1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Writes to socket.

    15 *

    16 */

    17 

    18 

    19 #ifndef __SOCKETSWRITER_H__

    20 #define __SOCKETSWRITER_H__

    21 

    22 // INCLUDES

    23 #include <in_sock.h>

    24 #include "timeoutnotifier.h"

    25 

    26 // FORWARD DECLARATIONS

    27 class CTimeOutTimer;

    28 class MSocketObserver;

    29 

    30 const TInt KSocketWriteBufferSize = 1024;

    31 const TInt KTransferBufferSize = 8 * 1024;

    32 

    33 // CLASS DECLARATION

    34 class CSocketsWriter : public CActive, public MTimeOutNotifier

    35     {

    36     public:

    37 

    38         static CSocketsWriter* NewL( MSocketObserver& aEngineNotifier,

    39                                      RSocket& aSocket );

    40         virtual ~CSocketsWriter();

    41 

    42         /**

    43          * Add data to iTransferBuffer and start sending if not already sending

    44          * Leaves with KErrOverflow, if there is not enough free space.

    45          * This can be called as long as there is space in buffer.

    46          */

    47         void SendL(const TDesC8& aData);

    48 

    49         void CancelSending();

    50 

    51         /**

    52         * Return number of bytes that can be added to iTransferBuffer.

    53         */

    54         TInt FreeSpaceInSendBuffer();

    55 

    56         TInt SendBufferMaxSize();

    57 

    58     protected: // from CActive

    59 

    60         void DoCancel();

    61         void RunL();

    62 

    63     protected: // from MTimeOutNotifier

    64 

    65         void TimerExpired();

    66 

    67     private: // Constructors and destructors

    68 

    69         CSocketsWriter( MSocketObserver& aEngineNotifier, RSocket& aSocket );

    70         void ConstructL();

    71 

    72     private: // New functions

    73 

    74         void SendNextPacket();

    75 

    76     private: // Enumerations

    77 

    78         enum TWriteState

    79             {

    80             ESending,

    81             EIdle // nothing to be sent

    82             };

    83 

    84     private: // Data

    85 

    86         RSocket& iSocket;

    87         MSocketObserver& iObserver;

    88         TBuf8<KTransferBufferSize> iTransferBuffer;

    89         TBuf8<KSocketWriteBufferSize> iWriteBuffer;

    90         CTimeOutTimer* iTimer;

    91         TInt iTimeOut; // microseconds

    92         TWriteState iWriteStatus;

    93     };

    94 

    95 #endif // __SOCKETSWRITER_H__

    96 

    97 // End of File