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81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/* C11 threads condition variable tests.
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Copyright (C) 2018-2024 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 <threads.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <support/check.h>
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/* Shared condition variable between child and parent. */
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static cnd_t cond;
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/* Mutex needed to signal and wait threads. */
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static mtx_t mutex;
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static int
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signal_parent (void)
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{
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/* Acquire the lock so that cnd_signal does not run until
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cnd_timedwait has been called. */
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if (mtx_lock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_lock failed");
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if (cnd_signal (&cond) != thrd_success)
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FAIL_EXIT1 ("cnd_signal");
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if (mtx_unlock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_unlock");
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thrd_exit (thrd_success);
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}
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static int
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do_test (void)
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{
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thrd_t id;
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if (cnd_init (&cond) != thrd_success)
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FAIL_EXIT1 ("cnd_init failed");
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if (mtx_init (&mutex, mtx_plain) != thrd_success)
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FAIL_EXIT1 ("mtx_init failed");
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if (mtx_lock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_lock failed");
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if (thrd_create (&id, (thrd_start_t) signal_parent, NULL)
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!= thrd_success)
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FAIL_EXIT1 ("thrd_create failed");
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if (cnd_wait (&cond, &mutex) != thrd_success)
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FAIL_EXIT1 ("cnd_wait failed");
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/* Joining is not mandatory here, but still done to assure child thread
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ends correctly. */
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if (thrd_join (id, NULL) != thrd_success)
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FAIL_EXIT1 ("thrd_join failed");
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if (mtx_unlock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_unlock");
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mtx_destroy (&mutex);
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cnd_destroy (&cond);
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return 0;
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}
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#include <support/test-driver.c>
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