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dff8da6b | 1 | /* Copyright (C) 2002-2024 Free Software Foundation, Inc. |
76a50749 | 2 | This file is part of the GNU C Library. |
76a50749 UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
17 | |
18 | #include <errno.h> | |
19 | #include <sched.h> | |
20 | #include <string.h> | |
21 | #include "pthreadP.h" | |
22 | #include <lowlevellock.h> | |
23 | ||
24 | ||
25 | int | |
f63f2bfd JM |
26 | __pthread_setschedparam (pthread_t threadid, int policy, |
27 | const struct sched_param *param) | |
76a50749 | 28 | { |
8c2e9a29 UD |
29 | struct pthread *pd = (struct pthread *) threadid; |
30 | ||
31 | /* Make sure the descriptor is valid. */ | |
32 | if (INVALID_TD_P (pd)) | |
33 | /* Not a valid thread handle. */ | |
34 | return ESRCH; | |
35 | ||
76a50749 UD |
36 | int result = 0; |
37 | ||
f8bf15fe | 38 | /* See CREATE THREAD NOTES in nptl/pthread_create.c. */ |
e51deae7 | 39 | lll_lock (pd->lock, LLL_PRIVATE); |
76a50749 | 40 | |
f17efcb4 UD |
41 | struct sched_param p; |
42 | const struct sched_param *orig_param = param; | |
43 | ||
44 | /* If the thread should have higher priority because of some | |
45 | PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */ | |
46 | if (__builtin_expect (pd->tpp != NULL, 0) | |
47 | && pd->tpp->priomax > param->sched_priority) | |
48 | { | |
49 | p = *param; | |
50 | p.sched_priority = pd->tpp->priomax; | |
51 | param = &p; | |
52 | } | |
53 | ||
76a50749 | 54 | /* Try to set the scheduler information. */ |
8c2e9a29 | 55 | if (__builtin_expect (__sched_setscheduler (pd->tid, policy, |
76a50749 UD |
56 | param) == -1, 0)) |
57 | result = errno; | |
58 | else | |
59 | { | |
60 | /* We succeeded changing the kernel information. Reflect this | |
61 | change in the thread descriptor. */ | |
8c2e9a29 | 62 | pd->schedpolicy = policy; |
f17efcb4 | 63 | memcpy (&pd->schedparam, orig_param, sizeof (struct sched_param)); |
14ffbc83 | 64 | pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET; |
76a50749 UD |
65 | } |
66 | ||
e51deae7 | 67 | lll_unlock (pd->lock, LLL_PRIVATE); |
76a50749 | 68 | |
76a50749 UD |
69 | return result; |
70 | } | |
83614008 | 71 | strong_alias (__pthread_setschedparam, pthread_setschedparam) |