// 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

		}

	}