1 /*

     2 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

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

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

    17 *

    18 */

    19 

    20 

    21 /**

    22  @file

    23  @internalTechnology

    24  @released

    25 */

    26 #ifndef __IPCBUF_H__

    27 #define __IPCBUF_H__

    28 

    29 #include <e32base.h>

    30 #include <s32buf.h>

    31 

    32 _LIT(KIpcBufPanic, "IpcBuf");

    33 

    34 class RIpcBuf : public MStreamBuf

    35 	{

    36 public:

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

    38 	

    39 protected:

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

    41 

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

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

    44 	

    45 private:

    46 	enum TIpcBufPanic

    47 		{

    48 		EIpcBufSeekUnknownLocation,

    49 		EIpcBufSeekBadOffset

    50 		};

    51 	

    52 private:

    53 	TInt iReadPos;

    54 	TInt iWritePos;

    55 	RMessagePtr2 iMessage;

    56 	TInt iMessageSlot;

    57 	};

    58 

    59 

    60 

    61 #endif /* __IPCBUF_H__ */