1 /* Test of once-only execution in multithreaded situations.
2 Copyright (C) 2018 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Bruno Haible <bruno@clisp.org>, 2018. */
18
19 #include <config.h>
20
21 #include "glthread/lock.h"
22
23 #include "macros.h"
24
25 gl_once_define(static, a_once)
26
27 static int a;
28
29 static void
a_init(void)30 a_init (void)
31 {
32 a = 42;
33 }
34
35 int
main()36 main ()
37 {
38 gl_once (a_once, a_init);
39
40 ASSERT (a == 42);
41
42 return 0;
43 }
44