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/* Copyright (C) 2015-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <string.h>
static pthread_once_t once = PTHREAD_ONCE_INIT;
// Exception type thrown from the pthread_once init routine.
struct OnceException { };
// Test iteration counter.
static int niter;
static void
init_routine (void)
{
if (niter < 2)
throw OnceException ();
}
// Verify that an exception thrown from the pthread_once init routine
// is propagated to the pthread_once caller and that the function can
// be subsequently invoked to attempt the initialization again.
static int
do_test (void)
{
int result = 1;
// Repeat three times, having the init routine throw the first two
// times and succeed on the final attempt.
for (niter = 0; niter != 3; ++niter) {
try {
int rc = pthread_once (&once, init_routine);
if (rc)
fprintf (stderr, "pthread_once failed: %i (%s)\n",
rc, strerror (rc));
if (niter < 2)
fputs ("pthread_once unexpectedly returned without"
" throwing an exception", stderr);
}
catch (OnceException) {
if (niter > 1)
fputs ("pthread_once unexpectedly threw", stderr);
result = 0;
}
catch (...) {
fputs ("pthread_once threw an unknown exception", stderr);
}
// Abort the test on the first failure.
if (result)
break;
}
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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