systemswstubs/examplecommonisc/IscDriver/src/IscChannelContainer.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 14 Jan 2010 07:14:53 +0200
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/*
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* Copyright (c) 2005 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:  An example implementation for ISC Driver Reference
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*
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*/
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// INCLUDE FILES
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#include <kernel.h>
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#include <IscDefinitions.h>
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#include "IscChannel.h"
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#include "IscChannelContainer.h"
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#include "IscTrace.h"
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#ifdef __WINS__
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#include <windows.h>
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#endif
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// EXTERNAL DATA STRUCTURES
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// EXTERNAL FUNCTION PROTOTYPES  
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// CONSTANTS
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const TInt KChannelComplitionDfcPriority( 2 );
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// MACROS
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// LOCAL CONSTANTS AND MACROS
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DIscChannel* IscChannelContainer::iIscChannels[KIscNumberOfUnits][KIscMaxNumberOfChannelSharers];
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TDfc* IscChannelContainer::iDfc = NULL;
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// MODULE DATA STRUCTURES
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// LOCAL FUNCTION PROTOTYPES
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// FORWARD DECLARATIONS
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#ifdef __WINS__
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CRITICAL_SECTION g_IscCriticalSection;
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#endif
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// ============================ MEMBER FUNCTIONS ===============================
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// -----------------------------------------------------------------------------
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// IscChannelContainer::SetChannel
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// Set pointer to channel
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// ( other items were commented in a header ).
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// -----------------------------------------------------------------------------
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//
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EXPORT_C TInt IscChannelContainer::SetChannel( 
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    DIscChannel* aChannel,
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    const TUint16 aUnit )
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    {
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    C_TRACE( ( _T( "IscChannelContainer::SetChannel(0x%x, 0x%x)" ), aChannel, aUnit ) );
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    TInt error( KErrNoMemory );
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    //check values
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    if ( aUnit < KIscNumberOfUnits )
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        {
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        for ( TInt i( 0 ); i < KIscMaxNumberOfChannelSharers; i++ )
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            {
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            if ( !iIscChannels[aUnit][i] )
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                {
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                iIscChannels[aUnit][i] = aChannel;
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                error = KErrNone;
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                break;
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                }
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            }
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        }
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    else
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        {
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        ASSERT_RESET_ALWAYS( 0, "IscDriver",EIscPanicSetChannel );
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        }
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    C_TRACE( ( _T( "IscChannelContainer::SetChannel - return 0x%x" ), error ) );
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    return error;    
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    }
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// -----------------------------------------------------------------------------
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// IscChannelContainer::Channel
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// Return pointer to channel
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// ( other items were commented in a header ).
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// -----------------------------------------------------------------------------
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//
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DIscChannel* IscChannelContainer::Channel( 
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    const TUint16 aChannel, 
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    const TUint16 aChannelSharingIndex )    
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    {
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    TRACE_ASSERT( aChannel < KIscNumberOfUnits );
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    TRACE_ASSERT( aChannelSharingIndex < KIscMaxNumberOfChannelSharers );
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    return( iIscChannels[ aChannel ][ aChannelSharingIndex ] );    
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    }
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// -----------------------------------------------------------------------------
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// IscChannelContainer::RemoveChannel
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// 
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// ( other items were commented in a header ).
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// -----------------------------------------------------------------------------
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//
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TInt IscChannelContainer::RemoveChannel
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		( 
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    	DIscChannel* aChannel
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    	)
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    {
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    TRACE_ASSERT( aChannel );
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    C_TRACE( ( _T( "IscChannelContainer::RemoveChannel(0x%x)" ), aChannel ) );
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    TUint16 channelNumber = aChannel->GetChannelNumber();
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   122
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    TInt error( KErrNotFound );
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    for ( TInt i( KErrNone ); ( i < KIscMaxNumberOfChannelSharers ) && ( KErrNone != error ); i++ )
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        {
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        if ( iIscChannels[channelNumber][i] == aChannel )
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            {
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            iIscChannels[channelNumber][i] = NULL;
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            error = KErrNone;
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            }
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        }
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    C_TRACE( ( _T( "IscChannelContainer::RemoveChannel - return %d" ), error ) );
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    return error;
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    }
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// -----------------------------------------------------------------------------
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// IscChannelContainer::ChannelComplition
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// Goes through channels and open ones are emptied
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// ( other items were commented in a header ).
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// -----------------------------------------------------------------------------
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//
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void IscChannelContainer::ChannelComplition( 
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    TAny* /*a*/ )
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    {
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    C_TRACE( ( _T( "IscChannelContainer::ChannelComplition()" ) ) );
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#ifdef __WINS__
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    EnterCriticalSection( &g_IscCriticalSection );
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#endif
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    DIscChannel* channelPtr = NULL;
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    for ( TUint16 channel( KIscFirstChannel ) ; channel < KIscNumberOfUnits; channel++ )
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        {
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        for ( TUint16 i( 0 ); i < KIscMaxNumberOfChannelSharers; i++ )
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            {
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            channelPtr = iIscChannels[channel][i];
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            if ( channelPtr )
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                {
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                channelPtr->EmptyBuffers();
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                }
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            }
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        }
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#ifdef __WINS__
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    LeaveCriticalSection( &g_IscCriticalSection );
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#endif
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    C_TRACE( ( _T( "IscChannelContainer::ChannelComplition - return 0x%x" ), KErrNone ) );
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    }
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// -----------------------------------------------------------------------------
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// IscChannelContainer::AddDfc
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// Adds ChannelComplition Dfc
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// ( other items were commented in a header ).
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// -----------------------------------------------------------------------------
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//
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void IscChannelContainer::AddDfc()
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    {
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    C_TRACE( ( _T( "IscChannelContainer::AddDfc()" ) ) );
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    if ( NKern::CurrentContext() == NKern::EInterrupt )
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        {
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        iDfc->Add();
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        }
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    else
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        {
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        iDfc->Enque();
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        }    
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    }
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// -----------------------------------------------------------------------------
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// IscChannelContainer::Initialize
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// Allocates Dfc function dynamically and formats data tables.
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// ( other items were commented in a header ).
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// -----------------------------------------------------------------------------
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//
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void IscChannelContainer::Initialize()
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    {    
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    C_TRACE( ( _T( "IscChannelContainer::Initialize()" ) ) );
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   203
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    if ( !iDfc )
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        {
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        iDfc = new TDfc( IscChannelContainer::ChannelComplition, NULL, Kern::DfcQue0(),
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                         KChannelComplitionDfcPriority );
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        ASSERT_RESET_ALWAYS( iDfc, "IscDriver",EIscMemoryAllocationFailure );
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        }
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    for ( TUint16 channel( 0 ); channel < KIscNumberOfUnits; channel++ )
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        {
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        for ( TUint16 i( 0 ); i < KIscMaxNumberOfChannelSharers; i++ )
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            {
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            iIscChannels[channel][i] = NULL;
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            }
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        }
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#ifdef __WINS__
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    InitializeCriticalSection( &g_IscCriticalSection );
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#endif
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    }
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// -----------------------------------------------------------------------------
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// IscChannelContainer::DeActivate
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// Deallocates Dfc function
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// ( other items were commented in a header ).
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// -----------------------------------------------------------------------------
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//
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void IscChannelContainer::DeActivate()
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    {    
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    if ( iDfc )
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        {
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        delete iDfc;
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        iDfc = NULL;
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        }
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#ifdef __WINS__
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    DeleteCriticalSection( &g_IscCriticalSection );
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#endif
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    }
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// -----------------------------------------------------------------------------
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// IscChannelContainer::ValidateChannel
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// 
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//
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TInt IscChannelContainer::ValidateChannel( 
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    DIscChannel* aChannelPtr )
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    {
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    C_TRACE( ( _T( "IscChannelContainer::ValidateChannel(0x%x)" ), aChannelPtr ) );
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    TInt error( KErrNotFound );
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    if( !aChannelPtr )
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    	{
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    	C_TRACE( ( _T( "IscChannelContainer::ValidateChannel aChannelPtr was NULL" ) ) );
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    	error = KErrArgument;	
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    	}
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    else
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    	{
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	    for ( TUint16 channelNumber( 0 ); channelNumber < KIscNumberOfUnits ; channelNumber++ )
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	        {
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	        for ( TInt i( KErrNone ); i < KIscMaxNumberOfChannelSharers ; i++ )
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	            {
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	            if ( iIscChannels[channelNumber][i] == aChannelPtr )
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	                {
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	                error = KErrNone;
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	                break;
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	                }
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	            }
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	        }    		
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    	}
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    C_TRACE( ( _T( "IscChannelContainer::ValidateChannel - return %d" ), error ) );
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    return error;
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    }
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//  End of File