xnu-4570.41.2.tar.gz

[apple/xnu.git] / tools / tests / libMicro / setcontext.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the "License").  You may not use this file except
 * in compliance with the License.
 *
 * You can obtain a copy of the license at
 * src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * HEADER in each file and include the License file at
 * usr/src/OPENSOLARIS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your
 * own identifying information: Portions Copyright [yyyy]
 * [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ucontext.h>

#include "libmicro.h"

int
benchmark_init()
{

	(void) sprintf(lm_usage, "notes: measures setcontext()\n");

	lm_tsdsize = 0;

	return (0);
}

/*ARGSUSED*/
int
benchmark(void *tsd, result_t *res)
{
	volatile int		i;

	ucontext_t uc;

	i = 0;

	(void) getcontext(&uc);

	if (i++ < lm_optB)
		(void) setcontext(&uc);

	res->re_count += lm_optB;

	return (0);
}