kernel/eka/include/memmodel/epoc/mmubase/defrag.h
author Tom Cosgrove <tom.cosgrove@nokia.com>
Fri, 28 May 2010 16:29:07 +0100
changeset 30 8aab599e3476
parent 0 a41df078684a
permissions -rw-r--r--
Fix for bug 2283 (RVCT 4.0 support is missing from PDK 3.0.h) Have multiple extension sections in the bld.inf, one for each version of the compiler. The RVCT version building the tools will build the runtime libraries for its version, but make sure we extract all the other versions from zip archives. Also add the archive for RVCT4.

// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of the License "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// e32\include\memmodel\epoc\mmubase\defrag.h
// 
//

#ifndef __DEFRAG_H__
#define __DEFRAG_H__

/******************************************************************************
 * Base class for RAM defragmentation implementation
 ******************************************************************************/

struct SZone;
class DRamAllocator;
/**
@internalComponent
*/
class Defrag
	{
public:
	enum TPanic
		{
		EDfcQInitFailed=0,
		};

public:
	
	// platform independent - defragbase.cpp
	Defrag();
	void Init3(DRamAllocator* aRamAllocator);
	static void DefragTask(TAny* aArg);
private:
	TInt GeneralDefrag(TRamDefragRequest* aRequest);
	TInt ClaimRamZone(TRamDefragRequest* aRequest);
	TInt EmptyRamZone(TRamDefragRequest* aRequest);
	TInt ClearZone(SZone& aZone, TUint aMaxRetries, TRamDefragRequest* aRequest);
	TInt ClearMovableFromZone(SZone& aZone, TBool aBestEffort, TRamDefragRequest* aRequest);
	TInt ClearDiscardableFromZone(SZone& aZone, TBool aBestEffort, TRamDefragRequest* aRequest, TUint* aMaxDiscard=NULL);
	static void Panic(TPanic aPanic);

	// data

private:
	TInt iDefragPriority;
	TDfcQue iTaskQ;
	DRamAllocator* iRamAllocator;

	static Defrag* TheDefrag; // single instance of the defragmentor

	friend class TRamDefragRequest;	// This needs access to iDefragPriority and iTaskQ
	};

#endif