]>
Commit | Line | Data |
---|---|---|
d614a753 | 1 | /* Copyright (C) 1995-2020 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 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://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 | 32 | /* Define types required by the standard. */ |
05b68e14 | 33 | #include <bits/types/time_t.h> |
bba09d23 UD |
34 | |
35 | #ifndef __pid_t_defined | |
36 | typedef __pid_t pid_t; | |
37 | # define __pid_t_defined | |
38 | #endif | |
39 | ||
40 | #ifndef __ssize_t_defined | |
41 | typedef __ssize_t ssize_t; | |
42 | # define __ssize_t_defined | |
43 | #endif | |
44 | ||
60478656 RM |
45 | /* The following System V style IPC functions implement a message queue |
46 | system. The definition is found in XPG2. */ | |
47 | ||
bba09d23 | 48 | #ifdef __USE_GNU |
60478656 RM |
49 | /* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */ |
50 | struct msgbuf | |
f4017d20 | 51 | { |
180be88b | 52 | __syscall_slong_t mtype; /* type of received/sent message */ |
f4017d20 UD |
53 | char mtext[1]; /* text of the message */ |
54 | }; | |
bba09d23 | 55 | #endif |
60478656 RM |
56 | |
57 | ||
f4017d20 UD |
58 | __BEGIN_DECLS |
59 | ||
60478656 | 60 | /* Message queue control operation. */ |
c1422e5b | 61 | extern int msgctl (int __msqid, int __cmd, struct msqid_ds *__buf) __THROW; |
60478656 RM |
62 | |
63 | /* Get messages queue. */ | |
c1422e5b | 64 | extern int msgget (key_t __key, int __msgflg) __THROW; |
60478656 | 65 | |
2c008571 UD |
66 | /* Receive message from message queue. |
67 | ||
68 | This function is a cancellation point and therefore not marked with | |
69 | __THROW. */ | |
a5852807 UD |
70 | extern ssize_t msgrcv (int __msqid, void *__msgp, size_t __msgsz, |
71 | long int __msgtyp, int __msgflg); | |
2c008571 UD |
72 | |
73 | /* Send message to message queue. | |
60478656 | 74 | |
2c008571 UD |
75 | This function is a cancellation point and therefore not marked with |
76 | __THROW. */ | |
a784e502 | 77 | extern int msgsnd (int __msqid, const void *__msgp, size_t __msgsz, |
2c008571 | 78 | int __msgflg); |
60478656 RM |
79 | |
80 | __END_DECLS | |
81 | ||
82 | #endif /* sys/msg.h */ |