mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 03:20:05 +00:00
95fdc6a0f6
2002-06-19 Steven Munroe <sjmunroe@vnet.ibm.com> * Examples/ex9.c (main): Use list of children and join them. (thread): Do not call exit.
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/* Tests for pthread_barrier_* functions.
|
|
Copyright (C) 2000, 2001 Free Software Foundation, Inc.
|
|
Contributed by Kaz Kylheku <kaz@ashi.footprints.net>, 2000.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <error.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <pthread.h>
|
|
|
|
#define NUM_THREADS 10
|
|
#define NUM_ITERS 500
|
|
|
|
static void *thread (void *) __attribute__ ((__noreturn__));
|
|
static pthread_barrier_t barrier;
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
pthread_t th;
|
|
pthread_t thread_list[NUM_THREADS];
|
|
int i;
|
|
|
|
if (pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1) != 0)
|
|
error (EXIT_FAILURE, 0, "cannot initialize barrier");
|
|
|
|
for (i = 0; i < NUM_THREADS; i++)
|
|
{
|
|
if (pthread_create (&thread_list[i], NULL, thread, NULL) != 0)
|
|
error (EXIT_FAILURE, 0, "cannot create thread");
|
|
}
|
|
|
|
(void) thread (NULL);
|
|
|
|
for (i = 0; i < NUM_THREADS; i++)
|
|
{
|
|
pthread_join(thread_list[i], NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void *
|
|
thread (void *arg)
|
|
{
|
|
int i;
|
|
pthread_t self = pthread_self ();
|
|
static pthread_t last_serial_thread;
|
|
static int linecount; /* protected by flockfile(stdout) */
|
|
|
|
for (i = 0; i < NUM_ITERS; i++)
|
|
{
|
|
switch (pthread_barrier_wait (&barrier))
|
|
{
|
|
case 0:
|
|
flockfile (stdout);
|
|
printf ("%04d: non-serial thread %lu\n", ++linecount,
|
|
(unsigned long) self);
|
|
funlockfile (stdout);
|
|
break;
|
|
case PTHREAD_BARRIER_SERIAL_THREAD:
|
|
flockfile (stdout);
|
|
printf ("%04d: serial thread %lu\n", ++linecount,
|
|
(unsigned long) self);
|
|
funlockfile (stdout);
|
|
last_serial_thread = self;
|
|
break;
|
|
default:
|
|
/* Huh? */
|
|
error (EXIT_FAILURE, 0, "unexpected return value from barrier wait");
|
|
}
|
|
}
|
|
|
|
if (pthread_equal (self, last_serial_thread))
|
|
{
|
|
flockfile (stdout);
|
|
printf ("%04d: last serial thread %lu terminating process\n",
|
|
++linecount, (unsigned long) self);
|
|
funlockfile (stdout);
|
|
return;
|
|
}
|
|
|
|
pthread_exit(NULL);
|
|
}
|