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84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/* Copyright (C) 1995-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_MSG_H
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# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
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#endif
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#include <bits/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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#ifdef __USE_GNU
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# define MSG_EXCEPT 020000 /* recv any msg except of specified type */
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# define MSG_COPY 040000 /* copy (not remove) all queue messages */
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#endif
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/* Types used in the structure definition. */
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typedef unsigned long int msgqnum_t;
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typedef unsigned long int msglen_t;
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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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#if __WORDSIZE == 32
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unsigned int __glibc_reserved1;
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#endif
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__time_t msg_stime; /* time of last msgsnd command */
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#if __WORDSIZE == 32
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unsigned int __glibc_reserved2;
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#endif
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__time_t msg_rtime; /* time of last msgrcv command */
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#if __WORDSIZE == 32
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unsigned int __glibc_reserved3;
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#endif
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__time_t msg_ctime; /* time of last change */
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unsigned long __msg_cbytes; /* current number of bytes on queue */
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msgqnum_t msg_qnum; /* number of messages currently on queue */
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msglen_t 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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unsigned long __glibc_reserved4;
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unsigned long __glibc_reserved5;
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};
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#ifdef __USE_MISC
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# define msg_cbytes __msg_cbytes
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/* ipcs ctl commands */
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# define MSG_STAT 11
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# define MSG_INFO 12
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/* buffer for msgctl calls IPC_INFO, MSG_INFO */
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struct msginfo
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{
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int msgpool;
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int msgmap;
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int msgmax;
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int msgmnb;
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int msgmni;
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int msgssz;
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int msgtql;
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unsigned short int msgseg;
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};
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#endif /* __USE_MISC */
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