| … | |
… | |
| 598 | |
598 | |
| 599 | =item $w = $loop->timer ($after, $repeat, $callback) |
599 | =item $w = $loop->timer ($after, $repeat, $callback) |
| 600 | |
600 | |
| 601 | =item $w = $loop->timer_ns ($after, $repeat, $callback) |
601 | =item $w = $loop->timer_ns ($after, $repeat, $callback) |
| 602 | |
602 | |
| 603 | Calls the callback after C<$after> seconds (which may be fractional). If |
603 | Calls the callback after C<$after> seconds (which may be fractional or |
| 604 | C<$repeat> is non-zero, the timer will be restarted (with the $repeat |
604 | negative). If C<$repeat> is non-zero, the timer will be restarted (with |
| 605 | value as $after) after the callback returns. |
605 | the $repeat value as $after) after the callback returns. |
| 606 | |
606 | |
| 607 | This means that the callback would be called roughly after C<$after> |
607 | This means that the callback would be called roughly after C<$after> |
| 608 | seconds, and then every C<$repeat> seconds. The timer does his best not |
608 | seconds, and then every C<$repeat> seconds. The timer does his best not |
| 609 | to drift, but it will not invoke the timer more often then once per event |
609 | to drift, but it will not invoke the timer more often then once per event |
| 610 | loop iteration, and might drift in other cases. If that isn't acceptable, |
610 | loop iteration, and might drift in other cases. If that isn't acceptable, |
| … | |
… | |
| 682 | surpasses this time. |
682 | surpasses this time. |
| 683 | |
683 | |
| 684 | =item * repeating interval timer ($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 * $interval> time (for the lowest integer N) and then repeat, |
| 688 | regardless of any time jumps. |
688 | regardless of any time jumps. Note that, since C<N> can be negative, the |
|
|
689 | first trigger can happen before C<$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" }; |
| … | |
… | |
| 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 |
|
|
| 725 | note :): |
|
|
| 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 |
