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688903eb | 1 | /* Copyright (C) 2002-2018 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 | 18 | |
8c2e9a29 | 19 | #include <errno.h> |
76a50749 UD |
20 | #include <string.h> |
21 | #include "pthreadP.h" | |
22 | #include <lowlevellock.h> | |
23 | ||
24 | ||
25 | int | |
f63f2bfd JM |
26 | __pthread_getschedparam (pthread_t threadid, int *policy, |
27 | 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; | |
76a50749 | 35 | |
14ffbc83 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 UD |
40 | |
41 | /* The library is responsible for maintaining the values at all | |
c0c3f78a | 42 | times. If the user uses an interface other than |
76a50749 | 43 | pthread_setschedparam to modify the scheduler setting it is not |
14ffbc83 UD |
44 | the library's problem. In case the descriptor's values have |
45 | not yet been retrieved do it now. */ | |
46 | if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0) | |
47 | { | |
48 | if (__sched_getparam (pd->tid, &pd->schedparam) != 0) | |
49 | result = 1; | |
50 | else | |
51 | pd->flags |= ATTR_FLAG_SCHED_SET; | |
52 | } | |
53 | ||
54 | if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0) | |
55 | { | |
56 | pd->schedpolicy = __sched_getscheduler (pd->tid); | |
57 | if (pd->schedpolicy == -1) | |
58 | result = 1; | |
59 | else | |
60 | pd->flags |= ATTR_FLAG_POLICY_SET; | |
61 | } | |
62 | ||
63 | if (result == 0) | |
64 | { | |
65 | *policy = pd->schedpolicy; | |
66 | memcpy (param, &pd->schedparam, sizeof (struct sched_param)); | |
67 | } | |
76a50749 | 68 | |
e51deae7 | 69 | lll_unlock (pd->lock, LLL_PRIVATE); |
76a50749 | 70 | |
14ffbc83 | 71 | return result; |
76a50749 | 72 | } |
83614008 | 73 | strong_alias (__pthread_getschedparam, pthread_getschedparam) |