// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

//

#ifndef CACHEMGR_H

#define CACHEMGR_H

#include <e32base.h>

#include "log.h"

#include "panic.h"

#include "srvdefs.h"

_LIT(KCacheMgrIniFile, "centrep.ini");

class CSharedRepository;

/**

@internalTechnology

This is the class which manages Coarse-Grained cache operations including delayed-unloading of

repositories and forced eviction of repositories under OOM conditions.

*/

class CRepositoryCacheManager : public CTimer

	{

	friend class TRepositoryCacheManagerTester;

public:

	static CRepositoryCacheManager* NewLC();

	~CRepositoryCacheManager();

	void ConstructL();

	void EnableCache();

	void DisableCache();

	void EnableCache(TInt aDefaultTimeout, TInt aCacheSize);

	inline TBool Enabled();

	TBool StartEviction(CSharedRepository*& aRepository);

	void RemoveIdleRepository(CSharedRepository* aRepository);	

	void FlushCache();

protected:

	/**

	@internalTechnology

	This is the class/structure which keeps eviction-related cache data 

	*/

	class TRepositoryCacheInfo

		{

	public:

		TTime iCacheTime;

		CSharedRepository* iSharedRepository;

		};

	void RunL();

private:

	inline CRepositoryCacheManager(); 

	void Evict(TInt aIdleRepIndex);

	static TInt ForcedEvictionSortOrder(const TRepositoryCacheInfo &aRepository1, const TRepositoryCacheInfo &aRepository2);

	static TInt TimerEvictionSortOrder(const TRepositoryCacheInfo &aRepository1, const TRepositoryCacheInfo &aRepository2);	

private:

	TBool iEnabled; 

	TInt  iTotalCacheUsage; 

	RArray<TRepositoryCacheInfo> iIdleRepositories;

	TTimeIntervalMicroSeconds32 iDefaultTimeout;

	TInt  iCacheSize;

	};

#include "cachemgr.inl"

#endif // CACHEMGR_H