--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wlan_bearer/wlanengine/wlan_symbian/wlanengine_symbian_3.1/inc/wlansystemtimehandler.h	Tue Feb 02 02:03:13 2010 +0200
@@ -0,0 +1,212 @@
+/*
+* Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "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:  Active object to get notification of system time change.
+*
+*/
+
+
+#ifndef WLANSYSTEMTIMEHANDLER_H
+#define WLANSYSTEMTIMEHANDLER_H
+
+#include <e32base.h>
+#include <e32std.h>
+
+
+/**
+ * Callback interface
+ */
+class MWlanSystemTimeCallback
+    {
+    public:
+    
+        /**
+         * User has changed the time and therefore WLAN region cache is not valid anymore.
+         */
+        virtual void OnSystemTimeChange() = 0;
+        
+        /**
+         * WLAN region cache needs to be always cleared after defined time.
+         */
+        virtual void OnCacheClearTimerExpiration() = 0;
+    };
+
+/**
+ * System time change handler.
+ * Active object that waits for system time change
+ * notification from Symbian side.
+ * @since S60 v5.0
+ */
+NONSHARABLE_CLASS( CWlanSystemTimeHandler ) : public CActive
+    {
+public: // Constructors and destructor
+
+    /**
+     * Static constructor.
+     * @param aClient          Interfce to client.
+     */
+    static CWlanSystemTimeHandler* NewL(
+        MWlanSystemTimeCallback& aClient);
+
+    /**
+     * Destructor.
+     */
+    virtual ~CWlanSystemTimeHandler();
+
+public: // New functions
+
+    /**
+     * Start the timer
+     * Handler starts to wait for system time change notifications
+     * @since S60 v.5.0
+     * @return error code
+     */
+    TInt StartTimer();
+
+    /**
+     * Stop the timer
+     * Handler stops to wait for system time change notifications
+     * @since S60 v.5.0
+     * @return error code
+     */
+    void StopTimer();
+
+
+public: // Functions from base classes
+
+    /**
+    * From CActive Is executed when synchronous request is ready.
+    */
+    void RunL();
+
+    /**
+    * From CActive Cancel synchronous request.
+    */
+    void DoCancel();
+
+private: // Functions
+
+    /**
+     * C++ default constructor.
+     * @param aClient Interfce to client.
+     */
+    CWlanSystemTimeHandler(
+        MWlanSystemTimeCallback& aClient );
+
+    /**
+     * By default Symbian 2nd phase constructor is private.
+     */
+    void ConstructL();
+   
+private: // Data
+
+    /**
+     * Asynchronous timer used to receive notification for system time change.
+     */
+    RTimer iTimer;
+       
+    /**
+     * Interface to forward packets.
+     */
+    MWlanSystemTimeCallback& iClient;
+
+    };
+
+/**
+ * Region cache clearing handler.
+ * Active object that ensures that region cache is cleared after defined time.
+ * @since S60 v5.0
+ */
+NONSHARABLE_CLASS( CWlanPeriodicCacheClearingHandler ) : public CActive
+    {
+public: // Constructors and destructor
+
+    /**
+     * Static constructor.
+     * @param aClient          Interfce to client.
+     */
+    static CWlanPeriodicCacheClearingHandler* NewL(
+        MWlanSystemTimeCallback& aClient);
+
+    /**
+     * Destructor.
+     */
+    virtual ~CWlanPeriodicCacheClearingHandler();
+
+public: // New functions
+
+    /**
+     * Start the timer
+     * Handler starts to wait for region cache clearing timer expiration.
+     * @since S60 v.5.0
+     * @return error code
+     */
+    TInt StartTimer();
+
+    /**
+     * Stop the timer
+     * Handler stops to wait for region cache clearing timer expiration.
+     * @since S60 v.5.0
+     * @return error code
+     */
+    void StopTimer();
+
+
+public: // Functions from base classes
+
+    /**
+    * From CActive Is executed when synchronous request is ready.
+    */
+    void RunL();
+
+    /**
+    * From CActive Cancel synchronous request.
+    */
+    void DoCancel();
+
+private: // Functions
+
+    /**
+     * C++ default constructor.
+     * @param aClient Interfce to client.
+     */
+    CWlanPeriodicCacheClearingHandler(
+        MWlanSystemTimeCallback& aClient );
+
+    /**
+     * By default Symbian 2nd phase constructor is private.
+     */
+    void ConstructL();
+   
+private: // Data
+   
+    /**
+     * Asynchronous timer used to ensure that WLAN region cache is cleared after
+     * defined time.
+     */
+    RTimer iClearTimer;
+    
+    /**
+     * The amount of times that iClearTimer needs to be started before the
+     * whole region cache expiration time has exceeded.
+     */
+    TInt iClearTimerCounter;
+    
+    /**
+     * Interface to forward the information that timer has expired.
+     */
+    MWlanSystemTimeCallback& iClient;
+
+    };
+
+#endif // WLANSYSTEMTIMEHANDLER_H