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83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/* Threaded test the pthread_spin_trylock function.
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Copyright (C) 2024-2025 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 <stdio.h>
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#include <errno.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xunistd.h>
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#include <support/xthread.h>
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pthread_spinlock_t lock;
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void *
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thread (void *arg)
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{
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int ret;
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int thr_id = *(int *) arg;
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ret = pthread_spin_trylock (&lock);
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if (thr_id == 1)
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/* thread with already acquired lock. */
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{
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if (ret != EBUSY)
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{
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FAIL_EXIT1 ("pthread_spin_trylock should fail with EBUSY");
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}
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}
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else if (thr_id == 2)
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/* thread with released spin lock. */
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{
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if (ret != 0)
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{
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FAIL_EXIT1 ("pthread_spin_trylock should be able to acquire lock");
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}
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}
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return NULL;
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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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pthread_t thr1, thr2;
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int ret;
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int thr1_id = 1, thr2_id = 2;
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pthread_spin_init (&lock, PTHREAD_PROCESS_PRIVATE);
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/* lock spin in main thread. */
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ret = pthread_spin_trylock (&lock);
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if (ret != 0)
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{
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FAIL_EXIT1 ("Main thread should be able to acquire spin lock");
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}
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/* create first thread to try locking already acquired spin lock. */
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thr1 = xpthread_create (NULL, thread, &thr1_id);
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xpthread_join (thr1);
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/* release spin lock and create thread to acquire released spin lock. */
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pthread_spin_unlock (&lock);
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thr2 = xpthread_create (NULL, thread, &thr2_id);
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xpthread_join (thr2);
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pthread_spin_destroy (&lock);
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return 0;
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}
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#include <support/test-driver.c>
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