1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | AnyEvent - provide framework for multiple event loops |
3 | AnyEvent - provide framework for multiple event loops |
4 | |
4 | |
5 | EV, Event, Coro::EV, Coro::Event, Glib, Tk, Perl, Event::Lib, Qt, POE - various supported event loops |
5 | EV, Event, Glib, Tk, Perl, Event::Lib, Qt, POE - various supported event loops |
6 | |
6 | |
7 | =head1 SYNOPSIS |
7 | =head1 SYNOPSIS |
8 | |
8 | |
9 | use AnyEvent; |
9 | use AnyEvent; |
10 | |
10 | |
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15 | my $w = AnyEvent->timer (after => $seconds, cb => sub { |
15 | my $w = AnyEvent->timer (after => $seconds, cb => sub { |
16 | ... |
16 | ... |
17 | }); |
17 | }); |
18 | |
18 | |
19 | my $w = AnyEvent->condvar; # stores whether a condition was flagged |
19 | my $w = AnyEvent->condvar; # stores whether a condition was flagged |
20 | $w->wait; # enters "main loop" till $condvar gets ->broadcast |
20 | $w->wait; # enters "main loop" till $condvar gets ->send |
21 | $w->broadcast; # wake up current and all future wait's |
21 | $w->send; # wake up current and all future wait's |
22 | |
22 | |
23 | =head1 WHY YOU SHOULD USE THIS MODULE (OR NOT) |
23 | =head1 WHY YOU SHOULD USE THIS MODULE (OR NOT) |
24 | |
24 | |
25 | Glib, POE, IO::Async, Event... CPAN offers event models by the dozen |
25 | Glib, POE, IO::Async, Event... CPAN offers event models by the dozen |
26 | nowadays. So what is different about AnyEvent? |
26 | nowadays. So what is different about AnyEvent? |
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78 | The interface itself is vaguely similar, but not identical to the L<Event> |
78 | The interface itself is vaguely similar, but not identical to the L<Event> |
79 | module. |
79 | module. |
80 | |
80 | |
81 | During the first call of any watcher-creation method, the module tries |
81 | During the first call of any watcher-creation method, the module tries |
82 | to detect the currently loaded event loop by probing whether one of the |
82 | to detect the currently loaded event loop by probing whether one of the |
83 | following modules is already loaded: L<Coro::EV>, L<Coro::Event>, L<EV>, |
83 | following modules is already loaded: L<EV>, |
84 | L<Event>, L<Glib>, L<AnyEvent::Impl::Perl>, L<Tk>, L<Event::Lib>, L<Qt>, |
84 | L<Event>, L<Glib>, L<AnyEvent::Impl::Perl>, L<Tk>, L<Event::Lib>, L<Qt>, |
85 | L<POE>. The first one found is used. If none are found, the module tries |
85 | L<POE>. The first one found is used. If none are found, the module tries |
86 | to load these modules (excluding Tk, Event::Lib, Qt and POE as the pure perl |
86 | to load these modules (excluding Tk, Event::Lib, Qt and POE as the pure perl |
87 | adaptor should always succeed) in the order given. The first one that can |
87 | adaptor should always succeed) in the order given. The first one that can |
88 | be successfully loaded will be used. If, after this, still none could be |
88 | be successfully loaded will be used. If, after this, still none could be |
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288 | my $w = AnyEvent->child ( |
288 | my $w = AnyEvent->child ( |
289 | pid => $pid, |
289 | pid => $pid, |
290 | cb => sub { |
290 | cb => sub { |
291 | my ($pid, $status) = @_; |
291 | my ($pid, $status) = @_; |
292 | warn "pid $pid exited with status $status"; |
292 | warn "pid $pid exited with status $status"; |
293 | $done->broadcast; |
293 | $done->send; |
294 | }, |
294 | }, |
295 | ); |
295 | ); |
296 | |
296 | |
297 | # do something else, then wait for process exit |
297 | # do something else, then wait for process exit |
298 | $done->wait; |
298 | $done->wait; |
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313 | >> method, usually without arguments. The only argument pair allowed is |
313 | >> method, usually without arguments. The only argument pair allowed is |
314 | C<cb>, which specifies a callback to be called when the condition variable |
314 | C<cb>, which specifies a callback to be called when the condition variable |
315 | becomes true. |
315 | becomes true. |
316 | |
316 | |
317 | After creation, the conditon variable is "false" until it becomes "true" |
317 | After creation, the conditon variable is "false" until it becomes "true" |
318 | by calling the C<broadcast> method. |
318 | by calling the C<send> method. |
319 | |
319 | |
320 | Condition variables are similar to callbacks, except that you can |
320 | Condition variables are similar to callbacks, except that you can |
321 | optionally wait for them. They can also be called merge points - points |
321 | optionally wait for them. They can also be called merge points - points |
322 | in time where multiple outstandign events have been processed. And yet |
322 | in time where multiple outstandign events have been processed. And yet |
323 | another way to call them is transations - each condition variable can be |
323 | another way to call them is transations - each condition variable can be |
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331 | called or can synchronously C<< ->wait >> for the results. |
331 | called or can synchronously C<< ->wait >> for the results. |
332 | |
332 | |
333 | You can also use them to simulate traditional event loops - for example, |
333 | You can also use them to simulate traditional event loops - for example, |
334 | you can block your main program until an event occurs - for example, you |
334 | you can block your main program until an event occurs - for example, you |
335 | could C<< ->wait >> in your main program until the user clicks the Quit |
335 | could C<< ->wait >> in your main program until the user clicks the Quit |
336 | button of your app, which would C<< ->broadcast >> the "quit" event. |
336 | button of your app, which would C<< ->send >> the "quit" event. |
337 | |
337 | |
338 | Note that condition variables recurse into the event loop - if you have |
338 | Note that condition variables recurse into the event loop - if you have |
339 | two pieces of code that call C<< ->wait >> in a round-robbin fashion, you |
339 | two pieces of code that call C<< ->wait >> in a round-robbin fashion, you |
340 | lose. Therefore, condition variables are good to export to your caller, but |
340 | lose. Therefore, condition variables are good to export to your caller, but |
341 | you should avoid making a blocking wait yourself, at least in callbacks, |
341 | you should avoid making a blocking wait yourself, at least in callbacks, |
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346 | easy (it is often useful to build your own transaction class on top of |
346 | easy (it is often useful to build your own transaction class on top of |
347 | AnyEvent). To subclass, use C<AnyEvent::CondVar> as base class and call |
347 | AnyEvent). To subclass, use C<AnyEvent::CondVar> as base class and call |
348 | it's C<new> method in your own C<new> method. |
348 | it's C<new> method in your own C<new> method. |
349 | |
349 | |
350 | There are two "sides" to a condition variable - the "producer side" which |
350 | There are two "sides" to a condition variable - the "producer side" which |
351 | eventually calls C<< -> broadcast >>, and the "consumer side", which waits |
351 | eventually calls C<< -> send >>, and the "consumer side", which waits |
352 | for the broadcast to occur. |
352 | for the send to occur. |
353 | |
353 | |
354 | Example: |
354 | Example: |
355 | |
355 | |
356 | # wait till the result is ready |
356 | # wait till the result is ready |
357 | my $result_ready = AnyEvent->condvar; |
357 | my $result_ready = AnyEvent->condvar; |
358 | |
358 | |
359 | # do something such as adding a timer |
359 | # do something such as adding a timer |
360 | # or socket watcher the calls $result_ready->broadcast |
360 | # or socket watcher the calls $result_ready->send |
361 | # when the "result" is ready. |
361 | # when the "result" is ready. |
362 | # in this case, we simply use a timer: |
362 | # in this case, we simply use a timer: |
363 | my $w = AnyEvent->timer ( |
363 | my $w = AnyEvent->timer ( |
364 | after => 1, |
364 | after => 1, |
365 | cb => sub { $result_ready->broadcast }, |
365 | cb => sub { $result_ready->send }, |
366 | ); |
366 | ); |
367 | |
367 | |
368 | # this "blocks" (while handling events) till the callback |
368 | # this "blocks" (while handling events) till the callback |
369 | # calls broadcast |
369 | # calls send |
370 | $result_ready->wait; |
370 | $result_ready->wait; |
371 | |
371 | |
372 | =head3 METHODS FOR PRODUCERS |
372 | =head3 METHODS FOR PRODUCERS |
373 | |
373 | |
374 | These methods should only be used by the producing side, i.e. the |
374 | These methods should only be used by the producing side, i.e. the |
375 | code/module that eventually broadcasts the signal. Note that it is also |
375 | code/module that eventually sends the signal. Note that it is also |
376 | the producer side which creates the condvar in most cases, but it isn't |
376 | the producer side which creates the condvar in most cases, but it isn't |
377 | uncommon for the consumer to create it as well. |
377 | uncommon for the consumer to create it as well. |
378 | |
378 | |
379 | =over 4 |
379 | =over 4 |
380 | |
380 | |
381 | =item $cv->broadcast (...) |
381 | =item $cv->send (...) |
382 | |
382 | |
383 | Flag the condition as ready - a running C<< ->wait >> and all further |
383 | Flag the condition as ready - a running C<< ->wait >> and all further |
384 | calls to C<wait> will (eventually) return after this method has been |
384 | calls to C<wait> will (eventually) return after this method has been |
385 | called. If nobody is waiting the broadcast will be remembered. |
385 | called. If nobody is waiting the send will be remembered. |
386 | |
386 | |
387 | If a callback has been set on the condition variable, it is called |
387 | If a callback has been set on the condition variable, it is called |
388 | immediately from within broadcast. |
388 | immediately from within send. |
389 | |
389 | |
390 | Any arguments passed to the C<broadcast> call will be returned by all |
390 | Any arguments passed to the C<send> call will be returned by all |
391 | future C<< ->wait >> calls. |
391 | future C<< ->wait >> calls. |
392 | |
392 | |
393 | =item $cv->croak ($error) |
393 | =item $cv->croak ($error) |
394 | |
394 | |
395 | Similar to broadcast, but causes all call's wait C<< ->wait >> to invoke |
395 | Similar to send, but causes all call's wait C<< ->wait >> to invoke |
396 | C<Carp::croak> with the given error message/object/scalar. |
396 | C<Carp::croak> with the given error message/object/scalar. |
397 | |
397 | |
398 | This can be used to signal any errors to the condition variable |
398 | This can be used to signal any errors to the condition variable |
399 | user/consumer. |
399 | user/consumer. |
400 | |
400 | |
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407 | to use a condition variable for the whole process. |
407 | to use a condition variable for the whole process. |
408 | |
408 | |
409 | Every call to C<< ->begin >> will increment a counter, and every call to |
409 | Every call to C<< ->begin >> will increment a counter, and every call to |
410 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
410 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
411 | >>, the (last) callback passed to C<begin> will be executed. That callback |
411 | >>, the (last) callback passed to C<begin> will be executed. That callback |
412 | is I<supposed> to call C<< ->broadcast >>, but that is not required. If no |
412 | is I<supposed> to call C<< ->send >>, but that is not required. If no |
413 | callback was set, C<broadcast> will be called without any arguments. |
413 | callback was set, C<send> will be called without any arguments. |
414 | |
414 | |
415 | Let's clarify this with the ping example: |
415 | Let's clarify this with the ping example: |
416 | |
416 | |
417 | my $cv = AnyEvent->condvar; |
417 | my $cv = AnyEvent->condvar; |
418 | |
418 | |
419 | my %result; |
419 | my %result; |
420 | $cv->begin (sub { $cv->broadcast (\%result) }); |
420 | $cv->begin (sub { $cv->send (\%result) }); |
421 | |
421 | |
422 | for my $host (@list_of_hosts) { |
422 | for my $host (@list_of_hosts) { |
423 | $cv->begin; |
423 | $cv->begin; |
424 | ping_host_then_call_callback $host, sub { |
424 | ping_host_then_call_callback $host, sub { |
425 | $result{$host} = ...; |
425 | $result{$host} = ...; |
… | |
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428 | } |
428 | } |
429 | |
429 | |
430 | $cv->end; |
430 | $cv->end; |
431 | |
431 | |
432 | This code fragment supposedly pings a number of hosts and calls |
432 | This code fragment supposedly pings a number of hosts and calls |
433 | C<broadcast> after results for all then have have been gathered - in any |
433 | C<send> after results for all then have have been gathered - in any |
434 | order. To achieve this, the code issues a call to C<begin> when it starts |
434 | order. To achieve this, the code issues a call to C<begin> when it starts |
435 | each ping request and calls C<end> when it has received some result for |
435 | each ping request and calls C<end> when it has received some result for |
436 | it. Since C<begin> and C<end> only maintain a counter, the order in which |
436 | it. Since C<begin> and C<end> only maintain a counter, the order in which |
437 | results arrive is not relevant. |
437 | results arrive is not relevant. |
438 | |
438 | |
439 | There is an additional bracketing call to C<begin> and C<end> outside the |
439 | There is an additional bracketing call to C<begin> and C<end> outside the |
440 | loop, which serves two important purposes: first, it sets the callback |
440 | loop, which serves two important purposes: first, it sets the callback |
441 | to be called once the counter reaches C<0>, and second, it ensures that |
441 | to be called once the counter reaches C<0>, and second, it ensures that |
442 | broadcast is called even when C<no> hosts are being pinged (the loop |
442 | C<send> is called even when C<no> hosts are being pinged (the loop |
443 | doesn't execute once). |
443 | doesn't execute once). |
444 | |
444 | |
445 | This is the general pattern when you "fan out" into multiple subrequests: |
445 | This is the general pattern when you "fan out" into multiple subrequests: |
446 | use an outer C<begin>/C<end> pair to set the callback and ensure C<end> |
446 | use an outer C<begin>/C<end> pair to set the callback and ensure C<end> |
447 | is called at least once, and then, for each subrequest you start, call |
447 | is called at least once, and then, for each subrequest you start, call |
… | |
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452 | =head3 METHODS FOR CONSUMERS |
452 | =head3 METHODS FOR CONSUMERS |
453 | |
453 | |
454 | These methods should only be used by the consuming side, i.e. the |
454 | These methods should only be used by the consuming side, i.e. the |
455 | code awaits the condition. |
455 | code awaits the condition. |
456 | |
456 | |
|
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457 | =over 4 |
|
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458 | |
457 | =item $cv->wait |
459 | =item $cv->wait |
458 | |
460 | |
459 | Wait (blocking if necessary) until the C<< ->broadcast >> or C<< ->croak |
461 | Wait (blocking if necessary) until the C<< ->send >> or C<< ->croak |
460 | >> methods have been called on c<$cv>, while servicing other watchers |
462 | >> methods have been called on c<$cv>, while servicing other watchers |
461 | normally. |
463 | normally. |
462 | |
464 | |
463 | You can only wait once on a condition - additional calls are valid but |
465 | You can only wait once on a condition - additional calls are valid but |
464 | will return immediately. |
466 | will return immediately. |
465 | |
467 | |
466 | If an error condition has been set by calling C<< ->croak >>, then this |
468 | If an error condition has been set by calling C<< ->croak >>, then this |
467 | function will call C<croak>. |
469 | function will call C<croak>. |
468 | |
470 | |
469 | In list context, all parameters passed to C<broadcast> will be returned, |
471 | In list context, all parameters passed to C<send> will be returned, |
470 | in scalar context only the first one will be returned. |
472 | in scalar context only the first one will be returned. |
471 | |
473 | |
472 | Not all event models support a blocking wait - some die in that case |
474 | Not all event models support a blocking wait - some die in that case |
473 | (programs might want to do that to stay interactive), so I<if you are |
475 | (programs might want to do that to stay interactive), so I<if you are |
474 | using this from a module, never require a blocking wait>, but let the |
476 | using this from a module, never require a blocking wait>, but let the |
… | |
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478 | while still suppporting blocking waits if the caller so desires). |
480 | while still suppporting blocking waits if the caller so desires). |
479 | |
481 | |
480 | Another reason I<never> to C<< ->wait >> in a module is that you cannot |
482 | Another reason I<never> to C<< ->wait >> in a module is that you cannot |
481 | sensibly have two C<< ->wait >>'s in parallel, as that would require |
483 | sensibly have two C<< ->wait >>'s in parallel, as that would require |
482 | multiple interpreters or coroutines/threads, none of which C<AnyEvent> |
484 | multiple interpreters or coroutines/threads, none of which C<AnyEvent> |
483 | can supply (the coroutine-aware backends L<AnyEvent::Impl::CoroEV> and |
485 | can supply. |
484 | L<AnyEvent::Impl::CoroEvent> explicitly support concurrent C<< ->wait >>'s |
486 | |
485 | from different coroutines, however). |
487 | The L<Coro> module, however, I<can> and I<does> supply coroutines and, in |
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488 | fact, L<Coro::AnyEvent> replaces AnyEvent's condvars by coroutine-safe |
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489 | versions and also integrates coroutines into AnyEvent, making blocking |
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490 | C<< ->wait >> calls perfectly safe as long as they are done from another |
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491 | coroutine (one that doesn't run the event loop). |
486 | |
492 | |
487 | You can ensure that C<< -wait >> never blocks by setting a callback and |
493 | You can ensure that C<< -wait >> never blocks by setting a callback and |
488 | only calling C<< ->wait >> from within that callback (or at a later |
494 | only calling C<< ->wait >> from within that callback (or at a later |
489 | time). This will work even when the event loop does not support blocking |
495 | time). This will work even when the event loop does not support blocking |
490 | waits otherwise. |
496 | waits otherwise. |
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497 | |
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498 | =item $bool = $cv->ready |
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499 | |
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500 | Returns true when the condition is "true", i.e. whether C<send> or |
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501 | C<croak> have been called. |
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502 | |
|
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503 | =item $cb = $cv->cb ([new callback]) |
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504 | |
|
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505 | This is a mutator function that returns the callback set and optionally |
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506 | replaces it before doing so. |
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507 | |
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508 | The callback will be called when the condition becomes "true", i.e. when |
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509 | C<send> or C<croak> are called. Calling C<wait> inside the callback |
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510 | or at any later time is guaranteed not to block. |
491 | |
511 | |
492 | =back |
512 | =back |
493 | |
513 | |
494 | =head1 GLOBAL VARIABLES AND FUNCTIONS |
514 | =head1 GLOBAL VARIABLES AND FUNCTIONS |
495 | |
515 | |
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503 | C<AnyEvent::Impl:xxx> modules, but can be any other class in the case |
523 | C<AnyEvent::Impl:xxx> modules, but can be any other class in the case |
504 | AnyEvent has been extended at runtime (e.g. in I<rxvt-unicode>). |
524 | AnyEvent has been extended at runtime (e.g. in I<rxvt-unicode>). |
505 | |
525 | |
506 | The known classes so far are: |
526 | The known classes so far are: |
507 | |
527 | |
508 | AnyEvent::Impl::CoroEV based on Coro::EV, best choice. |
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|
509 | AnyEvent::Impl::CoroEvent based on Coro::Event, second best choice. |
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510 | AnyEvent::Impl::EV based on EV (an interface to libev, best choice). |
528 | AnyEvent::Impl::EV based on EV (an interface to libev, best choice). |
511 | AnyEvent::Impl::Event based on Event, second best choice. |
529 | AnyEvent::Impl::Event based on Event, second best choice. |
512 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
530 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
513 | AnyEvent::Impl::Glib based on Glib, third-best choice. |
531 | AnyEvent::Impl::Glib based on Glib, third-best choice. |
514 | AnyEvent::Impl::Tk based on Tk, very bad choice. |
532 | AnyEvent::Impl::Tk based on Tk, very bad choice. |
… | |
… | |
531 | Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model |
549 | Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model |
532 | if necessary. You should only call this function right before you would |
550 | if necessary. You should only call this function right before you would |
533 | have created an AnyEvent watcher anyway, that is, as late as possible at |
551 | have created an AnyEvent watcher anyway, that is, as late as possible at |
534 | runtime. |
552 | runtime. |
535 | |
553 | |
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554 | =item $guard = AnyEvent::post_detect { BLOCK } |
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555 | |
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556 | Arranges for the code block to be executed as soon as the event model is |
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557 | autodetected (or immediately if this has already happened). |
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558 | |
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559 | If called in scalar or list context, then it creates and returns an object |
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560 | that automatically removes the callback again when it is destroyed. |
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561 | |
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562 | =item @AnyEvent::post_detect |
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563 | |
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564 | If there are any code references in this array (you can C<push> to it |
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565 | before or after loading AnyEvent), then they will called directly after |
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566 | the event loop has been chosen. |
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567 | |
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568 | You should check C<$AnyEvent::MODEL> before adding to this array, though: |
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569 | if it contains a true value then the event loop has already been detected, |
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570 | and the array will be ignored. |
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571 | |
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572 | Best use C<AnyEvent::post_detect { BLOCK }> instead. |
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573 | |
536 | =back |
574 | =back |
537 | |
575 | |
538 | =head1 WHAT TO DO IN A MODULE |
576 | =head1 WHAT TO DO IN A MODULE |
539 | |
577 | |
540 | As a module author, you should C<use AnyEvent> and call AnyEvent methods |
578 | As a module author, you should C<use AnyEvent> and call AnyEvent methods |
… | |
… | |
544 | decide which event module to use as soon as the first method is called, so |
582 | decide which event module to use as soon as the first method is called, so |
545 | by calling AnyEvent in your module body you force the user of your module |
583 | by calling AnyEvent in your module body you force the user of your module |
546 | to load the event module first. |
584 | to load the event module first. |
547 | |
585 | |
548 | Never call C<< ->wait >> on a condition variable unless you I<know> that |
586 | Never call C<< ->wait >> on a condition variable unless you I<know> that |
549 | the C<< ->broadcast >> method has been called on it already. This is |
587 | the C<< ->send >> method has been called on it already. This is |
550 | because it will stall the whole program, and the whole point of using |
588 | because it will stall the whole program, and the whole point of using |
551 | events is to stay interactive. |
589 | events is to stay interactive. |
552 | |
590 | |
553 | It is fine, however, to call C<< ->wait >> when the user of your module |
591 | It is fine, however, to call C<< ->wait >> when the user of your module |
554 | requests it (i.e. if you create a http request object ad have a method |
592 | requests it (i.e. if you create a http request object ad have a method |
… | |
… | |
628 | |
666 | |
629 | High level API for event-based execution flow control. |
667 | High level API for event-based execution flow control. |
630 | |
668 | |
631 | =item L<Coro> |
669 | =item L<Coro> |
632 | |
670 | |
633 | Has special support for AnyEvent. |
671 | Has special support for AnyEvent via L<Coro::AnyEvent>. |
634 | |
672 | |
635 | =item L<IO::Lambda> |
673 | =item L<IO::Lambda> |
636 | |
674 | |
637 | The lambda approach to I/O - don't ask, look there. Can use AnyEvent. |
675 | The lambda approach to I/O - don't ask, look there. Can use AnyEvent. |
638 | |
676 | |
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655 | no warnings; |
693 | no warnings; |
656 | use strict; |
694 | use strict; |
657 | |
695 | |
658 | use Carp; |
696 | use Carp; |
659 | |
697 | |
660 | our $VERSION = '3.3'; |
698 | our $VERSION = '3.4'; |
661 | our $MODEL; |
699 | our $MODEL; |
662 | |
700 | |
663 | our $AUTOLOAD; |
701 | our $AUTOLOAD; |
664 | our @ISA; |
702 | our @ISA; |
665 | |
703 | |
666 | our $verbose = $ENV{PERL_ANYEVENT_VERBOSE}*1; |
704 | our $verbose = $ENV{PERL_ANYEVENT_VERBOSE}*1; |
667 | |
705 | |
668 | our @REGISTRY; |
706 | our @REGISTRY; |
669 | |
707 | |
670 | my @models = ( |
708 | my @models = ( |
671 | [Coro::EV:: => AnyEvent::Impl::CoroEV::], |
|
|
672 | [Coro::Event:: => AnyEvent::Impl::CoroEvent::], |
|
|
673 | [EV:: => AnyEvent::Impl::EV::], |
709 | [EV:: => AnyEvent::Impl::EV::], |
674 | [Event:: => AnyEvent::Impl::Event::], |
710 | [Event:: => AnyEvent::Impl::Event::], |
675 | [Tk:: => AnyEvent::Impl::Tk::], |
711 | [Tk:: => AnyEvent::Impl::Tk::], |
676 | [Wx:: => AnyEvent::Impl::POE::], |
712 | [Wx:: => AnyEvent::Impl::POE::], |
677 | [Prima:: => AnyEvent::Impl::POE::], |
713 | [Prima:: => AnyEvent::Impl::POE::], |
… | |
… | |
681 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
717 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
682 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
718 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
683 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
719 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
684 | ); |
720 | ); |
685 | |
721 | |
686 | our %method = map +($_ => 1), qw(io timer signal child condvar broadcast wait one_event DESTROY); |
722 | our %method = map +($_ => 1), qw(io timer signal child condvar one_event DESTROY); |
|
|
723 | |
|
|
724 | our @post_detect; |
|
|
725 | |
|
|
726 | sub post_detect(&) { |
|
|
727 | my ($cb) = @_; |
|
|
728 | |
|
|
729 | if ($MODEL) { |
|
|
730 | $cb->(); |
|
|
731 | |
|
|
732 | 1 |
|
|
733 | } else { |
|
|
734 | push @post_detect, $cb; |
|
|
735 | |
|
|
736 | defined wantarray |
|
|
737 | ? bless \$cb, "AnyEvent::Util::Guard" |
|
|
738 | : () |
|
|
739 | } |
|
|
740 | } |
|
|
741 | |
|
|
742 | sub AnyEvent::Util::Guard::DESTROY { |
|
|
743 | @post_detect = grep $_ != ${$_[0]}, @post_detect; |
|
|
744 | } |
687 | |
745 | |
688 | sub detect() { |
746 | sub detect() { |
689 | unless ($MODEL) { |
747 | unless ($MODEL) { |
690 | no strict 'refs'; |
748 | no strict 'refs'; |
691 | |
749 | |
… | |
… | |
725 | last; |
783 | last; |
726 | } |
784 | } |
727 | } |
785 | } |
728 | |
786 | |
729 | $MODEL |
787 | $MODEL |
730 | or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV (or Coro+EV), Event (or Coro+Event) or Glib."; |
788 | or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib."; |
731 | } |
789 | } |
732 | } |
790 | } |
733 | |
791 | |
734 | unshift @ISA, $MODEL; |
792 | unshift @ISA, $MODEL; |
735 | push @{"$MODEL\::ISA"}, "AnyEvent::Base"; |
793 | push @{"$MODEL\::ISA"}, "AnyEvent::Base"; |
|
|
794 | |
|
|
795 | (shift @post_detect)->() while @post_detect; |
736 | } |
796 | } |
737 | |
797 | |
738 | $MODEL |
798 | $MODEL |
739 | } |
799 | } |
740 | |
800 | |
… | |
… | |
1374 | |
1434 | |
1375 | BEGIN { delete $ENV{PERL_ANYEVENT_MODEL} } |
1435 | BEGIN { delete $ENV{PERL_ANYEVENT_MODEL} } |
1376 | |
1436 | |
1377 | use AnyEvent; |
1437 | use AnyEvent; |
1378 | |
1438 | |
|
|
1439 | Similar considerations apply to $ENV{PERL_ANYEVENT_VERBOSE}, as that can |
|
|
1440 | be used to probe what backend is used and gain other information (which is |
|
|
1441 | probably even less useful to an attacker than PERL_ANYEVENT_MODEL). |
|
|
1442 | |
1379 | |
1443 | |
1380 | =head1 SEE ALSO |
1444 | =head1 SEE ALSO |
1381 | |
1445 | |
1382 | Event modules: L<Coro::EV>, L<EV>, L<EV::Glib>, L<Glib::EV>, |
1446 | Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>, |
1383 | L<Coro::Event>, L<Event>, L<Glib::Event>, L<Glib>, L<Coro>, L<Tk>, |
|
|
1384 | L<Event::Lib>, L<Qt>, L<POE>. |
1447 | L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
1385 | |
1448 | |
1386 | Implementations: L<AnyEvent::Impl::CoroEV>, L<AnyEvent::Impl::EV>, |
1449 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
1387 | L<AnyEvent::Impl::CoroEvent>, L<AnyEvent::Impl::Event>, L<AnyEvent::Impl::Glib>, |
1450 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
1388 | L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, L<AnyEvent::Impl::EventLib>, |
1451 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
1389 | L<AnyEvent::Impl::Qt>, L<AnyEvent::Impl::POE>. |
1452 | L<AnyEvent::Impl::POE>. |
|
|
1453 | |
|
|
1454 | Coroutine support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>, |
1390 | |
1455 | |
1391 | Nontrivial usage examples: L<Net::FCP>, L<Net::XMPP2>. |
1456 | Nontrivial usage examples: L<Net::FCP>, L<Net::XMPP2>. |
1392 | |
1457 | |
1393 | |
1458 | |
1394 | =head1 AUTHOR |
1459 | =head1 AUTHOR |