sys/sys/mqueue.h

   1 #ifndef _MQUEUE_H_
   2 #define _MQUEUE_H_
   3
   4 /* mqueue.h: POSIX 1003.1b Message Queues */
   5
   6 /*-
   7  * Copyright (c) 1996, 1997
   8  *      HD Associates, Inc.  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by HD Associates, Inc
  21  * 4. Neither the name of the author nor the names of any co-contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  * $FreeBSD: src/sys/posix4/mqueue.h,v 1.4 1999/12/29 04:55:02 peter Exp $
  38  * $DragonFly: src/sys/sys/mqueue.h,v 1.3 2003/08/27 06:30:04 rob Exp $
  39  */
  40
  41 #include <sys/_posix.h>
  42
  43 #ifdef _P1003_1B_INCLUDE_MAYBES
  44 #include <sys/types.h>
  45 #include <fcntl.h>
  46 #include <time.h>
  47 #include <signal.h>
  48 #else
  49 struct sigevent;
  50 #endif
  51
  52 typedef int mqd_t;              /* message queue descriptors */
  53
  54 struct mq_attr {
  55         long mq_flags;          /* message queue flags */
  56         long mq_maxmsg;         /* maximum number of messages */
  57         long mq_msgsize;        /* maximum message size */
  58         long mq_curmsgs;        /* number of messages currently queued */
  59 };
  60
  61 #ifndef _KERNEL
  62
  63 #include <sys/cdefs.h>
  64
  65 __BEGIN_DECLS
  66 mqd_t mq_open (const char *, int oflag, ...);
  67 int mq_close (mqd_t);
  68 int mq_unlink (const char *);
  69 int mq_send (mqd_t, const char *, size_t, unsigned int);
  70 ssize_t mq_receive (mqd_t, char *, size_t, unsigned int *);
  71 int mq_notify (mqd_t, const struct sigevent *);
  72 int mq_setattr (mqd_t, const struct mq_attr *, struct mq_attr *);
  73 int mq_getattr (mqd_t, struct mq_attr *);
  74 __END_DECLS
  75
  76 #endif
  77
  78 #endif /* _MQUEUE_H_ */