growingq.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 
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 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
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/*******************************************************************
 *
 *  NAME:	GrowingQ.h
 *
 *  CLASS:
 *	CBigByteGrowingQueue definition & declaration
 *
 *  DESCRIPTION:
 *	Class declaration for a CBigByteQueue that automaticlly grows
 *	on EnQueue.  also adds an EnQueue that queues a string
 *
 *******************************************************************/

#ifndef _GROWINGQ_H_
#define _GROWINGQ_H_

#include "cbbqueue.h"
#include "cbqueue.h"

class CBigByteGrowingQueue: public CBigByteQueue
{
public:
    CBigByteGrowingQueue(UINT32 ulSize) :
	CBigByteQueue(ulSize) {}

    UINT32 EnQueue( void *pInBuffer, UINT32 ulItemCount ) 
    {
	if ( GetAvailableElements() < ulItemCount )
	{
	    HX_VERIFY(Grow(ulItemCount) == 1);
	}
	return CBigByteQueue::EnQueue(pInBuffer, ulItemCount );
    }
    UINT32 EnQueue( const char* pBuf )
    {
	return EnQueue((char*)pBuf, strlen(pBuf));
    }
};


class CByteGrowingQueue: public CByteQueue
{
public:
    CByteGrowingQueue(UINT16 nSize, UINT16 nGranularity = 1) :
	CByteQueue(nSize, nGranularity) {}

    UINT16 EnQueue( void *pInBuffer, UINT16 nItemCount ) 
    {
	if (GetAvailableElements() < nItemCount)
	{
	    HX_VERIFY(Grow(nItemCount) == 1);
	}

	return CByteQueue::EnQueue(pInBuffer, nItemCount);
    }
};

#endif // _GROWINGQ_H