126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/* $NetBSD: mem.c,v 1.7 2004/06/20 22:20:16 jmc Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1994, 1995 Jochen Pohl
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Jochen Pohl for
|
|
* The NetBSD Project.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
|
|
*/
|
|
|
|
#if HAVE_NBTOOL_CONFIG_H
|
|
#include "nbtool_config.h"
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(__RCSID) && !defined(lint)
|
|
__RCSID("$NetBSD: mem.c,v 1.7 2004/06/20 22:20:16 jmc Exp $");
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/mman.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "lint.h"
|
|
|
|
void *
|
|
xmalloc(size_t s)
|
|
{
|
|
void *p;
|
|
|
|
if ((p = malloc(s)) == NULL)
|
|
nomem();
|
|
return (p);
|
|
}
|
|
|
|
void *
|
|
xcalloc(size_t n, size_t s)
|
|
{
|
|
void *p;
|
|
|
|
if ((p = calloc(n, s)) == NULL)
|
|
nomem();
|
|
return (p);
|
|
}
|
|
|
|
void *
|
|
xrealloc(void *p, size_t s)
|
|
{
|
|
void *n;
|
|
|
|
if ((n = realloc(p, s)) == NULL) {
|
|
free(p);
|
|
nomem();
|
|
}
|
|
p = n;
|
|
return (p);
|
|
}
|
|
|
|
char *
|
|
xstrdup(const char *s)
|
|
{
|
|
char *s2;
|
|
|
|
if ((s2 = strdup(s)) == NULL)
|
|
nomem();
|
|
return (s2);
|
|
}
|
|
|
|
void
|
|
nomem(void)
|
|
{
|
|
|
|
errx(1, "virtual memory exhausted");
|
|
}
|
|
|
|
#if defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
|
|
#define MAP_ANON MAP_ANONYMOUS
|
|
#endif
|
|
|
|
void *
|
|
xmapalloc(size_t len)
|
|
{
|
|
static const int prot = PROT_READ | PROT_WRITE;
|
|
static int fd = -1;
|
|
void *p;
|
|
#ifdef MAP_ANON
|
|
static const int flags = MAP_ANON | MAP_PRIVATE;
|
|
#else
|
|
static const int flags = MAP_PRIVATE;
|
|
|
|
if (fd == -1) {
|
|
if ((fd = open("/dev/zero", O_RDWR)) == -1)
|
|
err(1, "Cannot open `/dev/zero'");
|
|
}
|
|
#endif
|
|
p = mmap(NULL, len, prot, flags, fd, (off_t)0);
|
|
if (p == (void *)-1)
|
|
err(1, "Cannot map memory for %lu bytes", (unsigned long)len);
|
|
return p;
|
|
}
|