|
Packit |
6c4009 |
/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <errno.h>
|
|
Packit |
6c4009 |
#include <sched.h>
|
|
Packit |
6c4009 |
#include <string.h>
|
|
Packit |
6c4009 |
#include <sched.h>
|
|
Packit |
6c4009 |
#include "pthreadP.h"
|
|
Packit |
6c4009 |
#include <lowlevellock.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int
|
|
Packit |
6c4009 |
pthread_setschedprio (pthread_t threadid, int prio)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct pthread *pd = (struct pthread *) threadid;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Make sure the descriptor is valid. */
|
|
Packit |
6c4009 |
if (INVALID_TD_P (pd))
|
|
Packit |
6c4009 |
/* Not a valid thread handle. */
|
|
Packit |
6c4009 |
return ESRCH;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int result = 0;
|
|
Packit |
6c4009 |
struct sched_param param;
|
|
Packit |
6c4009 |
param.sched_priority = prio;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* See CREATE THREAD NOTES in nptl/pthread_create.c. */
|
|
Packit |
6c4009 |
lll_lock (pd->lock, LLL_PRIVATE);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* If the thread should have higher priority because of some
|
|
Packit |
6c4009 |
PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
|
|
Packit |
6c4009 |
if (__builtin_expect (pd->tpp != NULL, 0) && pd->tpp->priomax > prio)
|
|
Packit |
6c4009 |
param.sched_priority = pd->tpp->priomax;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Try to set the scheduler information. */
|
|
Packit |
6c4009 |
if (__glibc_unlikely (sched_setparam (pd->tid, ¶m) == -1))
|
|
Packit |
6c4009 |
result = errno;
|
|
Packit |
6c4009 |
else
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* We succeeded changing the kernel information. Reflect this
|
|
Packit |
6c4009 |
change in the thread descriptor. */
|
|
Packit |
6c4009 |
param.sched_priority = prio;
|
|
Packit |
6c4009 |
memcpy (&pd->schedparam, ¶m, sizeof (struct sched_param));
|
|
Packit |
6c4009 |
pd->flags |= ATTR_FLAG_SCHED_SET;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
lll_unlock (pd->lock, LLL_PRIVATE);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return result;
|
|
Packit |
6c4009 |
}
|