williamr@2: // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
williamr@2: // All rights reserved.
williamr@2: // This component and the accompanying materials are made available
williamr@4: // under the terms of "Eclipse Public License v1.0"
williamr@2: // which accompanies this distribution, and is available
williamr@4: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
williamr@2: //
williamr@2: // Initial Contributors:
williamr@2: // Nokia Corporation - initial contribution.
williamr@2: //
williamr@2: // Contributors:
williamr@2: //
williamr@2: // Description:
williamr@2: // sbque.h - TCP sequence block queue
williamr@2: // Defines a queue for keeping tabs on contiguous blocks of sequence numbers.
williamr@2: //
williamr@2: 
williamr@2: 
williamr@2: 
williamr@2: /**
williamr@2:  @file sbque.h
williamr@2:  @publishedAll
williamr@2:  @released
williamr@2: */
williamr@2: 
williamr@2: #ifndef __SBQUE_H__
williamr@2: #define __SBQUE_H__
williamr@2: 
williamr@2: #include "tcpseq.h"
williamr@2: 
williamr@2: /** Sequence Block.
williamr@2: @publishedAll
williamr@2: @released
williamr@2: */
williamr@2: class SequenceBlock
williamr@2: 	{
williamr@2:   	friend class SequenceBlockQueue;
williamr@2: 
williamr@2: private:
williamr@2: 
williamr@2:     SequenceBlock(TTcpSeqNum aLeft, TTcpSeqNum aRight) : iLeft(aLeft), iRight(aRight) {}
williamr@2:     TDblQueLink iLink;
williamr@2: 
williamr@2: public:
williamr@2: 
williamr@2:     TTcpSeqNum  iLeft;
williamr@2:     TTcpSeqNum  iRight;
williamr@2: 	};
williamr@2: 
williamr@2: /** Sequence Block Queue.
williamr@2: @publishedAll
williamr@2: @released
williamr@2: */
williamr@2: class SequenceBlockQueue : public TDblQue<SequenceBlock>
williamr@2: 	{
williamr@2:  public:
williamr@2:     SequenceBlockQueue() : TDblQue<SequenceBlock>(_FOFF(SequenceBlock, iLink)) { iCount = 0; iOrdered = ETrue; }
williamr@2:     inline ~SequenceBlockQueue() { Clear(); }
williamr@2:     IMPORT_C SequenceBlock *AddOrdered(TTcpSeqNum aLeft, TTcpSeqNum aRight);
williamr@2:     IMPORT_C SequenceBlock *AddUnordered(TTcpSeqNum aLeft, TTcpSeqNum aRight);
williamr@2:     inline SequenceBlock *AddOrdered(const SequenceBlock *aBlock) { return AddOrdered(aBlock->iLeft, aBlock->iRight); }
williamr@2:     inline SequenceBlock *AddUnordered(const SequenceBlock *aBlock) { return AddUnordered(aBlock->iLeft, aBlock->iRight); }
williamr@2:     IMPORT_C SequenceBlock *Find(TTcpSeqNum aSeq);
williamr@2:     IMPORT_C TInt FindGap(TTcpSeqNum& aLeft, TTcpSeqNum& aRight);
williamr@2:     IMPORT_C void Prune(TTcpSeqNum aLeft);
williamr@2:     IMPORT_C void Limit(TInt aCount);
williamr@2:     IMPORT_C void Clear();
williamr@2:     inline TInt Count() const { return iCount; }
williamr@2:     inline TInt ByteCount() const { return iBytes; }
williamr@2: 
williamr@2: private:
williamr@2:     TInt iCount;
williamr@2:     TInt iBytes;
williamr@2:     TBool iOrdered;
williamr@2: 	};
williamr@2: 
williamr@2: typedef TDblQueIter<SequenceBlock> SequenceBlockQueueIter;
williamr@2: 
williamr@2: #endif