// 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 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:

 // 

 #include <kernel/kernel.h>

 #include "d_buffer_manager.h"

 using namespace Debug;

 // Global buffer manager

 DBufferManager TheDBufferManager;

 DBufferManager::DBufferManager()

 	{

 	}

 DBufferManager::~DBufferManager()

 	{

 	for(TInt i=0; i<iBuffers.Count(); i++)

 		{

 		if(iBuffers[i].iSize>0 && iBuffers[i].iValue)

 			{

 			Kern::Free((TAny*)iBuffers[i].iValue);

 			}

 		}

 	iBuffers.Close();

 	}

 /**

  * Creates a buffer and adds it to the buffer manager

  * @param aBufferDetails Contains the size and tag ID of the buffer to be created and the location

  *						in which the resulting buffer is created

  * @return One of the System wide error codes

  */

 TInt DBufferManager::CreateBuffer(TTag& aBufferDetails)

 	{

 	if(aBufferDetails.iType != ETagTypePointer)

 		{

 		return KErrArgument;

 		}

 	if(aBufferDetails.iSize == 0)

 		{

 		return KErrArgument;

 		}

 	for(TInt i=0; i<iBuffers.Count(); i++)

 		{

 		if(iBuffers[i].iTagId == aBufferDetails.iTagId)

 			{

 			return KErrAlreadyExists;

 			}

 		}

 	TAny* buffer = Kern::AllocZ(aBufferDetails.iSize);

 	if(!buffer)

 		{

 		return KErrNoMemory;

 		}

 	aBufferDetails.iValue = (TUint32)buffer;

 	if(KErrNone != iBuffers.Append(aBufferDetails))

 		{

 		Kern::Free(buffer);

 		return KErrNoMemory;

 		}

 	return KErrNone;

 	}

 /**

  * Retrieves buffer details for a given tag

  * @param aTag The tag for which to get buffer details

  * @return One of the System wide error codes

  */

 TInt DBufferManager::GetBufferDetails(const TBufferType aBufferType, TTag& aTag) const

 	{

 	for(TInt i=0; i<iBuffers.Count(); i++)

 		{

 		if(iBuffers[i].iTagId == aBufferType)

 			{

 			aTag = iBuffers[i];

 			return KErrNone;

 			}

 		}

 	aTag.iTagId = aBufferType;

 	aTag.iType = ETagTypePointer;

 	aTag.iSize = 0;

 	aTag.iValue = NULL;

 	return KErrNotFound;

 	}