… | |
… | |
363 | might affect timers and time-outs. |
363 | might affect timers and time-outs. |
364 | |
364 | |
365 | When this is the case, you can call this method, which will update the |
365 | When this is the case, you can call this method, which will update the |
366 | event loop's idea of "current time". |
366 | event loop's idea of "current time". |
367 | |
367 | |
|
|
368 | A typical example would be a script in a web server (e.g. C<mod_perl>) - |
|
|
369 | when mod_perl executes the script, then the event loop will have the wrong |
|
|
370 | idea about the "current time" (being potentially far in the past, when the |
|
|
371 | script ran the last time). In that case you should arrange a call to C<< |
|
|
372 | AnyEvent->now_update >> each time the web server process wakes up again |
|
|
373 | (e.g. at the start of your script, or in a handler). |
|
|
374 | |
368 | Note that updating the time I<might> cause some events to be handled. |
375 | Note that updating the time I<might> cause some events to be handled. |
369 | |
376 | |
370 | =back |
377 | =back |
371 | |
378 | |
372 | =head2 SIGNAL WATCHERS |
379 | =head2 SIGNAL WATCHERS |
… | |
… | |
395 | correctly. |
402 | correctly. |
396 | |
403 | |
397 | Example: exit on SIGINT |
404 | Example: exit on SIGINT |
398 | |
405 | |
399 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
406 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
|
|
407 | |
|
|
408 | =head3 Restart Behaviour |
|
|
409 | |
|
|
410 | While restart behaviour is up to the event loop implementation, most will |
|
|
411 | not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's |
|
|
412 | pure perl implementation). |
|
|
413 | |
|
|
414 | =head3 Safe/Unsafe Signals |
|
|
415 | |
|
|
416 | Perl signals can be either "safe" (synchronous to opcode handling) or |
|
|
417 | "unsafe" (asynchronous) - the former might get delayed indefinitely, the |
|
|
418 | latter might corrupt your memory. |
|
|
419 | |
|
|
420 | AnyEvent signal handlers are, in addition, synchronous to the event loop, |
|
|
421 | i.e. they will not interrupt your running perl program but will only be |
|
|
422 | called as part of the normal event handling (just like timer, I/O etc. |
|
|
423 | callbacks, too). |
400 | |
424 | |
401 | =head3 Signal Races, Delays and Workarounds |
425 | =head3 Signal Races, Delays and Workarounds |
402 | |
426 | |
403 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
427 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
404 | callbacks to signals in a generic way, which is a pity, as you cannot |
428 | callbacks to signals in a generic way, which is a pity, as you cannot |
… | |
… | |
592 | after => 1, |
616 | after => 1, |
593 | cb => sub { $result_ready->send }, |
617 | cb => sub { $result_ready->send }, |
594 | ); |
618 | ); |
595 | |
619 | |
596 | # this "blocks" (while handling events) till the callback |
620 | # this "blocks" (while handling events) till the callback |
597 | # calls -<send |
621 | # calls ->send |
598 | $result_ready->recv; |
622 | $result_ready->recv; |
599 | |
623 | |
600 | Example: wait for a timer, but take advantage of the fact that condition |
624 | Example: wait for a timer, but take advantage of the fact that condition |
601 | variables are also callable directly. |
625 | variables are also callable directly. |
602 | |
626 | |
… | |
… | |
666 | one. For example, a function that pings many hosts in parallel might want |
690 | one. For example, a function that pings many hosts in parallel might want |
667 | to use a condition variable for the whole process. |
691 | to use a condition variable for the whole process. |
668 | |
692 | |
669 | Every call to C<< ->begin >> will increment a counter, and every call to |
693 | Every call to C<< ->begin >> will increment a counter, and every call to |
670 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
694 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
671 | >>, the (last) callback passed to C<begin> will be executed. That callback |
695 | >>, the (last) callback passed to C<begin> will be executed, passing the |
672 | is I<supposed> to call C<< ->send >>, but that is not required. If no |
696 | condvar as first argument. That callback is I<supposed> to call C<< ->send |
673 | callback was set, C<send> will be called without any arguments. |
697 | >>, but that is not required. If no group callback was set, C<send> will |
|
|
698 | be called without any arguments. |
674 | |
699 | |
675 | You can think of C<< $cv->send >> giving you an OR condition (one call |
700 | You can think of C<< $cv->send >> giving you an OR condition (one call |
676 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
701 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
677 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
702 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
678 | |
703 | |
… | |
… | |
705 | begung can potentially be zero: |
730 | begung can potentially be zero: |
706 | |
731 | |
707 | my $cv = AnyEvent->condvar; |
732 | my $cv = AnyEvent->condvar; |
708 | |
733 | |
709 | my %result; |
734 | my %result; |
710 | $cv->begin (sub { $cv->send (\%result) }); |
735 | $cv->begin (sub { shift->send (\%result) }); |
711 | |
736 | |
712 | for my $host (@list_of_hosts) { |
737 | for my $host (@list_of_hosts) { |
713 | $cv->begin; |
738 | $cv->begin; |
714 | ping_host_then_call_callback $host, sub { |
739 | ping_host_then_call_callback $host, sub { |
715 | $result{$host} = ...; |
740 | $result{$host} = ...; |
… | |
… | |
806 | =over 4 |
831 | =over 4 |
807 | |
832 | |
808 | =item Backends that are autoprobed when no other event loop can be found. |
833 | =item Backends that are autoprobed when no other event loop can be found. |
809 | |
834 | |
810 | EV is the preferred backend when no other event loop seems to be in |
835 | EV is the preferred backend when no other event loop seems to be in |
811 | use. If EV is not installed, then AnyEvent will try Event, and, failing |
836 | use. If EV is not installed, then AnyEvent will fall back to its own |
812 | that, will fall back to its own pure-perl implementation, which is |
837 | pure-perl implementation, which is available everywhere as it comes with |
813 | available everywhere as it comes with AnyEvent itself. |
838 | AnyEvent itself. |
814 | |
839 | |
815 | AnyEvent::Impl::EV based on EV (interface to libev, best choice). |
840 | AnyEvent::Impl::EV based on EV (interface to libev, best choice). |
816 | AnyEvent::Impl::Event based on Event, very stable, few glitches. |
|
|
817 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
841 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
818 | |
842 | |
819 | =item Backends that are transparently being picked up when they are used. |
843 | =item Backends that are transparently being picked up when they are used. |
820 | |
844 | |
821 | These will be used when they are currently loaded when the first watcher |
845 | These will be used when they are currently loaded when the first watcher |
822 | is created, in which case it is assumed that the application is using |
846 | is created, in which case it is assumed that the application is using |
823 | them. This means that AnyEvent will automatically pick the right backend |
847 | them. This means that AnyEvent will automatically pick the right backend |
824 | when the main program loads an event module before anything starts to |
848 | when the main program loads an event module before anything starts to |
825 | create watchers. Nothing special needs to be done by the main program. |
849 | create watchers. Nothing special needs to be done by the main program. |
826 | |
850 | |
|
|
851 | AnyEvent::Impl::Event based on Event, very stable, few glitches. |
827 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
852 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
828 | AnyEvent::Impl::Tk based on Tk, very broken. |
853 | AnyEvent::Impl::Tk based on Tk, very broken. |
829 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
854 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
830 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
855 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
831 | AnyEvent::Impl::Irssi used when running within irssi. |
856 | AnyEvent::Impl::Irssi used when running within irssi. |
… | |
… | |
1105 | |
1130 | |
1106 | package AnyEvent; |
1131 | package AnyEvent; |
1107 | |
1132 | |
1108 | # basically a tuned-down version of common::sense |
1133 | # basically a tuned-down version of common::sense |
1109 | sub common_sense { |
1134 | sub common_sense { |
1110 | # no warnings |
1135 | # from common:.sense 1.0 |
1111 | ${^WARNING_BITS} ^= ${^WARNING_BITS}; |
1136 | ${^WARNING_BITS} = "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03"; |
1112 | # use strict vars subs |
1137 | # use strict vars subs |
1113 | $^H |= 0x00000600; |
1138 | $^H |= 0x00000600; |
1114 | } |
1139 | } |
1115 | |
1140 | |
1116 | BEGIN { AnyEvent::common_sense } |
1141 | BEGIN { AnyEvent::common_sense } |
1117 | |
1142 | |
1118 | use Carp (); |
1143 | use Carp (); |
1119 | |
1144 | |
1120 | our $VERSION = 4.901; |
1145 | our $VERSION = '5.21'; |
1121 | our $MODEL; |
1146 | our $MODEL; |
1122 | |
1147 | |
1123 | our $AUTOLOAD; |
1148 | our $AUTOLOAD; |
1124 | our @ISA; |
1149 | our @ISA; |
1125 | |
1150 | |
1126 | our @REGISTRY; |
1151 | our @REGISTRY; |
1127 | |
|
|
1128 | our $WIN32; |
|
|
1129 | |
1152 | |
1130 | our $VERBOSE; |
1153 | our $VERBOSE; |
1131 | |
1154 | |
1132 | BEGIN { |
1155 | BEGIN { |
1133 | eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }"; |
1156 | eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }"; |
… | |
… | |
1151 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1174 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1152 | } |
1175 | } |
1153 | |
1176 | |
1154 | my @models = ( |
1177 | my @models = ( |
1155 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1178 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1156 | [Event:: => AnyEvent::Impl::Event::, 1], |
|
|
1157 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], |
1179 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], |
1158 | # everything below here will not (normally) be autoprobed |
1180 | # everything below here will not (normally) be autoprobed |
1159 | # as the pureperl backend should work everywhere |
1181 | # as the pureperl backend should work everywhere |
1160 | # and is usually faster |
1182 | # and is usually faster |
|
|
1183 | [Event:: => AnyEvent::Impl::Event::, 1], |
1161 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1184 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1162 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1185 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1163 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
1186 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
1164 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1187 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1165 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1188 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
… | |
… | |
1168 | [Prima:: => AnyEvent::Impl::POE::], |
1191 | [Prima:: => AnyEvent::Impl::POE::], |
1169 | # IO::Async is just too broken - we would need workarounds for its |
1192 | # IO::Async is just too broken - we would need workarounds for its |
1170 | # byzantine signal and broken child handling, among others. |
1193 | # byzantine signal and broken child handling, among others. |
1171 | # IO::Async is rather hard to detect, as it doesn't have any |
1194 | # IO::Async is rather hard to detect, as it doesn't have any |
1172 | # obvious default class. |
1195 | # obvious default class. |
1173 | # [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1196 | [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1174 | # [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1197 | [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1175 | # [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1198 | [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
|
|
1199 | [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1176 | ); |
1200 | ); |
1177 | |
1201 | |
1178 | our %method = map +($_ => 1), |
1202 | our %method = map +($_ => 1), |
1179 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1203 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1180 | |
1204 | |
… | |
… | |
1287 | # we assume CLOEXEC is already set by perl in all important cases |
1311 | # we assume CLOEXEC is already set by perl in all important cases |
1288 | |
1312 | |
1289 | ($fh2, $rw) |
1313 | ($fh2, $rw) |
1290 | } |
1314 | } |
1291 | |
1315 | |
|
|
1316 | =head1 SIMPLIFIED AE API |
|
|
1317 | |
|
|
1318 | Starting with version 5.0, AnyEvent officially supports a second, much |
|
|
1319 | simpler, API that is designed to reduce the calling, typing and memory |
|
|
1320 | overhead. |
|
|
1321 | |
|
|
1322 | See the L<AE> manpage for details. |
|
|
1323 | |
|
|
1324 | =cut |
|
|
1325 | |
|
|
1326 | package AE; |
|
|
1327 | |
|
|
1328 | our $VERSION = $AnyEvent::VERSION; |
|
|
1329 | |
|
|
1330 | sub io($$$) { |
|
|
1331 | AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) |
|
|
1332 | } |
|
|
1333 | |
|
|
1334 | sub timer($$$) { |
|
|
1335 | AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]) |
|
|
1336 | } |
|
|
1337 | |
|
|
1338 | sub signal($$) { |
|
|
1339 | AnyEvent->signal (signal => $_[0], cb => $_[1]) |
|
|
1340 | } |
|
|
1341 | |
|
|
1342 | sub child($$) { |
|
|
1343 | AnyEvent->child (pid => $_[0], cb => $_[1]) |
|
|
1344 | } |
|
|
1345 | |
|
|
1346 | sub idle($) { |
|
|
1347 | AnyEvent->idle (cb => $_[0]) |
|
|
1348 | } |
|
|
1349 | |
|
|
1350 | sub cv(;&) { |
|
|
1351 | AnyEvent->condvar (@_ ? (cb => $_[0]) : ()) |
|
|
1352 | } |
|
|
1353 | |
|
|
1354 | sub now() { |
|
|
1355 | AnyEvent->now |
|
|
1356 | } |
|
|
1357 | |
|
|
1358 | sub now_update() { |
|
|
1359 | AnyEvent->now_update |
|
|
1360 | } |
|
|
1361 | |
|
|
1362 | sub time() { |
|
|
1363 | AnyEvent->time |
|
|
1364 | } |
|
|
1365 | |
1292 | package AnyEvent::Base; |
1366 | package AnyEvent::Base; |
1293 | |
1367 | |
1294 | # default implementations for many methods |
1368 | # default implementations for many methods |
1295 | |
1369 | |
1296 | sub _time { |
1370 | sub _time() { |
1297 | # probe for availability of Time::HiRes |
1371 | # probe for availability of Time::HiRes |
1298 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1372 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1299 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1373 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1300 | *_time = \&Time::HiRes::time; |
1374 | *_time = \&Time::HiRes::time; |
1301 | # if (eval "use POSIX (); (POSIX::times())... |
1375 | # if (eval "use POSIX (); (POSIX::times())... |
… | |
… | |
1321 | |
1395 | |
1322 | our $HAVE_ASYNC_INTERRUPT; |
1396 | our $HAVE_ASYNC_INTERRUPT; |
1323 | |
1397 | |
1324 | sub _have_async_interrupt() { |
1398 | sub _have_async_interrupt() { |
1325 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
1399 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
1326 | && eval "use Async::Interrupt 1.0 (); 1") |
1400 | && eval "use Async::Interrupt 1.02 (); 1") |
1327 | unless defined $HAVE_ASYNC_INTERRUPT; |
1401 | unless defined $HAVE_ASYNC_INTERRUPT; |
1328 | |
1402 | |
1329 | $HAVE_ASYNC_INTERRUPT |
1403 | $HAVE_ASYNC_INTERRUPT |
1330 | } |
1404 | } |
1331 | |
1405 | |
… | |
… | |
1334 | our ($SIG_COUNT, $SIG_TW); |
1408 | our ($SIG_COUNT, $SIG_TW); |
1335 | |
1409 | |
1336 | sub _signal_exec { |
1410 | sub _signal_exec { |
1337 | $HAVE_ASYNC_INTERRUPT |
1411 | $HAVE_ASYNC_INTERRUPT |
1338 | ? $SIGPIPE_R->drain |
1412 | ? $SIGPIPE_R->drain |
1339 | : sysread $SIGPIPE_R, my $dummy, 9; |
1413 | : sysread $SIGPIPE_R, (my $dummy), 9; |
1340 | |
1414 | |
1341 | while (%SIG_EV) { |
1415 | while (%SIG_EV) { |
1342 | for (keys %SIG_EV) { |
1416 | for (keys %SIG_EV) { |
1343 | delete $SIG_EV{$_}; |
1417 | delete $SIG_EV{$_}; |
1344 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1418 | $_->() for values %{ $SIG_CB{$_} || {} }; |
… | |
… | |
1348 | |
1422 | |
1349 | # install a dummy wakeup watcher to reduce signal catching latency |
1423 | # install a dummy wakeup watcher to reduce signal catching latency |
1350 | sub _sig_add() { |
1424 | sub _sig_add() { |
1351 | unless ($SIG_COUNT++) { |
1425 | unless ($SIG_COUNT++) { |
1352 | # try to align timer on a full-second boundary, if possible |
1426 | # try to align timer on a full-second boundary, if possible |
1353 | my $NOW = AnyEvent->now; |
1427 | my $NOW = AE::now; |
1354 | |
1428 | |
1355 | $SIG_TW = AnyEvent->timer ( |
1429 | $SIG_TW = AE::timer |
1356 | after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1430 | $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1357 | interval => $MAX_SIGNAL_LATENCY, |
1431 | $MAX_SIGNAL_LATENCY, |
1358 | cb => sub { }, # just for the PERL_ASYNC_CHECK |
1432 | sub { } # just for the PERL_ASYNC_CHECK |
1359 | ); |
1433 | ; |
1360 | } |
1434 | } |
1361 | } |
1435 | } |
1362 | |
1436 | |
1363 | sub _sig_del { |
1437 | sub _sig_del { |
1364 | undef $SIG_TW |
1438 | undef $SIG_TW |
… | |
… | |
1401 | # probe for availability of Async::Interrupt |
1475 | # probe for availability of Async::Interrupt |
1402 | if (_have_async_interrupt) { |
1476 | if (_have_async_interrupt) { |
1403 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
1477 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
1404 | |
1478 | |
1405 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
1479 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
1406 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec); |
1480 | $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; |
1407 | |
1481 | |
1408 | } else { |
1482 | } else { |
1409 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
1483 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
1410 | |
1484 | |
1411 | require Fcntl; |
1485 | require Fcntl; |
… | |
… | |
1427 | } |
1501 | } |
1428 | |
1502 | |
1429 | $SIGPIPE_R |
1503 | $SIGPIPE_R |
1430 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
1504 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
1431 | |
1505 | |
1432 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec); |
1506 | $SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec; |
1433 | } |
1507 | } |
1434 | |
1508 | |
1435 | *signal = sub { |
1509 | *signal = sub { |
1436 | my (undef, %arg) = @_; |
1510 | my (undef, %arg) = @_; |
1437 | |
1511 | |
… | |
… | |
1526 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1600 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1527 | ? 1 |
1601 | ? 1 |
1528 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1602 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1529 | |
1603 | |
1530 | unless ($CHLD_W) { |
1604 | unless ($CHLD_W) { |
1531 | $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld); |
1605 | $CHLD_W = AE::signal CHLD => \&_sigchld; |
1532 | # child could be a zombie already, so make at least one round |
1606 | # child could be a zombie already, so make at least one round |
1533 | &_sigchld; |
1607 | &_sigchld; |
1534 | } |
1608 | } |
1535 | |
1609 | |
1536 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
1610 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
… | |
… | |
1562 | # never use more then 50% of the time for the idle watcher, |
1636 | # never use more then 50% of the time for the idle watcher, |
1563 | # within some limits |
1637 | # within some limits |
1564 | $w = 0.0001 if $w < 0.0001; |
1638 | $w = 0.0001 if $w < 0.0001; |
1565 | $w = 5 if $w > 5; |
1639 | $w = 5 if $w > 5; |
1566 | |
1640 | |
1567 | $w = AnyEvent->timer (after => $w, cb => $rcb); |
1641 | $w = AE::timer $w, 0, $rcb; |
1568 | } else { |
1642 | } else { |
1569 | # clean up... |
1643 | # clean up... |
1570 | undef $w; |
1644 | undef $w; |
1571 | undef $rcb; |
1645 | undef $rcb; |
1572 | } |
1646 | } |
1573 | }; |
1647 | }; |
1574 | |
1648 | |
1575 | $w = AnyEvent->timer (after => 0.05, cb => $rcb); |
1649 | $w = AE::timer 0.05, 0, $rcb; |
1576 | |
1650 | |
1577 | bless \\$cb, "AnyEvent::Base::idle" |
1651 | bless \\$cb, "AnyEvent::Base::idle" |
1578 | } |
1652 | } |
1579 | |
1653 | |
1580 | sub AnyEvent::Base::idle::DESTROY { |
1654 | sub AnyEvent::Base::idle::DESTROY { |
… | |
… | |
1657 | } |
1731 | } |
1658 | |
1732 | |
1659 | # undocumented/compatibility with pre-3.4 |
1733 | # undocumented/compatibility with pre-3.4 |
1660 | *broadcast = \&send; |
1734 | *broadcast = \&send; |
1661 | *wait = \&_wait; |
1735 | *wait = \&_wait; |
1662 | |
|
|
1663 | ############################################################################# |
|
|
1664 | # "new" API, currently only emulation of it |
|
|
1665 | ############################################################################# |
|
|
1666 | |
|
|
1667 | package AE; |
|
|
1668 | |
|
|
1669 | sub io($$$) { |
|
|
1670 | AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) |
|
|
1671 | } |
|
|
1672 | |
|
|
1673 | sub timer($$$) { |
|
|
1674 | AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]); |
|
|
1675 | } |
|
|
1676 | |
|
|
1677 | sub signal($$) { |
|
|
1678 | AnyEvent->signal (signal => $_[0], cb => $_[1]); |
|
|
1679 | } |
|
|
1680 | |
|
|
1681 | sub child($$) { |
|
|
1682 | AnyEvent->child (pid => $_[0], cb => $_[1]); |
|
|
1683 | } |
|
|
1684 | |
|
|
1685 | sub idle($) { |
|
|
1686 | AnyEvent->idle (cb => $_[0]); |
|
|
1687 | } |
|
|
1688 | |
|
|
1689 | sub cv() { |
|
|
1690 | AnyEvent->condvar |
|
|
1691 | } |
|
|
1692 | |
|
|
1693 | sub now() { |
|
|
1694 | AnyEvent->now |
|
|
1695 | } |
|
|
1696 | |
|
|
1697 | sub now_update() { |
|
|
1698 | AnyEvent->now_update |
|
|
1699 | } |
|
|
1700 | |
|
|
1701 | sub time() { |
|
|
1702 | AnyEvent->time |
|
|
1703 | } |
|
|
1704 | |
1736 | |
1705 | =head1 ERROR AND EXCEPTION HANDLING |
1737 | =head1 ERROR AND EXCEPTION HANDLING |
1706 | |
1738 | |
1707 | In general, AnyEvent does not do any error handling - it relies on the |
1739 | In general, AnyEvent does not do any error handling - it relies on the |
1708 | caller to do that if required. The L<AnyEvent::Strict> module (see also |
1740 | caller to do that if required. The L<AnyEvent::Strict> module (see also |
… | |
… | |
1902 | warn "read: $input\n"; # output what has been read |
1934 | warn "read: $input\n"; # output what has been read |
1903 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1935 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1904 | }, |
1936 | }, |
1905 | ); |
1937 | ); |
1906 | |
1938 | |
1907 | my $time_watcher; # can only be used once |
|
|
1908 | |
|
|
1909 | sub new_timer { |
|
|
1910 | $timer = AnyEvent->timer (after => 1, cb => sub { |
1939 | my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub { |
1911 | warn "timeout\n"; # print 'timeout' about every second |
1940 | warn "timeout\n"; # print 'timeout' at most every second |
1912 | &new_timer; # and restart the time |
|
|
1913 | }); |
1941 | }); |
1914 | } |
|
|
1915 | |
|
|
1916 | new_timer; # create first timer |
|
|
1917 | |
1942 | |
1918 | $cv->recv; # wait until user enters /^q/i |
1943 | $cv->recv; # wait until user enters /^q/i |
1919 | |
1944 | |
1920 | =head1 REAL-WORLD EXAMPLE |
1945 | =head1 REAL-WORLD EXAMPLE |
1921 | |
1946 | |
… | |
… | |
2052 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
2077 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
2053 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
2078 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
2054 | which it is), lets them fire exactly once and destroys them again. |
2079 | which it is), lets them fire exactly once and destroys them again. |
2055 | |
2080 | |
2056 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
2081 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
2057 | distribution. |
2082 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2083 | for the EV and Perl backends only. |
2058 | |
2084 | |
2059 | =head3 Explanation of the columns |
2085 | =head3 Explanation of the columns |
2060 | |
2086 | |
2061 | I<watcher> is the number of event watchers created/destroyed. Since |
2087 | I<watcher> is the number of event watchers created/destroyed. Since |
2062 | different event models feature vastly different performances, each event |
2088 | different event models feature vastly different performances, each event |
… | |
… | |
2083 | watcher. |
2109 | watcher. |
2084 | |
2110 | |
2085 | =head3 Results |
2111 | =head3 Results |
2086 | |
2112 | |
2087 | name watchers bytes create invoke destroy comment |
2113 | name watchers bytes create invoke destroy comment |
2088 | EV/EV 400000 224 0.47 0.35 0.27 EV native interface |
2114 | EV/EV 100000 223 0.47 0.43 0.27 EV native interface |
2089 | EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers |
2115 | EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers |
2090 | CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal |
2116 | Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal |
2091 | Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation |
2117 | Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation |
2092 | Event/Event 16000 517 32.20 31.80 0.81 Event native interface |
2118 | Event/Event 16000 516 31.16 31.84 0.82 Event native interface |
2093 | Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers |
2119 | Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers |
2094 | IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll |
2120 | IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll |
2095 | IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll |
2121 | IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll |
2096 | Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour |
2122 | Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour |
2097 | Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers |
2123 | Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers |
2098 | POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event |
2124 | POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event |
2099 | POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select |
2125 | POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select |
2100 | |
2126 | |
2101 | =head3 Discussion |
2127 | =head3 Discussion |
2102 | |
2128 | |
2103 | The benchmark does I<not> measure scalability of the event loop very |
2129 | The benchmark does I<not> measure scalability of the event loop very |
2104 | well. For example, a select-based event loop (such as the pure perl one) |
2130 | well. For example, a select-based event loop (such as the pure perl one) |
… | |
… | |
2116 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
2142 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
2117 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
2143 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
2118 | cycles with POE. |
2144 | cycles with POE. |
2119 | |
2145 | |
2120 | C<EV> is the sole leader regarding speed and memory use, which are both |
2146 | C<EV> is the sole leader regarding speed and memory use, which are both |
2121 | maximal/minimal, respectively. Even when going through AnyEvent, it uses |
2147 | maximal/minimal, respectively. When using the L<AE> API there is zero |
|
|
2148 | overhead (when going through the AnyEvent API create is about 5-6 times |
|
|
2149 | slower, with other times being equal, so still uses far less memory than |
2122 | far less memory than any other event loop and is still faster than Event |
2150 | any other event loop and is still faster than Event natively). |
2123 | natively. |
|
|
2124 | |
2151 | |
2125 | The pure perl implementation is hit in a few sweet spots (both the |
2152 | The pure perl implementation is hit in a few sweet spots (both the |
2126 | constant timeout and the use of a single fd hit optimisations in the perl |
2153 | constant timeout and the use of a single fd hit optimisations in the perl |
2127 | interpreter and the backend itself). Nevertheless this shows that it |
2154 | interpreter and the backend itself). Nevertheless this shows that it |
2128 | adds very little overhead in itself. Like any select-based backend its |
2155 | adds very little overhead in itself. Like any select-based backend its |
… | |
… | |
2202 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2229 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2203 | (1%) are active. This mirrors the activity of large servers with many |
2230 | (1%) are active. This mirrors the activity of large servers with many |
2204 | connections, most of which are idle at any one point in time. |
2231 | connections, most of which are idle at any one point in time. |
2205 | |
2232 | |
2206 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2233 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2207 | distribution. |
2234 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2235 | for the EV and Perl backends only. |
2208 | |
2236 | |
2209 | =head3 Explanation of the columns |
2237 | =head3 Explanation of the columns |
2210 | |
2238 | |
2211 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2239 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2212 | each server has a read and write socket end). |
2240 | each server has a read and write socket end). |
… | |
… | |
2220 | a new one that moves the timeout into the future. |
2248 | a new one that moves the timeout into the future. |
2221 | |
2249 | |
2222 | =head3 Results |
2250 | =head3 Results |
2223 | |
2251 | |
2224 | name sockets create request |
2252 | name sockets create request |
2225 | EV 20000 69.01 11.16 |
2253 | EV 20000 62.66 7.99 |
2226 | Perl 20000 73.32 35.87 |
2254 | Perl 20000 68.32 32.64 |
2227 | IOAsync 20000 157.00 98.14 epoll |
2255 | IOAsync 20000 174.06 101.15 epoll |
2228 | IOAsync 20000 159.31 616.06 poll |
2256 | IOAsync 20000 174.67 610.84 poll |
2229 | Event 20000 212.62 257.32 |
2257 | Event 20000 202.69 242.91 |
2230 | Glib 20000 651.16 1896.30 |
2258 | Glib 20000 557.01 1689.52 |
2231 | POE 20000 349.67 12317.24 uses POE::Loop::Event |
2259 | POE 20000 341.54 12086.32 uses POE::Loop::Event |
2232 | |
2260 | |
2233 | =head3 Discussion |
2261 | =head3 Discussion |
2234 | |
2262 | |
2235 | This benchmark I<does> measure scalability and overall performance of the |
2263 | This benchmark I<does> measure scalability and overall performance of the |
2236 | particular event loop. |
2264 | particular event loop. |
… | |
… | |
2362 | As you can see, the AnyEvent + EV combination even beats the |
2390 | As you can see, the AnyEvent + EV combination even beats the |
2363 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2391 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2364 | backend easily beats IO::Lambda and POE. |
2392 | backend easily beats IO::Lambda and POE. |
2365 | |
2393 | |
2366 | And even the 100% non-blocking version written using the high-level (and |
2394 | And even the 100% non-blocking version written using the high-level (and |
2367 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a |
2395 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda |
2368 | large margin, even though it does all of DNS, tcp-connect and socket I/O |
2396 | higher level ("unoptimised") abstractions by a large margin, even though |
2369 | in a non-blocking way. |
2397 | it does all of DNS, tcp-connect and socket I/O in a non-blocking way. |
2370 | |
2398 | |
2371 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2399 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2372 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2400 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2373 | part of the IO::lambda distribution and were used without any changes. |
2401 | part of the IO::Lambda distribution and were used without any changes. |
2374 | |
2402 | |
2375 | |
2403 | |
2376 | =head1 SIGNALS |
2404 | =head1 SIGNALS |
2377 | |
2405 | |
2378 | AnyEvent currently installs handlers for these signals: |
2406 | AnyEvent currently installs handlers for these signals: |
… | |
… | |
2467 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2495 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2468 | purely used for performance. |
2496 | purely used for performance. |
2469 | |
2497 | |
2470 | =item L<JSON> and L<JSON::XS> |
2498 | =item L<JSON> and L<JSON::XS> |
2471 | |
2499 | |
2472 | This module is required when you want to read or write JSON data via |
2500 | One of these modules is required when you want to read or write JSON data |
2473 | L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2501 | via L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2474 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2502 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2475 | |
2503 | |
2476 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2504 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2477 | installed. |
2505 | installed. |
2478 | |
2506 | |