xnu-2050.18.24.tar.gz

[apple/xnu.git] / bsd / sys / msgbuf.h

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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1981, 1984, 1993
 *	The Regents of the University of California.  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 the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 *	@(#)msgbuf.h	8.1 (Berkeley) 6/2/93
 */
#ifndef	_SYS_MSGBUF_H_
#define _SYS_MSGBUF_H_

#include <sys/cdefs.h>

#define	MAX_MSG_BSIZE	(1*1024*1024)
struct	msgbuf {
#define	MSG_MAGIC	0x063061
	int		msg_magic;
	int		msg_size;
	int		msg_bufx;		/* write pointer */
	int		msg_bufr;		/* read pointer */
	char	*msg_bufc;		/* buffer */
};

#ifdef XNU_KERNEL_PRIVATE
__BEGIN_DECLS
extern struct	msgbuf *msgbufp;
extern void log_putc(char);
extern void log_putc_locked(char);
extern int log_setsize(int size);
extern int log_dmesg(user_addr_t, uint32_t, int32_t *);
__END_DECLS
#endif /* XNU_KERNEL_PRIVATE */

#endif	/* !_SYS_MSGBUF_H_ */