… | |
… | |
39 | |
39 | |
40 | my $w = EV::child 666, sub { |
40 | my $w = EV::child 666, sub { |
41 | my ($w, $revents) = @_; |
41 | my ($w, $revents) = @_; |
42 | my $status = $w->rstatus; |
42 | my $status = $w->rstatus; |
43 | }; |
43 | }; |
|
|
44 | |
|
|
45 | # STAT CHANGES |
|
|
46 | my $w = EV::stat "/etc/passwd", 10, sub { |
|
|
47 | my ($w, $revents) = @_; |
|
|
48 | warn $w->path, " has changed somehow.\n"; |
|
|
49 | }; |
44 | |
50 | |
45 | # MAINLOOP |
51 | # MAINLOOP |
46 | EV::loop; # loop until EV::unloop is called or all watchers stop |
52 | EV::loop; # loop until EV::unloop is called or all watchers stop |
47 | EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled |
53 | EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled |
48 | EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block |
54 | EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block |
49 | |
55 | |
50 | =head1 DESCRIPTION |
56 | =head1 DESCRIPTION |
51 | |
57 | |
52 | This module provides an interface to libev |
58 | This module provides an interface to libev |
53 | (L<http://software.schmorp.de/pkg/libev.html>). |
59 | (L<http://software.schmorp.de/pkg/libev.html>). While the documentation |
|
|
60 | below is comprehensive, one might also consult the documentation of libev |
|
|
61 | itself (L<http://cvs.schmorp.de/libev/ev.html>) for more subtle details on |
|
|
62 | watcher semantics or some discussion on the available backends, or how to |
|
|
63 | force a specific backend with C<LIBEV_FLAGS>. |
54 | |
64 | |
55 | =cut |
65 | =cut |
56 | |
66 | |
57 | package EV; |
67 | package EV; |
58 | |
68 | |
59 | use strict; |
69 | use strict; |
60 | |
70 | |
61 | BEGIN { |
71 | BEGIN { |
62 | our $VERSION = '1.2'; |
72 | our $VERSION = '1.6'; |
63 | use XSLoader; |
73 | use XSLoader; |
64 | XSLoader::load "EV", $VERSION; |
74 | XSLoader::load "EV", $VERSION; |
65 | } |
75 | } |
66 | |
76 | |
67 | @EV::IO::ISA = |
77 | @EV::IO::ISA = |
68 | @EV::Timer::ISA = |
78 | @EV::Timer::ISA = |
69 | @EV::Periodic::ISA = |
79 | @EV::Periodic::ISA = |
70 | @EV::Signal::ISA = |
80 | @EV::Signal::ISA = |
|
|
81 | @EV::Child::ISA = |
|
|
82 | @EV::Stat::ISA = |
71 | @EV::Idle::ISA = |
83 | @EV::Idle::ISA = |
72 | @EV::Prepare::ISA = |
84 | @EV::Prepare::ISA = |
73 | @EV::Check::ISA = |
85 | @EV::Check::ISA = |
74 | @EV::Child::ISA = "EV::Watcher"; |
86 | @EV::Embed::ISA = |
|
|
87 | @EV::Fork::ISA = |
|
|
88 | "EV::Watcher"; |
75 | |
89 | |
76 | =head1 BASIC INTERFACE |
90 | =head1 BASIC INTERFACE |
77 | |
91 | |
78 | =over 4 |
92 | =over 4 |
79 | |
93 | |
… | |
… | |
116 | When called with no arguments or an argument of EV::UNLOOP_ONE, makes the |
130 | When called with no arguments or an argument of EV::UNLOOP_ONE, makes the |
117 | innermost call to EV::loop return. |
131 | innermost call to EV::loop return. |
118 | |
132 | |
119 | When called with an argument of EV::UNLOOP_ALL, all calls to EV::loop will return as |
133 | When called with an argument of EV::UNLOOP_ALL, all calls to EV::loop will return as |
120 | fast as possible. |
134 | fast as possible. |
|
|
135 | |
|
|
136 | =item $count = EV::loop_count |
|
|
137 | |
|
|
138 | Return the number of times the event loop has polled for new |
|
|
139 | events. Sometiems useful as a generation counter. |
121 | |
140 | |
122 | =item EV::once $fh_or_undef, $events, $timeout, $cb->($revents) |
141 | =item EV::once $fh_or_undef, $events, $timeout, $cb->($revents) |
123 | |
142 | |
124 | This function rolls together an I/O and a timer watcher for a single |
143 | This function rolls together an I/O and a timer watcher for a single |
125 | one-shot event without the need for managing a watcher object. |
144 | one-shot event without the need for managing a watcher object. |
… | |
… | |
142 | of them triggers, then they will be stopped and freed, and the callback |
161 | of them triggers, then they will be stopped and freed, and the callback |
143 | invoked. |
162 | invoked. |
144 | |
163 | |
145 | =back |
164 | =back |
146 | |
165 | |
147 | =head2 WATCHER |
166 | =head2 WATCHER OBJECTS |
148 | |
167 | |
149 | A watcher is an object that gets created to record your interest in some |
168 | A watcher is an object that gets created to record your interest in some |
150 | event. For instance, if you want to wait for STDIN to become readable, you |
169 | event. For instance, if you want to wait for STDIN to become readable, you |
151 | would create an EV::io watcher for that: |
170 | would create an EV::io watcher for that: |
152 | |
171 | |
… | |
… | |
177 | |
196 | |
178 | Also, all methods changing some aspect of a watcher (->set, ->priority, |
197 | Also, all methods changing some aspect of a watcher (->set, ->priority, |
179 | ->fh and so on) automatically stop and start it again if it is active, |
198 | ->fh and so on) automatically stop and start it again if it is active, |
180 | which means pending events get lost. |
199 | which means pending events get lost. |
181 | |
200 | |
182 | =head2 WATCHER TYPES |
201 | =head2 COMMON WATCHER METHODS |
183 | |
202 | |
184 | Now lets move to the existing watcher types and asociated methods. |
203 | This section lists methods common to all watchers. |
185 | |
|
|
186 | The following methods are available for all watchers. Then followes a |
|
|
187 | description of each watcher constructor (EV::io, EV::timer, EV::periodic, |
|
|
188 | EV::signal, EV::child, EV::idle, EV::prepare and EV::check), followed by |
|
|
189 | any type-specific methods (if any). |
|
|
190 | |
204 | |
191 | =over 4 |
205 | =over 4 |
192 | |
206 | |
193 | =item $w->start |
207 | =item $w->start |
194 | |
208 | |
… | |
… | |
270 | |
284 | |
271 | my $udp_socket = ... |
285 | my $udp_socket = ... |
272 | my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... }; |
286 | my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... }; |
273 | $udp_watcher->keepalive (0); |
287 | $udp_watcher->keepalive (0); |
274 | |
288 | |
|
|
289 | =back |
|
|
290 | |
|
|
291 | |
|
|
292 | =head2 WATCHER TYPES |
|
|
293 | |
|
|
294 | Each of the following subsections describes a single watcher type. |
|
|
295 | |
|
|
296 | =head3 IO WATCHERS - is this file descriptor readable or writable? |
|
|
297 | |
|
|
298 | =over 4 |
|
|
299 | |
275 | =item $w = EV::io $fileno_or_fh, $eventmask, $callback |
300 | =item $w = EV::io $fileno_or_fh, $eventmask, $callback |
276 | |
301 | |
277 | =item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback |
302 | =item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback |
278 | |
303 | |
279 | As long as the returned watcher object is alive, call the C<$callback> |
304 | As long as the returned watcher object is alive, call the C<$callback> |
280 | when the events specified in C<$eventmask>. |
305 | when at least one of events specified in C<$eventmask> occurs. |
281 | |
306 | |
282 | The $eventmask can be one or more of these constants ORed together: |
307 | The $eventmask can be one or more of these constants ORed together: |
283 | |
308 | |
284 | EV::READ wait until read() wouldn't block anymore |
309 | EV::READ wait until read() wouldn't block anymore |
285 | EV::WRITE wait until write() wouldn't block anymore |
310 | EV::WRITE wait until write() wouldn't block anymore |
… | |
… | |
301 | |
326 | |
302 | =item $old_eventmask = $w->events ($new_eventmask) |
327 | =item $old_eventmask = $w->events ($new_eventmask) |
303 | |
328 | |
304 | Returns the previously set event mask and optionally set a new one. |
329 | Returns the previously set event mask and optionally set a new one. |
305 | |
330 | |
|
|
331 | =back |
|
|
332 | |
|
|
333 | |
|
|
334 | =head3 TIMER WATCHERS - relative and optionally repeating timeouts |
|
|
335 | |
|
|
336 | =over 4 |
306 | |
337 | |
307 | =item $w = EV::timer $after, $repeat, $callback |
338 | =item $w = EV::timer $after, $repeat, $callback |
308 | |
339 | |
309 | =item $w = EV::timer_ns $after, $repeat, $callback |
340 | =item $w = EV::timer_ns $after, $repeat, $callback |
310 | |
341 | |
311 | Calls the callback after C<$after> seconds. If C<$repeat> is non-zero, |
342 | Calls the callback after C<$after> seconds (which may be fractional). If |
312 | the timer will be restarted (with the $repeat value as $after) after the |
343 | C<$repeat> is non-zero, the timer will be restarted (with the $repeat |
313 | callback returns. |
344 | value as $after) after the callback returns. |
314 | |
345 | |
315 | This means that the callback would be called roughly after C<$after> |
346 | This means that the callback would be called roughly after C<$after> |
316 | seconds, and then every C<$repeat> seconds. The timer does his best not |
347 | seconds, and then every C<$repeat> seconds. The timer does his best not |
317 | to drift, but it will not invoke the timer more often then once per event |
348 | to drift, but it will not invoke the timer more often then once per event |
318 | loop iteration, and might drift in other cases. If that isn't acceptable, |
349 | loop iteration, and might drift in other cases. If that isn't acceptable, |
… | |
… | |
324 | |
355 | |
325 | The C<timer_ns> variant doesn't start (activate) the newly created watcher. |
356 | The C<timer_ns> variant doesn't start (activate) the newly created watcher. |
326 | |
357 | |
327 | =item $w->set ($after, $repeat) |
358 | =item $w->set ($after, $repeat) |
328 | |
359 | |
329 | Reconfigures the watcher, see the constructor above for details. Can be at |
360 | Reconfigures the watcher, see the constructor above for details. Can be called at |
330 | any time. |
361 | any time. |
331 | |
362 | |
332 | =item $w->again |
363 | =item $w->again |
333 | |
364 | |
334 | Similar to the C<start> method, but has special semantics for repeating timers: |
365 | Similar to the C<start> method, but has special semantics for repeating timers: |
… | |
… | |
345 | This behaviour is useful when you have a timeout for some IO |
376 | This behaviour is useful when you have a timeout for some IO |
346 | operation. You create a timer object with the same value for C<$after> and |
377 | operation. You create a timer object with the same value for C<$after> and |
347 | C<$repeat>, and then, in the read/write watcher, run the C<again> method |
378 | C<$repeat>, and then, in the read/write watcher, run the C<again> method |
348 | on the timeout. |
379 | on the timeout. |
349 | |
380 | |
|
|
381 | =back |
|
|
382 | |
|
|
383 | |
|
|
384 | =head3 PERIODIC WATCHERS - to cron or not to cron? |
|
|
385 | |
|
|
386 | =over 4 |
350 | |
387 | |
351 | =item $w = EV::periodic $at, $interval, $reschedule_cb, $callback |
388 | =item $w = EV::periodic $at, $interval, $reschedule_cb, $callback |
352 | |
389 | |
353 | =item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback |
390 | =item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback |
354 | |
391 | |
… | |
… | |
426 | |
463 | |
427 | The C<periodic_ns> variant doesn't start (activate) the newly created watcher. |
464 | The C<periodic_ns> variant doesn't start (activate) the newly created watcher. |
428 | |
465 | |
429 | =item $w->set ($at, $interval, $reschedule_cb) |
466 | =item $w->set ($at, $interval, $reschedule_cb) |
430 | |
467 | |
431 | Reconfigures the watcher, see the constructor above for details. Can be at |
468 | Reconfigures the watcher, see the constructor above for details. Can be called at |
432 | any time. |
469 | any time. |
433 | |
470 | |
434 | =item $w->again |
471 | =item $w->again |
435 | |
472 | |
436 | Simply stops and starts the watcher again. |
473 | Simply stops and starts the watcher again. |
437 | |
474 | |
|
|
475 | =back |
|
|
476 | |
|
|
477 | |
|
|
478 | =head3 SIGNAL WATCHERS - signal me when a signal gets signalled! |
|
|
479 | |
|
|
480 | =over 4 |
438 | |
481 | |
439 | =item $w = EV::signal $signal, $callback |
482 | =item $w = EV::signal $signal, $callback |
440 | |
483 | |
441 | =item $w = EV::signal_ns $signal, $callback |
484 | =item $w = EV::signal_ns $signal, $callback |
442 | |
485 | |
443 | Call the callback when $signal is received (the signal can be specified |
486 | Call the callback when $signal is received (the signal can be specified by |
444 | by number or by name, just as with kill or %SIG). |
487 | number or by name, just as with C<kill> or C<%SIG>). |
445 | |
488 | |
446 | EV will grab the signal for the process (the kernel only allows one |
489 | EV will grab the signal for the process (the kernel only allows one |
447 | component to receive a signal at a time) when you start a signal watcher, |
490 | component to receive a signal at a time) when you start a signal watcher, |
448 | and removes it again when you stop it. Perl does the same when you |
491 | and removes it again when you stop it. Perl does the same when you |
449 | add/remove callbacks to %SIG, so watch out. |
492 | add/remove callbacks to C<%SIG>, so watch out. |
450 | |
493 | |
451 | You can have as many signal watchers per signal as you want. |
494 | You can have as many signal watchers per signal as you want. |
452 | |
495 | |
453 | The C<signal_ns> variant doesn't start (activate) the newly created watcher. |
496 | The C<signal_ns> variant doesn't start (activate) the newly created watcher. |
454 | |
497 | |
455 | =item $w->set ($signal) |
498 | =item $w->set ($signal) |
456 | |
499 | |
457 | Reconfigures the watcher, see the constructor above for details. Can be at |
500 | Reconfigures the watcher, see the constructor above for details. Can be |
458 | any time. |
501 | called at any time. |
459 | |
502 | |
460 | =item $current_signum = $w->signal |
503 | =item $current_signum = $w->signal |
461 | |
504 | |
462 | =item $old_signum = $w->signal ($new_signal) |
505 | =item $old_signum = $w->signal ($new_signal) |
463 | |
506 | |
464 | Returns the previously set signal (always as a number not name) and |
507 | Returns the previously set signal (always as a number not name) and |
465 | optionally set a new one. |
508 | optionally set a new one. |
466 | |
509 | |
|
|
510 | =back |
|
|
511 | |
|
|
512 | |
|
|
513 | =head3 CHILD WATCHERS - watch out for process status changes |
|
|
514 | |
|
|
515 | =over 4 |
467 | |
516 | |
468 | =item $w = EV::child $pid, $callback |
517 | =item $w = EV::child $pid, $callback |
469 | |
518 | |
470 | =item $w = EV::child_ns $pid, $callback |
519 | =item $w = EV::child_ns $pid, $callback |
471 | |
520 | |
472 | Call the callback when a status change for pid C<$pid> (or any pid |
521 | Call the callback when a status change for pid C<$pid> (or any pid if |
473 | if C<$pid> is 0) has been received. More precisely: when the process |
522 | C<$pid> is 0) has been received. More precisely: when the process receives |
474 | receives a SIGCHLD, EV will fetch the outstanding exit/wait status for all |
523 | a C<SIGCHLD>, EV will fetch the outstanding exit/wait status for all |
475 | changed/zombie children and call the callback. |
524 | changed/zombie children and call the callback. |
476 | |
525 | |
477 | You can access both status and pid by using the C<rstatus> and C<rpid> |
526 | It is valid (and fully supported) to install a child watcher after a child |
478 | methods on the watcher object. |
527 | has exited but before the event loop has started its next iteration (for |
|
|
528 | example, first you C<fork>, then the new child process might exit, and |
|
|
529 | only then do you install a child watcher in the parent for the new pid). |
479 | |
530 | |
|
|
531 | You can access both exit (or tracing) status and pid by using the |
|
|
532 | C<rstatus> and C<rpid> methods on the watcher object. |
|
|
533 | |
480 | You can have as many pid watchers per pid as you want. |
534 | You can have as many pid watchers per pid as you want, they will all be |
|
|
535 | called. |
481 | |
536 | |
482 | The C<child_ns> variant doesn't start (activate) the newly created watcher. |
537 | The C<child_ns> variant doesn't start (activate) the newly created watcher. |
483 | |
538 | |
484 | =item $w->set ($pid) |
539 | =item $w->set ($pid) |
485 | |
540 | |
486 | Reconfigures the watcher, see the constructor above for details. Can be at |
541 | Reconfigures the watcher, see the constructor above for details. Can be called at |
487 | any time. |
542 | any time. |
488 | |
543 | |
489 | =item $current_pid = $w->pid |
544 | =item $current_pid = $w->pid |
490 | |
545 | |
491 | =item $old_pid = $w->pid ($new_pid) |
546 | =item $old_pid = $w->pid ($new_pid) |
… | |
… | |
500 | =item $pid = $w->rpid |
555 | =item $pid = $w->rpid |
501 | |
556 | |
502 | Return the pid of the awaited child (useful when you have installed a |
557 | Return the pid of the awaited child (useful when you have installed a |
503 | watcher for all pids). |
558 | watcher for all pids). |
504 | |
559 | |
|
|
560 | =back |
|
|
561 | |
|
|
562 | |
|
|
563 | =head3 STAT WATCHERS - did the file attributes just change? |
|
|
564 | |
|
|
565 | =over 4 |
|
|
566 | |
|
|
567 | =item $w = EV::stat $path, $interval, $callback |
|
|
568 | |
|
|
569 | =item $w = EV::stat_ns $path, $interval, $callback |
|
|
570 | |
|
|
571 | Call the callback when a file status change has been detected on |
|
|
572 | C<$path>. The C<$path> does not need to exist, changing from "path exists" |
|
|
573 | to "path does not exist" is a status change like any other. |
|
|
574 | |
|
|
575 | The C<$interval> is a recommended polling interval for systems where |
|
|
576 | OS-supported change notifications don't exist or are not supported. If |
|
|
577 | you use C<0> then an unspecified default is used (which is highly |
|
|
578 | recommended!), which is to be expected to be around five seconds usually. |
|
|
579 | |
|
|
580 | This watcher type is not meant for massive numbers of stat watchers, |
|
|
581 | as even with OS-supported change notifications, this can be |
|
|
582 | resource-intensive. |
|
|
583 | |
|
|
584 | The C<stat_ns> variant doesn't start (activate) the newly created watcher. |
|
|
585 | |
|
|
586 | =item ... = $w->stat |
|
|
587 | |
|
|
588 | This call is very similar to the perl C<stat> built-in: It stats (using |
|
|
589 | C<lstat>) the path specified in the watcher and sets perls stat cache (as |
|
|
590 | well as EV's idea of the current stat values) to the values found. |
|
|
591 | |
|
|
592 | In scalar context, a boolean is return indicating success or failure of |
|
|
593 | the stat. In list context, the same 13-value list as with stat is returned |
|
|
594 | (except that the blksize and blocks fields are not reliable). |
|
|
595 | |
|
|
596 | In the case of an error, errno is set to C<ENOENT> (regardless of the |
|
|
597 | actual error value) and the C<nlink> value is forced to zero (if the stat |
|
|
598 | was successful then nlink is guaranteed to be non-zero). |
|
|
599 | |
|
|
600 | See also the next two entries for more info. |
|
|
601 | |
|
|
602 | =item ... = $w->attr |
|
|
603 | |
|
|
604 | Just like C<< $w->stat >>, but without the initial stat'ing: this returns |
|
|
605 | the values most recently detected by EV. See the next entry for more info. |
|
|
606 | |
|
|
607 | =item ... = $w->prev |
|
|
608 | |
|
|
609 | Just like C<< $w->stat >>, but without the initial stat'ing: this returns |
|
|
610 | the previous set of values, before the change. |
|
|
611 | |
|
|
612 | That is, when the watcher callback is invoked, C<< $w->prev >> will be set |
|
|
613 | to the values found I<before> a change was detected, while C<< $w->attr >> |
|
|
614 | returns the values found leading to the change detection. The difference (if any) |
|
|
615 | between C<prev> and C<attr> is what triggered the callback. |
|
|
616 | |
|
|
617 | If you did something to the filesystem object and do not want to trigger |
|
|
618 | yet another change, you can call C<stat> to update EV's idea of what the |
|
|
619 | current attributes are. |
|
|
620 | |
|
|
621 | =item $w->set ($path, $interval) |
|
|
622 | |
|
|
623 | Reconfigures the watcher, see the constructor above for details. Can be |
|
|
624 | called at any time. |
|
|
625 | |
|
|
626 | =item $current_path = $w->path |
|
|
627 | |
|
|
628 | =item $old_path = $w->path ($new_path) |
|
|
629 | |
|
|
630 | Returns the previously set path and optionally set a new one. |
|
|
631 | |
|
|
632 | =item $current_interval = $w->interval |
|
|
633 | |
|
|
634 | =item $old_interval = $w->interval ($new_interval) |
|
|
635 | |
|
|
636 | Returns the previously set interval and optionally set a new one. Can be |
|
|
637 | used to query the actual interval used. |
|
|
638 | |
|
|
639 | =back |
|
|
640 | |
|
|
641 | |
|
|
642 | =head3 IDLE WATCHERS - when you've got nothing better to do... |
|
|
643 | |
|
|
644 | =over 4 |
505 | |
645 | |
506 | =item $w = EV::idle $callback |
646 | =item $w = EV::idle $callback |
507 | |
647 | |
508 | =item $w = EV::idle_ns $callback |
648 | =item $w = EV::idle_ns $callback |
509 | |
649 | |
… | |
… | |
513 | The process will not block as long as any idle watchers are active, and |
653 | The process will not block as long as any idle watchers are active, and |
514 | they will be called repeatedly until stopped. |
654 | they will be called repeatedly until stopped. |
515 | |
655 | |
516 | The C<idle_ns> variant doesn't start (activate) the newly created watcher. |
656 | The C<idle_ns> variant doesn't start (activate) the newly created watcher. |
517 | |
657 | |
|
|
658 | =back |
|
|
659 | |
|
|
660 | |
|
|
661 | =head3 PREPARE WATCHERS - customise your event loop! |
|
|
662 | |
|
|
663 | =over 4 |
518 | |
664 | |
519 | =item $w = EV::prepare $callback |
665 | =item $w = EV::prepare $callback |
520 | |
666 | |
521 | =item $w = EV::prepare_ns $callback |
667 | =item $w = EV::prepare_ns $callback |
522 | |
668 | |
… | |
… | |
525 | |
671 | |
526 | See the EV::check watcher, below, for explanations and an example. |
672 | See the EV::check watcher, below, for explanations and an example. |
527 | |
673 | |
528 | The C<prepare_ns> variant doesn't start (activate) the newly created watcher. |
674 | The C<prepare_ns> variant doesn't start (activate) the newly created watcher. |
529 | |
675 | |
|
|
676 | =back |
|
|
677 | |
|
|
678 | |
|
|
679 | =head3 CHECK WATCHERS - customise your event loop even more! |
|
|
680 | |
|
|
681 | =over 4 |
530 | |
682 | |
531 | =item $w = EV::check $callback |
683 | =item $w = EV::check $callback |
532 | |
684 | |
533 | =item $w = EV::check_ns $callback |
685 | =item $w = EV::check_ns $callback |
534 | |
686 | |
… | |
… | |
579 | first). |
731 | first). |
580 | |
732 | |
581 | The C<check_ns> variant doesn't start (activate) the newly created watcher. |
733 | The C<check_ns> variant doesn't start (activate) the newly created watcher. |
582 | |
734 | |
583 | =back |
735 | =back |
|
|
736 | |
|
|
737 | |
|
|
738 | =head3 FORK WATCHERS - the audacity to resume the event loop after a fork |
|
|
739 | |
|
|
740 | Fork watchers are called when a C<fork ()> was detected. The invocation |
|
|
741 | is done before the event loop blocks next and before C<check> watchers |
|
|
742 | are being called, and only in the child after the fork. |
|
|
743 | |
|
|
744 | =over 4 |
|
|
745 | |
|
|
746 | =item $w = EV::fork $callback |
|
|
747 | |
|
|
748 | =item $w = EV::fork_ns $callback |
|
|
749 | |
|
|
750 | Call the callback before the event loop is resumed in the child process |
|
|
751 | after a fork. |
|
|
752 | |
|
|
753 | The C<fork_ns> variant doesn't start (activate) the newly created watcher. |
|
|
754 | |
|
|
755 | =back |
|
|
756 | |
584 | |
757 | |
585 | =head1 THREADS |
758 | =head1 THREADS |
586 | |
759 | |
587 | Threads are not supported by this module in any way. Perl pseudo-threads |
760 | Threads are not supported by this module in any way. Perl pseudo-threads |
588 | is evil stuff and must die. As soon as Perl gains real threads I will work |
761 | is evil stuff and must die. As soon as Perl gains real threads I will work |
… | |
… | |
616 | |
789 | |
617 | 1; |
790 | 1; |
618 | |
791 | |
619 | =head1 SEE ALSO |
792 | =head1 SEE ALSO |
620 | |
793 | |
621 | L<EV::DNS>. |
794 | L<EV::ADNS> (asynchronous dns), L<Glib::EV> (makes Glib/Gtk2 use EV as |
|
|
795 | event loop), L<Coro::EV> (efficient coroutines with EV). |
622 | |
796 | |
623 | =head1 AUTHOR |
797 | =head1 AUTHOR |
624 | |
798 | |
625 | Marc Lehmann <schmorp@schmorp.de> |
799 | Marc Lehmann <schmorp@schmorp.de> |
626 | http://home.schmorp.de/ |
800 | http://home.schmorp.de/ |