1IO::Poll(3pm)          Perl Programmers Reference Guide          IO::Poll(3pm)
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NAME

6       IO::Poll - Object interface to system poll call
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SYNOPSIS

9           use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP);
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11           $poll = IO::Poll->new();
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13           $poll->mask($input_handle => POLLIN);
14           $poll->mask($output_handle => POLLOUT);
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16           $poll->poll($timeout);
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18           $ev = $poll->events($input);
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DESCRIPTION

21       "IO::Poll" is a simple interface to the system level poll routine.
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METHODS

24       mask ( IO [, EVENT_MASK ] )
25           If EVENT_MASK is given, then, if EVENT_MASK is non-zero, IO is
26           added to the list of file descriptors and the next call to poll
27           will check for any event specified in EVENT_MASK. If EVENT_MASK is
28           zero then IO will be removed from the list of file descriptors.
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30           If EVENT_MASK is not given then the return value will be the
31           current event mask value for IO.
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33       poll ( [ TIMEOUT ] )
34           Call the system level poll routine. If TIMEOUT is not specified
35           then the call will block. Returns the number of handles which had
36           events happen, or -1 on error.
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38       events ( IO )
39           Returns the event mask which represents the events that happened on
40           IO during the last call to "poll".
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42       remove ( IO )
43           Remove IO from the list of file descriptors for the next poll.
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45       handles( [ EVENT_MASK ] )
46           Returns a list of handles. If EVENT_MASK is not given then a list
47           of all handles known will be returned. If EVENT_MASK is given then
48           a list of handles will be returned which had one of the events
49           specified by EVENT_MASK happen during the last call ti "poll"
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SEE ALSO

52       poll(2), IO::Handle, IO::Select
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AUTHOR

55       Graham Barr. Currently maintained by the Perl Porters.  Please report
56       all bugs to <perlbug@perl.org>.
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59       Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights
60       reserved.  This program is free software; you can redistribute it
61       and/or modify it under the same terms as Perl itself.
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65perl v5.26.3                      2018-03-01                     IO::Poll(3pm)
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