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IO::Poll

Section: Perl Programmers Reference Guide (3)
Updated: 2001-09-21
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NAME

IO::Poll - Object interface to system poll call  

SYNOPSIS

    use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP);

    $poll = new IO::Poll;

    $poll->mask($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 to <perl5-porters@perl.org>.  

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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
METHODS
SEE ALSO
AUTHOR
COPYRIGHT




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