--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbengines/usbotgwatcher/inc/cusbservicecontrol.h	Thu Dec 17 09:14:30 2009 +0200
@@ -0,0 +1,142 @@
+/*
+* Copyright (c) 2008-2009 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:  Implementation 
+ *
+*/
+
+
+#ifndef C_USBSERVICECONTROL_H
+#define C_USBSERVICECONTROL_H
+
+#include <e32base.h>
+
+class RUsb;
+
+/**
+ *  usb service control observer interface, to get feedback on usb service state change
+ *
+ */
+NONSHARABLE_CLASS( MUsbServiceControlObserver)
+    {
+public:
+
+    /**
+     * called when request for usb services is completed
+     * if there were few requests in a row, during operation, 
+     * only the last one's completion is notified
+     * @param aError error code
+     */
+    virtual void UsbServiceControlReqCompletedL(TInt aError) = 0;
+
+    };
+
+/**
+ *  This class implements starting/stopping usb services 
+ *
+ */
+NONSHARABLE_CLASS( CUsbServiceControl ) : public CActive
+    {
+
+public:
+
+    /**
+     * Two-phased constructor.
+     * @param aObserver Observer
+     * @param aUsb RUsb API
+     */
+    static CUsbServiceControl* NewL(MUsbServiceControlObserver* aObserver,
+            RUsb& aUsb);
+
+    /**
+     * Destructor.
+     */
+    virtual ~CUsbServiceControl();
+
+    /**
+     * Starts usb service. When service is started call back function 
+     * MUsbServiceControlObserver::UsbServiceStarted will be called.
+     * Client should not worry is usb service already started, or not,
+     * and which one personality is started. Just request this API 
+     * @param aPersonalityId personality id (required by RUsb API to start usb services) 
+     * @return error code
+     */
+    TInt Start(TInt aPersonalityId);
+
+    /**
+     * Stops service. When service is stopped call back function 
+     * MUsbServiceControlObserver::UsbServiceStopped will be called
+     * @return error code
+     */
+    TInt Stop();
+
+public:
+
+    // from base class CActive
+    /**
+     * Called when request is completed
+     */
+    void RunL();
+
+    /**
+     * called when RunL leaves
+     * @param aError error code
+     * @return error code
+     */
+    TInt RunError(TInt aError);
+
+    /**
+     * Called when request is cancelled
+     */
+    void DoCancel();
+
+private:
+
+    /**
+     * Default constructor
+     * @param aObserver receives call back when service started or stopped
+     * @param aUsb usbman API
+     */
+    CUsbServiceControl(MUsbServiceControlObserver* aObserver, RUsb& aUsb);
+
+    /**
+     * 2nd phase construction
+     */
+    void ConstructL();
+
+private:
+
+    /**
+     * Observer
+     * not own
+     */
+    MUsbServiceControlObserver* iObserver;
+
+    /**
+     * RUsb API
+     */
+    RUsb& iUsb;
+
+    /**
+     * personality ID, to be started
+     */
+    TInt iPersonalityId;
+
+    /**
+     * Service state
+     */
+    TUsbServiceState iServiceState; // required as a parameter for service states notifications 
+
+    };
+
+#endif //  C_USBSTATEHOSTAHANDLE_H