diff -r 000000000000 -r a2952bb97e68 mmappfw_plat/mpx_common_api/inc/mpxtaskqueue.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmappfw_plat/mpx_common_api/inc/mpxtaskqueue.h	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,257 @@
+/*
+* 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:  Serializing the task
+*
+*/
+
+
+#ifndef CMPXTASKQUEUE_H
+#define CMPXTASKQUEUE_H
+
+#include <e32base.h>
+
+class MMPXTaskQueueObserver;
+class CMPXTaskQueueScheduler;
+class CTask;
+
+/**
+* Encapsulates a task queue.
+*
+* @lib MPXCommon.lib
+*/
+class CMPXTaskQueue : public CBase
+    {
+public:
+    /**
+    * Two-phased constructor.
+    *
+    * @since S60 3.2.3
+    * @return object of constructed
+    */
+    IMPORT_C static CMPXTaskQueue* NewL();
+
+    /**
+    *  Destructor.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C virtual ~CMPXTaskQueue();
+
+    /**
+    *  Add a task into the queue.
+    *
+    *  @since S60 3.2.3
+    *  @param aTask task id
+    *  @param aCallback callback
+    *  @param aParamData parameter data of the task
+    *  @param aBuf extra data in buffer, ownership transferred.
+    *  @param aPtrData object pointer, owership not transferred.
+    *  @param aCObject1 pointer to CBased object, ownership transferred
+    *  @param aCObject2 pointer to CBased object, ownership transferred
+    */
+    IMPORT_C void AddTaskL(TInt aTask,
+                           TAny* aCallback,
+                           TInt aParamData=0,
+                           CBufBase* aBuf=NULL,
+                           TAny* aPtrData=NULL,
+                           CBase* aCObject1=NULL,
+                           CBase* aCObject2=NULL);
+
+    /**
+    *  Remove current task, return callback function.
+    *
+    *  @since S60 3.2.3
+    *  @return callback object
+    */
+    IMPORT_C TAny* RemoveTask();
+
+    /**
+    *  Remove task for one client.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C void RemoveTask(TAny* aCallback);
+
+    /**
+    *  Return if the queue is empty.
+    *
+    *  @since S60 3.2.3
+    *  @return ETrue empty
+    */
+    IMPORT_C TBool IsEmpty();
+
+    /**
+    *  Reset task queue.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C void Reset();
+
+    /**
+    *  Get current task id.
+    *
+    *  @since S60 3.2.3
+    *  @return task id
+    */
+    IMPORT_C TInt Task();
+
+    /**
+    *  Get current call back.
+    *
+    *  @since S60 3.2.3
+    *  @return call back
+    */
+    IMPORT_C TAny* Callback();
+
+    /**
+    *  Get current parameter data.
+    *
+    *  @since S60 3.2.3
+    *  @return parameter data
+    */
+    IMPORT_C TInt Param();
+
+    /**
+    *  Get pointer parameter data. Client has ownership of this data.
+    *
+    *  @since S60 3.2.3
+    *  @return pointer paramter
+    */
+    IMPORT_C TAny* PtrData();
+
+    /**
+    *  Get pointer to buffer data. Task Queue has ownership of this buffer.
+    *
+    *  @since S60 3.2.3
+    *  @return buffer paramter
+    */
+    IMPORT_C const TDesC8& BufData();
+
+protected:
+    /**
+    *  C++ constructor.
+    *
+    *  @since S60 3.2.3
+    */
+    CMPXTaskQueue();
+
+    /**
+    *  2nd phase contructor.
+    *
+    *  @since S60 3.2.3
+    */
+    void ConstructL();
+
+protected: //data
+    TSglQue<CTask> iTaskList;
+    };
+
+/**
+* Encapsulates a task queue which will auto schedule the task
+*
+* @lib MPXCommon.lib
+*/
+class CMPXActiveTaskQueue : public CMPXTaskQueue
+    {
+public:
+    /**
+    * Two-phased constructor.
+    *
+    * @since S60 3.2.3
+    * @param aObserver the observer
+    * @return object of constructed
+    */
+    IMPORT_C static CMPXActiveTaskQueue* NewL();
+
+    /**
+    *  Destructor.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C virtual ~CMPXActiveTaskQueue();
+
+    /**
+    *  Add a task and automatically schedule task.
+    *
+    *  @since S60 3.2.3
+    *  @param aTask task id
+    *  @param aCallback callback
+    *  @param aHandler task handler
+    *  @param aParamData data
+    *  @param aBuf pointer to the buffer containing
+    *               externalized parameter data.
+    *               Client passes ownership of the buffer
+    *               to TaskQueue.
+    *  @param aPtrData object pointer
+    *  @param aCObject1 pointer to CBased object, ownership transferred
+    *  @param aCObject2 pointer to CBased object, ownership transferred
+    */
+    IMPORT_C void AddTaskL(TInt aTask,
+                           TAny* aCallback,
+                           MMPXTaskQueueObserver* aHandler,
+                           TInt aParamData=0,
+                           CBufBase* aBuf=NULL,
+                           TAny* aPtrData=NULL,
+                           CBase* aCObject1=NULL,
+                           CBase* aCObject2=NULL);
+
+   /**
+    *  Schedule to execute next task.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C void ScheduleNextTask();
+
+    /**
+    *  Cancel all outstanding, asynchronous requests.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C void CancelRequests();
+
+    /**
+    *  Complete current task.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C void CompleteTask();
+
+    /**
+    *  Completes all outstanding tasks with an error code.
+    *
+    *  @since S60 3.2.3
+    */
+    IMPORT_C void CompleteAllTasks(TInt aError);
+
+private:
+    /**
+    *  C++ constructor.
+    *
+    *  @since S60 3.2.3
+    */
+    CMPXActiveTaskQueue();
+
+    /**
+    *  2nd phase contructor.
+    *
+    *  @since S60 3.2.3
+    */
+    void ConstructL();
+
+private: // Data
+    CMPXTaskQueueScheduler* iScheduler;
+
+    };
+
+#endif // CMPXTASKQUEUE_H