#!/bin/sh
#
# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
. ../default.cfg
odir=`pwd`
cd /tmp
sed '1,/^EOF/d' < $odir/$0 > kevent2.c
mycc -o kevent2 -Wall kevent2.c -pthread || exit 1
rm -f kevent2.c
cd $RUNDIR
for i in `jot 10`; do
for j in `jot 12`; do
/tmp/kevent2 > /dev/null 2>&1 &
done
wait
done
rm -f /tmp/kevent2
exit
EOF
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include <err.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
static int waiting;
static int fd1[2];
static int fd2[2];
static int fd3[2];
static void *
thr1(void *arg)
{
struct kevent ev[3];
struct timespec ts;
int kq, n, r;
if ((kq = kqueue()) < 0)
err(1, "kqueue(). %s:%d", __FILE__, __LINE__);
n = 0;
EV_SET(&ev[n], fd1[1], EVFILT_WRITE,
EV_ADD | EV_ENABLE | EV_CLEAR, 0, 0, 0);
n++;
EV_SET(&ev[n], fd2[1], EVFILT_WRITE,
EV_ADD | EV_ENABLE | EV_CLEAR, 0, 0, 0);
n++;
EV_SET(&ev[n], fd3[1], EVFILT_WRITE,
EV_ADD | EV_ENABLE | EV_CLEAR, 0, 0, 0);
n++;
if (kevent(kq, ev, n, NULL, 0, NULL) < 0)
err(1, "kevent(). %s:%d", __FILE__, __LINE__);
if ((r = pthread_mutex_lock(&mutex)) != 0)
errc(1, r, "pthread_mutex_lock");
waiting = 0;
if ((r = pthread_cond_signal(&cond)) != 0)
errc(1, r, "pthread_cond_signal");
if ((r = pthread_mutex_unlock(&mutex)) != 0)
errc(1, r, "pthread_mutex_unlock");
n = 0;
EV_SET(&ev[n], fd1[1], EVFILT_WRITE,
EV_DELETE, 0, 0, 0);
n++;
ts.tv_sec = 0;
ts.tv_nsec = 0;
if (kevent(kq, ev, n, NULL, 0, &ts) < 0)
err(1, "kevent(). %s:%d", __FILE__, __LINE__);
close(kq);
close(fd1[1]);
close(fd2[1]);
close(fd3[1]);
return (0);
}
static void *
thr2(void *arg)
{
int r;
if ((r = pthread_mutex_lock(&mutex)) != 0)
errc(1, r, "pthread_mutex_lock");
while (waiting == 1) {
if ((r = pthread_cond_wait(&cond, &mutex)) != 0)
errc(1, r, "pthread_cond_wait");
}
if ((r = pthread_mutex_unlock(&mutex)) != 0)
errc(1, r, "pthread_mutex_unlock");
close(fd1[0]);
close(fd2[0]);
close(fd3[0]);
return (0);
}
int
main(int argc, char **argv)
{
pthread_t threads[2];
int i, r;
for (i = 0; i < 1000; i++) {
waiting = 1;
if (pipe(fd1) == -1)
err(1, "pipe()");
if (pipe(fd2) == -1)
err(1, "pipe()");
if (pipe(fd3) == -1)
err(1, "pipe()");
if ((r = pthread_mutex_init(&mutex, 0)) != 0)
errc(1, r, "pthread_mutex_init");
if ((r = pthread_cond_init(&cond, NULL)) != 0)
errc(1, r, "pthread_cond_init");
if ((r = pthread_create(&threads[0], NULL, thr1, 0)) != 0)
errc(1, r, "pthread_create()");
if ((r = pthread_create(&threads[1], NULL, thr2, 0)) != 0)
errc(1, r, "pthread_create()");
if ((r = pthread_join(threads[0], NULL)) != 0)
errc(1, r, "pthread_join(%d)", 0);
if ((r = pthread_join(threads[1], NULL)) != 0)
errc(1, r, "pthread_join(%d)", 1);
if ((r = pthread_mutex_destroy(&mutex)) != 0)
errc(1, r, "pthread_mutex_destroy");
if ((r = pthread_cond_destroy(&cond)) != 0)
errc(1, r, "pthread_condattr_destroy");
}
return (0);
}
