// 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;

	}