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// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32\include\nkernsmp\nk_event.h
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//
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// WARNING: This file contains some APIs which are internal and are subject
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// to change without notice. Such APIs should therefore not be used
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// outside the Kernel and Hardware Services package.
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//
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#ifndef __NK_EVENT_H__
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#define __NK_EVENT_H__
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#include <nklib.h>
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class NSchedulable;
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class TSpinLock;
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class TDfcQue;
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/********************************************
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* Event handler
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********************************************/
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/**
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@internalComponent
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General event handler callback
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*/
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typedef void (*NEventFn)(TAny*);
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/**
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@internalComponent
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General event handler structure
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*/
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struct NEventHandler : public SDblQueLink // link into active queue
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{
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inline NEventHandler()
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: iHState(0), iTied(0), iPtr(0), iFn(0)
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{
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iTiedLink.iNext = 0;
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}
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enum TEventHandlerType
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{
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EEventHandlerIrq=0xFCu,
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EEventHandlerNTimer=0xFDu,
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EEventHandlerIDFC=0xFEu,
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EEventHandlerDummy=0xFFu,
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};
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struct N8816
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{
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TUint8 iHType;
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TUint8 iHState8;
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TUint16 iHState16;
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};
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struct N8888
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{
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TUint8 iHType;
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TUint8 iHState0;
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TUint8 iHState1;
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TUint8 iHState2;
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};
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union
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{
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volatile TUint32 iHState; // state information
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volatile TUint8 iHType; // type of event handler
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volatile N8816 i8816;
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volatile N8888 i8888;
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};
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union
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{
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NSchedulable* volatile iTied; // pointer to tied thread/group
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TDfcQue* volatile iDfcQ; // doubles as pointer to DFC queue
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}; // since DFCs can't be tied
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TAny* volatile iPtr; // argument to callback
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volatile NEventFn iFn; // callback function
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SDblQueLink iTiedLink; // link to tied/group for cleanup purposes
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static TSpinLock TiedLock; // Protects iTied member of all NEventHandlers
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};
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#endif
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