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a784e502 | 1 | /* Copyright (C) 1995-1997,1999,2000,2003,2006,2007,2012 |
50e16f85 | 2 | Free Software Foundation, Inc. |
7e3be507 | 3 | This file is part of the GNU C Library. |
60478656 | 4 | |
7e3be507 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
60478656 | 9 | |
7e3be507 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
60478656 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
60478656 RM |
18 | |
19 | #ifndef _SYS_MSG_H | |
20 | #define _SYS_MSG_H | |
21 | ||
22 | #include <features.h> | |
60478656 | 23 | |
50e16f85 UD |
24 | #define __need_size_t |
25 | #include <stddef.h> | |
26 | ||
60478656 RM |
27 | /* Get common definition of System V style IPC. */ |
28 | #include <sys/ipc.h> | |
29 | ||
30 | /* Get system dependent definition of `struct msqid_ds' and more. */ | |
5107cf1d | 31 | #include <bits/msq.h> |
60478656 | 32 | |
bba09d23 UD |
33 | /* Define types required by the standard. */ |
34 | #define __need_time_t | |
35 | #include <time.h> | |
36 | ||
37 | #ifndef __pid_t_defined | |
38 | typedef __pid_t pid_t; | |
39 | # define __pid_t_defined | |
40 | #endif | |
41 | ||
42 | #ifndef __ssize_t_defined | |
43 | typedef __ssize_t ssize_t; | |
44 | # define __ssize_t_defined | |
45 | #endif | |
46 | ||
60478656 RM |
47 | /* The following System V style IPC functions implement a message queue |
48 | system. The definition is found in XPG2. */ | |
49 | ||
bba09d23 | 50 | #ifdef __USE_GNU |
60478656 RM |
51 | /* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */ |
52 | struct msgbuf | |
f4017d20 UD |
53 | { |
54 | long int mtype; /* type of received/sent message */ | |
55 | char mtext[1]; /* text of the message */ | |
56 | }; | |
bba09d23 | 57 | #endif |
60478656 RM |
58 | |
59 | ||
f4017d20 UD |
60 | __BEGIN_DECLS |
61 | ||
60478656 | 62 | /* Message queue control operation. */ |
c1422e5b | 63 | extern int msgctl (int __msqid, int __cmd, struct msqid_ds *__buf) __THROW; |
60478656 RM |
64 | |
65 | /* Get messages queue. */ | |
c1422e5b | 66 | extern int msgget (key_t __key, int __msgflg) __THROW; |
60478656 | 67 | |
2c008571 UD |
68 | /* Receive message from message queue. |
69 | ||
70 | This function is a cancellation point and therefore not marked with | |
71 | __THROW. */ | |
a5852807 UD |
72 | extern ssize_t msgrcv (int __msqid, void *__msgp, size_t __msgsz, |
73 | long int __msgtyp, int __msgflg); | |
2c008571 UD |
74 | |
75 | /* Send message to message queue. | |
60478656 | 76 | |
2c008571 UD |
77 | This function is a cancellation point and therefore not marked with |
78 | __THROW. */ | |
a784e502 | 79 | extern int msgsnd (int __msqid, const void *__msgp, size_t __msgsz, |
2c008571 | 80 | int __msgflg); |
60478656 RM |
81 | |
82 | __END_DECLS | |
83 | ||
84 | #endif /* sys/msg.h */ |