1 | /* C11 threads call_once test. |
2 | Copyright (C) 2018-2024 Free Software Foundation, Inc. |
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 <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: &flag, func: do_once); |
40 | thrd_exit (res: 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 (thr: &ids[i], func: 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 (thr: 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> |
67 | |