ab063af911
Remove evil allocation macros from machdep.c (why was that there???) and use malloc() instead. Move paramters out of param.h and into the code itself. Move a bunch of internal definitions from public sys/*.h headers (without #ifdef _KERNEL even) into the code itself. I had hoped to make some of this more dynamic, but the cost of doing wakeups on all sleeping processes on old arrays was too frightening. The other possibility is to initialize on the first use, and allow dynamic sysctl changes to parameters right until that point. That would allow /etc/rc.sysctl to change SEM* and MSG* defaults as we presently do with SHM*, but without the nightmare of changing a running system.
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: msg.h,v 1.4 1994/06/29 06:44:43 cgd Exp $ */
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/*
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* SVID compatible msg.h file
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*
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* Author: Daniel Boulet
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*
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* Copyright 1993 Daniel Boulet and RTMX Inc.
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*
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* This system call was implemented by Daniel Boulet under contract from RTMX.
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*/
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#ifndef _SYS_MSG_H_
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#define _SYS_MSG_H_
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#include <sys/ipc.h>
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/*
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* The MSG_NOERROR identifier value, the msqid_ds struct and the msg struct
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* are as defined by the SV API Intel 386 Processor Supplement.
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*/
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#define MSG_NOERROR 010000 /* don't complain about too long msgs */
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struct msg;
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struct msqid_ds {
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struct ipc_perm msg_perm; /* msg queue permission bits */
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struct msg *msg_first; /* first message in the queue */
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struct msg *msg_last; /* last message in the queue */
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u_long msg_cbytes; /* number of bytes in use on the queue */
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u_long msg_qnum; /* number of msgs in the queue */
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u_long msg_qbytes; /* max # of bytes on the queue */
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pid_t msg_lspid; /* pid of last msgsnd() */
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pid_t msg_lrpid; /* pid of last msgrcv() */
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time_t msg_stime; /* time of last msgsnd() */
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long msg_pad1;
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time_t msg_rtime; /* time of last msgrcv() */
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long msg_pad2;
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time_t msg_ctime; /* time of last msgctl() */
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long msg_pad3;
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long msg_pad4[4];
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};
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/*
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* Structure describing a message. The SVID doesn't suggest any
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* particular name for this structure. There is a reference in the
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* msgop man page that reads "The structure mymsg is an example of what
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* this user defined buffer might look like, and includes the following
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* members:". This sentence is followed by two lines equivalent
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* to the mtype and mtext field declarations below. It isn't clear
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* if "mymsg" refers to the naem of the structure type or the name of an
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* instance of the structure...
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*/
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struct mymsg {
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long mtype; /* message type (+ve integer) */
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char mtext[1]; /* message body */
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};
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#ifdef _KERNEL
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/*
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* Based on the configuration parameters described in an SVR2 (yes, two)
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* config(1m) man page.
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*
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* Each message is broken up and stored in segments that are msgssz bytes
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* long. For efficiency reasons, this should be a power of two. Also,
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* it doesn't make sense if it is less than 8 or greater than about 256.
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* Consequently, msginit in kern/sysv_msg.c checks that msgssz is a power of
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* two between 8 and 1024 inclusive (and panic's if it isn't).
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*/
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struct msginfo {
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int msgmax, /* max chars in a message */
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msgmni, /* max message queue identifiers */
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msgmnb, /* max chars in a queue */
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msgtql, /* max messages in system */
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msgssz, /* size of a message segment (see notes above) */
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msgseg; /* number of message segments */
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};
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extern struct msginfo msginfo;
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#endif
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int msgsys __P((int, ...));
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int msgctl __P((int, int, struct msqid_ds *));
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int msgget __P((key_t, int));
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int msgsnd __P((int, void *, size_t, int));
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int msgrcv __P((int, void*, size_t, long, int));
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__END_DECLS
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#endif
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#endif /* !_SYS_MSG_H_ */
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