NAME
Time::HiRes::Sleep::Until - Provides common ways to sleep until...
SYNOPSIS
use Time::HiRes::Sleep::Until;
my $su = Time::HiRes::Sleep::Until->new;
my $slept = $su->epoch($epoch); # epoch is a calculated time + $seconds
my $slept = $su->mark(20); # sleep until 20 second mark of the clock :00, :20, or :40
my $slept = $su->second(45); # sleep until 45 seconds after the minuteDESCRIPTION
Sleep Until provides sleep wrappers for sleep functions that I commonly need. These methods are simply wrappers around Time::HiRes and Math::Round.
We use this package to make measurements at the same time within the minute for integration with RRDtool.
USAGE
use strict;
use warnings;
use DateTime;
use Time::HiRes::Sleep::Until;
my $su=Time::HiRes::Sleep::Until->new;
do {
print DateTime->now, "\n"; #make a measurment three times a minute
} while ($su->mark(20));Perl One liner
perl -MTime::HiRes::Sleep::Until -e 'printf "Slept: %s\n", Time::HiRes::Sleep::Until->new->top'CONSTRUCTOR
new
use Time::HiRes::Sleep::Until;
my $su=Time::HiRes::Sleep::Until->new;METHODS
epoch
Sleep until provided epoch in float seconds.
while ($CONTINUE) {
my $sleep_epoch = $su->time + 60/8;
do_work(); #run process that needs to run back to back but not more than 8 times per minute
$su->epoch($sleep_epoch); #sleep(7.5 - runtime). if runtime > 7.5 seconds does not sleep
}mark
Sleep until next second mark;
my $slept=$su->mark(20); # 20 second mark, i.e. 3 times a minute on the 20s
my $slept=$su->mark(10); # 10 second mark, i.e. 6 times a minute on the 10s
my $slept=$su->mark(6); # 6 second mark, i.e. 10 times a minute on 0,6,12,...second
Sleep until the provided seconds after the minute
my $slept=$su->second(0); #sleep until top of minute
my $slept=$su->second(30); #sleep until bottom of minutetop
Sleep until the top of the minute
my $slept=$su->top; #alias for $su->second(0);time
Method to access Time::HiRes time without another import.
sleep
Method to access Time::HiRes sleep without another import.
LIMITATIONS
The mathematics add a small amount of delay for which we do not account. Testing routinely passes with 100th of a second accuracy and typically with millisecond accuracy.
BUGS
Please log on RT and send an email to the author.
SUPPORT
DavisNetworks.com supports all Perl applications including this package.
AUTHOR
Michael R. Davis
CPAN ID: MRDVT
Satellite Tracking of People, LLC
mdavis@stopllc.com
http://www.stopllc.com/COPYRIGHT
This program is free software licensed under the...
The General Public License (GPL), Version 2, June 1991
The full text of the license can be found in the LICENSE file included with this module.