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33574c17 | 1 | /* Thread attributes retrieval. |
d614a753 | 2 | Copyright (C) 2008-2020 Free Software Foundation, Inc. |
33574c17 ST |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
ad2b41bf ST |
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. | |
33574c17 ST |
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 | |
ad2b41bf | 13 | Lesser General Public License for more details. |
33574c17 | 14 | |
ad2b41bf ST |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
33574c17 ST |
18 | |
19 | #include <assert.h> | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | ||
23 | #include <pt-internal.h> | |
24 | ||
25 | /* Initialize thread attribute *ATTR with attributes corresponding to the | |
26 | already running thread THREAD. It shall be called on an uninitialized ATTR | |
27 | and destroyed with pthread_attr_destroy when no longer needed. */ | |
28 | int | |
29 | __pthread_getattr_np (pthread_t thread, pthread_attr_t *attr) | |
30 | { | |
31 | struct __pthread *pthread; | |
32 | ||
33 | pthread = __pthread_getid (thread); | |
34 | if (pthread == NULL) | |
35 | return ESRCH; | |
36 | ||
37 | /* Some attributes (schedparam, inheritsched, contentionscope and schedpolicy) | |
38 | are not supported yet, so fill them with our default values. */ | |
39 | *attr = __pthread_default_attr; | |
40 | ||
a04549c1 JM |
41 | attr->__stackaddr = (pthread->stackaddr |
42 | + ((pthread->guardsize + __vm_page_size - 1) | |
43 | / __vm_page_size * __vm_page_size)); | |
33574c17 ST |
44 | attr->__stacksize = pthread->stacksize; |
45 | attr->__guardsize = pthread->guardsize; | |
46 | attr->__detachstate = (pthread->state == PTHREAD_DETACHED | |
47 | ? PTHREAD_CREATE_DETACHED : PTHREAD_CREATE_JOINABLE); | |
48 | ||
49 | return 0; | |
50 | } | |
51 | weak_alias (__pthread_getattr_np, pthread_getattr_np) |