1IO::Async::Timer::AbsolUusteer(3C)ontributed Perl DocumeInOt:a:tAisoynnc::Timer::Absolute(3)
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NAME

6       "IO::Async::Timer::Absolute" - event callback at a fixed future time
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SYNOPSIS

9        use IO::Async::Timer::Absolute;
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11        use POSIX qw( mktime );
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13        use IO::Async::Loop;
14        my $loop = IO::Async::Loop->new;
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16        my @time = gmtime;
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18        my $timer = IO::Async::Timer::Absolute->new(
19           time => mktime( 0, 0, 0, $time[3]+1, $time[4], $time[5] ),
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21           on_expire => sub {
22              print "It's midnight\n";
23              $loop->stop;
24           },
25        );
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27        $loop->add( $timer );
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29        $loop->run;
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DESCRIPTION

32       This subclass of IO::Async::Timer implements one-shot events at a fixed
33       time in the future. The object waits for a given timestamp, and invokes
34       its callback at that point in the future.
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36       For a "Timer" object that waits for a delay relative to the time it is
37       started, see instead IO::Async::Timer::Countdown.
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EVENTS

40       The following events are invoked, either using subclass methods or CODE
41       references in parameters:
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43   on_expire
44       Invoked when the timer expires.
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PARAMETERS

47       The following named parameters may be passed to "new" or "configure":
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49   on_expire => CODE
50       CODE reference for the "on_expire" event.
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52   time => NUM
53       The epoch time at which the timer will expire.
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55       Once constructed, the timer object will need to be added to the "Loop"
56       before it will work.
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58       Unlike other timers, it does not make sense to "start" this object,
59       because its expiry time is absolute, and not relative to the time it is
60       started.
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AUTHOR

63       Paul Evans <leonerd@leonerd.org.uk>
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67perl v5.28.1                      2019-02-02     IO::Async::Timer::Absolute(3)