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36ada9ee | 1 | /* A thread attribute with a small stack. |
d614a753 | 2 | Copyright (C) 2019-2020 Free Software Foundation, Inc. |
36ada9ee FW |
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 | |
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 | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <support/xthread.h> | |
20 | #include <allocate_once.h> | |
21 | ||
22 | static void * | |
23 | allocate (void *closure) | |
24 | { | |
25 | pthread_attr_t *result = malloc (sizeof (*result)); | |
26 | xpthread_attr_init (result); | |
27 | support_set_small_thread_stack_size (result); | |
28 | return result; | |
29 | } | |
30 | ||
31 | static void | |
32 | deallocate (void *ptr, void *closure) | |
33 | { | |
34 | xpthread_attr_destroy (ptr); | |
35 | free (ptr); | |
36 | } | |
37 | ||
38 | static void *small_stack_attr; | |
39 | ||
40 | pthread_attr_t * | |
41 | support_small_stack_thread_attribute (void) | |
42 | { | |
43 | return allocate_once (&small_stack_attr, allocate, deallocate, NULL); | |
44 | } | |
45 | ||
46 | static void __attribute__ ((destructor)) | |
47 | fini (void) | |
48 | { | |
49 | if (small_stack_attr != NULL) | |
50 | { | |
51 | deallocate (small_stack_attr, NULL); | |
52 | small_stack_attr = NULL; | |
53 | } | |
54 | } |