// 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     : sem_post.cpp

// Part of  : PThread library

// sem_post call is implemented.

// Version:

//

#include <e32def.h>

#include <errno.h>

#include "semaphore.h"

#include "semaphoretypes.h"

#include "pthread.h"

EXPORT_C int sem_post (sem_t * sem)

{

    if (!sem || !(*sem))

    {

        errno = EINVAL;

        return -1;

    }

    _sem_t* gsem = *sem;

    if(gsem->iState != _sem_t::EInitialized)

    {

        errno = EINVAL;

        return -1;

    }

    gsem->iMutex.Wait();

    if(gsem->iState != _sem_t::EInitialized)

    {

        errno = EINVAL;

        return -1;

    }

    int count = ++(gsem->iCount);

    if(count <=0)

    {

        //blocked waiters

        gsem->iSemaphore.Signal(); 

    }

    gsem->iMutex.Signal();

    return 0;

}//sem_post()

//End of File