1 /* Test detachability.
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 #include <unistd.h>
26
27 void *
thread(void * arg)28 thread (void *arg)
29 {
30 while (1)
31 sched_yield ();
32 }
33
34 int
main(int argc,char ** argv)35 main (int argc, char **argv)
36 {
37 int err;
38 pthread_t tid;
39 void *ret;
40
41 err = pthread_create (&tid, 0, thread, 0);
42 if (err)
43 error (1, err, "pthread_create");
44
45 err = pthread_detach (tid);
46 if (err)
47 error (1, err, "pthread_detach");
48
49 err = pthread_detach (tid);
50 assert (err == EINVAL);
51
52 err = pthread_join (tid, &ret);
53 assert (err == EINVAL);
54
55 return 0;
56 }
57