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/**
* @file
*
* @brief Function sets scheduling policy and parameters of the thread
* @ingroup POSIXAPI
*/
/*
* 13.5.2 Dynamic Thread Scheduling Parameters Access,
* P1003.1c/Draft 10, p. 124
*/
/* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/posix/pthreadimpl.h>
#include <rtems/posix/priorityimpl.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/watchdogimpl.h>
#include <rtems/config.h>
int pthread_setschedparam(
pthread_t thread,
int policy,
struct sched_param *param
)
{
Thread_Control *the_thread;
POSIX_API_Control *api;
Thread_CPU_budget_algorithms budget_algorithm;
Thread_CPU_budget_algorithm_callout budget_callout;
Objects_Locations location;
int rc;
Priority_Control unused;
ISR_Level level;
/*
* Check all the parameters
*/
if ( !param )
return EINVAL;
rc = _POSIX_Thread_Translate_sched_param(
policy,
param,
&budget_algorithm,
&budget_callout
);
if ( rc )
return rc;
/*
* Actually change the scheduling policy and parameters
*/
the_thread = _Thread_Get( thread, &location );
switch ( location ) {
case OBJECTS_LOCAL:
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
if ( api->schedpolicy == SCHED_SPORADIC ) {
_ISR_Disable( level );
_Watchdog_Per_CPU_remove_relative( &api->Sporadic_timer );
_ISR_Enable( level );
}
api->schedpolicy = policy;
api->schedparam = *param;
api->Attributes.schedpolicy = policy;
api->Attributes.schedparam = *param;
the_thread->budget_algorithm = budget_algorithm;
the_thread->budget_callout = budget_callout;
switch ( api->schedpolicy ) {
case SCHED_OTHER:
case SCHED_FIFO:
case SCHED_RR:
the_thread->cpu_time_budget =
rtems_configuration_get_ticks_per_timeslice();
_Thread_Set_priority(
the_thread,
_POSIX_Priority_To_core( api->schedparam.sched_priority ),
&unused,
true
);
break;
case SCHED_SPORADIC:
api->ss_high_priority = api->schedparam.sched_priority;
_ISR_Disable( level );
_Watchdog_Per_CPU_remove_relative( &api->Sporadic_timer );
_ISR_Enable( level );
_POSIX_Threads_Sporadic_budget_TSR( &api->Sporadic_timer );
break;
}
_Objects_Put( &the_thread->Object );
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
return ESRCH;
}
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