--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/appfw/viewserver/inc/VWSQUEUE.H	Tue Feb 02 10:12:00 2010 +0200
@@ -0,0 +1,115 @@
+// Copyright (c) 1999-2009 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 __VWSQUEUE_H__
+#define __VWSQUEUE_H__
+
+#include <e32std.h>
+#include <e32base.h>
+
+#include "VWSDEBUG.H"
+#include "VWSERVER.H"
+
+
+//
+// Constants.
+//
+
+const TInt KQueueSize=16;
+
+
+//
+// Forward declarations.
+//
+
+class CVwsEvent;
+class CVwsServer;
+
+
+/**
+ * The CVwsEventQueue class implements an event queue for processing server and session events.
+ */
+class CVwsEventQueue : public CBase
+	{
+public:
+	CVwsEventQueue();
+
+#ifdef __DO_LOGGING__
+	CVwsEventQueue(const TDesC& aName);
+	void SetName(const TDesC& aName);
+#endif
+	~CVwsEventQueue();
+	void ProcessEventL(CVwsEvent* aEvent);
+	void HandleEventProcessed();
+	CVwsEvent* Head() const;
+	CVwsEvent* Tail() const;
+	TInt Count() const;
+	void HandleSessionRemoval(const TThreadId& aClientThreadId);
+	void KickStart();
+private:
+	void DeleteHead();
+	TInt AddToTail(CVwsEvent*& aEvent);
+	TInt RemoveHead();
+	TInt DoAddToTail(CVwsEvent* aEvent);
+	TInt AddToTailIfNotPair(CVwsEvent*& aEvent);
+	CVwsEvent* At(TInt aIndex);
+private:
+	enum TState
+		{
+		EEmpty,
+		EProcessing
+		};
+private:
+	CVwsEvent* iQueue[KQueueSize];
+	TInt iQueueStart;
+	TInt iQueueEnd;
+	TInt iQueueSize;
+	TState iState;
+#ifdef __DO_LOGGING__
+	TBuf<64> iQueueName;
+#endif
+	};
+
+
+/**
+ * The CVwsEvent class is the base class for events which can be processed by the server and session event queues
+ */
+class CVwsEvent : public CBase
+	{
+public:
+	enum TType
+		{
+		ENormal,
+		ERejectPairs
+		};
+public:
+	CVwsEvent(TType aType,CVwsEventQueue& aQueue);
+	~CVwsEvent();
+	TType Type();
+	void ReportEventProcessed();
+private:
+	friend class CVwsEventQueue;
+	virtual void ProcessEventL()=0;
+	virtual void HandleAddedToQueue();
+	virtual void HandleLastOnQueue();
+	virtual void HandleSessionRemoval(const TThreadId& aClientThreadId);
+private:
+	TType iType;
+	CVwsEventQueue& iQueue;
+	};
+
+
+#endif