--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sensorservices/sensorserver/inc/server/sensrvchannelchangequeue.h	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,144 @@
+/*
+* 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:  Channel change notifications queue implementation
+*
+*/
+
+
+#ifndef SENSRVCHANNELCHANGEQUEUE_H
+#define SENSRVCHANNELCHANGEQUEUE_H
+
+#include <e32base.h>
+#include "sensrvchannelinfo.h"
+
+/**
+ * Channel change notifications queue. 
+ *
+ * @since S60 5.0
+ */
+class CSensrvChannelChangeQueue : public CBase
+    {
+    public:
+       
+        /**
+        * Linkable data about channel change notification
+        */
+        class TChannelChangeNotification
+            {
+            public:
+                TChannelChangeNotification()
+                    {
+                    }
+
+                /**
+                * Link item for queueing channel change notifications
+                */
+                TSglQueLink iLink;
+                
+                /**
+                * Channel info
+                */
+                TSensrvChannelInfo iChannelInfo;
+                
+                /**
+                * Change type
+                */
+                TSensrvChannelChangeType iChangeType;
+            };
+
+
+        /**
+        * Two phase constructor.       
+        */
+        static CSensrvChannelChangeQueue* NewL();
+
+        /**
+        * Destructor.
+        */
+        virtual ~CSensrvChannelChangeQueue();
+
+        /**
+        * Creates new TChannelChangeNotification and adds it to the the queue.
+        *
+        * @since S60 5.0
+        * @param aChannelInfo The channel info related to change
+        * @param aChangeType Type of the change
+        * @return Symbian OS standard error code.
+        */
+        TInt Append( const TSensrvChannelInfo& aChannelInfo,
+                     TSensrvChannelChangeType aChangeType );
+
+        /**
+        * Gets pointer to first change notification from queue.
+        *
+        * @since S60 5.0
+        * @return First change notification in queue, or NULL if empty.
+        */
+        TChannelChangeNotification* First();
+
+        /**
+        * Removes and deletes first change notification from queue,
+        * if queue has any notifications.
+        *
+        * @since S60 5.0
+        */
+        void RemoveFirst();
+
+        /**
+        * Removes and deletes all queued change notifications.
+        *
+        * @since S60 5.0
+        */
+        void RemoveAll();
+        
+        /**
+        * Checks if queue is empty
+        *
+        * @since S60 5.0
+        * @return ETrue if queue is empty.
+        */
+        inline TBool IsEmpty() {return iChangesList.IsEmpty(); };
+        
+
+    private:
+
+        /**
+        * C++ constructor
+        */
+        CSensrvChannelChangeQueue();
+
+        /**
+        * 2nd phase of construction
+        *
+        * @since S60 5.0
+        */
+        void ConstructL();            
+
+    private:
+    
+        /**
+        * Holds queued properties.
+        * Queued objects are owned.
+        */
+        TSglQue<TChannelChangeNotification> iChangesList;
+
+        /**
+        * Iterator for property queue
+        */        
+        TSglQueIter<TChannelChangeNotification> iChangesListIter;
+    };
+
+
+
+#endif // SENSRVCHANNELCHANGEQUEUE_H