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0a07288b | 1 | /* C11 threads call_once test. |
d614a753 | 2 | Copyright (C) 2018-2020 Free Software Foundation, Inc. |
0a07288b AZ |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
0a07288b AZ |
18 | |
19 | #include <threads.h> | |
20 | #include <stdio.h> | |
21 | #include <unistd.h> | |
22 | ||
23 | #include <support/check.h> | |
24 | ||
25 | /* Flag that controls the first thread access. */ | |
26 | static once_flag flag = ONCE_FLAG_INIT; | |
27 | ||
28 | static int value = 0; | |
29 | ||
30 | static void | |
31 | do_once (void) | |
32 | { | |
33 | value++; | |
34 | } | |
35 | ||
36 | static int | |
37 | func (void* data) | |
38 | { | |
39 | call_once (&flag, do_once); | |
40 | thrd_exit (thrd_success); | |
41 | } | |
42 | ||
43 | #define N 20 | |
44 | ||
45 | int | |
46 | do_test (void) | |
47 | { | |
48 | thrd_t ids[N]; | |
49 | ||
50 | for (int i = 0; i < N; ++i) | |
51 | { | |
52 | if (thrd_create (&ids[i], func, NULL) != thrd_success) | |
53 | FAIL_EXIT1 ("thrd_create failed"); | |
54 | } | |
55 | ||
56 | /* Join threads. */ | |
57 | for (int i = 0; i < N; ++i) | |
58 | { | |
59 | if (thrd_join (ids[i], NULL) != thrd_success) | |
60 | FAIL_EXIT1 ("thrd_join failed"); | |
61 | } | |
62 | ||
63 | return (value != 1); | |
64 | } | |
65 | ||
66 | #include <support/test-driver.c> |