// 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 "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:

// Heap Memory Allocation for CMBufPoolAllocator 

// 

//

/** 	  	 

@file 	  	 

@internalComponent 	  	 

*/

#include "mbufmanager.h"

#include "MBufMemoryAllocator.h"

#include "MBufPool.h"

#include <cflog.h>

#ifdef __CFLOG_ACTIVE

__CFLOG_STMT(_LIT8(KComponent, "MemoryAllocator");)

__CFLOG_STMT(_LIT8(KSubsysMBufMgr, "MBufMgr");) // subsystem name

#endif

CMBufMemoryAllocator* CMBufMemoryAllocator::NewL(TInt aMaxHeapSize)

//

// Construction - first phase

//

	{

	CMBufMemoryAllocator* memAllocator = new(ELeave) CMBufMemoryAllocator;

	CleanupStack::PushL(memAllocator);

	memAllocator->ConstructL(aMaxHeapSize);

	CleanupStack::Pop();

	return memAllocator;

	}

CMBufMemoryAllocator::CMBufMemoryAllocator()

	: CBase()

//

// Constructor

//

	{

#ifdef __CFLOG_ACTIVE

	__CFLOG_VAR((KSubsysMBufMgr, KComponent, _L8("CMBufManager %x:\tCMBufMemoryAllocator()"),this));

#endif

	}

void CMBufMemoryAllocator::ConstructL(TInt aMaxHeapSize)

//

// Construction - second phase

//

	{

	iHeap = UserHeap::ChunkHeap(NULL, 0, aMaxHeapSize);

	if (iHeap==NULL)

		{

#ifdef __CFLOG_ACTIVE

		__CFLOG_2(KSubsysMBufMgr, KComponent, _L8("CMBufManager::CMBufMemoryAllocator %x:\tCreateL(0, aMaxHeapSize %d) leaving with KErrNoMemory"), this, aMaxHeapSize);

#endif

		User::Leave(KErrNoMemory);

		}

	}

CMBufMemoryAllocator::~CMBufMemoryAllocator()

//

// Destructor

//

	{

	iHeap->Close();

	}

TAny* CMBufMemoryAllocator::Alloc(TInt aSize)

//

// Allocates memory from the heap

//

	{

	TAny* pMemory;

	pMemory = iHeap->Alloc(aSize);

	return pMemory;

	}

void CMBufMemoryAllocator::Free(TAny* aPtr)

//

// Returns memory to the heap

//

	{

	CMBufPool* pool = (CMBufPool* ) aPtr;

	iHeap->Free(pool);

	}

TInt CMBufMemoryAllocator::AllocBytes()

//

// Number of bytes allocated from the heap

//

	{

	TInt allocated;

	iHeap->AllocSize(allocated);

	return allocated;

	}