mirror of git://sourceware.org/git/glibc.git
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/* Wait until all threads except the current thread has exited.
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Copyright (C) 2021-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dirent.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <unistd.h>
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void
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support_wait_for_thread_exit (void)
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{
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#ifdef __linux__
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DIR *proc_self_task = opendir ("/proc/self/task");
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TEST_VERIFY_EXIT (proc_self_task != NULL);
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while (true)
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{
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errno = 0;
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struct dirent *e = readdir (proc_self_task);
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if (e == NULL && errno != 0)
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FAIL_EXIT1 ("readdir: %m");
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if (e == NULL)
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{
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/* Only the main thread remains. Testing may continue. */
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closedir (proc_self_task);
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return;
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}
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/* In some kernels, "0" entries denote a thread that has just
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exited. */
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if (strcmp (e->d_name, ".") == 0 || strcmp (e->d_name, "..") == 0
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|| strcmp (e->d_name, "0") == 0)
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continue;
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int task_tid = atoi (e->d_name);
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if (task_tid <= 0)
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FAIL_EXIT1 ("Invalid /proc/self/task entry: %s", e->d_name);
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if (task_tid == gettid ())
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/* The current thread. Keep scanning for other
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threads. */
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continue;
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/* task_tid does not refer to this thread here, i.e., there is
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another running thread. */
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/* Small timeout to give the thread a chance to exit. */
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usleep (50 * 1000);
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/* Start scanning the directory from the start. */
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rewinddir (proc_self_task);
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}
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#else
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/* Use a large timeout because we cannot verify that the thread has
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exited. */
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usleep (5 * 1000 * 1000);
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#endif
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}
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