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<HTML>
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<TITLE>IO::Poll - Object interface to system poll call</TITLE>
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<STRONG><P CLASS=block> IO::Poll - Object interface to system poll call</P></STRONG>
</TD></TR>
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<A NAME="__index__"></A>
<!-- INDEX BEGIN -->
<UL>
<LI><A HREF="#name">NAME</A></LI><LI><A HREF="#supportedplatforms">SUPPORTED PLATFORMS</A></LI>
<LI><A HREF="#synopsis">SYNOPSIS</A></LI>
<LI><A HREF="#description">DESCRIPTION</A></LI>
<LI><A HREF="#methods">METHODS</A></LI>
<LI><A HREF="#see also">SEE ALSO</A></LI>
<LI><A HREF="#author">AUTHOR</A></LI>
<LI><A HREF="#copyright">COPYRIGHT</A></LI>
</UL>
<!-- INDEX END -->
<HR>
<P>
<H1><A NAME="name">NAME</A></H1>
<P>IO::Poll - Object interface to system poll call</P>
<P>
<HR>
<H1><A NAME="supportedplatforms">SUPPORTED PLATFORMS</A></H1>
<UL>
<LI>Linux</LI>
<LI>Solaris</LI>
<LI>Windows</LI>
</UL>
<HR>
<H1><A NAME="synopsis">SYNOPSIS</A></H1>
<PRE>
use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP);</PRE>
<PRE>
$poll = new IO::Poll;</PRE>
<PRE>
$poll->mask($input_handle => POLLRDNORM | POLLIN | POLLHUP);
$poll->mask($output_handle => POLLWRNORM);</PRE>
<PRE>
$poll->poll($timeout);</PRE>
<PRE>
$ev = $poll->events($input);</PRE>
<P>
<HR>
<H1><A NAME="description">DESCRIPTION</A></H1>
<P><CODE>IO::Poll</CODE> is a simple interface to the system level poll routine.</P>
<P>
<HR>
<H1><A NAME="methods">METHODS</A></H1>
<DL>
<DT><STRONG><A NAME="item_mask">mask ( IO [, EVENT_MASK ] )</A></STRONG><BR>
<DD>
If EVENT_MASK is given, then, if EVENT_MASK is non-zero, IO is added to the
list of file descriptors and the next call to poll will check for
any event specified in EVENT_MASK. If EVENT_MASK is zero then IO will be
removed from the list of file descriptors.
<P>If EVENT_MASK is not given then the return value will be the current
event mask value for IO.</P>
<P></P>
<DT><STRONG><A NAME="item_poll">poll ( [ TIMEOUT ] )</A></STRONG><BR>
<DD>
Call the system level poll routine. If TIMEOUT is not specified then the
call will block. Returns the number of handles which had events
happen, or -1 on error.
<P></P>
<DT><STRONG><A NAME="item_events">events ( IO )</A></STRONG><BR>
<DD>
Returns the event mask which represents the events that happend on IO
during the last call to <A HREF="#item_poll"><CODE>poll</CODE></A>.
<P></P>
<DT><STRONG><A NAME="item_remove">remove ( IO )</A></STRONG><BR>
<DD>
Remove IO from the list of file descriptors for the next poll.
<P></P>
<DT><STRONG><A NAME="item_handles">handles( [ EVENT_MASK ] )</A></STRONG><BR>
<DD>
Returns a list of handles. If EVENT_MASK is not given then a list of all
handles known will be returned. If EVENT_MASK is given then a list
of handles will be returned which had one of the events specified by
EVENT_MASK happen during the last call ti <A HREF="#item_poll"><CODE>poll</CODE></A>
<P></P></DL>
<P>
<HR>
<H1><A NAME="see also">SEE ALSO</A></H1>
<P><A HREF="#item_poll">poll(2)</A>, <A HREF="../../lib/IO/Handle.html">the IO::Handle manpage</A>, <A HREF="../../lib/IO/Select.html">the IO::Select manpage</A></P>
<P>
<HR>
<H1><A NAME="author">AUTHOR</A></H1>
<P>Graham Barr. Currently maintained by the Perl Porters. Please report all
bugs to <<A HREF="mailto:perl5-porters@perl.org">perl5-porters@perl.org</A>>.</P>
<P>
<HR>
<H1><A NAME="copyright">COPYRIGHT</A></H1>
<P>Copyright (c) 1997-8 Graham Barr <<A HREF="mailto:gbarr@pobox.com">gbarr@pobox.com</A>>. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.</P>
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<STRONG><P CLASS=block> IO::Poll - Object interface to system poll call</P></STRONG>
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