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