usbmgmt/usbmgr/device/classdrivers/acm/classimplementation/ecacm/inc/ActiveDataAvailableNotifier.h
/*
* 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__