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55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
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/* 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_MSQ_BUF_H
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#define _SYS_MSQ_BUF_H
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#include <features.h>
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#include <sys/types.h>
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/* Define options for message queue functions. */
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#define MSG_NOERROR 010000 /* no error if message is too big */
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#define MSG_EXCEPT 020000 /* recv any msg except of specified type */
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__BEGIN_DECLS
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/* Structure of record for one message inside the kernel.
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The type `struct __msg' is opaque. */
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struct msqid_ds
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{
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struct ipc_perm msg_perm; /* structure describing operation permission */
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struct msg *__msg_first; /* pointer to first message on queue */
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struct msg *__msg_last; /* pointer to last message on queue */
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__time_t msg_stime; /* time of last msgsnd command */
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__time_t msg_rtime; /* time of last msgrcv command */
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__time_t msg_ctime; /* time of last change */
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struct wait_queue *__wwait; /* ??? */
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struct wait_queue *__rwait; /* ??? */
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unsigned short int __msg_cbytes;/* current number of bytes on queue */
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unsigned short int msg_qnum; /* number of messages currently on queue */
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unsigned short int msg_qbytes;/* max number of bytes allowed on queue */
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__pid_t msg_lspid; /* pid of last msgsnd() */
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__pid_t msg_lrpid; /* pid of last msgrcv() */
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};
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__END_DECLS
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#endif /* sys/msq_buf.h */
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