diff -r 000000000000 -r 96e5fb8b040d kernel/eka/include/nkernsmp/nk_event.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/include/nkernsmp/nk_event.h	Thu Dec 17 09:24:54 2009 +0200
@@ -0,0 +1,93 @@
+// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "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:
+// e32\include\nkernsmp\nk_event.h
+// 
+// WARNING: This file contains some APIs which are internal and are subject
+//          to change without notice. Such APIs should therefore not be used
+//          outside the Kernel and Hardware Services package.
+//
+
+#ifndef __NK_EVENT_H__
+#define __NK_EVENT_H__
+
+#include <nklib.h>
+
+class NSchedulable;
+class TSpinLock;
+class TDfcQue;
+
+/********************************************
+ * Event handler
+ ********************************************/
+
+/**
+@internalComponent
+
+General event handler callback
+*/
+typedef void (*NEventFn)(TAny*);
+
+/**
+@internalComponent
+
+General event handler structure
+*/
+struct NEventHandler : public SDblQueLink		// link into active queue
+	{
+	inline NEventHandler()
+		:	iHState(0), iTied(0), iPtr(0), iFn(0)
+		{
+		iTiedLink.iNext = 0;
+		}
+
+	enum TEventHandlerType
+		{
+		EEventHandlerIrq=0xFCu,
+		EEventHandlerNTimer=0xFDu,
+		EEventHandlerIDFC=0xFEu,
+		EEventHandlerDummy=0xFFu,
+		};
+	struct N8816
+		{
+		TUint8	iHType;
+		TUint8	iHState8;
+		TUint16	iHState16;
+		};
+	struct N8888
+		{
+		TUint8	iHType;
+		TUint8	iHState0;
+		TUint8	iHState1;
+		TUint8	iHState2;
+		};
+	union
+		{
+		volatile TUint32		iHState;		// state information
+		volatile TUint8			iHType;			// type of event handler
+		volatile N8816			i8816;
+		volatile N8888			i8888;
+		};
+	union
+		{
+		NSchedulable* volatile	iTied;			// pointer to tied thread/group
+		TDfcQue* volatile		iDfcQ;			// doubles as pointer to DFC queue
+		};										// since DFCs can't be tied
+	TAny* volatile				iPtr;			// argument to callback
+	volatile NEventFn			iFn;			// callback function
+	SDblQueLink					iTiedLink;		// link to tied/group for cleanup purposes
+
+	static TSpinLock			TiedLock;		// Protects iTied member of all NEventHandlers
+	};
+
+#endif