// 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 "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 __D_SHAREDCHUNK_H__

#define __D_SHAREDCHUNK_H__

#include <e32cmn.h>

#ifndef __KERNEL_MODE__

#include <e32std.h>

#endif

_LIT(KSharedChunkLddName,"D_SHAREDCHUNK");

enum TCreateFlags

	{

	ESingle				= 0x00,

	EMultiple			= 0x01,

	EOwnsMemory			= 0x02,

	EBadType			= 0x80,

	ECreateFlagsMask	= 0xff

	};

enum TCacheAttribute

	{

	/** CPU cached */

	ECached = 0,

	/** Non CPU cached */

	ENotCached = 1

	};

enum TCommitType

	{

	ENonContiguous			= 0x00,

	EContiguous				= 0x01,

	ECommitTypeMask			= 0x0f

	};

class RSharedChunkLdd : public RBusLogicalChannel

	{

public:

	enum TControl

		{

		ECreateChunk,

		EGetChunkHandle,

		ECommitMemory,

		ECloseChunk,

		ECacheAttribute,

		EContiguousAttribute,

		ECloseChunkHandle

		};

#ifndef __KERNEL_MODE__

public:

	inline TInt Open()

		{ return DoCreate(KSharedChunkLddName,TVersion(),KNullUnit,NULL,NULL,EOwnerProcess,ETrue); }

	inline TInt CreateChunk(TInt aSize, TAny** aKernelAddress=0)

		{ return DoControl(ECreateChunk,(TAny*)aSize,aKernelAddress); }

	inline TInt GetChunkHandle(RChunk& aChunk)

		{ return aChunk.SetReturnedHandle(DoControl(EGetChunkHandle)); }

	inline TInt CommitMemory(TInt aOffset, TInt aSize)

		{ return DoControl(ECommitMemory,(TAny*)aOffset,(TAny*)aSize); }

	inline TInt CloseChunk()

		{ return DoControl(ECloseChunk); }

	inline TInt GetCacheAttribute()

		{return DoControl(ECacheAttribute);}

	inline TBool GetContiguousAttribute()

		{return DoControl(EContiguousAttribute);}

	inline TInt CloseChunkHandle(RChunk aChunk)

		{ return DoControl(ECloseChunkHandle,(TAny*)aChunk.Handle()); }

#endif

	};

#endif