60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <sched.h>
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#include <string.h>
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#include "pthreadP.h"
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#include <lowlevellock.h>
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int
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pthread_setschedparam (thread_id, policy, param)
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pthread_t thread_id;
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int policy;
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const struct sched_param *param;
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{
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struct pthread *thread = (struct pthread *) thread_id;
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int result = 0;
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/* We have to handle cancellation in the following code since we are
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locking another threads desriptor. */
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pthread_cleanup_push ((void (*) (void *)) lll_unlock_wake_cb, &thread->lock);
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lll_lock (thread->lock);
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/* Try to set the scheduler information. */
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if (__builtin_expect (__sched_setscheduler (thread->tid, policy,
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param) == -1, 0))
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result = errno;
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else
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{
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/* We succeeded changing the kernel information. Reflect this
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change in the thread descriptor. */
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thread->schedpolicy = policy;
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memcpy (&thread->schedparam, param, sizeof (struct sched_param));
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}
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lll_unlock (thread->lock);
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pthread_cleanup_pop (0);
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return result;
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}
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