medblock.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, 
 * 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 ***** */ 

#include "hxcom.h"
#include "hxengin.h"
#include "hxtick.h"
#include "hxthread.h"

struct CMemoryNode;

struct CMemoryNode
{
    CMemoryNode*    m_pNext;
    UINT32	    m_nSize;
};

class CMediumBlockAllocator
    : public IMalloc
    , public IHXCallback
{
public:
   /*
    * IUnknown methods
    */
    STDMETHOD(QueryInterface)	(THIS_
				REFIID riid,
				void** ppvObj);

    STDMETHOD_(ULONG32,AddRef)	(THIS);

    STDMETHOD_(ULONG32,Release)	(THIS);

    /*
     * IMalloc methods
     */
    STDMETHOD_(void*,Alloc)	    (THIS_
				    UINT32  /*IN*/ count);

    STDMETHOD_(void*,Realloc)	    (THIS_
				    void*   /*IN*/ pMem,
				    UINT32  /*IN*/ count);

    STDMETHOD_(void,Free)	    (THIS_
				    void*   /*IN*/ pMem);

    STDMETHOD_(UINT32,GetSize)	    (THIS_
				    void*   /*IN*/ pMem);

    STDMETHOD_(BOOL,DidAlloc)	    (THIS_
				    void*   /*IN*/ pMem);

    STDMETHOD_(void,HeapMinimize)   (THIS);

    /*
     * IHXCallback methods
     */
    STDMETHOD(Func)		(THIS);

    void RelaxBuckets();
    void SetScheduler(IUnknown* pUnk);
    CMediumBlockAllocator();
    PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME    

private:

    ~CMediumBlockAllocator();

    UINT32	    m_nMinBucketSize;
    UINT32	    m_nNumberBuckets;
    UINT32	    m_nBucketSize;
    CMemoryNode**   m_ppBuckets;
    UINT32*	    m_pTimeStampArray;
    UINT32*	    m_pCountArray;
    UINT32	    m_nLastTimeStamp;    
    UINT32	    m_nCurrentTimeStamp;
    UINT32	    m_nLastRelaxTime;
    UINT32	    m_nLastMinimizeTime;
    UINT32	    m_nHeaderSize;
    UINT32	    m_nRelaxTime;
    UINT32	    m_nCallbackTime;
    UINT32	    m_nGarbageTime;
    UINT32	    m_nGarbageDivider;
    LONG32	    m_lRefCount;
    CallbackHandle  m_hCallback;
    IHXScheduler*  m_pScheduler;
    HXMutex*	    m_pMutex;
};