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67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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/* C11 threads call_once test.
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Copyright (C) 2018 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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<http://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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/* Flag that controls the first thread access. */
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static once_flag flag = ONCE_FLAG_INIT;
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static int value = 0;
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static void
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do_once (void)
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{
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value++;
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}
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static int
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func (void* data)
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{
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call_once (&flag, do_once);
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thrd_exit (thrd_success);
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}
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#define N 20
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int
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do_test (void)
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{
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thrd_t ids[N];
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for (int i = 0; i < N; ++i)
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{
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if (thrd_create (&ids[i], func, NULL) != thrd_success)
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FAIL_EXIT1 ("thrd_create failed");
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}
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/* Join threads. */
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for (int i = 0; i < N; ++i)
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{
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if (thrd_join (ids[i], NULL) != thrd_success)
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FAIL_EXIT1 ("thrd_join failed");
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}
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return (value != 1);
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}
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#include <support/test-driver.c>
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