// Copyright (c) 2005-2009 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:

// Name        : pthread_once.cpp

// Part of     : pthread

// Interface   : POSIX, pthread

// POSIX implementation of mutexes on Symbian

// Version     :

//

#include "mutextypes.h"

EXPORT_C int pthread_once(pthread_once_t * once_control, 

                          thread_init_routine init_routine)

{

#ifndef NOUSE_INTERNALS

    void* tlsPtr;

    // Get the TLS pointer

    tlsPtr = _pthread_getTls();  

    if(!tlsPtr)

    {

        return ENOMEM;

    }

#endif  

    if(!once_control || !init_routine)

    {

        return EINVAL;

    }

    if (*once_control == _EDone) 

    {

        return 0;   

    }

#ifndef NOUSE_INTERNALS  

    _pthread_atomicMutexLock(tlsPtr);

#endif  

    if(*once_control == _EDone)

    {

#ifndef  NOUSE_INTERNALS   

        _pthread_atomicMutexUnlock(tlsPtr);

#endif      

        return 0;

    }

    *once_control = _EDoing;

    init_routine();

    *once_control = _EDone;

#ifndef NOUSE_INTERNALS    

    _pthread_atomicMutexUnlock(tlsPtr);

#endif   

    return 0;

}

// End of File