor.
- hkaMultithreadedChunkCache( struct hkaDefaultChunkCacheCinfo& cinfo );
- /// Destructor.
- ~hkaMultithreadedChunkCache();
- /// Retrieves a read only pointer to a preallocated/cached chunk
- /// Returns HK_NULL if the key is not found in the cache
- virtual const hkUint8* retrieveChunk( hkUint32 key, hkUint32 chunkSize );
- /*
- * Locking support
- */
- /// Locks a specific key ( will never be removed from the cache pool until it is unlocked )
- virtual hkBool lockKeyForRead( hkUint32 key, hkUint32 chunkSize );
- /// Unlocks a specific key
- virtual hkBool unlockKeyForRead( hkUint32 key, hkUint32 chunkSize );
- /// Locks a specific key for writing (calls to retrieve are not allowed)
- virtual hkBool lockKeyForWrite( hkUint32 key, hkUint32 chunkSize );
- /// Unlocks a specific key for writing
- virtual hkBool unlockKeyForWrite( hkUint32 key, hkUint32 chunkSize );
- /// Query if key locked for write (use before calling retrieveChunk)
- virtual hkBool isKeyLockedForWrite( hkUint32 key, hkUint32 chunkSize );
- /// Critical section enter.
- virtual void enterCriticalSection( );
- /// Critical section leave.
- virtual void leaveCriticalSection( );
- private:
- // internal method used by (un)lock / retrieve / flushKey to manipulate locked status
- hkBool manipulateKeyMT( hkUint32 key, hkUint32 chunkSize, hkUint8 operation, hkUint8** chunkPointer );
- hkCriticalSection m_criticalSection;
- };
- #endif // HK_MULTITHREADED_CHUNK_CACHE
- /*
- * Havok SDK - NO SOURCE PC DOWNLOAD, BUILD(#20090216)
- *
- * Confidential Information of Havok. (C) Copyright 1999-2009
- * Telekinesys Research Limited t/a Havok. All Rights Reserved. The Havok
- * Logo, and the Havok buzzsaw logo are trademarks of Havok. Title, ownership
- * rights, and intellectual property rights in the Havok software remain in
- * Havok and/or its suppliers.
- *
- * Use of this software for evaluation purposes is subject to and indicates
- * acceptance of the End User licence Agreement for this product. A copy of
- * the license is included with this software and is also available at www.havok.com/tryhavok.
- *
- */