]>
Commit | Line | Data |
---|---|---|
04277e02 | 1 | /* Copyright (C) 2002-2019 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
76a50749 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <sched.h> | |
21 | #include <string.h> | |
22 | #include "pthreadP.h" | |
23 | #include <lowlevellock.h> | |
24 | ||
25 | ||
26 | int | |
f63f2bfd JM |
27 | __pthread_setschedparam (pthread_t threadid, int policy, |
28 | const struct sched_param *param) | |
76a50749 | 29 | { |
8c2e9a29 UD |
30 | struct pthread *pd = (struct pthread *) threadid; |
31 | ||
32 | /* Make sure the descriptor is valid. */ | |
33 | if (INVALID_TD_P (pd)) | |
34 | /* Not a valid thread handle. */ | |
35 | return ESRCH; | |
36 | ||
76a50749 UD |
37 | int result = 0; |
38 | ||
f8bf15fe | 39 | /* See CREATE THREAD NOTES in nptl/pthread_create.c. */ |
e51deae7 | 40 | lll_lock (pd->lock, LLL_PRIVATE); |
76a50749 | 41 | |
f17efcb4 UD |
42 | struct sched_param p; |
43 | const struct sched_param *orig_param = param; | |
44 | ||
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) | |
49 | { | |
50 | p = *param; | |
51 | p.sched_priority = pd->tpp->priomax; | |
52 | param = &p; | |
53 | } | |
54 | ||
76a50749 | 55 | /* Try to set the scheduler information. */ |
8c2e9a29 | 56 | if (__builtin_expect (__sched_setscheduler (pd->tid, policy, |
76a50749 UD |
57 | param) == -1, 0)) |
58 | result = errno; | |
59 | else | |
60 | { | |
61 | /* We succeeded changing the kernel information. Reflect this | |
62 | change in the thread descriptor. */ | |
8c2e9a29 | 63 | pd->schedpolicy = policy; |
f17efcb4 | 64 | memcpy (&pd->schedparam, orig_param, sizeof (struct sched_param)); |
14ffbc83 | 65 | pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET; |
76a50749 UD |
66 | } |
67 | ||
e51deae7 | 68 | lll_unlock (pd->lock, LLL_PRIVATE); |
76a50749 | 69 | |
76a50749 UD |
70 | return result; |
71 | } | |
83614008 | 72 | strong_alias (__pthread_setschedparam, pthread_setschedparam) |