// Copyright (c) 1997-2009 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:

 // f32test\concur\cfafshmem.cpp

 // Definition of the THMem class member functions.

 // 

 //

 #include "cfafshmem.h"

 THMem::THMem(void * aNewMemPtr) :	iMemPtr(aNewMemPtr), 

 	//iNoMess(ETrue),

 	//threadHandle(NO_THREAD), 

 	iBaseOffset(KNoOffset)

 /**

  *  Constructor. Initialises the members of THMem.

  *

  *  @param aNewMemPtr  Pointer to the memory that this THMem will

  *                     represent

  *  @internalComponent

  */

 	{ 

 	iMessage=NULL;

 	}

 THMem::THMem(const void * aNewMemPtr,const RMessagePtr2& aMessage,int aNewOffset) 

 	: iMemPtr((void*)aNewMemPtr), iBaseOffset(aNewOffset)

 /**

  *  Constructor. Initialises the members of THMem.

  *

  *  @param aNewMemPtr  Pointer to the memory that this THMem will

  *                     represent

  *  @param aMessage

  *  @param aNewOffset

  *  @internalComponent

  */

 	{ 

 	iMessage=(RMessagePtr2*)&aMessage;

 	}

 TInt THMem::Read(void *aBuf, TUint32 aLength, TUint aOffset) const

 /**

  *  Reads a chunk of memory from the THMem.

  *

  *  @param aBuf     goal buffer bointer

  *  @param aLength  how many bytes that will be read from

  *                  the THMem

  *  @param aOffset  offset into the THMem where the function

  *                  will start reading

  *  @return Error code              -   KErrNone on success

  *  @internalComponent

  */

 	{

 	if(iMessage==NULL)

 		{

 		memcpy(aBuf, ((TUint8*)iMemPtr + aOffset), (TInt)aLength);

 		// Always return success

 		return KErrNone;

 		}

 	else if ((iMessage == NULL) || (iMessage->Handle() == KLocalMessageHandle))

 		{

 		TUint8* ptr = (TUint8*) ((TDes8*) iMemPtr)->Ptr();

 		memcpy(aBuf, ptr + iBaseOffset + aOffset, (TInt)aLength);

 		// Always return success

 		return KErrNone;

 		}

 	else

 		{

 #if defined(__SYMBIAN32__)

 		// Create EPOC memory representation

 		TPtr8 mem((TUint8*)aBuf,aLength);

 		// Create EPOC memory representation

 		TRAPD(res,iMessage->ReadL(0,mem, iBaseOffset + aOffset));

 		// Return error code

 		return (TInt)res;

 #else

 		LFFS_ASSERT(0);

 		return E_GENERAL;

 #endif

 		}

 	}

 TInt THMem::Write(const void *aBuf, TUint32 aLength, TUint32 aOffset)

 /**

  *  Writes a chunk of memory to the THMem.

  *

  *  @param aBuf     source buffer bointer

  *  @param aLength  how many bytes that will be written to

  *                  the THMem

  *  @param aOffset  offset into the THMem where the function

  *                  will start writing

  *  @return Error code              -   KErrNone on success

  *  @internalComponent

  */

 	{

 	if (iMessage == NULL)

 		{

 		memcpy(((TUint8*)iMemPtr + aOffset), aBuf, (TInt)aLength);

 		// Always return success

 		return KErrNone;

 		}

 	else if ((iMessage == NULL) || (iMessage->Handle() == KLocalMessageHandle))

 		{

 		TUint8* ptr = (TUint8*) ((TDes8*) iMemPtr)->Ptr();

 		memcpy(ptr + iBaseOffset + aOffset, aBuf, (TInt)aLength);

 		return KErrNone;

 		}

 	else

 		{

 #if defined(__SYMBIAN32__)

 		// Create EPOC memory representation

 		TPtrC8 mem((TUint8*)aBuf,aLength);

 		// Use message to write back to client thread

 		TRAPD( res,iMessage->WriteL(0,mem, iBaseOffset + aOffset) );

 		// Return error code

 		return (TInt)res;

 #else

 		LFFS_ASSERT(0);

 		return E_GENERAL;

 #endif

 		}

 	}