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+<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
+<!-- This material may be distributed only subject to the terms      -->
+<!-- and conditions set forth in the Open Publication License, v1.0  -->
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+<HTML
+><HEAD
+><TITLE
+>Message Passing [POSIX Section 15]</TITLE
+><meta name="MSSmartTagsPreventParsing" content="TRUE">
+<META
+NAME="GENERATOR"
+CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
+"><LINK
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+TITLE="eCos Reference Manual"
+HREF="ecos-ref.html"><LINK
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+TITLE="POSIX Standard Support"
+HREF="posix-standard-support.html"><LINK
+REL="PREVIOUS"
+TITLE="Clocks and Timers [POSIX Section 14]"
+HREF="posix-clocks-and-timers.html"><LINK
+REL="NEXT"
+TITLE="Thread Management [POSIX Section 16]"
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+><BODY
+CLASS="SECT1"
+BGCOLOR="#FFFFFF"
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+VLINK="#840084"
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+><DIV
+CLASS="NAVHEADER"
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+SUMMARY="Header navigation table"
+WIDTH="100%"
+BORDER="0"
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+CELLSPACING="0"
+><TR
+><TH
+COLSPAN="3"
+ALIGN="center"
+>eCos Reference Manual</TH
+></TR
+><TR
+><TD
+WIDTH="10%"
+ALIGN="left"
+VALIGN="bottom"
+><A
+HREF="posix-clocks-and-timers.html"
+ACCESSKEY="P"
+>Prev</A
+></TD
+><TD
+WIDTH="80%"
+ALIGN="center"
+VALIGN="bottom"
+>Chapter 31. POSIX Standard Support</TD
+><TD
+WIDTH="10%"
+ALIGN="right"
+VALIGN="bottom"
+><A
+HREF="posix-thread-management.html"
+ACCESSKEY="N"
+>Next</A
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+><HR
+ALIGN="LEFT"
+WIDTH="100%"></DIV
+><DIV
+CLASS="SECT1"
+><H1
+CLASS="SECT1"
+><A
+NAME="POSIX-MESSAGE-PASSING">Message Passing &#0091;POSIX Section 15&#0093;</H1
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13246">Functions Implemented</H2
+><TABLE
+BORDER="5"
+BGCOLOR="#E0E0F0"
+WIDTH="70%"
+><TR
+><TD
+><PRE
+CLASS="SCREEN"
+>mqd&#0095;t mq&#0095;open( const char &#0042;name, int  oflag, ... ); 
+int mq&#0095;close( mqd&#0095;t  mqdes ); 
+int mq&#0095;unlink( const char &#0042;name );
+int mq&#0095;send( mqd&#0095;t mqdes, const char &#0042;msg&#0095;ptr,
+            size&#0095;t msg&#0095;len, unsigned int msg&#0095;prio ); 
+ssize&#0095;t mq&#0095;receive( mqd&#0095;t mqdes, char &#0042;msg&#0095;ptr,
+                   size&#0095;t msg&#0095;len, unsigned int &#0042;msg&#0095;prio );
+int mq&#0095;setattr( mqd&#0095;t mqdes, const struct mq&#0095;attr &#0042;mqstat,
+               struct mq&#0095;attr &#0042;omqstat ); 
+int mq&#0095;getattr( mqd&#0095;t mqdes, struct mq&#0095;attr &#0042;mqstat ); 
+int mq&#0095;notify( mqd&#0095;t mqdes, const struct sigevent &#0042;notification );</PRE
+></TD
+></TR
+></TABLE
+><P
+>From POSIX 1003.1d draft: </P
+><TABLE
+BORDER="5"
+BGCOLOR="#E0E0F0"
+WIDTH="70%"
+><TR
+><TD
+><PRE
+CLASS="SCREEN"
+>int mq&#0095;send( mqd&#0095;t mqdes, const char &#0042;msg&#0095;ptr,
+            size&#0095;t msg&#0095;len, unsigned int msg&#0095;prio,
+             const struct timespec *abs_timeout ); 
+ssize&#0095;t mq&#0095;receive( mqd&#0095;t mqdes, char &#0042;msg&#0095;ptr,
+                   size&#0095;t msg&#0095;len, unsigned int &#0042;msg&#0095;prio,
+             const struct timespec *abs_timeout );</PRE
+></TD
+></TR
+></TABLE
+></DIV
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13251">Functions Omitted</H2
+><P
+>&lt;none&gt;</P
+></DIV
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13254">Notes</H2
+><P
+></P
+><UL
+><LI
+><P
+>    The presence of message queues is controlled by the
+    CYGPKG&#0095;POSIX&#0095;MQUEUES option.  Setting this will
+    cause &#0091;&#0095;POSIX&#0095;MESSAGE&#0095;PASSING&#0093; to
+    be defined and the message queue API to be made available.
+    </P
+></LI
+><LI
+><P
+>    Message queues are not currently filesystem objects. They live in
+    their own name and descriptor spaces.
+    </P
+></LI
+></UL
+></DIV
+></DIV
+><DIV
+CLASS="NAVFOOTER"
+><HR
+ALIGN="LEFT"
+WIDTH="100%"><TABLE
+SUMMARY="Footer navigation table"
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+WIDTH="33%"
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+>Prev</A
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+WIDTH="34%"
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+><TD
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+>Next</A
+></TD
+></TR
+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+>Clocks and Timers &#0091;POSIX Section 14&#0093;</TD
+><TD
+WIDTH="34%"
+ALIGN="center"
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+HREF="posix-standard-support.html"
+ACCESSKEY="U"
+>Up</A
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+><TD
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+>Thread Management &#0091;POSIX Section 16&#0093;</TD
+></TR
+></TABLE
+></DIV
+></BODY
+></HTML
+>
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