sl@0: // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // e32\nkern\win32\vectors.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "nk_priv.h"
sl@0: 
sl@0: inline TInt Invoke(TLinAddr aHandler,const TInt* aArgs)
sl@0: 	{return (TExecHandler(aHandler))(aArgs[0],aArgs[1],aArgs[2],aArgs[3]);}
sl@0: 
sl@0: /**	Executive dispatcher.
sl@0: 	This is hooked by EUSER to handle executive dispatch into the kernel.
sl@0: 	aArgs can be treated as an array of 1 to 4 arguments (depending on the exec call).
sl@0: 
sl@0: 	@internalTechnology
sl@0:  */
sl@0: EXPORT_C TInt __fastcall Dispatch(TInt aFunction, TInt* aArgs)
sl@0: 	{
sl@0: 	NThread& me = *static_cast<NThread*>(TheScheduler.iCurrentThread);
sl@0: 	//SL: Can't figure out why this fails at times
sl@0: 	__NK_ASSERT_ALWAYS(!me.iDiverted);
sl@0: 	
sl@0: 	/*
sl@0: 	if (me.iDiverted)
sl@0: 		{
sl@0: 		__KTRACE_OPT(KSCHED,DEBUGPRINT("WARNING: not diverted!"));
sl@0: 		}
sl@0: 	*/
sl@0: 
sl@0: 	EnterKernel();
sl@0: 
sl@0: 	if (aFunction & 0x800000)
sl@0: 		{
sl@0: 		aFunction &= 0x7fffff;
sl@0: 		// fast exec
sl@0: 		const SFastExecTable* table = me.iFastExecTable;
sl@0: 		if (aFunction == 0)
sl@0: 			{
sl@0: 			// special case fast exec call
sl@0: 			NKern::WaitForAnyRequest();
sl@0: 			LeaveKernel();
sl@0: 			return 0;
sl@0: 			}
sl@0: 		if (TUint(aFunction)<TUint(table->iFastExecCount))
sl@0: 			{
sl@0: 			NKern::Lock();
sl@0: 			TInt r = Invoke(table->iFunction[aFunction-1],aArgs);
sl@0: 			NKern::Unlock();
sl@0: 			LeaveKernel();
sl@0: 			return r;
sl@0: 			}
sl@0: 		// invalid exec number passed, so ensure we invoke the invalid exec
sl@0: 		// handler by setting an illegal slow exec number
sl@0: 		aFunction = -1;
sl@0: 		}
sl@0: 
sl@0: 	// slow exec
sl@0: 
sl@0: 	
sl@0: 	const SSlowExecTable* table = (const SSlowExecTable*)((const TUint8*)me.iSlowExecTable - _FOFF(SSlowExecTable,iEntries));
sl@0: 	if (TUint(aFunction) >= TUint(table->iSlowExecCount))
sl@0: 		return Invoke(table->iInvalidExecHandler,aArgs);
sl@0: 
sl@0: 	const SSlowExecEntry& e = table->iEntries[aFunction];
sl@0: 	if (e.iFlags & KExecFlagClaim)
sl@0: 		NKern::LockSystem();
sl@0: 	if (e.iFlags & KExecFlagPreprocess)
sl@0: 		{
sl@0: 		// replace the first argument with the result of preprocessing
sl@0: 		TPreprocessHandler preprocesser = (TPreprocessHandler)table->iPreprocessHandler;
sl@0: 		preprocesser(aArgs, e.iFlags);
sl@0: 		}
sl@0: 	TInt r = Invoke(e.iFunction,aArgs);
sl@0: 	if (e.iFlags & KExecFlagRelease)
sl@0: 		NKern::UnlockSystem();
sl@0: 	LeaveKernel();
sl@0: 	return r;
sl@0: 	}