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74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/* C11 threads basic mutex tests.
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Copyright (C) 2018-2020 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 mutex between child and parent. */
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static mtx_t mutex;
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/* Shared counter to check possible race conditions. */
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static int counter;
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static int
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child_add (void *arg)
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{
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if (mtx_lock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_lock failed");
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counter++;
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if (mtx_unlock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_unlock failed");
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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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mtx_init (&mutex, mtx_plain);
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thrd_t id;
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if (thrd_create (&id, child_add, NULL) != thrd_success)
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FAIL_EXIT1 ("thrd_create failed");
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if (mtx_lock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_lock failed");
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counter++;
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if (mtx_unlock (&mutex) != thrd_success)
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FAIL_EXIT1 ("mtx_unlock failed");
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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 (counter != 2)
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FAIL_EXIT1 ("counter (%d) != 2", counter);
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mtx_destroy (&mutex);
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return 0;
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}
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#include <support/test-driver.c>
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