IO::Poll(3p) | Perl Programmers Reference Guide | IO::Poll(3p)

# 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.

2025-01-28 | perl v5.40.1