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.\" ========================================================================
.\"
.IX Title "IO::Poll 3"
.TH IO::Poll 3 "2012-11-03" "perl v5.12.5" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
IO::Poll \- Object interface to system poll call
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP);
\&
\&    $poll = new IO::Poll;
\&
\&    $poll\->mask($input_handle => POLLIN);
\&    $poll\->mask($output_handle => POLLOUT);
\&
\&    $poll\->poll($timeout);
\&
\&    $ev = $poll\->events($input);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`IO::Poll\*(C'\fR is a simple interface to the system level poll routine.
.SH "METHODS"
.IX Header "METHODS"
.IP "mask ( \s-1IO\s0 [, \s-1EVENT_MASK\s0 ] )" 4
.IX Item "mask ( IO [, EVENT_MASK ] )"
If \s-1EVENT_MASK\s0 is given, then, if \s-1EVENT_MASK\s0 is non-zero, \s-1IO\s0 is added to the
list of file descriptors and the next call to poll will check for
any event specified in \s-1EVENT_MASK\s0. If \s-1EVENT_MASK\s0 is zero then \s-1IO\s0 will be
removed from the list of file descriptors.
.Sp
If \s-1EVENT_MASK\s0 is not given then the return value will be the current
event mask value for \s-1IO\s0.
.IP "poll ( [ \s-1TIMEOUT\s0 ] )" 4
.IX Item "poll ( [ TIMEOUT ] )"
Call the system level poll routine. If \s-1TIMEOUT\s0 is not specified then the
call will block. Returns the number of handles which had events
happen, or \-1 on error.
.IP "events ( \s-1IO\s0 )" 4
.IX Item "events ( IO )"
Returns the event mask which represents the events that happened on \s-1IO\s0
during the last call to \f(CW\*(C`poll\*(C'\fR.
.IP "remove ( \s-1IO\s0 )" 4
.IX Item "remove ( IO )"
Remove \s-1IO\s0 from the list of file descriptors for the next poll.
.IP "handles( [ \s-1EVENT_MASK\s0 ] )" 4
.IX Item "handles( [ EVENT_MASK ] )"
Returns a list of handles. If \s-1EVENT_MASK\s0 is not given then a list of all
handles known will be returned. If \s-1EVENT_MASK\s0 is given then a list
of handles will be returned which had one of the events specified by
\&\s-1EVENT_MASK\s0 happen during the last call ti \f(CW\*(C`poll\*(C'\fR

.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE 
=
Availability	runtime/perl-512
=
Stability	Uncommitted
.TE 
.PP
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIpoll\fR\|(2), IO::Handle, IO::Select
.SH "AUTHOR"
.IX Header "AUTHOR"
Graham Barr. Currently maintained by the Perl Porters.  Please report all
bugs to <perl5\-porters@perl.org>.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 1997\-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.


.SH NOTES

.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland.  The original community source was downloaded from  http://www.cpan.org/src/5.0/perl-5.12.5.tar.bz2

Further information about this software can be found on the open source community website at http://www.perl.org/.