… | |
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682 | surpasses this time. |
682 | surpasses this time. |
683 | |
683 | |
684 | =item * repeating interval timer ($interval > 0, $reschedule_cb = 0) |
684 | =item * repeating interval timer ($interval > 0, $reschedule_cb = 0) |
685 | |
685 | |
686 | In this mode the watcher will always be scheduled to time out at the |
686 | In this mode the watcher will always be scheduled to time out at the |
687 | next C<$at + N * $interval> time (for some integer N) and then repeat, |
687 | next C<$at + N * $interval> time (for the lowest integer N) and then repeat, |
688 | regardless of any time jumps. |
688 | regardless of any time jumps. Note that, since C<N> can be negative, the |
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689 | first trigger can happen before C<$at>. |
689 | |
690 | |
690 | This can be used to create timers that do not drift with respect to system |
691 | This can be used to create timers that do not drift with respect to system |
691 | time: |
692 | time: |
692 | |
693 | |
693 | my $hourly = EV::periodic 0, 3600, 0, sub { print "once/hour\n" }; |
694 | my $hourly = EV::periodic 0, 3600, 0, sub { print "once/hour\n" }; |
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717 | (that is, the lowest time value larger than or equal to to the second |
718 | (that is, the lowest time value larger than or equal to to the second |
718 | argument). It will usually be called just before the callback will be |
719 | argument). It will usually be called just before the callback will be |
719 | triggered, but might be called at other times, too. |
720 | triggered, but might be called at other times, too. |
720 | |
721 | |
721 | This can be used to create very complex timers, such as a timer that |
722 | This can be used to create very complex timers, such as a timer that |
722 | triggers on each midnight, local time (actually 24 hours after the last |
723 | triggers on each midnight, local time (actually one day after the last |
723 | midnight, to keep the example simple. If you know a way to do it correctly |
724 | midnight, to keep the example simple): |
724 | in about the same space (without requiring elaborate modules), drop me a |
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725 | note :): |
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726 | |
725 | |
727 | my $daily = EV::periodic 0, 0, sub { |
726 | my $daily = EV::periodic 0, 0, sub { |
728 | my ($w, $now) = @_; |
727 | my ($w, $now) = @_; |
729 | |
728 | |
730 | use Time::Local (); |
729 | use Time::Local (); |
731 | my (undef, undef, undef, $d, $m, $y) = localtime $now; |
730 | my (undef, undef, undef, $d, $m, $y) = localtime $now; |
732 | 86400 + Time::Local::timelocal 0, 0, 0, $d, $m, $y |
731 | Time::Local::timelocal_nocheck 0, 0, 0, $d + 1, $m, $y |
733 | }, sub { |
732 | }, sub { |
734 | print "it's midnight or likely shortly after, now\n"; |
733 | print "it's midnight or likely shortly after, now\n"; |
735 | }; |
734 | }; |
736 | |
735 | |
737 | =back |
736 | =back |