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/*
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* Copyright (c) 2008 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: Implementation
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*
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*/
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#ifndef C_USBSERVICECONTROL_H
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#define C_USBSERVICECONTROL_H
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#include <e32base.h>
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class RUsb;
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/**
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* usb service control observer interface, to get feedback on usb service state change
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*
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*/
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NONSHARABLE_CLASS( MUsbServiceControlObserver)
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{
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public:
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/**
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* called when request for usb services is completed
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* if there were few requests in a row, during operation,
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* only the last one's completion is notified
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* @param aError error code
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*/
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virtual void UsbServiceControlReqCompletedL(TInt aError) = 0;
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};
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/**
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* This class implements starting/stopping usb services
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*
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*/
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NONSHARABLE_CLASS( CUsbServiceControl ) : public CActive
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{
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public:
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enum TUsbServiceRequest
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{
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ERequestUndefined,
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EStartUsbService,
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EStopUsbService
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};
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/**
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* Two-phased constructor.
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* @param aObserver Observer
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* @param aUsb RUsb API
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*/
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static CUsbServiceControl* NewL(MUsbServiceControlObserver& aObserver,
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RUsb& aUsb);
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/**
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* Destructor.
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*/
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virtual ~CUsbServiceControl();
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/**
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* Starts usb service. When service is started call back function
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* MUsbServiceControlObserver::UsbServiceControlReqCompletedL will be called.
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* Client should not worry is usb service already started, or not,
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* and which one personality is started. Just request this API
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* @param aPersonalityId personality id (required by RUsb API to start usb services)
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* @return error code
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*/
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TInt StartL(TInt aPersonalityId);
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/**
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* Stops service. When service is stopped call back function
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* MUsbServiceControlObserver::UsbServiceControlReqCompletedL will be called
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* @return error code
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*/
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TInt StopL();
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public:
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// from base class CActive
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/**
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* Called when request is completed
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*/
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void RunL();
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/**
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* called when RunL leaves
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* @param aError error code
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* @return error code
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*/
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TInt RunError(TInt aError);
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/**
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* Called when request is cancelled
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*/
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void DoCancel();
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private:
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/**
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* Default constructor
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* @param aObserver receives call back when service started or stopped
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* @param aUsb usbman API
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*/
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CUsbServiceControl(MUsbServiceControlObserver& aObserver, RUsb& aUsb);
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/**
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* 2nd phase construction
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*/
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void ConstructL();
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private:
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/**
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* Observer
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* not own
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*/
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MUsbServiceControlObserver& iObserver;
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/**
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* RUsb API
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*/
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RUsb& iUsb;
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/**
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* personality ID, to be started
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*/
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TInt iPersonalityId;
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/**
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* Service state
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*/
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TUsbServiceState iServiceState; // required as a parameter for service states notifications
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};
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#endif // C_USBSTATEHOSTAHANDLE_H
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