mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 14:50:17 +00:00
79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
/* Test pthread_once.
|
|
Copyright (C) 2000-2020 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/>. */
|
|
|
|
#define _GNU_SOURCE
|
|
|
|
#include <pthread.h>
|
|
#include <assert.h>
|
|
#include <error.h>
|
|
#include <errno.h>
|
|
|
|
#define THREADS 10
|
|
|
|
pthread_once_t inc_var_once = PTHREAD_ONCE_INIT;
|
|
int var;
|
|
|
|
void
|
|
inc_var (void)
|
|
{
|
|
var++;
|
|
}
|
|
|
|
void *
|
|
thr (void *arg)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 500; i++)
|
|
pthread_once (&inc_var_once, inc_var);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
error_t err;
|
|
int i;
|
|
pthread_t tid[THREADS];
|
|
|
|
for (i = 0; i < THREADS; i++)
|
|
{
|
|
err = pthread_create (&tid[i], 0, thr, 0);
|
|
if (err)
|
|
error (1, err, "pthread_create (%d)", i);
|
|
}
|
|
|
|
assert (thr (0) == 0);
|
|
|
|
for (i = 0; i < THREADS; i++)
|
|
{
|
|
void *ret;
|
|
|
|
err = pthread_join (tid[i], &ret);
|
|
if (err)
|
|
error (1, err, "pthread_join");
|
|
|
|
assert (ret == 0);
|
|
}
|
|
|
|
assert (var == 1);
|
|
|
|
return 0;
|
|
}
|