1 /* Wait until all threads except the current thread has exited.
2 Copyright (C) 2021-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
23 #include <support/check.h>
24 #include <support/support.h>
28 support_wait_for_thread_exit (void)
31 DIR *proc_self_task
= opendir ("/proc/self/task");
32 TEST_VERIFY_EXIT (proc_self_task
!= NULL
);
37 struct dirent
*e
= readdir (proc_self_task
);
38 if (e
== NULL
&& errno
!= 0)
39 FAIL_EXIT1 ("readdir: %m");
42 /* Only the main thread remains. Testing may continue. */
43 closedir (proc_self_task
);
47 /* In some kernels, "0" entries denote a thread that has just
49 if (strcmp (e
->d_name
, ".") == 0 || strcmp (e
->d_name
, "..") == 0
50 || strcmp (e
->d_name
, "0") == 0)
53 int task_tid
= atoi (e
->d_name
);
55 FAIL_EXIT1 ("Invalid /proc/self/task entry: %s", e
->d_name
);
57 if (task_tid
== gettid ())
58 /* The current thread. Keep scanning for other
62 /* task_tid does not refer to this thread here, i.e., there is
63 another running thread. */
65 /* Small timeout to give the thread a chance to exit. */
68 /* Start scanning the directory from the start. */
69 rewinddir (proc_self_task
);
72 /* Use a large timeout because we cannot verify that the thread has
74 usleep (5 * 1000 * 1000);