1/* Copyright (C) 2002-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library 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 GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <pthread.h>
19#include <stdio.h>
20
21
22static pthread_once_t once = PTHREAD_ONCE_INIT;
23
24static int global;
25
26static void
27once_handler (void)
28{
29 ++global;
30}
31
32
33static int
34do_test (void)
35{
36 pthread_once (once_control: &once, init_routine: once_handler);
37 pthread_once (once_control: &once, init_routine: once_handler);
38
39 if (global != 1)
40 {
41 printf (format: "global = %d, expected 1\n", global);
42 return 1;
43 }
44
45 return 0;
46}
47
48#define TEST_FUNCTION do_test ()
49#include "../test-skeleton.c"
50

source code of glibc/sysdeps/pthread/tst-once1.c