usbengines/usbwatcher/src/cusbactivestate.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:14:30 +0200
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/*
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* Copyright (c) 2002-2009 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:  This implements CUsbActiveState class.
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*
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*/
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// INCLUDE FILES
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#include <usbman.h>
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#include "debug.h"
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#include "cusbactivestate.h"
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#include "cusbwatcher.h"
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// CONSTANTS
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const TUint KUsbAllStates = 0xFFFFFFFF;
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// ============================ MEMBER FUNCTIONS ==============================
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// ----------------------------------------------------------------------------
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// C++ default constructor can NOT contain any code, that might leave.
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// ----------------------------------------------------------------------------
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//
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CUsbActiveState::CUsbActiveState( RUsb& aUsbMan, CUsbWatcher& aOwner )
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    : CActive( EPriorityStandard )
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    , iUsbMan( aUsbMan )
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    , iOwner( aOwner )
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    , iPreviousState( EUsbDeviceStateUndefined )
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    {
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    LOG_FUNC
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    CActiveScheduler::Add( this );
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    }
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// ----------------------------------------------------------------------------
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// Symbian 2nd phase constructor can leave.
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// ----------------------------------------------------------------------------
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//
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void CUsbActiveState::ConstructL()
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    {
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    LOG_FUNC
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    LEAVEIFERROR( iUsbMan.GetDeviceState( iCurrentState ) );
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    LOG1( "Intial UsbDeviceState = %d" , iCurrentState );
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    // start USB if cable is pluged-in at bootup
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    if( EUsbDeviceStateUndefined != iCurrentState )
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        {
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        iOwner.StateChangeNotify( iPreviousState, iCurrentState );
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        iPreviousState = iCurrentState;
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        }
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    iUsbMan.DeviceStateNotification( KUsbAllStates, iCurrentState, iStatus );
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    SetActive();
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    }
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// ----------------------------------------------------------------------------
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// Two-phased constructor.
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// ----------------------------------------------------------------------------
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//
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CUsbActiveState* CUsbActiveState::NewL( RUsb& aUsbMan, CUsbWatcher& aOwner )
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    {
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    LOG_FUNC
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    CUsbActiveState* self = new ( ELeave ) CUsbActiveState( aUsbMan, aOwner );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop(); // pop self
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    return self;
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    }
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// Destructor
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CUsbActiveState::~CUsbActiveState()
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    {
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    LOG_FUNC
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    Cancel();
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    }
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// ----------------------------------------------------------------------------
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// This function is called when device state is changed.
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// ----------------------------------------------------------------------------
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//
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void CUsbActiveState::RunL()
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    {
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    LOG_FUNC
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    LEAVEIFERROR( iStatus.Int() ); // Close process if error happens here
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    LOG2( "DeviceState change: %d ==> %d", iPreviousState, iCurrentState );
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    TUsbDeviceState newState = iCurrentState;
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    iUsbMan.DeviceStateNotification( KUsbAllStates, iCurrentState,
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            iStatus );
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    SetActive();
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    iOwner.StateChangeNotify( iPreviousState, newState );
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    iPreviousState = newState;
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    }
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// ----------------------------------------------------------------------------
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// Standard active object cancellation function.
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// ----------------------------------------------------------------------------
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//
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void CUsbActiveState::DoCancel()
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    {
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    LOG_FUNC
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    iUsbMan.DeviceStateNotificationCancel();
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    }
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// ----------------------------------------------------------------------------
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// Get current device state.
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// ----------------------------------------------------------------------------
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//
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TUsbDeviceState CUsbActiveState::CurrentState()
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    {
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    LOG_FUNC
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    return iCurrentState;
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    }
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// ----------------------------------------------------------------------------
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// Get previous device state.
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// ----------------------------------------------------------------------------
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//
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TUsbDeviceState CUsbActiveState::PreviousState()
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    {
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    LOG_FUNC
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    return iPreviousState;
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    }
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// End of file