/*

* Copyright (c) 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 <memspy/engine/memspyenginemidwife.h>

// Driver includes

#include <memspy/driver/memspydriverclient.h>

#include <memspy/driver/memspydriverenumerationsshared.h>

CMemSpyEngineMidwife::CMemSpyEngineMidwife( RMemSpyDriverClient& aDriver, TInt aPriority )

:	CActive( aPriority ), iDriver( aDriver )

	{

	CActiveScheduler::Add( this );

	}

CMemSpyEngineMidwife::~CMemSpyEngineMidwife()

	{

	Cancel();

    //

    if ( iEventMonitorHandle != KNullHandle )

        {

        iDriver.EventMonitorClose( iEventMonitorHandle );

        }

    //

    iObservers.Close();

	}

void CMemSpyEngineMidwife::ConstructL()

	{

    const TInt error = iDriver.EventMonitorOpen( iEventMonitorHandle );

    User::LeaveIfError( error );

    //

	Request();

	}

CMemSpyEngineMidwife* CMemSpyEngineMidwife::NewL( RMemSpyDriverClient& aDriver, TInt aPriority )

	{

	CMemSpyEngineMidwife* self = new(ELeave) CMemSpyEngineMidwife( aDriver, aPriority );

	CleanupStack::PushL( self );

	self->ConstructL();

	CleanupStack::Pop( self );

	return self;

	}

void CMemSpyEngineMidwife::AddObserverL( MMemSpyEngineMidwifeObserver& aObserver )

    {

    RemoveObserver( aObserver );

    iObservers.AppendL( &aObserver );

    }

void CMemSpyEngineMidwife::RemoveObserver( MMemSpyEngineMidwifeObserver& aObserver )

    {

    const TInt count = iObservers.Count();

    for( TInt i=count-1; i>=0; i-- )

        {

        MMemSpyEngineMidwifeObserver* obs = iObservers[ i ];

        if ( obs == &aObserver )

            {

            iObservers.Remove( i );

            }

        }

    }

void CMemSpyEngineMidwife::RunL()

	{

    const TUint notifiedId = iId;

    const TInt typeAsInt = iStatus.Int();

    User::LeaveIfError( typeAsInt );

	Request();

    //

    const TMemSpyDriverEventType type = static_cast< TMemSpyDriverEventType >( typeAsInt );

    switch( type )

        {

    case EMemSpyDriverEventTypeThreadCreate:

        {

        const TThreadId id( notifiedId );

        NotifyThreadBornL( id );

        break;

        }

    case EMemSpyDriverEventTypeProcessCreate:

        {

        const TProcessId id( notifiedId );

        NotifyProcessBornL( id );

        break;

        }

    default:

        // Process removal not handled as not relevant

        break;

        }

	}

void CMemSpyEngineMidwife::DoCancel()

	{

	iDriver.EventMonitorNotifyCancel( iEventMonitorHandle );

	}

void CMemSpyEngineMidwife::Request()

	{

    Cancel();

    iDriver.EventMonitorNotify( iEventMonitorHandle, iStatus, iId );

	SetActive();

	}

void CMemSpyEngineMidwife::NotifyProcessBornL( const TProcessId& aId )

    {

    // NB: opening may fail - client's must tolerate this

    RProcess process;

    iDriver.OpenProcess( aId, process );

    CleanupClosePushL( process );

    //

    const TInt count = iObservers.Count();

    for( TInt i=0; i<count; i++ )

        {

        MMemSpyEngineMidwifeObserver* obs = iObservers[ i ];

        TRAP_IGNORE( obs->ProcessIsBornL( aId, process ) );

        }

    //

    CleanupStack::PopAndDestroy( &process );

    }

void CMemSpyEngineMidwife::NotifyThreadBornL( const TThreadId& aId )

    {

    // NB: opening may fail - client's must tolerate this

    RThread thread;

    iDriver.OpenThread( aId, thread );

    CleanupClosePushL( thread );

    //

    const TInt count = iObservers.Count();

    for( TInt i=0; i<count; i++ )

        {

        MMemSpyEngineMidwifeObserver* obs = iObservers[ i ];

        TRAP_IGNORE( obs->ThreadIsBornL( aId, thread ) );

        }

    //

    CleanupStack::PopAndDestroy( &thread );

    }