1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | AnyEvent - events independent of event loop implementation |
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 | |
… | |
… | |
47 | |
47 | |
48 | There is a mailinglist for discussing all things AnyEvent, and an IRC |
48 | There is a mailinglist for discussing all things AnyEvent, and an IRC |
49 | channel, too. |
49 | channel, too. |
50 | |
50 | |
51 | See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software |
51 | See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software |
52 | Respository>, at L<http://anyevent.schmorp.de>, for more info. |
52 | Repository>, at L<http://anyevent.schmorp.de>, for more info. |
53 | |
53 | |
54 | =head1 WHY YOU SHOULD USE THIS MODULE (OR NOT) |
54 | =head1 WHY YOU SHOULD USE THIS MODULE (OR NOT) |
55 | |
55 | |
56 | 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 |
57 | nowadays. So what is different about AnyEvent? |
57 | nowadays. So what is different about AnyEvent? |
… | |
… | |
181 | 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 |
182 | declared. |
182 | declared. |
183 | |
183 | |
184 | =head2 I/O WATCHERS |
184 | =head2 I/O WATCHERS |
185 | |
185 | |
|
|
186 | $w = AnyEvent->io ( |
|
|
187 | fh => <filehandle_or_fileno>, |
|
|
188 | poll => <"r" or "w">, |
|
|
189 | cb => <callback>, |
|
|
190 | ); |
|
|
191 | |
186 | 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 |
187 | with the following mandatory key-value pairs as arguments: |
193 | with the following mandatory key-value pairs as arguments: |
188 | |
194 | |
189 | 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 |
190 | 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 |
… | |
… | |
219 | undef $w; |
225 | undef $w; |
220 | }); |
226 | }); |
221 | |
227 | |
222 | =head2 TIME WATCHERS |
228 | =head2 TIME WATCHERS |
223 | |
229 | |
|
|
230 | $w = AnyEvent->timer (after => <seconds>, cb => <callback>); |
|
|
231 | |
|
|
232 | $w = AnyEvent->timer ( |
|
|
233 | after => <fractional_seconds>, |
|
|
234 | interval => <fractional_seconds>, |
|
|
235 | cb => <callback>, |
|
|
236 | ); |
|
|
237 | |
224 | 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 >> |
225 | method with the following mandatory arguments: |
239 | method with the following mandatory arguments: |
226 | |
240 | |
227 | C<after> specifies after how many seconds (fractional values are |
241 | C<after> specifies after how many seconds (fractional values are |
228 | 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 |
… | |
… | |
355 | |
369 | |
356 | =back |
370 | =back |
357 | |
371 | |
358 | =head2 SIGNAL WATCHERS |
372 | =head2 SIGNAL WATCHERS |
359 | |
373 | |
|
|
374 | $w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>); |
|
|
375 | |
360 | You can watch for signals using a signal watcher, C<signal> is the signal |
376 | You can watch for signals using a signal watcher, C<signal> is the signal |
361 | I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl |
377 | I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl |
362 | callback to be invoked whenever a signal occurs. |
378 | callback to be invoked whenever a signal occurs. |
363 | |
379 | |
364 | Although the callback might get passed parameters, their value and |
380 | Although the callback might get passed parameters, their value and |
… | |
… | |
383 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
399 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
384 | |
400 | |
385 | =head3 Signal Races, Delays and Workarounds |
401 | =head3 Signal Races, Delays and Workarounds |
386 | |
402 | |
387 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
403 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
388 | callbacks to signals in a generic way, which is a pity, as you cannot do |
404 | callbacks to signals in a generic way, which is a pity, as you cannot |
389 | race-free signal handling in perl. AnyEvent will try to do it's best, but |
405 | do race-free signal handling in perl, requiring C libraries for |
|
|
406 | this. AnyEvent will try to do it's best, which means in some cases, |
390 | in some cases, signals will be delayed. The maximum time a signal might |
407 | signals will be delayed. The maximum time a signal might be delayed is |
391 | be delayed is specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 |
408 | specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This |
392 | seconds). This variable can be changed only before the first signal |
409 | variable can be changed only before the first signal watcher is created, |
393 | watcher is created, and should be left alone otherwise. Higher values |
410 | and should be left alone otherwise. This variable determines how often |
|
|
411 | AnyEvent polls for signals (in case a wake-up was missed). Higher values |
394 | will cause fewer spurious wake-ups, which is better for power and CPU |
412 | will cause fewer spurious wake-ups, which is better for power and CPU |
|
|
413 | saving. |
|
|
414 | |
395 | saving. All these problems can be avoided by installing the optional |
415 | All these problems can be avoided by installing the optional |
396 | L<Async::Interrupt> module. This will not work with inherently broken |
416 | L<Async::Interrupt> module, which works with most event loops. It will not |
397 | event loops such as L<Event> or L<Event::Lib> (and not with L<POE> |
417 | work with inherently broken event loops such as L<Event> or L<Event::Lib> |
398 | currently, as POE does it's own workaround with one-second latency). With |
418 | (and not with L<POE> currently, as POE does it's own workaround with |
399 | those, you just have to suffer the delays. |
419 | one-second latency). For those, you just have to suffer the delays. |
400 | |
420 | |
401 | =head2 CHILD PROCESS WATCHERS |
421 | =head2 CHILD PROCESS WATCHERS |
402 | |
422 | |
|
|
423 | $w = AnyEvent->child (pid => <process id>, cb => <callback>); |
|
|
424 | |
403 | You can also watch on a child process exit and catch its exit status. |
425 | You can also watch on a child process exit and catch its exit status. |
404 | |
426 | |
405 | The child process is specified by the C<pid> argument (if set to C<0>, it |
427 | The child process is specified by the C<pid> argument (one some backends, |
406 | watches for any child process exit). The watcher will triggered only when |
428 | using C<0> watches for any child process exit, on others this will |
407 | the child process has finished and an exit status is available, not on |
429 | croak). The watcher will be triggered only when the child process has |
408 | any trace events (stopped/continued). |
430 | finished and an exit status is available, not on any trace events |
|
|
431 | (stopped/continued). |
409 | |
432 | |
410 | The callback will be called with the pid and exit status (as returned by |
433 | The callback will be called with the pid and exit status (as returned by |
411 | waitpid), so unlike other watcher types, you I<can> rely on child watcher |
434 | waitpid), so unlike other watcher types, you I<can> rely on child watcher |
412 | callback arguments. |
435 | callback arguments. |
413 | |
436 | |
… | |
… | |
454 | # do something else, then wait for process exit |
477 | # do something else, then wait for process exit |
455 | $done->recv; |
478 | $done->recv; |
456 | |
479 | |
457 | =head2 IDLE WATCHERS |
480 | =head2 IDLE WATCHERS |
458 | |
481 | |
|
|
482 | $w = AnyEvent->idle (cb => <callback>); |
|
|
483 | |
459 | Sometimes there is a need to do something, but it is not so important |
484 | Sometimes there is a need to do something, but it is not so important |
460 | to do it instantly, but only when there is nothing better to do. This |
485 | to do it instantly, but only when there is nothing better to do. This |
461 | "nothing better to do" is usually defined to be "no other events need |
486 | "nothing better to do" is usually defined to be "no other events need |
462 | attention by the event loop". |
487 | attention by the event loop". |
463 | |
488 | |
… | |
… | |
489 | }); |
514 | }); |
490 | }); |
515 | }); |
491 | |
516 | |
492 | =head2 CONDITION VARIABLES |
517 | =head2 CONDITION VARIABLES |
493 | |
518 | |
|
|
519 | $cv = AnyEvent->condvar; |
|
|
520 | |
|
|
521 | $cv->send (<list>); |
|
|
522 | my @res = $cv->recv; |
|
|
523 | |
494 | If you are familiar with some event loops you will know that all of them |
524 | If you are familiar with some event loops you will know that all of them |
495 | require you to run some blocking "loop", "run" or similar function that |
525 | require you to run some blocking "loop", "run" or similar function that |
496 | will actively watch for new events and call your callbacks. |
526 | will actively watch for new events and call your callbacks. |
497 | |
527 | |
498 | AnyEvent is slightly different: it expects somebody else to run the event |
528 | AnyEvent is slightly different: it expects somebody else to run the event |
… | |
… | |
760 | =item $cb = $cv->cb ($cb->($cv)) |
790 | =item $cb = $cv->cb ($cb->($cv)) |
761 | |
791 | |
762 | This is a mutator function that returns the callback set and optionally |
792 | This is a mutator function that returns the callback set and optionally |
763 | replaces it before doing so. |
793 | replaces it before doing so. |
764 | |
794 | |
765 | The callback will be called when the condition becomes "true", i.e. when |
795 | The callback will be called when the condition becomes (or already was) |
766 | C<send> or C<croak> are called, with the only argument being the condition |
796 | "true", i.e. when C<send> or C<croak> are called (or were called), with |
767 | variable itself. Calling C<recv> inside the callback or at any later time |
797 | the only argument being the condition variable itself. Calling C<recv> |
768 | is guaranteed not to block. |
798 | inside the callback or at any later time is guaranteed not to block. |
769 | |
799 | |
770 | =back |
800 | =back |
771 | |
801 | |
772 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
802 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
773 | |
803 | |
… | |
… | |
796 | |
826 | |
797 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
827 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
798 | AnyEvent::Impl::Tk based on Tk, very broken. |
828 | AnyEvent::Impl::Tk based on Tk, very broken. |
799 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
829 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
800 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
830 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
|
|
831 | AnyEvent::Impl::Irssi used when running within irssi. |
801 | |
832 | |
802 | =item Backends with special needs. |
833 | =item Backends with special needs. |
803 | |
834 | |
804 | Qt requires the Qt::Application to be instantiated first, but will |
835 | Qt requires the Qt::Application to be instantiated first, but will |
805 | otherwise be picked up automatically. As long as the main program |
836 | otherwise be picked up automatically. As long as the main program |
… | |
… | |
1084 | |
1115 | |
1085 | BEGIN { AnyEvent::common_sense } |
1116 | BEGIN { AnyEvent::common_sense } |
1086 | |
1117 | |
1087 | use Carp (); |
1118 | use Carp (); |
1088 | |
1119 | |
1089 | our $VERSION = 4.86; |
1120 | our $VERSION = 4.92; |
1090 | our $MODEL; |
1121 | our $MODEL; |
1091 | |
1122 | |
1092 | our $AUTOLOAD; |
1123 | our $AUTOLOAD; |
1093 | our @ISA; |
1124 | our @ISA; |
1094 | |
1125 | |
… | |
… | |
1119 | for reverse split /\s*,\s*/, |
1150 | for reverse split /\s*,\s*/, |
1120 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1151 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1121 | } |
1152 | } |
1122 | |
1153 | |
1123 | my @models = ( |
1154 | my @models = ( |
1124 | [EV:: => AnyEvent::Impl::EV::], |
1155 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1125 | [Event:: => AnyEvent::Impl::Event::], |
1156 | [Event:: => AnyEvent::Impl::Event::, 1], |
1126 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::], |
1157 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], |
1127 | # everything below here will not be autoprobed |
1158 | # everything below here will not (normally) be autoprobed |
1128 | # as the pureperl backend should work everywhere |
1159 | # as the pureperl backend should work everywhere |
1129 | # and is usually faster |
1160 | # and is usually faster |
1130 | [Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers |
1161 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1131 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1162 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
|
|
1163 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
1132 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1164 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1133 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1165 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1134 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1166 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1135 | [Wx:: => AnyEvent::Impl::POE::], |
1167 | [Wx:: => AnyEvent::Impl::POE::], |
1136 | [Prima:: => AnyEvent::Impl::POE::], |
1168 | [Prima:: => AnyEvent::Impl::POE::], |
1137 | # IO::Async is just too broken - we would need workarounds for its |
1169 | # IO::Async is just too broken - we would need workarounds for its |
1138 | # byzantine signal and broken child handling, among others. |
1170 | # byzantine signal and broken child handling, among others. |
1139 | # IO::Async is rather hard to detect, as it doesn't have any |
1171 | # IO::Async is rather hard to detect, as it doesn't have any |
1140 | # obvious default class. |
1172 | # obvious default class. |
1141 | # [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1173 | # [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1142 | # [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1174 | # [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1143 | # [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1175 | # [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1144 | ); |
1176 | ); |
1145 | |
1177 | |
1146 | our %method = map +($_ => 1), |
1178 | our %method = map +($_ => 1), |
1147 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1179 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1148 | |
1180 | |
… | |
… | |
1152 | my ($cb) = @_; |
1184 | my ($cb) = @_; |
1153 | |
1185 | |
1154 | if ($MODEL) { |
1186 | if ($MODEL) { |
1155 | $cb->(); |
1187 | $cb->(); |
1156 | |
1188 | |
1157 | 1 |
1189 | undef |
1158 | } else { |
1190 | } else { |
1159 | push @post_detect, $cb; |
1191 | push @post_detect, $cb; |
1160 | |
1192 | |
1161 | defined wantarray |
1193 | defined wantarray |
1162 | ? bless \$cb, "AnyEvent::Util::postdetect" |
1194 | ? bless \$cb, "AnyEvent::Util::postdetect" |
… | |
… | |
1194 | } |
1226 | } |
1195 | } |
1227 | } |
1196 | } |
1228 | } |
1197 | |
1229 | |
1198 | unless ($MODEL) { |
1230 | unless ($MODEL) { |
1199 | # try to load a model |
1231 | # try to autoload a model |
1200 | |
|
|
1201 | for (@REGISTRY, @models) { |
1232 | for (@REGISTRY, @models) { |
1202 | my ($package, $model) = @$_; |
1233 | my ($package, $model, $autoload) = @$_; |
|
|
1234 | if ( |
|
|
1235 | $autoload |
1203 | if (eval "require $package" |
1236 | and eval "require $package" |
1204 | and ${"$package\::VERSION"} > 0 |
1237 | and ${"$package\::VERSION"} > 0 |
1205 | and eval "require $model") { |
1238 | and eval "require $model" |
|
|
1239 | ) { |
1206 | $MODEL = $model; |
1240 | $MODEL = $model; |
1207 | warn "AnyEvent: autoprobed model '$model', using it.\n" if $VERBOSE >= 2; |
1241 | warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2; |
1208 | last; |
1242 | last; |
1209 | } |
1243 | } |
1210 | } |
1244 | } |
1211 | |
1245 | |
1212 | $MODEL |
1246 | $MODEL |
… | |
… | |
1251 | or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,"; |
1285 | or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,"; |
1252 | |
1286 | |
1253 | # we assume CLOEXEC is already set by perl in all important cases |
1287 | # we assume CLOEXEC is already set by perl in all important cases |
1254 | |
1288 | |
1255 | ($fh2, $rw) |
1289 | ($fh2, $rw) |
|
|
1290 | } |
|
|
1291 | |
|
|
1292 | ############################################################################# |
|
|
1293 | # "new" API, currently only emulation of it |
|
|
1294 | ############################################################################# |
|
|
1295 | |
|
|
1296 | package AE; |
|
|
1297 | |
|
|
1298 | our $VERSION = $AnyEvent::VERSION; |
|
|
1299 | |
|
|
1300 | sub io($$$) { |
|
|
1301 | AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) |
|
|
1302 | } |
|
|
1303 | |
|
|
1304 | sub timer($$$) { |
|
|
1305 | AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]); |
|
|
1306 | } |
|
|
1307 | |
|
|
1308 | sub signal($$) { |
|
|
1309 | AnyEvent->signal (signal => $_[0], cb => $_[1]); |
|
|
1310 | } |
|
|
1311 | |
|
|
1312 | sub child($$) { |
|
|
1313 | AnyEvent->child (pid => $_[0], cb => $_[1]); |
|
|
1314 | } |
|
|
1315 | |
|
|
1316 | sub idle($) { |
|
|
1317 | AnyEvent->idle (cb => $_[0]); |
|
|
1318 | } |
|
|
1319 | |
|
|
1320 | sub cv(;&) { |
|
|
1321 | AnyEvent->condvar (@_ ? (cb => $_[0]) : ()) |
|
|
1322 | } |
|
|
1323 | |
|
|
1324 | sub now() { |
|
|
1325 | AnyEvent->now |
|
|
1326 | } |
|
|
1327 | |
|
|
1328 | sub now_update() { |
|
|
1329 | AnyEvent->now_update |
|
|
1330 | } |
|
|
1331 | |
|
|
1332 | sub time() { |
|
|
1333 | AnyEvent->time |
1256 | } |
1334 | } |
1257 | |
1335 | |
1258 | package AnyEvent::Base; |
1336 | package AnyEvent::Base; |
1259 | |
1337 | |
1260 | # default implementations for many methods |
1338 | # default implementations for many methods |
… | |
… | |
1284 | } |
1362 | } |
1285 | |
1363 | |
1286 | # default implementation for ->signal |
1364 | # default implementation for ->signal |
1287 | |
1365 | |
1288 | our $HAVE_ASYNC_INTERRUPT; |
1366 | our $HAVE_ASYNC_INTERRUPT; |
|
|
1367 | |
|
|
1368 | sub _have_async_interrupt() { |
|
|
1369 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
|
|
1370 | && eval "use Async::Interrupt 1.0 (); 1") |
|
|
1371 | unless defined $HAVE_ASYNC_INTERRUPT; |
|
|
1372 | |
|
|
1373 | $HAVE_ASYNC_INTERRUPT |
|
|
1374 | } |
|
|
1375 | |
1289 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1376 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1290 | our (%SIG_ASY, %SIG_ASY_W); |
1377 | our (%SIG_ASY, %SIG_ASY_W); |
1291 | our ($SIG_COUNT, $SIG_TW); |
1378 | our ($SIG_COUNT, $SIG_TW); |
1292 | |
1379 | |
1293 | sub _signal_exec { |
1380 | sub _signal_exec { |
… | |
… | |
1301 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1388 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1302 | } |
1389 | } |
1303 | } |
1390 | } |
1304 | } |
1391 | } |
1305 | |
1392 | |
1306 | # install a dumym wakeupw atcher to reduce signal catching latency |
1393 | # install a dummy wakeup watcher to reduce signal catching latency |
1307 | sub _sig_add() { |
1394 | sub _sig_add() { |
1308 | unless ($SIG_COUNT++) { |
1395 | unless ($SIG_COUNT++) { |
1309 | # try to align timer on a full-second boundary, if possible |
1396 | # try to align timer on a full-second boundary, if possible |
1310 | my $NOW = AnyEvent->now; |
1397 | my $NOW = AE::now; |
1311 | |
1398 | |
1312 | $SIG_TW = AnyEvent->timer ( |
1399 | $SIG_TW = AE::timer |
1313 | after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1400 | $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1314 | interval => $MAX_SIGNAL_LATENCY, |
1401 | $MAX_SIGNAL_LATENCY, |
1315 | cb => sub { }, # just for the PERL_ASYNC_CHECK |
1402 | sub { } # just for the PERL_ASYNC_CHECK |
1316 | ); |
1403 | ; |
1317 | } |
1404 | } |
1318 | } |
1405 | } |
1319 | |
1406 | |
1320 | sub _sig_del { |
1407 | sub _sig_del { |
1321 | undef $SIG_TW |
1408 | undef $SIG_TW |
1322 | unless --$SIG_COUNT; |
1409 | unless --$SIG_COUNT; |
1323 | } |
1410 | } |
1324 | |
1411 | |
|
|
1412 | our $_sig_name_init; $_sig_name_init = sub { |
|
|
1413 | eval q{ # poor man's autoloading |
|
|
1414 | undef $_sig_name_init; |
|
|
1415 | |
|
|
1416 | if (_have_async_interrupt) { |
|
|
1417 | *sig2num = \&Async::Interrupt::sig2num; |
|
|
1418 | *sig2name = \&Async::Interrupt::sig2name; |
|
|
1419 | } else { |
|
|
1420 | require Config; |
|
|
1421 | |
|
|
1422 | my %signame2num; |
|
|
1423 | @signame2num{ split ' ', $Config::Config{sig_name} } |
|
|
1424 | = split ' ', $Config::Config{sig_num}; |
|
|
1425 | |
|
|
1426 | my @signum2name; |
|
|
1427 | @signum2name[values %signame2num] = keys %signame2num; |
|
|
1428 | |
|
|
1429 | *sig2num = sub($) { |
|
|
1430 | $_[0] > 0 ? shift : $signame2num{+shift} |
|
|
1431 | }; |
|
|
1432 | *sig2name = sub ($) { |
|
|
1433 | $_[0] > 0 ? $signum2name[+shift] : shift |
|
|
1434 | }; |
|
|
1435 | } |
|
|
1436 | }; |
|
|
1437 | die if $@; |
|
|
1438 | }; |
|
|
1439 | |
|
|
1440 | sub sig2num ($) { &$_sig_name_init; &sig2num } |
|
|
1441 | sub sig2name($) { &$_sig_name_init; &sig2name } |
|
|
1442 | |
1325 | sub _signal { |
1443 | sub signal { |
|
|
1444 | eval q{ # poor man's autoloading {} |
|
|
1445 | # probe for availability of Async::Interrupt |
|
|
1446 | if (_have_async_interrupt) { |
|
|
1447 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1448 | |
|
|
1449 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1450 | $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; |
|
|
1451 | |
|
|
1452 | } else { |
|
|
1453 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1454 | |
|
|
1455 | require Fcntl; |
|
|
1456 | |
|
|
1457 | if (AnyEvent::WIN32) { |
|
|
1458 | require AnyEvent::Util; |
|
|
1459 | |
|
|
1460 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1461 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R; |
|
|
1462 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case |
|
|
1463 | } else { |
|
|
1464 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1465 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1466 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1467 | |
|
|
1468 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1469 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1470 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1471 | } |
|
|
1472 | |
|
|
1473 | $SIGPIPE_R |
|
|
1474 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1475 | |
|
|
1476 | $SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec; |
|
|
1477 | } |
|
|
1478 | |
|
|
1479 | *signal = sub { |
1326 | my (undef, %arg) = @_; |
1480 | my (undef, %arg) = @_; |
1327 | |
1481 | |
1328 | my $signal = uc $arg{signal} |
1482 | my $signal = uc $arg{signal} |
1329 | or Carp::croak "required option 'signal' is missing"; |
1483 | or Carp::croak "required option 'signal' is missing"; |
1330 | |
1484 | |
1331 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1332 | |
|
|
1333 | if ($HAVE_ASYNC_INTERRUPT) { |
1485 | if ($HAVE_ASYNC_INTERRUPT) { |
1334 | # async::interrupt |
1486 | # async::interrupt |
1335 | |
1487 | |
1336 | $SIG_ASY{$signal} ||= do { |
1488 | $signal = sig2num $signal; |
1337 | my $asy = new Async::Interrupt |
1489 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1490 | |
|
|
1491 | $SIG_ASY{$signal} ||= new Async::Interrupt |
1338 | cb => sub { undef $SIG_EV{$signal} }, |
1492 | cb => sub { undef $SIG_EV{$signal} }, |
1339 | signal => $signal, |
1493 | signal => $signal, |
1340 | pipe => [$SIGPIPE_R->filenos], |
1494 | pipe => [$SIGPIPE_R->filenos], |
|
|
1495 | pipe_autodrain => 0, |
|
|
1496 | ; |
|
|
1497 | |
|
|
1498 | } else { |
|
|
1499 | # pure perl |
|
|
1500 | |
|
|
1501 | # AE::Util has been loaded in signal |
|
|
1502 | $signal = sig2name $signal; |
|
|
1503 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1504 | |
|
|
1505 | $SIG{$signal} ||= sub { |
|
|
1506 | local $!; |
|
|
1507 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
|
|
1508 | undef $SIG_EV{$signal}; |
|
|
1509 | }; |
|
|
1510 | |
|
|
1511 | # can't do signal processing without introducing races in pure perl, |
|
|
1512 | # so limit the signal latency. |
|
|
1513 | _sig_add; |
1341 | ; |
1514 | } |
1342 | $asy->pipe_autodrain (0); |
|
|
1343 | |
1515 | |
1344 | $asy |
1516 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
1345 | }; |
1517 | }; |
1346 | |
1518 | |
1347 | } else { |
1519 | *AnyEvent::Base::signal::DESTROY = sub { |
1348 | # pure perl |
1520 | my ($signal, $cb) = @{$_[0]}; |
1349 | |
1521 | |
1350 | $SIG{$signal} ||= sub { |
1522 | _sig_del; |
1351 | local $!; |
1523 | |
1352 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
1524 | delete $SIG_CB{$signal}{$cb}; |
|
|
1525 | |
|
|
1526 | $HAVE_ASYNC_INTERRUPT |
|
|
1527 | ? delete $SIG_ASY{$signal} |
|
|
1528 | : # delete doesn't work with older perls - they then |
|
|
1529 | # print weird messages, or just unconditionally exit |
|
|
1530 | # instead of getting the default action. |
1353 | undef $SIG_EV{$signal}; |
1531 | undef $SIG{$signal} |
|
|
1532 | unless keys %{ $SIG_CB{$signal} }; |
1354 | }; |
1533 | }; |
1355 | |
|
|
1356 | # can't do signal processing without introducing races in pure perl, |
|
|
1357 | # so limit the signal latency. |
|
|
1358 | _sig_add; |
|
|
1359 | } |
1534 | }; |
1360 | |
1535 | die if $@; |
1361 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
|
|
1362 | } |
|
|
1363 | |
|
|
1364 | sub signal { |
|
|
1365 | # probe for availability of Async::Interrupt |
|
|
1366 | if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") { |
|
|
1367 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1368 | |
|
|
1369 | $HAVE_ASYNC_INTERRUPT = 1; |
|
|
1370 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1371 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec); |
|
|
1372 | |
|
|
1373 | } else { |
|
|
1374 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1375 | |
|
|
1376 | require Fcntl; |
|
|
1377 | |
|
|
1378 | if (AnyEvent::WIN32) { |
|
|
1379 | require AnyEvent::Util; |
|
|
1380 | |
|
|
1381 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1382 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R; |
|
|
1383 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case |
|
|
1384 | } else { |
|
|
1385 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1386 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1387 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1388 | |
|
|
1389 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1390 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1391 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1392 | } |
|
|
1393 | |
|
|
1394 | $SIGPIPE_R |
|
|
1395 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1396 | |
|
|
1397 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec); |
|
|
1398 | } |
|
|
1399 | |
|
|
1400 | *signal = \&_signal; |
|
|
1401 | &signal |
1536 | &signal |
1402 | } |
|
|
1403 | |
|
|
1404 | sub AnyEvent::Base::signal::DESTROY { |
|
|
1405 | my ($signal, $cb) = @{$_[0]}; |
|
|
1406 | |
|
|
1407 | _sig_del; |
|
|
1408 | |
|
|
1409 | delete $SIG_CB{$signal}{$cb}; |
|
|
1410 | |
|
|
1411 | $HAVE_ASYNC_INTERRUPT |
|
|
1412 | ? delete $SIG_ASY{$signal} |
|
|
1413 | : # delete doesn't work with older perls - they then |
|
|
1414 | # print weird messages, or just unconditionally exit |
|
|
1415 | # instead of getting the default action. |
|
|
1416 | undef $SIG{$signal} |
|
|
1417 | unless keys %{ $SIG_CB{$signal} }; |
|
|
1418 | } |
1537 | } |
1419 | |
1538 | |
1420 | # default implementation for ->child |
1539 | # default implementation for ->child |
1421 | |
1540 | |
1422 | our %PID_CB; |
1541 | our %PID_CB; |
1423 | our $CHLD_W; |
1542 | our $CHLD_W; |
1424 | our $CHLD_DELAY_W; |
1543 | our $CHLD_DELAY_W; |
1425 | our $WNOHANG; |
1544 | our $WNOHANG; |
1426 | |
1545 | |
|
|
1546 | sub _emit_childstatus($$) { |
|
|
1547 | my (undef, $rpid, $rstatus) = @_; |
|
|
1548 | |
|
|
1549 | $_->($rpid, $rstatus) |
|
|
1550 | for values %{ $PID_CB{$rpid} || {} }, |
|
|
1551 | values %{ $PID_CB{0} || {} }; |
|
|
1552 | } |
|
|
1553 | |
1427 | sub _sigchld { |
1554 | sub _sigchld { |
|
|
1555 | my $pid; |
|
|
1556 | |
|
|
1557 | AnyEvent->_emit_childstatus ($pid, $?) |
1428 | while (0 < (my $pid = waitpid -1, $WNOHANG)) { |
1558 | while ($pid = waitpid -1, $WNOHANG) > 0; |
1429 | $_->($pid, $?) |
|
|
1430 | for values %{ $PID_CB{$pid} || {} }, |
|
|
1431 | values %{ $PID_CB{0} || {} }; |
|
|
1432 | } |
|
|
1433 | } |
1559 | } |
1434 | |
1560 | |
1435 | sub child { |
1561 | sub child { |
1436 | my (undef, %arg) = @_; |
1562 | my (undef, %arg) = @_; |
1437 | |
1563 | |
… | |
… | |
1444 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1570 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1445 | ? 1 |
1571 | ? 1 |
1446 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1572 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1447 | |
1573 | |
1448 | unless ($CHLD_W) { |
1574 | unless ($CHLD_W) { |
1449 | $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld); |
1575 | $CHLD_W = AE::signal CHLD => \&_sigchld; |
1450 | # child could be a zombie already, so make at least one round |
1576 | # child could be a zombie already, so make at least one round |
1451 | &_sigchld; |
1577 | &_sigchld; |
1452 | } |
1578 | } |
1453 | |
1579 | |
1454 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
1580 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
… | |
… | |
1480 | # never use more then 50% of the time for the idle watcher, |
1606 | # never use more then 50% of the time for the idle watcher, |
1481 | # within some limits |
1607 | # within some limits |
1482 | $w = 0.0001 if $w < 0.0001; |
1608 | $w = 0.0001 if $w < 0.0001; |
1483 | $w = 5 if $w > 5; |
1609 | $w = 5 if $w > 5; |
1484 | |
1610 | |
1485 | $w = AnyEvent->timer (after => $w, cb => $rcb); |
1611 | $w = AE::timer $w, 0, $rcb; |
1486 | } else { |
1612 | } else { |
1487 | # clean up... |
1613 | # clean up... |
1488 | undef $w; |
1614 | undef $w; |
1489 | undef $rcb; |
1615 | undef $rcb; |
1490 | } |
1616 | } |
1491 | }; |
1617 | }; |
1492 | |
1618 | |
1493 | $w = AnyEvent->timer (after => 0.05, cb => $rcb); |
1619 | $w = AE::timer 0.05, 0, $rcb; |
1494 | |
1620 | |
1495 | bless \\$cb, "AnyEvent::Base::idle" |
1621 | bless \\$cb, "AnyEvent::Base::idle" |
1496 | } |
1622 | } |
1497 | |
1623 | |
1498 | sub AnyEvent::Base::idle::DESTROY { |
1624 | sub AnyEvent::Base::idle::DESTROY { |
… | |
… | |
1552 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1678 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1553 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1679 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1554 | } |
1680 | } |
1555 | |
1681 | |
1556 | sub cb { |
1682 | sub cb { |
1557 | $_[0]{_ae_cb} = $_[1] if @_ > 1; |
1683 | my $cv = shift; |
|
|
1684 | |
|
|
1685 | @_ |
|
|
1686 | and $cv->{_ae_cb} = shift |
|
|
1687 | and $cv->{_ae_sent} |
|
|
1688 | and (delete $cv->{_ae_cb})->($cv); |
|
|
1689 | |
1558 | $_[0]{_ae_cb} |
1690 | $cv->{_ae_cb} |
1559 | } |
1691 | } |
1560 | |
1692 | |
1561 | sub begin { |
1693 | sub begin { |
1562 | ++$_[0]{_ae_counter}; |
1694 | ++$_[0]{_ae_counter}; |
1563 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
1695 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
… | |
… | |
2416 | L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
2548 | L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
2417 | |
2549 | |
2418 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
2550 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
2419 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
2551 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
2420 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
2552 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
2421 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>. |
2553 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. |
2422 | |
2554 | |
2423 | Non-blocking file handles, sockets, TCP clients and |
2555 | Non-blocking file handles, sockets, TCP clients and |
2424 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
2556 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
2425 | |
2557 | |
2426 | Asynchronous DNS: L<AnyEvent::DNS>. |
2558 | Asynchronous DNS: L<AnyEvent::DNS>. |