76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* Wait until all threads except the current thread has exited.
|
|
Copyright (C) 2021-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/support.h>
|
|
#include <unistd.h>
|
|
|
|
void
|
|
support_wait_for_thread_exit (void)
|
|
{
|
|
#ifdef __linux__
|
|
DIR *proc_self_task = opendir ("/proc/self/task");
|
|
TEST_VERIFY_EXIT (proc_self_task != NULL);
|
|
|
|
while (true)
|
|
{
|
|
errno = 0;
|
|
struct dirent *e = readdir (proc_self_task);
|
|
if (e == NULL && errno != 0)
|
|
FAIL_EXIT1 ("readdir: %m");
|
|
if (e == NULL)
|
|
{
|
|
/* Only the main thread remains. Testing may continue. */
|
|
closedir (proc_self_task);
|
|
return;
|
|
}
|
|
|
|
/* In some kernels, "0" entries denote a thread that has just
|
|
exited. */
|
|
if (strcmp (e->d_name, ".") == 0 || strcmp (e->d_name, "..") == 0
|
|
|| strcmp (e->d_name, "0") == 0)
|
|
continue;
|
|
|
|
int task_tid = atoi (e->d_name);
|
|
if (task_tid <= 0)
|
|
FAIL_EXIT1 ("Invalid /proc/self/task entry: %s", e->d_name);
|
|
|
|
if (task_tid == gettid ())
|
|
/* The current thread. Keep scanning for other
|
|
threads. */
|
|
continue;
|
|
|
|
/* task_tid does not refer to this thread here, i.e., there is
|
|
another running thread. */
|
|
|
|
/* Small timeout to give the thread a chance to exit. */
|
|
usleep (50 * 1000);
|
|
|
|
/* Start scanning the directory from the start. */
|
|
rewinddir (proc_self_task);
|
|
}
|
|
#else
|
|
/* Use a large timeout because we cannot verify that the thread has
|
|
exited. */
|
|
usleep (5 * 1000 * 1000);
|
|
#endif
|
|
}
|