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# IO::Poll

Perl 5 version 22.0 documentation
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# IO::Poll

- NAME
- SYNOPSIS
- DESCRIPTION
- METHODS
- SEE ALSO
- AUTHOR
- COPYRIGHT

# 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 to <perlbug@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.

Page index

- NAME
- SYNOPSIS
- DESCRIPTION
- METHODS
- SEE ALSO
- AUTHOR
- COPYRIGHT