IO::Poll(3)

NAME
IO::Poll - Object interface to system poll call

SYNOPSIS
    use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP);

    $poll = IO::Poll->new();

    $poll->mask($input_handle => POLLIN);
    $poll->mask($output_handle => POLLOUT);

    $poll->poll($timeout);

    $ev = $poll->events($input);

DESCRIPTION
"IO::Poll" is a simple interface to the system level poll routine.

METHODS

mask ( IO [, EVENT_MASK ] )
    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.

    If EVENT_MASK is not given then the return value will be the current event mask value for IO.

poll ( [ TIMEOUT ] )
    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.

events ( IO )
    Returns the event mask which represents the events that happened on IO during the last call to "poll".

remove ( IO )
    Remove IO from the list of file descriptors for the next poll.

handles( [ EVENT_MASK ] )
    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 to "poll".

SEE ALSO
poll(2), IO::Handle, IO::Select

AUTHOR
Graham Barr. Currently maintained by the Perl Porters. Please report all bugs at <https://github.com/Perl/perl5/issues>.

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.