--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmappfw_plat/mpx_common_api/inc/mpxtaskqueueobserver.h	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,68 @@
+/*
+* Copyright (c) 2006 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:  Task queue observer
+*
+*/
+
+
+#ifndef MMPXTASKQUEUEOBSERVER_H
+#define MMPXTASKQUEUEOBSERVER_H
+
+#include <e32base.h>
+
+/**
+*  Mix-in class for callback.
+*
+*  @lib MPXCommon.lib
+*/
+NONSHARABLE_CLASS( MMPXTaskQueueObserver )
+    {
+public:
+    /**
+    * Execute a task.
+    *
+    * @since S60 3.2.3
+    * @param aTask task number
+    * @param aParamData parameter
+    * @param aPtrData pointer to any object
+    * @param aBuf buffer containing externalized parameters for the task.
+    * @param aCallback call back function pointer
+    * @param aCObject1 object 1 owned by task queue
+    * @param aCObject2 object 2 owned by task queue
+    */
+    virtual void ExecuteTask(TInt aTask,
+                             TInt aParamData,
+                             TAny* aPtrData,
+                             const CBufBase& aBuf,
+                             TAny* aCallback,
+                             CBase* aCObject1,
+                             CBase* aCObject2) = 0;
+
+    /**
+    * Indicates that the specified task was completed with an error. This may have happened
+    * before the task was actually executed.
+    *
+    * @since S60 3.2.3
+    * @param aTask task number
+    * @param aPtrData pointer to any object
+    * @param aCallback call back function pointer
+    * @param aError error code
+    */
+    virtual void HandleTaskError(TInt /* aTask */,
+                                 TAny* /*aPtrData*/,
+                                 TAny* /*aCallback*/,
+                                 TInt /* aError */){};
+    };
+
+#endif // MMPXTASKQUEUEOBSERVER_H