1 // Copyright (c) 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: Comms buffer queue

    14 //

    15 

    16 #ifndef __COMMSBUFQ_H__

    17 #define __COMMSBUFQ_H__

    18 

    19 #include <e32base.h>

    20 #include <comms-infras/commsbufchain.h>

    21 class RCommsBuf;

    22 class RCommsBufChain;

    23 

    24 /**

    25 A linked list of RCommsBuf

    26 

    27 Note: Currently the class is tagged as internal technology. In order to move this class

    28 to other categories a detailed analysis of APIs to be conducted

    29 

    30 @internalTechnology

    31 */

    32 class RCommsBufQ

    33 	{

    34 	friend class CSystemSharedBufPool;

    35 	__DECLARE_CLEANUP

    36 public:

    37 	inline RCommsBufQ();

    38 	IMPORT_C RCommsBufQ(RCommsBuf* aChain);

    39 

    40 	inline RCommsBufQ(RCommsBuf* aFirst, RCommsBuf* aLast);

    41 

    42 	inline TBool IsEmpty();

    43 

    44 	inline RCommsBuf* First();

    45 

    46 	inline RCommsBuf* Last();

    47 

    48 	IMPORT_C void Init();

    49 	IMPORT_C void Assign(RCommsBufQ& aQueue);

    50 	IMPORT_C void Assign(RCommsBufChain& aChain);

    51 	IMPORT_C void Append(RCommsBuf* aBuf);

    52 	IMPORT_C void Append(RCommsBufQ& aQueue);

    53 	IMPORT_C void Append(RCommsBufChain& aChain);

    54 	IMPORT_C void Prepend(RCommsBuf* aBuf);

    55 	IMPORT_C void Prepend(RCommsBufQ& aQueue);

    56 	IMPORT_C void Prepend(RCommsBufChain& aChain);

    57 	IMPORT_C RCommsBuf* Remove();

    58 	IMPORT_C void Free();

    59 

    60 	protected:

    61 	RCommsBuf* iNext;

    62 	RCommsBuf* iLast;

    63 

    64 	protected:

    65 	IMPORT_C TInt Transfer(RCommsBufQ& aQueue, TInt aSize, TInt aBufSize, TInt& aCount);

    66 	IMPORT_C RCommsBuf* RemoveLast();

    67 	};

    68 

    69 #include <comms-infras/commsbufq.inl>

    70 #endif // __COMMSBUFQ_H__

    71 

    72 

    73 

    74