messagingfw/msgsrvnstore/server/src/MENTACT.CPP
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// Copyright (c) 1998-2009 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 "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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//
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#include <e32std.h>
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#include "MENTACT.H"
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#include "MSVPANIC.H"
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//
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// CMsgActive framework
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//
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EXPORT_C CMsgActive::CMsgActive(TInt aPriority)
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	:CActive(aPriority)
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	{}
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EXPORT_C CMsgActive::~CMsgActive()
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	{
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	Cancel();		// framework requirement
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	}
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EXPORT_C void CMsgActive::Queue(TRequestStatus& aStatus)
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//
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// call this last when an asynch operation has been requested
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//
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	{
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	__ASSERT_DEBUG(iReport==NULL, PanicServer(EMsvCMsgActiveAlreadyActive));
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//
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	aStatus=KRequestPending;
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	iReport=&aStatus;
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	}
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EXPORT_C void CMsgActive::DoCancel()
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//
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// must be called at end of derived classes DoCancel()
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//
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	{
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	TInt result=KErrCancel;
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	Complete(result);	// can be done safely as asynch reporting
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	}
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EXPORT_C void CMsgActive::RunL()
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//
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// When the AO is state driven, this form of Run() is very effective
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// DoRunL() takes the AO through the states, queuing another asynch step as required
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// if DoRunL() detects the end of the cycle it returns without queuing another cycle.
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//
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// If Run() would exit without queuing another cycle it reports completion to the client.
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// This is true if the asynch step or DoRunL fails, or the state cycle is complete
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//
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	{
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	TInt status=iStatus.Int();
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	if (status>=KErrNone)
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		{
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		TRAPD(error,DoRunL());		// continue operations, may re-queue
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		__ASSERT_DEBUG(error==KErrNone || !IsActive(),User::Invariant());	// must not requeue in error situations
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		if (IsActive())				// requeud
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			return;
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		status=error;
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		}
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	Complete(status);
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	}
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EXPORT_C void CMsgActive::Complete(TInt aStatus)
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	{
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	if (iReport)
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		{
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		// only complete properly once.
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		// this allows a derived class to complete and then cancel, reporting the desired state instead of KErrCancel
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		DoComplete(aStatus);
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		User::RequestComplete(iReport,aStatus);
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		}
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	}
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EXPORT_C void CMsgActive::DoComplete(TInt&)
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//
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// Default implementation does nothing
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//
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	{}