sl@0: // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // e32\include\memmodel\epoc\mmubase\defrag.h
sl@0: // 
sl@0: //
sl@0: 
sl@0: #ifndef __DEFRAG_H__
sl@0: #define __DEFRAG_H__
sl@0: 
sl@0: /******************************************************************************
sl@0:  * Base class for RAM defragmentation implementation
sl@0:  ******************************************************************************/
sl@0: 
sl@0: struct SZone;
sl@0: class DRamAllocator;
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: class Defrag
sl@0: 	{
sl@0: public:
sl@0: 	enum TPanic
sl@0: 		{
sl@0: 		EDfcQInitFailed=0,
sl@0: 		};
sl@0: 
sl@0: public:
sl@0: 	
sl@0: 	// platform independent - defragbase.cpp
sl@0: 	Defrag();
sl@0: 	void Init3(DRamAllocator* aRamAllocator);
sl@0: 	static void DefragTask(TAny* aArg);
sl@0: private:
sl@0: 	TInt GeneralDefrag(TRamDefragRequest* aRequest);
sl@0: 	TInt ClaimRamZone(TRamDefragRequest* aRequest);
sl@0: 	TInt EmptyRamZone(TRamDefragRequest* aRequest);
sl@0: 	TInt ClearZone(SZone& aZone, TUint aMaxRetries, TRamDefragRequest* aRequest);
sl@0: 	TInt ClearMovableFromZone(SZone& aZone, TBool aBestEffort, TRamDefragRequest* aRequest);
sl@0: 	TInt ClearDiscardableFromZone(SZone& aZone, TBool aBestEffort, TRamDefragRequest* aRequest, TUint* aMaxDiscard=NULL);
sl@0: 	static void Panic(TPanic aPanic);
sl@0: 
sl@0: 	// data
sl@0: 
sl@0: private:
sl@0: 	TInt iDefragPriority;
sl@0: 	TDfcQue iTaskQ;
sl@0: 	DRamAllocator* iRamAllocator;
sl@0: 
sl@0: 	static Defrag* TheDefrag; // single instance of the defragmentor
sl@0: 
sl@0: 	friend class TRamDefragRequest;	// This needs access to iDefragPriority and iTaskQ
sl@0: 	};
sl@0: 
sl@0: #endif