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b03b0c29 | 1 | /* Copyright (C) 2002, 2003, 2004, 2006, 2007 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/>. */ | |
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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 | |
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27 | __pthread_setschedparam (threadid, policy, param) |
28 | pthread_t threadid; | |
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29 | int policy; |
30 | const struct sched_param *param; | |
31 | { | |
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32 | struct pthread *pd = (struct pthread *) threadid; |
33 | ||
34 | /* Make sure the descriptor is valid. */ | |
35 | if (INVALID_TD_P (pd)) | |
36 | /* Not a valid thread handle. */ | |
37 | return ESRCH; | |
38 | ||
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39 | int result = 0; |
40 | ||
e51deae7 | 41 | lll_lock (pd->lock, LLL_PRIVATE); |
76a50749 | 42 | |
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43 | struct sched_param p; |
44 | const struct sched_param *orig_param = param; | |
45 | ||
46 | /* If the thread should have higher priority because of some | |
47 | PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */ | |
48 | if (__builtin_expect (pd->tpp != NULL, 0) | |
49 | && pd->tpp->priomax > param->sched_priority) | |
50 | { | |
51 | p = *param; | |
52 | p.sched_priority = pd->tpp->priomax; | |
53 | param = &p; | |
54 | } | |
55 | ||
76a50749 | 56 | /* Try to set the scheduler information. */ |
8c2e9a29 | 57 | if (__builtin_expect (__sched_setscheduler (pd->tid, policy, |
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58 | param) == -1, 0)) |
59 | result = errno; | |
60 | else | |
61 | { | |
62 | /* We succeeded changing the kernel information. Reflect this | |
63 | change in the thread descriptor. */ | |
8c2e9a29 | 64 | pd->schedpolicy = policy; |
f17efcb4 | 65 | memcpy (&pd->schedparam, orig_param, sizeof (struct sched_param)); |
14ffbc83 | 66 | pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET; |
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67 | } |
68 | ||
e51deae7 | 69 | lll_unlock (pd->lock, LLL_PRIVATE); |
76a50749 | 70 | |
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71 | return result; |
72 | } | |
83614008 | 73 | strong_alias (__pthread_setschedparam, pthread_setschedparam) |