1/*	$NetBSD: vmbuf.h,v 1.4 2006/09/09 16:22:10 manu Exp $	*/
2
3/* Id: vmbuf.h,v 1.4 2005/10/30 10:28:44 vanhu Exp */
4
5/*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef _VMBUF_H
35#define _VMBUF_H
36
37/*
38 *	bp      v
39 *	v       v
40 *	........................
41 *	        <--------------> l
42 *	<----------------------> bl
43 */
44typedef struct _vchar_t_ {
45#if notyet
46	u_int32_t t;	/* type of the value */
47	vchar_t *n;	/* next vchar_t buffer */
48	size_t bl;	/* length of the buffer */
49	caddr_t bp;	/* pointer to the buffer */
50#endif
51	size_t l;	/* length of the value */
52	caddr_t v;	/* place holder to the pointer to the value */
53} vchar_t;
54
55#define VPTRINIT(p) \
56do { \
57	if (p) { \
58		vfree(p); \
59		(p) = NULL; \
60	} \
61} while(0);
62
63#if defined(__APPLE__) && defined(__MACH__)
64/* vfree is already defined in Apple's system libraries */
65#define vfree   vmbuf_free
66#endif
67
68extern vchar_t *vmalloc __P((size_t));
69extern vchar_t *vrealloc __P((vchar_t *, size_t));
70extern void vfree __P((vchar_t *));
71extern vchar_t *vdup __P((vchar_t *));
72
73#endif /* _VMBUF_H */
74