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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.333 by root, Tue Oct 12 06:47:54 2010 UTC vs.
Revision 1.397 by root, Thu Mar 22 18:00:35 2012 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	AnyEvent - the DBI of event loop programming	3	AnyEvent - the DBI of event loop programming
4		4
5	EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt	5	EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt,
6	and POE are various supported event loops/environments.	6	FLTK 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
46	in a tutorial or some gentle introduction, have a look at the	46	in a tutorial or some gentle introduction, have a look at the
47	L<AnyEvent::Intro> manpage.	47	L<AnyEvent::Intro> manpage.
48		48
49	=head1 SUPPORT	49	=head1 SUPPORT
50		50
		51	An FAQ document is available as L<AnyEvent::FAQ>.
		52
51	There is a mailinglist for discussing all things AnyEvent, and an IRC	53	There also is a mailinglist for discussing all things AnyEvent, and an IRC
52	channel, too.	54	channel, too.
53		55
54	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software	56	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software
55	Repository>, at L<http://anyevent.schmorp.de>, for more info.	57	Repository>, at L<http://anyevent.schmorp.de>, for more info.
56		58
…		…
83	that isn't them. What's worse, all the potential users of your	85	that isn't them. What's worse, all the potential users of your
84	module are I<also> forced to use the same event loop you use.	86	module are I<also> forced to use the same event loop you use.
85		87
86	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works	88	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works
87	fine. AnyEvent + Tk works fine etc. etc. but none of these work together	89	fine. AnyEvent + Tk works fine etc. etc. but none of these work together
88	with the rest: POE + IO::Async? No go. Tk + Event? No go. Again: if	90	with the rest: POE + EV? No go. Tk + Event? No go. Again: if your module
89	your module uses one of those, every user of your module has to use it,	91	uses one of those, every user of your module has to use it, too. But if
90	too. But if your module uses AnyEvent, it works transparently with all	92	your module uses AnyEvent, it works transparently with all event models it
91	event models it supports (including stuff like IO::Async, as long as those	93	supports (including stuff like IO::Async, as long as those use one of the
92	use one of the supported event loops. It is easy to add new event loops	94	supported event loops. It is easy to add new event loops to AnyEvent, too,
93	to AnyEvent, too, so it is future-proof).	95	so it is future-proof).
94		96
95	In addition to being free of having to use I<the one and only true event	97	In addition to being free of having to use I<the one and only true event
96	model>, AnyEvent also is free of bloat and policy: with POE or similar	98	model>, AnyEvent also is free of bloat and policy: with POE or similar
97	modules, you get an enormous amount of code and strict rules you have to	99	modules, you get an enormous amount of code and strict rules you have to
98	follow. AnyEvent, on the other hand, is lean and to the point, by only	100	follow. AnyEvent, on the other hand, is lean and to the point, by only
…		…
119	The interface itself is vaguely similar, but not identical to the L<Event>	121	The interface itself is vaguely similar, but not identical to the L<Event>
120	module.	122	module.
121		123
122	During the first call of any watcher-creation method, the module tries	124	During the first call of any watcher-creation method, the module tries
123	to detect the currently loaded event loop by probing whether one of the	125	to detect the currently loaded event loop by probing whether one of the
124	following modules is already loaded: L<EV>, L<AnyEvent::Impl::Perl>,	126	following modules is already loaded: L<EV>, L<AnyEvent::Loop>,
125	L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one	127	L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one
126	found is used. If none are detected, the module tries to load the first	128	found is used. If none are detected, the module tries to load the first
127	four modules in the order given; but note that if L<EV> is not	129	four modules in the order given; but note that if L<EV> is not
128	available, the pure-perl L<AnyEvent::Impl::Perl> should always work, so	130	available, the pure-perl L<AnyEvent::Loop> should always work, so
129	the other two are not normally tried.	131	the other two are not normally tried.
130		132
131	Because AnyEvent first checks for modules that are already loaded, loading	133	Because AnyEvent first checks for modules that are already loaded, loading
132	an event model explicitly before first using AnyEvent will likely make	134	an event model explicitly before first using AnyEvent will likely make
133	that model the default. For example:	135	that model the default. For example:
…		…
140	The I<likely> means that, if any module loads another event model and	142	The I<likely> means that, if any module loads another event model and
141	starts using it, all bets are off - this case should be very rare though,	143	starts using it, all bets are off - this case should be very rare though,
142	as very few modules hardcode event loops without announcing this very	144	as very few modules hardcode event loops without announcing this very
143	loudly.	145	loudly.
144		146
145	The pure-perl implementation of AnyEvent is called	147	The pure-perl implementation of AnyEvent is called C<AnyEvent::Loop>. Like
146	C<AnyEvent::Impl::Perl>. Like other event modules you can load it	148	other event modules you can load it explicitly and enjoy the high
147	explicitly and enjoy the high availability of that event loop :)	149	availability of that event loop :)
148		150
149	=head1 WATCHERS	151	=head1 WATCHERS
150		152
151	AnyEvent has the central concept of a I<watcher>, which is an object that	153	AnyEvent has the central concept of a I<watcher>, which is an object that
152	stores relevant data for each kind of event you are waiting for, such as	154	stores relevant data for each kind of event you are waiting for, such as
…		…
354	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into	356	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into
355	account.	357	account.
356		358
357	=item AnyEvent->now_update	359	=item AnyEvent->now_update
358		360
359	Some event loops (such as L<EV> or L<AnyEvent::Impl::Perl>) cache	361	Some event loops (such as L<EV> or L<AnyEvent::Loop>) cache the current
360	the current time for each loop iteration (see the discussion of L<<	362	time for each loop iteration (see the discussion of L<< AnyEvent->now >>,
361	AnyEvent->now >>, above).	363	above).
362		364
363	When a callback runs for a long time (or when the process sleeps), then	365	When a callback runs for a long time (or when the process sleeps), then
364	this "current" time will differ substantially from the real time, which	366	this "current" time will differ substantially from the real time, which
365	might affect timers and time-outs.	367	might affect timers and time-outs.
366		368
…		…
413	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's	415	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's
414	pure perl implementation).	416	pure perl implementation).
415		417
416	=head3 Safe/Unsafe Signals	418	=head3 Safe/Unsafe Signals
417		419
418	Perl signals can be either "safe" (synchronous to opcode handling) or	420	Perl signals can be either "safe" (synchronous to opcode handling)
419	"unsafe" (asynchronous) - the former might get delayed indefinitely, the	421	or "unsafe" (asynchronous) - the former might delay signal delivery
420	latter might corrupt your memory.	422	indefinitely, the latter might corrupt your memory.
421		423
422	AnyEvent signal handlers are, in addition, synchronous to the event loop,	424	AnyEvent signal handlers are, in addition, synchronous to the event loop,
423	i.e. they will not interrupt your running perl program but will only be	425	i.e. they will not interrupt your running perl program but will only be
424	called as part of the normal event handling (just like timer, I/O etc.	426	called as part of the normal event handling (just like timer, I/O etc.
425	callbacks, too).	427	callbacks, too).
426		428
427	=head3 Signal Races, Delays and Workarounds	429	=head3 Signal Races, Delays and Workarounds
428		430
429	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching	431	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support
430	callbacks to signals in a generic way, which is a pity, as you cannot	432	attaching callbacks to signals in a generic way, which is a pity,
431	do race-free signal handling in perl, requiring C libraries for	433	as you cannot do race-free signal handling in perl, requiring
432	this. AnyEvent will try to do its best, which means in some cases,	434	C libraries for this. AnyEvent will try to do its best, which
433	signals will be delayed. The maximum time a signal might be delayed is	435	means in some cases, signals will be delayed. The maximum time
434	specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This	436	a signal might be delayed is 10 seconds by default, but can
435	variable can be changed only before the first signal watcher is created,	437	be overriden via C<$ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY}> or
436	and should be left alone otherwise. This variable determines how often	438	C<$AnyEvent::MAX_SIGNAL_LATENCY> - see the L<ENVIRONMENT VARIABLES>
437	AnyEvent polls for signals (in case a wake-up was missed). Higher values	439	section for details.
438	will cause fewer spurious wake-ups, which is better for power and CPU
439	saving.
440		440
441	All these problems can be avoided by installing the optional	441	All these problems can be avoided by installing the optional
442	L<Async::Interrupt> module, which works with most event loops. It will not	442	L<Async::Interrupt> module, which works with most event loops. It will not
443	work with inherently broken event loops such as L<Event> or L<Event::Lib>	443	work with inherently broken event loops such as L<Event> or L<Event::Lib>
444	(and not with L<POE> currently, as POE does its own workaround with	444	(and not with L<POE> currently). For those, you just have to suffer the
445	one-second latency). For those, you just have to suffer the delays.	445	delays.
446		446
447	=head2 CHILD PROCESS WATCHERS	447	=head2 CHILD PROCESS WATCHERS
448		448
449	$w = AnyEvent->child (pid => <process id>, cb => <callback>);	449	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
450		450
…		…
480	thing in an AnyEvent program, you I<have> to create at least one	480	thing in an AnyEvent program, you I<have> to create at least one
481	watcher before you C<fork> the child (alternatively, you can call	481	watcher before you C<fork> the child (alternatively, you can call
482	C<AnyEvent::detect>).	482	C<AnyEvent::detect>).
483		483
484	As most event loops do not support waiting for child events, they will be	484	As most event loops do not support waiting for child events, they will be
485	emulated by AnyEvent in most cases, in which the latency and race problems	485	emulated by AnyEvent in most cases, in which case the latency and race
486	mentioned in the description of signal watchers apply.	486	problems mentioned in the description of signal watchers apply.
487		487
488	Example: fork a process and wait for it	488	Example: fork a process and wait for it
489		489
490	my $done = AnyEvent->condvar;	490	my $done = AnyEvent->condvar;
491		491
…		…
858	use. If EV is not installed, then AnyEvent will fall back to its own	858	use. If EV is not installed, then AnyEvent will fall back to its own
859	pure-perl implementation, which is available everywhere as it comes with	859	pure-perl implementation, which is available everywhere as it comes with
860	AnyEvent itself.	860	AnyEvent itself.
861		861
862	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	862	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
863	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	863	AnyEvent::Impl::Perl pure-perl AnyEvent::Loop, fast and portable.
864		864
865	=item Backends that are transparently being picked up when they are used.	865	=item Backends that are transparently being picked up when they are used.
866		866
867	These will be used if they are already loaded when the first watcher	867	These will be used if they are already loaded when the first watcher
868	is created, in which case it is assumed that the application is using	868	is created, in which case it is assumed that the application is using
…		…
874	AnyEvent::Impl::Glib based on Glib, slow but very stable.	874	AnyEvent::Impl::Glib based on Glib, slow but very stable.
875	AnyEvent::Impl::Tk based on Tk, very broken.	875	AnyEvent::Impl::Tk based on Tk, very broken.
876	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	876	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
877	AnyEvent::Impl::POE based on POE, very slow, some limitations.	877	AnyEvent::Impl::POE based on POE, very slow, some limitations.
878	AnyEvent::Impl::Irssi used when running within irssi.	878	AnyEvent::Impl::Irssi used when running within irssi.
		879	AnyEvent::Impl::IOAsync based on IO::Async.
		880	AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.
		881	AnyEvent::Impl::FLTK based on FLTK (fltk 2 binding).
879		882
880	=item Backends with special needs.	883	=item Backends with special needs.
881		884
882	Qt requires the Qt::Application to be instantiated first, but will	885	Qt requires the Qt::Application to be instantiated first, but will
883	otherwise be picked up automatically. As long as the main program	886	otherwise be picked up automatically. As long as the main program
884	instantiates the application before any AnyEvent watchers are created,	887	instantiates the application before any AnyEvent watchers are created,
885	everything should just work.	888	everything should just work.
886		889
887	AnyEvent::Impl::Qt based on Qt.	890	AnyEvent::Impl::Qt based on Qt.
888
889	Support for IO::Async can only be partial, as it is too broken and
890	architecturally limited to even support the AnyEvent API. It also
891	is the only event loop that needs the loop to be set explicitly, so
892	it can only be used by a main program knowing about AnyEvent. See
893	L<AnyEvent::Impl::IOAsync> for the gory details.
894
895	AnyEvent::Impl::IOAsync based on IO::Async, cannot be autoprobed.
896		891
897	=item Event loops that are indirectly supported via other backends.	892	=item Event loops that are indirectly supported via other backends.
898		893
899	Some event loops can be supported via other modules:	894	Some event loops can be supported via other modules:
900		895
…		…
936		931
937	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model	932	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model
938	if necessary. You should only call this function right before you would	933	if necessary. You should only call this function right before you would
939	have created an AnyEvent watcher anyway, that is, as late as possible at	934	have created an AnyEvent watcher anyway, that is, as late as possible at
940	runtime, and not e.g. during initialisation of your module.	935	runtime, and not e.g. during initialisation of your module.
		936
		937	The effect of calling this function is as if a watcher had been created
		938	(specifically, actions that happen "when the first watcher is created"
		939	happen when calling detetc as well).
941		940
942	If you need to do some initialisation before AnyEvent watchers are	941	If you need to do some initialisation before AnyEvent watchers are
943	created, use C<post_detect>.	942	created, use C<post_detect>.
944		943
945	=item $guard = AnyEvent::post_detect { BLOCK }	944	=item $guard = AnyEvent::post_detect { BLOCK }
…		…
1008	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent	1007	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1009	# as soon as it is	1008	# as soon as it is
1010	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };	1009	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1011	}	1010	}
1012		1011
		1012	=item AnyEvent::postpone { BLOCK }
		1013
		1014	Arranges for the block to be executed as soon as possible, but not before
		1015	the call itself returns. In practise, the block will be executed just
		1016	before the event loop polls for new events, or shortly afterwards.
		1017
		1018	This function never returns anything (to make the C<return postpone { ...
		1019	}> idiom more useful.
		1020
		1021	To understand the usefulness of this function, consider a function that
		1022	asynchronously does something for you and returns some transaction
		1023	object or guard to let you cancel the operation. For example,
		1024	C<AnyEvent::Socket::tcp_connect>:
		1025
		1026	# start a conenction attempt unless one is active
		1027	$self->{connect_guard} \|\|= AnyEvent::Socket::tcp_connect "www.example.net", 80, sub {
		1028	delete $self->{connect_guard};
		1029	...
		1030	};
		1031
		1032	Imagine that this function could instantly call the callback, for
		1033	example, because it detects an obvious error such as a negative port
		1034	number. Invoking the callback before the function returns causes problems
		1035	however: the callback will be called and will try to delete the guard
		1036	object. But since the function hasn't returned yet, there is nothing to
		1037	delete. When the function eventually returns it will assign the guard
		1038	object to C<< $self->{connect_guard} >>, where it will likely never be
		1039	deleted, so the program thinks it is still trying to connect.
		1040
		1041	This is where C<AnyEvent::postpone> should be used. Instead of calling the
		1042	callback directly on error:
		1043
		1044	$cb->(undef), return # signal error to callback, BAD!
		1045	if $some_error_condition;
		1046
		1047	It should use C<postpone>:
		1048
		1049	AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later
		1050	if $some_error_condition;
		1051
		1052	=item AnyEvent::log $level, $msg[, @args]
		1053
		1054	Log the given C<$msg> at the given C<$level>.
		1055
		1056	If L<AnyEvent::Log> is not loaded then this function makes a simple test
		1057	to see whether the message will be logged. If the test succeeds it will
		1058	load AnyEvent::Log and call C<AnyEvent::Log::log> - consequently, look at
		1059	the L<AnyEvent::Log> documentation for details.
		1060
		1061	If the test fails it will simply return. Right now this happens when a
		1062	numerical loglevel is used and it is larger than the level specified via
		1063	C<$ENV{PERL_ANYEVENT_VERBOSE}>.
		1064
		1065	If you want to sprinkle loads of logging calls around your code, consider
		1066	creating a logger callback with the C<AnyEvent::Log::logger> function,
		1067	which can reduce typing, codesize and can reduce the logging overhead
		1068	enourmously.
		1069
1013	=back	1070	=back
1014		1071
1015	=head1 WHAT TO DO IN A MODULE	1072	=head1 WHAT TO DO IN A MODULE
1016		1073
1017	As a module author, you should C<use AnyEvent> and call AnyEvent methods	1074	As a module author, you should C<use AnyEvent> and call AnyEvent methods
…		…
1050	modules might create watchers when they are loaded, and AnyEvent will	1107	modules might create watchers when they are loaded, and AnyEvent will
1051	decide on the event model to use as soon as it creates watchers, and it	1108	decide on the event model to use as soon as it creates watchers, and it
1052	might choose the wrong one unless you load the correct one yourself.	1109	might choose the wrong one unless you load the correct one yourself.
1053		1110
1054	You can chose to use a pure-perl implementation by loading the	1111	You can chose to use a pure-perl implementation by loading the
1055	C<AnyEvent::Impl::Perl> module, which gives you similar behaviour	1112	C<AnyEvent::Loop> module, which gives you similar behaviour
1056	everywhere, but letting AnyEvent chose the model is generally better.	1113	everywhere, but letting AnyEvent chose the model is generally better.
1057		1114
1058	=head2 MAINLOOP EMULATION	1115	=head2 MAINLOOP EMULATION
1059		1116
1060	Sometimes (often for short test scripts, or even standalone programs who	1117	Sometimes (often for short test scripts, or even standalone programs who
…		…
1073		1130
1074		1131
1075	=head1 OTHER MODULES	1132	=head1 OTHER MODULES
1076		1133
1077	The following is a non-exhaustive list of additional modules that use	1134	The following is a non-exhaustive list of additional modules that use
1078	AnyEvent as a client and can therefore be mixed easily with other AnyEvent	1135	AnyEvent as a client and can therefore be mixed easily with other
1079	modules and other event loops in the same program. Some of the modules	1136	AnyEvent modules and other event loops in the same program. Some of the
1080	come as part of AnyEvent, the others are available via CPAN.	1137	modules come as part of AnyEvent, the others are available via CPAN (see
		1138	L<http://search.cpan.org/search?m=module&q=anyevent%3A%3A*> for
		1139	a longer non-exhaustive list), and the list is heavily biased towards
		1140	modules of the AnyEvent author himself :)
1081		1141
1082	=over 4	1142	=over 4
1083		1143
1084	=item L<AnyEvent::Util>	1144	=item L<AnyEvent::Util>
1085		1145
…		…
1105	=item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP>	1165	=item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP>
1106		1166
1107	Implement event-based interfaces to the protocols of the same name (for	1167	Implement event-based interfaces to the protocols of the same name (for
1108	the curious, IGS is the International Go Server and FCP is the Freenet	1168	the curious, IGS is the International Go Server and FCP is the Freenet
1109	Client Protocol).	1169	Client Protocol).
1110
1111	=item L<AnyEvent::Handle::UDP>
1112
1113	Here be danger!
1114
1115	As Pauli would put it, "Not only is it not right, it's not even wrong!" -
1116	there are so many things wrong with AnyEvent::Handle::UDP, most notably
1117	its use of a stream-based API with a protocol that isn't streamable, that
1118	the only way to improve it is to delete it.
1119
1120	It features data corruption (but typically only under load) and general
1121	confusion. On top, the author is not only clueless about UDP but also
1122	fact-resistant - some gems of his understanding: "connect doesn't work
1123	with UDP", "UDP packets are not IP packets", "UDP only has datagrams, not
1124	packets", "I don't need to implement proper error checking as UDP doesn't
1125	support error checking" and so on - he doesn't even understand what's
1126	wrong with his module when it is explained to him.
1127
1128	=item L<AnyEvent::DBI>
1129
1130	Executes L<DBI> requests asynchronously in a proxy process for you,
1131	notifying you in an event-based way when the operation is finished.
1132		1170
1133	=item L<AnyEvent::AIO>	1171	=item L<AnyEvent::AIO>
1134		1172
1135	Truly asynchronous (as opposed to non-blocking) I/O, should be in the	1173	Truly asynchronous (as opposed to non-blocking) I/O, should be in the
1136	toolbox of every event programmer. AnyEvent::AIO transparently fuses	1174	toolbox of every event programmer. AnyEvent::AIO transparently fuses
1137	L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based	1175	L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based
1138	file I/O, and much more.	1176	file I/O, and much more.
1139		1177
		1178	=item L<AnyEvent::Filesys::Notify>
		1179
		1180	AnyEvent is good for non-blocking stuff, but it can't detect file or
		1181	path changes (e.g. "watch this directory for new files", "watch this
		1182	file for changes"). The L<AnyEvent::Filesys::Notify> module promises to
		1183	do just that in a portbale fashion, supporting inotify on GNU/Linux and
		1184	some weird, without doubt broken, stuff on OS X to monitor files. It can
		1185	fall back to blocking scans at regular intervals transparently on other
		1186	platforms, so it's about as portable as it gets.
		1187
		1188	(I haven't used it myself, but I haven't heard anybody complaining about
		1189	it yet).
		1190
		1191	=item L<AnyEvent::DBI>
		1192
		1193	Executes L<DBI> requests asynchronously in a proxy process for you,
		1194	notifying you in an event-based way when the operation is finished.
		1195
1140	=item L<AnyEvent::HTTPD>	1196	=item L<AnyEvent::HTTPD>
1141		1197
1142	A simple embedded webserver.	1198	A simple embedded webserver.
1143		1199
1144	=item L<AnyEvent::FastPing>	1200	=item L<AnyEvent::FastPing>
1145		1201
1146	The fastest ping in the west.	1202	The fastest ping in the west.
1147		1203
1148	=item L<Coro>	1204	=item L<Coro>
1149		1205
1150	Has special support for AnyEvent via L<Coro::AnyEvent>.	1206	Has special support for AnyEvent via L<Coro::AnyEvent>, which allows you
		1207	to simply invert the flow control - don't call us, we will call you:
		1208
		1209	async {
		1210	Coro::AnyEvent::sleep 5; # creates a 5s timer and waits for it
		1211	print "5 seconds later!\n";
		1212
		1213	Coro::AnyEvent::readable *STDIN; # uses an I/O watcher
		1214	my $line = <STDIN>; # works for ttys
		1215
		1216	AnyEvent::HTTP::http_get "url", Coro::rouse_cb;
		1217	my ($body, $hdr) = Coro::rouse_wait;
		1218	};
1151		1219
1152	=back	1220	=back
1153		1221
1154	=cut	1222	=cut
1155		1223
1156	package AnyEvent;	1224	package AnyEvent;
1157		1225
1158	# basically a tuned-down version of common::sense	1226	# basically a tuned-down version of common::sense
1159	sub common_sense {	1227	sub common_sense {
1160	# from common:.sense 3.3	1228	# from common:.sense 3.4
1161	${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf3\x0f\xc0\xf0\xfc\x33\x00";	1229	${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf0\x0f\xc0\xf0\xfc\x33\x00";
1162	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)	1230	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1163	$^H \|= 0x00000600;	1231	$^H \|= 0x00000600;
1164	}	1232	}
1165		1233
1166	BEGIN { AnyEvent::common_sense }	1234	BEGIN { AnyEvent::common_sense }
1167		1235
1168	use Carp ();	1236	use Carp ();
1169		1237
1170	our $VERSION = '5.271';	1238	our $VERSION = '6.14';
1171	our $MODEL;	1239	our $MODEL;
1172
1173	our $AUTOLOAD;
1174	our @ISA;	1240	our @ISA;
1175
1176	our @REGISTRY;	1241	our @REGISTRY;
1177
1178	our $VERBOSE;	1242	our $VERBOSE;
		1243	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
		1244	our $MAX_SIGNAL_LATENCY = $ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY} \|\| 10; # executes after the BEGIN block below (tainting!)
1179		1245
1180	BEGIN {	1246	BEGIN {
1181	require "AnyEvent/constants.pl";	1247	require "AnyEvent/constants.pl";
1182		1248
1183	eval "sub TAINT (){" . (${^TAINT}*1) . "}";	1249	eval "sub TAINT (){" . (${^TAINT}*1) . "}";
1184		1250
1185	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1251	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1186	if ${^TAINT};	1252	if ${^TAINT};
1187		1253
1188	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1254	$ENV{"PERL_ANYEVENT_$_"} = $ENV{"AE_$_"}
		1255	for grep s/^AE_// && !exists $ENV{"PERL_ANYEVENT_$_"}, keys %ENV;
1189		1256
1190	}	1257	@ENV{grep /^PERL_ANYEVENT_/, keys %ENV} = ()
		1258	if ${^TAINT};
1191		1259
1192	our $MAX_SIGNAL_LATENCY = 10;	1260	# $ENV{PERL_ANYEVENT_xxx} now valid
1193		1261
1194	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred	1262	$VERBOSE = length $ENV{PERL_ANYEVENT_VERBOSE} ? $ENV{PERL_ANYEVENT_VERBOSE}*1 : 4;
1195		1263
1196	{
1197	my $idx;	1264	my $idx;
1198	$PROTOCOL{$_} = ++$idx	1265	$PROTOCOL{$_} = ++$idx
1199	for reverse split /\s,\s/,	1266	for reverse split /\s,\s/,
1200	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1267	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1201	}	1268	}
1202		1269
		1270	our @post_detect;
		1271
		1272	sub post_detect(&) {
		1273	my ($cb) = @_;
		1274
		1275	push @post_detect, $cb;
		1276
		1277	defined wantarray
		1278	? bless \$cb, "AnyEvent::Util::postdetect"
		1279	: ()
		1280	}
		1281
		1282	sub AnyEvent::Util::postdetect::DESTROY {
		1283	@post_detect = grep $_ != ${$_[0]}, @post_detect;
		1284	}
		1285
		1286	our $POSTPONE_W;
		1287	our @POSTPONE;
		1288
		1289	sub _postpone_exec {
		1290	undef $POSTPONE_W;
		1291
		1292	&{ shift @POSTPONE }
		1293	while @POSTPONE;
		1294	}
		1295
		1296	sub postpone(&) {
		1297	push @POSTPONE, shift;
		1298
		1299	$POSTPONE_W \|\|= AE::timer (0, 0, \&_postpone_exec);
		1300
		1301	()
		1302	}
		1303
		1304	sub log($$;@) {
		1305	# only load the big bloated module when we actually are about to log something
		1306	if ($_[0] <= ($VERBOSE \|\| 1)) { # also catches non-numeric levels(!) and fatal
		1307	local ($!, $@);
		1308	require AnyEvent::Log; # among other things, sets $VERBOSE to 9
		1309	# AnyEvent::Log overwrites this function
		1310	goto &log;
		1311	}
		1312
		1313	0 # not logged
		1314	}
		1315
		1316	sub _logger($;$) {
		1317	my ($level, $renabled) = @_;
		1318
		1319	$$renabled = $level <= $VERBOSE;
		1320
		1321	my $logger = [(caller)[0], $level, $renabled];
		1322
		1323	$AnyEvent::Log::LOGGER{$logger+0} = $logger;
		1324
		1325	# return unless defined wantarray;
		1326	#
		1327	# require AnyEvent::Util;
		1328	# my $guard = AnyEvent::Util::guard (sub {
		1329	# # "clean up"
		1330	# delete $LOGGER{$logger+0};
		1331	# });
		1332	#
		1333	# sub {
		1334	# return 0 unless $$renabled;
		1335	#
		1336	# $guard if 0; # keep guard alive, but don't cause runtime overhead
		1337	# require AnyEvent::Log unless $AnyEvent::Log::VERSION;
		1338	# package AnyEvent::Log;
		1339	# _log ($logger->[0], $level, @_) # logger->[0] has been converted at load time
		1340	# }
		1341	}
		1342
		1343	if (length $ENV{PERL_ANYEVENT_LOG}) {
		1344	require AnyEvent::Log; # AnyEvent::Log does the thing for us
		1345	}
		1346
1203	my @models = (	1347	our @models = (
1204	[EV:: => AnyEvent::Impl::EV:: , 1],	1348	[EV:: => AnyEvent::Impl::EV::],
1205	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1349	[AnyEvent::Loop:: => AnyEvent::Impl::Perl::],
1206	# everything below here will not (normally) be autoprobed	1350	# everything below here will not (normally) be autoprobed
1207	# as the pureperl backend should work everywhere	1351	# as the pure perl backend should work everywhere
1208	# and is usually faster	1352	# and is usually faster
		1353	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package, so msut be near the top
1209	[Event:: => AnyEvent::Impl::Event::, 1],	1354	[Event:: => AnyEvent::Impl::Event::], # slow, stable
1210	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1355	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers
		1356	# everything below here should not be autoloaded
1211	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1357	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1212	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1213	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1358	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1214	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1359	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1215	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1360	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1216	[Wx:: => AnyEvent::Impl::POE::],	1361	[Wx:: => AnyEvent::Impl::POE::],
1217	[Prima:: => AnyEvent::Impl::POE::],	1362	[Prima:: => AnyEvent::Impl::POE::],
1218	# IO::Async is just too broken - we would need workarounds for its	1363	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1219	# byzantine signal and broken child handling, among others.	1364	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1220	# IO::Async is rather hard to detect, as it doesn't have any	1365	[FLTK:: => AnyEvent::Impl::FLTK::],
1221	# obvious default class.
1222	[IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1223	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1224	[IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
1225	[AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
1226	);	1366	);
1227		1367
1228	our %method = map +($_ => 1),	1368	our @isa_hook;
		1369
		1370	sub _isa_set {
		1371	my @pkg = ("AnyEvent", (map $_->[0], grep defined, @isa_hook), $MODEL);
		1372
		1373	@{"$pkg[$_-1]::ISA"} = $pkg[$_]
		1374	for 1 .. $#pkg;
		1375
		1376	grep $_ && $_->[1], @isa_hook
		1377	and AE::_reset ();
		1378	}
		1379
		1380	# used for hooking AnyEvent::Strict and AnyEvent::Debug::Wrap into the class hierarchy
		1381	sub _isa_hook($$;$) {
		1382	my ($i, $pkg, $reset_ae) = @_;
		1383
		1384	$isa_hook[$i] = $pkg ? [$pkg, $reset_ae] : undef;
		1385
		1386	_isa_set;
		1387	}
		1388
		1389	# all autoloaded methods reserve the complete glob, not just the method slot.
		1390	# due to bugs in perls method cache implementation.
1229	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1391	our @methods = qw(io timer time now now_update signal child idle condvar);
1230
1231	our @post_detect;
1232
1233	sub post_detect(&) {
1234	my ($cb) = @_;
1235
1236	push @post_detect, $cb;
1237
1238	defined wantarray
1239	? bless \$cb, "AnyEvent::Util::postdetect"
1240	: ()
1241	}
1242
1243	sub AnyEvent::Util::postdetect::DESTROY {
1244	@post_detect = grep $_ != ${$_[0]}, @post_detect;
1245	}
1246		1392
1247	sub detect() {	1393	sub detect() {
		1394	return $MODEL if $MODEL; # some programs keep references to detect
		1395
		1396	# IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it
		1397	# the author knows about the problems and what it does to AnyEvent as a whole
		1398	# (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent
		1399	# anyway.
		1400	AnyEvent::log fatal => "AnyEvent: IO::Async::Loop::AnyEvent detected - that module is broken by\n"
		1401	. "design, abuses internals and breaks AnyEvent - will not continue."
		1402	if exists $INC{"IO/Async/Loop/AnyEvent.pm"};
		1403
		1404	local $!; # for good measure
		1405	local $SIG{__DIE__}; # we use eval
		1406
1248	# free some memory	1407	# free some memory
1249	*detect = sub () { $MODEL };	1408	*detect = sub () { $MODEL };
		1409	# undef &func doesn't correctly update the method cache. grmbl.
		1410	# so we delete the whole glob. grmbl.
		1411	# otoh, perl doesn't let me undef an active usb, but it lets me free
		1412	# a glob with an active sub. hrm. i hope it works, but perl is
		1413	# usually buggy in this department. sigh.
		1414	delete @{"AnyEvent::"}{@methods};
		1415	undef @methods;
1250		1416
1251	local $!; # for good measure
1252	local $SIG{__DIE__};
1253
1254	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1417	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1255	my $model = "AnyEvent::Impl::$1";	1418	my $model = $1;
		1419	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1256	if (eval "require $model") {	1420	if (eval "require $model") {
		1421	AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1257	$MODEL = $model;	1422	$MODEL = $model;
1258	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1259	} else {	1423	} else {
1260	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1424	AnyEvent::log 4 => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1261	}	1425	}
1262	}	1426	}
1263		1427
1264	# check for already loaded models	1428	# check for already loaded models
1265	unless ($MODEL) {	1429	unless ($MODEL) {
1266	for (@REGISTRY, @models) {	1430	for (@REGISTRY, @models) {
1267	my ($package, $model) = @$_;	1431	my ($package, $model) = @$_;
1268	if (${"$package\::VERSION"} > 0) {	1432	if (${"$package\::VERSION"} > 0) {
1269	if (eval "require $model") {	1433	if (eval "require $model") {
		1434	AnyEvent::log 7 => "autodetected model '$model', using it.";
1270	$MODEL = $model;	1435	$MODEL = $model;
1271	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;	1436	last;
		1437	} else {
		1438	AnyEvent::log 8 => "detected event loop $package, but cannot load '$model', skipping: $@";
		1439	}
		1440	}
		1441	}
		1442
		1443	unless ($MODEL) {
		1444	# try to autoload a model
		1445	for (@REGISTRY, @models) {
		1446	my ($package, $model) = @$_;
		1447	if (
		1448	eval "require $package"
		1449	and ${"$package\::VERSION"} > 0
		1450	and eval "require $model"
		1451	) {
		1452	AnyEvent::log 7 => "autoloaded model '$model', using it.";
		1453	$MODEL = $model;
1272	last;	1454	last;
1273	}	1455	}
1274	}	1456	}
1275	}
1276
1277	unless ($MODEL) {
1278	# try to autoload a model
1279	for (@REGISTRY, @models) {
1280	my ($package, $model, $autoload) = @$_;
1281	if (
1282	$autoload
1283	and eval "require $package"
1284	and ${"$package\::VERSION"} > 0
1285	and eval "require $model"
1286	) {
1287	$MODEL = $model;
1288	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1289	last;
1290	}
1291	}
1292		1457
1293	$MODEL	1458	$MODEL
1294	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";	1459	or AnyEvent::log fatal => "AnyEvent: backend autodetection failed - did you properly install AnyEvent?";
1295	}	1460	}
1296	}	1461	}
1297		1462
1298	@models = (); # free probe data	1463	# free memory only needed for probing
		1464	undef @models;
		1465	undef @REGISTRY;
1299		1466
1300	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1467	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1301	unshift @ISA, $MODEL;
1302		1468
1303	# now nuke some methods that are overriden by the backend.	1469	# now nuke some methods that are overridden by the backend.
1304	# SUPER is not allowed.	1470	# SUPER usage is not allowed in these.
1305	for (qw(time signal child idle)) {	1471	for (qw(time signal child idle)) {
1306	undef &{"AnyEvent::Base::$_"}	1472	undef &{"AnyEvent::Base::$_"}
1307	if defined &{"$MODEL\::$_"};	1473	if defined &{"$MODEL\::$_"};
1308	}	1474	}
1309		1475
1310	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};	1476	_isa_set;
		1477
		1478	# we're officially open!
		1479
		1480	if ($ENV{PERL_ANYEVENT_STRICT}) {
		1481	require AnyEvent::Strict;
		1482	}
		1483
		1484	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1485	require AnyEvent::Debug;
		1486	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1487	}
		1488
		1489	if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1490	require AnyEvent::Socket;
		1491	require AnyEvent::Debug;
		1492
		1493	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1494	$shell =~ s/\$\$/$$/g;
		1495
		1496	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1497	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1498	}
		1499
		1500	# now the anyevent environment is set up as the user told us to, so
		1501	# call the actual user code - post detects
1311		1502
1312	(shift @post_detect)->() while @post_detect;	1503	(shift @post_detect)->() while @post_detect;
		1504	undef @post_detect;
1313		1505
1314	*post_detect = sub(&) {	1506	*post_detect = sub(&) {
1315	shift->();	1507	shift->();
1316		1508
1317	undef	1509	undef
1318	};	1510	};
1319		1511
1320	$MODEL	1512	$MODEL
1321	}	1513	}
1322		1514
1323	sub AUTOLOAD {	1515	for my $name (@methods) {
1324	(my $func = $AUTOLOAD) =~ s/.*://;	1516	*$name = sub {
1325
1326	$method{$func}
1327	or Carp::croak "$func: not a valid AnyEvent class method";
1328
1329	detect;	1517	detect;
1330		1518	# we use goto because
1331	my $class = shift;	1519	# a) it makes the thunk more transparent
1332	$class->$func (@_);	1520	# b) it allows us to delete the thunk later
		1521	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
		1522	};
1333	}	1523	}
1334		1524
1335	# utility function to dup a filehandle. this is used by many backends	1525	# utility function to dup a filehandle. this is used by many backends
1336	# to support binding more than one watcher per filehandle (they usually	1526	# to support binding more than one watcher per filehandle (they usually
1337	# allow only one watcher per fd, so we dup it to get a different one).	1527	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1361		1551
1362	package AE;	1552	package AE;
1363		1553
1364	our $VERSION = $AnyEvent::VERSION;	1554	our $VERSION = $AnyEvent::VERSION;
1365		1555
		1556	sub _reset() {
		1557	eval q{
1366	# fall back to the main API by default - backends and AnyEvent::Base	1558	# fall back to the main API by default - backends and AnyEvent::Base
1367	# implementations can overwrite these.	1559	# implementations can overwrite these.
1368		1560
1369	sub io($$$) {	1561	sub io($$$) {
1370	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1562	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1371	}	1563	}
1372		1564
1373	sub timer($$$) {	1565	sub timer($$$) {
1374	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1566	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1375	}	1567	}
1376		1568
1377	sub signal($$) {	1569	sub signal($$) {
1378	AnyEvent->signal (signal => $_[0], cb => $_[1])	1570	AnyEvent->signal (signal => $_[0], cb => $_[1])
1379	}	1571	}
1380		1572
1381	sub child($$) {	1573	sub child($$) {
1382	AnyEvent->child (pid => $_[0], cb => $_[1])	1574	AnyEvent->child (pid => $_[0], cb => $_[1])
1383	}	1575	}
1384		1576
1385	sub idle($) {	1577	sub idle($) {
1386	AnyEvent->idle (cb => $_[0])	1578	AnyEvent->idle (cb => $_[0]);
1387	}	1579	}
1388		1580
1389	sub cv(;&) {	1581	sub cv(;&) {
1390	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1582	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1391	}	1583	}
1392		1584
1393	sub now() {	1585	sub now() {
1394	AnyEvent->now	1586	AnyEvent->now
1395	}	1587	}
1396		1588
1397	sub now_update() {	1589	sub now_update() {
1398	AnyEvent->now_update	1590	AnyEvent->now_update
1399	}	1591	}
1400		1592
1401	sub time() {	1593	sub time() {
1402	AnyEvent->time	1594	AnyEvent->time
		1595	}
		1596
		1597	*postpone = \&AnyEvent::postpone;
		1598	*log = \&AnyEvent::log;
		1599	};
		1600	die if $@;
1403	}	1601	}
		1602
		1603	BEGIN { _reset }
1404		1604
1405	package AnyEvent::Base;	1605	package AnyEvent::Base;
1406		1606
1407	# default implementations for many methods	1607	# default implementations for many methods
1408		1608
1409	sub time {	1609	sub time {
1410	eval q{ # poor man's autoloading {}	1610	eval q{ # poor man's autoloading {}
1411	# probe for availability of Time::HiRes	1611	# probe for availability of Time::HiRes
1412	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1612	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1413	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1613	*time = sub { Time::HiRes::time () };
1414	*AE::time = \&Time::HiRes::time;	1614	*AE::time = \& Time::HiRes::time ;
		1615	*now = \&time;
		1616	AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy.";
1415	# if (eval "use POSIX (); (POSIX::times())...	1617	# if (eval "use POSIX (); (POSIX::times())...
1416	} else {	1618	} else {
		1619	*time = sub { CORE::time };
		1620	*AE::time = sub (){ CORE::time };
		1621	*now = \&time;
1417	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1622	AnyEvent::log 3 => "using built-in time(), WARNING, no sub-second resolution!";
1418	*AE::time = sub (){ time }; # epic fail
1419	}	1623	}
1420
1421	*time = sub { AE::time }; # different prototypes
1422	};	1624	};
1423	die if $@;	1625	die if $@;
1424		1626
1425	&time	1627	&time
1426	}	1628	}
1427		1629
1428	*now = \&time;	1630	*now = \&time;
1429
1430	sub now_update { }	1631	sub now_update { }
1431		1632
		1633	sub _poll {
		1634	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
		1635	}
		1636
1432	# default implementation for ->condvar	1637	# default implementation for ->condvar
		1638	# in fact, the default should not be overwritten
1433		1639
1434	sub condvar {	1640	sub condvar {
1435	eval q{ # poor man's autoloading {}	1641	eval q{ # poor man's autoloading {}
1436	*condvar = sub {	1642	*condvar = sub {
1437	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1643	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
…		…
1515		1721
1516	sub signal {	1722	sub signal {
1517	eval q{ # poor man's autoloading {}	1723	eval q{ # poor man's autoloading {}
1518	# probe for availability of Async::Interrupt	1724	# probe for availability of Async::Interrupt
1519	if (_have_async_interrupt) {	1725	if (_have_async_interrupt) {
1520	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1726	AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling.";
1521		1727
1522	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1728	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1523	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1729	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1524		1730
1525	} else {	1731	} else {
1526	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1732	AnyEvent::log 8 => "using emulated perl signal handling with latency timer.";
1527		1733
1528	if (AnyEvent::WIN32) {	1734	if (AnyEvent::WIN32) {
1529	require AnyEvent::Util;	1735	require AnyEvent::Util;
1530		1736
1531	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1737	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1607	: sysread $SIGPIPE_R, (my $dummy), 9;	1813	: sysread $SIGPIPE_R, (my $dummy), 9;
1608		1814
1609	while (%SIG_EV) {	1815	while (%SIG_EV) {
1610	for (keys %SIG_EV) {	1816	for (keys %SIG_EV) {
1611	delete $SIG_EV{$_};	1817	delete $SIG_EV{$_};
1612	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1818	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1613	}	1819	}
1614	}	1820	}
1615	};	1821	};
1616	};	1822	};
1617	die if $@;	1823	die if $@;
…		…
1622	# default implementation for ->child	1828	# default implementation for ->child
1623		1829
1624	our %PID_CB;	1830	our %PID_CB;
1625	our $CHLD_W;	1831	our $CHLD_W;
1626	our $CHLD_DELAY_W;	1832	our $CHLD_DELAY_W;
1627	our $WNOHANG;
1628		1833
1629	# used by many Impl's	1834	# used by many Impl's
1630	sub _emit_childstatus($$) {	1835	sub _emit_childstatus($$) {
1631	my (undef, $rpid, $rstatus) = @_;	1836	my (undef, $rpid, $rstatus) = @_;
1632		1837
…		…
1639	eval q{ # poor man's autoloading {}	1844	eval q{ # poor man's autoloading {}
1640	*_sigchld = sub {	1845	*_sigchld = sub {
1641	my $pid;	1846	my $pid;
1642		1847
1643	AnyEvent->_emit_childstatus ($pid, $?)	1848	AnyEvent->_emit_childstatus ($pid, $?)
1644	while ($pid = waitpid -1, $WNOHANG) > 0;	1849	while ($pid = waitpid -1, WNOHANG) > 0;
1645	};	1850	};
1646		1851
1647	*child = sub {	1852	*child = sub {
1648	my (undef, %arg) = @_;	1853	my (undef, %arg) = @_;
1649		1854
1650	defined (my $pid = $arg{pid} + 0)	1855	my $pid = $arg{pid};
1651	or Carp::croak "required option 'pid' is missing";	1856	my $cb = $arg{cb};
1652		1857
1653	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1858	$PID_CB{$pid}{$cb+0} = $cb;
1654
1655	# WNOHANG is almost cetrainly 1 everywhere
1656	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1657	? 1
1658	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1659		1859
1660	unless ($CHLD_W) {	1860	unless ($CHLD_W) {
1661	$CHLD_W = AE::signal CHLD => \&_sigchld;	1861	$CHLD_W = AE::signal CHLD => \&_sigchld;
1662	# child could be a zombie already, so make at least one round	1862	# child could be a zombie already, so make at least one round
1663	&_sigchld;	1863	&_sigchld;
1664	}	1864	}
1665		1865
1666	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1866	bless [$pid, $cb+0], "AnyEvent::Base::child"
1667	};	1867	};
1668		1868
1669	*AnyEvent::Base::child::DESTROY = sub {	1869	*AnyEvent::Base::child::DESTROY = sub {
1670	my ($pid, $cb) = @{$_[0]};	1870	my ($pid, $icb) = @{$_[0]};
1671		1871
1672	delete $PID_CB{$pid}{$cb};	1872	delete $PID_CB{$pid}{$icb};
1673	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1873	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1674		1874
1675	undef $CHLD_W unless keys %PID_CB;	1875	undef $CHLD_W unless keys %PID_CB;
1676	};	1876	};
1677	};	1877	};
…		…
1690		1890
1691	my ($cb, $w, $rcb) = $arg{cb};	1891	my ($cb, $w, $rcb) = $arg{cb};
1692		1892
1693	$rcb = sub {	1893	$rcb = sub {
1694	if ($cb) {	1894	if ($cb) {
1695	$w = _time;	1895	$w = AE::time;
1696	&$cb;	1896	&$cb;
1697	$w = _time - $w;	1897	$w = AE::time - $w;
1698		1898
1699	# never use more then 50% of the time for the idle watcher,	1899	# never use more then 50% of the time for the idle watcher,
1700	# within some limits	1900	# within some limits
1701	$w = 0.0001 if $w < 0.0001;	1901	$w = 0.0001 if $w < 0.0001;
1702	$w = 5 if $w > 5;	1902	$w = 5 if $w > 5;
…		…
1749		1949
1750	sub _send {	1950	sub _send {
1751	# nop	1951	# nop
1752	}	1952	}
1753		1953
		1954	sub _wait {
		1955	AnyEvent->_poll until $_[0]{_ae_sent};
		1956	}
		1957
1754	sub send {	1958	sub send {
1755	my $cv = shift;	1959	my $cv = shift;
1756	$cv->{_ae_sent} = [@_];	1960	$cv->{_ae_sent} = [@_];
1757	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};	1961	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1758	$cv->_send;	1962	$cv->_send;
…		…
1765		1969
1766	sub ready {	1970	sub ready {
1767	$_[0]{_ae_sent}	1971	$_[0]{_ae_sent}
1768	}	1972	}
1769		1973
1770	sub _wait {
1771	$WAITING
1772	and !$_[0]{_ae_sent}
1773	and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1774
1775	local $WAITING = 1;
1776	AnyEvent->one_event while !$_[0]{_ae_sent};
1777	}
1778
1779	sub recv {	1974	sub recv {
		1975	unless ($_[0]{_ae_sent}) {
		1976	$WAITING
		1977	and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
		1978
		1979	local $WAITING = 1;
1780	$_[0]->_wait;	1980	$_[0]->_wait;
		1981	}
1781		1982
1782	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1983	$_[0]{_ae_croak}
1783	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1984	and Carp::croak $_[0]{_ae_croak};
		1985
		1986	wantarray
		1987	? @{ $_[0]{_ae_sent} }
		1988	: $_[0]{_ae_sent}[0]
1784	}	1989	}
1785		1990
1786	sub cb {	1991	sub cb {
1787	my $cv = shift;	1992	my $cv = shift;
1788		1993
…		…
1804	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };	2009	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };
1805	}	2010	}
1806		2011
1807	# undocumented/compatibility with pre-3.4	2012	# undocumented/compatibility with pre-3.4
1808	*broadcast = \&send;	2013	*broadcast = \&send;
1809	*wait = \&_wait;	2014	*wait = \&recv;
1810		2015
1811	=head1 ERROR AND EXCEPTION HANDLING	2016	=head1 ERROR AND EXCEPTION HANDLING
1812		2017
1813	In general, AnyEvent does not do any error handling - it relies on the	2018	In general, AnyEvent does not do any error handling - it relies on the
1814	caller to do that if required. The L<AnyEvent::Strict> module (see also	2019	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
1826	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and	2031	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
1827	so on.	2032	so on.
1828		2033
1829	=head1 ENVIRONMENT VARIABLES	2034	=head1 ENVIRONMENT VARIABLES
1830		2035
1831	The following environment variables are used by this module or its	2036	AnyEvent supports a number of environment variables that tune the
1832	submodules.	2037	runtime behaviour. They are usually evaluated when AnyEvent is
		2038	loaded, initialised, or a submodule that uses them is loaded. Many of
		2039	them also cause AnyEvent to load additional modules - for example,
		2040	C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be
		2041	loaded.
1833		2042
1834	Note that AnyEvent will remove I<all> environment variables starting with	2043	All the environment variables documented here start with
1835	C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is	2044	C<PERL_ANYEVENT_>, which is what AnyEvent considers its own
1836	enabled.	2045	namespace. Other modules are encouraged (but by no means required) to use
		2046	C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule
		2047	namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could
		2048	be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env
		2049	variables starting with C<AE_>, see below).
		2050
		2051	All variables can also be set via the C<AE_> prefix, that is, instead
		2052	of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In
		2053	case there is a clash btween anyevent and another program that uses
		2054	C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something>
		2055	variable to the empty string, as those variables take precedence.
		2056
		2057	When AnyEvent is first loaded, it copies all C<AE_xxx> env variables
		2058	to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already
		2059	exists. If taint mode is on, then AnyEvent will remove I<all> environment
		2060	variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them
		2061	with C<undef> or the empty string, if the corresaponding C<AE_> variable
		2062	is set).
		2063
		2064	The exact algorithm is currently:
		2065
		2066	1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV
		2067	2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists
		2068	3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef.
		2069
		2070	This ensures that child processes will not see the C<AE_> variables.
		2071
		2072	The following environment variables are currently known to AnyEvent:
1837		2073
1838	=over 4	2074	=over 4
1839		2075
1840	=item C<PERL_ANYEVENT_VERBOSE>	2076	=item C<PERL_ANYEVENT_VERBOSE>
1841		2077
1842	By default, AnyEvent will be completely silent except in fatal	2078	By default, AnyEvent will log messages with loglevel C<4> (C<error>) or
1843	conditions. You can set this environment variable to make AnyEvent more	2079	higher (see L<AnyEvent::Log>). You can set this environment variable to a
1844	talkative.	2080	numerical loglevel to make AnyEvent more (or less) talkative.
1845		2081
		2082	If you want to do more than just set the global logging level
		2083	you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
		2084	complex specifications.
		2085
		2086	When set to C<0> (C<off>), then no messages whatsoever will be logged with
		2087	everything else at defaults.
		2088
1846	When set to C<1> or higher, causes AnyEvent to warn about unexpected	2089	When set to C<5> or higher (C<warn>), AnyEvent warns about unexpected
1847	conditions, such as not being able to load the event model specified by	2090	conditions, such as not being able to load the event model specified by
1848	C<PERL_ANYEVENT_MODEL>.	2091	C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an exception - this
		2092	is the minimum recommended level for use during development.
1849		2093
1850	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	2094	When set to C<7> or higher (info), AnyEvent reports which event model it
1851	model it chooses.	2095	chooses.
1852		2096
1853	When set to C<8> or higher, then AnyEvent will report extra information on	2097	When set to C<8> or higher (debug), then AnyEvent will report extra
1854	which optional modules it loads and how it implements certain features.	2098	information on which optional modules it loads and how it implements
		2099	certain features.
		2100
		2101	=item C<PERL_ANYEVENT_LOG>
		2102
		2103	Accepts rather complex logging specifications. For example, you could log
		2104	all C<debug> messages of some module to stderr, warnings and above to
		2105	stderr, and errors and above to syslog, with:
		2106
		2107	PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog
		2108
		2109	For the rather extensive details, see L<AnyEvent::Log>.
		2110
		2111	This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
		2112	so will take effect even before AnyEvent has initialised itself.
		2113
		2114	Note that specifying this environment variable causes the L<AnyEvent::Log>
		2115	module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
		2116	using the latter saves a few hundred kB of memory unless a module
		2117	explicitly needs the extra features of AnyEvent::Log.
1855		2118
1856	=item C<PERL_ANYEVENT_STRICT>	2119	=item C<PERL_ANYEVENT_STRICT>
1857		2120
1858	AnyEvent does not do much argument checking by default, as thorough	2121	AnyEvent does not do much argument checking by default, as thorough
1859	argument checking is very costly. Setting this variable to a true value	2122	argument checking is very costly. Setting this variable to a true value
…		…
1866	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>	2129	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>
1867	>>, it is definitely recommended to keep it off in production. Keeping	2130	>>, it is definitely recommended to keep it off in production. Keeping
1868	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2131	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1869	can be very useful, however.	2132	can be very useful, however.
1870		2133
		2134	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2135
		2136	If this env variable is nonempty, then its contents will be interpreted by
		2137	C<AnyEvent::Socket::parse_hostport> and C<AnyEvent::Debug::shell> (after
		2138	replacing every occurance of C<$$> by the process pid). The shell object
		2139	is saved in C<$AnyEvent::Debug::SHELL>.
		2140
		2141	This happens when the first watcher is created.
		2142
		2143	For example, to bind a debug shell on a unix domain socket in
		2144	F<< /tmp/debug<pid>.sock >>, you could use this:
		2145
		2146	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2147	# connect with e.g.: socat readline /tmp/debug123.sock
		2148
		2149	Or to bind to tcp port 4545 on localhost:
		2150
		2151	PERL_ANYEVENT_DEBUG_SHELL=127.0.0.1:4545 perlprog
		2152	# connect with e.g.: telnet localhost 4545
		2153
		2154	Note that creating sockets in F</tmp> or on localhost is very unsafe on
		2155	multiuser systems.
		2156
		2157	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2158
		2159	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2160	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2161
1871	=item C<PERL_ANYEVENT_MODEL>	2162	=item C<PERL_ANYEVENT_MODEL>
1872		2163
1873	This can be used to specify the event model to be used by AnyEvent, before	2164	This can be used to specify the event model to be used by AnyEvent, before
1874	auto detection and -probing kicks in. It must be a string consisting	2165	auto detection and -probing kicks in.
1875	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2166
		2167	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2168	or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1876	and the resulting module name is loaded and if the load was successful,	2169	resulting module name is loaded and - if the load was successful - used as
1877	used as event model. If it fails to load AnyEvent will proceed with	2170	event model backend. If it fails to load then AnyEvent will proceed with
1878	auto detection and -probing.	2171	auto detection and -probing.
1879		2172
1880	This functionality might change in future versions.	2173	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2174	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2175	the end of a string designates a module name and quotes it appropriately).
1881		2176
1882	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you	2177	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1883	could start your program like this:	2178	could start your program like this:
1884		2179
1885	PERL_ANYEVENT_MODEL=Perl perl ...	2180	PERL_ANYEVENT_MODEL=Perl perl ...
1886		2181
1887	=item C<PERL_ANYEVENT_PROTOCOLS>	2182	=item C<PERL_ANYEVENT_PROTOCOLS>
…		…
1903	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>	2198	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1904	- only support IPv4, never try to resolve or contact IPv6	2199	- only support IPv4, never try to resolve or contact IPv6
1905	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or	2200	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1906	IPv6, but prefer IPv6 over IPv4.	2201	IPv6, but prefer IPv6 over IPv4.
1907		2202
		2203	=item C<PERL_ANYEVENT_HOSTS>
		2204
		2205	This variable, if specified, overrides the F</etc/hosts> file used by
		2206	L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read
		2207	from that file instead.
		2208
1908	=item C<PERL_ANYEVENT_EDNS0>	2209	=item C<PERL_ANYEVENT_EDNS0>
1909		2210
1910	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension	2211	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension for
1911	for DNS. This extension is generally useful to reduce DNS traffic, but	2212	DNS. This extension is generally useful to reduce DNS traffic, especially
1912	some (broken) firewalls drop such DNS packets, which is why it is off by	2213	when DNSSEC is involved, but some (broken) firewalls drop such DNS
1913	default.	2214	packets, which is why it is off by default.
1914		2215
1915	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	2216	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1916	EDNS0 in its DNS requests.	2217	EDNS0 in its DNS requests.
1917		2218
1918	=item C<PERL_ANYEVENT_MAX_FORKS>	2219	=item C<PERL_ANYEVENT_MAX_FORKS>
…		…
1924		2225
1925	The default value for the C<max_outstanding> parameter for the default DNS	2226	The default value for the C<max_outstanding> parameter for the default DNS
1926	resolver - this is the maximum number of parallel DNS requests that are	2227	resolver - this is the maximum number of parallel DNS requests that are
1927	sent to the DNS server.	2228	sent to the DNS server.
1928		2229
		2230	=item C<PERL_ANYEVENT_MAX_SIGNAL_LATENCY>
		2231
		2232	Perl has inherently racy signal handling (you can basically choose between
		2233	losing signals and memory corruption) - pure perl event loops (including
		2234	C<AnyEvent::Loop>, when C<Async::Interrupt> isn't available) therefore
		2235	have to poll regularly to avoid losing signals.
		2236
		2237	Some event loops are racy, but don't poll regularly, and some event loops
		2238	are written in C but are still racy. For those event loops, AnyEvent
		2239	installs a timer that regularly wakes up the event loop.
		2240
		2241	By default, the interval for this timer is C<10> seconds, but you can
		2242	override this delay with this environment variable (or by setting
		2243	the C<$AnyEvent::MAX_SIGNAL_LATENCY> variable before creating signal
		2244	watchers).
		2245
		2246	Lower values increase CPU (and energy) usage, higher values can introduce
		2247	long delays when reaping children or waiting for signals.
		2248
		2249	The L<AnyEvent::Async> module, if available, will be used to avoid this
		2250	polling (with most event loops).
		2251
1929	=item C<PERL_ANYEVENT_RESOLV_CONF>	2252	=item C<PERL_ANYEVENT_RESOLV_CONF>
1930		2253
1931	The file to use instead of F</etc/resolv.conf> (or OS-specific	2254	The absolute path to a F<resolv.conf>-style file to use instead of
1932	configuration) in the default resolver. When set to the empty string, no	2255	F</etc/resolv.conf> (or the OS-specific configuration) in the default
1933	default config will be used.	2256	resolver, or the empty string to select the default configuration.
1934		2257
1935	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.	2258	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.
1936		2259
1937	When neither C<ca_file> nor C<ca_path> was specified during	2260	When neither C<ca_file> nor C<ca_path> was specified during
1938	L<AnyEvent::TLS> context creation, and either of these environment	2261	L<AnyEvent::TLS> context creation, and either of these environment
1939	variables exist, they will be used to specify CA certificate locations	2262	variables are nonempty, they will be used to specify CA certificate
1940	instead of a system-dependent default.	2263	locations instead of a system-dependent default.
1941		2264
1942	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>	2265	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>
1943		2266
1944	When these are set to C<1>, then the respective modules are not	2267	When these are set to C<1>, then the respective modules are not
1945	loaded. Mostly good for testing AnyEvent itself.	2268	loaded. Mostly good for testing AnyEvent itself.
…		…
2277	(even when used without AnyEvent), but most event loops have acceptable	2600	(even when used without AnyEvent), but most event loops have acceptable
2278	performance with or without AnyEvent.	2601	performance with or without AnyEvent.
2279		2602
2280	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2603	=item * The overhead AnyEvent adds is usually much smaller than the overhead of
2281	the actual event loop, only with extremely fast event loops such as EV	2604	the actual event loop, only with extremely fast event loops such as EV
2282	adds AnyEvent significant overhead.	2605	does AnyEvent add significant overhead.
2283		2606
2284	=item * You should avoid POE like the plague if you want performance or	2607	=item * You should avoid POE like the plague if you want performance or
2285	reasonable memory usage.	2608	reasonable memory usage.
2286		2609
2287	=back	2610	=back
…		…
2586		2909
2587	=item L<Time::HiRes>	2910	=item L<Time::HiRes>
2588		2911
2589	This module is part of perl since release 5.008. It will be used when the	2912	This module is part of perl since release 5.008. It will be used when the
2590	chosen event library does not come with a timing source of its own. The	2913	chosen event library does not come with a timing source of its own. The
2591	pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to	2914	pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2592	try to use a monotonic clock for timing stability.	2915	try to use a monotonic clock for timing stability.
2593		2916
2594	=back	2917	=back
2595		2918
2596		2919
…		…
2658	pronounced).	2981	pronounced).
2659		2982
2660		2983
2661	=head1 SEE ALSO	2984	=head1 SEE ALSO
2662		2985
2663	Utility functions: L<AnyEvent::Util>.	2986	Tutorial/Introduction: L<AnyEvent::Intro>.
2664		2987
2665	Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>,	2988	FAQ: L<AnyEvent::FAQ>.
2666	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2989
		2990	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		2991	(simply logging).
		2992
		2993	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
		2994	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		2995
		2996	Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>,
		2997	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		2998	L<Qt>, L<POE>, L<FLTK>.
2667		2999
2668	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	3000	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2669	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	3001	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2670	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	3002	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2671	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	3003	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		3004	L<AnyEvent::Impl::FLTK>.
2672		3005
2673	Non-blocking file handles, sockets, TCP clients and	3006	Non-blocking handles, pipes, stream sockets, TCP clients and
2674	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	3007	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2675		3008
2676	Asynchronous DNS: L<AnyEvent::DNS>.	3009	Asynchronous DNS: L<AnyEvent::DNS>.
2677		3010
2678	Coroutine support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>,	3011	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
2679	L<Coro::Event>,
2680		3012
2681	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::XMPP>,	3013	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,
2682	L<AnyEvent::HTTP>.	3014	L<AnyEvent::HTTP>.
2683		3015
2684		3016
2685	=head1 AUTHOR	3017	=head1 AUTHOR
2686		3018

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.333 by root, Tue Oct 12 06:47:54 2010 UTC vs. Revision 1.397 by root, Thu Mar 22 18:00:35 2012 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.333 by root, Tue Oct 12 06:47:54 2010 UTC vs.
Revision 1.397 by root, Thu Mar 22 18:00:35 2012 UTC