The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/posix4/mqueue.h

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    1 /*-
    2  * Copyright (c) 1996, 1997
    3  *      HD Associates, Inc.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by HD Associates, Inc
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/5.4/sys/posix4/mqueue.h 103704 2002-09-20 17:54:34Z mike $
   33  */
   34 
   35 /* mqueue.h: POSIX 1003.1b Message Queues */
   36 
   37 #ifndef _MQUEUE_H_
   38 #define _MQUEUE_H_
   39 
   40 #include <sys/_posix.h>
   41 
   42 #ifdef _P1003_1B_INCLUDE_MAYBES
   43 #include <sys/types.h>
   44 #include <fcntl.h>
   45 #include <time.h>
   46 #include <signal.h>
   47 #else
   48 struct sigevent;
   49 #endif
   50 
   51 typedef int             mqd_t;  /* message queue descriptors */
   52 
   53 struct mq_attr {
   54         long    mq_flags;       /* message queue flags */
   55         long    mq_maxmsg;      /* maximum number of messages */
   56         long    mq_msgsize;     /* maximum message size */
   57         long    mq_curmsgs;     /* number of messages currently queued */
   58 };
   59 
   60 #ifndef _KERNEL
   61 
   62 #include <sys/cdefs.h>
   63 
   64 __BEGIN_DECLS
   65 int      mq_close(mqd_t);
   66 int      mq_getattr(mqd_t, struct mq_attr *);
   67 int      mq_notify(mqd_t, const struct sigevent *);
   68 mqd_t    mq_open(const char *, int oflag, ...);
   69 ssize_t  mq_receive(mqd_t, char *, size_t, unsigned int *);
   70 int      mq_send(mqd_t, const char *, size_t, unsigned int);
   71 int      mq_setattr(mqd_t, const struct mq_attr *, struct mq_attr *);
   72 int      mq_unlink(const char *);
   73 __END_DECLS
   74 
   75 #endif
   76 
   77 #endif /* !_MQUEUE_H_ */

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