Section: Perl Programmers Reference Guide (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);
$ev = $poll->events($input);
is a simple interface to the system level poll routine.
- 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"
(2), IO::Handle, IO::Select
Graham Barr. Currently maintained by the Perl Porters. Please report all
bugs to <firstname.lastname@example.org
Copyright (c) 1997-8 Graham Barr <email@example.com
>. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.