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01: /* Copyright (C) 1995-1997,1999,2000,2003,2006,2007
02:    Free Software Foundation, Inc.
03:    This file is part of the GNU C Library.
04: 
05:    The GNU C Library is free software; you can redistribute it and/or
06:    modify it under the terms of the GNU Lesser General Public
07:    License as published by the Free Software Foundation; either
08:    version 2.1 of the License, or (at your option) any later version.
09: 
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
13:    Lesser General Public License for more details.
14: 
15:    You should have received a copy of the GNU Lesser General Public
16:    License along with the GNU C Library; if not, write to the Free
17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18:    02111-1307 USA.  */
19: 
20: #ifndef _SYS_MSG_H
21: #define _SYS_MSG_H
22: 
23: #include <features.h>
24: 
25: #define __need_size_t
26: #include <stddef.h>
27: 
28: /* Get common definition of System V style IPC.  */
29: #include <sys/ipc.h>
30: 
31: /* Get system dependent definition of `struct msqid_ds' and more.  */
32: #include <bits/msq.h>
33: 
34: /* Define types required by the standard.  */
35: #define __need_time_t
36: #include <time.h>
37: 
38: #ifndef __pid_t_defined
39: typedef __pid_t pid_t;
40: # define __pid_t_defined
41: #endif
42: 
43: #ifndef __ssize_t_defined
44: typedef __ssize_t ssize_t;
45: # define __ssize_t_defined
46: #endif
47: 
48: /* The following System V style IPC functions implement a message queue
49:    system.  The definition is found in XPG2.  */
50: 
51: #ifdef __USE_GNU
52: /* Template for struct to be used as argument for `msgsnd' and `msgrcv'.  */
53: struct msgbuf
54:   {
55:     long int mtype;             /* type of received/sent message */
56:     char mtext[1];              /* text of the message */
57:   };
58: #endif
59: 
60: 
61: __BEGIN_DECLS
62: 
63: /* Message queue control operation.  */
64: extern int msgctl (int __msqid, int __cmd, struct msqid_ds *__buf) __THROW;
65: 
66: /* Get messages queue.  */
67: extern int msgget (key_t __key, int __msgflg) __THROW;
68: 
69: /* Receive message from message queue.
70: 
71:    This function is a cancellation point and therefore not marked with
72:    __THROW.  */
73: extern ssize_t msgrcv (int __msqid, void *__msgp, size_t __msgsz,
74:                        long int __msgtyp, int __msgflg);
75: 
76: /* Send message to message queue.
77: 
78:    This function is a cancellation point and therefore not marked with
79:    __THROW.  */
80: extern int msgsnd (int __msqid, __const void *__msgp, size_t __msgsz,
81:                    int __msgflg);
82: 
83: __END_DECLS
84: 
85: #endif /* sys/msg.h */
86: 

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