1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | AnyEvent - provide framework for multiple event loops |
3 | AnyEvent - the DBI of event loop programming |
4 | |
4 | |
5 | EV, Event, Glib, Tk, Perl, Event::Lib, Qt and POE are various supported |
5 | EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt |
6 | event loops. |
6 | and POE are various supported event loops/environments. |
7 | |
7 | |
8 | =head1 SYNOPSIS |
8 | =head1 SYNOPSIS |
9 | |
9 | |
10 | use AnyEvent; |
10 | use AnyEvent; |
11 | |
11 | |
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40 | =head1 INTRODUCTION/TUTORIAL |
40 | =head1 INTRODUCTION/TUTORIAL |
41 | |
41 | |
42 | This manpage is mainly a reference manual. If you are interested |
42 | This manpage is mainly a reference manual. If you are interested |
43 | in a tutorial or some gentle introduction, have a look at the |
43 | in a tutorial or some gentle introduction, have a look at the |
44 | L<AnyEvent::Intro> manpage. |
44 | L<AnyEvent::Intro> manpage. |
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45 | |
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46 | =head1 SUPPORT |
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47 | |
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48 | There is a mailinglist for discussing all things AnyEvent, and an IRC |
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49 | channel, too. |
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50 | |
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51 | See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software |
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52 | Repository>, at L<http://anyevent.schmorp.de>, for more info. |
45 | |
53 | |
46 | =head1 WHY YOU SHOULD USE THIS MODULE (OR NOT) |
54 | =head1 WHY YOU SHOULD USE THIS MODULE (OR NOT) |
47 | |
55 | |
48 | Glib, POE, IO::Async, Event... CPAN offers event models by the dozen |
56 | Glib, POE, IO::Async, Event... CPAN offers event models by the dozen |
49 | nowadays. So what is different about AnyEvent? |
57 | nowadays. So what is different about AnyEvent? |
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173 | my variables are only visible after the statement in which they are |
181 | my variables are only visible after the statement in which they are |
174 | declared. |
182 | declared. |
175 | |
183 | |
176 | =head2 I/O WATCHERS |
184 | =head2 I/O WATCHERS |
177 | |
185 | |
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186 | $w = AnyEvent->io ( |
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187 | fh => <filehandle_or_fileno>, |
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188 | poll => <"r" or "w">, |
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189 | cb => <callback>, |
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190 | ); |
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191 | |
178 | You can create an I/O watcher by calling the C<< AnyEvent->io >> method |
192 | You can create an I/O watcher by calling the C<< AnyEvent->io >> method |
179 | with the following mandatory key-value pairs as arguments: |
193 | with the following mandatory key-value pairs as arguments: |
180 | |
194 | |
181 | C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch |
195 | C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch |
182 | for events (AnyEvent might or might not keep a reference to this file |
196 | for events (AnyEvent might or might not keep a reference to this file |
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211 | undef $w; |
225 | undef $w; |
212 | }); |
226 | }); |
213 | |
227 | |
214 | =head2 TIME WATCHERS |
228 | =head2 TIME WATCHERS |
215 | |
229 | |
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230 | $w = AnyEvent->timer (after => <seconds>, cb => <callback>); |
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231 | |
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232 | $w = AnyEvent->timer ( |
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233 | after => <fractional_seconds>, |
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234 | interval => <fractional_seconds>, |
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235 | cb => <callback>, |
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236 | ); |
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237 | |
216 | You can create a time watcher by calling the C<< AnyEvent->timer >> |
238 | You can create a time watcher by calling the C<< AnyEvent->timer >> |
217 | method with the following mandatory arguments: |
239 | method with the following mandatory arguments: |
218 | |
240 | |
219 | C<after> specifies after how many seconds (fractional values are |
241 | C<after> specifies after how many seconds (fractional values are |
220 | supported) the callback should be invoked. C<cb> is the callback to invoke |
242 | supported) the callback should be invoked. C<cb> is the callback to invoke |
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347 | |
369 | |
348 | =back |
370 | =back |
349 | |
371 | |
350 | =head2 SIGNAL WATCHERS |
372 | =head2 SIGNAL WATCHERS |
351 | |
373 | |
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374 | $w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>); |
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375 | |
352 | You can watch for signals using a signal watcher, C<signal> is the signal |
376 | You can watch for signals using a signal watcher, C<signal> is the signal |
353 | I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl |
377 | I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl |
354 | callback to be invoked whenever a signal occurs. |
378 | callback to be invoked whenever a signal occurs. |
355 | |
379 | |
356 | Although the callback might get passed parameters, their value and |
380 | Although the callback might get passed parameters, their value and |
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368 | |
392 | |
369 | This watcher might use C<%SIG> (depending on the event loop used), |
393 | This watcher might use C<%SIG> (depending on the event loop used), |
370 | so programs overwriting those signals directly will likely not work |
394 | so programs overwriting those signals directly will likely not work |
371 | correctly. |
395 | correctly. |
372 | |
396 | |
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397 | Example: exit on SIGINT |
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398 | |
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399 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
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400 | |
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401 | =head3 Signal Races, Delays and Workarounds |
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402 | |
373 | Also note that many event loops (e.g. Glib, Tk, Qt, IO::Async) do not |
403 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
374 | support attaching callbacks to signals, which is a pity, as you cannot do |
404 | callbacks to signals in a generic way, which is a pity, as you cannot |
375 | race-free signal handling in perl. AnyEvent will try to do it's best, but |
405 | do race-free signal handling in perl, requiring C libraries for |
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406 | this. AnyEvent will try to do it's best, which means in some cases, |
376 | in some cases, signals will be delayed. The maximum time a signal might |
407 | signals will be delayed. The maximum time a signal might be delayed is |
377 | be delayed is specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 |
408 | specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This |
378 | seconds). This variable can be changed only before the first signal |
409 | variable can be changed only before the first signal watcher is created, |
379 | watcher is created, and should be left alone otherwise. Higher values |
410 | and should be left alone otherwise. This variable determines how often |
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411 | AnyEvent polls for signals (in case a wake-up was missed). Higher values |
380 | will cause fewer spurious wake-ups, which is better for power and CPU |
412 | will cause fewer spurious wake-ups, which is better for power and CPU |
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413 | saving. |
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414 | |
381 | saving. All these problems can be avoided by installing the optional |
415 | All these problems can be avoided by installing the optional |
382 | L<Async::Interrupt> module. |
416 | L<Async::Interrupt> module, which works with most event loops. It will not |
383 | |
417 | work with inherently broken event loops such as L<Event> or L<Event::Lib> |
384 | Example: exit on SIGINT |
418 | (and not with L<POE> currently, as POE does it's own workaround with |
385 | |
419 | one-second latency). For those, you just have to suffer the delays. |
386 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
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387 | |
420 | |
388 | =head2 CHILD PROCESS WATCHERS |
421 | =head2 CHILD PROCESS WATCHERS |
389 | |
422 | |
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423 | $w = AnyEvent->child (pid => <process id>, cb => <callback>); |
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424 | |
390 | You can also watch on a child process exit and catch its exit status. |
425 | You can also watch on a child process exit and catch its exit status. |
391 | |
426 | |
392 | The child process is specified by the C<pid> argument (if set to C<0>, it |
427 | The child process is specified by the C<pid> argument (one some backends, |
393 | watches for any child process exit). The watcher will triggered only when |
428 | using C<0> watches for any child process exit, on others this will |
394 | the child process has finished and an exit status is available, not on |
429 | croak). The watcher will be triggered only when the child process has |
395 | any trace events (stopped/continued). |
430 | finished and an exit status is available, not on any trace events |
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431 | (stopped/continued). |
396 | |
432 | |
397 | The callback will be called with the pid and exit status (as returned by |
433 | The callback will be called with the pid and exit status (as returned by |
398 | waitpid), so unlike other watcher types, you I<can> rely on child watcher |
434 | waitpid), so unlike other watcher types, you I<can> rely on child watcher |
399 | callback arguments. |
435 | callback arguments. |
400 | |
436 | |
… | |
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441 | # do something else, then wait for process exit |
477 | # do something else, then wait for process exit |
442 | $done->recv; |
478 | $done->recv; |
443 | |
479 | |
444 | =head2 IDLE WATCHERS |
480 | =head2 IDLE WATCHERS |
445 | |
481 | |
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482 | $w = AnyEvent->idle (cb => <callback>); |
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483 | |
446 | Sometimes there is a need to do something, but it is not so important |
484 | Sometimes there is a need to do something, but it is not so important |
447 | to do it instantly, but only when there is nothing better to do. This |
485 | to do it instantly, but only when there is nothing better to do. This |
448 | "nothing better to do" is usually defined to be "no other events need |
486 | "nothing better to do" is usually defined to be "no other events need |
449 | attention by the event loop". |
487 | attention by the event loop". |
450 | |
488 | |
… | |
… | |
476 | }); |
514 | }); |
477 | }); |
515 | }); |
478 | |
516 | |
479 | =head2 CONDITION VARIABLES |
517 | =head2 CONDITION VARIABLES |
480 | |
518 | |
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519 | $cv = AnyEvent->condvar; |
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520 | |
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521 | $cv->send (<list>); |
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522 | my @res = $cv->recv; |
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523 | |
481 | If you are familiar with some event loops you will know that all of them |
524 | If you are familiar with some event loops you will know that all of them |
482 | require you to run some blocking "loop", "run" or similar function that |
525 | require you to run some blocking "loop", "run" or similar function that |
483 | will actively watch for new events and call your callbacks. |
526 | will actively watch for new events and call your callbacks. |
484 | |
527 | |
485 | AnyEvent is slightly different: it expects somebody else to run the event |
528 | AnyEvent is slightly different: it expects somebody else to run the event |
… | |
… | |
504 | Condition variables are similar to callbacks, except that you can |
547 | Condition variables are similar to callbacks, except that you can |
505 | optionally wait for them. They can also be called merge points - points |
548 | optionally wait for them. They can also be called merge points - points |
506 | in time where multiple outstanding events have been processed. And yet |
549 | in time where multiple outstanding events have been processed. And yet |
507 | another way to call them is transactions - each condition variable can be |
550 | another way to call them is transactions - each condition variable can be |
508 | used to represent a transaction, which finishes at some point and delivers |
551 | used to represent a transaction, which finishes at some point and delivers |
509 | a result. |
552 | a result. And yet some people know them as "futures" - a promise to |
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553 | compute/deliver something that you can wait for. |
510 | |
554 | |
511 | Condition variables are very useful to signal that something has finished, |
555 | Condition variables are very useful to signal that something has finished, |
512 | for example, if you write a module that does asynchronous http requests, |
556 | for example, if you write a module that does asynchronous http requests, |
513 | then a condition variable would be the ideal candidate to signal the |
557 | then a condition variable would be the ideal candidate to signal the |
514 | availability of results. The user can either act when the callback is |
558 | availability of results. The user can either act when the callback is |
… | |
… | |
746 | =item $cb = $cv->cb ($cb->($cv)) |
790 | =item $cb = $cv->cb ($cb->($cv)) |
747 | |
791 | |
748 | This is a mutator function that returns the callback set and optionally |
792 | This is a mutator function that returns the callback set and optionally |
749 | replaces it before doing so. |
793 | replaces it before doing so. |
750 | |
794 | |
751 | The callback will be called when the condition becomes "true", i.e. when |
795 | The callback will be called when the condition becomes (or already was) |
752 | C<send> or C<croak> are called, with the only argument being the condition |
796 | "true", i.e. when C<send> or C<croak> are called (or were called), with |
753 | variable itself. Calling C<recv> inside the callback or at any later time |
797 | the only argument being the condition variable itself. Calling C<recv> |
754 | is guaranteed not to block. |
798 | inside the callback or at any later time is guaranteed not to block. |
755 | |
799 | |
756 | =back |
800 | =back |
757 | |
801 | |
758 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
802 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
759 | |
803 | |
… | |
… | |
762 | =over 4 |
806 | =over 4 |
763 | |
807 | |
764 | =item Backends that are autoprobed when no other event loop can be found. |
808 | =item Backends that are autoprobed when no other event loop can be found. |
765 | |
809 | |
766 | EV is the preferred backend when no other event loop seems to be in |
810 | EV is the preferred backend when no other event loop seems to be in |
767 | use. If EV is not installed, then AnyEvent will try Event, and, failing |
811 | use. If EV is not installed, then AnyEvent will fall back to its own |
768 | that, will fall back to its own pure-perl implementation, which is |
812 | pure-perl implementation, which is available everywhere as it comes with |
769 | available everywhere as it comes with AnyEvent itself. |
813 | AnyEvent itself. |
770 | |
814 | |
771 | AnyEvent::Impl::EV based on EV (interface to libev, best choice). |
815 | AnyEvent::Impl::EV based on EV (interface to libev, best choice). |
772 | AnyEvent::Impl::Event based on Event, very stable, few glitches. |
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|
773 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
816 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
774 | |
817 | |
775 | =item Backends that are transparently being picked up when they are used. |
818 | =item Backends that are transparently being picked up when they are used. |
776 | |
819 | |
777 | These will be used when they are currently loaded when the first watcher |
820 | These will be used when they are currently loaded when the first watcher |
778 | is created, in which case it is assumed that the application is using |
821 | is created, in which case it is assumed that the application is using |
779 | them. This means that AnyEvent will automatically pick the right backend |
822 | them. This means that AnyEvent will automatically pick the right backend |
780 | when the main program loads an event module before anything starts to |
823 | when the main program loads an event module before anything starts to |
781 | create watchers. Nothing special needs to be done by the main program. |
824 | create watchers. Nothing special needs to be done by the main program. |
782 | |
825 | |
|
|
826 | AnyEvent::Impl::Event based on Event, very stable, few glitches. |
783 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
827 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
784 | AnyEvent::Impl::Tk based on Tk, very broken. |
828 | AnyEvent::Impl::Tk based on Tk, very broken. |
785 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
829 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
786 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
830 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
|
|
831 | AnyEvent::Impl::Irssi used when running within irssi. |
787 | |
832 | |
788 | =item Backends with special needs. |
833 | =item Backends with special needs. |
789 | |
834 | |
790 | Qt requires the Qt::Application to be instantiated first, but will |
835 | Qt requires the Qt::Application to be instantiated first, but will |
791 | otherwise be picked up automatically. As long as the main program |
836 | otherwise be picked up automatically. As long as the main program |
… | |
… | |
865 | event module detection too early, for example, L<AnyEvent::AIO> creates |
910 | event module detection too early, for example, L<AnyEvent::AIO> creates |
866 | and installs the global L<IO::AIO> watcher in a C<post_detect> block to |
911 | and installs the global L<IO::AIO> watcher in a C<post_detect> block to |
867 | avoid autodetecting the event module at load time. |
912 | avoid autodetecting the event module at load time. |
868 | |
913 | |
869 | If called in scalar or list context, then it creates and returns an object |
914 | If called in scalar or list context, then it creates and returns an object |
870 | that automatically removes the callback again when it is destroyed. See |
915 | that automatically removes the callback again when it is destroyed (or |
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916 | C<undef> when the hook was immediately executed). See L<AnyEvent::AIO> for |
871 | L<Coro::BDB> for a case where this is useful. |
917 | a case where this is useful. |
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|
918 | |
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|
919 | Example: Create a watcher for the IO::AIO module and store it in |
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|
920 | C<$WATCHER>. Only do so after the event loop is initialised, though. |
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|
921 | |
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|
922 | our WATCHER; |
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|
923 | |
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|
924 | my $guard = AnyEvent::post_detect { |
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|
925 | $WATCHER = AnyEvent->io (fh => IO::AIO::poll_fileno, poll => 'r', cb => \&IO::AIO::poll_cb); |
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|
926 | }; |
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|
927 | |
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|
928 | # the ||= is important in case post_detect immediately runs the block, |
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|
929 | # as to not clobber the newly-created watcher. assigning both watcher and |
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|
930 | # post_detect guard to the same variable has the advantage of users being |
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931 | # able to just C<undef $WATCHER> if the watcher causes them grief. |
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932 | |
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|
933 | $WATCHER ||= $guard; |
872 | |
934 | |
873 | =item @AnyEvent::post_detect |
935 | =item @AnyEvent::post_detect |
874 | |
936 | |
875 | If there are any code references in this array (you can C<push> to it |
937 | If there are any code references in this array (you can C<push> to it |
876 | before or after loading AnyEvent), then they will called directly after |
938 | before or after loading AnyEvent), then they will called directly after |
… | |
… | |
1053 | |
1115 | |
1054 | BEGIN { AnyEvent::common_sense } |
1116 | BEGIN { AnyEvent::common_sense } |
1055 | |
1117 | |
1056 | use Carp (); |
1118 | use Carp (); |
1057 | |
1119 | |
1058 | our $VERSION = 4.83; |
1120 | our $VERSION = '5.0'; |
1059 | our $MODEL; |
1121 | our $MODEL; |
1060 | |
1122 | |
1061 | our $AUTOLOAD; |
1123 | our $AUTOLOAD; |
1062 | our @ISA; |
1124 | our @ISA; |
1063 | |
1125 | |
… | |
… | |
1088 | for reverse split /\s*,\s*/, |
1150 | for reverse split /\s*,\s*/, |
1089 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1151 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1090 | } |
1152 | } |
1091 | |
1153 | |
1092 | my @models = ( |
1154 | my @models = ( |
1093 | [EV:: => AnyEvent::Impl::EV::], |
1155 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1094 | [Event:: => AnyEvent::Impl::Event::], |
|
|
1095 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::], |
1156 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], |
1096 | # everything below here will not be autoprobed |
1157 | # everything below here will not (normally) be autoprobed |
1097 | # as the pureperl backend should work everywhere |
1158 | # as the pureperl backend should work everywhere |
1098 | # and is usually faster |
1159 | # and is usually faster |
|
|
1160 | [Event:: => AnyEvent::Impl::Event::, 1], |
1099 | [Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers |
1161 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1100 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1162 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
|
|
1163 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
1101 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1164 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1102 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1165 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1103 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1166 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1104 | [Wx:: => AnyEvent::Impl::POE::], |
1167 | [Wx:: => AnyEvent::Impl::POE::], |
1105 | [Prima:: => AnyEvent::Impl::POE::], |
1168 | [Prima:: => AnyEvent::Impl::POE::], |
1106 | # IO::Async is just too broken - we would need workarounds for its |
1169 | # IO::Async is just too broken - we would need workarounds for its |
1107 | # byzantine signal and broken child handling, among others. |
1170 | # byzantine signal and broken child handling, among others. |
1108 | # IO::Async is rather hard to detect, as it doesn't have any |
1171 | # IO::Async is rather hard to detect, as it doesn't have any |
1109 | # obvious default class. |
1172 | # obvious default class. |
1110 | # [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1173 | [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1111 | # [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1174 | [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1112 | # [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1175 | [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
|
|
1176 | [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1113 | ); |
1177 | ); |
1114 | |
1178 | |
1115 | our %method = map +($_ => 1), |
1179 | our %method = map +($_ => 1), |
1116 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1180 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1117 | |
1181 | |
… | |
… | |
1121 | my ($cb) = @_; |
1185 | my ($cb) = @_; |
1122 | |
1186 | |
1123 | if ($MODEL) { |
1187 | if ($MODEL) { |
1124 | $cb->(); |
1188 | $cb->(); |
1125 | |
1189 | |
1126 | 1 |
1190 | undef |
1127 | } else { |
1191 | } else { |
1128 | push @post_detect, $cb; |
1192 | push @post_detect, $cb; |
1129 | |
1193 | |
1130 | defined wantarray |
1194 | defined wantarray |
1131 | ? bless \$cb, "AnyEvent::Util::postdetect" |
1195 | ? bless \$cb, "AnyEvent::Util::postdetect" |
… | |
… | |
1163 | } |
1227 | } |
1164 | } |
1228 | } |
1165 | } |
1229 | } |
1166 | |
1230 | |
1167 | unless ($MODEL) { |
1231 | unless ($MODEL) { |
1168 | # try to load a model |
1232 | # try to autoload a model |
1169 | |
|
|
1170 | for (@REGISTRY, @models) { |
1233 | for (@REGISTRY, @models) { |
1171 | my ($package, $model) = @$_; |
1234 | my ($package, $model, $autoload) = @$_; |
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|
1235 | if ( |
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|
1236 | $autoload |
1172 | if (eval "require $package" |
1237 | and eval "require $package" |
1173 | and ${"$package\::VERSION"} > 0 |
1238 | and ${"$package\::VERSION"} > 0 |
1174 | and eval "require $model") { |
1239 | and eval "require $model" |
|
|
1240 | ) { |
1175 | $MODEL = $model; |
1241 | $MODEL = $model; |
1176 | warn "AnyEvent: autoprobed model '$model', using it.\n" if $VERBOSE >= 2; |
1242 | warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2; |
1177 | last; |
1243 | last; |
1178 | } |
1244 | } |
1179 | } |
1245 | } |
1180 | |
1246 | |
1181 | $MODEL |
1247 | $MODEL |
… | |
… | |
1220 | or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,"; |
1286 | or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,"; |
1221 | |
1287 | |
1222 | # we assume CLOEXEC is already set by perl in all important cases |
1288 | # we assume CLOEXEC is already set by perl in all important cases |
1223 | |
1289 | |
1224 | ($fh2, $rw) |
1290 | ($fh2, $rw) |
|
|
1291 | } |
|
|
1292 | |
|
|
1293 | =head1 SIMPLIFIED AE API |
|
|
1294 | |
|
|
1295 | Starting with version 5.0, AnyEvent officially supports a second, much |
|
|
1296 | simpler, API that is designed to reduce the calling, typing and memory |
|
|
1297 | overhead. |
|
|
1298 | |
|
|
1299 | See the L<AE> manpage for details. |
|
|
1300 | |
|
|
1301 | =cut |
|
|
1302 | |
|
|
1303 | package AE; |
|
|
1304 | |
|
|
1305 | our $VERSION = $AnyEvent::VERSION; |
|
|
1306 | |
|
|
1307 | sub io($$$) { |
|
|
1308 | AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) |
|
|
1309 | } |
|
|
1310 | |
|
|
1311 | sub timer($$$) { |
|
|
1312 | AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]) |
|
|
1313 | } |
|
|
1314 | |
|
|
1315 | sub signal($$) { |
|
|
1316 | AnyEvent->signal (signal => $_[0], cb => $_[1]) |
|
|
1317 | } |
|
|
1318 | |
|
|
1319 | sub child($$) { |
|
|
1320 | AnyEvent->child (pid => $_[0], cb => $_[1]) |
|
|
1321 | } |
|
|
1322 | |
|
|
1323 | sub idle($) { |
|
|
1324 | AnyEvent->idle (cb => $_[0]) |
|
|
1325 | } |
|
|
1326 | |
|
|
1327 | sub cv(;&) { |
|
|
1328 | AnyEvent->condvar (@_ ? (cb => $_[0]) : ()) |
|
|
1329 | } |
|
|
1330 | |
|
|
1331 | sub now() { |
|
|
1332 | AnyEvent->now |
|
|
1333 | } |
|
|
1334 | |
|
|
1335 | sub now_update() { |
|
|
1336 | AnyEvent->now_update |
|
|
1337 | } |
|
|
1338 | |
|
|
1339 | sub time() { |
|
|
1340 | AnyEvent->time |
1225 | } |
1341 | } |
1226 | |
1342 | |
1227 | package AnyEvent::Base; |
1343 | package AnyEvent::Base; |
1228 | |
1344 | |
1229 | # default implementations for many methods |
1345 | # default implementations for many methods |
… | |
… | |
1253 | } |
1369 | } |
1254 | |
1370 | |
1255 | # default implementation for ->signal |
1371 | # default implementation for ->signal |
1256 | |
1372 | |
1257 | our $HAVE_ASYNC_INTERRUPT; |
1373 | our $HAVE_ASYNC_INTERRUPT; |
|
|
1374 | |
|
|
1375 | sub _have_async_interrupt() { |
|
|
1376 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
|
|
1377 | && eval "use Async::Interrupt 1.0 (); 1") |
|
|
1378 | unless defined $HAVE_ASYNC_INTERRUPT; |
|
|
1379 | |
|
|
1380 | $HAVE_ASYNC_INTERRUPT |
|
|
1381 | } |
|
|
1382 | |
1258 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1383 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1259 | our (%SIG_ASY, %SIG_ASY_W); |
1384 | our (%SIG_ASY, %SIG_ASY_W); |
1260 | our ($SIG_COUNT, $SIG_TW); |
1385 | our ($SIG_COUNT, $SIG_TW); |
1261 | |
1386 | |
1262 | sub _signal_exec { |
1387 | sub _signal_exec { |
… | |
… | |
1270 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1395 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1271 | } |
1396 | } |
1272 | } |
1397 | } |
1273 | } |
1398 | } |
1274 | |
1399 | |
|
|
1400 | # install a dummy wakeup watcher to reduce signal catching latency |
1275 | sub _signal { |
1401 | sub _sig_add() { |
1276 | my (undef, %arg) = @_; |
1402 | unless ($SIG_COUNT++) { |
|
|
1403 | # try to align timer on a full-second boundary, if possible |
|
|
1404 | my $NOW = AE::now; |
1277 | |
1405 | |
1278 | my $signal = uc $arg{signal} |
1406 | $SIG_TW = AE::timer |
1279 | or Carp::croak "required option 'signal' is missing"; |
1407 | $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1280 | |
1408 | $MAX_SIGNAL_LATENCY, |
1281 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
1409 | sub { } # just for the PERL_ASYNC_CHECK |
1282 | |
|
|
1283 | if ($HAVE_ASYNC_INTERRUPT) { |
|
|
1284 | # async::interrupt |
|
|
1285 | |
|
|
1286 | $SIG_ASY{$signal} ||= do { |
|
|
1287 | my $asy = new Async::Interrupt |
|
|
1288 | cb => sub { undef $SIG_EV{$signal} }, |
|
|
1289 | signal => $signal, |
|
|
1290 | pipe => [$SIGPIPE_R->filenos], |
|
|
1291 | ; |
|
|
1292 | $asy->pipe_autodrain (0); |
|
|
1293 | |
|
|
1294 | $asy |
|
|
1295 | }; |
1410 | ; |
1296 | |
|
|
1297 | } else { |
|
|
1298 | # pure perl |
|
|
1299 | |
|
|
1300 | $SIG{$signal} ||= sub { |
|
|
1301 | local $!; |
|
|
1302 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
|
|
1303 | undef $SIG_EV{$signal}; |
|
|
1304 | }; |
|
|
1305 | |
|
|
1306 | # can't do signal processing without introducing races in pure perl, |
|
|
1307 | # so limit the signal latency. |
|
|
1308 | ++$SIG_COUNT; |
|
|
1309 | $SIG_TW ||= AnyEvent->timer ( |
|
|
1310 | after => $MAX_SIGNAL_LATENCY, |
|
|
1311 | interval => $MAX_SIGNAL_LATENCY, |
|
|
1312 | cb => sub { }, # just for the PERL_ASYNC_CHECK |
|
|
1313 | ); |
|
|
1314 | } |
1411 | } |
1315 | |
|
|
1316 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
|
|
1317 | } |
1412 | } |
1318 | |
1413 | |
1319 | sub signal { |
1414 | sub _sig_del { |
1320 | # probe for availability of Async::Interrupt |
|
|
1321 | if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") { |
|
|
1322 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1323 | |
|
|
1324 | $HAVE_ASYNC_INTERRUPT = 1; |
|
|
1325 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1326 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec); |
|
|
1327 | |
|
|
1328 | } else { |
|
|
1329 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1330 | |
|
|
1331 | require Fcntl; |
|
|
1332 | |
|
|
1333 | if (AnyEvent::WIN32) { |
|
|
1334 | require AnyEvent::Util; |
|
|
1335 | |
|
|
1336 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1337 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R; |
|
|
1338 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case |
|
|
1339 | } else { |
|
|
1340 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1341 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1342 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1343 | |
|
|
1344 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1345 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1346 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1347 | } |
|
|
1348 | |
|
|
1349 | $SIGPIPE_R |
|
|
1350 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1351 | |
|
|
1352 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec); |
|
|
1353 | } |
|
|
1354 | |
|
|
1355 | *signal = \&_signal; |
|
|
1356 | &signal |
|
|
1357 | } |
|
|
1358 | |
|
|
1359 | sub AnyEvent::Base::signal::DESTROY { |
|
|
1360 | my ($signal, $cb) = @{$_[0]}; |
|
|
1361 | |
|
|
1362 | undef $SIG_TW |
1415 | undef $SIG_TW |
1363 | unless --$SIG_COUNT; |
1416 | unless --$SIG_COUNT; |
|
|
1417 | } |
1364 | |
1418 | |
|
|
1419 | our $_sig_name_init; $_sig_name_init = sub { |
|
|
1420 | eval q{ # poor man's autoloading |
|
|
1421 | undef $_sig_name_init; |
|
|
1422 | |
|
|
1423 | if (_have_async_interrupt) { |
|
|
1424 | *sig2num = \&Async::Interrupt::sig2num; |
|
|
1425 | *sig2name = \&Async::Interrupt::sig2name; |
|
|
1426 | } else { |
|
|
1427 | require Config; |
|
|
1428 | |
|
|
1429 | my %signame2num; |
|
|
1430 | @signame2num{ split ' ', $Config::Config{sig_name} } |
|
|
1431 | = split ' ', $Config::Config{sig_num}; |
|
|
1432 | |
|
|
1433 | my @signum2name; |
|
|
1434 | @signum2name[values %signame2num] = keys %signame2num; |
|
|
1435 | |
|
|
1436 | *sig2num = sub($) { |
|
|
1437 | $_[0] > 0 ? shift : $signame2num{+shift} |
|
|
1438 | }; |
|
|
1439 | *sig2name = sub ($) { |
|
|
1440 | $_[0] > 0 ? $signum2name[+shift] : shift |
|
|
1441 | }; |
|
|
1442 | } |
|
|
1443 | }; |
|
|
1444 | die if $@; |
|
|
1445 | }; |
|
|
1446 | |
|
|
1447 | sub sig2num ($) { &$_sig_name_init; &sig2num } |
|
|
1448 | sub sig2name($) { &$_sig_name_init; &sig2name } |
|
|
1449 | |
|
|
1450 | sub signal { |
|
|
1451 | eval q{ # poor man's autoloading {} |
|
|
1452 | # probe for availability of Async::Interrupt |
|
|
1453 | if (_have_async_interrupt) { |
|
|
1454 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1455 | |
|
|
1456 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1457 | $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; |
|
|
1458 | |
|
|
1459 | } else { |
|
|
1460 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1461 | |
|
|
1462 | require Fcntl; |
|
|
1463 | |
|
|
1464 | if (AnyEvent::WIN32) { |
|
|
1465 | require AnyEvent::Util; |
|
|
1466 | |
|
|
1467 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1468 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R; |
|
|
1469 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case |
|
|
1470 | } else { |
|
|
1471 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1472 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1473 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1474 | |
|
|
1475 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1476 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1477 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1478 | } |
|
|
1479 | |
|
|
1480 | $SIGPIPE_R |
|
|
1481 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1482 | |
|
|
1483 | $SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec; |
|
|
1484 | } |
|
|
1485 | |
|
|
1486 | *signal = sub { |
|
|
1487 | my (undef, %arg) = @_; |
|
|
1488 | |
|
|
1489 | my $signal = uc $arg{signal} |
|
|
1490 | or Carp::croak "required option 'signal' is missing"; |
|
|
1491 | |
|
|
1492 | if ($HAVE_ASYNC_INTERRUPT) { |
|
|
1493 | # async::interrupt |
|
|
1494 | |
|
|
1495 | $signal = sig2num $signal; |
|
|
1496 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1497 | |
|
|
1498 | $SIG_ASY{$signal} ||= new Async::Interrupt |
|
|
1499 | cb => sub { undef $SIG_EV{$signal} }, |
|
|
1500 | signal => $signal, |
|
|
1501 | pipe => [$SIGPIPE_R->filenos], |
|
|
1502 | pipe_autodrain => 0, |
|
|
1503 | ; |
|
|
1504 | |
|
|
1505 | } else { |
|
|
1506 | # pure perl |
|
|
1507 | |
|
|
1508 | # AE::Util has been loaded in signal |
|
|
1509 | $signal = sig2name $signal; |
|
|
1510 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1511 | |
|
|
1512 | $SIG{$signal} ||= sub { |
|
|
1513 | local $!; |
|
|
1514 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
|
|
1515 | undef $SIG_EV{$signal}; |
|
|
1516 | }; |
|
|
1517 | |
|
|
1518 | # can't do signal processing without introducing races in pure perl, |
|
|
1519 | # so limit the signal latency. |
|
|
1520 | _sig_add; |
|
|
1521 | } |
|
|
1522 | |
|
|
1523 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
|
|
1524 | }; |
|
|
1525 | |
|
|
1526 | *AnyEvent::Base::signal::DESTROY = sub { |
|
|
1527 | my ($signal, $cb) = @{$_[0]}; |
|
|
1528 | |
|
|
1529 | _sig_del; |
|
|
1530 | |
1365 | delete $SIG_CB{$signal}{$cb}; |
1531 | delete $SIG_CB{$signal}{$cb}; |
1366 | |
1532 | |
|
|
1533 | $HAVE_ASYNC_INTERRUPT |
|
|
1534 | ? delete $SIG_ASY{$signal} |
1367 | # delete doesn't work with older perls - they then |
1535 | : # delete doesn't work with older perls - they then |
1368 | # print weird messages, or just unconditionally exit |
1536 | # print weird messages, or just unconditionally exit |
1369 | # instead of getting the default action. |
1537 | # instead of getting the default action. |
1370 | undef $SIG{$signal} |
1538 | undef $SIG{$signal} |
1371 | unless keys %{ $SIG_CB{$signal} }; |
1539 | unless keys %{ $SIG_CB{$signal} }; |
|
|
1540 | }; |
|
|
1541 | }; |
|
|
1542 | die if $@; |
|
|
1543 | &signal |
1372 | } |
1544 | } |
1373 | |
1545 | |
1374 | # default implementation for ->child |
1546 | # default implementation for ->child |
1375 | |
1547 | |
1376 | our %PID_CB; |
1548 | our %PID_CB; |
1377 | our $CHLD_W; |
1549 | our $CHLD_W; |
1378 | our $CHLD_DELAY_W; |
1550 | our $CHLD_DELAY_W; |
1379 | our $WNOHANG; |
1551 | our $WNOHANG; |
1380 | |
1552 | |
|
|
1553 | sub _emit_childstatus($$) { |
|
|
1554 | my (undef, $rpid, $rstatus) = @_; |
|
|
1555 | |
|
|
1556 | $_->($rpid, $rstatus) |
|
|
1557 | for values %{ $PID_CB{$rpid} || {} }, |
|
|
1558 | values %{ $PID_CB{0} || {} }; |
|
|
1559 | } |
|
|
1560 | |
1381 | sub _sigchld { |
1561 | sub _sigchld { |
|
|
1562 | my $pid; |
|
|
1563 | |
|
|
1564 | AnyEvent->_emit_childstatus ($pid, $?) |
1382 | while (0 < (my $pid = waitpid -1, $WNOHANG)) { |
1565 | while ($pid = waitpid -1, $WNOHANG) > 0; |
1383 | $_->($pid, $?) |
|
|
1384 | for values %{ $PID_CB{$pid} || {} }, |
|
|
1385 | values %{ $PID_CB{0} || {} }; |
|
|
1386 | } |
|
|
1387 | } |
1566 | } |
1388 | |
1567 | |
1389 | sub child { |
1568 | sub child { |
1390 | my (undef, %arg) = @_; |
1569 | my (undef, %arg) = @_; |
1391 | |
1570 | |
… | |
… | |
1398 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1577 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1399 | ? 1 |
1578 | ? 1 |
1400 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1579 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1401 | |
1580 | |
1402 | unless ($CHLD_W) { |
1581 | unless ($CHLD_W) { |
1403 | $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld); |
1582 | $CHLD_W = AE::signal CHLD => \&_sigchld; |
1404 | # child could be a zombie already, so make at least one round |
1583 | # child could be a zombie already, so make at least one round |
1405 | &_sigchld; |
1584 | &_sigchld; |
1406 | } |
1585 | } |
1407 | |
1586 | |
1408 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
1587 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
… | |
… | |
1434 | # never use more then 50% of the time for the idle watcher, |
1613 | # never use more then 50% of the time for the idle watcher, |
1435 | # within some limits |
1614 | # within some limits |
1436 | $w = 0.0001 if $w < 0.0001; |
1615 | $w = 0.0001 if $w < 0.0001; |
1437 | $w = 5 if $w > 5; |
1616 | $w = 5 if $w > 5; |
1438 | |
1617 | |
1439 | $w = AnyEvent->timer (after => $w, cb => $rcb); |
1618 | $w = AE::timer $w, 0, $rcb; |
1440 | } else { |
1619 | } else { |
1441 | # clean up... |
1620 | # clean up... |
1442 | undef $w; |
1621 | undef $w; |
1443 | undef $rcb; |
1622 | undef $rcb; |
1444 | } |
1623 | } |
1445 | }; |
1624 | }; |
1446 | |
1625 | |
1447 | $w = AnyEvent->timer (after => 0.05, cb => $rcb); |
1626 | $w = AE::timer 0.05, 0, $rcb; |
1448 | |
1627 | |
1449 | bless \\$cb, "AnyEvent::Base::idle" |
1628 | bless \\$cb, "AnyEvent::Base::idle" |
1450 | } |
1629 | } |
1451 | |
1630 | |
1452 | sub AnyEvent::Base::idle::DESTROY { |
1631 | sub AnyEvent::Base::idle::DESTROY { |
… | |
… | |
1506 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1685 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1507 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1686 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1508 | } |
1687 | } |
1509 | |
1688 | |
1510 | sub cb { |
1689 | sub cb { |
1511 | $_[0]{_ae_cb} = $_[1] if @_ > 1; |
1690 | my $cv = shift; |
|
|
1691 | |
|
|
1692 | @_ |
|
|
1693 | and $cv->{_ae_cb} = shift |
|
|
1694 | and $cv->{_ae_sent} |
|
|
1695 | and (delete $cv->{_ae_cb})->($cv); |
|
|
1696 | |
1512 | $_[0]{_ae_cb} |
1697 | $cv->{_ae_cb} |
1513 | } |
1698 | } |
1514 | |
1699 | |
1515 | sub begin { |
1700 | sub begin { |
1516 | ++$_[0]{_ae_counter}; |
1701 | ++$_[0]{_ae_counter}; |
1517 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
1702 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
… | |
… | |
1876 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
2061 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
1877 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
2062 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
1878 | which it is), lets them fire exactly once and destroys them again. |
2063 | which it is), lets them fire exactly once and destroys them again. |
1879 | |
2064 | |
1880 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
2065 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
1881 | distribution. |
2066 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2067 | for the EV and Perl backends only. |
1882 | |
2068 | |
1883 | =head3 Explanation of the columns |
2069 | =head3 Explanation of the columns |
1884 | |
2070 | |
1885 | I<watcher> is the number of event watchers created/destroyed. Since |
2071 | I<watcher> is the number of event watchers created/destroyed. Since |
1886 | different event models feature vastly different performances, each event |
2072 | different event models feature vastly different performances, each event |
… | |
… | |
1907 | watcher. |
2093 | watcher. |
1908 | |
2094 | |
1909 | =head3 Results |
2095 | =head3 Results |
1910 | |
2096 | |
1911 | name watchers bytes create invoke destroy comment |
2097 | name watchers bytes create invoke destroy comment |
1912 | EV/EV 400000 224 0.47 0.35 0.27 EV native interface |
2098 | EV/EV 100000 223 0.47 0.43 0.27 EV native interface |
1913 | EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers |
2099 | EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers |
1914 | CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal |
2100 | Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal |
1915 | Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation |
2101 | Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation |
1916 | Event/Event 16000 517 32.20 31.80 0.81 Event native interface |
2102 | Event/Event 16000 516 31.16 31.84 0.82 Event native interface |
1917 | Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers |
2103 | Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers |
1918 | IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll |
2104 | IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll |
1919 | IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll |
2105 | IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll |
1920 | Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour |
2106 | Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour |
1921 | Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers |
2107 | Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers |
1922 | POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event |
2108 | POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event |
1923 | POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select |
2109 | POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select |
1924 | |
2110 | |
1925 | =head3 Discussion |
2111 | =head3 Discussion |
1926 | |
2112 | |
1927 | The benchmark does I<not> measure scalability of the event loop very |
2113 | The benchmark does I<not> measure scalability of the event loop very |
1928 | well. For example, a select-based event loop (such as the pure perl one) |
2114 | well. For example, a select-based event loop (such as the pure perl one) |
… | |
… | |
1940 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
2126 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
1941 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
2127 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
1942 | cycles with POE. |
2128 | cycles with POE. |
1943 | |
2129 | |
1944 | C<EV> is the sole leader regarding speed and memory use, which are both |
2130 | C<EV> is the sole leader regarding speed and memory use, which are both |
1945 | maximal/minimal, respectively. Even when going through AnyEvent, it uses |
2131 | maximal/minimal, respectively. When using the L<AE> API there is zero |
|
|
2132 | overhead (when going through the AnyEvent API create is about 5-6 times |
|
|
2133 | slower, with other times being equal, so still uses far less memory than |
1946 | far less memory than any other event loop and is still faster than Event |
2134 | any other event loop and is still faster than Event natively). |
1947 | natively. |
|
|
1948 | |
2135 | |
1949 | The pure perl implementation is hit in a few sweet spots (both the |
2136 | The pure perl implementation is hit in a few sweet spots (both the |
1950 | constant timeout and the use of a single fd hit optimisations in the perl |
2137 | constant timeout and the use of a single fd hit optimisations in the perl |
1951 | interpreter and the backend itself). Nevertheless this shows that it |
2138 | interpreter and the backend itself). Nevertheless this shows that it |
1952 | adds very little overhead in itself. Like any select-based backend its |
2139 | adds very little overhead in itself. Like any select-based backend its |
… | |
… | |
2026 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2213 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2027 | (1%) are active. This mirrors the activity of large servers with many |
2214 | (1%) are active. This mirrors the activity of large servers with many |
2028 | connections, most of which are idle at any one point in time. |
2215 | connections, most of which are idle at any one point in time. |
2029 | |
2216 | |
2030 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2217 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2031 | distribution. |
2218 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2219 | for the EV and Perl backends only. |
2032 | |
2220 | |
2033 | =head3 Explanation of the columns |
2221 | =head3 Explanation of the columns |
2034 | |
2222 | |
2035 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2223 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2036 | each server has a read and write socket end). |
2224 | each server has a read and write socket end). |
… | |
… | |
2044 | a new one that moves the timeout into the future. |
2232 | a new one that moves the timeout into the future. |
2045 | |
2233 | |
2046 | =head3 Results |
2234 | =head3 Results |
2047 | |
2235 | |
2048 | name sockets create request |
2236 | name sockets create request |
2049 | EV 20000 69.01 11.16 |
2237 | EV 20000 62.66 7.99 |
2050 | Perl 20000 73.32 35.87 |
2238 | Perl 20000 68.32 32.64 |
2051 | IOAsync 20000 157.00 98.14 epoll |
2239 | IOAsync 20000 174.06 101.15 epoll |
2052 | IOAsync 20000 159.31 616.06 poll |
2240 | IOAsync 20000 174.67 610.84 poll |
2053 | Event 20000 212.62 257.32 |
2241 | Event 20000 202.69 242.91 |
2054 | Glib 20000 651.16 1896.30 |
2242 | Glib 20000 557.01 1689.52 |
2055 | POE 20000 349.67 12317.24 uses POE::Loop::Event |
2243 | POE 20000 341.54 12086.32 uses POE::Loop::Event |
2056 | |
2244 | |
2057 | =head3 Discussion |
2245 | =head3 Discussion |
2058 | |
2246 | |
2059 | This benchmark I<does> measure scalability and overall performance of the |
2247 | This benchmark I<does> measure scalability and overall performance of the |
2060 | particular event loop. |
2248 | particular event loop. |
… | |
… | |
2255 | |
2443 | |
2256 | This slightly arcane module is used to implement fast signal handling: To |
2444 | This slightly arcane module is used to implement fast signal handling: To |
2257 | my knowledge, there is no way to do completely race-free and quick |
2445 | my knowledge, there is no way to do completely race-free and quick |
2258 | signal handling in pure perl. To ensure that signals still get |
2446 | signal handling in pure perl. To ensure that signals still get |
2259 | delivered, AnyEvent will start an interval timer to wake up perl (and |
2447 | delivered, AnyEvent will start an interval timer to wake up perl (and |
2260 | catch the signals) with soemd elay (default is 10 seconds, look for |
2448 | catch the signals) with some delay (default is 10 seconds, look for |
2261 | C<$AnyEvent::MAX_SIGNAL_LATENCY>). |
2449 | C<$AnyEvent::MAX_SIGNAL_LATENCY>). |
2262 | |
2450 | |
2263 | If this module is available, then it will be used to implement signal |
2451 | If this module is available, then it will be used to implement signal |
2264 | catching, which means that signals will not be delayed, and the event loop |
2452 | catching, which means that signals will not be delayed, and the event loop |
2265 | will not be interrupted regularly, which is more efficient (And good for |
2453 | will not be interrupted regularly, which is more efficient (And good for |
2266 | battery life on laptops). |
2454 | battery life on laptops). |
2267 | |
2455 | |
2268 | This affects not just the pure-perl event loop, but also other event loops |
2456 | This affects not just the pure-perl event loop, but also other event loops |
2269 | that have no signal handling on their own (e.g. Glib, Tk, Qt). |
2457 | that have no signal handling on their own (e.g. Glib, Tk, Qt). |
|
|
2458 | |
|
|
2459 | Some event loops (POE, Event, Event::Lib) offer signal watchers natively, |
|
|
2460 | and either employ their own workarounds (POE) or use AnyEvent's workaround |
|
|
2461 | (using C<$AnyEvent::MAX_SIGNAL_LATENCY>). Installing L<Async::Interrupt> |
|
|
2462 | does nothing for those backends. |
2270 | |
2463 | |
2271 | =item L<EV> |
2464 | =item L<EV> |
2272 | |
2465 | |
2273 | This module isn't really "optional", as it is simply one of the backend |
2466 | This module isn't really "optional", as it is simply one of the backend |
2274 | event loops that AnyEvent can use. However, it is simply the best event |
2467 | event loops that AnyEvent can use. However, it is simply the best event |
… | |
… | |
2288 | |
2481 | |
2289 | =item L<JSON> and L<JSON::XS> |
2482 | =item L<JSON> and L<JSON::XS> |
2290 | |
2483 | |
2291 | This module is required when you want to read or write JSON data via |
2484 | This module is required when you want to read or write JSON data via |
2292 | L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2485 | L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2293 | advantage of the ulta-high-speed L<JSON::XS> module when it is installed. |
2486 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2294 | |
2487 | |
2295 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2488 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2296 | installed. |
2489 | installed. |
2297 | |
2490 | |
2298 | =item L<Net::SSLeay> |
2491 | =item L<Net::SSLeay> |
… | |
… | |
2365 | L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
2558 | L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
2366 | |
2559 | |
2367 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
2560 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
2368 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
2561 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
2369 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
2562 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
2370 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>. |
2563 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. |
2371 | |
2564 | |
2372 | Non-blocking file handles, sockets, TCP clients and |
2565 | Non-blocking file handles, sockets, TCP clients and |
2373 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
2566 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
2374 | |
2567 | |
2375 | Asynchronous DNS: L<AnyEvent::DNS>. |
2568 | Asynchronous DNS: L<AnyEvent::DNS>. |