author | sl |
Tue, 10 Jun 2014 14:32:02 +0200 | |
changeset 1 | 260cb5ec6c19 |
permissions | -rw-r--r-- |
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// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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|
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#ifndef _MMRCUTIL_H_ |
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#define _MMRCUTIL_H_ |
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|
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#include <e32base.h> |
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|
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template <class T> |
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class RMMRCFifoQueue |
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{ |
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public: |
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RMMRCFifoQueue( ); |
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~RMMRCFifoQueue( ); |
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|
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void Reset( ); |
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void ResetAndDestroy(); |
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TBool IsEmpty( ) const; |
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TInt Count() const; |
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T* PopAndRemove( ); |
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T* PopAndRemove( TInt aIndex ); |
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void PushL( T const* const aElement ); |
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T* Pop( ) const; |
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T* Pop( TInt aIndex ) const; |
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T* operator[] ( TInt aIndex ) const; |
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|
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private: |
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RMMRCFifoQueue( const RMMRCFifoQueue & aMMRCFifoQueue ); //not implemented |
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const RMMRCFifoQueue & operator= ( const RMMRCFifoQueue & aMMRCFifoQueue ); //not implemented |
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|
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private: |
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struct TListNode |
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{ |
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T const* iElement; |
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TListNode *iNext; |
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|
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TListNode( T const* const aElement ) |
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: iElement( aElement ), iNext(NULL) { } |
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}; |
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|
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TListNode *iFirst; |
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TListNode *iLast; |
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TInt iCount; |
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}; |
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|
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/** |
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Construct the queue. |
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*/ |
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template <class T> |
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RMMRCFifoQueue<T>::RMMRCFifoQueue( ) |
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{ |
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iFirst = iLast = NULL; |
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iCount = 0; |
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} |
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|
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/** |
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Destructor. |
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*/ |
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template <class T> |
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RMMRCFifoQueue<T>::~RMMRCFifoQueue( ) |
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{ |
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Reset( ); |
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} |
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|
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|
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/** |
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Delete each node without deleting the elements. |
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*/ |
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template <class T> |
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void RMMRCFifoQueue<T>::Reset( ) |
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{ |
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while( !IsEmpty( ) ) |
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{ |
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PopAndRemove( ); |
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} |
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} |
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|
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/** |
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Delete each node and each element. |
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*/ |
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template <class T> |
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void RMMRCFifoQueue<T>::ResetAndDestroy( ) |
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{ |
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while( !IsEmpty( ) ) |
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{ |
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T* element = PopAndRemove( ); |
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delete element; |
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} |
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} |
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|
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/** |
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Return the number of elements. |
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*/ |
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template <class T> |
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TInt RMMRCFifoQueue<T>::Count( ) const |
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{ |
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return iCount; |
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} |
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|
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|
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/** |
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Test if the queue is logically empty. |
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Return TTrue if empty, TFalse, otherwise. |
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*/ |
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template <class T> |
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TBool RMMRCFifoQueue<T>::IsEmpty( ) const |
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{ |
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return iFirst == NULL; |
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} |
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|
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|
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/** |
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Return and remove the least recently inserted item from the queue. |
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*/ |
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template <class T> |
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T* RMMRCFifoQueue<T>::PopAndRemove( ) |
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{ |
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T* element = NULL; |
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if( !IsEmpty( ) ) |
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{ |
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TListNode* front = iFirst; |
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element = const_cast<T*>(iFirst->iElement); |
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iFirst = iFirst->iNext; |
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if( NULL == iFirst ) |
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{ |
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iLast = NULL; |
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} |
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iCount--; |
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delete front; |
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front = NULL; |
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} |
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return element; |
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} |
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|
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/** |
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Return and remove the least recently inserted item from the queue. |
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*/ |
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template <class T> |
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T* RMMRCFifoQueue<T>::PopAndRemove( TInt aIndex ) |
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{ |
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T* element = NULL; |
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TListNode* PreviousNode = NULL; |
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TListNode* node = iFirst; |
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TInt i = 0; |
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for( ; i<aIndex && i<iCount && node->iNext ; i++) |
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{ |
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PreviousNode = node; |
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node = node->iNext; |
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} |
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|
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if(node && i < iCount) |
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{ |
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if(PreviousNode) |
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{ |
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PreviousNode->iNext = node->iNext; |
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if( NULL == node->iNext ) |
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{ |
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iLast = PreviousNode; |
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} |
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} |
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else |
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{ |
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iFirst = node->iNext; |
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if( NULL == iFirst ) |
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{ |
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iLast = NULL; |
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} |
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} |
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element = const_cast<T*>(node->iElement); |
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iCount--; |
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delete node; |
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} |
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return element; |
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} |
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|
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/** |
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Insert aElement into the queue. |
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*/ |
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template <class T> |
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void RMMRCFifoQueue<T>::PushL( T const* const aElement ) |
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{ |
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if( IsEmpty( ) ) |
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{ |
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iLast = iFirst = new(ELeave) TListNode( aElement ); |
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} |
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else |
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{ |
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iLast = iLast->iNext = new(ELeave) TListNode( aElement ); |
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} |
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iCount++; |
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} |
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|
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/** |
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Pop a pointer of the aIndex elements. |
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*/ |
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template <class T> |
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T* RMMRCFifoQueue<T>::Pop ( ) const |
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{ |
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T* element = NULL; |
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TListNode* node = iFirst; |
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|
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if( node ) |
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{ |
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element = const_cast<T*>(node->iElement); |
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} |
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|
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return element; |
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} |
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|
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/** |
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Pop a pointer of the aIndex elements. |
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*/ |
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template <class T> |
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T* RMMRCFifoQueue<T>::Pop ( TInt aIndex ) const |
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{ |
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T* element = NULL; |
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TListNode* node = iFirst; |
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|
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TInt i = 0; |
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for( ; (i < aIndex) && (i < iCount) && (node->iNext != NULL) ; i++) |
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{ |
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node = node->iNext; |
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} |
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|
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if( ( NULL != node ) |
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&& ( i < iCount ) ) |
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{ |
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element = const_cast<T*>(node->iElement); |
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} |
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|
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return element; |
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} |
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|
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/** |
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Pop a pointer of the aIndex elements. |
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*/ |
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template <class T> |
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T* RMMRCFifoQueue<T>::operator[] ( TInt aIndex ) const |
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{ |
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return Pop(aIndex); |
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} |
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|
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|
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/** |
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Class for manage the list of the sessions requesting pause. |
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*/ |
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template <class T> |
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class RMMRCFifoOrderQueue : private RMMRCFifoQueue <T> |
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{ |
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|
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public: |
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RMMRCFifoOrderQueue( ); |
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~RMMRCFifoOrderQueue( ); |
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void ResetAndDestroy( ); |
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TInt Count() const; |
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void PushL( T const* const aElement ); |
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T* PopAndRemoveForPause( TInt aIndex ); |
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T* operator[] ( TInt aIndex ) const; |
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|
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|
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private: |
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RPointerArray< T > iQueue; |
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}; |
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|
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|
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/** |
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Construct the queue. |
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*/ |
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template <class T> |
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RMMRCFifoOrderQueue<T>::RMMRCFifoOrderQueue( ) |
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{ |
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} |
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|
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/** |
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Destructor. |
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*/ |
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template <class T> |
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RMMRCFifoOrderQueue<T>::~RMMRCFifoOrderQueue( ) |
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{ |
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iQueue.Reset(); |
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iQueue.Close(); |
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} |
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|
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/** |
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Return the number of elements. |
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*/ |
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template <class T> |
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TInt RMMRCFifoOrderQueue<T>::Count( ) const |
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{ |
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|
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TInt iNum = iQueue.Count(); |
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return iNum; |
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} |
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|
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/** |
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Delete each node and each element. |
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*/ |
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template <class T> |
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void RMMRCFifoOrderQueue<T>::ResetAndDestroy( ) |
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{ |
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iQueue.ResetAndDestroy(); |
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} |
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|
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/** |
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Insert aElement into the queue and ordered. |
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*/ |
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template <class T> |
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void RMMRCFifoOrderQueue<T>::PushL( T const* const aElement ) |
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{ |
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TInt numElements = iQueue.Count(); |
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|
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if( numElements == 0 ) |
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{ |
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iQueue.Append(aElement); //iQueue: We need to check the error here |
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return; |
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} |
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|
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for(TInt i(0); i<numElements ; ++i) |
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{ |
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if(aElement->HasMultimediaCapability() && !(iQueue[i]->HasMultimediaCapability())) |
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{ |
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iQueue.Insert(aElement, i); |
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return; |
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} |
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else if(aElement->HasMultimediaCapability() == iQueue[i]->HasMultimediaCapability()) |
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{ |
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if (aElement->GetPriority() > iQueue[i]->GetPriority()) |
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{ |
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iQueue.Insert(aElement,i); |
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return; |
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} |
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} |
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} |
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iQueue.Insert(aElement,numElements); |
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} |
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|
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/** |
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Return and remove the inserted item from the queue. |
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*/ |
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template <class T> |
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T* RMMRCFifoOrderQueue<T>::PopAndRemoveForPause( TInt aIndex ) |
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{ |
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T* aux = NULL; |
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aux = iQueue[aIndex]; |
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iQueue.Remove(aIndex); |
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return aux; |
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} |
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|
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|
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/** |
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Pop a pointer of the aIndex elements. |
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*/ |
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template <class T> |
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T* RMMRCFifoOrderQueue<T>::operator[] ( TInt aIndex ) const |
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{ |
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if(iQueue.Count() != 0) |
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{ |
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return iQueue[aIndex]; |
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} |
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else |
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{ |
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return NULL; |
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} |
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} |
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|
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#endif /*_MMRCUTIL_H_*/ |