FreeBSD/Linux Kernel Cross Reference
sys/sys/msgbuf.h
1 /*
2 * Copyright (c) 1981, 1984, 1993
3 * The Regents of the University of California. 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, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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 * @(#)msgbuf.h 8.1 (Berkeley) 6/2/93
34 * $FreeBSD: releng/5.1/sys/sys/msgbuf.h 112732 2003-03-28 02:50:10Z iedowse $
35 */
36
37 #ifndef _SYS_MSGBUF_H_
38 #define _SYS_MSGBUF_H_
39
40 struct msgbuf {
41 #define MSG_MAGIC 0x063062
42 u_int msg_magic;
43 int msg_size; /* size of buffer area */
44 int msg_bufx; /* write pointer */
45 int msg_bufr; /* read pointer */
46 char *msg_ptr; /* pointer to buffer */
47 u_int msg_cksum; /* checksum of contents */
48 };
49
50 #ifdef _KERNEL
51 extern int msgbuftrigger;
52 extern struct msgbuf *msgbufp;
53 void msgbufinit(void *ptr, int size);
54
55 #if !defined(MSGBUF_SIZE)
56 #define MSGBUF_SIZE 32768
57 #endif
58
59 #endif
60
61 #endif
Cache object: 6c957f8e9c011e0e9ac4c8cf57fc0211
|