/*
* Copyright (c) 2005-2006 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:  sem_wait call is implemented.
*
*
*
*/


#include <e32def.h>
#include <errno.h>

#include "semaphore.h"
#include "semaphoretypes.h"
#include "pthread.h"

EXPORT_C int sem_wait (sem_t * sem)
{
    if (!sem || !(*sem))
    {
        errno = EINVAL;
        return -1;
    }

    _sem_t* lsem = *sem;
    if(lsem->iState != _sem_t::EInitialized)
    {
        errno = EINVAL;
        return -1;
    }

    if(_cancelable_mutex_wait(lsem) != 0)
    {
        return -1;
    }

    int prevCount = lsem->iCount;
    lsem->iCount--;    
    lsem->iMutex.Signal();

    if(prevCount <=0)
    {
        //pthread_cleanup_push();
        lsem->iSemaphore.Wait();
        //pthread_cleanup_pop();
    }
    return 0;
}//sem_wait()

// End of File

