OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [doc/] [html/] [ref/] [tcpip-freebsd-enhanced-select.html] - Rev 588

Go to most recent revision | Compare with Previous | Blame | View Log

<!-- 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  -->
<!-- or later (the latest version is presently available at          -->
<!-- http://www.opencontent.org/openpub/).                           -->
<!-- Distribution of the work or derivative of the work in any       -->
<!-- standard (paper) book form is prohibited unless prior           -->
<!-- permission is obtained from the copyright holder.               -->
<HTML
><HEAD
><TITLE
>Enhanced Select()</TITLE
><meta name="MSSmartTagsPreventParsing" content="TRUE">
<META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
TITLE="eCos Reference Manual"
HREF="ecos-ref.html"><LINK
REL="UP"
TITLE="APIs"
HREF="tcpip-freebsd-tcpip-apis.html"><LINK
REL="PREVIOUS"
TITLE="APIs"
HREF="tcpip-freebsd-tcpip-apis.html"><LINK
REL="NEXT"
TITLE="OpenBSD TCP/IP Stack port for eCos"
HREF="tcpip-openbsd.html"></HEAD
><BODY
CLASS="SECT1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>eCos Reference Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="tcpip-freebsd-tcpip-apis.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 41. APIs</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="tcpip-openbsd.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="TCPIP-FREEBSD-ENHANCED-SELECT">Enhanced Select()</H1
><P
>The network stack supports an extension to the standard select
semantics which allows all threads that are waiting to be restarted
even if the select conditions are not satisfied.</P
><P
>The standard select() API:  </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>int  
<TT
CLASS="FUNCTION"
>select</TT
>(int nfd,
       fd_set &#0042;in, fd_set &#0042;out, fd_set &#0042;ex,
       struct timeval &#0042;tv); </PRE
></TD
></TR
></TABLE
><P
>does not support the restart.</P
><P
>The additional API:  </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>int  
<TT
CLASS="FUNCTION"
>cyg_select_with_abort</TT
>(int nfd,
       fd_set &#0042;in, fd_set &#0042;out, fd_set &#0042;ex,
       struct timeval &#0042;tv)</PRE
></TD
></TR
></TABLE
><P
>behaves exactly as select() with the additional feature that
a call to</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void <TT
CLASS="FUNCTION"
>cyg_select_abort</TT
>(void)</PRE
></TD
></TR
></TABLE
><P
>will cause all threads waiting in any
<TT
CLASS="FUNCTION"
>cyg_select_with_abort()</TT
> call
to cease waiting and continue execution.</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="tcpip-freebsd-tcpip-apis.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ecos-ref.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="tcpip-openbsd.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>APIs</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="tcpip-freebsd-tcpip-apis.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>OpenBSD TCP/IP Stack port for eCos</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>

Go to most recent revision | Compare with Previous | Blame | View Log

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.