/*

* Copyright (c) 2008 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:   Has the main entry point of clockserver.exe

*

*/

// System includes

#include <e32base.h>

// User includes

#include "clockservercommon.h"

#include "clockservermain.h"

#include "clockserver.h"

// Literals

_LIT( KLabelFault, "ClockServerThread-fault");

// ---------------------------------------------------------

// Fault(TSrvFault aFault)

// rest of the details are commented in the header

// ---------------------------------------------------------

//

GLDEF_C void Fault( TSrvFault aFault )

    {

    User::Panic( KLabelFault, aFault );

    }

// ---------------------------------------------------------

// TheServerThread( TAny* /*aPr*/ )

// rest of the details are commented in the header

// ---------------------------------------------------------

//

EXPORT_C TInt TheServerThread( TAny* /*aPr*/ )

    {

    RSemaphore semaphoreHandle;

	// Check if a semaphore is already associated with ClockServer

    if( KErrNone != semaphoreHandle.OpenGlobal( KNameClockServerStartSemaphore ) )

        {

		// If no, then create one.

        if( KErrNone != semaphoreHandle.CreateGlobal( KNameClockServerStartSemaphore, 0 ) )

            {

			// There's a problem with creating the semaphore.

            Fault( EMainCreateSemaphore );

            }

        }

    else

        {

		// The global semaphore is already there.

        semaphoreHandle.Close();

        return KErrNone;

        }

    __UHEAP_MARK;		// Mark beginning of the HEAP

	TInt errCode = KErrNone ; 

	// Try renaming the current thread.

	errCode = User::RenameThread( KNameClockServer );

    __ASSERT_ALWAYS( errCode == KErrNone || errCode == KErrAlreadyExists, Fault( EMainClockServerThreadRename ) );

	// Construct and active scheduler

    CActiveScheduler* activeScheduler = new CActiveScheduler;

    __ASSERT_ALWAYS( activeScheduler != NULL, Fault( EMainCreateScheduler ) );

	// Install the active scheduler

	CActiveScheduler::Install( activeScheduler );

    CTrapCleanup* trapCleanup = CTrapCleanup::New();

    CClkSrvMain* clockServer = NULL;

	// Constructing the CClkSrvMain object, this inturn starts the server in CClkSrvMain::ConstructL -> StartL

    TRAPD( error, clockServer = CClkSrvMain::NewL() );

	__ASSERT_DEBUG( !error, Fault( EMainServerNotStarted ) );

    if( KErrNone == error )

        {

		// Start the active scheduler

        CActiveScheduler::Start();

        }

	// Cleanup

    delete clockServer;

    delete CActiveScheduler::Current();

    delete trapCleanup;

    __UHEAP_MARKEND;	// Mark end of the HEAP

    // Close the handle to the RSemaphore

	semaphoreHandle.Close();

    return KErrNone;

    }

// ---------------------------------------------------------

// IsServerLoaded()

// rest of the details are commented in the header

// ---------------------------------------------------------

//

LOCAL_C TBool IsServerLoaded()

    {

    TFindServer findServer( KNameClockServer );

    TFullName fullName;

    return( findServer.Next( fullName ) == KErrNone );

    }

// ---------------------------------------------------------

// E32Main()

// rest of the details are commented in the header

// ---------------------------------------------------------

//

GLDEF_C TInt E32Main()

    {

    return ( IsServerLoaded() ? KErrInUse : TheServerThread( NULL ) );

    }

// End of file