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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.244 by root, Fri Jul 17 23:15:57 2009 UTC vs.
Revision 1.286 by root, Fri Aug 21 11:59:25 2009 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	AnyEvent - provide framework for multiple event loops	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
40	=head1 INTRODUCTION/TUTORIAL	40	=head1 INTRODUCTION/TUTORIAL
41		41
42	This manpage is mainly a reference manual. If you are interested	42	This manpage is mainly a reference manual. If you are interested
43	in a tutorial or some gentle introduction, have a look at the	43	in a tutorial or some gentle introduction, have a look at the
44	L<AnyEvent::Intro> manpage.	44	L<AnyEvent::Intro> manpage.
		45
		46	=head1 SUPPORT
		47
		48	There is a mailinglist for discussing all things AnyEvent, and an IRC
		49	channel, too.
		50
		51	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software
		52	Repository>, at L<http://anyevent.schmorp.de>, for more info.
45		53
46	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)	54	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)
47		55
48	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
49	nowadays. So what is different about AnyEvent?	57	nowadays. So what is different about AnyEvent?
…		…
173	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
174	declared.	182	declared.
175		183
176	=head2 I/O WATCHERS	184	=head2 I/O WATCHERS
177		185
		186	$w = AnyEvent->io (
		187	fh => <filehandle_or_fileno>,
		188	poll => <"r" or "w">,
		189	cb => <callback>,
		190	);
		191
178	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
179	with the following mandatory key-value pairs as arguments:	193	with the following mandatory key-value pairs as arguments:
180		194
181	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
182	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
…		…
211	undef $w;	225	undef $w;
212	});	226	});
213		227
214	=head2 TIME WATCHERS	228	=head2 TIME WATCHERS
215		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
216	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 >>
217	method with the following mandatory arguments:	239	method with the following mandatory arguments:
218		240
219	C<after> specifies after how many seconds (fractional values are	241	C<after> specifies after how many seconds (fractional values are
220	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
…		…
347		369
348	=back	370	=back
349		371
350	=head2 SIGNAL WATCHERS	372	=head2 SIGNAL WATCHERS
351		373
		374	$w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>);
		375
352	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
353	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
354	callback to be invoked whenever a signal occurs.	378	callback to be invoked whenever a signal occurs.
355		379
356	Although the callback might get passed parameters, their value and	380	Although the callback might get passed parameters, their value and
…		…
368		392
369	This watcher might use C<%SIG> (depending on the event loop used),	393	This watcher might use C<%SIG> (depending on the event loop used),
370	so programs overwriting those signals directly will likely not work	394	so programs overwriting those signals directly will likely not work
371	correctly.	395	correctly.
372		396
		397	Example: exit on SIGINT
		398
		399	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
		400
		401	=head3 Signal Races, Delays and Workarounds
		402
373	Also note that many event loops (e.g. Glib, Tk, Qt, IO::Async) do not	403	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching
374	support attaching callbacks to signals, which is a pity, as you cannot do	404	callbacks to signals in a generic way, which is a pity, as you cannot
375	race-free signal handling in perl. AnyEvent will try to do it's best, but	405	do race-free signal handling in perl, requiring C libraries for
		406	this. AnyEvent will try to do it's best, which means in some cases,
376	in some cases, signals will be delayed. The maximum time a signal might	407	signals will be delayed. The maximum time a signal might be delayed is
377	be delayed is specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10	408	specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This
378	seconds). This variable can be changed only before the first signal	409	variable can be changed only before the first signal watcher is created,
379	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
380	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
381	saving. All these problems can be avoided by installing the optional	415	All these problems can be avoided by installing the optional
382	L<Async::Interrupt> module.	416	L<Async::Interrupt> module, which works with most event loops. It will not
383		417	work with inherently broken event loops such as L<Event> or L<Event::Lib>
384	Example: exit on SIGINT	418	(and not with L<POE> currently, as POE does it's own workaround with
385		419	one-second latency). For those, you just have to suffer the delays.
386	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
387		420
388	=head2 CHILD PROCESS WATCHERS	421	=head2 CHILD PROCESS WATCHERS
389		422
		423	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
		424
390	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.
391		426
392	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,
393	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
394	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
395	any trace events (stopped/continued).	430	finished and an exit status is available, not on any trace events
		431	(stopped/continued).
396		432
397	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
398	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
399	callback arguments.	435	callback arguments.
400		436
…		…
441	# do something else, then wait for process exit	477	# do something else, then wait for process exit
442	$done->recv;	478	$done->recv;
443		479
444	=head2 IDLE WATCHERS	480	=head2 IDLE WATCHERS
445		481
		482	$w = AnyEvent->idle (cb => <callback>);
		483
446	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
447	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
448	"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
449	attention by the event loop".	487	attention by the event loop".
450		488
…		…
476	});	514	});
477	});	515	});
478		516
479	=head2 CONDITION VARIABLES	517	=head2 CONDITION VARIABLES
480		518
		519	$cv = AnyEvent->condvar;
		520
		521	$cv->send (<list>);
		522	my @res = $cv->recv;
		523
481	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
482	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
483	will actively watch for new events and call your callbacks.	526	will actively watch for new events and call your callbacks.
484		527
485	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
…		…
504	Condition variables are similar to callbacks, except that you can	547	Condition variables are similar to callbacks, except that you can
505	optionally wait for them. They can also be called merge points - points	548	optionally wait for them. They can also be called merge points - points
506	in time where multiple outstanding events have been processed. And yet	549	in time where multiple outstanding events have been processed. And yet
507	another way to call them is transactions - each condition variable can be	550	another way to call them is transactions - each condition variable can be
508	used to represent a transaction, which finishes at some point and delivers	551	used to represent a transaction, which finishes at some point and delivers
509	a result.	552	a result. And yet some people know them as "futures" - a promise to
		553	compute/deliver something that you can wait for.
510		554
511	Condition variables are very useful to signal that something has finished,	555	Condition variables are very useful to signal that something has finished,
512	for example, if you write a module that does asynchronous http requests,	556	for example, if you write a module that does asynchronous http requests,
513	then a condition variable would be the ideal candidate to signal the	557	then a condition variable would be the ideal candidate to signal the
514	availability of results. The user can either act when the callback is	558	availability of results. The user can either act when the callback is
…		…
548	after => 1,	592	after => 1,
549	cb => sub { $result_ready->send },	593	cb => sub { $result_ready->send },
550	);	594	);
551		595
552	# this "blocks" (while handling events) till the callback	596	# this "blocks" (while handling events) till the callback
553	# calls -<send	597	# calls ->send
554	$result_ready->recv;	598	$result_ready->recv;
555		599
556	Example: wait for a timer, but take advantage of the fact that condition	600	Example: wait for a timer, but take advantage of the fact that condition
557	variables are also callable directly.	601	variables are also callable directly.
558		602
…		…
622	one. For example, a function that pings many hosts in parallel might want	666	one. For example, a function that pings many hosts in parallel might want
623	to use a condition variable for the whole process.	667	to use a condition variable for the whole process.
624		668
625	Every call to C<< ->begin >> will increment a counter, and every call to	669	Every call to C<< ->begin >> will increment a counter, and every call to
626	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end	670	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end
627	>>, the (last) callback passed to C<begin> will be executed. That callback	671	>>, the (last) callback passed to C<begin> will be executed, passing the
628	is I<supposed> to call C<< ->send >>, but that is not required. If no	672	condvar as first argument. That callback is I<supposed> to call C<< ->send
629	callback was set, C<send> will be called without any arguments.	673	>>, but that is not required. If no group callback was set, C<send> will
		674	be called without any arguments.
630		675
631	You can think of C<< $cv->send >> giving you an OR condition (one call	676	You can think of C<< $cv->send >> giving you an OR condition (one call
632	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND	677	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND
633	condition (all C<begin> calls must be C<end>'ed before the condvar sends).	678	condition (all C<begin> calls must be C<end>'ed before the condvar sends).
634		679
…		…
661	begung can potentially be zero:	706	begung can potentially be zero:
662		707
663	my $cv = AnyEvent->condvar;	708	my $cv = AnyEvent->condvar;
664		709
665	my %result;	710	my %result;
666	$cv->begin (sub { $cv->send (\%result) });	711	$cv->begin (sub { shift->send (\%result) });
667		712
668	for my $host (@list_of_hosts) {	713	for my $host (@list_of_hosts) {
669	$cv->begin;	714	$cv->begin;
670	ping_host_then_call_callback $host, sub {	715	ping_host_then_call_callback $host, sub {
671	$result{$host} = ...;	716	$result{$host} = ...;
…		…
746	=item $cb = $cv->cb ($cb->($cv))	791	=item $cb = $cv->cb ($cb->($cv))
747		792
748	This is a mutator function that returns the callback set and optionally	793	This is a mutator function that returns the callback set and optionally
749	replaces it before doing so.	794	replaces it before doing so.
750		795
751	The callback will be called when the condition becomes "true", i.e. when	796	The callback will be called when the condition becomes (or already was)
752	C<send> or C<croak> are called, with the only argument being the condition	797	"true", i.e. when C<send> or C<croak> are called (or were called), with
753	variable itself. Calling C<recv> inside the callback or at any later time	798	the only argument being the condition variable itself. Calling C<recv>
754	is guaranteed not to block.	799	inside the callback or at any later time is guaranteed not to block.
755		800
756	=back	801	=back
757		802
758	=head1 SUPPORTED EVENT LOOPS/BACKENDS	803	=head1 SUPPORTED EVENT LOOPS/BACKENDS
759		804
…		…
762	=over 4	807	=over 4
763		808
764	=item Backends that are autoprobed when no other event loop can be found.	809	=item Backends that are autoprobed when no other event loop can be found.
765		810
766	EV is the preferred backend when no other event loop seems to be in	811	EV is the preferred backend when no other event loop seems to be in
767	use. If EV is not installed, then AnyEvent will try Event, and, failing	812	use. If EV is not installed, then AnyEvent will fall back to its own
768	that, will fall back to its own pure-perl implementation, which is	813	pure-perl implementation, which is available everywhere as it comes with
769	available everywhere as it comes with AnyEvent itself.	814	AnyEvent itself.
770		815
771	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	816	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
772	AnyEvent::Impl::Event based on Event, very stable, few glitches.
773	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	817	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.
774		818
775	=item Backends that are transparently being picked up when they are used.	819	=item Backends that are transparently being picked up when they are used.
776		820
777	These will be used when they are currently loaded when the first watcher	821	These will be used when they are currently loaded when the first watcher
778	is created, in which case it is assumed that the application is using	822	is created, in which case it is assumed that the application is using
779	them. This means that AnyEvent will automatically pick the right backend	823	them. This means that AnyEvent will automatically pick the right backend
780	when the main program loads an event module before anything starts to	824	when the main program loads an event module before anything starts to
781	create watchers. Nothing special needs to be done by the main program.	825	create watchers. Nothing special needs to be done by the main program.
782		826
		827	AnyEvent::Impl::Event based on Event, very stable, few glitches.
783	AnyEvent::Impl::Glib based on Glib, slow but very stable.	828	AnyEvent::Impl::Glib based on Glib, slow but very stable.
784	AnyEvent::Impl::Tk based on Tk, very broken.	829	AnyEvent::Impl::Tk based on Tk, very broken.
785	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	830	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
786	AnyEvent::Impl::POE based on POE, very slow, some limitations.	831	AnyEvent::Impl::POE based on POE, very slow, some limitations.
		832	AnyEvent::Impl::Irssi used when running within irssi.
787		833
788	=item Backends with special needs.	834	=item Backends with special needs.
789		835
790	Qt requires the Qt::Application to be instantiated first, but will	836	Qt requires the Qt::Application to be instantiated first, but will
791	otherwise be picked up automatically. As long as the main program	837	otherwise be picked up automatically. As long as the main program
…		…
865	event module detection too early, for example, L<AnyEvent::AIO> creates	911	event module detection too early, for example, L<AnyEvent::AIO> creates
866	and installs the global L<IO::AIO> watcher in a C<post_detect> block to	912	and installs the global L<IO::AIO> watcher in a C<post_detect> block to
867	avoid autodetecting the event module at load time.	913	avoid autodetecting the event module at load time.
868		914
869	If called in scalar or list context, then it creates and returns an object	915	If called in scalar or list context, then it creates and returns an object
870	that automatically removes the callback again when it is destroyed. See	916	that automatically removes the callback again when it is destroyed (or
		917	C<undef> when the hook was immediately executed). See L<AnyEvent::AIO> for
871	L<Coro::BDB> for a case where this is useful.	918	a case where this is useful.
		919
		920	Example: Create a watcher for the IO::AIO module and store it in
		921	C<$WATCHER>. Only do so after the event loop is initialised, though.
		922
		923	our WATCHER;
		924
		925	my $guard = AnyEvent::post_detect {
		926	$WATCHER = AnyEvent->io (fh => IO::AIO::poll_fileno, poll => 'r', cb => \&IO::AIO::poll_cb);
		927	};
		928
		929	# the \|\|= is important in case post_detect immediately runs the block,
		930	# as to not clobber the newly-created watcher. assigning both watcher and
		931	# post_detect guard to the same variable has the advantage of users being
		932	# able to just C<undef $WATCHER> if the watcher causes them grief.
		933
		934	$WATCHER \|\|= $guard;
872		935
873	=item @AnyEvent::post_detect	936	=item @AnyEvent::post_detect
874		937
875	If there are any code references in this array (you can C<push> to it	938	If there are any code references in this array (you can C<push> to it
876	before or after loading AnyEvent), then they will called directly after	939	before or after loading AnyEvent), then they will called directly after
…		…
1053		1116
1054	BEGIN { AnyEvent::common_sense }	1117	BEGIN { AnyEvent::common_sense }
1055		1118
1056	use Carp ();	1119	use Carp ();
1057		1120
1058	our $VERSION = 4.83;	1121	our $VERSION = '5.112';
1059	our $MODEL;	1122	our $MODEL;
1060		1123
1061	our $AUTOLOAD;	1124	our $AUTOLOAD;
1062	our @ISA;	1125	our @ISA;
1063		1126
…		…
1088	for reverse split /\s,\s/,	1151	for reverse split /\s,\s/,
1089	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1152	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1090	}	1153	}
1091		1154
1092	my @models = (	1155	my @models = (
1093	[EV:: => AnyEvent::Impl::EV::],	1156	[EV:: => AnyEvent::Impl::EV:: , 1],
1094	[Event:: => AnyEvent::Impl::Event::],
1095	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::],	1157	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],
1096	# everything below here will not be autoprobed	1158	# everything below here will not (normally) be autoprobed
1097	# as the pureperl backend should work everywhere	1159	# as the pureperl backend should work everywhere
1098	# and is usually faster	1160	# and is usually faster
		1161	[Event:: => AnyEvent::Impl::Event::, 1],
1099	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers	1162	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1100	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1163	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
		1164	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1101	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1165	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1102	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1166	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1103	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1167	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1104	[Wx:: => AnyEvent::Impl::POE::],	1168	[Wx:: => AnyEvent::Impl::POE::],
1105	[Prima:: => AnyEvent::Impl::POE::],	1169	[Prima:: => AnyEvent::Impl::POE::],
1106	# IO::Async is just too broken - we would need workarounds for its	1170	# IO::Async is just too broken - we would need workarounds for its
1107	# byzantine signal and broken child handling, among others.	1171	# byzantine signal and broken child handling, among others.
1108	# IO::Async is rather hard to detect, as it doesn't have any	1172	# IO::Async is rather hard to detect, as it doesn't have any
1109	# obvious default class.	1173	# obvious default class.
1110	# [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program	1174	[IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1111	# [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program	1175	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1112	# [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program	1176	[IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
		1177	[AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
1113	);	1178	);
1114		1179
1115	our %method = map +($_ => 1),	1180	our %method = map +($_ => 1),
1116	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1181	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1117		1182
…		…
1121	my ($cb) = @_;	1186	my ($cb) = @_;
1122		1187
1123	if ($MODEL) {	1188	if ($MODEL) {
1124	$cb->();	1189	$cb->();
1125		1190
1126	1	1191	undef
1127	} else {	1192	} else {
1128	push @post_detect, $cb;	1193	push @post_detect, $cb;
1129		1194
1130	defined wantarray	1195	defined wantarray
1131	? bless \$cb, "AnyEvent::Util::postdetect"	1196	? bless \$cb, "AnyEvent::Util::postdetect"
…		…
1163	}	1228	}
1164	}	1229	}
1165	}	1230	}
1166		1231
1167	unless ($MODEL) {	1232	unless ($MODEL) {
1168	# try to load a model	1233	# try to autoload a model
1169
1170	for (@REGISTRY, @models) {	1234	for (@REGISTRY, @models) {
1171	my ($package, $model) = @$_;	1235	my ($package, $model, $autoload) = @$_;
		1236	if (
		1237	$autoload
1172	if (eval "require $package"	1238	and eval "require $package"
1173	and ${"$package\::VERSION"} > 0	1239	and ${"$package\::VERSION"} > 0
1174	and eval "require $model") {	1240	and eval "require $model"
		1241	) {
1175	$MODEL = $model;	1242	$MODEL = $model;
1176	warn "AnyEvent: autoprobed model '$model', using it.\n" if $VERBOSE >= 2;	1243	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1177	last;	1244	last;
1178	}	1245	}
1179	}	1246	}
1180		1247
1181	$MODEL	1248	$MODEL
…		…
1220	or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,";	1287	or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,";
1221		1288
1222	# we assume CLOEXEC is already set by perl in all important cases	1289	# we assume CLOEXEC is already set by perl in all important cases
1223		1290
1224	($fh2, $rw)	1291	($fh2, $rw)
		1292	}
		1293
		1294	=head1 SIMPLIFIED AE API
		1295
		1296	Starting with version 5.0, AnyEvent officially supports a second, much
		1297	simpler, API that is designed to reduce the calling, typing and memory
		1298	overhead.
		1299
		1300	See the L<AE> manpage for details.
		1301
		1302	=cut
		1303
		1304	package AE;
		1305
		1306	our $VERSION = $AnyEvent::VERSION;
		1307
		1308	sub io($$$) {
		1309	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1310	}
		1311
		1312	sub timer($$$) {
		1313	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
		1314	}
		1315
		1316	sub signal($$) {
		1317	AnyEvent->signal (signal => $_[0], cb => $_[1])
		1318	}
		1319
		1320	sub child($$) {
		1321	AnyEvent->child (pid => $_[0], cb => $_[1])
		1322	}
		1323
		1324	sub idle($) {
		1325	AnyEvent->idle (cb => $_[0])
		1326	}
		1327
		1328	sub cv(;&) {
		1329	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
		1330	}
		1331
		1332	sub now() {
		1333	AnyEvent->now
		1334	}
		1335
		1336	sub now_update() {
		1337	AnyEvent->now_update
		1338	}
		1339
		1340	sub time() {
		1341	AnyEvent->time
1225	}	1342	}
1226		1343
1227	package AnyEvent::Base;	1344	package AnyEvent::Base;
1228		1345
1229	# default implementations for many methods	1346	# default implementations for many methods
…		…
1253	}	1370	}
1254		1371
1255	# default implementation for ->signal	1372	# default implementation for ->signal
1256		1373
1257	our $HAVE_ASYNC_INTERRUPT;	1374	our $HAVE_ASYNC_INTERRUPT;
		1375
		1376	sub _have_async_interrupt() {
		1377	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
		1378	&& eval "use Async::Interrupt 1.0 (); 1")
		1379	unless defined $HAVE_ASYNC_INTERRUPT;
		1380
		1381	$HAVE_ASYNC_INTERRUPT
		1382	}
		1383
1258	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1384	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1259	our (%SIG_ASY, %SIG_ASY_W);	1385	our (%SIG_ASY, %SIG_ASY_W);
1260	our ($SIG_COUNT, $SIG_TW);	1386	our ($SIG_COUNT, $SIG_TW);
1261		1387
1262	sub _signal_exec {	1388	sub _signal_exec {
…		…
1270	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1396	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1271	}	1397	}
1272	}	1398	}
1273	}	1399	}
1274		1400
		1401	# install a dummy wakeup watcher to reduce signal catching latency
1275	sub _signal {	1402	sub _sig_add() {
1276	my (undef, %arg) = @_;	1403	unless ($SIG_COUNT++) {
		1404	# try to align timer on a full-second boundary, if possible
		1405	my $NOW = AE::now;
1277		1406
1278	my $signal = uc $arg{signal}	1407	$SIG_TW = AE::timer
1279	or Carp::croak "required option 'signal' is missing";	1408	$MAX_SIGNAL_LATENCY - ($NOW - int $NOW),
1280		1409	$MAX_SIGNAL_LATENCY,
1281	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1410	sub { } # just for the PERL_ASYNC_CHECK
1282
1283	if ($HAVE_ASYNC_INTERRUPT) {
1284	# async::interrupt
1285
1286	$SIG_ASY{$signal} \|\|= do {
1287	my $asy = new Async::Interrupt
1288	cb => sub { undef $SIG_EV{$signal} },
1289	signal => $signal,
1290	pipe => [$SIGPIPE_R->filenos],
1291	;
1292	$asy->pipe_autodrain (0);
1293
1294	$asy
1295	};	1411	;
1296
1297	} else {
1298	# pure perl
1299
1300	$SIG{$signal} \|\|= sub {
1301	local $!;
1302	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
1303	undef $SIG_EV{$signal};
1304	};
1305
1306	# can't do signal processing without introducing races in pure perl,
1307	# so limit the signal latency.
1308	++$SIG_COUNT;
1309	$SIG_TW \|\|= AnyEvent->timer (
1310	after => $MAX_SIGNAL_LATENCY,
1311	interval => $MAX_SIGNAL_LATENCY,
1312	cb => sub { }, # just for the PERL_ASYNC_CHECK
1313	);
1314	}	1412	}
1315
1316	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1317	}	1413	}
1318		1414
1319	sub signal {	1415	sub _sig_del {
1320	# probe for availability of Async::Interrupt
1321	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") {
1322	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1323
1324	$HAVE_ASYNC_INTERRUPT = 1;
1325	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1326	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
1327
1328	} else {
1329	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1330
1331	require Fcntl;
1332
1333	if (AnyEvent::WIN32) {
1334	require AnyEvent::Util;
1335
1336	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1337	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1338	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1339	} else {
1340	pipe $SIGPIPE_R, $SIGPIPE_W;
1341	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1342	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1343
1344	# not strictly required, as $^F is normally 2, but let's make sure...
1345	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1346	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1347	}
1348
1349	$SIGPIPE_R
1350	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1351
1352	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1353	}
1354
1355	*signal = \&_signal;
1356	&signal
1357	}
1358
1359	sub AnyEvent::Base::signal::DESTROY {
1360	my ($signal, $cb) = @{$_[0]};
1361
1362	undef $SIG_TW	1416	undef $SIG_TW
1363	unless --$SIG_COUNT;	1417	unless --$SIG_COUNT;
		1418	}
1364		1419
		1420	our $_sig_name_init; $_sig_name_init = sub {
		1421	eval q{ # poor man's autoloading
		1422	undef $_sig_name_init;
		1423
		1424	if (_have_async_interrupt) {
		1425	*sig2num = \&Async::Interrupt::sig2num;
		1426	*sig2name = \&Async::Interrupt::sig2name;
		1427	} else {
		1428	require Config;
		1429
		1430	my %signame2num;
		1431	@signame2num{ split ' ', $Config::Config{sig_name} }
		1432	= split ' ', $Config::Config{sig_num};
		1433
		1434	my @signum2name;
		1435	@signum2name[values %signame2num] = keys %signame2num;
		1436
		1437	*sig2num = sub($) {
		1438	$_[0] > 0 ? shift : $signame2num{+shift}
		1439	};
		1440	*sig2name = sub ($) {
		1441	$_[0] > 0 ? $signum2name[+shift] : shift
		1442	};
		1443	}
		1444	};
		1445	die if $@;
		1446	};
		1447
		1448	sub sig2num ($) { &$_sig_name_init; &sig2num }
		1449	sub sig2name($) { &$_sig_name_init; &sig2name }
		1450
		1451	sub signal {
		1452	eval q{ # poor man's autoloading {}
		1453	# probe for availability of Async::Interrupt
		1454	if (_have_async_interrupt) {
		1455	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1456
		1457	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1458	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
		1459
		1460	} else {
		1461	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1462
		1463	require Fcntl;
		1464
		1465	if (AnyEvent::WIN32) {
		1466	require AnyEvent::Util;
		1467
		1468	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1469	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1470	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1471	} else {
		1472	pipe $SIGPIPE_R, $SIGPIPE_W;
		1473	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1474	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1475
		1476	# not strictly required, as $^F is normally 2, but let's make sure...
		1477	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1478	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1479	}
		1480
		1481	$SIGPIPE_R
		1482	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1483
		1484	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;
		1485	}
		1486
		1487	*signal = sub {
		1488	my (undef, %arg) = @_;
		1489
		1490	my $signal = uc $arg{signal}
		1491	or Carp::croak "required option 'signal' is missing";
		1492
		1493	if ($HAVE_ASYNC_INTERRUPT) {
		1494	# async::interrupt
		1495
		1496	$signal = sig2num $signal;
		1497	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1498
		1499	$SIG_ASY{$signal} \|\|= new Async::Interrupt
		1500	cb => sub { undef $SIG_EV{$signal} },
		1501	signal => $signal,
		1502	pipe => [$SIGPIPE_R->filenos],
		1503	pipe_autodrain => 0,
		1504	;
		1505
		1506	} else {
		1507	# pure perl
		1508
		1509	# AE::Util has been loaded in signal
		1510	$signal = sig2name $signal;
		1511	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1512
		1513	$SIG{$signal} \|\|= sub {
		1514	local $!;
		1515	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
		1516	undef $SIG_EV{$signal};
		1517	};
		1518
		1519	# can't do signal processing without introducing races in pure perl,
		1520	# so limit the signal latency.
		1521	_sig_add;
		1522	}
		1523
		1524	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
		1525	};
		1526
		1527	*AnyEvent::Base::signal::DESTROY = sub {
		1528	my ($signal, $cb) = @{$_[0]};
		1529
		1530	_sig_del;
		1531
1365	delete $SIG_CB{$signal}{$cb};	1532	delete $SIG_CB{$signal}{$cb};
1366		1533
		1534	$HAVE_ASYNC_INTERRUPT
		1535	? delete $SIG_ASY{$signal}
1367	# delete doesn't work with older perls - they then	1536	: # delete doesn't work with older perls - they then
1368	# print weird messages, or just unconditionally exit	1537	# print weird messages, or just unconditionally exit
1369	# instead of getting the default action.	1538	# instead of getting the default action.
1370	undef $SIG{$signal}	1539	undef $SIG{$signal}
1371	unless keys %{ $SIG_CB{$signal} };	1540	unless keys %{ $SIG_CB{$signal} };
		1541	};
		1542	};
		1543	die if $@;
		1544	&signal
1372	}	1545	}
1373		1546
1374	# default implementation for ->child	1547	# default implementation for ->child
1375		1548
1376	our %PID_CB;	1549	our %PID_CB;
1377	our $CHLD_W;	1550	our $CHLD_W;
1378	our $CHLD_DELAY_W;	1551	our $CHLD_DELAY_W;
1379	our $WNOHANG;	1552	our $WNOHANG;
1380		1553
		1554	sub _emit_childstatus($$) {
		1555	my (undef, $rpid, $rstatus) = @_;
		1556
		1557	$_->($rpid, $rstatus)
		1558	for values %{ $PID_CB{$rpid} \|\| {} },
		1559	values %{ $PID_CB{0} \|\| {} };
		1560	}
		1561
1381	sub _sigchld {	1562	sub _sigchld {
		1563	my $pid;
		1564
		1565	AnyEvent->_emit_childstatus ($pid, $?)
1382	while (0 < (my $pid = waitpid -1, $WNOHANG)) {	1566	while ($pid = waitpid -1, $WNOHANG) > 0;
1383	$_->($pid, $?)
1384	for values %{ $PID_CB{$pid} \|\| {} },
1385	values %{ $PID_CB{0} \|\| {} };
1386	}
1387	}	1567	}
1388		1568
1389	sub child {	1569	sub child {
1390	my (undef, %arg) = @_;	1570	my (undef, %arg) = @_;
1391		1571
…		…
1398	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1578	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1399	? 1	1579	? 1
1400	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1580	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1401		1581
1402	unless ($CHLD_W) {	1582	unless ($CHLD_W) {
1403	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);	1583	$CHLD_W = AE::signal CHLD => \&_sigchld;
1404	# child could be a zombie already, so make at least one round	1584	# child could be a zombie already, so make at least one round
1405	&_sigchld;	1585	&_sigchld;
1406	}	1586	}
1407		1587
1408	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1588	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
…		…
1434	# never use more then 50% of the time for the idle watcher,	1614	# never use more then 50% of the time for the idle watcher,
1435	# within some limits	1615	# within some limits
1436	$w = 0.0001 if $w < 0.0001;	1616	$w = 0.0001 if $w < 0.0001;
1437	$w = 5 if $w > 5;	1617	$w = 5 if $w > 5;
1438		1618
1439	$w = AnyEvent->timer (after => $w, cb => $rcb);	1619	$w = AE::timer $w, 0, $rcb;
1440	} else {	1620	} else {
1441	# clean up...	1621	# clean up...
1442	undef $w;	1622	undef $w;
1443	undef $rcb;	1623	undef $rcb;
1444	}	1624	}
1445	};	1625	};
1446		1626
1447	$w = AnyEvent->timer (after => 0.05, cb => $rcb);	1627	$w = AE::timer 0.05, 0, $rcb;
1448		1628
1449	bless \\$cb, "AnyEvent::Base::idle"	1629	bless \\$cb, "AnyEvent::Base::idle"
1450	}	1630	}
1451		1631
1452	sub AnyEvent::Base::idle::DESTROY {	1632	sub AnyEvent::Base::idle::DESTROY {
…		…
1506	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1686	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};
1507	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1687	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]
1508	}	1688	}
1509		1689
1510	sub cb {	1690	sub cb {
1511	$_[0]{_ae_cb} = $_[1] if @_ > 1;	1691	my $cv = shift;
		1692
		1693	@_
		1694	and $cv->{_ae_cb} = shift
		1695	and $cv->{_ae_sent}
		1696	and (delete $cv->{_ae_cb})->($cv);
		1697
1512	$_[0]{_ae_cb}	1698	$cv->{_ae_cb}
1513	}	1699	}
1514		1700
1515	sub begin {	1701	sub begin {
1516	++$_[0]{_ae_counter};	1702	++$_[0]{_ae_counter};
1517	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;	1703	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;
…		…
1876	through AnyEvent. The benchmark creates a lot of timers (with a zero	2062	through AnyEvent. The benchmark creates a lot of timers (with a zero
1877	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,	2063	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,
1878	which it is), lets them fire exactly once and destroys them again.	2064	which it is), lets them fire exactly once and destroys them again.
1879		2065
1880	Source code for this benchmark is found as F<eg/bench> in the AnyEvent	2066	Source code for this benchmark is found as F<eg/bench> in the AnyEvent
1881	distribution.	2067	distribution. It uses the L<AE> interface, which makes a real difference
		2068	for the EV and Perl backends only.
1882		2069
1883	=head3 Explanation of the columns	2070	=head3 Explanation of the columns
1884		2071
1885	I<watcher> is the number of event watchers created/destroyed. Since	2072	I<watcher> is the number of event watchers created/destroyed. Since
1886	different event models feature vastly different performances, each event	2073	different event models feature vastly different performances, each event
…		…
1907	watcher.	2094	watcher.
1908		2095
1909	=head3 Results	2096	=head3 Results
1910		2097
1911	name watchers bytes create invoke destroy comment	2098	name watchers bytes create invoke destroy comment
1912	EV/EV 400000 224 0.47 0.35 0.27 EV native interface	2099	EV/EV 100000 223 0.47 0.43 0.27 EV native interface
1913	EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers	2100	EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers
1914	CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal	2101	Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal
1915	Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation	2102	Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation
1916	Event/Event 16000 517 32.20 31.80 0.81 Event native interface	2103	Event/Event 16000 516 31.16 31.84 0.82 Event native interface
1917	Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers	2104	Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers
1918	IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll	2105	IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll
1919	IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll	2106	IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll
1920	Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour	2107	Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour
1921	Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers	2108	Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers
1922	POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event	2109	POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event
1923	POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select	2110	POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select
1924		2111
1925	=head3 Discussion	2112	=head3 Discussion
1926		2113
1927	The benchmark does I<not> measure scalability of the event loop very	2114	The benchmark does I<not> measure scalability of the event loop very
1928	well. For example, a select-based event loop (such as the pure perl one)	2115	well. For example, a select-based event loop (such as the pure perl one)
…		…
1940	benchmark machine, handling an event takes roughly 1600 CPU cycles with	2127	benchmark machine, handling an event takes roughly 1600 CPU cycles with
1941	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU	2128	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU
1942	cycles with POE.	2129	cycles with POE.
1943		2130
1944	C<EV> is the sole leader regarding speed and memory use, which are both	2131	C<EV> is the sole leader regarding speed and memory use, which are both
1945	maximal/minimal, respectively. Even when going through AnyEvent, it uses	2132	maximal/minimal, respectively. When using the L<AE> API there is zero
		2133	overhead (when going through the AnyEvent API create is about 5-6 times
		2134	slower, with other times being equal, so still uses far less memory than
1946	far less memory than any other event loop and is still faster than Event	2135	any other event loop and is still faster than Event natively).
1947	natively.
1948		2136
1949	The pure perl implementation is hit in a few sweet spots (both the	2137	The pure perl implementation is hit in a few sweet spots (both the
1950	constant timeout and the use of a single fd hit optimisations in the perl	2138	constant timeout and the use of a single fd hit optimisations in the perl
1951	interpreter and the backend itself). Nevertheless this shows that it	2139	interpreter and the backend itself). Nevertheless this shows that it
1952	adds very little overhead in itself. Like any select-based backend its	2140	adds very little overhead in itself. Like any select-based backend its
…		…
2026	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100	2214	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100
2027	(1%) are active. This mirrors the activity of large servers with many	2215	(1%) are active. This mirrors the activity of large servers with many
2028	connections, most of which are idle at any one point in time.	2216	connections, most of which are idle at any one point in time.
2029		2217
2030	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent	2218	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent
2031	distribution.	2219	distribution. It uses the L<AE> interface, which makes a real difference
		2220	for the EV and Perl backends only.
2032		2221
2033	=head3 Explanation of the columns	2222	=head3 Explanation of the columns
2034		2223
2035	I<sockets> is the number of sockets, and twice the number of "servers" (as	2224	I<sockets> is the number of sockets, and twice the number of "servers" (as
2036	each server has a read and write socket end).	2225	each server has a read and write socket end).
…		…
2044	a new one that moves the timeout into the future.	2233	a new one that moves the timeout into the future.
2045		2234
2046	=head3 Results	2235	=head3 Results
2047		2236
2048	name sockets create request	2237	name sockets create request
2049	EV 20000 69.01 11.16	2238	EV 20000 62.66 7.99
2050	Perl 20000 73.32 35.87	2239	Perl 20000 68.32 32.64
2051	IOAsync 20000 157.00 98.14 epoll	2240	IOAsync 20000 174.06 101.15 epoll
2052	IOAsync 20000 159.31 616.06 poll	2241	IOAsync 20000 174.67 610.84 poll
2053	Event 20000 212.62 257.32	2242	Event 20000 202.69 242.91
2054	Glib 20000 651.16 1896.30	2243	Glib 20000 557.01 1689.52
2055	POE 20000 349.67 12317.24 uses POE::Loop::Event	2244	POE 20000 341.54 12086.32 uses POE::Loop::Event
2056		2245
2057	=head3 Discussion	2246	=head3 Discussion
2058		2247
2059	This benchmark I<does> measure scalability and overall performance of the	2248	This benchmark I<does> measure scalability and overall performance of the
2060	particular event loop.	2249	particular event loop.
…		…
2255		2444
2256	This slightly arcane module is used to implement fast signal handling: To	2445	This slightly arcane module is used to implement fast signal handling: To
2257	my knowledge, there is no way to do completely race-free and quick	2446	my knowledge, there is no way to do completely race-free and quick
2258	signal handling in pure perl. To ensure that signals still get	2447	signal handling in pure perl. To ensure that signals still get
2259	delivered, AnyEvent will start an interval timer to wake up perl (and	2448	delivered, AnyEvent will start an interval timer to wake up perl (and
2260	catch the signals) with soemd elay (default is 10 seconds, look for	2449	catch the signals) with some delay (default is 10 seconds, look for
2261	C<$AnyEvent::MAX_SIGNAL_LATENCY>).	2450	C<$AnyEvent::MAX_SIGNAL_LATENCY>).
2262		2451
2263	If this module is available, then it will be used to implement signal	2452	If this module is available, then it will be used to implement signal
2264	catching, which means that signals will not be delayed, and the event loop	2453	catching, which means that signals will not be delayed, and the event loop
2265	will not be interrupted regularly, which is more efficient (And good for	2454	will not be interrupted regularly, which is more efficient (And good for
2266	battery life on laptops).	2455	battery life on laptops).
2267		2456
2268	This affects not just the pure-perl event loop, but also other event loops	2457	This affects not just the pure-perl event loop, but also other event loops
2269	that have no signal handling on their own (e.g. Glib, Tk, Qt).	2458	that have no signal handling on their own (e.g. Glib, Tk, Qt).
		2459
		2460	Some event loops (POE, Event, Event::Lib) offer signal watchers natively,
		2461	and either employ their own workarounds (POE) or use AnyEvent's workaround
		2462	(using C<$AnyEvent::MAX_SIGNAL_LATENCY>). Installing L<Async::Interrupt>
		2463	does nothing for those backends.
2270		2464
2271	=item L<EV>	2465	=item L<EV>
2272		2466
2273	This module isn't really "optional", as it is simply one of the backend	2467	This module isn't really "optional", as it is simply one of the backend
2274	event loops that AnyEvent can use. However, it is simply the best event	2468	event loops that AnyEvent can use. However, it is simply the best event
…		…
2288		2482
2289	=item L<JSON> and L<JSON::XS>	2483	=item L<JSON> and L<JSON::XS>
2290		2484
2291	This module is required when you want to read or write JSON data via	2485	This module is required when you want to read or write JSON data via
2292	L<AnyEvent::Handle>. It is also written in pure-perl, but can take	2486	L<AnyEvent::Handle>. It is also written in pure-perl, but can take
2293	advantage of the ulta-high-speed L<JSON::XS> module when it is installed.	2487	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.
2294		2488
2295	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is	2489	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is
2296	installed.	2490	installed.
2297		2491
2298	=item L<Net::SSLeay>	2492	=item L<Net::SSLeay>
…		…
2365	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2559	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2366		2560
2367	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2561	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2368	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	2562	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2369	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2563	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2370	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>.	2564	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.
2371		2565
2372	Non-blocking file handles, sockets, TCP clients and	2566	Non-blocking file handles, sockets, TCP clients and
2373	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2567	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2374		2568
2375	Asynchronous DNS: L<AnyEvent::DNS>.	2569	Asynchronous DNS: L<AnyEvent::DNS>.

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.244 by root, Fri Jul 17 23:15:57 2009 UTC vs. Revision 1.286 by root, Fri Aug 21 11:59:25 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.244 by root, Fri Jul 17 23:15:57 2009 UTC vs.
Revision 1.286 by root, Fri Aug 21 11:59:25 2009 UTC