/*

* Copyright (c) 2007-2009 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:

*

*/

#ifndef __ACTIVEDATAAVAILABLENOTIFIER_H__

#define __ACTIVEDATAAVAILABLENOTIFIER_H__

#include <e32base.h>

#include <d32usbc.h>

class RDevUsbcClient;

class MNotifyDataAvailableObserver;

NONSHARABLE_CLASS(CActiveDataAvailableNotifier) : public CActive

/**

 * Active object used to notify the parent when there is data available 

 * to be read from the LDD.  Since the LDD does not support this functionality 

 * directly RDevUsbcClient::ReadOneOrMore() is used instead, specifying a 

 * zero byte read into a descriptor which is owned by the class.

 */

	{

public: 									   

	static CActiveDataAvailableNotifier* NewL(MNotifyDataAvailableObserver& aParent, 

		RDevUsbcClient& aLdd, TEndpointNumber aEndpoint);

	~CActiveDataAvailableNotifier();

public:

	void NotifyDataAvailable();

private:

	CActiveDataAvailableNotifier(MNotifyDataAvailableObserver& aParent, 

		RDevUsbcClient& aLdd, TEndpointNumber aEndpoint);

private: // from CActive

	virtual void DoCancel();

	virtual void RunL();

private: // unowned

	MNotifyDataAvailableObserver& iParent;

	RDevUsbcClient& iLdd;

private: // owned

	TEndpointNumber iEndpoint;

	TBuf8<1> iUnusedBuf;	// passed to the LDD in order to carry out the zero byte read (length must be > 0)

	};

#endif // __ACTIVEDATAAVAILABLENOTIFIER_H__