add directory Ref-docs
This commit is contained in:
gohigh
146
Ref-docs/POSIX/susv3/basedefs/mqueue.h.html
Normal file
146
Ref-docs/POSIX/susv3/basedefs/mqueue.h.html
Normal file
@@ -0,0 +1,146 @@
|
||||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
|
||||
<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
|
||||
<title><mqueue.h></title>
|
||||
</head>
|
||||
<body bgcolor="white">
|
||||
<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
|
||||
</script>
|
||||
|
||||
<basefont size="3"> <a name="<mqueue.h>"></a> <a name="tag_13_28"></a><!-- <mqueue.h> -->
|
||||
<!--header start-->
|
||||
<center><font size="2">The Open Group Base Specifications Issue 6<br>
|
||||
IEEE Std 1003.1-2001<br>
|
||||
Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
|
||||
|
||||
<!--header end-->
|
||||
<hr size="2" noshade>
|
||||
<h4><a name="tag_13_28_01"></a>NAME</h4>
|
||||
|
||||
<blockquote>mqueue.h - message queues (<b>REALTIME</b>)</blockquote>
|
||||
|
||||
<h4><a name="tag_13_28_02"></a>SYNOPSIS</h4>
|
||||
|
||||
<blockquote class="synopsis">
|
||||
<div class="box"><tt><sup>[<a href="javascript:open_code('MSG')">MSG</a>]</sup> <img src="../images/opt-start.gif" alt=
|
||||
"[Option Start]" border="0"> #include <mqueue.h> <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></div>
|
||||
</blockquote>
|
||||
|
||||
<h4><a name="tag_13_28_03"></a>DESCRIPTION</h4>
|
||||
|
||||
<blockquote>
|
||||
<p>The <i><mqueue.h></i> header shall define the <b>mqd_t</b> type, which is used for message queue descriptors. This is not
|
||||
an array type.</p>
|
||||
|
||||
<p>The <i><mqueue.h></i> header shall define the <b>sigevent</b> structure (as described in <a href=
|
||||
"signal.h.html"><i><signal.h></i></a> ) and the <b>mq_attr</b> structure, which is used in getting and setting the attributes
|
||||
of a message queue. Attributes are initially set when the message queue is created. An <b>mq_attr</b> structure shall have at least
|
||||
the following fields:</p>
|
||||
|
||||
<pre>
|
||||
<tt>long mq_flags </tt> Message queue flags. <tt>
|
||||
long mq_maxmsg </tt> Maximum number of messages. <tt>
|
||||
long mq_msgsize </tt> Maximum message size. <tt>
|
||||
long mq_curmsgs </tt> Number of messages currently queued. <tt>
|
||||
</tt>
|
||||
</pre>
|
||||
|
||||
<p>The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.</p>
|
||||
|
||||
<pre>
|
||||
<tt>int mq_close(mqd_t);
|
||||
int mq_getattr(mqd_t, struct mq_attr *);
|
||||
int mq_notify(mqd_t, const struct sigevent *);
|
||||
mqd_t mq_open(const char *, int, ...);
|
||||
ssize_t mq_receive(mqd_t, char *, size_t, unsigned *);
|
||||
int mq_send(mqd_t, const char *, size_t, unsigned );
|
||||
int mq_setattr(mqd_t, const struct mq_attr *restrict,
|
||||
struct mq_attr *restrict);
|
||||
<sup>[<a href="javascript:open_code('TMO')">TMO</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
|
||||
ssize_t mq_timedreceive(mqd_t, char *restrict, size_t,
|
||||
unsigned *restrict, const struct timespec *restrict);
|
||||
int mq_timedsend(mqd_t, const char *, size_t, unsigned ,
|
||||
const struct timespec *);
|
||||
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
|
||||
int mq_unlink(const char *);
|
||||
</tt>
|
||||
</pre>
|
||||
|
||||
<p>Inclusion of the <i><mqueue.h></i> header may make visible symbols defined in the headers <a href=
|
||||
"../basedefs/fcntl.h.html"><i><fcntl.h></i></a>, <a href="../basedefs/signal.h.html"><i><signal.h></i></a>, <a href=
|
||||
"../basedefs/sys/types.h.html"><i><sys/types.h></i></a>, and <a href="../basedefs/time.h.html"><i><time.h></i></a>.</p>
|
||||
</blockquote>
|
||||
|
||||
<hr>
|
||||
<div class="box"><em>The following sections are informative.</em></div>
|
||||
|
||||
<h4><a name="tag_13_28_04"></a>APPLICATION USAGE</h4>
|
||||
|
||||
<blockquote>
|
||||
<p>None.</p>
|
||||
</blockquote>
|
||||
|
||||
<h4><a name="tag_13_28_05"></a>RATIONALE</h4>
|
||||
|
||||
<blockquote>
|
||||
<p>None.</p>
|
||||
</blockquote>
|
||||
|
||||
<h4><a name="tag_13_28_06"></a>FUTURE DIRECTIONS</h4>
|
||||
|
||||
<blockquote>
|
||||
<p>None.</p>
|
||||
</blockquote>
|
||||
|
||||
<h4><a name="tag_13_28_07"></a>SEE ALSO</h4>
|
||||
|
||||
<blockquote>
|
||||
<p><a href="fcntl.h.html"><i><fcntl.h></i></a> , <a href="signal.h.html"><i><signal.h></i></a> , <a href=
|
||||
"sys/types.h.html"><i><sys/types.h></i></a> , <a href="time.h.html"><i><time.h></i></a> , the System Interfaces volume
|
||||
of IEEE Std 1003.1-2001, <a href="../functions/mq_close.html"><i>mq_close</i>()</a>, <a href=
|
||||
"../functions/mq_getattr.html"><i>mq_getattr</i>()</a>, <a href="../functions/mq_notify.html"><i>mq_notify</i>()</a>, <a href=
|
||||
"../functions/mq_open.html"><i>mq_open</i>()</a>, <a href="../functions/mq_receive.html"><i>mq_receive</i>()</a>, <a href=
|
||||
"../functions/mq_send.html"><i>mq_send</i>()</a>, <a href="../functions/mq_setattr.html"><i>mq_setattr</i>()</a>, <a href=
|
||||
"../functions/mq_timedreceive.html"><i>mq_timedreceive</i>()</a>, <a href=
|
||||
"../functions/mq_timedsend.html"><i>mq_timedsend</i>()</a>, <a href="../functions/mq_unlink.html"><i>mq_unlink</i>()</a></p>
|
||||
</blockquote>
|
||||
|
||||
<h4><a name="tag_13_28_08"></a>CHANGE HISTORY</h4>
|
||||
|
||||
<blockquote>
|
||||
<p>First released in Issue 5. Included for alignment with the POSIX Realtime Extension.</p>
|
||||
</blockquote>
|
||||
|
||||
<h4><a name="tag_13_28_09"></a>Issue 6</h4>
|
||||
|
||||
<blockquote>
|
||||
<p>The <i><mqueue.h></i> header is marked as part of the Message Passing option.</p>
|
||||
|
||||
<p>The <a href="../functions/mq_timedreceive.html"><i>mq_timedreceive</i>()</a> and <a href=
|
||||
"../functions/mq_timedsend.html"><i>mq_timedsend</i>()</a> functions are added for alignment with
|
||||
IEEE Std 1003.1d-1999.</p>
|
||||
|
||||
<p>The <b>restrict</b> keyword is added to the prototypes for <a href="../functions/mq_setattr.html"><i>mq_setattr</i>()</a> and <a
|
||||
href="../functions/mq_timedreceive.html"><i>mq_timedreceive</i>()</a>.</p>
|
||||
</blockquote>
|
||||
|
||||
<div class="box"><em>End of informative text.</em></div>
|
||||
|
||||
<hr>
|
||||
<hr size="2" noshade>
|
||||
<center><font size="2"><!--footer start-->
|
||||
UNIX ® is a registered Trademark of The Open Group.<br>
|
||||
POSIX ® is a registered Trademark of The IEEE.<br>
|
||||
[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
|
||||
"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
|
||||
]</font></center>
|
||||
|
||||
<!--footer end-->
|
||||
<hr size="2" noshade>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
Reference in New Issue
Block a user