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/*
* Copyright (c) 2016 embedded brains GmbH
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/posix/priorityimpl.h>
#include <rtems/posix/threadsup.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/schedulerimpl.h>
int pthread_setschedprio( pthread_t thread, int prio )
{
Thread_Control *the_thread;
Per_CPU_Control *cpu_self;
Thread_queue_Context queue_context;
const Scheduler_Control *scheduler;
Priority_Control new_priority;
bool valid;
_Thread_queue_Context_initialize( &queue_context );
_Thread_queue_Context_clear_priority_updates( &queue_context );
the_thread = _Thread_Get( thread, &queue_context.Lock_context.Lock_context );
if ( the_thread == NULL ) {
return ESRCH;
}
_Thread_Wait_acquire_critical( the_thread, &queue_context );
scheduler = _Thread_Scheduler_get_home( the_thread );
new_priority = _POSIX_Priority_To_core( scheduler, prio, &valid );
if ( !valid ) {
_Thread_Wait_release( the_thread, &queue_context );
return EINVAL;
}
_Thread_Priority_change(
the_thread,
&the_thread->Real_priority,
new_priority,
true,
&queue_context
);
cpu_self = _Thread_queue_Dispatch_disable( &queue_context );
_Thread_Wait_release( the_thread, &queue_context );
_Thread_Priority_update( &queue_context );
_Thread_Dispatch_enable( cpu_self );
return 0;
}
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