1 /*

     2 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 #ifndef __ACTIVEDATAAVAILABLENOTIFIER_H__

    19 #define __ACTIVEDATAAVAILABLENOTIFIER_H__

    20 

    21 #include <e32base.h>

    22 #include <d32usbc.h>

    23 

    24 class RDevUsbcClient;

    25 class MNotifyDataAvailableObserver;

    26 

    27 NONSHARABLE_CLASS(CActiveDataAvailableNotifier) : public CActive

    28 /**

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

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

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

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

    33  */

    34 	{

    35 public: 									   

    36 	static CActiveDataAvailableNotifier* NewL(MNotifyDataAvailableObserver& aParent, 

    37 		RDevUsbcClient& aLdd, TEndpointNumber aEndpoint);

    38 	~CActiveDataAvailableNotifier();

    39 

    40 public:

    41 	void NotifyDataAvailable();

    42 

    43 private:

    44 	CActiveDataAvailableNotifier(MNotifyDataAvailableObserver& aParent, 

    45 		RDevUsbcClient& aLdd, TEndpointNumber aEndpoint);

    46 

    47 private: // from CActive

    48 	virtual void DoCancel();

    49 	virtual void RunL();

    50 

    51 private: // unowned

    52 	MNotifyDataAvailableObserver& iParent;

    53 	RDevUsbcClient& iLdd;

    54 

    55 private: // owned

    56 	TEndpointNumber iEndpoint;

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

    58 	};

    59 

    60 #endif // __ACTIVEDATAAVAILABLENOTIFIER_H__