1 /* Test of spin locks for communication between threads and signal handlers.
2 Copyright (C) 2005, 2008-2020 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>, 2020. */
18
19 #include <config.h>
20
21 /* Specification. */
22 #include "asyncsafe-spin.h"
23
24 #include <signal.h>
25
26 asyncsafe_spinlock_t global_spin_lock = ASYNCSAFE_SPIN_INIT;
27
28 int
main(void)29 main (void)
30 {
31 sigset_t set;
32
33 sigemptyset (&set);
34 sigaddset (&set, SIGINT);
35
36 /* Check a spin-lock initialized through the constant initializer. */
37 {
38 sigset_t saved_set;
39 asyncsafe_spin_lock (&global_spin_lock, &set, &saved_set);
40 asyncsafe_spin_unlock (&global_spin_lock, &saved_set);
41 }
42
43 /* Check a spin-lock initialized through asyncsafe_spin_init. */
44 {
45 asyncsafe_spinlock_t local_spin_lock;
46 int i;
47
48 asyncsafe_spin_init (&local_spin_lock);
49
50 for (i = 0; i < 10; i++)
51 {
52 sigset_t saved_set;
53 asyncsafe_spin_lock (&local_spin_lock, &set, &saved_set);
54 asyncsafe_spin_unlock (&local_spin_lock, &saved_set);
55 }
56
57 asyncsafe_spin_destroy (&local_spin_lock);
58 }
59
60 return 0;
61 }
62