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80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/* Copyright (C) 2015-2025 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 <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <string.h>
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static pthread_once_t once = PTHREAD_ONCE_INIT;
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// Exception type thrown from the pthread_once init routine.
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struct OnceException { };
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// Test iteration counter.
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static int niter;
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static void
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init_routine (void)
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{
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if (niter < 2)
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throw OnceException ();
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}
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// Verify that an exception thrown from the pthread_once init routine
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// is propagated to the pthread_once caller and that the function can
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// be subsequently invoked to attempt the initialization again.
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static int
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do_test (void)
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{
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int result = 1;
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// Repeat three times, having the init routine throw the first two
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// times and succeed on the final attempt.
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for (niter = 0; niter != 3; ++niter) {
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try {
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int rc = pthread_once (&once, init_routine);
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if (rc)
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fprintf (stderr, "pthread_once failed: %i (%s)\n",
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rc, strerror (rc));
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if (niter < 2)
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fputs ("pthread_once unexpectedly returned without"
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" throwing an exception", stderr);
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}
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catch (OnceException) {
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if (niter > 1)
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fputs ("pthread_once unexpectedly threw", stderr);
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result = 0;
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}
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catch (...) {
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fputs ("pthread_once threw an unknown exception", stderr);
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}
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// Abort the test on the first failure.
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if (result)
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break;
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}
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return result;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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