1 /* Copyright (C) 2002-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
23 #include <lowlevellock.h>
27 __pthread_setschedparam (pthread_t threadid
, int policy
,
28 const struct sched_param
*param
)
30 struct pthread
*pd
= (struct pthread
*) threadid
;
32 /* Make sure the descriptor is valid. */
33 if (INVALID_TD_P (pd
))
34 /* Not a valid thread handle. */
39 /* See CREATE THREAD NOTES in nptl/pthread_create.c. */
40 lll_lock (pd
->lock
, LLL_PRIVATE
);
43 const struct sched_param
*orig_param
= param
;
45 /* If the thread should have higher priority because of some
46 PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
47 if (__builtin_expect (pd
->tpp
!= NULL
, 0)
48 && pd
->tpp
->priomax
> param
->sched_priority
)
51 p
.sched_priority
= pd
->tpp
->priomax
;
55 /* Try to set the scheduler information. */
56 if (__builtin_expect (__sched_setscheduler (pd
->tid
, policy
,
61 /* We succeeded changing the kernel information. Reflect this
62 change in the thread descriptor. */
63 pd
->schedpolicy
= policy
;
64 memcpy (&pd
->schedparam
, orig_param
, sizeof (struct sched_param
));
65 pd
->flags
|= ATTR_FLAG_SCHED_SET
| ATTR_FLAG_POLICY_SET
;
68 lll_unlock (pd
->lock
, LLL_PRIVATE
);
72 strong_alias (__pthread_setschedparam
, pthread_setschedparam
)