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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341 | might affect timers and time-outs. |
363 | might affect timers and time-outs. |
342 | |
364 | |
343 | When this is the case, you can call this method, which will update the |
365 | When this is the case, you can call this method, which will update the |
344 | event loop's idea of "current time". |
366 | event loop's idea of "current time". |
345 | |
367 | |
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368 | A typical example would be a script in a web server (e.g. C<mod_perl>) - |
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369 | when mod_perl executes the script, then the event loop will have the wrong |
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370 | idea about the "current time" (being potentially far in the past, when the |
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371 | script ran the last time). In that case you should arrange a call to C<< |
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372 | AnyEvent->now_update >> each time the web server process wakes up again |
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373 | (e.g. at the start of your script, or in a handler). |
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374 | |
346 | Note that updating the time I<might> cause some events to be handled. |
375 | Note that updating the time I<might> cause some events to be handled. |
347 | |
376 | |
348 | =back |
377 | =back |
349 | |
378 | |
350 | =head2 SIGNAL WATCHERS |
379 | =head2 SIGNAL WATCHERS |
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380 | |
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381 | $w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>); |
351 | |
382 | |
352 | You can watch for signals using a signal watcher, C<signal> is the signal |
383 | 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 |
384 | I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl |
354 | callback to be invoked whenever a signal occurs. |
385 | callback to be invoked whenever a signal occurs. |
355 | |
386 | |
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368 | |
399 | |
369 | This watcher might use C<%SIG> (depending on the event loop used), |
400 | This watcher might use C<%SIG> (depending on the event loop used), |
370 | so programs overwriting those signals directly will likely not work |
401 | so programs overwriting those signals directly will likely not work |
371 | correctly. |
402 | correctly. |
372 | |
403 | |
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404 | Example: exit on SIGINT |
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405 | |
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406 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
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407 | |
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408 | =head3 Restart Behaviour |
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409 | |
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410 | While restart behaviour is up to the event loop implementation, most will |
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411 | not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's |
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412 | pure perl implementation). |
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413 | |
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414 | =head3 Safe/Unsafe Signals |
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415 | |
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416 | Perl signals can be either "safe" (synchronous to opcode handling) or |
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417 | "unsafe" (asynchronous) - the former might get delayed indefinitely, the |
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418 | latter might corrupt your memory. |
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419 | |
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420 | AnyEvent signal handlers are, in addition, synchronous to the event loop, |
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421 | i.e. they will not interrupt your running perl program but will only be |
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422 | called as part of the normal event handling (just like timer, I/O etc. |
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423 | callbacks, too). |
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424 | |
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425 | =head3 Signal Races, Delays and Workarounds |
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426 | |
373 | Also note that many event loops (e.g. Glib, Tk, Qt, IO::Async) do not |
427 | 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 |
428 | 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 |
429 | do race-free signal handling in perl, requiring C libraries for |
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430 | 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 |
431 | 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 |
432 | specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This |
378 | seconds). This variable can be changed only before the first signal |
433 | variable can be changed only before the first signal watcher is created, |
379 | watcher is created, and should be left alone otherwise. Higher values |
434 | and should be left alone otherwise. This variable determines how often |
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435 | 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 |
436 | will cause fewer spurious wake-ups, which is better for power and CPU |
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437 | saving. |
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438 | |
381 | saving. All these problems can be avoided by installing the optional |
439 | All these problems can be avoided by installing the optional |
382 | L<Async::Interrupt> module. |
440 | L<Async::Interrupt> module, which works with most event loops. It will not |
383 | |
441 | work with inherently broken event loops such as L<Event> or L<Event::Lib> |
384 | Example: exit on SIGINT |
442 | (and not with L<POE> currently, as POE does it's own workaround with |
385 | |
443 | 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 | |
444 | |
388 | =head2 CHILD PROCESS WATCHERS |
445 | =head2 CHILD PROCESS WATCHERS |
389 | |
446 | |
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447 | $w = AnyEvent->child (pid => <process id>, cb => <callback>); |
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448 | |
390 | You can also watch on a child process exit and catch its exit status. |
449 | You can also watch on a child process exit and catch its exit status. |
391 | |
450 | |
392 | The child process is specified by the C<pid> argument (if set to C<0>, it |
451 | 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 |
452 | 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 |
453 | croak). The watcher will be triggered only when the child process has |
395 | any trace events (stopped/continued). |
454 | finished and an exit status is available, not on any trace events |
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455 | (stopped/continued). |
396 | |
456 | |
397 | The callback will be called with the pid and exit status (as returned by |
457 | 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 |
458 | waitpid), so unlike other watcher types, you I<can> rely on child watcher |
399 | callback arguments. |
459 | callback arguments. |
400 | |
460 | |
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441 | # do something else, then wait for process exit |
501 | # do something else, then wait for process exit |
442 | $done->recv; |
502 | $done->recv; |
443 | |
503 | |
444 | =head2 IDLE WATCHERS |
504 | =head2 IDLE WATCHERS |
445 | |
505 | |
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506 | $w = AnyEvent->idle (cb => <callback>); |
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507 | |
446 | Sometimes there is a need to do something, but it is not so important |
508 | 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 |
509 | 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 |
510 | "nothing better to do" is usually defined to be "no other events need |
449 | attention by the event loop". |
511 | attention by the event loop". |
450 | |
512 | |
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476 | }); |
538 | }); |
477 | }); |
539 | }); |
478 | |
540 | |
479 | =head2 CONDITION VARIABLES |
541 | =head2 CONDITION VARIABLES |
480 | |
542 | |
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543 | $cv = AnyEvent->condvar; |
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544 | |
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545 | $cv->send (<list>); |
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546 | my @res = $cv->recv; |
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547 | |
481 | If you are familiar with some event loops you will know that all of them |
548 | 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 |
549 | require you to run some blocking "loop", "run" or similar function that |
483 | will actively watch for new events and call your callbacks. |
550 | will actively watch for new events and call your callbacks. |
484 | |
551 | |
485 | AnyEvent is slightly different: it expects somebody else to run the event |
552 | AnyEvent is slightly different: it expects somebody else to run the event |
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504 | Condition variables are similar to callbacks, except that you can |
571 | Condition variables are similar to callbacks, except that you can |
505 | optionally wait for them. They can also be called merge points - points |
572 | optionally wait for them. They can also be called merge points - points |
506 | in time where multiple outstanding events have been processed. And yet |
573 | in time where multiple outstanding events have been processed. And yet |
507 | another way to call them is transactions - each condition variable can be |
574 | 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 |
575 | used to represent a transaction, which finishes at some point and delivers |
509 | a result. |
576 | a result. And yet some people know them as "futures" - a promise to |
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577 | compute/deliver something that you can wait for. |
510 | |
578 | |
511 | Condition variables are very useful to signal that something has finished, |
579 | Condition variables are very useful to signal that something has finished, |
512 | for example, if you write a module that does asynchronous http requests, |
580 | 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 |
581 | 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 |
582 | availability of results. The user can either act when the callback is |
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548 | after => 1, |
616 | after => 1, |
549 | cb => sub { $result_ready->send }, |
617 | cb => sub { $result_ready->send }, |
550 | ); |
618 | ); |
551 | |
619 | |
552 | # this "blocks" (while handling events) till the callback |
620 | # this "blocks" (while handling events) till the callback |
553 | # calls -<send |
621 | # calls ->send |
554 | $result_ready->recv; |
622 | $result_ready->recv; |
555 | |
623 | |
556 | Example: wait for a timer, but take advantage of the fact that condition |
624 | Example: wait for a timer, but take advantage of the fact that condition |
557 | variables are also callable directly. |
625 | variables are also callable directly. |
558 | |
626 | |
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622 | one. For example, a function that pings many hosts in parallel might want |
690 | one. For example, a function that pings many hosts in parallel might want |
623 | to use a condition variable for the whole process. |
691 | to use a condition variable for the whole process. |
624 | |
692 | |
625 | Every call to C<< ->begin >> will increment a counter, and every call to |
693 | Every call to C<< ->begin >> will increment a counter, and every call to |
626 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
694 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
627 | >>, the (last) callback passed to C<begin> will be executed. That callback |
695 | >>, the (last) callback passed to C<begin> will be executed, passing the |
628 | is I<supposed> to call C<< ->send >>, but that is not required. If no |
696 | condvar as first argument. That callback is I<supposed> to call C<< ->send |
629 | callback was set, C<send> will be called without any arguments. |
697 | >>, but that is not required. If no group callback was set, C<send> will |
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698 | be called without any arguments. |
630 | |
699 | |
631 | You can think of C<< $cv->send >> giving you an OR condition (one call |
700 | You can think of C<< $cv->send >> giving you an OR condition (one call |
632 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
701 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
633 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
702 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
634 | |
703 | |
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661 | begung can potentially be zero: |
730 | begung can potentially be zero: |
662 | |
731 | |
663 | my $cv = AnyEvent->condvar; |
732 | my $cv = AnyEvent->condvar; |
664 | |
733 | |
665 | my %result; |
734 | my %result; |
666 | $cv->begin (sub { $cv->send (\%result) }); |
735 | $cv->begin (sub { shift->send (\%result) }); |
667 | |
736 | |
668 | for my $host (@list_of_hosts) { |
737 | for my $host (@list_of_hosts) { |
669 | $cv->begin; |
738 | $cv->begin; |
670 | ping_host_then_call_callback $host, sub { |
739 | ping_host_then_call_callback $host, sub { |
671 | $result{$host} = ...; |
740 | $result{$host} = ...; |
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746 | =item $cb = $cv->cb ($cb->($cv)) |
815 | =item $cb = $cv->cb ($cb->($cv)) |
747 | |
816 | |
748 | This is a mutator function that returns the callback set and optionally |
817 | This is a mutator function that returns the callback set and optionally |
749 | replaces it before doing so. |
818 | replaces it before doing so. |
750 | |
819 | |
751 | The callback will be called when the condition becomes "true", i.e. when |
820 | 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 |
821 | "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 |
822 | the only argument being the condition variable itself. Calling C<recv> |
754 | is guaranteed not to block. |
823 | inside the callback or at any later time is guaranteed not to block. |
755 | |
824 | |
756 | =back |
825 | =back |
757 | |
826 | |
758 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
827 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
759 | |
828 | |
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762 | =over 4 |
831 | =over 4 |
763 | |
832 | |
764 | =item Backends that are autoprobed when no other event loop can be found. |
833 | =item Backends that are autoprobed when no other event loop can be found. |
765 | |
834 | |
766 | EV is the preferred backend when no other event loop seems to be in |
835 | 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 |
836 | 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 |
837 | pure-perl implementation, which is available everywhere as it comes with |
769 | available everywhere as it comes with AnyEvent itself. |
838 | AnyEvent itself. |
770 | |
839 | |
771 | AnyEvent::Impl::EV based on EV (interface to libev, best choice). |
840 | 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. |
841 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
774 | |
842 | |
775 | =item Backends that are transparently being picked up when they are used. |
843 | =item Backends that are transparently being picked up when they are used. |
776 | |
844 | |
777 | These will be used when they are currently loaded when the first watcher |
845 | 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 |
846 | 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 |
847 | them. This means that AnyEvent will automatically pick the right backend |
780 | when the main program loads an event module before anything starts to |
848 | 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. |
849 | create watchers. Nothing special needs to be done by the main program. |
782 | |
850 | |
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851 | AnyEvent::Impl::Event based on Event, very stable, few glitches. |
783 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
852 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
784 | AnyEvent::Impl::Tk based on Tk, very broken. |
853 | AnyEvent::Impl::Tk based on Tk, very broken. |
785 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
854 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
786 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
855 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
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856 | AnyEvent::Impl::Irssi used when running within irssi. |
787 | |
857 | |
788 | =item Backends with special needs. |
858 | =item Backends with special needs. |
789 | |
859 | |
790 | Qt requires the Qt::Application to be instantiated first, but will |
860 | Qt requires the Qt::Application to be instantiated first, but will |
791 | otherwise be picked up automatically. As long as the main program |
861 | otherwise be picked up automatically. As long as the main program |
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865 | event module detection too early, for example, L<AnyEvent::AIO> creates |
935 | 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 |
936 | and installs the global L<IO::AIO> watcher in a C<post_detect> block to |
867 | avoid autodetecting the event module at load time. |
937 | avoid autodetecting the event module at load time. |
868 | |
938 | |
869 | If called in scalar or list context, then it creates and returns an object |
939 | 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 |
940 | that automatically removes the callback again when it is destroyed (or |
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941 | C<undef> when the hook was immediately executed). See L<AnyEvent::AIO> for |
871 | L<Coro::BDB> for a case where this is useful. |
942 | a case where this is useful. |
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943 | |
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944 | Example: Create a watcher for the IO::AIO module and store it in |
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945 | C<$WATCHER>. Only do so after the event loop is initialised, though. |
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946 | |
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947 | our WATCHER; |
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948 | |
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949 | my $guard = AnyEvent::post_detect { |
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950 | $WATCHER = AnyEvent->io (fh => IO::AIO::poll_fileno, poll => 'r', cb => \&IO::AIO::poll_cb); |
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951 | }; |
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952 | |
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953 | # the ||= is important in case post_detect immediately runs the block, |
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954 | # as to not clobber the newly-created watcher. assigning both watcher and |
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955 | # post_detect guard to the same variable has the advantage of users being |
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956 | # able to just C<undef $WATCHER> if the watcher causes them grief. |
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957 | |
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958 | $WATCHER ||= $guard; |
872 | |
959 | |
873 | =item @AnyEvent::post_detect |
960 | =item @AnyEvent::post_detect |
874 | |
961 | |
875 | If there are any code references in this array (you can C<push> to it |
962 | If there are any code references in this array (you can C<push> to it |
876 | before or after loading AnyEvent), then they will called directly after |
963 | before or after loading AnyEvent), then they will called directly after |
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879 | You should check C<$AnyEvent::MODEL> before adding to this array, though: |
966 | You should check C<$AnyEvent::MODEL> before adding to this array, though: |
880 | if it is defined then the event loop has already been detected, and the |
967 | if it is defined then the event loop has already been detected, and the |
881 | array will be ignored. |
968 | array will be ignored. |
882 | |
969 | |
883 | Best use C<AnyEvent::post_detect { BLOCK }> when your application allows |
970 | Best use C<AnyEvent::post_detect { BLOCK }> when your application allows |
884 | it,as it takes care of these details. |
971 | it, as it takes care of these details. |
885 | |
972 | |
886 | This variable is mainly useful for modules that can do something useful |
973 | This variable is mainly useful for modules that can do something useful |
887 | when AnyEvent is used and thus want to know when it is initialised, but do |
974 | when AnyEvent is used and thus want to know when it is initialised, but do |
888 | not need to even load it by default. This array provides the means to hook |
975 | not need to even load it by default. This array provides the means to hook |
889 | into AnyEvent passively, without loading it. |
976 | into AnyEvent passively, without loading it. |
|
|
977 | |
|
|
978 | Example: To load Coro::AnyEvent whenever Coro and AnyEvent are used |
|
|
979 | together, you could put this into Coro (this is the actual code used by |
|
|
980 | Coro to accomplish this): |
|
|
981 | |
|
|
982 | if (defined $AnyEvent::MODEL) { |
|
|
983 | # AnyEvent already initialised, so load Coro::AnyEvent |
|
|
984 | require Coro::AnyEvent; |
|
|
985 | } else { |
|
|
986 | # AnyEvent not yet initialised, so make sure to load Coro::AnyEvent |
|
|
987 | # as soon as it is |
|
|
988 | push @AnyEvent::post_detect, sub { require Coro::AnyEvent }; |
|
|
989 | } |
890 | |
990 | |
891 | =back |
991 | =back |
892 | |
992 | |
893 | =head1 WHAT TO DO IN A MODULE |
993 | =head1 WHAT TO DO IN A MODULE |
894 | |
994 | |
… | |
… | |
1043 | |
1143 | |
1044 | package AnyEvent; |
1144 | package AnyEvent; |
1045 | |
1145 | |
1046 | # basically a tuned-down version of common::sense |
1146 | # basically a tuned-down version of common::sense |
1047 | sub common_sense { |
1147 | sub common_sense { |
1048 | # no warnings |
1148 | # from common:.sense 1.0 |
1049 | ${^WARNING_BITS} ^= ${^WARNING_BITS}; |
1149 | ${^WARNING_BITS} = "\xfc\x3f\x33\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x00"; |
1050 | # use strict vars subs |
1150 | # use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl) |
1051 | $^H |= 0x00000600; |
1151 | $^H |= 0x00000600; |
1052 | } |
1152 | } |
1053 | |
1153 | |
1054 | BEGIN { AnyEvent::common_sense } |
1154 | BEGIN { AnyEvent::common_sense } |
1055 | |
1155 | |
1056 | use Carp (); |
1156 | use Carp (); |
1057 | |
1157 | |
1058 | our $VERSION = 4.85; |
1158 | our $VERSION = '5.23'; |
1059 | our $MODEL; |
1159 | our $MODEL; |
1060 | |
1160 | |
1061 | our $AUTOLOAD; |
1161 | our $AUTOLOAD; |
1062 | our @ISA; |
1162 | our @ISA; |
1063 | |
1163 | |
1064 | our @REGISTRY; |
1164 | our @REGISTRY; |
1065 | |
|
|
1066 | our $WIN32; |
|
|
1067 | |
1165 | |
1068 | our $VERBOSE; |
1166 | our $VERBOSE; |
1069 | |
1167 | |
1070 | BEGIN { |
1168 | BEGIN { |
1071 | eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }"; |
1169 | eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }"; |
… | |
… | |
1088 | for reverse split /\s*,\s*/, |
1186 | for reverse split /\s*,\s*/, |
1089 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1187 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1090 | } |
1188 | } |
1091 | |
1189 | |
1092 | my @models = ( |
1190 | my @models = ( |
1093 | [EV:: => AnyEvent::Impl::EV::], |
1191 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1094 | [Event:: => AnyEvent::Impl::Event::], |
|
|
1095 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::], |
1192 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], |
1096 | # everything below here will not be autoprobed |
1193 | # everything below here will not (normally) be autoprobed |
1097 | # as the pureperl backend should work everywhere |
1194 | # as the pureperl backend should work everywhere |
1098 | # and is usually faster |
1195 | # and is usually faster |
|
|
1196 | [Event:: => AnyEvent::Impl::Event::, 1], |
1099 | [Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers |
1197 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1100 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1198 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
|
|
1199 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
1101 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1200 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1102 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1201 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1103 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1202 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1104 | [Wx:: => AnyEvent::Impl::POE::], |
1203 | [Wx:: => AnyEvent::Impl::POE::], |
1105 | [Prima:: => AnyEvent::Impl::POE::], |
1204 | [Prima:: => AnyEvent::Impl::POE::], |
1106 | # IO::Async is just too broken - we would need workarounds for its |
1205 | # IO::Async is just too broken - we would need workarounds for its |
1107 | # byzantine signal and broken child handling, among others. |
1206 | # byzantine signal and broken child handling, among others. |
1108 | # IO::Async is rather hard to detect, as it doesn't have any |
1207 | # IO::Async is rather hard to detect, as it doesn't have any |
1109 | # obvious default class. |
1208 | # obvious default class. |
1110 | # [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1209 | [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1111 | # [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1210 | [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1112 | # [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1211 | [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
|
|
1212 | [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1113 | ); |
1213 | ); |
1114 | |
1214 | |
1115 | our %method = map +($_ => 1), |
1215 | our %method = map +($_ => 1), |
1116 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1216 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1117 | |
1217 | |
… | |
… | |
1121 | my ($cb) = @_; |
1221 | my ($cb) = @_; |
1122 | |
1222 | |
1123 | if ($MODEL) { |
1223 | if ($MODEL) { |
1124 | $cb->(); |
1224 | $cb->(); |
1125 | |
1225 | |
1126 | 1 |
1226 | undef |
1127 | } else { |
1227 | } else { |
1128 | push @post_detect, $cb; |
1228 | push @post_detect, $cb; |
1129 | |
1229 | |
1130 | defined wantarray |
1230 | defined wantarray |
1131 | ? bless \$cb, "AnyEvent::Util::postdetect" |
1231 | ? bless \$cb, "AnyEvent::Util::postdetect" |
… | |
… | |
1163 | } |
1263 | } |
1164 | } |
1264 | } |
1165 | } |
1265 | } |
1166 | |
1266 | |
1167 | unless ($MODEL) { |
1267 | unless ($MODEL) { |
1168 | # try to load a model |
1268 | # try to autoload a model |
1169 | |
|
|
1170 | for (@REGISTRY, @models) { |
1269 | for (@REGISTRY, @models) { |
1171 | my ($package, $model) = @$_; |
1270 | my ($package, $model, $autoload) = @$_; |
|
|
1271 | if ( |
|
|
1272 | $autoload |
1172 | if (eval "require $package" |
1273 | and eval "require $package" |
1173 | and ${"$package\::VERSION"} > 0 |
1274 | and ${"$package\::VERSION"} > 0 |
1174 | and eval "require $model") { |
1275 | and eval "require $model" |
|
|
1276 | ) { |
1175 | $MODEL = $model; |
1277 | $MODEL = $model; |
1176 | warn "AnyEvent: autoprobed model '$model', using it.\n" if $VERBOSE >= 2; |
1278 | warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2; |
1177 | last; |
1279 | last; |
1178 | } |
1280 | } |
1179 | } |
1281 | } |
1180 | |
1282 | |
1181 | $MODEL |
1283 | $MODEL |
… | |
… | |
1222 | # we assume CLOEXEC is already set by perl in all important cases |
1324 | # we assume CLOEXEC is already set by perl in all important cases |
1223 | |
1325 | |
1224 | ($fh2, $rw) |
1326 | ($fh2, $rw) |
1225 | } |
1327 | } |
1226 | |
1328 | |
|
|
1329 | =head1 SIMPLIFIED AE API |
|
|
1330 | |
|
|
1331 | Starting with version 5.0, AnyEvent officially supports a second, much |
|
|
1332 | simpler, API that is designed to reduce the calling, typing and memory |
|
|
1333 | overhead. |
|
|
1334 | |
|
|
1335 | See the L<AE> manpage for details. |
|
|
1336 | |
|
|
1337 | =cut |
|
|
1338 | |
|
|
1339 | package AE; |
|
|
1340 | |
|
|
1341 | our $VERSION = $AnyEvent::VERSION; |
|
|
1342 | |
|
|
1343 | sub io($$$) { |
|
|
1344 | AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) |
|
|
1345 | } |
|
|
1346 | |
|
|
1347 | sub timer($$$) { |
|
|
1348 | AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]) |
|
|
1349 | } |
|
|
1350 | |
|
|
1351 | sub signal($$) { |
|
|
1352 | AnyEvent->signal (signal => $_[0], cb => $_[1]) |
|
|
1353 | } |
|
|
1354 | |
|
|
1355 | sub child($$) { |
|
|
1356 | AnyEvent->child (pid => $_[0], cb => $_[1]) |
|
|
1357 | } |
|
|
1358 | |
|
|
1359 | sub idle($) { |
|
|
1360 | AnyEvent->idle (cb => $_[0]) |
|
|
1361 | } |
|
|
1362 | |
|
|
1363 | sub cv(;&) { |
|
|
1364 | AnyEvent->condvar (@_ ? (cb => $_[0]) : ()) |
|
|
1365 | } |
|
|
1366 | |
|
|
1367 | sub now() { |
|
|
1368 | AnyEvent->now |
|
|
1369 | } |
|
|
1370 | |
|
|
1371 | sub now_update() { |
|
|
1372 | AnyEvent->now_update |
|
|
1373 | } |
|
|
1374 | |
|
|
1375 | sub time() { |
|
|
1376 | AnyEvent->time |
|
|
1377 | } |
|
|
1378 | |
1227 | package AnyEvent::Base; |
1379 | package AnyEvent::Base; |
1228 | |
1380 | |
1229 | # default implementations for many methods |
1381 | # default implementations for many methods |
1230 | |
1382 | |
1231 | sub _time { |
1383 | sub _time() { |
1232 | # probe for availability of Time::HiRes |
1384 | # probe for availability of Time::HiRes |
1233 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1385 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1234 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1386 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1235 | *_time = \&Time::HiRes::time; |
1387 | *_time = \&Time::HiRes::time; |
1236 | # if (eval "use POSIX (); (POSIX::times())... |
1388 | # if (eval "use POSIX (); (POSIX::times())... |
… | |
… | |
1253 | } |
1405 | } |
1254 | |
1406 | |
1255 | # default implementation for ->signal |
1407 | # default implementation for ->signal |
1256 | |
1408 | |
1257 | our $HAVE_ASYNC_INTERRUPT; |
1409 | our $HAVE_ASYNC_INTERRUPT; |
|
|
1410 | |
|
|
1411 | sub _have_async_interrupt() { |
|
|
1412 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
|
|
1413 | && eval "use Async::Interrupt 1.02 (); 1") |
|
|
1414 | unless defined $HAVE_ASYNC_INTERRUPT; |
|
|
1415 | |
|
|
1416 | $HAVE_ASYNC_INTERRUPT |
|
|
1417 | } |
|
|
1418 | |
1258 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1419 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1259 | our (%SIG_ASY, %SIG_ASY_W); |
1420 | our (%SIG_ASY, %SIG_ASY_W); |
1260 | our ($SIG_COUNT, $SIG_TW); |
1421 | our ($SIG_COUNT, $SIG_TW); |
1261 | |
1422 | |
1262 | sub _signal_exec { |
1423 | sub _signal_exec { |
1263 | $HAVE_ASYNC_INTERRUPT |
1424 | $HAVE_ASYNC_INTERRUPT |
1264 | ? $SIGPIPE_R->drain |
1425 | ? $SIGPIPE_R->drain |
1265 | : sysread $SIGPIPE_R, my $dummy, 9; |
1426 | : sysread $SIGPIPE_R, (my $dummy), 9; |
1266 | |
1427 | |
1267 | while (%SIG_EV) { |
1428 | while (%SIG_EV) { |
1268 | for (keys %SIG_EV) { |
1429 | for (keys %SIG_EV) { |
1269 | delete $SIG_EV{$_}; |
1430 | delete $SIG_EV{$_}; |
1270 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1431 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1271 | } |
1432 | } |
1272 | } |
1433 | } |
1273 | } |
1434 | } |
1274 | |
1435 | |
1275 | # install a dumym wakeupw atcher to reduce signal catching latency |
1436 | # install a dummy wakeup watcher to reduce signal catching latency |
1276 | sub _sig_add() { |
1437 | sub _sig_add() { |
1277 | unless ($SIG_COUNT++) { |
1438 | unless ($SIG_COUNT++) { |
1278 | # try to align timer on a full-second boundary, if possible |
1439 | # try to align timer on a full-second boundary, if possible |
1279 | my $NOW = AnyEvent->now; |
1440 | my $NOW = AE::now; |
1280 | |
1441 | |
1281 | $SIG_TW = AnyEvent->timer ( |
1442 | $SIG_TW = AE::timer |
1282 | after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1443 | $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1283 | interval => $MAX_SIGNAL_LATENCY, |
1444 | $MAX_SIGNAL_LATENCY, |
1284 | cb => sub { }, # just for the PERL_ASYNC_CHECK |
1445 | sub { } # just for the PERL_ASYNC_CHECK |
1285 | ); |
1446 | ; |
1286 | } |
1447 | } |
1287 | } |
1448 | } |
1288 | |
1449 | |
1289 | sub _sig_del { |
1450 | sub _sig_del { |
1290 | undef $SIG_TW |
1451 | undef $SIG_TW |
1291 | unless --$SIG_COUNT; |
1452 | unless --$SIG_COUNT; |
1292 | } |
1453 | } |
1293 | |
1454 | |
|
|
1455 | our $_sig_name_init; $_sig_name_init = sub { |
|
|
1456 | eval q{ # poor man's autoloading |
|
|
1457 | undef $_sig_name_init; |
|
|
1458 | |
|
|
1459 | if (_have_async_interrupt) { |
|
|
1460 | *sig2num = \&Async::Interrupt::sig2num; |
|
|
1461 | *sig2name = \&Async::Interrupt::sig2name; |
|
|
1462 | } else { |
|
|
1463 | require Config; |
|
|
1464 | |
|
|
1465 | my %signame2num; |
|
|
1466 | @signame2num{ split ' ', $Config::Config{sig_name} } |
|
|
1467 | = split ' ', $Config::Config{sig_num}; |
|
|
1468 | |
|
|
1469 | my @signum2name; |
|
|
1470 | @signum2name[values %signame2num] = keys %signame2num; |
|
|
1471 | |
|
|
1472 | *sig2num = sub($) { |
|
|
1473 | $_[0] > 0 ? shift : $signame2num{+shift} |
|
|
1474 | }; |
|
|
1475 | *sig2name = sub ($) { |
|
|
1476 | $_[0] > 0 ? $signum2name[+shift] : shift |
|
|
1477 | }; |
|
|
1478 | } |
|
|
1479 | }; |
|
|
1480 | die if $@; |
|
|
1481 | }; |
|
|
1482 | |
|
|
1483 | sub sig2num ($) { &$_sig_name_init; &sig2num } |
|
|
1484 | sub sig2name($) { &$_sig_name_init; &sig2name } |
|
|
1485 | |
1294 | sub _signal { |
1486 | sub signal { |
|
|
1487 | eval q{ # poor man's autoloading {} |
|
|
1488 | # probe for availability of Async::Interrupt |
|
|
1489 | if (_have_async_interrupt) { |
|
|
1490 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1491 | |
|
|
1492 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1493 | $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; |
|
|
1494 | |
|
|
1495 | } else { |
|
|
1496 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1497 | |
|
|
1498 | require Fcntl; |
|
|
1499 | |
|
|
1500 | if (AnyEvent::WIN32) { |
|
|
1501 | require AnyEvent::Util; |
|
|
1502 | |
|
|
1503 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1504 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R; |
|
|
1505 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case |
|
|
1506 | } else { |
|
|
1507 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1508 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1509 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1510 | |
|
|
1511 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1512 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1513 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1514 | } |
|
|
1515 | |
|
|
1516 | $SIGPIPE_R |
|
|
1517 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1518 | |
|
|
1519 | $SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec; |
|
|
1520 | } |
|
|
1521 | |
|
|
1522 | *signal = sub { |
1295 | my (undef, %arg) = @_; |
1523 | my (undef, %arg) = @_; |
1296 | |
1524 | |
1297 | my $signal = uc $arg{signal} |
1525 | my $signal = uc $arg{signal} |
1298 | or Carp::croak "required option 'signal' is missing"; |
1526 | or Carp::croak "required option 'signal' is missing"; |
1299 | |
1527 | |
1300 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1301 | |
|
|
1302 | if ($HAVE_ASYNC_INTERRUPT) { |
1528 | if ($HAVE_ASYNC_INTERRUPT) { |
1303 | # async::interrupt |
1529 | # async::interrupt |
1304 | |
1530 | |
1305 | $SIG_ASY{$signal} ||= do { |
1531 | $signal = sig2num $signal; |
1306 | my $asy = new Async::Interrupt |
1532 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1533 | |
|
|
1534 | $SIG_ASY{$signal} ||= new Async::Interrupt |
1307 | cb => sub { undef $SIG_EV{$signal} }, |
1535 | cb => sub { undef $SIG_EV{$signal} }, |
1308 | signal => $signal, |
1536 | signal => $signal, |
1309 | pipe => [$SIGPIPE_R->filenos], |
1537 | pipe => [$SIGPIPE_R->filenos], |
|
|
1538 | pipe_autodrain => 0, |
|
|
1539 | ; |
|
|
1540 | |
|
|
1541 | } else { |
|
|
1542 | # pure perl |
|
|
1543 | |
|
|
1544 | # AE::Util has been loaded in signal |
|
|
1545 | $signal = sig2name $signal; |
|
|
1546 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1547 | |
|
|
1548 | $SIG{$signal} ||= sub { |
|
|
1549 | local $!; |
|
|
1550 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
|
|
1551 | undef $SIG_EV{$signal}; |
|
|
1552 | }; |
|
|
1553 | |
|
|
1554 | # can't do signal processing without introducing races in pure perl, |
|
|
1555 | # so limit the signal latency. |
|
|
1556 | _sig_add; |
1310 | ; |
1557 | } |
1311 | $asy->pipe_autodrain (0); |
|
|
1312 | |
1558 | |
1313 | $asy |
1559 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
1314 | }; |
1560 | }; |
1315 | |
1561 | |
1316 | } else { |
1562 | *AnyEvent::Base::signal::DESTROY = sub { |
1317 | # pure perl |
1563 | my ($signal, $cb) = @{$_[0]}; |
1318 | |
1564 | |
1319 | $SIG{$signal} ||= sub { |
1565 | _sig_del; |
1320 | local $!; |
1566 | |
1321 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
1567 | delete $SIG_CB{$signal}{$cb}; |
|
|
1568 | |
|
|
1569 | $HAVE_ASYNC_INTERRUPT |
|
|
1570 | ? delete $SIG_ASY{$signal} |
|
|
1571 | : # delete doesn't work with older perls - they then |
|
|
1572 | # print weird messages, or just unconditionally exit |
|
|
1573 | # instead of getting the default action. |
1322 | undef $SIG_EV{$signal}; |
1574 | undef $SIG{$signal} |
|
|
1575 | unless keys %{ $SIG_CB{$signal} }; |
1323 | }; |
1576 | }; |
1324 | |
|
|
1325 | # can't do signal processing without introducing races in pure perl, |
|
|
1326 | # so limit the signal latency. |
|
|
1327 | _sig_add; |
|
|
1328 | } |
1577 | }; |
1329 | |
1578 | die if $@; |
1330 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
|
|
1331 | } |
|
|
1332 | |
|
|
1333 | sub signal { |
|
|
1334 | # probe for availability of Async::Interrupt |
|
|
1335 | if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") { |
|
|
1336 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1337 | |
|
|
1338 | $HAVE_ASYNC_INTERRUPT = 1; |
|
|
1339 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1340 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec); |
|
|
1341 | |
|
|
1342 | } else { |
|
|
1343 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1344 | |
|
|
1345 | require Fcntl; |
|
|
1346 | |
|
|
1347 | if (AnyEvent::WIN32) { |
|
|
1348 | require AnyEvent::Util; |
|
|
1349 | |
|
|
1350 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1351 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R; |
|
|
1352 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case |
|
|
1353 | } else { |
|
|
1354 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1355 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1356 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1357 | |
|
|
1358 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1359 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1360 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1361 | } |
|
|
1362 | |
|
|
1363 | $SIGPIPE_R |
|
|
1364 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1365 | |
|
|
1366 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec); |
|
|
1367 | } |
|
|
1368 | |
|
|
1369 | *signal = \&_signal; |
|
|
1370 | &signal |
1579 | &signal |
1371 | } |
|
|
1372 | |
|
|
1373 | sub AnyEvent::Base::signal::DESTROY { |
|
|
1374 | my ($signal, $cb) = @{$_[0]}; |
|
|
1375 | |
|
|
1376 | _sig_del; |
|
|
1377 | |
|
|
1378 | delete $SIG_CB{$signal}{$cb}; |
|
|
1379 | |
|
|
1380 | $HAVE_ASYNC_INTERRUPT |
|
|
1381 | ? delete $SIG_ASY{$signal} |
|
|
1382 | : # delete doesn't work with older perls - they then |
|
|
1383 | # print weird messages, or just unconditionally exit |
|
|
1384 | # instead of getting the default action. |
|
|
1385 | undef $SIG{$signal} |
|
|
1386 | unless keys %{ $SIG_CB{$signal} }; |
|
|
1387 | } |
1580 | } |
1388 | |
1581 | |
1389 | # default implementation for ->child |
1582 | # default implementation for ->child |
1390 | |
1583 | |
1391 | our %PID_CB; |
1584 | our %PID_CB; |
1392 | our $CHLD_W; |
1585 | our $CHLD_W; |
1393 | our $CHLD_DELAY_W; |
1586 | our $CHLD_DELAY_W; |
1394 | our $WNOHANG; |
1587 | our $WNOHANG; |
1395 | |
1588 | |
|
|
1589 | sub _emit_childstatus($$) { |
|
|
1590 | my (undef, $rpid, $rstatus) = @_; |
|
|
1591 | |
|
|
1592 | $_->($rpid, $rstatus) |
|
|
1593 | for values %{ $PID_CB{$rpid} || {} }, |
|
|
1594 | values %{ $PID_CB{0} || {} }; |
|
|
1595 | } |
|
|
1596 | |
1396 | sub _sigchld { |
1597 | sub _sigchld { |
|
|
1598 | my $pid; |
|
|
1599 | |
|
|
1600 | AnyEvent->_emit_childstatus ($pid, $?) |
1397 | while (0 < (my $pid = waitpid -1, $WNOHANG)) { |
1601 | while ($pid = waitpid -1, $WNOHANG) > 0; |
1398 | $_->($pid, $?) |
|
|
1399 | for values %{ $PID_CB{$pid} || {} }, |
|
|
1400 | values %{ $PID_CB{0} || {} }; |
|
|
1401 | } |
|
|
1402 | } |
1602 | } |
1403 | |
1603 | |
1404 | sub child { |
1604 | sub child { |
1405 | my (undef, %arg) = @_; |
1605 | my (undef, %arg) = @_; |
1406 | |
1606 | |
… | |
… | |
1413 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1613 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1414 | ? 1 |
1614 | ? 1 |
1415 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1615 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1416 | |
1616 | |
1417 | unless ($CHLD_W) { |
1617 | unless ($CHLD_W) { |
1418 | $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld); |
1618 | $CHLD_W = AE::signal CHLD => \&_sigchld; |
1419 | # child could be a zombie already, so make at least one round |
1619 | # child could be a zombie already, so make at least one round |
1420 | &_sigchld; |
1620 | &_sigchld; |
1421 | } |
1621 | } |
1422 | |
1622 | |
1423 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
1623 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
… | |
… | |
1449 | # never use more then 50% of the time for the idle watcher, |
1649 | # never use more then 50% of the time for the idle watcher, |
1450 | # within some limits |
1650 | # within some limits |
1451 | $w = 0.0001 if $w < 0.0001; |
1651 | $w = 0.0001 if $w < 0.0001; |
1452 | $w = 5 if $w > 5; |
1652 | $w = 5 if $w > 5; |
1453 | |
1653 | |
1454 | $w = AnyEvent->timer (after => $w, cb => $rcb); |
1654 | $w = AE::timer $w, 0, $rcb; |
1455 | } else { |
1655 | } else { |
1456 | # clean up... |
1656 | # clean up... |
1457 | undef $w; |
1657 | undef $w; |
1458 | undef $rcb; |
1658 | undef $rcb; |
1459 | } |
1659 | } |
1460 | }; |
1660 | }; |
1461 | |
1661 | |
1462 | $w = AnyEvent->timer (after => 0.05, cb => $rcb); |
1662 | $w = AE::timer 0.05, 0, $rcb; |
1463 | |
1663 | |
1464 | bless \\$cb, "AnyEvent::Base::idle" |
1664 | bless \\$cb, "AnyEvent::Base::idle" |
1465 | } |
1665 | } |
1466 | |
1666 | |
1467 | sub AnyEvent::Base::idle::DESTROY { |
1667 | sub AnyEvent::Base::idle::DESTROY { |
… | |
… | |
1521 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1721 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1522 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1722 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1523 | } |
1723 | } |
1524 | |
1724 | |
1525 | sub cb { |
1725 | sub cb { |
1526 | $_[0]{_ae_cb} = $_[1] if @_ > 1; |
1726 | my $cv = shift; |
|
|
1727 | |
|
|
1728 | @_ |
|
|
1729 | and $cv->{_ae_cb} = shift |
|
|
1730 | and $cv->{_ae_sent} |
|
|
1731 | and (delete $cv->{_ae_cb})->($cv); |
|
|
1732 | |
1527 | $_[0]{_ae_cb} |
1733 | $cv->{_ae_cb} |
1528 | } |
1734 | } |
1529 | |
1735 | |
1530 | sub begin { |
1736 | sub begin { |
1531 | ++$_[0]{_ae_counter}; |
1737 | ++$_[0]{_ae_counter}; |
1532 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
1738 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
… | |
… | |
1741 | warn "read: $input\n"; # output what has been read |
1947 | warn "read: $input\n"; # output what has been read |
1742 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1948 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1743 | }, |
1949 | }, |
1744 | ); |
1950 | ); |
1745 | |
1951 | |
1746 | my $time_watcher; # can only be used once |
|
|
1747 | |
|
|
1748 | sub new_timer { |
|
|
1749 | $timer = AnyEvent->timer (after => 1, cb => sub { |
1952 | my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub { |
1750 | warn "timeout\n"; # print 'timeout' about every second |
1953 | warn "timeout\n"; # print 'timeout' at most every second |
1751 | &new_timer; # and restart the time |
|
|
1752 | }); |
1954 | }); |
1753 | } |
|
|
1754 | |
|
|
1755 | new_timer; # create first timer |
|
|
1756 | |
1955 | |
1757 | $cv->recv; # wait until user enters /^q/i |
1956 | $cv->recv; # wait until user enters /^q/i |
1758 | |
1957 | |
1759 | =head1 REAL-WORLD EXAMPLE |
1958 | =head1 REAL-WORLD EXAMPLE |
1760 | |
1959 | |
… | |
… | |
1891 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
2090 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
1892 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
2091 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
1893 | which it is), lets them fire exactly once and destroys them again. |
2092 | which it is), lets them fire exactly once and destroys them again. |
1894 | |
2093 | |
1895 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
2094 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
1896 | distribution. |
2095 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2096 | for the EV and Perl backends only. |
1897 | |
2097 | |
1898 | =head3 Explanation of the columns |
2098 | =head3 Explanation of the columns |
1899 | |
2099 | |
1900 | I<watcher> is the number of event watchers created/destroyed. Since |
2100 | I<watcher> is the number of event watchers created/destroyed. Since |
1901 | different event models feature vastly different performances, each event |
2101 | different event models feature vastly different performances, each event |
… | |
… | |
1922 | watcher. |
2122 | watcher. |
1923 | |
2123 | |
1924 | =head3 Results |
2124 | =head3 Results |
1925 | |
2125 | |
1926 | name watchers bytes create invoke destroy comment |
2126 | name watchers bytes create invoke destroy comment |
1927 | EV/EV 400000 224 0.47 0.35 0.27 EV native interface |
2127 | EV/EV 100000 223 0.47 0.43 0.27 EV native interface |
1928 | EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers |
2128 | EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers |
1929 | CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal |
2129 | Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal |
1930 | Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation |
2130 | Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation |
1931 | Event/Event 16000 517 32.20 31.80 0.81 Event native interface |
2131 | Event/Event 16000 516 31.16 31.84 0.82 Event native interface |
1932 | Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers |
2132 | Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers |
1933 | IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll |
2133 | IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll |
1934 | IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll |
2134 | IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll |
1935 | Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour |
2135 | Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour |
1936 | Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers |
2136 | Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers |
1937 | POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event |
2137 | POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event |
1938 | POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select |
2138 | POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select |
1939 | |
2139 | |
1940 | =head3 Discussion |
2140 | =head3 Discussion |
1941 | |
2141 | |
1942 | The benchmark does I<not> measure scalability of the event loop very |
2142 | The benchmark does I<not> measure scalability of the event loop very |
1943 | well. For example, a select-based event loop (such as the pure perl one) |
2143 | well. For example, a select-based event loop (such as the pure perl one) |
… | |
… | |
1955 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
2155 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
1956 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
2156 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
1957 | cycles with POE. |
2157 | cycles with POE. |
1958 | |
2158 | |
1959 | C<EV> is the sole leader regarding speed and memory use, which are both |
2159 | C<EV> is the sole leader regarding speed and memory use, which are both |
1960 | maximal/minimal, respectively. Even when going through AnyEvent, it uses |
2160 | maximal/minimal, respectively. When using the L<AE> API there is zero |
|
|
2161 | overhead (when going through the AnyEvent API create is about 5-6 times |
|
|
2162 | slower, with other times being equal, so still uses far less memory than |
1961 | far less memory than any other event loop and is still faster than Event |
2163 | any other event loop and is still faster than Event natively). |
1962 | natively. |
|
|
1963 | |
2164 | |
1964 | The pure perl implementation is hit in a few sweet spots (both the |
2165 | The pure perl implementation is hit in a few sweet spots (both the |
1965 | constant timeout and the use of a single fd hit optimisations in the perl |
2166 | constant timeout and the use of a single fd hit optimisations in the perl |
1966 | interpreter and the backend itself). Nevertheless this shows that it |
2167 | interpreter and the backend itself). Nevertheless this shows that it |
1967 | adds very little overhead in itself. Like any select-based backend its |
2168 | adds very little overhead in itself. Like any select-based backend its |
… | |
… | |
2041 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2242 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2042 | (1%) are active. This mirrors the activity of large servers with many |
2243 | (1%) are active. This mirrors the activity of large servers with many |
2043 | connections, most of which are idle at any one point in time. |
2244 | connections, most of which are idle at any one point in time. |
2044 | |
2245 | |
2045 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2246 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2046 | distribution. |
2247 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2248 | for the EV and Perl backends only. |
2047 | |
2249 | |
2048 | =head3 Explanation of the columns |
2250 | =head3 Explanation of the columns |
2049 | |
2251 | |
2050 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2252 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2051 | each server has a read and write socket end). |
2253 | each server has a read and write socket end). |
… | |
… | |
2059 | a new one that moves the timeout into the future. |
2261 | a new one that moves the timeout into the future. |
2060 | |
2262 | |
2061 | =head3 Results |
2263 | =head3 Results |
2062 | |
2264 | |
2063 | name sockets create request |
2265 | name sockets create request |
2064 | EV 20000 69.01 11.16 |
2266 | EV 20000 62.66 7.99 |
2065 | Perl 20000 73.32 35.87 |
2267 | Perl 20000 68.32 32.64 |
2066 | IOAsync 20000 157.00 98.14 epoll |
2268 | IOAsync 20000 174.06 101.15 epoll |
2067 | IOAsync 20000 159.31 616.06 poll |
2269 | IOAsync 20000 174.67 610.84 poll |
2068 | Event 20000 212.62 257.32 |
2270 | Event 20000 202.69 242.91 |
2069 | Glib 20000 651.16 1896.30 |
2271 | Glib 20000 557.01 1689.52 |
2070 | POE 20000 349.67 12317.24 uses POE::Loop::Event |
2272 | POE 20000 341.54 12086.32 uses POE::Loop::Event |
2071 | |
2273 | |
2072 | =head3 Discussion |
2274 | =head3 Discussion |
2073 | |
2275 | |
2074 | This benchmark I<does> measure scalability and overall performance of the |
2276 | This benchmark I<does> measure scalability and overall performance of the |
2075 | particular event loop. |
2277 | particular event loop. |
… | |
… | |
2201 | As you can see, the AnyEvent + EV combination even beats the |
2403 | As you can see, the AnyEvent + EV combination even beats the |
2202 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2404 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2203 | backend easily beats IO::Lambda and POE. |
2405 | backend easily beats IO::Lambda and POE. |
2204 | |
2406 | |
2205 | And even the 100% non-blocking version written using the high-level (and |
2407 | And even the 100% non-blocking version written using the high-level (and |
2206 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a |
2408 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda |
2207 | large margin, even though it does all of DNS, tcp-connect and socket I/O |
2409 | higher level ("unoptimised") abstractions by a large margin, even though |
2208 | in a non-blocking way. |
2410 | it does all of DNS, tcp-connect and socket I/O in a non-blocking way. |
2209 | |
2411 | |
2210 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2412 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2211 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2413 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2212 | part of the IO::lambda distribution and were used without any changes. |
2414 | part of the IO::Lambda distribution and were used without any changes. |
2213 | |
2415 | |
2214 | |
2416 | |
2215 | =head1 SIGNALS |
2417 | =head1 SIGNALS |
2216 | |
2418 | |
2217 | AnyEvent currently installs handlers for these signals: |
2419 | AnyEvent currently installs handlers for these signals: |
… | |
… | |
2259 | it's built-in modules) are required to use it. |
2461 | it's built-in modules) are required to use it. |
2260 | |
2462 | |
2261 | That does not mean that AnyEvent won't take advantage of some additional |
2463 | That does not mean that AnyEvent won't take advantage of some additional |
2262 | modules if they are installed. |
2464 | modules if they are installed. |
2263 | |
2465 | |
2264 | This section epxlains which additional modules will be used, and how they |
2466 | This section explains which additional modules will be used, and how they |
2265 | affect AnyEvent's operetion. |
2467 | affect AnyEvent's operation. |
2266 | |
2468 | |
2267 | =over 4 |
2469 | =over 4 |
2268 | |
2470 | |
2269 | =item L<Async::Interrupt> |
2471 | =item L<Async::Interrupt> |
2270 | |
2472 | |
2271 | This slightly arcane module is used to implement fast signal handling: To |
2473 | This slightly arcane module is used to implement fast signal handling: To |
2272 | my knowledge, there is no way to do completely race-free and quick |
2474 | my knowledge, there is no way to do completely race-free and quick |
2273 | signal handling in pure perl. To ensure that signals still get |
2475 | signal handling in pure perl. To ensure that signals still get |
2274 | delivered, AnyEvent will start an interval timer to wake up perl (and |
2476 | delivered, AnyEvent will start an interval timer to wake up perl (and |
2275 | catch the signals) with soemd elay (default is 10 seconds, look for |
2477 | catch the signals) with some delay (default is 10 seconds, look for |
2276 | C<$AnyEvent::MAX_SIGNAL_LATENCY>). |
2478 | C<$AnyEvent::MAX_SIGNAL_LATENCY>). |
2277 | |
2479 | |
2278 | If this module is available, then it will be used to implement signal |
2480 | If this module is available, then it will be used to implement signal |
2279 | catching, which means that signals will not be delayed, and the event loop |
2481 | catching, which means that signals will not be delayed, and the event loop |
2280 | will not be interrupted regularly, which is more efficient (And good for |
2482 | will not be interrupted regularly, which is more efficient (and good for |
2281 | battery life on laptops). |
2483 | battery life on laptops). |
2282 | |
2484 | |
2283 | This affects not just the pure-perl event loop, but also other event loops |
2485 | This affects not just the pure-perl event loop, but also other event loops |
2284 | that have no signal handling on their own (e.g. Glib, Tk, Qt). |
2486 | that have no signal handling on their own (e.g. Glib, Tk, Qt). |
|
|
2487 | |
|
|
2488 | Some event loops (POE, Event, Event::Lib) offer signal watchers natively, |
|
|
2489 | and either employ their own workarounds (POE) or use AnyEvent's workaround |
|
|
2490 | (using C<$AnyEvent::MAX_SIGNAL_LATENCY>). Installing L<Async::Interrupt> |
|
|
2491 | does nothing for those backends. |
2285 | |
2492 | |
2286 | =item L<EV> |
2493 | =item L<EV> |
2287 | |
2494 | |
2288 | This module isn't really "optional", as it is simply one of the backend |
2495 | This module isn't really "optional", as it is simply one of the backend |
2289 | event loops that AnyEvent can use. However, it is simply the best event |
2496 | event loops that AnyEvent can use. However, it is simply the best event |
… | |
… | |
2301 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2508 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2302 | purely used for performance. |
2509 | purely used for performance. |
2303 | |
2510 | |
2304 | =item L<JSON> and L<JSON::XS> |
2511 | =item L<JSON> and L<JSON::XS> |
2305 | |
2512 | |
2306 | This module is required when you want to read or write JSON data via |
2513 | One of these modules is required when you want to read or write JSON data |
2307 | L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2514 | via L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2308 | advantage of the ulta-high-speed L<JSON::XS> module when it is installed. |
2515 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2309 | |
2516 | |
2310 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2517 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2311 | installed. |
2518 | installed. |
2312 | |
2519 | |
2313 | =item L<Net::SSLeay> |
2520 | =item L<Net::SSLeay> |
… | |
… | |
2330 | |
2537 | |
2331 | Most event libraries are not fork-safe. The ones who are usually are |
2538 | Most event libraries are not fork-safe. The ones who are usually are |
2332 | because they rely on inefficient but fork-safe C<select> or C<poll> |
2539 | because they rely on inefficient but fork-safe C<select> or C<poll> |
2333 | calls. Only L<EV> is fully fork-aware. |
2540 | calls. Only L<EV> is fully fork-aware. |
2334 | |
2541 | |
|
|
2542 | This means that, in general, you cannot fork and do event processing |
|
|
2543 | in the child if a watcher was created before the fork (which in turn |
|
|
2544 | initialises the event library). |
|
|
2545 | |
2335 | If you have to fork, you must either do so I<before> creating your first |
2546 | If you have to fork, you must either do so I<before> creating your first |
2336 | watcher OR you must not use AnyEvent at all in the child OR you must do |
2547 | watcher OR you must not use AnyEvent at all in the child OR you must do |
2337 | something completely out of the scope of AnyEvent. |
2548 | something completely out of the scope of AnyEvent. |
|
|
2549 | |
|
|
2550 | The problem of doing event processing in the parent I<and> the child |
|
|
2551 | is much more complicated: even for backends that I<are> fork-aware or |
|
|
2552 | fork-safe, their behaviour is not usually what you want: fork clones all |
|
|
2553 | watchers, that means all timers, I/O watchers etc. are active in both |
|
|
2554 | parent and child, which is almost never what you want. |
2338 | |
2555 | |
2339 | |
2556 | |
2340 | =head1 SECURITY CONSIDERATIONS |
2557 | =head1 SECURITY CONSIDERATIONS |
2341 | |
2558 | |
2342 | AnyEvent can be forced to load any event model via |
2559 | AnyEvent can be forced to load any event model via |
… | |
… | |
2380 | L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
2597 | L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
2381 | |
2598 | |
2382 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
2599 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
2383 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
2600 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
2384 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
2601 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
2385 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>. |
2602 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. |
2386 | |
2603 | |
2387 | Non-blocking file handles, sockets, TCP clients and |
2604 | Non-blocking file handles, sockets, TCP clients and |
2388 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
2605 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
2389 | |
2606 | |
2390 | Asynchronous DNS: L<AnyEvent::DNS>. |
2607 | Asynchronous DNS: L<AnyEvent::DNS>. |