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Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
87 lines
3.5 KiB
C
87 lines
3.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1981, 1984, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)msgbuf.h 8.1 (Berkeley) 6/2/93
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* $FreeBSD$
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*/
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#ifndef _SYS_MSGBUF_H_
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#define _SYS_MSGBUF_H_
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#include <sys/lock.h>
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#include <sys/mutex.h>
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struct msgbuf {
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char *msg_ptr; /* pointer to buffer */
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#define MSG_MAGIC 0x063062
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u_int msg_magic;
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u_int msg_size; /* size of buffer area */
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u_int msg_wseq; /* write sequence number */
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u_int msg_rseq; /* read sequence number */
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u_int msg_cksum; /* checksum of contents */
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u_int msg_seqmod; /* range for sequence numbers */
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int msg_lastpri; /* saved priority value */
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u_int msg_flags;
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#define MSGBUF_NEEDNL 0x01 /* set when newline needed */
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struct mtx msg_lock; /* mutex to protect the buffer */
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};
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/* Normalise a sequence number or a difference between sequence numbers. */
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#define MSGBUF_SEQNORM(mbp, seq) (((seq) + (mbp)->msg_seqmod) % \
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(mbp)->msg_seqmod)
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#define MSGBUF_SEQ_TO_POS(mbp, seq) ((seq) % (mbp)->msg_size)
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/* Subtract sequence numbers. Note that only positive values result. */
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#define MSGBUF_SEQSUB(mbp, seq1, seq2) (MSGBUF_SEQNORM((mbp), (seq1) - (seq2)))
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#ifdef _KERNEL
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extern int msgbufsize;
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extern int msgbuftrigger;
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extern struct msgbuf *msgbufp;
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extern struct mtx msgbuf_lock;
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void msgbufinit(void *ptr, int size);
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void msgbuf_addchar(struct msgbuf *mbp, int c);
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void msgbuf_addstr(struct msgbuf *mbp, int pri, char *str, int filter_cr);
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void msgbuf_clear(struct msgbuf *mbp);
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void msgbuf_copy(struct msgbuf *src, struct msgbuf *dst);
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int msgbuf_getbytes(struct msgbuf *mbp, char *buf, int buflen);
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int msgbuf_getchar(struct msgbuf *mbp);
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int msgbuf_getcount(struct msgbuf *mbp);
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void msgbuf_init(struct msgbuf *mbp, void *ptr, int size);
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int msgbuf_peekbytes(struct msgbuf *mbp, char *buf, int buflen,
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u_int *seqp);
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void msgbuf_reinit(struct msgbuf *mbp, void *ptr, int size);
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#ifndef MSGBUF_SIZE
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#define MSGBUF_SIZE (32768 * 3)
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#endif
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#endif /* KERNEL */
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#endif /* !_SYS_MSGBUF_H_ */
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