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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 | 17 | |
8c2e9a29 | 18 | #include <errno.h> |
76a50749 UD |
19 | #include <string.h> |
20 | #include "pthreadP.h" | |
21 | #include <lowlevellock.h> | |
22 | ||
23 | ||
24 | int | |
f63f2bfd JM |
25 | __pthread_getschedparam (pthread_t threadid, int *policy, |
26 | struct sched_param *param) | |
76a50749 | 27 | { |
8c2e9a29 UD |
28 | struct pthread *pd = (struct pthread *) threadid; |
29 | ||
30 | /* Make sure the descriptor is valid. */ | |
31 | if (INVALID_TD_P (pd)) | |
32 | /* Not a valid thread handle. */ | |
33 | return ESRCH; | |
76a50749 | 34 | |
14ffbc83 UD |
35 | int result = 0; |
36 | ||
f8bf15fe | 37 | /* See CREATE THREAD NOTES in nptl/pthread_create.c. */ |
e51deae7 | 38 | lll_lock (pd->lock, LLL_PRIVATE); |
76a50749 UD |
39 | |
40 | /* The library is responsible for maintaining the values at all | |
c0c3f78a | 41 | times. If the user uses an interface other than |
76a50749 | 42 | pthread_setschedparam to modify the scheduler setting it is not |
14ffbc83 UD |
43 | the library's problem. In case the descriptor's values have |
44 | not yet been retrieved do it now. */ | |
45 | if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0) | |
46 | { | |
47 | if (__sched_getparam (pd->tid, &pd->schedparam) != 0) | |
48 | result = 1; | |
49 | else | |
50 | pd->flags |= ATTR_FLAG_SCHED_SET; | |
51 | } | |
52 | ||
53 | if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0) | |
54 | { | |
55 | pd->schedpolicy = __sched_getscheduler (pd->tid); | |
56 | if (pd->schedpolicy == -1) | |
57 | result = 1; | |
58 | else | |
59 | pd->flags |= ATTR_FLAG_POLICY_SET; | |
60 | } | |
61 | ||
62 | if (result == 0) | |
63 | { | |
64 | *policy = pd->schedpolicy; | |
65 | memcpy (param, &pd->schedparam, sizeof (struct sched_param)); | |
66 | } | |
76a50749 | 67 | |
e51deae7 | 68 | lll_unlock (pd->lock, LLL_PRIVATE); |
76a50749 | 69 | |
14ffbc83 | 70 | return result; |
76a50749 | 71 | } |
d12506b2 | 72 | libc_hidden_def (__pthread_getschedparam) |
83614008 | 73 | strong_alias (__pthread_getschedparam, pthread_getschedparam) |