--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/resourcemgmt/hwresourcesmgr/client/inc/HWRMGenericAsyncObserver.h	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,137 @@
+/*
+* Copyright (c) 2005-2009 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:
+*
+*/
+
+
+
+
+/**
+ @file
+ @internalTechnology 
+*/
+
+#ifndef HWRMGENERICASYNCOBSERVER_H
+#define HWRMGENERICASYNCOBSERVER_H
+
+#include <e32base.h>
+#include "HWRMClient.h"
+
+
+/**
+* Callback interface for async notification
+*/
+class MHWRMGenericAsyncObserver
+    {
+    public:
+    
+        /**
+        * Notifies async response.
+        *
+        * @param aCommand Command for which the status value was obtained
+        * @param aStatus Status value
+        */
+        virtual void AsyncRequestCompleted(TInt aCommand, TInt aStatusValue)=0;
+    };
+
+
+/**
+* Active object wrapper for async HWRM client-server calls.
+* Listens for status completion and notifies the callback.
+* Also resubscribes the notification automatically.
+*
+*/
+class CHWRMGenericAsyncObserver : public CActive
+    {
+    public:
+
+        /**
+        * This is a two-phase constructor method that is used to
+        * create a new instance of CHWRMGenericAsyncObserver.
+        * A newly created instance immediately starts listening to vibra status changes.
+        *
+        * @param aClient Reference to RHWRMClient instance that is used to (re)subscribe notification.
+        * @param aCommand Command ID to be used in subscribing.
+        * @param aInitialCommand Command ID to get initial value. 
+        *         Initial value is not get if this parameter is negative.
+        *         This initial command can only take one TInt parameter on slot 0,
+        *         which is used to return the initial value.
+        * @param aCallback Pointer to a callback instance. Can be NULL.
+        * @return          A pointer to a new instance of the CHWRMGenericAsyncObserver class.
+        */
+        IMPORT_C static CHWRMGenericAsyncObserver* NewL(RHWRMClient& aClient, 
+                                               TInt aCommand,
+                                               TInt aInitialCommand,
+                                               MHWRMGenericAsyncObserver* aCallback);
+
+        /**
+        * Destructor.
+        */
+        virtual ~CHWRMGenericAsyncObserver();
+
+        /**
+        * This method retrieves the most recently received status value.
+        *
+        * @return Integer indicating the latest status
+        */
+        TInt LatestStatus() const;
+
+    protected:
+
+        // From CActive
+        void RunL();
+        void DoCancel();
+        
+        // No need for RunError, as RunL will never leave
+
+    private:
+
+        /**
+        * Constructor
+        *
+        * @param aClient Reference to RHWRMClient instance that is used to (re)subscribe notification.
+        * @param aCommand Command ID to be used in subscribing.
+        * @param aCallback Pointer to a callback instance. Must be non-NULL.
+        */
+        CHWRMGenericAsyncObserver(RHWRMClient& aClient, 
+                                  TInt aCommand,
+                                  MHWRMGenericAsyncObserver* aCallback);
+                                                   
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        *
+        * @param aInitialCommand Command ID to get initial value. 
+        *         Initial value is not get if this parameter is negative.
+        *         This initial command can only take one TInt parameter on slot 0,
+        *         which is used to return the initial value.
+        */
+        void ConstructL(TInt aInitialCommand);
+
+        /*
+        * Order notification
+        */
+        void OrderNotification();
+       
+    private:
+        
+        MHWRMGenericAsyncObserver* iCallback;   // Not owned by this class. Can be NULL.
+        RHWRMClient& iClient;                   // HWRM Client, not owned
+        TInt iCommand;                          // Stores command
+        TInt iLatestStatus;                     // Stores status
+    };
+
+#endif      // HWRMGENERICASYNCOBSERVER_H
+
+// End of File