commonservices/PlatformEnv/disknotifyhandler/src/diskwatcher.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Sat, 20 Feb 2010 00:05:00 +0200
branchRCL_3
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parent 0 4e1aa6a622a0
permissions -rw-r--r--
Revision: 201003 Kit: 201007
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/*
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* Copyright (c) 2007 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:  Class for notify disk watcher
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*
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*/
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//  INCLUDES
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#include <e32std.h>
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#include <f32file.h>
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#include <driveinfo.h>
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#include "diskwatcher.h"
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#include "disknotifyhandler.h"
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#include "disknotifyhandlerdebug.h"
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// ======== LOCAL FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// SetEvent
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// ---------------------------------------------------------------------------
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//
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inline static void SetEvent(
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        MDiskNotifyHandlerCallback::TDiskEvent& aEvent,
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        MDiskNotifyHandlerCallback::TDiskEventType aType,
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        TInt aDrive,
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        const TDriveInfo& aInfo,
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        const TDriveInfo& aPrevInfo )
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    {
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    aEvent.iType = aType;
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    aEvent.iDrive = aDrive;
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    aEvent.iInfo = aInfo;
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    aEvent.iPrevInfo = aPrevInfo;
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    }
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// ---------------------------------------------------------------------------
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// SetEmptyDriveInfo
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// ---------------------------------------------------------------------------
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//
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inline static void SetEmptyDriveInfo( TDriveInfo& aInfo )
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    {
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    aInfo.iType = EMediaNotPresent;
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    aInfo.iBattery = EBatNotSupported;
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    aInfo.iDriveAtt = 0;
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    aInfo.iMediaAtt = 0;
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    }
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// ======== MEMBER FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// CDiskWatcher::CDiskWatcher
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// ---------------------------------------------------------------------------
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//
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CDiskWatcher::CDiskWatcher(
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        MDiskNotifyHandlerCallback& aCallback,
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        RFs& aFs ) :
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    CDiskWatcherBase( aCallback, aFs )
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    {
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    FUNC_LOG
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    }
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// ---------------------------------------------------------------------------
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// CDiskWatcher::ConstructL
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::ConstructL()
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    {
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    FUNC_LOG
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    Activate();
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    RFs& fs( Fs() );
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    TDriveList drvList;
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    User::LeaveIfError( fs.DriveList( drvList, KDriveAttAll ) );
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    TInt count( Min( drvList.Length(), iInfoList.Count() ) );
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    for ( TInt i( 0 ); i < count; ++i )
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        {
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        if ( drvList[ i ] )
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            {
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            iInfoList[ i ].Read( fs, i );
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            }
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        }
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    }
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// ---------------------------------------------------------------------------
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// CDiskWatcher::NewL
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// ---------------------------------------------------------------------------
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//
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CDiskWatcher* CDiskWatcher::NewL(
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        MDiskNotifyHandlerCallback& aCallback,
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        RFs& aFs )
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    {
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    FUNC_LOG
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    CDiskWatcher* self = new ( ELeave ) CDiskWatcher( aCallback, aFs );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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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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// CDiskWatcher::~CDiskWatcher
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// ---------------------------------------------------------------------------
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//
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CDiskWatcher::~CDiskWatcher()
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    {
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    FUNC_LOG
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    Cancel();
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    }
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// ---------------------------------------------------------------------------
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// CDiskWatcher::WatcherError
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::WatcherError(
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        TInt aError,
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        const TBool& /*aKilled*/ )
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    {
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    FUNC_LOG
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    LOG_IF_ERROR1( aError, "CDiskWatcher::WatcherError-aError=%d",
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        aError )
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    MDiskNotifyHandlerCallback::TDiskEvent event;
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    TDriveInfo emptyDrvInfo;
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    SetEmptyDriveInfo( emptyDrvInfo );
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   143
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    SetEvent(
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        event,
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        MDiskNotifyHandlerCallback::EDiskError,
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        KErrNotFound,
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        emptyDrvInfo,
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        emptyDrvInfo );
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    Callback().HandleNotifyDisk( aError, event );
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    }
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   153
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// ---------------------------------------------------------------------------
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// CDiskWatcher::ReactivateWatcher
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::ReactivateWatcher()
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    {
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    FUNC_LOG
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   161
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    Activate();
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    }
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// ---------------------------------------------------------------------------
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// CDiskWatcher::RunWatcher
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::RunWatcher( const TBool& aKilled )
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    {
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    FUNC_LOG
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    RFs& fs( Fs() );
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    MDiskNotifyHandlerCallback& callback( Callback() );
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   175
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    TDriveList drvList;
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    TInt err( fs.DriveList( drvList, KDriveAttAll ) );
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    if ( err != KErrNone )
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        {
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        ERROR_LOG1( "CDiskWatcher::RunWatcher-err1=%d", err )
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        return;
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        }
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   183
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    TInt count( Min( drvList.Length(), iInfoList.Count() ) );
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    TDriveInfo emptyDrvInfo;
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    SetEmptyDriveInfo( emptyDrvInfo );
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    MDiskNotifyHandlerCallback::TDiskEvent event;
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    TWatcherInfo newInfo;
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   189
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    for( TInt i( 0 ); i < count; ++i )
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        {
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        TWatcherInfo& info( iInfoList[ i ] );
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        if ( !drvList[ i ] && info.iDriveStatus )
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            {
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            INFO_LOG1( "CDiskWatcher::RunWatcher-Drive %d removed", i )
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   196
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            // Inform drives removed from drive list
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            SetEvent(
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                event,
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                MDiskNotifyHandlerCallback::EDiskRemoved,
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                i,
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                emptyDrvInfo,
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                info.iDriveInfo );
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   204
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            callback.HandleNotifyDisk( KErrNone, event );
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            if ( aKilled )
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                {
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                return; // Deleted from callback
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                }
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            info.Reset(); // Set to empty
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            }
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        else if ( drvList[ i ] && !info.iDriveStatus )
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            {
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            INFO_LOG1( "CDiskWatcher::RunWatcher-Drive %d added", i )
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   215
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            // Inform drives added to drive list
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            info.Read( fs, i );
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            if ( info.iDriveStatus )
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                {
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                SetEvent(
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                    event,
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                    MDiskNotifyHandlerCallback::EDiskAdded,
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                    i,
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                    info.iDriveInfo,
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                    emptyDrvInfo );
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                callback.HandleNotifyDisk( KErrNone, event );
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                if ( aKilled )
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                    {
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                    return;  // Deleted from callback
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                    }
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                }
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            }
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        else if ( drvList[ i ] && info.iDriveStatus )
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            {
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            // Inform drive status changes
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            newInfo.Read( fs, i );
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            if ( info.IsChanged( newInfo ) )
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                {
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                INFO_LOG1( "CDiskWatcher::RunWatcher-Drive %d changed", i )
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                SetEvent(
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                    event,
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                    MDiskNotifyHandlerCallback::EDiskStatusChanged,
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                    i,
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                    newInfo.iDriveInfo,
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                    info.iDriveInfo );
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                callback.HandleNotifyDisk( KErrNone, event );
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                if ( aKilled )
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                    {
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                    return; // Deleted from callback
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                    }
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                info = newInfo; // Save changed info
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                }
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            }
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        }
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    }
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// ---------------------------------------------------------------------------
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// CDiskWatcher::CancelWatcher
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::CancelWatcher()
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    {
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    FUNC_LOG
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    Fs().NotifyChangeCancel( iStatus );
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    }
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// ---------------------------------------------------------------------------
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// CDiskWatcher::Activate
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::Activate()
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    {
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    FUNC_LOG
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    if ( !IsActive() )
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        {
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        INFO_LOG( "CDiskWatcher::Activate" )
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        Fs().NotifyChange( ENotifyDisk, iStatus );
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        SetActive();
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        }
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    }
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// ---------------------------------------------------------------------------
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// CDiskWatcher::TWatcherInfo::Read
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::TWatcherInfo::Read( RFs& aFs, TInt aDrive )
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    {
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    FUNC_LOG
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    TInt err( aFs.Drive( iDriveInfo, aDrive ) );
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    LOG_IF_ERROR2( err, "CDiskWatcher::TWatcherInfo::Read-aDrive=%d,err1=%d",
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        aDrive, err )
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    if ( err == KErrNone )
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        {
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        // Needed for detecting USB mass storage mode transition
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        err = DriveInfo::GetDriveStatus( aFs, aDrive, iDriveStatus );
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        LOG_IF_ERROR2( err, "CDiskWatcher::TWatcherInfo::Read-aDrive=%d,err2=%d",
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            aDrive, err )
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        }
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    if ( err != KErrNone )
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        {
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        Reset();
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        }
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    INFO_LOG3(
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        "CDiskWatcher::TWatcherInfo::Read-Drive %d,Status 0x%x,Type %d",
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        aDrive, iDriveStatus, iDriveInfo.iType )
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    INFO_LOG3(
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        "CDiskWatcher::TWatcherInfo::Read-Drive %d,DriveAtt 0x%x,MediaAtt 0x%x",
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        aDrive, iDriveInfo.iDriveAtt, iDriveInfo.iMediaAtt )
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    }
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   316
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// ---------------------------------------------------------------------------
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// CDiskWatcher::TWatcherInfo::IsChanged
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// ---------------------------------------------------------------------------
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//
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TBool CDiskWatcher::TWatcherInfo::IsChanged(
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        const TWatcherInfo& aNewInfo ) const
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    {
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    FUNC_LOG
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   325
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    TBool ret( iDriveStatus != aNewInfo.iDriveStatus ||
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               iDriveInfo.iType != aNewInfo.iDriveInfo.iType ||
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               iDriveInfo.iDriveAtt != aNewInfo.iDriveInfo.iDriveAtt ||
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               iDriveInfo.iMediaAtt != aNewInfo.iDriveInfo.iMediaAtt );
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   330
    INFO_LOG3(
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        "CDiskWatcher::TWatcherInfo::IsChanged %d,Status 0x%x,NewStatus 0x%x",
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        ret, iDriveStatus, aNewInfo.iDriveStatus )
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    return ret;
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    }
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   335
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// ---------------------------------------------------------------------------
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// CDiskWatcher::TWatcherInfo::Reset
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// ---------------------------------------------------------------------------
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//
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void CDiskWatcher::TWatcherInfo::Reset()
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    {
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    FUNC_LOG
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    SetEmptyDriveInfo( iDriveInfo );
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    iDriveStatus = 0;
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    }
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// End of File