IO::Poll(3pm) Perl Programmers Reference Guide IO::Poll(3pm)

IO::Poll - Object interface to system poll call

    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);

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

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.

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.
Returns the event mask which represents the events that happened on IO during the last call to "poll".
Remove IO from the list of file descriptors for the next poll.
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 "poll"

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

Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perlbug@perl.org>.

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.

2022-02-19 perl v5.34.1