NetBSD-5.0.2/regress/sys/kern/lock/lock.c

/* $NetBSD: lock.c,v 1.3 2008/04/28 20:23:06 martin Exp $ */

/*-
 * Copyright (c) 2002 The NetBSD Foundation, Inc.
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * __cpu_simple_lock/__cpu_simple_unlock regression test:
 *
 */

#include <stdio.h>
#include <signal.h>
#include <sys/time.h>

#include <machine/lock.h>

__cpu_simple_lock_t lk;
volatile int handled = 0;

void handler(int);

void
handler(int sig)
{

	handled = 1;
	__cpu_simple_unlock(&lk);
}

int
main(void)
{
	struct itimerval itv;

	__cpu_simple_lock_init(&lk);

	signal(SIGVTALRM, handler);

	itv.it_interval.tv_sec = 0;
	itv.it_interval.tv_usec = 0;
	itv.it_value.tv_sec = 1;
	itv.it_value.tv_usec = 0;
	setitimer(ITIMER_VIRTUAL, &itv, NULL);

	__cpu_simple_lock(&lk);
	__cpu_simple_lock(&lk);
	if (!handled) 
		return (1);
	__cpu_simple_unlock(&lk);

	return (0);
}