chxcache2.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** 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, 
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 * 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 ***** */ 

#define D_CACHE2 0x2000000

class CHXCache2 : public IHXCache2
{
public:

    /****************************************************************************
     *  CHXcache2::CHXCache2
     *
     *  Constructor
     */

    CHXCache2();

    // IUnknown COM Interface Methods

    /****************************************************************************
     *  IUnknown::AddRef
     *
     *  This routine increases the object reference count in a thread safe
     *  manner. The reference count is used to manage the lifetime of an object.
     *  This method must be explicitly called by the user whenever a new
     *  reference to an object is used.
     */
        
    STDMETHOD_(ULONG32,AddRef)	(THIS);

    /****************************************************************************
     *  IUnknown::Release
     *
     *  This routine decreases the object reference count in a thread safe
     *  manner, and deletes the object if no more references to it exist. It must
     *  be called explicitly by the user whenever an object is no longer needed.
     */

    STDMETHOD_(ULONG32,Release)	(THIS);

    /****************************************************************************
     *  IUnknown::QueryInterface
     *
     *  This routine indicates which interfaces this object supports. If a given
     *  interface is supported, the object's reference count is incremented, and
     *  a reference to that interface is returned. Otherwise a NULL object and
     *  error code are returned. This method is called by other objects to
     *  discover the functionality of this object.
     */

    STDMETHOD(QueryInterface)	(THIS_
				REFIID riid,
				void** ppvObj);    


    /*
     *	IHXCache2 methods
     */
    
     /************************************************************************
     *	Method:
     *
     *	    IHXCache2::CreateMemCacheObject
     *
     *	Purpose:
     *
     *      Creates an object which implements the IHXCacheObject interface.
     *      This object uses ONLY the memory for caching.
     */

    STDMETHOD(CreateMemCacheObject)(THIS_
				     IHXCacheObject**           /*OUT*/	    ppObject,
                                     IHXCommonClassFactory*     /*IN*/      pClassFactory);

    
#ifdef HELIX_FEATURE_HTTP_FILECACHE

    /************************************************************************
     *	Method:
     *
     *	    IHXCache2::CreateFileCacheObject
     *
     *	Purpose:
     *
     *      Creates an object which implements the IHXCacheObject interface.
     */
    STDMETHOD(CreateFileCacheObject)	(THIS_
				        IHXCacheObject**        /*OUT*/	    ppObject,
                                        IHXCommonClassFactory*  /*IN*/      pClassFactory,
                                        UINT32                  /*IN*/      ulFileLength,
                                        char*                   /*IN*/      pFileName);
#endif  
    

private:

    INT32       m_RefCount;


}; // CHXCache2