bits/mqueue.h

   1 /* Copyright (C) 2004-2023 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 };