--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/natfw/natfwclient/inc/cnatfwasynccallback.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,129 @@
+/*
+* Copyright (c) 2007 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 C_NATFWASYNCCALLBACK_H
+#define C_NATFWASYNCCALLBACK_H
+
+// INCLUDES
+#include <e32base.h>
+#include "natfwcallbackinfo.h"
+
+// CLASS DECLARATION
+/**
+ * CNatFwAsyncCallback is an active object used to guarantee that when the
+ * function calls to the MNATFWConnectivityObserver are made, the upper layer
+ * can delete any plugin related object it owns.
+ */
+NONSHARABLE_CLASS( CNatFwAsyncCallback ) : public CActive
+    {
+public: // Constructor and destructor
+
+    /**
+     * Two-phased constructor.
+     */
+    static CNatFwAsyncCallback* NewL();
+
+    /**
+     * Frees the resources of CNatFwAsyncCallback. Any issued callback
+     * request that have not yet been executed, are discarded.
+     *
+     * @since   s60 3.2
+     */
+    ~CNatFwAsyncCallback();
+
+public: // New functions
+
+    /**
+     * Orders a specified callback function to be called, and provides all
+     * necessary parameters.
+     *
+     * @since   s60 3.2
+     * @param   aController Event registration controller
+     * @param   aFunction   Identifies the function of
+     *                      MNATFWConnectivityObserver to use
+     * @param   aSessionId  Session ID
+     * @param   aStreamId   Stream ID
+     * @param   aErrorCode  Error reason
+     * @return  void
+     */
+    void MakeCallbackL( MNATFWRegistrationController& aController,
+                        CNatFwCallbackInfo::TFunction aFunction,
+                        TUint aSessionId,
+                        TUint aStreamId,
+                        TInt aErrorCode,
+                        TAny* aEventData );
+
+    /**
+     * Removes all pending callbacks, which have the specified
+     * stream ID as a parameter.
+     *
+     * @since   s60 3.2
+     * @param   aStreamId
+     * @return  void
+     */
+    void CancelCallback( TUint aStreamId );
+
+protected: // From CActive
+
+    void DoCancel();
+
+    void RunL();
+
+    TInt RunError( TInt aError );
+
+private: // Constructors
+
+    CNatFwAsyncCallback();
+
+private: // New functions, for internal use
+
+    /**
+     * Starts waiting for MakeCallbackL events.
+     *
+     * @since   s60 3.2
+     * @return  void
+     */
+    void WaitForRequestsL();
+
+    /**
+     * Wakes system up.
+     *
+     * @since   s60 3.2
+     * @return  void
+     */
+    void Wakeup();
+
+    /**
+     * Calls the oldest callback entry, if any.
+     *
+     * @since   s60 3.2
+     * @return  void
+     */
+    void ExecuteFirstCallback();
+
+private: // Data
+
+    /**
+     * Callback requests that have not yet been executed
+     */
+    TSglQue<CNatFwCallbackInfo> iPendingCallbacks;
+    };
+
+#endif // C_NATFWASYNCCALLBACK_H