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Revision 1.86 by root, Wed Apr 2 11:00:58 2008 UTC vs.
Revision 1.94 by root, Tue May 20 23:54:05 2008 UTC

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56=head1 DESCRIPTION 56=head1 DESCRIPTION
57 57
58This module provides an interface to libev 58This module provides an interface to libev
59(L<http://software.schmorp.de/pkg/libev.html>). While the documentation 59(L<http://software.schmorp.de/pkg/libev.html>). While the documentation
60below is comprehensive, one might also consult the documentation of libev 60below is comprehensive, one might also consult the documentation of libev
61itself (L<http://cvs.schmorp.de/libev/ev.html>) for more subtle details on 61itself (L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod>) for more
62watcher semantics or some discussion on the available backends, or how to 62subtle details on watcher semantics or some discussion on the available
63force a specific backend with C<LIBEV_FLAGS>, or just about in any case 63backends, or how to force a specific backend with C<LIBEV_FLAGS>, or just
64because it has much more detailed information. 64about in any case because it has much more detailed information.
65
66This module is very fast and scalable. It is actually so fast that you
67can use it through the L<AnyEvent> module, stay portable to other event
68loops (if you don't rely on any watcher types not available through it)
69and still be faster than with any other event loop currently supported in
70Perl.
65 71
66=cut 72=cut
67 73
68package EV; 74package EV;
69 75
70use strict; 76use strict;
71 77
72BEGIN { 78BEGIN {
73 our $VERSION = '3.2'; 79 our $VERSION = '3.4';
74 use XSLoader; 80 use XSLoader;
75 XSLoader::load "EV", $VERSION; 81 XSLoader::load "EV", $VERSION;
76} 82}
77 83
78@EV::IO::ISA = 84@EV::IO::ISA =
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562time the periodic watcher gets scheduled, the reschedule callback 568time the periodic watcher gets scheduled, the reschedule callback
563($reschedule_cb) will be called with the watcher as first, and the current 569($reschedule_cb) will be called with the watcher as first, and the current
564time as second argument. 570time as second argument.
565 571
566I<This callback MUST NOT stop or destroy this or any other periodic 572I<This callback MUST NOT stop or destroy this or any other periodic
567watcher, ever>. If you need to stop it, return 1e30 and stop it 573watcher, ever, and MUST NOT call any event loop functions or methods>. If
568afterwards. 574you need to stop it, return 1e30 and stop it afterwards. You may create
575and start a C<EV::prepare> watcher for this task.
569 576
570It must return the next time to trigger, based on the passed time value 577It must return the next time to trigger, based on the passed time value
571(that is, the lowest time value larger than to the second argument). It 578(that is, the lowest time value larger than or equal to to the second
572will usually be called just before the callback will be triggered, but 579argument). It will usually be called just before the callback will be
573might be called at other times, too. 580triggered, but might be called at other times, too.
574 581
575This can be used to create very complex timers, such as a timer that 582This can be used to create very complex timers, such as a timer that
576triggers on each midnight, local time (actually 24 hours after the last 583triggers on each midnight, local time (actually 24 hours after the last
577midnight, to keep the example simple. If you know a way to do it correctly 584midnight, to keep the example simple. If you know a way to do it correctly
578in about the same space (without requiring elaborate modules), drop me a 585in about the same space (without requiring elaborate modules), drop me a
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979 986
980It is, however, possible to use them from the XS level. 987It is, however, possible to use them from the XS level.
981 988
982Please see the libev documentation for further details. 989Please see the libev documentation for further details.
983 990
991=over 4
992
993=item $w = EV::async $callback
994
995=item $w = EV::async_ns $callback
996
997=item $w->send
998
999=item $bool = $w->async_pending
1000
1001=back
1002
984 1003
985=head1 PERL SIGNALS 1004=head1 PERL SIGNALS
986 1005
987While Perl signal handling (C<%SIG>) is not affected by EV, the behaviour 1006While Perl signal handling (C<%SIG>) is not affected by EV, the behaviour
988with EV is as the same as any other C library: Perl-signals will only be 1007with EV is as the same as any other C library: Perl-signals will only be
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1037 1056
1038=head1 SEE ALSO 1057=head1 SEE ALSO
1039 1058
1040L<EV::ADNS> (asynchronous DNS), L<Glib::EV> (makes Glib/Gtk2 use EV as 1059L<EV::ADNS> (asynchronous DNS), L<Glib::EV> (makes Glib/Gtk2 use EV as
1041event loop), L<EV::Glib> (embed Glib into EV), L<Coro::EV> (efficient 1060event loop), L<EV::Glib> (embed Glib into EV), L<Coro::EV> (efficient
1042coroutines with EV), L<Net::SNMP::EV> (asynchronous SNMP). 1061coroutines with EV), L<Net::SNMP::EV> (asynchronous SNMP), L<AnyEvent> for
1062event-loop agnostic and portable event driven programming.
1043 1063
1044=head1 AUTHOR 1064=head1 AUTHOR
1045 1065
1046 Marc Lehmann <schmorp@schmorp.de> 1066 Marc Lehmann <schmorp@schmorp.de>
1047 http://home.schmorp.de/ 1067 http://home.schmorp.de/

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