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.