/*

* 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:

* Talks directly to the USB Logical Device Driver (LDD) and 

* watches any state changes

*

*/

/**

 @file

*/

#include "CUsbScheduler.h"

#include "CUsbDeviceStateWatcher.h"

#include "CUsbDevice.h"

/**

 * The CUsbDeviceStateWatcher::NewL method

 *

 * Constructs a new CUsbDeviceStateWatcher object

 *

 * @internalComponent

 * @param	aOwner	The device that owns the state watcher

 * @param	aLdd	A reference to the USB Logical Device Driver

 *

 * @return	A new CUsbDeviceStateWatcher object

 */

CUsbDeviceStateWatcher* CUsbDeviceStateWatcher::NewL(CUsbDevice& aOwner, RDevUsbcClient& aLdd)

	{

	CUsbDeviceStateWatcher* r = new (ELeave) CUsbDeviceStateWatcher(aOwner, aLdd);

	return r;

	}

/**

 * The CUsbDeviceStateWatcher::~CUsbDeviceStateWatcher method

 *

 * Destructor

 *

 * @internalComponent

 */

CUsbDeviceStateWatcher::~CUsbDeviceStateWatcher()

	{

	Cancel();

	}

/**

 * The CUsbDeviceStateWatcher::CUsbDeviceStateWatcher method

 *

 * Constructor

 *

 * @param	aOwner	The device that owns the state watcher

 * @param	aLdd	A reference to the USB Logical Device Driver

 */

CUsbDeviceStateWatcher::CUsbDeviceStateWatcher(CUsbDevice& aOwner, RDevUsbcClient& aLdd)

	: CActive(CActive::EPriorityStandard), iOwner(aOwner), iLdd(aLdd)

	{

	CActiveScheduler::Add(this);

	}

/**

 * Called when the USB device changes its state.

 */

void CUsbDeviceStateWatcher::RunL()

	{

	if (iStatus.Int() != KErrNone)

		{

		return;

		}

	if (!(iState & KUsbAlternateSetting))

		iOwner.SetDeviceState((TUsbcDeviceState) iState);

	iLdd.AlternateDeviceStatusNotify(iStatus, iState);

	SetActive();

	}

/**

 * Automatically called when the state watcher is cancelled.

 */

void CUsbDeviceStateWatcher::DoCancel()

	{

	iLdd.AlternateDeviceStatusNotifyCancel();

	}

/**

 * Instructs the state watcher to start watching.

 */

void CUsbDeviceStateWatcher::Start()

	{

	iLdd.AlternateDeviceStatusNotify(iStatus, iState);

	SetActive();

	}