1 /* Wait until all threads except the current thread has exited.
2 Copyright (C) 2021-2023 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/>. */
22 #include <support/check.h>
23 #include <support/support.h>
27 support_wait_for_thread_exit (void)
30 DIR *proc_self_task
= opendir ("/proc/self/task");
31 TEST_VERIFY_EXIT (proc_self_task
!= NULL
);
36 struct dirent
*e
= readdir (proc_self_task
);
37 if (e
== NULL
&& errno
!= 0)
38 FAIL_EXIT1 ("readdir: %m");
41 /* Only the main thread remains. Testing may continue. */
42 closedir (proc_self_task
);
46 /* In some kernels, "0" entries denote a thread that has just
48 if (strcmp (e
->d_name
, ".") == 0 || strcmp (e
->d_name
, "..") == 0
49 || strcmp (e
->d_name
, "0") == 0)
52 int task_tid
= atoi (e
->d_name
);
54 FAIL_EXIT1 ("Invalid /proc/self/task entry: %s", e
->d_name
);
56 if (task_tid
== gettid ())
57 /* The current thread. Keep scanning for other
61 /* task_tid does not refer to this thread here, i.e., there is
62 another running thread. */
64 /* Small timeout to give the thread a chance to exit. */
67 /* Start scanning the directory from the start. */
68 rewinddir (proc_self_task
);
71 /* Use a large timeout because we cannot verify that the thread has
73 usleep (5 * 1000 * 1000);