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 */