/*

* Copyright (c) 2002-2009 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:  Implementations of methods of CMdSGarbageCollector class*

*/

#include "mdsgarbagecollector.h"

#include <e32svr.h> // RDebug

CMdSGarbageCollector::CMdSGarbageCollector(MMdSGarbageCollectorObserver& aObserver)

	: CActive( CActive::EPriorityLow ), iDelay(0), iNewDelay(0), iObserver( aObserver )

	{

	CActiveScheduler::Add( this );

	}

CMdSGarbageCollector::~CMdSGarbageCollector()

	{

	Cancel();

	iTimer.Close();

	}

void CMdSGarbageCollector::ConstructL()

	{

	User::LeaveIfError( iTimer.CreateLocal() );

	}

CMdSGarbageCollector* CMdSGarbageCollector::NewL(MMdSGarbageCollectorObserver& aObserver)

	{

    CMdSGarbageCollector* self = CMdSGarbageCollector::NewLC(aObserver);

    CleanupStack::Pop( self );

    return self;

	}

CMdSGarbageCollector* CMdSGarbageCollector::NewLC(MMdSGarbageCollectorObserver& aObserver)

	{

	CMdSGarbageCollector* self = new ( ELeave ) CMdSGarbageCollector(aObserver);

	CleanupStack::PushL( self );

	self->ConstructL();

	return self;

	}

void CMdSGarbageCollector::Start( TInt aDelay )

	{

	#ifdef _DEBUG

	RDebug::Print( _L("CMdSGarbageCollector::Start - delay: %d"), aDelay );

	#endif

	if ( aDelay < 0 )

		{

		return;

		}

	const TInt KSecondsToMicroseconds = 1000000;

	const TInt KMaxInterval = KMaxTInt / KSecondsToMicroseconds;

	if( IsActive() )

		{

		if ( iNewDelay.Int() == 0 )

			{

			// check if interval is less or equal to 2147 seconds (35 minutes and 47 seconds)

			if( aDelay <= KMaxInterval )	

				iNewDelay = aDelay * KSecondsToMicroseconds;

			else

				iNewDelay = KMaxTInt;

			}

		return;

		}

	#ifdef _DEBUG

	RDebug::Print( _L("CMdSGarbageCollector::Start(%d)"), aDelay ); // test

	#endif

	// check if interval is less or equal to 2147 seconds (35 minutes and 47 seconds)

	if( aDelay <= KMaxInterval )	

		iDelay = aDelay * KSecondsToMicroseconds;

	else

		iDelay = KMaxTInt;

	iTimer.After( iStatus, iDelay ); // start timer

	SetActive();

	}

void CMdSGarbageCollector::RunL()

	{

	if( iStatus == KErrNone )

		{

		const TBool startAgain = iObserver.StartGarbageCollectionL();

		if ( startAgain )

			{

			iTimer.After( iStatus, iDelay ); // start timer

			SetActive();

			}

		else if ( iNewDelay.Int() > 0 )

			{

			iDelay = iNewDelay;

			iNewDelay = 0;

			iTimer.After( iStatus, iDelay ); // start timer

			SetActive();

			}

		}

	}

void CMdSGarbageCollector::DoCancel()

	{

	#ifdef _DEBUG

	RDebug::Print( _L("CMdSGarbageCollector::DoCancel") );

	#endif

	iTimer.Cancel();

	}

#ifdef _DEBUG

TInt CMdSGarbageCollector::RunError( TInt aError )

	{

#else

TInt CMdSGarbageCollector::RunError( TInt /*aError*/ )

	{

#endif

	#ifdef _DEBUG

	RDebug::Print( _L("CMdSGarbageCollector::RunError %d"), aError );

	#endif

	return KErrNone;

	}

void CMdSGarbageCollector::Pause()

	{

	#ifdef _DEBUG

	RDebug::Print( _L("CMdSGarbageCollector::Pause") );

	#endif

	DoCancel();

	}

void CMdSGarbageCollector::Resume()

	{

	#ifdef _DEBUG

	RDebug::Print( _L("CMdSGarbageCollector::Resume") );

	#endif

	if( !IsActive() )

	    {

	    if ( iDelay.Int() > 0 )

	         {

	         iTimer.After( iStatus, iDelay ); // start timer

	         SetActive();

	         }

	    }

	}