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glibc/bits/msq.h
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/* Copyright (C) 1995-2016 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 Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#ifndef _SYS_MSG_H | |
#error "Never use <bits/msq.h> directly; include <sys/msg.h> instead." | |
#endif | |
#include <bits/types.h> | |
/* Define options for message queue functions. */ | |
#define MSG_NOERROR 010000 /* no error if message is too big */ | |
/* Types used in the structure definition. */ | |
typedef unsigned short int msgqnum_t; | |
typedef unsigned short int msglen_t; | |
/* Structure of record for one message inside the kernel. | |
The type `struct __msg' is opaque. */ | |
struct msqid_ds | |
{ | |
struct ipc_perm msg_perm; /* structure describing operation permission */ | |
__time_t msg_stime; /* time of last msgsnd command */ | |
__time_t msg_rtime; /* time of last msgrcv command */ | |
__time_t msg_ctime; /* time of last change */ | |
msgqnum_t msg_qnum; /* number of messages currently on queue */ | |
msglen_t msg_qbytes; /* max number of bytes allowed on queue */ | |
__pid_t msg_lspid; /* pid of last msgsnd() */ | |
__pid_t msg_lrpid; /* pid of last msgrcv() */ | |
}; |