thr_attr_setguardsize.c revision 103388 
1/*
2 * Copyright (C) 2001 Jason Evans <jasone@freebsd.org>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice(s), this list of conditions and the following disclaimer
10 *    unmodified other than the allowable addition of one or more
11 *    copyright notices.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice(s), this list of conditions and the following disclaimer in
14 *    the documentation and/or other materials provided with the
15 *    distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
27 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: head/lib/libkse/thread/thr_attr_setguardsize.c 103388 2002-09-16 08:45:36Z mini $
30 */
31
32#include <sys/param.h>
33#include <errno.h>
34#include <pthread.h>
35#include "thr_private.h"
36
37__weak_reference(_pthread_attr_setguardsize, pthread_attr_setguardsize);
38
39int
40_pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize)
41{
42	int	ret;
43
44	/* Check for invalid arguments. */
45	if (attr == NULL || *attr == NULL)
46		ret = EINVAL;
47	else {
48		/*
49		 * Round guardsize up to the nearest multiple of
50		 * _pthread_page_size.
51		 */
52		if (guardsize % _pthread_page_size != 0)
53			guardsize = ((guardsize / _pthread_page_size) + 1) *
54			    _pthread_page_size;
55
56		/* Save the stack size. */
57		(*attr)->guardsize_attr = guardsize;
58		ret = 0;
59	}
60	return(ret);
61}
62