sensorservices/sensorserver/src/client/sensrvdatahandler.cpp
author Tapani Kanerva <Tapani.Kanerva@nice.fi>
Thu, 11 Nov 2010 14:35:29 +0000
branchRCL_3
changeset 86 79105dd92dc2
parent 0 4e1aa6a622a0
permissions -rw-r--r--
Export meaningful default HWRM policy files, to fix Bug 3852
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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* Copyright (c) 2006-2008 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:  CSensrvDataHandler implementation
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*
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*/
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#include "sensrvdatahandler.h"
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#include "sensrvtrace.h"
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#include "sensrvdatahandlerobserver.h"
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#include "sensrvdefines.h"
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// ======== MEMBER FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// C++ constructor
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// ---------------------------------------------------------------------------
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//
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CSensrvDataHandler::CSensrvDataHandler( RSensrvClient& aSensrvClient, 
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                                        const TSensrvChannelInfo& aChannelInfo )
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    : CActive( EPriorityStandard ), 
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      iSensrvClient( aSensrvClient ), 
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      iChannelInfo( aChannelInfo )
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    {
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    CActiveScheduler::Add( this );
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    }
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// ---------------------------------------------------------------------------
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// 2nd phase of construction
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// ---------------------------------------------------------------------------
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//
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void CSensrvDataHandler::ConstructL()
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    {
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    }
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// ---------------------------------------------------------------------------
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// 2-phase constructor
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// ---------------------------------------------------------------------------
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//
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CSensrvDataHandler* CSensrvDataHandler::NewL( RSensrvClient& aSensrvClient, 
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                                        const TSensrvChannelInfo& aChannelInfo )
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    {
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    CSensrvDataHandler* self = CSensrvDataHandler::NewLC( aSensrvClient, aChannelInfo );
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    CleanupStack::Pop( self );
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// 2-phase constructor
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// ---------------------------------------------------------------------------
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//
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CSensrvDataHandler* CSensrvDataHandler::NewLC( RSensrvClient& aSensrvClient, 
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                                        const TSensrvChannelInfo& aChannelInfo )
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    {
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    CSensrvDataHandler* self = new( ELeave ) CSensrvDataHandler( aSensrvClient, aChannelInfo );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// Destructor
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// ---------------------------------------------------------------------------
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//
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CSensrvDataHandler::~CSensrvDataHandler()
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    {
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    Cancel();
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    delete iWriteBuffer;
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    delete iWriteBufferPtr;
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    delete iReadBuffer;
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    }
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// ---------------------------------------------------------------------------
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// From class CActive
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// ---------------------------------------------------------------------------
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//
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void CSensrvDataHandler::DoCancel()
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    {
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::DoCancel()" ) ) );
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    iSensrvClient.SendReceiveSync( ESensrvSrvReqStopListening, 
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                                        TIpcArgs( iChannelInfo.iChannelId ) );
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::DoCancel - return void" ) ) );
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    }
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// ---------------------------------------------------------------------------
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// From class CActive
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// ---------------------------------------------------------------------------
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//
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void CSensrvDataHandler::RunL()
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    {
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::RunL - iStatus %d" ), iStatus.Int() ) );
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	Deque();
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	CActiveScheduler::Add(this);
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    if( iStatus.Int() == KErrNone )
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        {
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        if( iErrorCount > 0 )
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            {
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            iErrorCount = 0;
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            }
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        HBufC8* temp = iReadBuffer;
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        iReadBuffer = iWriteBuffer;
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        iWriteBuffer = temp;    
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        TSensrvAsyncChannelDataCountsRetval dataCounts = iDataCountsPckgBuf();
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        COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::RunL - DataItemCount = %d, DataLostCount = %d "), dataCounts.iDataItemCount, dataCounts.iDataLostCount ) );
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        TInt lostCount( dataCounts.iDataLostCount );
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        lostCount += ( iReadBufferCount - iGetDataCount );
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        // Reset buffer counts
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        iReadBufferCount = dataCounts.iDataItemCount;
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        iGetDataCount = 0; 
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        CreateAndSendRequest();
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        // Notify to listener
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        iDataObserver->DataReceived( iReadBufferCount, lostCount );
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        }
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    else
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        {
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        if( iErrorCount == 0 )
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            {
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            iErrorCount++;
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            CreateAndSendRequest();
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            // Send minor error
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            iDataObserver->DataError( ESensrvErrorSeverityMinor );
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            }
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        else if( iErrorCount == 1 )
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            {
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            iErrorCount++;
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            // Reopen channel
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            TInt maxBufferCount(0);
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            iDataObserver->ReopenChannelForDataListeningL( maxBufferCount );
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            TSensrvStartListeningParametersPckgBuf startListeningPckg( iListeningParameters );
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            COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::RunL - Restart listening - iDesiredBufferingCount = %d, iMaximumBufferingCount = %d, iBufferingPeriod = %d "), 
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                iListeningParameters.iDesiredBufferingCount, 
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                iListeningParameters.iMaximumBufferingCount, 
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                iListeningParameters.iBufferingPeriod ) );
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            TInt err = iSensrvClient.SendReceiveSync( ESensrvSrvReqStartListening, 
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                            TIpcArgs( iChannelInfo.iChannelId, &startListeningPckg ) );
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            if( err )
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                {
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                // send fatal error
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                iDataObserver->DataError( ESensrvErrorSeverityFatal );                    
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                }
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            else
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                {
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                TInt newMaxSize( maxBufferCount * iChannelInfo.iDataItemSize );
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                if( iWriteBuffer->Length() > newMaxSize )
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                    {
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                    iWriteBuffer->ReAllocL( newMaxSize );
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                    iReadBuffer->ReAllocL( newMaxSize );
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                    delete iWriteBufferPtr;
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                    iWriteBufferPtr = NULL;
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                    iWriteBufferPtr = new (ELeave) TPtr8( const_cast<TUint8*>( iWriteBuffer->Des().Ptr() ), newMaxSize );
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                    }
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                // Start listening
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                CreateAndSendRequest();
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                }
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            }
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        else
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            {
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            // send fatal error
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            iDataObserver->DataError( ESensrvErrorSeverityFatal );  
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            }
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        }
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    }
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// ---------------------------------------------------------------------------
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// CSensrvDataHandler::RunError
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// ---------------------------------------------------------------------------
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//
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TInt CSensrvDataHandler::RunError( TInt /*aError*/ )
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    {
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::RunError" ) ) );
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    // send fatal error
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    iDataObserver->DataError( ESensrvErrorSeverityFatal );
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    return KErrNone;
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    }
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   217
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   218
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// ---------------------------------------------------------------------------
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// CSensrvDataHandler::StartListening
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// ---------------------------------------------------------------------------
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//
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void CSensrvDataHandler::StartListeningL( MSensrvDataHandlerObserver* aDataObserver, 
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                                TSensrvStartListeningParameters aListeningParameters,
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                                TInt aMaxBufferCount )
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    {
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::StartListening - Start" ) ) );
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    if( IsActive() )
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        {
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        COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::StartListening - Return" ) ) );
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        return;
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        }
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    iDataObserver = aDataObserver;
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    iListeningParameters = aListeningParameters;
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    iErrorCount = 0;
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    TInt size = iListeningParameters.iMaximumBufferingCount * iChannelInfo.iDataItemSize;
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    // Check size
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    if( size <= 0 || iListeningParameters.iMaximumBufferingCount > ( KMaxTInt / iChannelInfo.iDataItemSize )
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        || iListeningParameters.iMaximumBufferingCount < iListeningParameters.iDesiredBufferingCount 
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        || iListeningParameters.iMaximumBufferingCount > aMaxBufferCount )
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        {
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        size = aMaxBufferCount * iChannelInfo.iDataItemSize;
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        }
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::StartListening - bufferSize: %d" ), size ) );
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    delete iWriteBuffer;
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    iWriteBuffer = NULL;
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    iWriteBuffer = HBufC8::NewL( size );
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    delete iReadBuffer;
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    iReadBuffer = NULL;
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    iReadBuffer = HBufC8::NewL( size );
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   256
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    delete iWriteBufferPtr;
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    iWriteBufferPtr = NULL;
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    iWriteBufferPtr = new (ELeave) TPtr8( const_cast<TUint8*>( iWriteBuffer->Des().Ptr() ), size );
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    CreateAndSendRequest();
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::StartListening - Return" ) ) );
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    }
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// ---------------------------------------------------------------------------
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// CSensrvDataHandler::GetData
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// ---------------------------------------------------------------------------
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//
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TInt CSensrvDataHandler::GetData( TDes8& aDataPtr )
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    {
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::GetData - Start" ) ) );
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    TInt err( KErrNone );
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    if( aDataPtr.Length() < iChannelInfo.iDataItemSize )
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        {
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        // aDataPtr is too small
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        err = KErrOverflow;
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        }
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    else if( iGetDataCount >= iReadBufferCount || !iReadBuffer )
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        {
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        // data not found.
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        err = KErrNotFound;
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        }
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    else
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        {
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        // set data
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        TUint8* ptr = const_cast<TUint8*>( iReadBuffer->Des().Ptr() );
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        ptr += ( iGetDataCount * iChannelInfo.iDataItemSize ); 
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        aDataPtr.Copy( ptr, iChannelInfo.iDataItemSize );
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        ++iGetDataCount;
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        }
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::GetData - Return %d" ), err ) );
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    return err;
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    }
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// ---------------------------------------------------------------------------
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// CSensrvDataHandler::CreateAndSendRequestL
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// ---------------------------------------------------------------------------
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//
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void CSensrvDataHandler::CreateAndSendRequest()
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    {
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::CreateAndSendRequestL - Start" ) ) );
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   307
    
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    iWriteBufferPtr->Set( iWriteBuffer->Des() );
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    iSensrvClient.SendReceiveAsync( ESensrvSrvReqAsyncChannelData, 
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            TIpcArgs( iChannelInfo.iChannelId, iWriteBufferPtr, &iDataCountsPckgBuf ), iStatus );
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    SetActive();
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    COMPONENT_TRACE( ( _L( "Sensrv Client - CSensrvDataHandler::CreateAndSendRequestL - Return" ) ) );
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    }
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parents:
diff changeset
   317