| 1 | /* Copyright (C) 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, write to the Free |
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| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 17 | 02111-1307 USA. */ |
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| 18 | |
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| 19 | #ifndef _SYS_MSG_H |
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| 20 | #define _SYS_MSG_H |
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| 21 | |
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| 22 | #include <features.h> |
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| 23 | |
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| 24 | /* Get common definition of System V style IPC. */ |
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| 25 | #include <sys/ipc.h> |
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| 26 | |
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| 27 | /* Get system dependent definition of `struct msqid_ds' and more. */ |
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| 28 | #include <bits/msq.h> |
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| 29 | |
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| 30 | /* Define types required by the standard. */ |
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| 31 | #define __need_time_t |
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| 32 | #include <time.h> |
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| 33 | |
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| 34 | #ifndef __pid_t_defined |
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| 35 | typedef __pid_t pid_t; |
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| 36 | # define __pid_t_defined |
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| 37 | #endif |
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| 38 | |
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| 39 | #ifndef __ssize_t_defined |
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| 40 | typedef __ssize_t ssize_t; |
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| 41 | # define __ssize_t_defined |
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| 42 | #endif |
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| 43 | |
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| 44 | /* The following System V style IPC functions implement a message queue |
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| 45 | system. The definition is found in XPG2. */ |
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| 46 | |
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| 47 | #ifdef __USE_GNU |
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| 48 | /* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */ |
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| 49 | struct msgbuf |
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| 50 | { |
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| 51 | long int mtype; /* type of received/sent message */ |
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| 52 | char mtext[1]; /* text of the message */ |
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| 53 | }; |
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| 54 | #endif |
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| 55 | |
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| 56 | |
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| 57 | __BEGIN_DECLS |
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| 58 | |
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| 59 | /* Message queue control operation. */ |
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| 60 | extern int msgctl (int __msqid, int __cmd, struct msqid_ds *__buf) __THROW; |
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| 61 | |
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| 62 | /* Get messages queue. */ |
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| 63 | extern int msgget (key_t __key, int __msgflg) __THROW; |
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| 64 | |
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| 65 | /* Receive message from message queue. */ |
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| 66 | extern int msgrcv (int __msqid, void *__msgp, size_t __msgsz, |
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| 67 | long int __msgtyp, int __msgflg) __THROW; |
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| 68 | |
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| 69 | /* Send message to message queue. */ |
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| 70 | extern int msgsnd (int __msqid, __const void *__msgp, size_t __msgsz, |
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| 71 | int __msgflg) __THROW; |
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| 72 | |
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| 73 | __END_DECLS |
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| 74 | |
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| 75 | #endif /* sys/msg.h */ |
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