1 // Copyright (c) 2001-2009 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 //

    15 

    16 #include "MmfFifo.h"

    17 

    18 const TInt TMMFFifoItemBase::iOffset = _FOFF(TMMFFifoItemBase, iSlink);

    19 

    20 

    21 /**

    22  *

    23  * Construct

    24  *

    25  */

    26 CMMFFifoBase::CMMFFifoBase() : iFifo(TMMFFifoItemBase::iOffset), iFifoIter(iFifo)

    27 	{

    28 	}

    29 

    30 

    31 /**

    32  *

    33  *	Destructor

    34  *

    35  */

    36 CMMFFifoBase::~CMMFFifoBase()

    37 	{

    38 	TMMFFifoItemBase* item;

    39 	iFifoIter.SetToFirst();

    40 	while((item = iFifoIter++)!=NULL)

    41 		{

    42 		iFifo.Remove(*item);

    43 		delete item;

    44 		};

    45 	}

    46 

    47 

    48 /**

    49  *

    50  *  To remove the first stream data from queue	

    51  *

    52  */

    53 void CMMFFifoBase::RemoveFirstItemBase()

    54 	{

    55 	if(!iFifo.IsEmpty())

    56 		{

    57 		iFifo.Remove(*iFifo.First());

    58 		}

    59 	}

    60 

    61 /**

    62  *

    63  *  To get the first stream data from queue	

    64  *

    65  *	@return	"CMMFFifoItem*"	

    66  *			a pointer point to the stream data

    67  *

    68  */

    69 TMMFFifoItemBase* CMMFFifoBase::GetBase()

    70 	{

    71 	TMMFFifoItemBase* firstItem;

    72 	if(iFifo.IsEmpty())

    73 		return NULL;

    74 	firstItem = iFifo.First();

    75 	return firstItem;

    76 	}

    77 

    78 /**

    79  *

    80  *  To add a stream data to the queue, the data will be added at end of queue

    81  *

    82  *	@param	"TMMFFifoItemBase& aItem"	

    83  *			a reference to data

    84  *

    85  */

    86 void CMMFFifoBase::AddToFifo(TMMFFifoItemBase& aItem)

    87 	{

    88 	iFifo.AddLast(aItem);

    89 	}

    90 

    91 /**

    92  *

    93  *  To check stream data queue empty or not	

    94  *

    95  *	@return	"TBool"	

    96  *			a boolean value to indicate the queue is empty or not (ETrue is empty)

    97  *

    98  */

    99 TBool CMMFFifoBase::IsEmpty()

   100 	{

   101 	return iFifo.IsEmpty();

   102 	}

   103 

   104 

   105 

   106 

   107 

   108