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f303d285c8
Also return EINVAL if the thread is already terminated at the time of the call. The sched_getparam call is also replaced with a INTERNAL_SYSCALL_CALL to avoid clobbering errno. Checked on x86_64-linux-gnu.
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/* Copyright (C) 2002-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, see
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<https://www.gnu.org/licenses/>. */
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#include <libc-lock.h>
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#include <kernel-posix-cpu-timers.h>
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#include <pthreadP.h>
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static int
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setschedparam (struct pthread *pd, int policy,
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const struct sched_param *param)
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{
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/* See CREATE THREAD NOTES in nptl/pthread_create.c. */
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lll_lock (pd->lock, LLL_PRIVATE);
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struct sched_param p;
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const struct sched_param *orig_param = param;
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/* If the thread should have higher priority because of some
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PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
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if (pd->tpp != NULL && pd->tpp->priomax > param->sched_priority)
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{
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p = *param;
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p.sched_priority = pd->tpp->priomax;
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param = &p;
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}
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/* Try to set the scheduler information. */
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int r = INTERNAL_SYSCALL_CALL (sched_setscheduler, pd->tid, policy, param);
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if (r == 0)
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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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pd->schedpolicy = policy;
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memcpy (&pd->schedparam, orig_param, sizeof (struct sched_param));
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pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET;
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}
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lll_unlock (pd->lock, LLL_PRIVATE);
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return -r;
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}
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int
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__pthread_setschedparam (pthread_t threadid, int policy,
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const struct sched_param *param)
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{
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struct pthread *pd = (struct pthread *) threadid;
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/* Block all signals, as required by pd->exit_lock. */
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internal_sigset_t old_mask;
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internal_signal_block_all (&old_mask);
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__libc_lock_lock (pd->exit_lock);
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int result = pd->tid != 0 ? setschedparam (pd, policy, param) : EINVAL;
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__libc_lock_unlock (pd->exit_lock);
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internal_signal_restore_set (&old_mask);
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return result;
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}
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strong_alias (__pthread_setschedparam, pthread_setschedparam)
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