1 // Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // Graphics Resource - kernel resource implementation

    15 //

    16 

    17 #include <kernel/kern_priv.h>

    18 #include "sgextensionimpl.h"

    19 

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

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

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

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

    24 	{

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

    26 	}

    27 

    28 DSgResourceImpl::~DSgResourceImpl()

    29 	{

    30 	if (iDataChunk)

    31 		{

    32 		Kern::ChunkClose(iDataChunk);

    33 		}

    34 	}

    35 

    36 TInt DSgResourceImpl::Open()

    37 	{

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

    39 	}

    40 

    41 void DSgResourceImpl::Close()

    42 	{

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

    44 		{

    45 		iExtensionImpl.DeleteResource(this);

    46 		}

    47 	}

    48 

    49 TUint64 DSgResourceImpl::Id() const

    50 	{

    51 	return iId;

    52 	}

    53 

    54 TUint32 DSgResourceImpl::Attributes() const

    55 	{

    56 	return iAttributes;

    57 	}

    58 

    59 TInt DSgResourceImpl::GetMetaData(TDes8& aMetaData) const

    60 	{

    61 	if (aMetaData.MaxSize() < iMetaDataSize)

    62 		{

    63 		return KErrOverflow;

    64 		}

    65 	if (iMetaDataSize == 0)

    66 		{

    67 		aMetaData.Zero();

    68 		}

    69 	else

    70 		{

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

    72 		}

    73 	return KErrNone;

    74 	}

    75 

    76 DChunk* DSgResourceImpl::DataChunk() const

    77 	{

    78 	return iDataChunk;

    79 	}

    80 

    81 TInt DSgResourceImpl::DataSize() const

    82 	{

    83 	return iDataSize;

    84 	}