devencdiskutils/DevEncCommonUtils/src/DevEncDiskStatusObserver.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 16:04:40 +0300
branchRCL_3
changeset 21 09b1ac925e3f
parent 0 164170e6151a
permissions -rw-r--r--
Revision: 201033 Kit: 201035
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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: 
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*              Implements a watcher for disk status change events.   
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*
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*
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*/
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#include <e32base.h>
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#include <f32file.h>
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#include <DevEncEngineConstants.h>
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#include "DevEncDiskStatusObserver.h"
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#include "DevEncLog.h"
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#include "DevEncProtectedPSKey.h"
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EXPORT_C CDiskStatusObserver* CDiskStatusObserver::NewL( MDiskStatusObserver* aObserver, TDriveNumber aDriveNumber )
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    {
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    DFLOG( "CDiskStatusObserver::NewL" );
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    CDiskStatusObserver* self = new (ELeave) CDiskStatusObserver();
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    CleanupStack::PushL( self );
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    self->ConstructL( aObserver, aDriveNumber );
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    CleanupStack::Pop( self );
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    return self;
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    }
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void CDiskStatusObserver::ConstructL( MDiskStatusObserver* aObserver, TDriveNumber aDriveNumber )
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    {
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    DFLOG( "CDiskStatusObserver::ConstructL" );
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    TInt err = iNfeStatus.Attach( KEncUtility, ENC_KEY( aDriveNumber, KDEStatusToUiKey ) );
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    if ( err )
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        {
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        DFLOG2( "ERROR: Attach failed, err %d", err );
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        }
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    iObserver = aObserver;
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    iDrive = aDriveNumber;
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    CActiveScheduler::Add( this );
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    iNfeStatus.Subscribe( iStatus );
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    SetActive();
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    }
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CDiskStatusObserver::CDiskStatusObserver() : CActive( EPriorityIdle )
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    {
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    }
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CDiskStatusObserver::~CDiskStatusObserver()
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    {
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    DFLOG( "CDiskStatusObserver::~CDiskStatusObserver" );
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    Cancel();
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    iNfeStatus.Close();
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    }
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void CDiskStatusObserver::DoCancel()
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    {
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    DFLOG( "CDiskStatusObserver::DoCancel" );
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    iNfeStatus.Cancel();
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    }
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void CDiskStatusObserver::RunL()
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    {
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    DFLOG( "CDiskStatusObserver::RunL" );
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    iNfeStatus.Subscribe( iStatus );
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    SetActive();
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    TInt nfeStatus;
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    TInt err = iNfeStatus.Get( nfeStatus );
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    if( !err )
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        {
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        TInt status;
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        switch( nfeStatus )
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        	{
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        	case EDecrypting: status = EOpDecrypting;
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        		              break;
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        	case EEncrypting: status = EOpEncrypting;
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        		              break;
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        	default: status = EOpIdle;
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        		     break;
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            }
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        //if a multidrive encryption/decryption is ongoing we cannot change the status of the ps key until
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        //all the drives have concluded the operation. 
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        if( ( status == EOpIdle && !IsEncryptionOperationOngoing() ) || status != EOpIdle )
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            {
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            RProperty::Set( KDevEncProtectedUid, KDevEncOperationKey, status );
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            }
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        iObserver->DiskStatusChangedL( nfeStatus );
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        }
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    }
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TBool CDiskStatusObserver::IsEncryptionOperationOngoing()
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    {
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    DFLOG( "CDiskStatusObserver::IsEncryptionOperationOngoing" );
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    TBool ret( EFalse );
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    TBool cont( ETrue );
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    for( TInt i = EDriveA; ( i < KMaxDrives ) && cont; i++ )
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        {
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        TInt status;
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        TInt err = RProperty::Get( KEncUtility, ENC_KEY( (TDriveNumber) i, KDEStatusToUiKey ), status );
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        if( !err )
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            {
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            if( status == EDecrypting || status == EEncrypting )
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                {
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                DFLOG2( "drive %d has an encryption or decryption operation ongoing", i );
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            	ret = ETrue;
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            	cont = EFalse;
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                }
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            else
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                {
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                DFLOG2( "drive %d is in Idle", i );
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                }
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            }
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        else
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        	{
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        	DFLOG3( "ERROR: Get failed for drive %d, err %d", i, err );
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            }
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        }    
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    return ret;
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    }
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   131
// End of File