// 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_setschedparam.cpp

// Part of  : PThread library

// pthread_setschedparam call implementation.

// Version:

//

#include <pthread.h>

#include <errno.h>

#include "threadglobals.h"

#include "threadcreate.h"

#include "pthreadmisc.h"

EXPORT_C int pthread_setschedparam(pthread_t thread, int policy, 

                                   const struct sched_param *param)

{

    int priority;

    _global_data_t *glbPtr;

    _pthread_node_t *tempPtr;

    _pthread_node_t *selfNodePtr;

    _pthread_node_t *thHandle;

    THR_PRINTF("[pthread] Begin pthread_setschedparam\n");

    if (NULL == param)

    {

        THR_PRINTF("[pthread] End of pthread_setschedparam\n");

        return EINVAL;

    }

    /* Check the policy */

    switch (policy) 

    {

        case SCHED_RR:

            // Nothing has to be done.

            THR_PRINTF("[pthread] End pthread_setschedparam\n");

            break;

        default:

            THR_PRINTF("[pthread] End pthread_setschedparam\n");        

            return EINVAL;

    }    

    if ((param->sched_priority < MIN_RR_PRIORITY) ||

        (param->sched_priority > MAX_RR_PRIORITY))

    {

        THR_PRINTF("[pthread] End of pthread_setschedparam\n");

        return EINVAL;

    }

    /*  Mapping POSIX priorities to Symbian Threads priorities 

        POSIX     Symbian

    ---------     ------------------

      0 -  49  => EPriorityMuchLess

     50 -  99  => EPriorityLess

    100 - 149  => EPriorityNormal

    150 - 199  => EPriorityMore

    200 - 255  => EPriorityMuchMore

    */

    switch (param->sched_priority / 50)

    {

        case 0:

            priority = EPriorityMuchLess;

            break;

        case 1:

            priority = EPriorityLess;

            break;

        case 2:

            priority = EPriorityNormal;

            break;

        case 3:

            priority = EPriorityMore;

            break;

        default:

            priority = EPriorityMuchMore;

            break;                                                

    }

    /* Verify the thread handle */

    //Get the TLS value (self node pointer)

    selfNodePtr = (_pthread_node_t*) _pthread_getTls();

    //coverity[var_compare_op]

    if (NULL == selfNodePtr)

    {

        THR_PRINTF("[pthread] FATAL :TLS is not initialized \n");

        THR_PRINTF("[pthread] Terminating the process\n");

        RProcess rp;

        rp.Kill(0);                // Terminate the process

    }

    thHandle = (_pthread_node_t *)thread;

	//coverity[var_deref_op]

    glbPtr = selfNodePtr->glbDataPtr;  // point to global struct

    glbPtr->lockThreadTable.Wait();    // Acquire the thread table lock

    // Traverse through the list, till destination node is reached

    for (tempPtr = glbPtr->start; 

         ((tempPtr != thHandle) && (tempPtr != NULL)); 

         tempPtr = tempPtr->next)

    {

        ;             //Empty loop 

    }

    if (NULL == tempPtr)              // Not found; 

    {

        THR_PRINTF("[pthread] End of pthread_setschedparam");

        glbPtr->lockThreadTable.Signal();  //release global lock

        return ESRCH;

    }

    thHandle->lockNode.Wait(); // Acquire the node lock 

    thHandle->rtHandle.SetPriority((TThreadPriority)priority);

    thHandle->priority = priority;

    thHandle->lockNode.Signal();

    glbPtr->lockThreadTable.Signal();  // release thread table lock

    THR_PRINTF("[pthread] End pthread_setschedparam\n");

    return 0;

}

// End of File