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 ti "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.

perl v5.38.2                                       2025-04-08                                    IO::Poll(3perl)