freebsd-dev/lib/libkse/thread/thr_attr_setguardsize.c

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/*
* Copyright (C) 2001 Jason Evans <jasone@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(s), this list of conditions and the following disclaimer
* unmodified other than the allowable addition of one or more
* copyright notices.
* 2. Redistributions in binary form must reproduce the above copyright
* notice(s), 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 COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <errno.h>
#include <pthread.h>
#include "pthread_private.h"
__weak_reference(_pthread_attr_setguardsize, pthread_attr_setguardsize);
int
_pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize)
{
int ret;
/* Check for invalid arguments. */
if (attr == NULL || *attr == NULL)
ret = EINVAL;
else {
/* Round guardsize up to the nearest multiple of PAGE_SIZE. */
if (guardsize % PAGE_SIZE != 0)
guardsize = ((guardsize / PAGE_SIZE) + 1) * PAGE_SIZE;
/* Save the stack size. */
(*attr)->guardsize_attr = guardsize;
ret = 0;
}
return(ret);
}