cachobj.h
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef _HXFIFOCACHE_
- #define _HXFIFOCACHE_
- #include "hxcache.h"
- class CChunkyRes;
- struct ChunkyCacheLayout
- {
- UINT16 size;
- GUID guid;
- };
-
- class HXFIFOCache : public IHXFIFOCache
- {
- private:
- LONG32 m_lRefCount;
- CChunkyRes* m_pChunkyRes;
- UINT32 m_ulCurrentReadPosition;
- UINT32 m_ulCurrentWritePosition;
- public:
- HXFIFOCache();
- ~HXFIFOCache();
- /*
- * IUnknown methods
- */
- STDMETHOD(QueryInterface) (THIS_
- REFIID riid,
- void** ppvObj);
- STDMETHOD_(ULONG32,AddRef) (THIS);
- STDMETHOD_(ULONG32,Release) (THIS);
- /*
- * IHXFIFOCache methods
- */
- /************************************************************************
- * Method:
- * IHXFIFOCache::Cache
- * Purpose:
- * To cache objects in a temporary storage for later retrieval
- *
- * Currently supported objects:
- * IHXBuffer
- * IHXValues
- * IHXPacket
- // $Private:
- * IHXTimeStampedBuffer
- * IHXClientPacket
- // $EndPrivate.
- *
- */
- STDMETHOD(Cache) (THIS_
- IUnknown* pObject);
- /************************************************************************
- * Method:
- * IHXFIFOCache::Retrieve
- * Purpose:
- *
- *
- */
- STDMETHOD(Retrieve) (THIS_
- REF(IUnknown*) pObject);
- /************************************************************************
- * Method:
- * IHXFIFOCache::Flush
- * Purpose:
- *
- *
- */
- STDMETHOD(Flush) (THIS);
- private:
- HX_RESULT CacheClientPacket(IHXClientPacket* pClientPacket);
- HX_RESULT CacheTimestampBuffer(IHXTimeStampedBuffer* pTimeStampBuffer);
- HX_RESULT CacheBuffer(IHXBuffer* pBuffer);
- HX_RESULT CachePacket(IHXPacket* pPacket);
- HX_RESULT CacheValues(IHXValues* pValues);
- };
- #endif /*_HXFIFOCACHE_*/