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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.332 by root, Tue Aug 31 23:32:40 2010 UTC vs.
Revision 1.388 by root, Sun Oct 2 01:22:01 2011 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 Ö<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 = '6.02';
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($$;@) {
		1305	# only load the big bloated module when we actually are about to log something
		1306	if ($_[0] <= ($VERBOSE \|\| 1)) { # also catches non-numeric levels(!) and fatal
		1307	local ($!, $@);
		1308	require AnyEvent::Log; # among other things, sets $VERBOSE to 9
		1309	# AnyEvent::Log overwrites this function
		1310	goto &log;
		1311	}
		1312
		1313	0 # not logged
		1314	}
		1315
		1316	sub logger($;$) {
		1317	package AnyEvent::Log;
		1318
		1319	my ($level, $renabled) = @_;
		1320
		1321	$$renabled = $level <= $VERBOSE;
		1322
		1323	my $pkg = (caller)[0];
		1324
		1325	my $logger = [$pkg, $level, $renabled];
		1326
		1327	our %LOGGER;
		1328	$LOGGER{$logger+0} = $logger;
		1329
		1330	return unless defined wantarray;
		1331
		1332	require AnyEvent::Util;
		1333	my $guard = AnyEvent::Util::guard (sub {
		1334	# "clean up"
		1335	delete $LOGGER{$logger+0};
		1336	});
		1337
		1338	sub {
		1339	return 0 unless $$renabled;
		1340
		1341	$guard if 0; # keep guard alive, but don't cause runtime overhead
		1342	require AnyEvent::Log unless $AnyEvent::Log::VERSION;
		1343	package AnyEvent::Log;
		1344	_log ($logger->[0], $level, @_) # logger->[0] has been converted at load time
		1345	}
		1346	}
		1347
		1348	if (length $ENV{PERL_ANYEVENT_LOG}) {
		1349	require AnyEvent::Log; # AnyEvent::Log does the thing for us
		1350	}
		1351
1203	my @models = (	1352	our @models = (
1204	[EV:: => AnyEvent::Impl::EV:: , 1],	1353	[EV:: => AnyEvent::Impl::EV::],
1205	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1354	[AnyEvent::Loop:: => AnyEvent::Impl::Perl::],
1206	# everything below here will not (normally) be autoprobed	1355	# everything below here will not (normally) be autoprobed
1207	# as the pureperl backend should work everywhere	1356	# as the pure perl backend should work everywhere
1208	# and is usually faster	1357	# and is usually faster
		1358	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package, so msut be near the top
1209	[Event:: => AnyEvent::Impl::Event::, 1],	1359	[Event:: => AnyEvent::Impl::Event::], # slow, stable
1210	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1360	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers
		1361	# everything below here should not be autoloaded
1211	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1362	[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	1363	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1214	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1364	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1215	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1365	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1216	[Wx:: => AnyEvent::Impl::POE::],	1366	[Wx:: => AnyEvent::Impl::POE::],
1217	[Prima:: => AnyEvent::Impl::POE::],	1367	[Prima:: => AnyEvent::Impl::POE::],
1218	# IO::Async is just too broken - we would need workarounds for its	1368	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1219	# byzantine signal and broken child handling, among others.	1369	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1220	# IO::Async is rather hard to detect, as it doesn't have any	1370	[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	);	1371	);
1227		1372
1228	our %method = map +($_ => 1),	1373	our @isa_hook;
		1374
		1375	sub _isa_set {
		1376	my @pkg = ("AnyEvent", (map $_->[0], grep defined, @isa_hook), $MODEL);
		1377
		1378	@{"$pkg[$_-1]::ISA"} = $pkg[$_]
		1379	for 1 .. $#pkg;
		1380
		1381	grep $_ && $_->[1], @isa_hook
		1382	and AE::_reset ();
		1383	}
		1384
		1385	# used for hooking AnyEvent::Strict and AnyEvent::Debug::Wrap into the class hierarchy
		1386	sub _isa_hook($$;$) {
		1387	my ($i, $pkg, $reset_ae) = @_;
		1388
		1389	$isa_hook[$i] = $pkg ? [$pkg, $reset_ae] : undef;
		1390
		1391	_isa_set;
		1392	}
		1393
		1394	# all autoloaded methods reserve the complete glob, not just the method slot.
		1395	# due to bugs in perls method cache implementation.
1229	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1396	our @methods = qw(io timer time now now_update signal child idle condvar);
1230
1231	our @post_detect;
1232
1233	sub post_detect(&) {
1234	my ($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		1397
1247	sub detect() {	1398	sub detect() {
		1399	return $MODEL if $MODEL; # some programs keep references to detect
		1400
		1401	# IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it
		1402	# the author knows about the problems and what it does to AnyEvent as a whole
		1403	# (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent
		1404	# anyway.
		1405	AnyEvent::log fatal => "AnyEvent: IO::Async::Loop::AnyEvent detected - this module is broken by design,\n"
		1406	. "abuses internals and breaks AnyEvent, will not continue."
		1407	if exists $INC{"IO/Async/Loop/AnyEvent.pm"};
		1408
		1409	local $!; # for good measure
		1410	local $SIG{__DIE__}; # we use eval
		1411
1248	# free some memory	1412	# free some memory
1249	*detect = sub () { $MODEL };	1413	*detect = sub () { $MODEL };
		1414	# undef &func doesn't correctly update the method cache. grmbl.
		1415	# so we delete the whole glob. grmbl.
		1416	# otoh, perl doesn't let me undef an active usb, but it lets me free
		1417	# a glob with an active sub. hrm. i hope it works, but perl is
		1418	# usually buggy in this department. sigh.
		1419	delete @{"AnyEvent::"}{@methods};
		1420	undef @methods;
1250		1421
1251	local $!; # for good measure
1252	local $SIG{__DIE__};
1253
1254	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1422	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1255	my $model = "AnyEvent::Impl::$1";	1423	my $model = $1;
		1424	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1256	if (eval "require $model") {	1425	if (eval "require $model") {
		1426	AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1257	$MODEL = $model;	1427	$MODEL = $model;
1258	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1259	} else {	1428	} else {
1260	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1429	AnyEvent::log 4 => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1261	}	1430	}
1262	}	1431	}
1263		1432
1264	# check for already loaded models	1433	# check for already loaded models
1265	unless ($MODEL) {	1434	unless ($MODEL) {
1266	for (@REGISTRY, @models) {	1435	for (@REGISTRY, @models) {
1267	my ($package, $model) = @$_;	1436	my ($package, $model) = @$_;
1268	if (${"$package\::VERSION"} > 0) {	1437	if (${"$package\::VERSION"} > 0) {
1269	if (eval "require $model") {	1438	if (eval "require $model") {
		1439	AnyEvent::log 7 => "autodetected model '$model', using it.";
1270	$MODEL = $model;	1440	$MODEL = $model;
1271	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;
1272	last;	1441	last;
1273	}	1442	}
1274	}	1443	}
1275	}	1444	}
1276		1445
1277	unless ($MODEL) {	1446	unless ($MODEL) {
1278	# try to autoload a model	1447	# try to autoload a model
1279	for (@REGISTRY, @models) {	1448	for (@REGISTRY, @models) {
1280	my ($package, $model, $autoload) = @$_;	1449	my ($package, $model) = @$_;
1281	if (	1450	if (
1282	$autoload
1283	and eval "require $package"	1451	eval "require $package"
1284	and ${"$package\::VERSION"} > 0	1452	and ${"$package\::VERSION"} > 0
1285	and eval "require $model"	1453	and eval "require $model"
1286	) {	1454	) {
		1455	AnyEvent::log 7 => "autoloaded model '$model', using it.";
1287	$MODEL = $model;	1456	$MODEL = $model;
1288	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1289	last;	1457	last;
1290	}	1458	}
1291	}	1459	}
1292		1460
1293	$MODEL	1461	$MODEL
1294	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";	1462	or AnyEvent::log fatal => "AnyEvent: backend autodetection failed - did you properly install AnyEvent?";
1295	}	1463	}
1296	}	1464	}
1297		1465
1298	@models = (); # free probe data	1466	# free memory only needed for probing
		1467	undef @models;
		1468	undef @REGISTRY;
1299		1469
1300	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1470	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1301	unshift @ISA, $MODEL;
1302		1471
1303	# now nuke some methods that are overriden by the backend.	1472	# now nuke some methods that are overridden by the backend.
1304	# SUPER is not allowed.	1473	# SUPER usage is not allowed in these.
1305	for (qw(time signal child idle)) {	1474	for (qw(time signal child idle)) {
1306	undef &{"AnyEvent::Base::$_"}	1475	undef &{"AnyEvent::Base::$_"}
1307	if defined &{"$MODEL\::$_"};	1476	if defined &{"$MODEL\::$_"};
1308	}	1477	}
1309		1478
1310	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};	1479	_isa_set;
		1480
		1481	# we're officially open!
		1482
		1483	if ($ENV{PERL_ANYEVENT_STRICT}) {
		1484	require AnyEvent::Strict;
		1485	}
		1486
		1487	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1488	require AnyEvent::Debug;
		1489	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1490	}
		1491
		1492	if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1493	require AnyEvent::Socket;
		1494	require AnyEvent::Debug;
		1495
		1496	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1497	$shell =~ s/\$\$/$$/g;
		1498
		1499	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1500	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1501	}
		1502
		1503	# now the anyevent environment is set up as the user told us to, so
		1504	# call the actual user code - post detects
1311		1505
1312	(shift @post_detect)->() while @post_detect;	1506	(shift @post_detect)->() while @post_detect;
		1507	undef @post_detect;
1313		1508
1314	*post_detect = sub(&) {	1509	*post_detect = sub(&) {
1315	shift->();	1510	shift->();
1316		1511
1317	undef	1512	undef
1318	};	1513	};
1319		1514
1320	$MODEL	1515	$MODEL
1321	}	1516	}
1322		1517
1323	sub AUTOLOAD {	1518	for my $name (@methods) {
1324	(my $func = $AUTOLOAD) =~ s/.*://;	1519	*$name = sub {
1325
1326	$method{$func}
1327	or Carp::croak "$func: not a valid AnyEvent class method";
1328
1329	detect;	1520	detect;
1330		1521	# we use goto because
1331	my $class = shift;	1522	# a) it makes the thunk more transparent
1332	$class->$func (@_);	1523	# b) it allows us to delete the thunk later
		1524	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
		1525	};
1333	}	1526	}
1334		1527
1335	# utility function to dup a filehandle. this is used by many backends	1528	# utility function to dup a filehandle. this is used by many backends
1336	# to support binding more than one watcher per filehandle (they usually	1529	# 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).	1530	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1361		1554
1362	package AE;	1555	package AE;
1363		1556
1364	our $VERSION = $AnyEvent::VERSION;	1557	our $VERSION = $AnyEvent::VERSION;
1365		1558
		1559	sub _reset() {
		1560	eval q{
1366	# fall back to the main API by default - backends and AnyEvent::Base	1561	# fall back to the main API by default - backends and AnyEvent::Base
1367	# implementations can overwrite these.	1562	# implementations can overwrite these.
1368		1563
1369	sub io($$$) {	1564	sub io($$$) {
1370	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1565	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1371	}	1566	}
1372		1567
1373	sub timer($$$) {	1568	sub timer($$$) {
1374	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1569	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1375	}	1570	}
1376		1571
1377	sub signal($$) {	1572	sub signal($$) {
1378	AnyEvent->signal (signal => $_[0], cb => $_[1])	1573	AnyEvent->signal (signal => $_[0], cb => $_[1])
1379	}	1574	}
1380		1575
1381	sub child($$) {	1576	sub child($$) {
1382	AnyEvent->child (pid => $_[0], cb => $_[1])	1577	AnyEvent->child (pid => $_[0], cb => $_[1])
1383	}	1578	}
1384		1579
1385	sub idle($) {	1580	sub idle($) {
1386	AnyEvent->idle (cb => $_[0])	1581	AnyEvent->idle (cb => $_[0]);
1387	}	1582	}
1388		1583
1389	sub cv(;&) {	1584	sub cv(;&) {
1390	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1585	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1391	}	1586	}
1392		1587
1393	sub now() {	1588	sub now() {
1394	AnyEvent->now	1589	AnyEvent->now
1395	}	1590	}
1396		1591
1397	sub now_update() {	1592	sub now_update() {
1398	AnyEvent->now_update	1593	AnyEvent->now_update
1399	}	1594	}
1400		1595
1401	sub time() {	1596	sub time() {
1402	AnyEvent->time	1597	AnyEvent->time
		1598	}
		1599
		1600	*postpone = \&AnyEvent::postpone;
		1601	*log = \&AnyEvent::log;
		1602	};
		1603	die if $@;
1403	}	1604	}
		1605
		1606	BEGIN { _reset }
1404		1607
1405	package AnyEvent::Base;	1608	package AnyEvent::Base;
1406		1609
1407	# default implementations for many methods	1610	# default implementations for many methods
1408		1611
1409	sub time {	1612	sub time {
1410	eval q{ # poor man's autoloading {}	1613	eval q{ # poor man's autoloading {}
1411	# probe for availability of Time::HiRes	1614	# probe for availability of Time::HiRes
1412	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1615	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1413	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1616	*time = sub { Time::HiRes::time () };
1414	*AE::time = \&Time::HiRes::time;	1617	*AE::time = \& Time::HiRes::time ;
		1618	*now = \&time;
		1619	AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy.";
1415	# if (eval "use POSIX (); (POSIX::times())...	1620	# if (eval "use POSIX (); (POSIX::times())...
1416	} else {	1621	} else {
		1622	*time = sub { CORE::time };
		1623	*AE::time = sub (){ CORE::time };
		1624	*now = \&time;
1417	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1625	AnyEvent::log 3 => "using built-in time(), WARNING, no sub-second resolution!";
1418	*AE::time = sub (){ time }; # epic fail
1419	}	1626	}
1420
1421	*time = sub { AE::time }; # different prototypes
1422	};	1627	};
1423	die if $@;	1628	die if $@;
1424		1629
1425	&time	1630	&time
1426	}	1631	}
1427		1632
1428	*now = \&time;	1633	*now = \&time;
1429
1430	sub now_update { }	1634	sub now_update { }
1431		1635
		1636	sub _poll {
		1637	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
		1638	}
		1639
1432	# default implementation for ->condvar	1640	# default implementation for ->condvar
		1641	# in fact, the default should not be overwritten
1433		1642
1434	sub condvar {	1643	sub condvar {
1435	eval q{ # poor man's autoloading {}	1644	eval q{ # poor man's autoloading {}
1436	*condvar = sub {	1645	*condvar = sub {
1437	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1646	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
…		…
1515		1724
1516	sub signal {	1725	sub signal {
1517	eval q{ # poor man's autoloading {}	1726	eval q{ # poor man's autoloading {}
1518	# probe for availability of Async::Interrupt	1727	# probe for availability of Async::Interrupt
1519	if (_have_async_interrupt) {	1728	if (_have_async_interrupt) {
1520	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1729	AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling.";
1521		1730
1522	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1731	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1523	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1732	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1524		1733
1525	} else {	1734	} else {
1526	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1735	AnyEvent::log 8 => "using emulated perl signal handling with latency timer.";
1527		1736
1528	if (AnyEvent::WIN32) {	1737	if (AnyEvent::WIN32) {
1529	require AnyEvent::Util;	1738	require AnyEvent::Util;
1530		1739
1531	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1740	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1607	: sysread $SIGPIPE_R, (my $dummy), 9;	1816	: sysread $SIGPIPE_R, (my $dummy), 9;
1608		1817
1609	while (%SIG_EV) {	1818	while (%SIG_EV) {
1610	for (keys %SIG_EV) {	1819	for (keys %SIG_EV) {
1611	delete $SIG_EV{$_};	1820	delete $SIG_EV{$_};
1612	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1821	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1613	}	1822	}
1614	}	1823	}
1615	};	1824	};
1616	};	1825	};
1617	die if $@;	1826	die if $@;
…		…
1622	# default implementation for ->child	1831	# default implementation for ->child
1623		1832
1624	our %PID_CB;	1833	our %PID_CB;
1625	our $CHLD_W;	1834	our $CHLD_W;
1626	our $CHLD_DELAY_W;	1835	our $CHLD_DELAY_W;
1627	our $WNOHANG;
1628		1836
1629	# used by many Impl's	1837	# used by many Impl's
1630	sub _emit_childstatus($$) {	1838	sub _emit_childstatus($$) {
1631	my (undef, $rpid, $rstatus) = @_;	1839	my (undef, $rpid, $rstatus) = @_;
1632		1840
…		…
1639	eval q{ # poor man's autoloading {}	1847	eval q{ # poor man's autoloading {}
1640	*_sigchld = sub {	1848	*_sigchld = sub {
1641	my $pid;	1849	my $pid;
1642		1850
1643	AnyEvent->_emit_childstatus ($pid, $?)	1851	AnyEvent->_emit_childstatus ($pid, $?)
1644	while ($pid = waitpid -1, $WNOHANG) > 0;	1852	while ($pid = waitpid -1, WNOHANG) > 0;
1645	};	1853	};
1646		1854
1647	*child = sub {	1855	*child = sub {
1648	my (undef, %arg) = @_;	1856	my (undef, %arg) = @_;
1649		1857
1650	defined (my $pid = $arg{pid} + 0)	1858	my $pid = $arg{pid};
1651	or Carp::croak "required option 'pid' is missing";	1859	my $cb = $arg{cb};
1652		1860
1653	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1861	$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		1862
1660	unless ($CHLD_W) {	1863	unless ($CHLD_W) {
1661	$CHLD_W = AE::signal CHLD => \&_sigchld;	1864	$CHLD_W = AE::signal CHLD => \&_sigchld;
1662	# child could be a zombie already, so make at least one round	1865	# child could be a zombie already, so make at least one round
1663	&_sigchld;	1866	&_sigchld;
1664	}	1867	}
1665		1868
1666	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1869	bless [$pid, $cb+0], "AnyEvent::Base::child"
1667	};	1870	};
1668		1871
1669	*AnyEvent::Base::child::DESTROY = sub {	1872	*AnyEvent::Base::child::DESTROY = sub {
1670	my ($pid, $cb) = @{$_[0]};	1873	my ($pid, $icb) = @{$_[0]};
1671		1874
1672	delete $PID_CB{$pid}{$cb};	1875	delete $PID_CB{$pid}{$icb};
1673	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1876	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1674		1877
1675	undef $CHLD_W unless keys %PID_CB;	1878	undef $CHLD_W unless keys %PID_CB;
1676	};	1879	};
1677	};	1880	};
…		…
1690		1893
1691	my ($cb, $w, $rcb) = $arg{cb};	1894	my ($cb, $w, $rcb) = $arg{cb};
1692		1895
1693	$rcb = sub {	1896	$rcb = sub {
1694	if ($cb) {	1897	if ($cb) {
1695	$w = _time;	1898	$w = AE::time;
1696	&$cb;	1899	&$cb;
1697	$w = _time - $w;	1900	$w = AE::time - $w;
1698		1901
1699	# never use more then 50% of the time for the idle watcher,	1902	# never use more then 50% of the time for the idle watcher,
1700	# within some limits	1903	# within some limits
1701	$w = 0.0001 if $w < 0.0001;	1904	$w = 0.0001 if $w < 0.0001;
1702	$w = 5 if $w > 5;	1905	$w = 5 if $w > 5;
…		…
1725		1928
1726	package AnyEvent::CondVar;	1929	package AnyEvent::CondVar;
1727		1930
1728	our @ISA = AnyEvent::CondVar::Base::;	1931	our @ISA = AnyEvent::CondVar::Base::;
1729		1932
		1933	# only to be used for subclassing
		1934	sub new {
		1935	my $class = shift;
		1936	bless AnyEvent->condvar (@_), $class
		1937	}
		1938
1730	package AnyEvent::CondVar::Base;	1939	package AnyEvent::CondVar::Base;
1731		1940
1732	#use overload	1941	#use overload
1733	# '&{}' => sub { my $self = shift; sub { $self->send (@_) } },	1942	# '&{}' => sub { my $self = shift; sub { $self->send (@_) } },
1734	# fallback => 1;	1943	# fallback => 1;
…		…
1743		1952
1744	sub _send {	1953	sub _send {
1745	# nop	1954	# nop
1746	}	1955	}
1747		1956
		1957	sub _wait {
		1958	AnyEvent->_poll until $_[0]{_ae_sent};
		1959	}
		1960
1748	sub send {	1961	sub send {
1749	my $cv = shift;	1962	my $cv = shift;
1750	$cv->{_ae_sent} = [@_];	1963	$cv->{_ae_sent} = [@_];
1751	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};	1964	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1752	$cv->_send;	1965	$cv->_send;
…		…
1759		1972
1760	sub ready {	1973	sub ready {
1761	$_[0]{_ae_sent}	1974	$_[0]{_ae_sent}
1762	}	1975	}
1763		1976
1764	sub _wait {
1765	$WAITING
1766	and !$_[0]{_ae_sent}
1767	and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1768
1769	local $WAITING = 1;
1770	AnyEvent->one_event while !$_[0]{_ae_sent};
1771	}
1772
1773	sub recv {	1977	sub recv {
		1978	unless ($_[0]{_ae_sent}) {
		1979	$WAITING
		1980	and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
		1981
		1982	local $WAITING = 1;
1774	$_[0]->_wait;	1983	$_[0]->_wait;
		1984	}
1775		1985
1776	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1986	$_[0]{_ae_croak}
1777	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1987	and Carp::croak $_[0]{_ae_croak};
		1988
		1989	wantarray
		1990	? @{ $_[0]{_ae_sent} }
		1991	: $_[0]{_ae_sent}[0]
1778	}	1992	}
1779		1993
1780	sub cb {	1994	sub cb {
1781	my $cv = shift;	1995	my $cv = shift;
1782		1996
…		…
1798	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };	2012	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };
1799	}	2013	}
1800		2014
1801	# undocumented/compatibility with pre-3.4	2015	# undocumented/compatibility with pre-3.4
1802	*broadcast = \&send;	2016	*broadcast = \&send;
1803	*wait = \&_wait;	2017	*wait = \&recv;
1804		2018
1805	=head1 ERROR AND EXCEPTION HANDLING	2019	=head1 ERROR AND EXCEPTION HANDLING
1806		2020
1807	In general, AnyEvent does not do any error handling - it relies on the	2021	In general, AnyEvent does not do any error handling - it relies on the
1808	caller to do that if required. The L<AnyEvent::Strict> module (see also	2022	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
1820	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and	2034	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
1821	so on.	2035	so on.
1822		2036
1823	=head1 ENVIRONMENT VARIABLES	2037	=head1 ENVIRONMENT VARIABLES
1824		2038
1825	The following environment variables are used by this module or its	2039	AnyEvent supports a number of environment variables that tune the
1826	submodules.	2040	runtime behaviour. They are usually evaluated when AnyEvent is
		2041	loaded, initialised, or a submodule that uses them is loaded. Many of
		2042	them also cause AnyEvent to load additional modules - for example,
		2043	C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be
		2044	loaded.
1827		2045
1828	Note that AnyEvent will remove I<all> environment variables starting with	2046	All the environment variables documented here start with
1829	C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is	2047	C<PERL_ANYEVENT_>, which is what AnyEvent considers its own
1830	enabled.	2048	namespace. Other modules are encouraged (but by no means required) to use
		2049	C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule
		2050	namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could
		2051	be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env
		2052	variables starting with C<AE_>, see below).
		2053
		2054	All variables can also be set via the C<AE_> prefix, that is, instead
		2055	of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In
		2056	case there is a clash btween anyevent and another program that uses
		2057	C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something>
		2058	variable to the empty string, as those variables take precedence.
		2059
		2060	When AnyEvent is first loaded, it copies all C<AE_xxx> env variables
		2061	to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already
		2062	exists. If taint mode is on, then AnyEvent will remove I<all> environment
		2063	variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them
		2064	with C<undef> or the empty string, if the corresaponding C<AE_> variable
		2065	is set).
		2066
		2067	The exact algorithm is currently:
		2068
		2069	1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV
		2070	2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists
		2071	3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef.
		2072
		2073	This ensures that child processes will not see the C<AE_> variables.
		2074
		2075	The following environment variables are currently known to AnyEvent:
1831		2076
1832	=over 4	2077	=over 4
1833		2078
1834	=item C<PERL_ANYEVENT_VERBOSE>	2079	=item C<PERL_ANYEVENT_VERBOSE>
1835		2080
1836	By default, AnyEvent will be completely silent except in fatal	2081	By default, AnyEvent will only log messages with loglevel C<3>
1837	conditions. You can set this environment variable to make AnyEvent more	2082	(C<critical>) or higher (see L<AnyEvent::Log>). You can set this
		2083	environment variable to a numerical loglevel to make AnyEvent more (or
1838	talkative.	2084	less) talkative.
1839		2085
		2086	If you want to do more than just set the global logging level
		2087	you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
		2088	complex specifications.
		2089
		2090	When set to C<0> (C<off>), then no messages whatsoever will be logged with
		2091	the default logging settings.
		2092
1840	When set to C<1> or higher, causes AnyEvent to warn about unexpected	2093	When set to C<5> or higher (C<warn>), causes AnyEvent to warn about
1841	conditions, such as not being able to load the event model specified by	2094	unexpected conditions, such as not being able to load the event model
1842	C<PERL_ANYEVENT_MODEL>.	2095	specified by C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an
		2096	exception - this is the minimum recommended level.
1843		2097
1844	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	2098	When set to C<7> or higher (info), cause AnyEvent to report which event model it
1845	model it chooses.	2099	chooses.
1846		2100
1847	When set to C<8> or higher, then AnyEvent will report extra information on	2101	When set to C<8> or higher (debug), then AnyEvent will report extra information on
1848	which optional modules it loads and how it implements certain features.	2102	which optional modules it loads and how it implements certain features.
		2103
		2104	=item C<PERL_ANYEVENT_LOG>
		2105
		2106	Accepts rather complex logging specifications. For example, you could log
		2107	all C<debug> messages of some module to stderr, warnings and above to
		2108	stderr, and errors and above to syslog, with:
		2109
		2110	PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog
		2111
		2112	For the rather extensive details, see L<AnyEvent::Log>.
		2113
		2114	This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
		2115	so will take effect even before AnyEvent has initialised itself.
		2116
		2117	Note that specifying this environment variable causes the L<AnyEvent::Log>
		2118	module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
		2119	using the latter saves a few hundred kB of memory until the first message
		2120	is being logged.
1849		2121
1850	=item C<PERL_ANYEVENT_STRICT>	2122	=item C<PERL_ANYEVENT_STRICT>
1851		2123
1852	AnyEvent does not do much argument checking by default, as thorough	2124	AnyEvent does not do much argument checking by default, as thorough
1853	argument checking is very costly. Setting this variable to a true value	2125	argument checking is very costly. Setting this variable to a true value
…		…
1860	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>	2132	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>
1861	>>, it is definitely recommended to keep it off in production. Keeping	2133	>>, it is definitely recommended to keep it off in production. Keeping
1862	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2134	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1863	can be very useful, however.	2135	can be very useful, however.
1864		2136
		2137	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2138
		2139	If this env variable is nonempty, then its contents will be interpreted by
		2140	C<AnyEvent::Socket::parse_hostport> and C<AnyEvent::Debug::shell> (after
		2141	replacing every occurance of C<$$> by the process pid). The shell object
		2142	is saved in C<$AnyEvent::Debug::SHELL>.
		2143
		2144	This happens when the first watcher is created.
		2145
		2146	For example, to bind a debug shell on a unix domain socket in
		2147	F<< /tmp/debug<pid>.sock >>, you could use this:
		2148
		2149	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2150	# connect with e.g.: socat readline /tmp/debug123.sock
		2151
		2152	Or to bind to tcp port 4545 on localhost:
		2153
		2154	PERL_ANYEVENT_DEBUG_SHELL=127.0.0.1:4545 perlprog
		2155	# connect with e.g.: telnet localhost 4545
		2156
		2157	Note that creating sockets in F</tmp> or on localhost is very unsafe on
		2158	multiuser systems.
		2159
		2160	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2161
		2162	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2163	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2164
1865	=item C<PERL_ANYEVENT_MODEL>	2165	=item C<PERL_ANYEVENT_MODEL>
1866		2166
1867	This can be used to specify the event model to be used by AnyEvent, before	2167	This can be used to specify the event model to be used by AnyEvent, before
1868	auto detection and -probing kicks in. It must be a string consisting	2168	auto detection and -probing kicks in.
1869	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2169
		2170	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2171	or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1870	and the resulting module name is loaded and if the load was successful,	2172	resulting module name is loaded and - if the load was successful - used as
1871	used as event model. If it fails to load AnyEvent will proceed with	2173	event model backend. If it fails to load then AnyEvent will proceed with
1872	auto detection and -probing.	2174	auto detection and -probing.
1873		2175
1874	This functionality might change in future versions.	2176	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2177	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2178	the end of a string designates a module name and quotes it appropriately).
1875		2179
1876	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you	2180	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1877	could start your program like this:	2181	could start your program like this:
1878		2182
1879	PERL_ANYEVENT_MODEL=Perl perl ...	2183	PERL_ANYEVENT_MODEL=Perl perl ...
1880		2184
1881	=item C<PERL_ANYEVENT_PROTOCOLS>	2185	=item C<PERL_ANYEVENT_PROTOCOLS>
…		…
1897	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>	2201	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1898	- only support IPv4, never try to resolve or contact IPv6	2202	- only support IPv4, never try to resolve or contact IPv6
1899	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or	2203	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1900	IPv6, but prefer IPv6 over IPv4.	2204	IPv6, but prefer IPv6 over IPv4.
1901		2205
		2206	=item C<PERL_ANYEVENT_HOSTS>
		2207
		2208	This variable, if specified, overrides the F</etc/hosts> file used by
		2209	L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read
		2210	from that file instead.
		2211
1902	=item C<PERL_ANYEVENT_EDNS0>	2212	=item C<PERL_ANYEVENT_EDNS0>
1903		2213
1904	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension	2214	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension for
1905	for DNS. This extension is generally useful to reduce DNS traffic, but	2215	DNS. This extension is generally useful to reduce DNS traffic, especially
1906	some (broken) firewalls drop such DNS packets, which is why it is off by	2216	when DNSSEC is involved, but some (broken) firewalls drop such DNS
1907	default.	2217	packets, which is why it is off by default.
1908		2218
1909	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	2219	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1910	EDNS0 in its DNS requests.	2220	EDNS0 in its DNS requests.
1911		2221
1912	=item C<PERL_ANYEVENT_MAX_FORKS>	2222	=item C<PERL_ANYEVENT_MAX_FORKS>
…		…
1918		2228
1919	The default value for the C<max_outstanding> parameter for the default DNS	2229	The default value for the C<max_outstanding> parameter for the default DNS
1920	resolver - this is the maximum number of parallel DNS requests that are	2230	resolver - this is the maximum number of parallel DNS requests that are
1921	sent to the DNS server.	2231	sent to the DNS server.
1922		2232
		2233	=item C<PERL_ANYEVENT_MAX_SIGNAL_LATENCY>
		2234
		2235	Perl has inherently racy signal handling (you can basically choose between
		2236	losing signals and memory corruption) - pure perl event loops (including
		2237	C<AnyEvent::Loop>, when C<Async::Interrupt> isn't available) therefore
		2238	have to poll regularly to avoid losing signals.
		2239
		2240	Some event loops are racy, but don't poll regularly, and some event loops
		2241	are written in C but are still racy. For those event loops, AnyEvent
		2242	installs a timer that regularly wakes up the event loop.
		2243
		2244	By default, the interval for this timer is C<10> seconds, but you can
		2245	override this delay with this environment variable (or by setting
		2246	the C<$AnyEvent::MAX_SIGNAL_LATENCY> variable before creating signal
		2247	watchers).
		2248
		2249	Lower values increase CPU (and energy) usage, higher values can introduce
		2250	long delays when reaping children or waiting for signals.
		2251
		2252	The L<AnyEvent::Async> module, if available, will be used to avoid this
		2253	polling (with most event loops).
		2254
1923	=item C<PERL_ANYEVENT_RESOLV_CONF>	2255	=item C<PERL_ANYEVENT_RESOLV_CONF>
1924		2256
1925	The file to use instead of F</etc/resolv.conf> (or OS-specific	2257	The absolute path to a F<resolv.conf>-style file to use instead of
1926	configuration) in the default resolver. When set to the empty string, no	2258	F</etc/resolv.conf> (or the OS-specific configuration) in the default
1927	default config will be used.	2259	resolver, or the empty string to select the default configuration.
1928		2260
1929	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.	2261	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.
1930		2262
1931	When neither C<ca_file> nor C<ca_path> was specified during	2263	When neither C<ca_file> nor C<ca_path> was specified during
1932	L<AnyEvent::TLS> context creation, and either of these environment	2264	L<AnyEvent::TLS> context creation, and either of these environment
1933	variables exist, they will be used to specify CA certificate locations	2265	variables are nonempty, they will be used to specify CA certificate
1934	instead of a system-dependent default.	2266	locations instead of a system-dependent default.
1935		2267
1936	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>	2268	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>
1937		2269
1938	When these are set to C<1>, then the respective modules are not	2270	When these are set to C<1>, then the respective modules are not
1939	loaded. Mostly good for testing AnyEvent itself.	2271	loaded. Mostly good for testing AnyEvent itself.
…		…
2271	(even when used without AnyEvent), but most event loops have acceptable	2603	(even when used without AnyEvent), but most event loops have acceptable
2272	performance with or without AnyEvent.	2604	performance with or without AnyEvent.
2273		2605
2274	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2606	=item * The overhead AnyEvent adds is usually much smaller than the overhead of
2275	the actual event loop, only with extremely fast event loops such as EV	2607	the actual event loop, only with extremely fast event loops such as EV
2276	adds AnyEvent significant overhead.	2608	does AnyEvent add significant overhead.
2277		2609
2278	=item * You should avoid POE like the plague if you want performance or	2610	=item * You should avoid POE like the plague if you want performance or
2279	reasonable memory usage.	2611	reasonable memory usage.
2280		2612
2281	=back	2613	=back
…		…
2580		2912
2581	=item L<Time::HiRes>	2913	=item L<Time::HiRes>
2582		2914
2583	This module is part of perl since release 5.008. It will be used when the	2915	This module is part of perl since release 5.008. It will be used when the
2584	chosen event library does not come with a timing source of its own. The	2916	chosen event library does not come with a timing source of its own. The
2585	pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to	2917	pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2586	try to use a monotonic clock for timing stability.	2918	try to use a monotonic clock for timing stability.
2587		2919
2588	=back	2920	=back
2589		2921
2590		2922
…		…
2652	pronounced).	2984	pronounced).
2653		2985
2654		2986
2655	=head1 SEE ALSO	2987	=head1 SEE ALSO
2656		2988
2657	Utility functions: L<AnyEvent::Util>.	2989	Tutorial/Introduction: L<AnyEvent::Intro>.
2658		2990
2659	Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>,	2991	FAQ: L<AnyEvent::FAQ>.
2660	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2992
		2993	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		2994	(simply logging).
		2995
		2996	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
		2997	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		2998
		2999	Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>,
		3000	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		3001	L<Qt>, L<POE>, L<FLTK>.
2661		3002
2662	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	3003	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2663	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	3004	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2664	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	3005	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2665	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	3006	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		3007	L<AnyEvent::Impl::FLTK>.
2666		3008
2667	Non-blocking file handles, sockets, TCP clients and	3009	Non-blocking handles, pipes, stream sockets, TCP clients and
2668	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	3010	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2669		3011
2670	Asynchronous DNS: L<AnyEvent::DNS>.	3012	Asynchronous DNS: L<AnyEvent::DNS>.
2671		3013
2672	Coroutine support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>,	3014	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
2673	L<Coro::Event>,
2674		3015
2675	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::XMPP>,	3016	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,
2676	L<AnyEvent::HTTP>.	3017	L<AnyEvent::HTTP>.
2677		3018
2678		3019
2679	=head1 AUTHOR	3020	=head1 AUTHOR
2680		3021

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.332 by root, Tue Aug 31 23:32:40 2010 UTC vs. Revision 1.388 by root, Sun Oct 2 01:22:01 2011 UTC

Diff Legend

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.332 by root, Tue Aug 31 23:32:40 2010 UTC vs.
Revision 1.388 by root, Sun Oct 2 01:22:01 2011 UTC