/ 
Linux-FD-0.002
River stage one • 2 direct dependents • 2 total dependents
/ Linux::FD::Timer

NAME

Linux::FD::Timer - Timer filehandles for Linux

VERSION

Version 0.002

SYNOPSIS

use Linux::FD::Timer;

my $fh = Linux::FD::Timer->new('monotonic');
$fh->set_timeout(10, 10);
while (1) {
    #do something..
    $fh->wait; #until the 10 seconds have passed.
}

DESCRIPTION

This module creates and operates on a timer that delivers timer expiration notifications via a file descriptor. It provides an alternative to the use of Time::HiRes' setitimer or POSIX::RT::Timer, with the advantage that the file descriptor may easily be monitored by mechanisms such as select, poll, and epoll.

METHODS

new($clockid)

This creates a new timer object, and returns a file handle that refers to that timer. The clockid argument specifies the clock that is used to mark the progress of the timer, and must be either 'realtime' or 'monotonic'. realtime is a settable system-wide clock. monotonic is a non-settable clock that is not affected by discontinuous changes in the system clock (e.g., manual changes to system time). The current value of each of these clocks can be retrieved using POSIX::RT::Clock. The handle will be non-blocking by default.

get_timeout()

Get the timeout value. In list context, it also returns the interval value. Note that this value is always relative to the current time.

set_timeout(value, $interval = 0, $abs_time = 0)

Set the timer and interval values. If $abstime is true, they are absolute values, otherwise they are relative to the current time. Returns the old value like get_time does.

receive

If the timer has already expired one or more times since its settings were last modified using settime(), or since the last successful wait, then receive returns an unsigned 8-byte integer containing the number of expirations that have occurred. If not it either returns undef or it blocks (if the handle is blocking).

AUTHOR

Leon Timmermans, <leont at cpan.org>

BUGS

Please report any bugs or feature requests to bug-linux-fd at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Linux-FD. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc Linux::FD::Timer

You can also look for information at:

LICENSE AND COPYRIGHT

Copyright 2010 Leon Timmermans.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.