| 1 | /* $OpenBSD: msgbuf.h,v 1.13 2020/10/25 10:55:42 visa Exp $ */ |
| 2 | /* $NetBSD: msgbuf.h,v 1.8 1995/03/26 20:24:27 jtc Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1981, 1984, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | * |
| 32 | * @(#)msgbuf.h 8.1 (Berkeley) 6/2/93 |
| 33 | */ |
| 34 | |
| 35 | /* |
| 36 | * Locking: |
| 37 | * I immutable after creation |
| 38 | * L log_mtx |
| 39 | * Lw log_mtx for writing |
| 40 | */ |
| 41 | struct msgbuf { |
| 42 | #define MSG_MAGIC 0x063061 |
| 43 | long msg_magic; /* [I] buffer magic value */ |
| 44 | long msg_bufx; /* [L] write pointer */ |
| 45 | long msg_bufr; /* [L] read pointer */ |
| 46 | long msg_bufs; /* [I] real msg_bufc size (bytes) */ |
| 47 | long msg_bufd; /* [L] number of dropped bytes */ |
| 48 | char msg_bufc[1]; /* [Lw] buffer */ |
| 49 | }; |
| 50 | #ifdef _KERNEL |
| 51 | #define CONSBUFSIZE (16 * 1024) /* console message buffer size */ |
| 52 | extern struct msgbuf *msgbufp; |
| 53 | extern struct msgbuf *consbufp; |
| 54 | |
| 55 | void initmsgbuf(caddr_t buf, size_t bufsize); |
| 56 | void initconsbuf(void); |
| 57 | void msgbuf_putchar(struct msgbuf *, const char c); |
| 58 | #endif |