/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   Shutdown watcher implementation

*

*/

#include "ShutdownWatcher.h"

#include <startupdomainpskeys.h>

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// CShutdownWatcher::NewL

// ---------------------------------------------------------------------------

//

CShutdownWatcher* CShutdownWatcher::NewL( MShutdownObserver& aObserver )

    {

    CShutdownWatcher* self = new(ELeave) CShutdownWatcher( aObserver );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// CShutdownWatcher::~CShutdownWatcher

// ---------------------------------------------------------------------------

//

CShutdownWatcher::~CShutdownWatcher()

    {

    Cancel();

    iProperty.Close();

    }

// ---------------------------------------------------------------------------

// CShutdownWatcher::Start

// ---------------------------------------------------------------------------

//

void CShutdownWatcher::Start()

    {

    TInt status( 0 );

    TInt err = iProperty.Get( KPSUidStartup, KPSGlobalSystemState, status );

    if( err == KErrNone )

        {

        if( status == ESwStateShuttingDown )

            {

            iObserver.NotifyShuttingDown();

            return;     // that was all, system is already going down

            }

        }

    IssueRequest();

    }

// ---------------------------------------------------------------------------

// CShutdownWatcher::IssueRequest

// ---------------------------------------------------------------------------

//

void CShutdownWatcher::IssueRequest()

    {

    if( !IsActive() )

        {

        iProperty.Subscribe( iStatus );

        SetActive();

        }

    }

// ---------------------------------------------------------------------------

// CShutdownWatcher::DoCancel

// ---------------------------------------------------------------------------

//

void CShutdownWatcher::DoCancel()

    {

    iProperty.Cancel();

    }

// ---------------------------------------------------------------------------

// CShutdownWatcher::RunL()

// ---------------------------------------------------------------------------

//

void CShutdownWatcher::RunL()

    {

    IssueRequest();

    TInt status( 0 );

    iProperty.Get( status );

    if( status == ESwStateShuttingDown )

        {

        iObserver.NotifyShuttingDown();

        Cancel();   // that was all, no other notifications needed

        }

    }

// ---------------------------------------------------------------------------

// CShutdownWatcher::CShutdownWatcher

// ---------------------------------------------------------------------------

//

CShutdownWatcher::CShutdownWatcher( MShutdownObserver& aObserver )

    : CActive( EPriorityStandard ), iObserver( aObserver )

    {

    }

// ---------------------------------------------------------------------------

// CShutdownWatcher::ConstructL()

// ---------------------------------------------------------------------------

//

void CShutdownWatcher::ConstructL()

    {

    TInt err = iProperty.Attach( KPSUidStartup, KPSGlobalSystemState );

    User::LeaveIfError( err );

    CActiveScheduler::Add( this );

    }

// End of file