mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <sched.h>
|
|
#include <string.h>
|
|
#include <sched.h>
|
|
#include "pthreadP.h"
|
|
#include <lowlevellock.h>
|
|
|
|
|
|
int
|
|
pthread_setschedprio (threadid, prio)
|
|
pthread_t threadid;
|
|
int prio;
|
|
{
|
|
struct pthread *pd = (struct pthread *) threadid;
|
|
|
|
/* Make sure the descriptor is valid. */
|
|
if (INVALID_TD_P (pd))
|
|
/* Not a valid thread handle. */
|
|
return ESRCH;
|
|
|
|
int result = 0;
|
|
struct sched_param param;
|
|
param.sched_priority = prio;
|
|
|
|
/* We have to handle cancellation in the following code since we are
|
|
locking another threads desriptor. */
|
|
pthread_cleanup_push ((void (*) (void *)) lll_unlock_wake_cb, &pd->lock);
|
|
|
|
lll_lock (pd->lock);
|
|
|
|
/* If the thread should have higher priority because of some
|
|
PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
|
|
if (__builtin_expect (pd->tpp != NULL, 0) && pd->tpp->priomax > prio)
|
|
param.sched_priority = pd->tpp->priomax;
|
|
|
|
/* Try to set the scheduler information. */
|
|
if (__builtin_expect (sched_setparam (pd->tid, ¶m) == -1, 0))
|
|
result = errno;
|
|
else
|
|
{
|
|
/* We succeeded changing the kernel information. Reflect this
|
|
change in the thread descriptor. */
|
|
param.sched_priority = prio;
|
|
memcpy (&pd->schedparam, ¶m, sizeof (struct sched_param));
|
|
pd->flags |= ATTR_FLAG_SCHED_SET;
|
|
}
|
|
|
|
lll_unlock (pd->lock);
|
|
|
|
pthread_cleanup_pop (0);
|
|
|
|
return result;
|
|
}
|