1 /* Test error checking mutexes.
2 Copyright (C) 2000-2022 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 #define _GNU_SOURCE
20
21 #include <pthread.h>
22 #include <assert.h>
23 #include <error.h>
24 #include <errno.h>
25
26 int
main(int argc,char ** argv)27 main (int argc, char **argv)
28 {
29 error_t err;
30 pthread_mutexattr_t mattr;
31 pthread_mutex_t mutex;
32
33 err = pthread_mutexattr_init (&mattr);
34 if (err)
35 error (1, err, "pthread_mutexattr_init");
36
37 err = pthread_mutexattr_settype (&mattr, PTHREAD_MUTEX_ERRORCHECK);
38 if (err)
39 error (1, err, "pthread_mutexattr_settype");
40
41 err = pthread_mutex_init (&mutex, &mattr);
42 if (err)
43 error (1, err, "pthread_mutex_init");
44
45 err = pthread_mutexattr_destroy (&mattr);
46 if (err)
47 error (1, err, "pthread_mutexattr_destroy");
48
49 err = pthread_mutex_lock (&mutex);
50 assert (err == 0);
51
52 err = pthread_mutex_lock (&mutex);
53 assert (err == EDEADLK);
54
55 err = pthread_mutex_unlock (&mutex);
56 assert (err == 0);
57
58 err = pthread_mutex_unlock (&mutex);
59 assert (err == EPERM);
60
61 return 0;
62 }
63