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1/* C11 threads call_once test.
2 Copyright (C) 2018-2019 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 <http://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. */
26static once_flag flag = ONCE_FLAG_INIT;
27
28static int value = 0;
29
30static void
31do_once (void)
32{
33 value++;
34}
35
36static int
37func (void* data)
38{
39 call_once (&flag, do_once);
40 thrd_exit (thrd_success);
41}
42
43#define N 20
44
45int
46do_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>
67

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