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33574c17 | 1 | /* Test pthread_once. |
2b778ceb | 2 | Copyright (C) 2000-2021 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 | #define _GNU_SOURCE | |
20 | ||
21 | #include <pthread.h> | |
22 | #include <assert.h> | |
23 | #include <error.h> | |
24 | #include <errno.h> | |
25 | ||
26 | #define THREADS 10 | |
27 | ||
28 | pthread_once_t inc_var_once = PTHREAD_ONCE_INIT; | |
29 | int var; | |
30 | ||
31 | void | |
32 | inc_var (void) | |
33 | { | |
34 | var++; | |
35 | } | |
36 | ||
37 | void * | |
38 | thr (void *arg) | |
39 | { | |
40 | int i; | |
41 | ||
42 | for (i = 0; i < 500; i++) | |
43 | pthread_once (&inc_var_once, inc_var); | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | int | |
49 | main (int argc, char **argv) | |
50 | { | |
51 | error_t err; | |
52 | int i; | |
53 | pthread_t tid[THREADS]; | |
54 | ||
55 | for (i = 0; i < THREADS; i++) | |
56 | { | |
57 | err = pthread_create (&tid[i], 0, thr, 0); | |
58 | if (err) | |
59 | error (1, err, "pthread_create (%d)", i); | |
60 | } | |
61 | ||
62 | assert (thr (0) == 0); | |
63 | ||
64 | for (i = 0; i < THREADS; i++) | |
65 | { | |
66 | void *ret; | |
67 | ||
68 | err = pthread_join (tid[i], &ret); | |
69 | if (err) | |
70 | error (1, err, "pthread_join"); | |
71 | ||
72 | assert (ret == 0); | |
73 | } | |
74 | ||
75 | assert (var == 1); | |
76 | ||
77 | return 0; | |
78 | } |