// Copyright (c) 2006-2009 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:

//

#include "cactivewaiter.h"

CActiveWaiter::CActiveWaiter()

	: CActive(CActive::EPriorityStandard)

	{

	CActiveScheduler::Add(this);

	}

CActiveWaiter::~CActiveWaiter()

	{ Cancel(); }

void CActiveWaiter::WaitActive()

	{ 

	ASSERT(!iScheduler.IsStarted());

	SetActive();

	iScheduler.Start();

	}

/**

Sets the active scheduler active and immidiately Cancels, calling the 

supplied cancel observer during DoCancel();

@param aCancelObserver performs and DoCancel() operations on behalf of this object

*/

void CActiveWaiter::SetActiveAndCancel(MActiveWaiterObserver& aCancelObserver)

	{

	ASSERT(!iScheduler.IsStarted());

	ASSERT(iCancelObserver == NULL);

	SetActive();

	iCancelObserver = &aCancelObserver;

	Cancel();

	}

/**

Cancels the current operation, and stops the active scheduler loop,

allowing a previous call to WaitActive() to return.

@param aCancelObserver performs and DoCancel() operations on behalf of this object

*/

void CActiveWaiter::CancelWaitActive(MActiveWaiterObserver& aCancelObserver)

	{ 

	ASSERT(iScheduler.IsStarted());

	ASSERT(iCancelObserver == NULL);

	iCancelObserver = &aCancelObserver;

	Cancel();

	ASSERT(iScheduler.CanStopNow());

	iScheduler.AsyncStop();

	}

void CActiveWaiter::RunL()

	{

	if (iScheduler.IsStarted())

		{

		ASSERT(iScheduler.CanStopNow());

		iScheduler.AsyncStop();

		}

	}

void CActiveWaiter::DoCancel()

	{

	ASSERT(iCancelObserver != NULL);

	iCancelObserver->DoCancel();

	iCancelObserver = NULL;

	}