/* Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _SYS_MSG_H #define _SYS_MSG_H #include /* Get common definition of System V style IPC. */ #include /* Get system dependent definition of `struct msqid_ds' and more. */ #include /* Define types required by the standard. */ #define __need_time_t #include #ifndef pid_t typedef __pid_t pid_t; # define pid_t pid_t #endif #ifndef ssize_t typedef __ssize_t ssize_t; # define ssize_t ssize_t #endif /* The following System V style IPC functions implement a message queue system. The definition is found in XPG2. */ /* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */ struct msgbuf { #ifdef __USE_GNU long int mtype; /* type of received/sent message */ char mtext[1]; /* text of the message */ #else long int __mtype; /* type of received/sent message */ char __mtext[1]; /* text of the message */ #endif }; __BEGIN_DECLS /* Message queue control operation. */ extern int msgctl __P ((int __msqid, int __cmd, struct msqid_ds *__buf)); /* Get messages queue. */ extern int msgget __P ((key_t __key, int __msgflg)); /* Receive message from message queue. */ extern int msgrcv __P ((int __msqid, void *__msgp, size_t __msgsz, long int __msgtyp, int __msgflg)); /* Send message to message queue. */ extern int msgsnd __P ((int __msqid, __const void *__msgp, size_t __msgsz, int __msgflg)); __END_DECLS #endif /* sys/msg.h */