[ViewVC] Diff of: cvs/AnyEvent/lib/AnyEvent.pm

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.259 by root, Tue Jul 28 02:07:18 2009 UTC vs.
Revision 1.297 by root, Thu Nov 19 01:55:57 2009 UTC

…		…
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
…		…
349	might affect timers and time-outs.	363	might affect timers and time-outs.
350		364
351	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
352	event loop's idea of "current time".	366	event loop's idea of "current time".
353		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
354	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.
355		376
356	=back	377	=back
357		378
358	=head2 SIGNAL WATCHERS	379	=head2 SIGNAL WATCHERS
		380
		381	$w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>);
359		382
360	You can watch for signals using a signal watcher, C<signal> is the signal	383	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	384	I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl
362	callback to be invoked whenever a signal occurs.	385	callback to be invoked whenever a signal occurs.
363		386
…		…
383	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });	406	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
384		407
385	=head3 Signal Races, Delays and Workarounds	408	=head3 Signal Races, Delays and Workarounds
386		409
387	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching	410	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching
388	callbacks to signals in a generic way, which is a pity, as you cannot do	411	callbacks to signals in a generic way, which is a pity, as you cannot
389	race-free signal handling in perl. AnyEvent will try to do it's best, but	412	do race-free signal handling in perl, requiring C libraries for
		413	this. AnyEvent will try to do it's best, which means in some cases,
390	in some cases, signals will be delayed. The maximum time a signal might	414	signals will be delayed. The maximum time a signal might be delayed is
391	be delayed is specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10	415	specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This
392	seconds). This variable can be changed only before the first signal	416	variable can be changed only before the first signal watcher is created,
393	watcher is created, and should be left alone otherwise. Higher values	417	and should be left alone otherwise. This variable determines how often
		418	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	419	will cause fewer spurious wake-ups, which is better for power and CPU
		420	saving.
		421
395	saving. All these problems can be avoided by installing the optional	422	All these problems can be avoided by installing the optional
396	L<Async::Interrupt> module. This will not work with inherently broken	423	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>	424	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	425	(and not with L<POE> currently, as POE does it's own workaround with
399	those, you just have to suffer the delays.	426	one-second latency). For those, you just have to suffer the delays.
400		427
401	=head2 CHILD PROCESS WATCHERS	428	=head2 CHILD PROCESS WATCHERS
		429
		430	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
402		431
403	You can also watch on a child process exit and catch its exit status.	432	You can also watch on a child process exit and catch its exit status.
404		433
405	The child process is specified by the C<pid> argument (one some backends,	434	The child process is specified by the C<pid> argument (one some backends,
406	using C<0> watches for any child process exit, on others this will	435	using C<0> watches for any child process exit, on others this will
…		…
455	# do something else, then wait for process exit	484	# do something else, then wait for process exit
456	$done->recv;	485	$done->recv;
457		486
458	=head2 IDLE WATCHERS	487	=head2 IDLE WATCHERS
459		488
		489	$w = AnyEvent->idle (cb => <callback>);
		490
460	Sometimes there is a need to do something, but it is not so important	491	Sometimes there is a need to do something, but it is not so important
461	to do it instantly, but only when there is nothing better to do. This	492	to do it instantly, but only when there is nothing better to do. This
462	"nothing better to do" is usually defined to be "no other events need	493	"nothing better to do" is usually defined to be "no other events need
463	attention by the event loop".	494	attention by the event loop".
464		495
…		…
490	});	521	});
491	});	522	});
492		523
493	=head2 CONDITION VARIABLES	524	=head2 CONDITION VARIABLES
494		525
		526	$cv = AnyEvent->condvar;
		527
		528	$cv->send (<list>);
		529	my @res = $cv->recv;
		530
495	If you are familiar with some event loops you will know that all of them	531	If you are familiar with some event loops you will know that all of them
496	require you to run some blocking "loop", "run" or similar function that	532	require you to run some blocking "loop", "run" or similar function that
497	will actively watch for new events and call your callbacks.	533	will actively watch for new events and call your callbacks.
498		534
499	AnyEvent is slightly different: it expects somebody else to run the event	535	AnyEvent is slightly different: it expects somebody else to run the event
…		…
563	after => 1,	599	after => 1,
564	cb => sub { $result_ready->send },	600	cb => sub { $result_ready->send },
565	);	601	);
566		602
567	# this "blocks" (while handling events) till the callback	603	# this "blocks" (while handling events) till the callback
568	# calls -<send	604	# calls ->send
569	$result_ready->recv;	605	$result_ready->recv;
570		606
571	Example: wait for a timer, but take advantage of the fact that condition	607	Example: wait for a timer, but take advantage of the fact that condition
572	variables are also callable directly.	608	variables are also callable directly.
573		609
…		…
637	one. For example, a function that pings many hosts in parallel might want	673	one. For example, a function that pings many hosts in parallel might want
638	to use a condition variable for the whole process.	674	to use a condition variable for the whole process.
639		675
640	Every call to C<< ->begin >> will increment a counter, and every call to	676	Every call to C<< ->begin >> will increment a counter, and every call to
641	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end	677	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end
642	>>, the (last) callback passed to C<begin> will be executed. That callback	678	>>, the (last) callback passed to C<begin> will be executed, passing the
643	is I<supposed> to call C<< ->send >>, but that is not required. If no	679	condvar as first argument. That callback is I<supposed> to call C<< ->send
644	callback was set, C<send> will be called without any arguments.	680	>>, but that is not required. If no group callback was set, C<send> will
		681	be called without any arguments.
645		682
646	You can think of C<< $cv->send >> giving you an OR condition (one call	683	You can think of C<< $cv->send >> giving you an OR condition (one call
647	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND	684	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND
648	condition (all C<begin> calls must be C<end>'ed before the condvar sends).	685	condition (all C<begin> calls must be C<end>'ed before the condvar sends).
649		686
…		…
676	begung can potentially be zero:	713	begung can potentially be zero:
677		714
678	my $cv = AnyEvent->condvar;	715	my $cv = AnyEvent->condvar;
679		716
680	my %result;	717	my %result;
681	$cv->begin (sub { $cv->send (\%result) });	718	$cv->begin (sub { shift->send (\%result) });
682		719
683	for my $host (@list_of_hosts) {	720	for my $host (@list_of_hosts) {
684	$cv->begin;	721	$cv->begin;
685	ping_host_then_call_callback $host, sub {	722	ping_host_then_call_callback $host, sub {
686	$result{$host} = ...;	723	$result{$host} = ...;
…		…
761	=item $cb = $cv->cb ($cb->($cv))	798	=item $cb = $cv->cb ($cb->($cv))
762		799
763	This is a mutator function that returns the callback set and optionally	800	This is a mutator function that returns the callback set and optionally
764	replaces it before doing so.	801	replaces it before doing so.
765		802
766	The callback will be called when the condition becomes "true", i.e. when	803	The callback will be called when the condition becomes (or already was)
767	C<send> or C<croak> are called, with the only argument being the condition	804	"true", i.e. when C<send> or C<croak> are called (or were called), with
768	variable itself. Calling C<recv> inside the callback or at any later time	805	the only argument being the condition variable itself. Calling C<recv>
769	is guaranteed not to block.	806	inside the callback or at any later time is guaranteed not to block.
770		807
771	=back	808	=back
772		809
773	=head1 SUPPORTED EVENT LOOPS/BACKENDS	810	=head1 SUPPORTED EVENT LOOPS/BACKENDS
774		811
…		…
777	=over 4	814	=over 4
778		815
779	=item Backends that are autoprobed when no other event loop can be found.	816	=item Backends that are autoprobed when no other event loop can be found.
780		817
781	EV is the preferred backend when no other event loop seems to be in	818	EV is the preferred backend when no other event loop seems to be in
782	use. If EV is not installed, then AnyEvent will try Event, and, failing	819	use. If EV is not installed, then AnyEvent will fall back to its own
783	that, will fall back to its own pure-perl implementation, which is	820	pure-perl implementation, which is available everywhere as it comes with
784	available everywhere as it comes with AnyEvent itself.	821	AnyEvent itself.
785		822
786	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	823	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
787	AnyEvent::Impl::Event based on Event, very stable, few glitches.
788	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	824	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.
789		825
790	=item Backends that are transparently being picked up when they are used.	826	=item Backends that are transparently being picked up when they are used.
791		827
792	These will be used when they are currently loaded when the first watcher	828	These will be used when they are currently loaded when the first watcher
793	is created, in which case it is assumed that the application is using	829	is created, in which case it is assumed that the application is using
794	them. This means that AnyEvent will automatically pick the right backend	830	them. This means that AnyEvent will automatically pick the right backend
795	when the main program loads an event module before anything starts to	831	when the main program loads an event module before anything starts to
796	create watchers. Nothing special needs to be done by the main program.	832	create watchers. Nothing special needs to be done by the main program.
797		833
		834	AnyEvent::Impl::Event based on Event, very stable, few glitches.
798	AnyEvent::Impl::Glib based on Glib, slow but very stable.	835	AnyEvent::Impl::Glib based on Glib, slow but very stable.
799	AnyEvent::Impl::Tk based on Tk, very broken.	836	AnyEvent::Impl::Tk based on Tk, very broken.
800	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	837	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
801	AnyEvent::Impl::POE based on POE, very slow, some limitations.	838	AnyEvent::Impl::POE based on POE, very slow, some limitations.
802	AnyEvent::Impl::Irssi used when running within irssi.	839	AnyEvent::Impl::Irssi used when running within irssi.
…		…
1076		1113
1077	package AnyEvent;	1114	package AnyEvent;
1078		1115
1079	# basically a tuned-down version of common::sense	1116	# basically a tuned-down version of common::sense
1080	sub common_sense {	1117	sub common_sense {
1081	# no warnings	1118	# from common:.sense 1.0
1082	${^WARNING_BITS} ^= ${^WARNING_BITS};	1119	${^WARNING_BITS} = "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03";
1083	# use strict vars subs	1120	# use strict vars subs
1084	$^H \|= 0x00000600;	1121	$^H \|= 0x00000600;
1085	}	1122	}
1086		1123
1087	BEGIN { AnyEvent::common_sense }	1124	BEGIN { AnyEvent::common_sense }
1088		1125
1089	use Carp ();	1126	use Carp ();
1090		1127
1091	our $VERSION = 4.88;	1128	our $VERSION = '5.21';
1092	our $MODEL;	1129	our $MODEL;
1093		1130
1094	our $AUTOLOAD;	1131	our $AUTOLOAD;
1095	our @ISA;	1132	our @ISA;
1096		1133
1097	our @REGISTRY;	1134	our @REGISTRY;
1098
1099	our $WIN32;
1100		1135
1101	our $VERBOSE;	1136	our $VERBOSE;
1102		1137
1103	BEGIN {	1138	BEGIN {
1104	eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }";	1139	eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }";
…		…
1122	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1157	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1123	}	1158	}
1124		1159
1125	my @models = (	1160	my @models = (
1126	[EV:: => AnyEvent::Impl::EV:: , 1],	1161	[EV:: => AnyEvent::Impl::EV:: , 1],
1127	[Event:: => AnyEvent::Impl::Event::, 1],
1128	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1162	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],
1129	# everything below here will not (normally) be autoprobed	1163	# everything below here will not (normally) be autoprobed
1130	# as the pureperl backend should work everywhere	1164	# as the pureperl backend should work everywhere
1131	# and is usually faster	1165	# and is usually faster
		1166	[Event:: => AnyEvent::Impl::Event::, 1],
1132	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1167	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1133	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1168	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1134	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package	1169	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1135	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1170	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1136	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1171	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
…		…
1139	[Prima:: => AnyEvent::Impl::POE::],	1174	[Prima:: => AnyEvent::Impl::POE::],
1140	# IO::Async is just too broken - we would need workarounds for its	1175	# IO::Async is just too broken - we would need workarounds for its
1141	# byzantine signal and broken child handling, among others.	1176	# byzantine signal and broken child handling, among others.
1142	# IO::Async is rather hard to detect, as it doesn't have any	1177	# IO::Async is rather hard to detect, as it doesn't have any
1143	# obvious default class.	1178	# obvious default class.
1144	# [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program	1179	[IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1145	# [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program	1180	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1146	# [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program	1181	[IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
		1182	[AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
1147	);	1183	);
1148		1184
1149	our %method = map +($_ => 1),	1185	our %method = map +($_ => 1),
1150	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1186	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1151		1187
…		…
1258	# we assume CLOEXEC is already set by perl in all important cases	1294	# we assume CLOEXEC is already set by perl in all important cases
1259		1295
1260	($fh2, $rw)	1296	($fh2, $rw)
1261	}	1297	}
1262		1298
		1299	=head1 SIMPLIFIED AE API
		1300
		1301	Starting with version 5.0, AnyEvent officially supports a second, much
		1302	simpler, API that is designed to reduce the calling, typing and memory
		1303	overhead.
		1304
		1305	See the L<AE> manpage for details.
		1306
		1307	=cut
		1308
		1309	package AE;
		1310
		1311	our $VERSION = $AnyEvent::VERSION;
		1312
		1313	sub io($$$) {
		1314	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1315	}
		1316
		1317	sub timer($$$) {
		1318	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
		1319	}
		1320
		1321	sub signal($$) {
		1322	AnyEvent->signal (signal => $_[0], cb => $_[1])
		1323	}
		1324
		1325	sub child($$) {
		1326	AnyEvent->child (pid => $_[0], cb => $_[1])
		1327	}
		1328
		1329	sub idle($) {
		1330	AnyEvent->idle (cb => $_[0])
		1331	}
		1332
		1333	sub cv(;&) {
		1334	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
		1335	}
		1336
		1337	sub now() {
		1338	AnyEvent->now
		1339	}
		1340
		1341	sub now_update() {
		1342	AnyEvent->now_update
		1343	}
		1344
		1345	sub time() {
		1346	AnyEvent->time
		1347	}
		1348
1263	package AnyEvent::Base;	1349	package AnyEvent::Base;
1264		1350
1265	# default implementations for many methods	1351	# default implementations for many methods
1266		1352
1267	sub _time {	1353	sub _time() {
1268	# probe for availability of Time::HiRes	1354	# probe for availability of Time::HiRes
1269	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1355	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1270	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1356	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;
1271	*_time = \&Time::HiRes::time;	1357	*_time = \&Time::HiRes::time;
1272	# if (eval "use POSIX (); (POSIX::times())...	1358	# if (eval "use POSIX (); (POSIX::times())...
…		…
1289	}	1375	}
1290		1376
1291	# default implementation for ->signal	1377	# default implementation for ->signal
1292		1378
1293	our $HAVE_ASYNC_INTERRUPT;	1379	our $HAVE_ASYNC_INTERRUPT;
		1380
		1381	sub _have_async_interrupt() {
		1382	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
		1383	&& eval "use Async::Interrupt 1.02 (); 1")
		1384	unless defined $HAVE_ASYNC_INTERRUPT;
		1385
		1386	$HAVE_ASYNC_INTERRUPT
		1387	}
		1388
1294	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1389	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1295	our (%SIG_ASY, %SIG_ASY_W);	1390	our (%SIG_ASY, %SIG_ASY_W);
1296	our ($SIG_COUNT, $SIG_TW);	1391	our ($SIG_COUNT, $SIG_TW);
1297		1392
1298	sub _signal_exec {	1393	sub _signal_exec {
1299	$HAVE_ASYNC_INTERRUPT	1394	$HAVE_ASYNC_INTERRUPT
1300	? $SIGPIPE_R->drain	1395	? $SIGPIPE_R->drain
1301	: sysread $SIGPIPE_R, my $dummy, 9;	1396	: sysread $SIGPIPE_R, (my $dummy), 9;
1302		1397
1303	while (%SIG_EV) {	1398	while (%SIG_EV) {
1304	for (keys %SIG_EV) {	1399	for (keys %SIG_EV) {
1305	delete $SIG_EV{$_};	1400	delete $SIG_EV{$_};
1306	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1401	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1307	}	1402	}
1308	}	1403	}
1309	}	1404	}
1310		1405
1311	# install a dumym wakeupw atcher to reduce signal catching latency	1406	# install a dummy wakeup watcher to reduce signal catching latency
1312	sub _sig_add() {	1407	sub _sig_add() {
1313	unless ($SIG_COUNT++) {	1408	unless ($SIG_COUNT++) {
1314	# try to align timer on a full-second boundary, if possible	1409	# try to align timer on a full-second boundary, if possible
1315	my $NOW = AnyEvent->now;	1410	my $NOW = AE::now;
1316		1411
1317	$SIG_TW = AnyEvent->timer (	1412	$SIG_TW = AE::timer
1318	after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW),	1413	$MAX_SIGNAL_LATENCY - ($NOW - int $NOW),
1319	interval => $MAX_SIGNAL_LATENCY,	1414	$MAX_SIGNAL_LATENCY,
1320	cb => sub { }, # just for the PERL_ASYNC_CHECK	1415	sub { } # just for the PERL_ASYNC_CHECK
1321	);	1416	;
1322	}	1417	}
1323	}	1418	}
1324		1419
1325	sub _sig_del {	1420	sub _sig_del {
1326	undef $SIG_TW	1421	undef $SIG_TW
1327	unless --$SIG_COUNT;	1422	unless --$SIG_COUNT;
1328	}	1423	}
1329		1424
		1425	our $_sig_name_init; $_sig_name_init = sub {
		1426	eval q{ # poor man's autoloading
		1427	undef $_sig_name_init;
		1428
		1429	if (_have_async_interrupt) {
		1430	*sig2num = \&Async::Interrupt::sig2num;
		1431	*sig2name = \&Async::Interrupt::sig2name;
		1432	} else {
		1433	require Config;
		1434
		1435	my %signame2num;
		1436	@signame2num{ split ' ', $Config::Config{sig_name} }
		1437	= split ' ', $Config::Config{sig_num};
		1438
		1439	my @signum2name;
		1440	@signum2name[values %signame2num] = keys %signame2num;
		1441
		1442	*sig2num = sub($) {
		1443	$_[0] > 0 ? shift : $signame2num{+shift}
		1444	};
		1445	*sig2name = sub ($) {
		1446	$_[0] > 0 ? $signum2name[+shift] : shift
		1447	};
		1448	}
		1449	};
		1450	die if $@;
		1451	};
		1452
		1453	sub sig2num ($) { &$_sig_name_init; &sig2num }
		1454	sub sig2name($) { &$_sig_name_init; &sig2name }
		1455
1330	sub _signal {	1456	sub signal {
		1457	eval q{ # poor man's autoloading {}
		1458	# probe for availability of Async::Interrupt
		1459	if (_have_async_interrupt) {
		1460	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1461
		1462	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1463	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
		1464
		1465	} else {
		1466	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1467
		1468	require Fcntl;
		1469
		1470	if (AnyEvent::WIN32) {
		1471	require AnyEvent::Util;
		1472
		1473	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1474	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1475	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1476	} else {
		1477	pipe $SIGPIPE_R, $SIGPIPE_W;
		1478	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1479	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1480
		1481	# not strictly required, as $^F is normally 2, but let's make sure...
		1482	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1483	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1484	}
		1485
		1486	$SIGPIPE_R
		1487	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1488
		1489	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;
		1490	}
		1491
		1492	*signal = sub {
1331	my (undef, %arg) = @_;	1493	my (undef, %arg) = @_;
1332		1494
1333	my $signal = uc $arg{signal}	1495	my $signal = uc $arg{signal}
1334	or Carp::croak "required option 'signal' is missing";	1496	or Carp::croak "required option 'signal' is missing";
1335		1497
1336	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1337
1338	if ($HAVE_ASYNC_INTERRUPT) {	1498	if ($HAVE_ASYNC_INTERRUPT) {
1339	# async::interrupt	1499	# async::interrupt
1340		1500
1341	$SIG_ASY{$signal} \|\|= do {	1501	$signal = sig2num $signal;
1342	my $asy = new Async::Interrupt	1502	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1503
		1504	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1343	cb => sub { undef $SIG_EV{$signal} },	1505	cb => sub { undef $SIG_EV{$signal} },
1344	signal => $signal,	1506	signal => $signal,
1345	pipe => [$SIGPIPE_R->filenos],	1507	pipe => [$SIGPIPE_R->filenos],
		1508	pipe_autodrain => 0,
		1509	;
		1510
		1511	} else {
		1512	# pure perl
		1513
		1514	# AE::Util has been loaded in signal
		1515	$signal = sig2name $signal;
		1516	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1517
		1518	$SIG{$signal} \|\|= sub {
		1519	local $!;
		1520	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
		1521	undef $SIG_EV{$signal};
		1522	};
		1523
		1524	# can't do signal processing without introducing races in pure perl,
		1525	# so limit the signal latency.
		1526	_sig_add;
1346	;	1527	}
1347	$asy->pipe_autodrain (0);
1348		1528
1349	$asy	1529	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1350	};	1530	};
1351		1531
1352	} else {	1532	*AnyEvent::Base::signal::DESTROY = sub {
1353	# pure perl	1533	my ($signal, $cb) = @{$_[0]};
1354		1534
1355	$SIG{$signal} \|\|= sub {	1535	_sig_del;
1356	local $!;	1536
1357	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1537	delete $SIG_CB{$signal}{$cb};
		1538
		1539	$HAVE_ASYNC_INTERRUPT
		1540	? delete $SIG_ASY{$signal}
		1541	: # delete doesn't work with older perls - they then
		1542	# print weird messages, or just unconditionally exit
		1543	# instead of getting the default action.
1358	undef $SIG_EV{$signal};	1544	undef $SIG{$signal}
		1545	unless keys %{ $SIG_CB{$signal} };
1359	};	1546	};
1360
1361	# can't do signal processing without introducing races in pure perl,
1362	# so limit the signal latency.
1363	_sig_add;
1364	}	1547	};
1365		1548	die if $@;
1366	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1367	}
1368
1369	sub signal {
1370	# probe for availability of Async::Interrupt
1371	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") {
1372	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1373
1374	$HAVE_ASYNC_INTERRUPT = 1;
1375	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1376	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
1377
1378	} else {
1379	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1380
1381	require Fcntl;
1382
1383	if (AnyEvent::WIN32) {
1384	require AnyEvent::Util;
1385
1386	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1387	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1388	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1389	} else {
1390	pipe $SIGPIPE_R, $SIGPIPE_W;
1391	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1392	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1393
1394	# not strictly required, as $^F is normally 2, but let's make sure...
1395	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1396	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1397	}
1398
1399	$SIGPIPE_R
1400	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1401
1402	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1403	}
1404
1405	*signal = \&_signal;
1406	&signal	1549	&signal
1407	}
1408
1409	sub AnyEvent::Base::signal::DESTROY {
1410	my ($signal, $cb) = @{$_[0]};
1411
1412	_sig_del;
1413
1414	delete $SIG_CB{$signal}{$cb};
1415
1416	$HAVE_ASYNC_INTERRUPT
1417	? delete $SIG_ASY{$signal}
1418	: # delete doesn't work with older perls - they then
1419	# print weird messages, or just unconditionally exit
1420	# instead of getting the default action.
1421	undef $SIG{$signal}
1422	unless keys %{ $SIG_CB{$signal} };
1423	}	1550	}
1424		1551
1425	# default implementation for ->child	1552	# default implementation for ->child
1426		1553
1427	our %PID_CB;	1554	our %PID_CB;
…		…
1456	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1583	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1457	? 1	1584	? 1
1458	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1585	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1459		1586
1460	unless ($CHLD_W) {	1587	unless ($CHLD_W) {
1461	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);	1588	$CHLD_W = AE::signal CHLD => \&_sigchld;
1462	# child could be a zombie already, so make at least one round	1589	# child could be a zombie already, so make at least one round
1463	&_sigchld;	1590	&_sigchld;
1464	}	1591	}
1465		1592
1466	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1593	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
…		…
1492	# never use more then 50% of the time for the idle watcher,	1619	# never use more then 50% of the time for the idle watcher,
1493	# within some limits	1620	# within some limits
1494	$w = 0.0001 if $w < 0.0001;	1621	$w = 0.0001 if $w < 0.0001;
1495	$w = 5 if $w > 5;	1622	$w = 5 if $w > 5;
1496		1623
1497	$w = AnyEvent->timer (after => $w, cb => $rcb);	1624	$w = AE::timer $w, 0, $rcb;
1498	} else {	1625	} else {
1499	# clean up...	1626	# clean up...
1500	undef $w;	1627	undef $w;
1501	undef $rcb;	1628	undef $rcb;
1502	}	1629	}
1503	};	1630	};
1504		1631
1505	$w = AnyEvent->timer (after => 0.05, cb => $rcb);	1632	$w = AE::timer 0.05, 0, $rcb;
1506		1633
1507	bless \\$cb, "AnyEvent::Base::idle"	1634	bless \\$cb, "AnyEvent::Base::idle"
1508	}	1635	}
1509		1636
1510	sub AnyEvent::Base::idle::DESTROY {	1637	sub AnyEvent::Base::idle::DESTROY {
…		…
1564	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1691	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};
1565	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1692	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]
1566	}	1693	}
1567		1694
1568	sub cb {	1695	sub cb {
1569	$_[0]{_ae_cb} = $_[1] if @_ > 1;	1696	my $cv = shift;
		1697
		1698	@_
		1699	and $cv->{_ae_cb} = shift
		1700	and $cv->{_ae_sent}
		1701	and (delete $cv->{_ae_cb})->($cv);
		1702
1570	$_[0]{_ae_cb}	1703	$cv->{_ae_cb}
1571	}	1704	}
1572		1705
1573	sub begin {	1706	sub begin {
1574	++$_[0]{_ae_counter};	1707	++$_[0]{_ae_counter};
1575	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;	1708	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;
…		…
1784	warn "read: $input\n"; # output what has been read	1917	warn "read: $input\n"; # output what has been read
1785	$cv->send if $input =~ /^q/i; # quit program if /^q/i	1918	$cv->send if $input =~ /^q/i; # quit program if /^q/i
1786	},	1919	},
1787	);	1920	);
1788		1921
1789	my $time_watcher; # can only be used once
1790
1791	sub new_timer {
1792	$timer = AnyEvent->timer (after => 1, cb => sub {	1922	my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub {
1793	warn "timeout\n"; # print 'timeout' about every second	1923	warn "timeout\n"; # print 'timeout' at most every second
1794	&new_timer; # and restart the time
1795	});	1924	});
1796	}
1797
1798	new_timer; # create first timer
1799		1925
1800	$cv->recv; # wait until user enters /^q/i	1926	$cv->recv; # wait until user enters /^q/i
1801		1927
1802	=head1 REAL-WORLD EXAMPLE	1928	=head1 REAL-WORLD EXAMPLE
1803		1929
…		…
1934	through AnyEvent. The benchmark creates a lot of timers (with a zero	2060	through AnyEvent. The benchmark creates a lot of timers (with a zero
1935	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,	2061	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,
1936	which it is), lets them fire exactly once and destroys them again.	2062	which it is), lets them fire exactly once and destroys them again.
1937		2063
1938	Source code for this benchmark is found as F<eg/bench> in the AnyEvent	2064	Source code for this benchmark is found as F<eg/bench> in the AnyEvent
1939	distribution.	2065	distribution. It uses the L<AE> interface, which makes a real difference
		2066	for the EV and Perl backends only.
1940		2067
1941	=head3 Explanation of the columns	2068	=head3 Explanation of the columns
1942		2069
1943	I<watcher> is the number of event watchers created/destroyed. Since	2070	I<watcher> is the number of event watchers created/destroyed. Since
1944	different event models feature vastly different performances, each event	2071	different event models feature vastly different performances, each event
…		…
1965	watcher.	2092	watcher.
1966		2093
1967	=head3 Results	2094	=head3 Results
1968		2095
1969	name watchers bytes create invoke destroy comment	2096	name watchers bytes create invoke destroy comment
1970	EV/EV 400000 224 0.47 0.35 0.27 EV native interface	2097	EV/EV 100000 223 0.47 0.43 0.27 EV native interface
1971	EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers	2098	EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers
1972	CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal	2099	Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal
1973	Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation	2100	Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation
1974	Event/Event 16000 517 32.20 31.80 0.81 Event native interface	2101	Event/Event 16000 516 31.16 31.84 0.82 Event native interface
1975	Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers	2102	Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers
1976	IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll	2103	IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll
1977	IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll	2104	IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll
1978	Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour	2105	Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour
1979	Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers	2106	Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers
1980	POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event	2107	POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event
1981	POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select	2108	POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select
1982		2109
1983	=head3 Discussion	2110	=head3 Discussion
1984		2111
1985	The benchmark does I<not> measure scalability of the event loop very	2112	The benchmark does I<not> measure scalability of the event loop very
1986	well. For example, a select-based event loop (such as the pure perl one)	2113	well. For example, a select-based event loop (such as the pure perl one)
…		…
1998	benchmark machine, handling an event takes roughly 1600 CPU cycles with	2125	benchmark machine, handling an event takes roughly 1600 CPU cycles with
1999	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU	2126	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU
2000	cycles with POE.	2127	cycles with POE.
2001		2128
2002	C<EV> is the sole leader regarding speed and memory use, which are both	2129	C<EV> is the sole leader regarding speed and memory use, which are both
2003	maximal/minimal, respectively. Even when going through AnyEvent, it uses	2130	maximal/minimal, respectively. When using the L<AE> API there is zero
		2131	overhead (when going through the AnyEvent API create is about 5-6 times
		2132	slower, with other times being equal, so still uses far less memory than
2004	far less memory than any other event loop and is still faster than Event	2133	any other event loop and is still faster than Event natively).
2005	natively.
2006		2134
2007	The pure perl implementation is hit in a few sweet spots (both the	2135	The pure perl implementation is hit in a few sweet spots (both the
2008	constant timeout and the use of a single fd hit optimisations in the perl	2136	constant timeout and the use of a single fd hit optimisations in the perl
2009	interpreter and the backend itself). Nevertheless this shows that it	2137	interpreter and the backend itself). Nevertheless this shows that it
2010	adds very little overhead in itself. Like any select-based backend its	2138	adds very little overhead in itself. Like any select-based backend its
…		…
2084	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100	2212	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100
2085	(1%) are active. This mirrors the activity of large servers with many	2213	(1%) are active. This mirrors the activity of large servers with many
2086	connections, most of which are idle at any one point in time.	2214	connections, most of which are idle at any one point in time.
2087		2215
2088	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent	2216	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent
2089	distribution.	2217	distribution. It uses the L<AE> interface, which makes a real difference
		2218	for the EV and Perl backends only.
2090		2219
2091	=head3 Explanation of the columns	2220	=head3 Explanation of the columns
2092		2221
2093	I<sockets> is the number of sockets, and twice the number of "servers" (as	2222	I<sockets> is the number of sockets, and twice the number of "servers" (as
2094	each server has a read and write socket end).	2223	each server has a read and write socket end).
…		…
2102	a new one that moves the timeout into the future.	2231	a new one that moves the timeout into the future.
2103		2232
2104	=head3 Results	2233	=head3 Results
2105		2234
2106	name sockets create request	2235	name sockets create request
2107	EV 20000 69.01 11.16	2236	EV 20000 62.66 7.99
2108	Perl 20000 73.32 35.87	2237	Perl 20000 68.32 32.64
2109	IOAsync 20000 157.00 98.14 epoll	2238	IOAsync 20000 174.06 101.15 epoll
2110	IOAsync 20000 159.31 616.06 poll	2239	IOAsync 20000 174.67 610.84 poll
2111	Event 20000 212.62 257.32	2240	Event 20000 202.69 242.91
2112	Glib 20000 651.16 1896.30	2241	Glib 20000 557.01 1689.52
2113	POE 20000 349.67 12317.24 uses POE::Loop::Event	2242	POE 20000 341.54 12086.32 uses POE::Loop::Event
2114		2243
2115	=head3 Discussion	2244	=head3 Discussion
2116		2245
2117	This benchmark I<does> measure scalability and overall performance of the	2246	This benchmark I<does> measure scalability and overall performance of the
2118	particular event loop.	2247	particular event loop.
…		…
2244	As you can see, the AnyEvent + EV combination even beats the	2373	As you can see, the AnyEvent + EV combination even beats the
2245	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl	2374	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl
2246	backend easily beats IO::Lambda and POE.	2375	backend easily beats IO::Lambda and POE.
2247		2376
2248	And even the 100% non-blocking version written using the high-level (and	2377	And even the 100% non-blocking version written using the high-level (and
2249	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a	2378	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda
2250	large margin, even though it does all of DNS, tcp-connect and socket I/O	2379	higher level ("unoptimised") abstractions by a large margin, even though
2251	in a non-blocking way.	2380	it does all of DNS, tcp-connect and socket I/O in a non-blocking way.
2252		2381
2253	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and	2382	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and
2254	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are	2383	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are
2255	part of the IO::lambda distribution and were used without any changes.	2384	part of the IO::Lambda distribution and were used without any changes.
2256		2385
2257		2386
2258	=head1 SIGNALS	2387	=head1 SIGNALS
2259		2388
2260	AnyEvent currently installs handlers for these signals:	2389	AnyEvent currently installs handlers for these signals:
…		…
2349	lot less memory), but otherwise doesn't affect guard operation much. It is	2478	lot less memory), but otherwise doesn't affect guard operation much. It is
2350	purely used for performance.	2479	purely used for performance.
2351		2480
2352	=item L<JSON> and L<JSON::XS>	2481	=item L<JSON> and L<JSON::XS>
2353		2482
2354	This module is required when you want to read or write JSON data via	2483	One of these modules is required when you want to read or write JSON data
2355	L<AnyEvent::Handle>. It is also written in pure-perl, but can take	2484	via L<AnyEvent::Handle>. It is also written in pure-perl, but can take
2356	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.	2485	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.
2357		2486
2358	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is	2487	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is
2359	installed.	2488	installed.
2360		2489

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.259 by root, Tue Jul 28 02:07:18 2009 UTC vs. Revision 1.297 by root, Thu Nov 19 01:55:57 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.259 by root, Tue Jul 28 02:07:18 2009 UTC vs.
Revision 1.297 by root, Thu Nov 19 01:55:57 2009 UTC