/*

* Copyright (c) 2002 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: 

*       PbkExt.dll global variables. A singleton class.

*

*/

// INCLUDE FILES

#include "CPbkExtGlobals.h"

#include "CPbkMultiExtensionFactory.h"

#include "CPbkExtensionLoader.h"

// Debugging headers

#include <PbkDebug.h>

#include "PbkProfiling.h"

#include <ecom/ecom.h>

// Unnamed namespace for local definitions

namespace {

const TInt KExtensionGranularity = 1;

/**

 * Returns global instance of CPbkExtGlobals

 */

inline CPbkExtGlobals* Instance()

    {

    return static_cast<CPbkExtGlobals*>(Dll::Tls());

    }

} // namespace

// ==================== MEMBER FUNCTIONS ====================                 

CPbkExtGlobals::CPbkExtGlobals() :

    iExtensions(KExtensionGranularity)

    {

	}	

CPbkExtGlobals::~CPbkExtGlobals()

    {

    delete iMultiFactory;

    iExtensions.ResetAndDestroy();

    // Cleanup ECom session

    REComSession::FinalClose();

    }

CPbkExtGlobals* CPbkExtGlobals::NewLC()

    {

    CPbkExtGlobals* self = new (ELeave) CPbkExtGlobals;

    CleanupStack::PushL( self );

    return self;

    }

void CPbkExtGlobals::IncRef()

    {

    ++iRefCount;

    }

TInt CPbkExtGlobals::DecRef()

    {

    return --iRefCount;

    }

EXPORT_C CPbkExtGlobals* CPbkExtGlobals::InstanceL()

    {

    CPbkExtGlobals* instance = Instance();

    if (!instance)

        {

        instance = CPbkExtGlobals::NewLC();

        User::LeaveIfError(Dll::SetTls(instance));

        CleanupStack::Pop(instance);

        }

    instance->IncRef();

    return instance;

    }

EXPORT_C MPbkExtensionFactory& CPbkExtGlobals::FactoryL()

    {    

    if (!iMultiFactory)

		{

        __PBK_PROFILE_START(PbkProfiling::EPbkExtGlobalsScannerConstruct);

        // Make sure that there are no extensions when scanning

        iExtensions.ResetAndDestroy();

        // If scanning fails we leave here so that iMultiFactory

        // doesn't get created. So when calling this function

        // again scanning is tried again.

        CPbkExtensionScanner* scanner = 

            CPbkExtensionScanner::NewLC(iExtensions);

        __PBK_PROFILE_END(PbkProfiling::EPbkExtGlobalsScannerConstruct);

        __PBK_PROFILE_START(PbkProfiling::EExtensionScan);

        scanner->ScanL();

        CleanupStack::PopAndDestroy(scanner);

        __PBK_PROFILE_END(PbkProfiling::EExtensionScan);

        __PBK_PROFILE_START(PbkProfiling::EMultiFactoryConstruct);

		iMultiFactory = CPbkMultiExtensionFactory::NewL();

		const TInt count = iExtensions.Count();

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

			{

			iMultiFactory->AppendL(iExtensions.At(i)->ExtensionFactory());

			}

        __PBK_PROFILE_END(PbkProfiling::EMultiFactoryConstruct);

		}

    return *iMultiFactory;

    }

void CPbkExtGlobals::DoRelease()

    {

    if (DecRef() == 0)

        {

        Dll::SetTls(NULL);

        delete this;

        }

    }

// End of File