xref: /titanic_44/usr/src/uts/common/sys/msg.h (revision e1c679fa4b0ab8c4bcaa6263974ca0c46e5b027f)
1  /*
2   * CDDL HEADER START
3   *
4   * The contents of this file are subject to the terms of the
5   * Common Development and Distribution License, Version 1.0 only
6   * (the "License").  You may not use this file except in compliance
7   * with the License.
8   *
9   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10   * or http://www.opensolaris.org/os/licensing.
11   * See the License for the specific language governing permissions
12   * and limitations under the License.
13   *
14   * When distributing Covered Code, include this CDDL HEADER in each
15   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16   * If applicable, add the following below this CDDL HEADER, with the
17   * fields enclosed by brackets "[]" replaced with your own identifying
18   * information: Portions Copyright [yyyy] [name of copyright owner]
19   *
20   * CDDL HEADER END
21   */
22  /*
23   * Copyright 1999-2003 Sun Microsystems, Inc.  All rights reserved.
24   * Use is subject to license terms.
25   */
26  
27  /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28  /*	  All Rights Reserved  	*/
29  
30  
31  #ifndef _SYS_MSG_H
32  #define	_SYS_MSG_H
33  
34  #pragma ident	"%Z%%M%	%I%	%E% SMI"
35  
36  #include <sys/ipc.h>
37  
38  #ifdef	__cplusplus
39  extern "C" {
40  #endif
41  
42  /*
43   * IPC Message Facility.
44   */
45  
46  /*
47   * Implementation Constants.
48   */
49  
50  /*
51   * Permission Definitions.
52   */
53  #define	MSG_R	0400	/* read permission */
54  #define	MSG_W	0200	/* write permission */
55  
56  /*
57   * ipc_perm Mode Definitions.
58   */
59  #define	MSG_RWAIT	01000	/* a reader is waiting for a message */
60  #define	MSG_WWAIT	02000	/* a writer is waiting to send */
61  
62  /*
63   * Message Operation Flags.
64   */
65  #define	MSG_NOERROR	010000	/* no error if big message */
66  
67  typedef unsigned long msgqnum_t;
68  typedef unsigned long msglen_t;
69  
70  struct msg;
71  struct msqid_ds {
72  	struct ipc_perm	msg_perm;	/* operation permission struct */
73  	struct msg	*msg_first;	/* ptr to first message on q */
74  	struct msg	*msg_last;	/* ptr to last message on q */
75  	msglen_t	msg_cbytes;	/* current # bytes on q */
76  	msgqnum_t	msg_qnum;	/* # of messages on q */
77  	msglen_t	msg_qbytes;	/* max # of bytes on q */
78  	pid_t		msg_lspid;	/* pid of last msgsnd */
79  	pid_t		msg_lrpid;	/* pid of last msgrcv */
80  #if defined(_LP64)
81  	time_t		msg_stime;	/* last msgsnd time */
82  	time_t		msg_rtime;	/* last msgrcv time */
83  	time_t		msg_ctime;	/* last change time */
84  #else
85  	time_t		msg_stime;	/* last msgsnd time */
86  	int32_t		msg_pad1;	/* reserved for time_t expansion */
87  	time_t		msg_rtime;	/* last msgrcv time */
88  	int32_t		msg_pad2;	/* time_t expansion */
89  	time_t		msg_ctime;	/* last change time */
90  	int32_t		msg_pad3;	/* time_t expansion */
91  #endif
92  	short		msg_cv;
93  	short		msg_qnum_cv;
94  	long		msg_pad4[3];	/* reserve area */
95  };
96  
97  /*
98   * User message buffer template for msgsnd and msgrecv system calls.
99   */
100  
101  #ifdef _KERNEL
102  struct ipcmsgbuf {
103  #else
104  struct msgbuf {
105  #endif /* _KERNEL */
106  #if defined(_XOPEN_SOURCE)
107  	long	_mtype;		/* message type */
108  	char	_mtext[1];	/* message text */
109  #else
110  	long	mtype;		/* message type */
111  	char	mtext[1];	/* message text */
112  #endif
113  };
114  
115  /*
116   * Header and message header structures for msgsnap() system call.
117   */
118  struct msgsnap_head {
119  	size_t	msgsnap_size;	/* bytes consumed/required in the buffer */
120  	size_t	msgsnap_nmsg;	/* number of messages in the buffer */
121  };
122  
123  struct msgsnap_mhead {
124  	size_t	msgsnap_mlen;	/* number of bytes in message that follows */
125  	long	msgsnap_mtype;	/* message type */
126  };
127  
128  #if !defined(_KERNEL)
129  #if defined(__STDC__)
130  int msgctl(int, int, struct msqid_ds *);
131  int msgget(key_t, int);
132  int msgids(int *, uint_t, uint_t *);
133  int msgsnap(int, void *, size_t, long);
134  ssize_t msgrcv(int, void *, size_t, long, int);
135  int msgsnd(int, const void *, size_t, int);
136  #else /* __STDC__ */
137  int msgctl();
138  int msgget();
139  int msgids();
140  int msgsnap();
141  int msgrcv();
142  int msgsnd();
143  #endif /* __STDC__ */
144  #endif /* ! _KERNEL */
145  
146  #ifdef	__cplusplus
147  }
148  #endif
149  
150  #endif	/* _SYS_MSG_H */
151