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b168057a | 1 | /* Copyright (C) 1995-2015 Free Software Foundation, Inc. |
7e3be507 | 2 | This file is part of the GNU C Library. |
60478656 | 3 | |
7e3be507 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
60478656 | 8 | |
7e3be507 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
60478656 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
60478656 RM |
17 | |
18 | #ifndef _SYS_MSG_H | |
19 | #define _SYS_MSG_H | |
20 | ||
21 | #include <features.h> | |
60478656 | 22 | |
50e16f85 UD |
23 | #define __need_size_t |
24 | #include <stddef.h> | |
25 | ||
60478656 RM |
26 | /* Get common definition of System V style IPC. */ |
27 | #include <sys/ipc.h> | |
28 | ||
29 | /* Get system dependent definition of `struct msqid_ds' and more. */ | |
5107cf1d | 30 | #include <bits/msq.h> |
60478656 | 31 | |
bba09d23 UD |
32 | /* Define types required by the standard. */ |
33 | #define __need_time_t | |
34 | #include <time.h> | |
35 | ||
36 | #ifndef __pid_t_defined | |
37 | typedef __pid_t pid_t; | |
38 | # define __pid_t_defined | |
39 | #endif | |
40 | ||
41 | #ifndef __ssize_t_defined | |
42 | typedef __ssize_t ssize_t; | |
43 | # define __ssize_t_defined | |
44 | #endif | |
45 | ||
60478656 RM |
46 | /* The following System V style IPC functions implement a message queue |
47 | system. The definition is found in XPG2. */ | |
48 | ||
bba09d23 | 49 | #ifdef __USE_GNU |
60478656 RM |
50 | /* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */ |
51 | struct msgbuf | |
f4017d20 | 52 | { |
180be88b | 53 | __syscall_slong_t mtype; /* type of received/sent message */ |
f4017d20 UD |
54 | char mtext[1]; /* text of the message */ |
55 | }; | |
bba09d23 | 56 | #endif |
60478656 RM |
57 | |
58 | ||
f4017d20 UD |
59 | __BEGIN_DECLS |
60 | ||
60478656 | 61 | /* Message queue control operation. */ |
c1422e5b | 62 | extern int msgctl (int __msqid, int __cmd, struct msqid_ds *__buf) __THROW; |
60478656 RM |
63 | |
64 | /* Get messages queue. */ | |
c1422e5b | 65 | extern int msgget (key_t __key, int __msgflg) __THROW; |
60478656 | 66 | |
2c008571 UD |
67 | /* Receive message from message queue. |
68 | ||
69 | This function is a cancellation point and therefore not marked with | |
70 | __THROW. */ | |
a5852807 UD |
71 | extern ssize_t msgrcv (int __msqid, void *__msgp, size_t __msgsz, |
72 | long int __msgtyp, int __msgflg); | |
2c008571 UD |
73 | |
74 | /* Send message to message queue. | |
60478656 | 75 | |
2c008571 UD |
76 | This function is a cancellation point and therefore not marked with |
77 | __THROW. */ | |
a784e502 | 78 | extern int msgsnd (int __msqid, const void *__msgp, size_t __msgsz, |
2c008571 | 79 | int __msgflg); |
60478656 RM |
80 | |
81 | __END_DECLS | |
82 | ||
83 | #endif /* sys/msg.h */ |