appinstaller/AppinstUi/Daemon/Src/ShutdownWatcher.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:51:10 +0200
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/*
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* Copyright (c) 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:   Shutdown watcher implementation
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*
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*/
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#include "ShutdownWatcher.h"
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#include <startupdomainpskeys.h>
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// ======== MEMBER FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// CShutdownWatcher::NewL
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// ---------------------------------------------------------------------------
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//
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CShutdownWatcher* CShutdownWatcher::NewL( MShutdownObserver& aObserver )
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    {
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    CShutdownWatcher* self = new(ELeave) CShutdownWatcher( aObserver );
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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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// CShutdownWatcher::~CShutdownWatcher
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// ---------------------------------------------------------------------------
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//
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CShutdownWatcher::~CShutdownWatcher()
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    {
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    Cancel();
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    iProperty.Close();
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    }
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// ---------------------------------------------------------------------------
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// CShutdownWatcher::Start
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// ---------------------------------------------------------------------------
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//
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void CShutdownWatcher::Start()
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    {
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    TInt status( 0 );
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    TInt err = iProperty.Get( KPSUidStartup, KPSGlobalSystemState, status );
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    if( err == KErrNone )
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        {
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        if( status == ESwStateShuttingDown )
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            {
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            iObserver.NotifyShuttingDown();
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            return;     // that was all, system is already going down
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            }
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        }
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    IssueRequest();
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    }
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// ---------------------------------------------------------------------------
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// CShutdownWatcher::IssueRequest
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// ---------------------------------------------------------------------------
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//
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void CShutdownWatcher::IssueRequest()
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    {
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    if( !IsActive() )
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        {
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        iProperty.Subscribe( iStatus );
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        SetActive();
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        }
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    }
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// ---------------------------------------------------------------------------
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// CShutdownWatcher::DoCancel
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// ---------------------------------------------------------------------------
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//
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void CShutdownWatcher::DoCancel()
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    {
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    iProperty.Cancel();
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    }
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// ---------------------------------------------------------------------------
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// CShutdownWatcher::RunL()
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// ---------------------------------------------------------------------------
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//
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void CShutdownWatcher::RunL()
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    {
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    IssueRequest();
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    TInt status( 0 );
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    iProperty.Get( status );
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    if( status == ESwStateShuttingDown )
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        {
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        iObserver.NotifyShuttingDown();
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        Cancel();   // that was all, no other notifications needed
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        }
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    }
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// ---------------------------------------------------------------------------
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// CShutdownWatcher::CShutdownWatcher
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// ---------------------------------------------------------------------------
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//
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CShutdownWatcher::CShutdownWatcher( MShutdownObserver& aObserver )
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    : CActive( EPriorityStandard ), iObserver( aObserver )
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    {
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    }
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// ---------------------------------------------------------------------------
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// CShutdownWatcher::ConstructL()
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// ---------------------------------------------------------------------------
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//
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void CShutdownWatcher::ConstructL()
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    {
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    TInt err = iProperty.Attach( KPSUidStartup, KPSGlobalSystemState );
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    User::LeaveIfError( err );
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    CActiveScheduler::Add( this );
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    }
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// End of file