/*

 * 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: 

 * Library to add s32strm support for IPC (ie. stream via multiple IPC read/writes instead of

 * copying to a buffer and streaming to/from there.

 *

 */

 /**

  @file

  @internalTechnology

  @released

 */

 #ifndef __IPCBUF_H__

 #define __IPCBUF_H__

 #include <e32base.h>

 #include <s32buf.h>

 _LIT(KIpcBufPanic, "IpcBuf");

 class RIpcBuf : public MStreamBuf

 	{

 public:

 IMPORT_C void Open(const RMessagePtr2& aMessage, TInt aMessageSlot);

 protected:

 IMPORT_C TStreamPos DoSeekL(TMark aMark, TStreamLocation aLocation, TInt anOffset);

 IMPORT_C TInt DoReadL(TAny *aPtr, TInt aMaxLength);

 IMPORT_C void DoWriteL(const TAny* aPtr,TInt aLength);

 private:

 	enum TIpcBufPanic

 		{

 		EIpcBufSeekUnknownLocation,

 		EIpcBufSeekBadOffset

 		};

 private:

 	TInt iReadPos;

 	TInt iWritePos;

 	RMessagePtr2 iMessage;

 	TInt iMessageSlot;

 	};

 #endif /* __IPCBUF_H__ */