1 /* Copyright (C) 2004-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _MQUEUE_H 19 # error "Never use <bits/mqueue.h> directly; include <mqueue.h> instead." 20 #endif 21 22 typedef int mqd_t; 23 24 struct mq_attr 25 { 26 long int mq_flags; /* Message queue flags. */ 27 long int mq_maxmsg; /* Maximum number of messages. */ 28 long int mq_msgsize; /* Maximum message size. */ 29 long int mq_curmsgs; /* Number of messages currently queued. */ 30 }; 31