// 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