// Copyright (c) 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:

 // Graphics Resource - kernel resource implementation

 //

 #include <kernel/kern_priv.h>

 #include "sgextensionimpl.h"

 DSgResourceImpl::DSgResourceImpl(DSgExtensionImpl& aExtensionImpl, TUint64 aId, TUint32 aAttribs,

 	                             const TDesC8& aMetaData, DChunk* aDataChunk, TInt aDataSize)

 	: iExtensionImpl(aExtensionImpl), iRefCount(1), iId(aId), iAttributes(aAttribs),

 	  iMetaDataSize(aMetaData.Size()), iDataChunk(aDataChunk), iDataSize(aDataSize)

 	{

 	memcpy(this + 1, aMetaData.Ptr(), aMetaData.Size());

 	}

 DSgResourceImpl::~DSgResourceImpl()

 	{

 	if (iDataChunk)

 		{

 		Kern::ChunkClose(iDataChunk);

 		}

 	}

 TInt DSgResourceImpl::Open()

 	{

 	return NKern::SafeInc(iRefCount) > 0 ? KErrNone : KErrNotFound;

 	}

 void DSgResourceImpl::Close()

 	{

 	if (NKern::SafeDec(iRefCount) == 1)

 		{

 		iExtensionImpl.DeleteResource(this);

 		}

 	}

 TUint64 DSgResourceImpl::Id() const

 	{

 	return iId;

 	}

 TUint32 DSgResourceImpl::Attributes() const

 	{

 	return iAttributes;

 	}

 TInt DSgResourceImpl::GetMetaData(TDes8& aMetaData) const

 	{

 	if (aMetaData.MaxSize() < iMetaDataSize)

 		{

 		return KErrOverflow;

 		}

 	if (iMetaDataSize == 0)

 		{

 		aMetaData.Zero();

 		}

 	else

 		{

 		aMetaData.Copy(TPtrC8(reinterpret_cast<const TUint8*>(this + 1), iMetaDataSize));

 		}

 	return KErrNone;

 	}

 DChunk* DSgResourceImpl::DataChunk() const

 	{

 	return iDataChunk;

 	}

 TInt DSgResourceImpl::DataSize() const

 	{

 	return iDataSize;

 	}