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105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
/* Test recursive mutexes.
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Copyright (C) 2000-2023 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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#define _GNU_SOURCE
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#include <pthread.h>
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#include <assert.h>
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#include <error.h>
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#include <errno.h>
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#define THREADS 10
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int foo;
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void *
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thr (void *arg)
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{
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int i;
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pthread_mutex_lock (arg);
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foo = pthread_self ();
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for (i = 0; i < 500; i++)
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pthread_mutex_lock (arg);
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for (i = 0; i < 500; i++)
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pthread_mutex_unlock (arg);
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assert (foo == pthread_self ());
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pthread_mutex_unlock (arg);
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return 0;
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}
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int
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main (int argc, char **argv)
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{
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error_t err;
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int i;
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pthread_t tid[THREADS];
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pthread_mutexattr_t mattr;
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pthread_mutex_t mutex;
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err = pthread_mutexattr_init (&mattr);
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if (err)
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error (1, err, "pthread_mutexattr_init");
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err = pthread_mutexattr_settype (&mattr, PTHREAD_MUTEX_RECURSIVE);
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if (err)
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error (1, err, "pthread_mutexattr_settype");
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err = pthread_mutex_init (&mutex, &mattr);
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if (err)
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error (1, err, "pthread_mutex_init");
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err = pthread_mutexattr_destroy (&mattr);
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if (err)
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error (1, err, "pthread_mutexattr_destroy");
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pthread_mutex_lock (&mutex);
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pthread_mutex_lock (&mutex);
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pthread_mutex_unlock (&mutex);
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pthread_mutex_unlock (&mutex);
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for (i = 0; i < THREADS; i++)
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{
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err = pthread_create (&tid[i], 0, thr, &mutex);
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if (err)
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error (1, err, "pthread_create (%d)", i);
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}
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for (i = 0; i < THREADS; i++)
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{
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void *ret;
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err = pthread_join (tid[i], &ret);
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if (err)
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error (1, err, "pthread_join");
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assert (ret == 0);
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}
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err = pthread_mutex_destroy (&mutex);
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if (err)
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error (1, err, "pthread_mutex_destroy");
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return 0;
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}
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