vmbuf.h revision 1.1.1.1 
1/* $Id: vmbuf.h,v 1.1.1.1 2005/02/12 11:13:09 manu Exp $ */
2
3/*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef _VMBUF_H
33#define _VMBUF_H
34
35/*
36 *	bp      v
37 *	v       v
38 *	........................
39 *	        <--------------> l
40 *	<----------------------> bl
41 */
42typedef struct _vchar_t_ {
43#if notyet
44	u_int32_t t;	/* type of the value */
45	vchar_t *n;	/* next vchar_t buffer */
46	size_t bl;	/* length of the buffer */
47	caddr_t bp;	/* pointer to the buffer */
48#endif
49	size_t l;	/* length of the value */
50	caddr_t v;	/* place holder to the pointer to the value */
51} vchar_t;
52
53#define VPTRINIT(p) \
54do { \
55	if (p) { \
56		vfree(p); \
57		(p) = NULL; \
58	} \
59} while(0);
60
61extern vchar_t *vmalloc __P((size_t));
62extern vchar_t *vrealloc __P((vchar_t *, size_t));
63extern void vfree __P((vchar_t *));
64extern vchar_t *vdup __P((vchar_t *));
65
66#endif /* _VMBUF_H */
67