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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2016 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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,
PRIORITY_GROUP_FIRST,
&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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