1 | => NAME |
1 | NAME |
2 | AnyEvent - provide framework for multiple event loops |
2 | AnyEvent - provide framework for multiple event loops |
3 | |
3 | |
4 | EV, Event, Glib, Tk, Perl, Event::Lib, Qt, POE - various supported event |
4 | EV, Event, Glib, Tk, Perl, Event::Lib, Qt, POE - various supported event |
5 | loops |
5 | loops |
6 | |
6 | |
7 | SYNOPSIS |
7 | SYNOPSIS |
8 | use AnyEvent; |
8 | use AnyEvent; |
9 | |
9 | |
10 | my $w = AnyEvent->io (fh => $fh, poll => "r|w", cb => sub { |
10 | my $w = AnyEvent->io (fh => $fh, poll => "r|w", cb => sub { ... }); |
11 | ... |
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12 | }); |
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13 | |
11 | |
14 | my $w = AnyEvent->timer (after => $seconds, cb => sub { |
12 | my $w = AnyEvent->timer (after => $seconds, cb => sub { ... }); |
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13 | my $w = AnyEvent->timer (after => $seconds, interval => $seconds, cb => ... |
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14 | |
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15 | print AnyEvent->now; # prints current event loop time |
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16 | print AnyEvent->time; # think Time::HiRes::time or simply CORE::time. |
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17 | |
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18 | my $w = AnyEvent->signal (signal => "TERM", cb => sub { ... }); |
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19 | |
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20 | my $w = AnyEvent->child (pid => $pid, cb => sub { |
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21 | my ($pid, $status) = @_; |
15 | ... |
22 | ... |
16 | }); |
23 | }); |
17 | |
24 | |
18 | my $w = AnyEvent->condvar; # stores whether a condition was flagged |
25 | my $w = AnyEvent->condvar; # stores whether a condition was flagged |
19 | $w->send; # wake up current and all future recv's |
26 | $w->send; # wake up current and all future recv's |
20 | $w->recv; # enters "main loop" till $condvar gets ->send |
27 | $w->recv; # enters "main loop" till $condvar gets ->send |
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28 | # use a condvar in callback mode: |
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29 | $w->cb (sub { $_[0]->recv }); |
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30 | |
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31 | INTRODUCTION/TUTORIAL |
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32 | This manpage is mainly a reference manual. If you are interested in a |
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33 | tutorial or some gentle introduction, have a look at the AnyEvent::Intro |
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34 | manpage. |
21 | |
35 | |
22 | WHY YOU SHOULD USE THIS MODULE (OR NOT) |
36 | WHY YOU SHOULD USE THIS MODULE (OR NOT) |
23 | Glib, POE, IO::Async, Event... CPAN offers event models by the dozen |
37 | Glib, POE, IO::Async, Event... CPAN offers event models by the dozen |
24 | nowadays. So what is different about AnyEvent? |
38 | nowadays. So what is different about AnyEvent? |
25 | |
39 | |
26 | Executive Summary: AnyEvent is *compatible*, AnyEvent is *free of |
40 | Executive Summary: AnyEvent is *compatible*, AnyEvent is *free of |
27 | policy* and AnyEvent is *small and efficient*. |
41 | policy* and AnyEvent is *small and efficient*. |
28 | |
42 | |
29 | First and foremost, *AnyEvent is not an event model* itself, it only |
43 | First and foremost, *AnyEvent is not an event model* itself, it only |
30 | interfaces to whatever event model the main program happens to use in a |
44 | interfaces to whatever event model the main program happens to use, in a |
31 | pragmatic way. For event models and certain classes of immortals alike, |
45 | pragmatic way. For event models and certain classes of immortals alike, |
32 | the statement "there can only be one" is a bitter reality: In general, |
46 | the statement "there can only be one" is a bitter reality: In general, |
33 | only one event loop can be active at the same time in a process. |
47 | only one event loop can be active at the same time in a process. |
34 | AnyEvent helps hiding the differences between those event loops. |
48 | AnyEvent cannot change this, but it can hide the differences between |
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49 | those event loops. |
35 | |
50 | |
36 | The goal of AnyEvent is to offer module authors the ability to do event |
51 | The goal of AnyEvent is to offer module authors the ability to do event |
37 | programming (waiting for I/O or timer events) without subscribing to a |
52 | programming (waiting for I/O or timer events) without subscribing to a |
38 | religion, a way of living, and most importantly: without forcing your |
53 | religion, a way of living, and most importantly: without forcing your |
39 | module users into the same thing by forcing them to use the same event |
54 | module users into the same thing by forcing them to use the same event |
40 | model you use. |
55 | model you use. |
41 | |
56 | |
42 | For modules like POE or IO::Async (which is a total misnomer as it is |
57 | For modules like POE or IO::Async (which is a total misnomer as it is |
43 | actually doing all I/O *synchronously*...), using them in your module is |
58 | actually doing all I/O *synchronously*...), using them in your module is |
44 | like joining a cult: After you joined, you are dependent on them and you |
59 | like joining a cult: After you joined, you are dependent on them and you |
45 | cannot use anything else, as it is simply incompatible to everything |
60 | cannot use anything else, as they are simply incompatible to everything |
46 | that isn't itself. What's worse, all the potential users of your module |
61 | that isn't them. What's worse, all the potential users of your module |
47 | are *also* forced to use the same event loop you use. |
62 | are *also* forced to use the same event loop you use. |
48 | |
63 | |
49 | AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works |
64 | AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works |
50 | fine. AnyEvent + Tk works fine etc. etc. but none of these work together |
65 | fine. AnyEvent + Tk works fine etc. etc. but none of these work together |
51 | with the rest: POE + IO::Async? No go. Tk + Event? No go. Again: if your |
66 | with the rest: POE + IO::Async? No go. Tk + Event? No go. Again: if your |
52 | module uses one of those, every user of your module has to use it, too. |
67 | module uses one of those, every user of your module has to use it, too. |
53 | But if your module uses AnyEvent, it works transparently with all event |
68 | But if your module uses AnyEvent, it works transparently with all event |
54 | models it supports (including stuff like POE and IO::Async, as long as |
69 | models it supports (including stuff like IO::Async, as long as those use |
55 | those use one of the supported event loops. It is trivial to add new |
70 | one of the supported event loops. It is trivial to add new event loops |
56 | event loops to AnyEvent, too, so it is future-proof). |
71 | to AnyEvent, too, so it is future-proof). |
57 | |
72 | |
58 | In addition to being free of having to use *the one and only true event |
73 | In addition to being free of having to use *the one and only true event |
59 | model*, AnyEvent also is free of bloat and policy: with POE or similar |
74 | model*, AnyEvent also is free of bloat and policy: with POE or similar |
60 | modules, you get an enormous amount of code and strict rules you have to |
75 | modules, you get an enormous amount of code and strict rules you have to |
61 | follow. AnyEvent, on the other hand, is lean and up to the point, by |
76 | follow. AnyEvent, on the other hand, is lean and up to the point, by |
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128 | Many watchers either are used with "recursion" (repeating timers for |
143 | Many watchers either are used with "recursion" (repeating timers for |
129 | example), or need to refer to their watcher object in other ways. |
144 | example), or need to refer to their watcher object in other ways. |
130 | |
145 | |
131 | An any way to achieve that is this pattern: |
146 | An any way to achieve that is this pattern: |
132 | |
147 | |
133 | my $w; $w = AnyEvent->type (arg => value ..., cb => sub { |
148 | my $w; $w = AnyEvent->type (arg => value ..., cb => sub { |
134 | # you can use $w here, for example to undef it |
149 | # you can use $w here, for example to undef it |
135 | undef $w; |
150 | undef $w; |
136 | }); |
151 | }); |
137 | |
152 | |
138 | Note that "my $w; $w =" combination. This is necessary because in Perl, |
153 | Note that "my $w; $w =" combination. This is necessary because in Perl, |
139 | my variables are only visible after the statement in which they are |
154 | my variables are only visible after the statement in which they are |
140 | declared. |
155 | declared. |
141 | |
156 | |
142 | I/O WATCHERS |
157 | I/O WATCHERS |
143 | You can create an I/O watcher by calling the "AnyEvent->io" method with |
158 | You can create an I/O watcher by calling the "AnyEvent->io" method with |
144 | the following mandatory key-value pairs as arguments: |
159 | the following mandatory key-value pairs as arguments: |
145 | |
160 | |
146 | "fh" the Perl *file handle* (*not* file descriptor) to watch for events. |
161 | "fh" the Perl *file handle* (*not* file descriptor) to watch for events |
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162 | (AnyEvent might or might not keep a reference to this file handle). |
147 | "poll" must be a string that is either "r" or "w", which creates a |
163 | "poll" must be a string that is either "r" or "w", which creates a |
148 | watcher waiting for "r"eadable or "w"ritable events, respectively. "cb" |
164 | watcher waiting for "r"eadable or "w"ritable events, respectively. "cb" |
149 | is the callback to invoke each time the file handle becomes ready. |
165 | is the callback to invoke each time the file handle becomes ready. |
150 | |
166 | |
151 | Although the callback might get passed parameters, their value and |
167 | Although the callback might get passed parameters, their value and |
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158 | |
174 | |
159 | Some event loops issue spurious readyness notifications, so you should |
175 | Some event loops issue spurious readyness notifications, so you should |
160 | always use non-blocking calls when reading/writing from/to your file |
176 | always use non-blocking calls when reading/writing from/to your file |
161 | handles. |
177 | handles. |
162 | |
178 | |
163 | Example: |
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164 | |
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165 | # wait for readability of STDIN, then read a line and disable the watcher |
179 | Example: wait for readability of STDIN, then read a line and disable the |
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180 | watcher. |
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181 | |
166 | my $w; $w = AnyEvent->io (fh => \*STDIN, poll => 'r', cb => sub { |
182 | my $w; $w = AnyEvent->io (fh => \*STDIN, poll => 'r', cb => sub { |
167 | chomp (my $input = <STDIN>); |
183 | chomp (my $input = <STDIN>); |
168 | warn "read: $input\n"; |
184 | warn "read: $input\n"; |
169 | undef $w; |
185 | undef $w; |
170 | }); |
186 | }); |
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179 | |
195 | |
180 | Although the callback might get passed parameters, their value and |
196 | Although the callback might get passed parameters, their value and |
181 | presence is undefined and you cannot rely on them. Portable AnyEvent |
197 | presence is undefined and you cannot rely on them. Portable AnyEvent |
182 | callbacks cannot use arguments passed to time watcher callbacks. |
198 | callbacks cannot use arguments passed to time watcher callbacks. |
183 | |
199 | |
184 | The timer callback will be invoked at most once: if you want a repeating |
200 | The callback will normally be invoked once only. If you specify another |
185 | timer you have to create a new watcher (this is a limitation by both Tk |
201 | parameter, "interval", as a strictly positive number (> 0), then the |
186 | and Glib). |
202 | callback will be invoked regularly at that interval (in fractional |
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203 | seconds) after the first invocation. If "interval" is specified with a |
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204 | false value, then it is treated as if it were missing. |
187 | |
205 | |
188 | Example: |
206 | The callback will be rescheduled before invoking the callback, but no |
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207 | attempt is done to avoid timer drift in most backends, so the interval |
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208 | is only approximate. |
189 | |
209 | |
190 | # fire an event after 7.7 seconds |
210 | Example: fire an event after 7.7 seconds. |
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211 | |
191 | my $w = AnyEvent->timer (after => 7.7, cb => sub { |
212 | my $w = AnyEvent->timer (after => 7.7, cb => sub { |
192 | warn "timeout\n"; |
213 | warn "timeout\n"; |
193 | }); |
214 | }); |
194 | |
215 | |
195 | # to cancel the timer: |
216 | # to cancel the timer: |
196 | undef $w; |
217 | undef $w; |
197 | |
218 | |
198 | Example 2: |
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199 | |
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200 | # fire an event after 0.5 seconds, then roughly every second |
219 | Example 2: fire an event after 0.5 seconds, then roughly every second. |
201 | my $w; |
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202 | |
220 | |
203 | my $cb = sub { |
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204 | # cancel the old timer while creating a new one |
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205 | $w = AnyEvent->timer (after => 1, cb => $cb); |
221 | my $w = AnyEvent->timer (after => 0.5, interval => 1, cb => sub { |
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222 | warn "timeout\n"; |
206 | }; |
223 | }; |
207 | |
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208 | # start the "loop" by creating the first watcher |
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209 | $w = AnyEvent->timer (after => 0.5, cb => $cb); |
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210 | |
224 | |
211 | TIMING ISSUES |
225 | TIMING ISSUES |
212 | There are two ways to handle timers: based on real time (relative, "fire |
226 | There are two ways to handle timers: based on real time (relative, "fire |
213 | in 10 seconds") and based on wallclock time (absolute, "fire at 12 |
227 | in 10 seconds") and based on wallclock time (absolute, "fire at 12 |
214 | o'clock"). |
228 | o'clock"). |
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290 | the difference between "AnyEvent->time" and "AnyEvent->now" into |
304 | the difference between "AnyEvent->time" and "AnyEvent->now" into |
291 | account. |
305 | account. |
292 | |
306 | |
293 | SIGNAL WATCHERS |
307 | SIGNAL WATCHERS |
294 | You can watch for signals using a signal watcher, "signal" is the signal |
308 | You can watch for signals using a signal watcher, "signal" is the signal |
295 | *name* without any "SIG" prefix, "cb" is the Perl callback to be invoked |
309 | *name* in uppercase and without any "SIG" prefix, "cb" is the Perl |
296 | whenever a signal occurs. |
310 | callback to be invoked whenever a signal occurs. |
297 | |
311 | |
298 | Although the callback might get passed parameters, their value and |
312 | Although the callback might get passed parameters, their value and |
299 | presence is undefined and you cannot rely on them. Portable AnyEvent |
313 | presence is undefined and you cannot rely on them. Portable AnyEvent |
300 | callbacks cannot use arguments passed to signal watcher callbacks. |
314 | callbacks cannot use arguments passed to signal watcher callbacks. |
301 | |
315 | |
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337 | an AnyEvent program, you *have* to create at least one watcher before |
351 | an AnyEvent program, you *have* to create at least one watcher before |
338 | you "fork" the child (alternatively, you can call "AnyEvent::detect"). |
352 | you "fork" the child (alternatively, you can call "AnyEvent::detect"). |
339 | |
353 | |
340 | Example: fork a process and wait for it |
354 | Example: fork a process and wait for it |
341 | |
355 | |
342 | my $done = AnyEvent->condvar; |
356 | my $done = AnyEvent->condvar; |
343 | |
357 | |
344 | my $pid = fork or exit 5; |
358 | my $pid = fork or exit 5; |
345 | |
359 | |
346 | my $w = AnyEvent->child ( |
360 | my $w = AnyEvent->child ( |
347 | pid => $pid, |
361 | pid => $pid, |
348 | cb => sub { |
362 | cb => sub { |
349 | my ($pid, $status) = @_; |
363 | my ($pid, $status) = @_; |
350 | warn "pid $pid exited with status $status"; |
364 | warn "pid $pid exited with status $status"; |
351 | $done->send; |
365 | $done->send; |
352 | }, |
366 | }, |
353 | ); |
367 | ); |
354 | |
368 | |
355 | # do something else, then wait for process exit |
369 | # do something else, then wait for process exit |
356 | $done->recv; |
370 | $done->recv; |
357 | |
371 | |
358 | CONDITION VARIABLES |
372 | CONDITION VARIABLES |
359 | If you are familiar with some event loops you will know that all of them |
373 | If you are familiar with some event loops you will know that all of them |
360 | require you to run some blocking "loop", "run" or similar function that |
374 | require you to run some blocking "loop", "run" or similar function that |
361 | will actively watch for new events and call your callbacks. |
375 | will actively watch for new events and call your callbacks. |
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366 | The instrument to do that is called a "condition variable", so called |
380 | The instrument to do that is called a "condition variable", so called |
367 | because they represent a condition that must become true. |
381 | because they represent a condition that must become true. |
368 | |
382 | |
369 | Condition variables can be created by calling the "AnyEvent->condvar" |
383 | Condition variables can be created by calling the "AnyEvent->condvar" |
370 | method, usually without arguments. The only argument pair allowed is |
384 | method, usually without arguments. The only argument pair allowed is |
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385 | |
371 | "cb", which specifies a callback to be called when the condition |
386 | "cb", which specifies a callback to be called when the condition |
372 | variable becomes true. |
387 | variable becomes true, with the condition variable as the first argument |
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388 | (but not the results). |
373 | |
389 | |
374 | After creation, the condition variable is "false" until it becomes |
390 | After creation, the condition variable is "false" until it becomes |
375 | "true" by calling the "send" method (or calling the condition variable |
391 | "true" by calling the "send" method (or calling the condition variable |
376 | as if it were a callback, read about the caveats in the description for |
392 | as if it were a callback, read about the caveats in the description for |
377 | the "->send" method). |
393 | the "->send" method). |
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433 | |
449 | |
434 | my $done = AnyEvent->condvar; |
450 | my $done = AnyEvent->condvar; |
435 | my $delay = AnyEvent->timer (after => 5, cb => $done); |
451 | my $delay = AnyEvent->timer (after => 5, cb => $done); |
436 | $done->recv; |
452 | $done->recv; |
437 | |
453 | |
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454 | Example: Imagine an API that returns a condvar and doesn't support |
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455 | callbacks. This is how you make a synchronous call, for example from the |
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456 | main program: |
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457 | |
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458 | use AnyEvent::CouchDB; |
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459 | |
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460 | ... |
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461 | |
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462 | my @info = $couchdb->info->recv; |
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463 | |
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464 | And this is how you would just ste a callback to be called whenever the |
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465 | results are available: |
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466 | |
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467 | $couchdb->info->cb (sub { |
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468 | my @info = $_[0]->recv; |
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469 | }); |
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470 | |
438 | METHODS FOR PRODUCERS |
471 | METHODS FOR PRODUCERS |
439 | These methods should only be used by the producing side, i.e. the |
472 | These methods should only be used by the producing side, i.e. the |
440 | code/module that eventually sends the signal. Note that it is also the |
473 | code/module that eventually sends the signal. Note that it is also the |
441 | producer side which creates the condvar in most cases, but it isn't |
474 | producer side which creates the condvar in most cases, but it isn't |
442 | uncommon for the consumer to create it as well. |
475 | uncommon for the consumer to create it as well. |
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562 | |
595 | |
563 | $bool = $cv->ready |
596 | $bool = $cv->ready |
564 | Returns true when the condition is "true", i.e. whether "send" or |
597 | Returns true when the condition is "true", i.e. whether "send" or |
565 | "croak" have been called. |
598 | "croak" have been called. |
566 | |
599 | |
567 | $cb = $cv->cb ([new callback]) |
600 | $cb = $cv->cb ($cb->($cv)) |
568 | This is a mutator function that returns the callback set and |
601 | This is a mutator function that returns the callback set and |
569 | optionally replaces it before doing so. |
602 | optionally replaces it before doing so. |
570 | |
603 | |
571 | The callback will be called when the condition becomes "true", i.e. |
604 | The callback will be called when the condition becomes "true", i.e. |
572 | when "send" or "croak" are called. Calling "recv" inside the |
605 | when "send" or "croak" are called, with the only argument being the |
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606 | condition variable itself. Calling "recv" inside the callback or at |
573 | callback or at any later time is guaranteed not to block. |
607 | any later time is guaranteed not to block. |
574 | |
608 | |
575 | GLOBAL VARIABLES AND FUNCTIONS |
609 | GLOBAL VARIABLES AND FUNCTIONS |
576 | $AnyEvent::MODEL |
610 | $AnyEvent::MODEL |
577 | Contains "undef" until the first watcher is being created. Then it |
611 | Contains "undef" until the first watcher is being created. Then it |
578 | contains the event model that is being used, which is the name of |
612 | contains the event model that is being used, which is the name of |
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692 | AnyEvent::Util |
726 | AnyEvent::Util |
693 | Contains various utility functions that replace often-used but |
727 | Contains various utility functions that replace often-used but |
694 | blocking functions such as "inet_aton" by event-/callback-based |
728 | blocking functions such as "inet_aton" by event-/callback-based |
695 | versions. |
729 | versions. |
696 | |
730 | |
697 | AnyEvent::Handle |
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698 | Provide read and write buffers and manages watchers for reads and |
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699 | writes. |
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700 | |
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701 | AnyEvent::Socket |
731 | AnyEvent::Socket |
702 | Provides various utility functions for (internet protocol) sockets, |
732 | Provides various utility functions for (internet protocol) sockets, |
703 | addresses and name resolution. Also functions to create non-blocking |
733 | addresses and name resolution. Also functions to create non-blocking |
704 | tcp connections or tcp servers, with IPv6 and SRV record support and |
734 | tcp connections or tcp servers, with IPv6 and SRV record support and |
705 | more. |
735 | more. |
706 | |
736 | |
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737 | AnyEvent::Handle |
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738 | Provide read and write buffers, manages watchers for reads and |
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739 | writes, supports raw and formatted I/O, I/O queued and fully |
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740 | transparent and non-blocking SSL/TLS. |
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741 | |
707 | AnyEvent::DNS |
742 | AnyEvent::DNS |
708 | Provides rich asynchronous DNS resolver capabilities. |
743 | Provides rich asynchronous DNS resolver capabilities. |
709 | |
744 | |
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745 | AnyEvent::HTTP |
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746 | A simple-to-use HTTP library that is capable of making a lot of |
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747 | concurrent HTTP requests. |
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748 | |
710 | AnyEvent::HTTPD |
749 | AnyEvent::HTTPD |
711 | Provides a simple web application server framework. |
750 | Provides a simple web application server framework. |
712 | |
751 | |
713 | AnyEvent::FastPing |
752 | AnyEvent::FastPing |
714 | The fastest ping in the west. |
753 | The fastest ping in the west. |
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754 | |
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755 | AnyEvent::DBI |
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756 | Executes DBI requests asynchronously in a proxy process. |
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757 | |
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758 | AnyEvent::AIO |
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759 | Truly asynchronous I/O, should be in the toolbox of every event |
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760 | programmer. AnyEvent::AIO transparently fuses IO::AIO and AnyEvent |
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761 | together. |
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762 | |
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763 | AnyEvent::BDB |
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764 | Truly asynchronous Berkeley DB access. AnyEvent::BDB transparently |
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765 | fuses BDB and AnyEvent together. |
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766 | |
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767 | AnyEvent::GPSD |
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768 | A non-blocking interface to gpsd, a daemon delivering GPS |
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769 | information. |
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770 | |
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771 | AnyEvent::IGS |
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772 | A non-blocking interface to the Internet Go Server protocol (used by |
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773 | App::IGS). |
715 | |
774 | |
716 | Net::IRC3 |
775 | Net::IRC3 |
717 | AnyEvent based IRC client module family. |
776 | AnyEvent based IRC client module family. |
718 | |
777 | |
719 | Net::XMPP2 |
778 | Net::XMPP2 |
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726 | Event::ExecFlow |
785 | Event::ExecFlow |
727 | High level API for event-based execution flow control. |
786 | High level API for event-based execution flow control. |
728 | |
787 | |
729 | Coro |
788 | Coro |
730 | Has special support for AnyEvent via Coro::AnyEvent. |
789 | Has special support for AnyEvent via Coro::AnyEvent. |
731 | |
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732 | AnyEvent::AIO, IO::AIO |
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733 | Truly asynchronous I/O, should be in the toolbox of every event |
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734 | programmer. AnyEvent::AIO transparently fuses IO::AIO and AnyEvent |
|
|
735 | together. |
|
|
736 | |
|
|
737 | AnyEvent::BDB, BDB |
|
|
738 | Truly asynchronous Berkeley DB access. AnyEvent::AIO transparently |
|
|
739 | fuses IO::AIO and AnyEvent together. |
|
|
740 | |
790 | |
741 | IO::Lambda |
791 | IO::Lambda |
742 | The lambda approach to I/O - don't ask, look there. Can use |
792 | The lambda approach to I/O - don't ask, look there. Can use |
743 | AnyEvent. |
793 | AnyEvent. |
744 | |
794 | |
… | |
… | |
797 | conditions, such as not being able to load the event model specified |
847 | conditions, such as not being able to load the event model specified |
798 | by "PERL_ANYEVENT_MODEL". |
848 | by "PERL_ANYEVENT_MODEL". |
799 | |
849 | |
800 | When set to 2 or higher, cause AnyEvent to report to STDERR which |
850 | When set to 2 or higher, cause AnyEvent to report to STDERR which |
801 | event model it chooses. |
851 | event model it chooses. |
|
|
852 | |
|
|
853 | "PERL_ANYEVENT_STRICT" |
|
|
854 | AnyEvent does not do much argument checking by default, as thorough |
|
|
855 | argument checking is very costly. Setting this variable to a true |
|
|
856 | value will cause AnyEvent to load "AnyEvent::Strict" and then to |
|
|
857 | thoroughly check the arguments passed to most method calls. If it |
|
|
858 | finds any problems it will croak. |
|
|
859 | |
|
|
860 | In other words, enables "strict" mode. |
|
|
861 | |
|
|
862 | Unlike "use strict" it is definitely recommended ot keep it off in |
|
|
863 | production. |
802 | |
864 | |
803 | "PERL_ANYEVENT_MODEL" |
865 | "PERL_ANYEVENT_MODEL" |
804 | This can be used to specify the event model to be used by AnyEvent, |
866 | This can be used to specify the event model to be used by AnyEvent, |
805 | before auto detection and -probing kicks in. It must be a string |
867 | before auto detection and -probing kicks in. It must be a string |
806 | consisting entirely of ASCII letters. The string "AnyEvent::Impl::" |
868 | consisting entirely of ASCII letters. The string "AnyEvent::Impl::" |
… | |
… | |
811 | This functionality might change in future versions. |
873 | This functionality might change in future versions. |
812 | |
874 | |
813 | For example, to force the pure perl model (AnyEvent::Impl::Perl) you |
875 | For example, to force the pure perl model (AnyEvent::Impl::Perl) you |
814 | could start your program like this: |
876 | could start your program like this: |
815 | |
877 | |
816 | PERL_ANYEVENT_MODEL=Perl perl ... |
878 | PERL_ANYEVENT_MODEL=Perl perl ... |
817 | |
879 | |
818 | "PERL_ANYEVENT_PROTOCOLS" |
880 | "PERL_ANYEVENT_PROTOCOLS" |
819 | Used by both AnyEvent::DNS and AnyEvent::Socket to determine |
881 | Used by both AnyEvent::DNS and AnyEvent::Socket to determine |
820 | preferences for IPv4 or IPv6. The default is unspecified (and might |
882 | preferences for IPv4 or IPv6. The default is unspecified (and might |
821 | change, or be the result of auto probing). |
883 | change, or be the result of auto probing). |
… | |
… | |
1262 | model than specified in the variable. |
1324 | model than specified in the variable. |
1263 | |
1325 | |
1264 | You can make AnyEvent completely ignore this variable by deleting it |
1326 | You can make AnyEvent completely ignore this variable by deleting it |
1265 | before the first watcher gets created, e.g. with a "BEGIN" block: |
1327 | before the first watcher gets created, e.g. with a "BEGIN" block: |
1266 | |
1328 | |
1267 | BEGIN { delete $ENV{PERL_ANYEVENT_MODEL} } |
1329 | BEGIN { delete $ENV{PERL_ANYEVENT_MODEL} } |
1268 | |
1330 | |
1269 | use AnyEvent; |
1331 | use AnyEvent; |
1270 | |
1332 | |
1271 | Similar considerations apply to $ENV{PERL_ANYEVENT_VERBOSE}, as that can |
1333 | Similar considerations apply to $ENV{PERL_ANYEVENT_VERBOSE}, as that can |
1272 | be used to probe what backend is used and gain other information (which |
1334 | be used to probe what backend is used and gain other information (which |
1273 | is probably even less useful to an attacker than PERL_ANYEVENT_MODEL). |
1335 | is probably even less useful to an attacker than PERL_ANYEVENT_MODEL), |
|
|
1336 | and $ENV{PERL_ANYEGENT_STRICT}. |
|
|
1337 | |
|
|
1338 | BUGS |
|
|
1339 | Perl 5.8 has numerous memleaks that sometimes hit this module and are |
|
|
1340 | hard to work around. If you suffer from memleaks, first upgrade to Perl |
|
|
1341 | 5.10 and check wether the leaks still show up. (Perl 5.10.0 has other |
|
|
1342 | annoying mamleaks, such as leaking on "map" and "grep" but it is usually |
|
|
1343 | not as pronounced). |
1274 | |
1344 | |
1275 | SEE ALSO |
1345 | SEE ALSO |
1276 | Utility functions: AnyEvent::Util. |
1346 | Utility functions: AnyEvent::Util. |
1277 | |
1347 | |
1278 | Event modules: EV, EV::Glib, Glib::EV, Event, Glib::Event, Glib, Tk, |
1348 | Event modules: EV, EV::Glib, Glib::EV, Event, Glib::Event, Glib, Tk, |
… | |
… | |
1290 | Coroutine support: Coro, Coro::AnyEvent, Coro::EV, Coro::Event, |
1360 | Coroutine support: Coro, Coro::AnyEvent, Coro::EV, Coro::Event, |
1291 | |
1361 | |
1292 | Nontrivial usage examples: Net::FCP, Net::XMPP2, AnyEvent::DNS. |
1362 | Nontrivial usage examples: Net::FCP, Net::XMPP2, AnyEvent::DNS. |
1293 | |
1363 | |
1294 | AUTHOR |
1364 | AUTHOR |
1295 | Marc Lehmann <schmorp@schmorp.de> |
1365 | Marc Lehmann <schmorp@schmorp.de> |
1296 | http://home.schmorp.de/ |
1366 | http://home.schmorp.de/ |
1297 | |
1367 | |