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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.340 by root, Fri Dec 3 18:39:06 2010 UTC vs.
Revision 1.407 by root, Thu Nov 15 01:25:05 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
85	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
86	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.
87		87
88	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works	88	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works
89	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
90	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
91	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
92	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
93	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
94	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,
95	to AnyEvent, too, so it is future-proof).	95	so it is future-proof).
96		96
97	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
98	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
99	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
100	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
…		…
121	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>
122	module.	122	module.
123		123
124	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
125	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
126	following modules is already loaded: L<EV>, L<AnyEvent::Impl::Perl>,	126	following modules is already loaded: L<EV>, L<AnyEvent::Loop>,
127	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
128	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
129	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
130	available, the pure-perl L<AnyEvent::Impl::Perl> should always work, so	130	available, the pure-perl L<AnyEvent::Loop> should always work, so
131	the other two are not normally tried.	131	the other two are not normally tried.
132		132
133	Because AnyEvent first checks for modules that are already loaded, loading	133	Because AnyEvent first checks for modules that are already loaded, loading
134	an event model explicitly before first using AnyEvent will likely make	134	an event model explicitly before first using AnyEvent will likely make
135	that model the default. For example:	135	that model the default. For example:
…		…
142	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
143	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,
144	as very few modules hardcode event loops without announcing this very	144	as very few modules hardcode event loops without announcing this very
145	loudly.	145	loudly.
146		146
147	The pure-perl implementation of AnyEvent is called	147	The pure-perl implementation of AnyEvent is called C<AnyEvent::Loop>. Like
148	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
149	explicitly and enjoy the high availability of that event loop :)	149	availability of that event loop :)
150		150
151	=head1 WATCHERS	151	=head1 WATCHERS
152		152
153	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
154	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
…		…
356	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into	356	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into
357	account.	357	account.
358		358
359	=item AnyEvent->now_update	359	=item AnyEvent->now_update
360		360
361	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
362	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 >>,
363	AnyEvent->now >>, above).	363	above).
364		364
365	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
366	this "current" time will differ substantially from the real time, which	366	this "current" time will differ substantially from the real time, which
367	might affect timers and time-outs.	367	might affect timers and time-outs.
368		368
…		…
415	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's	415	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's
416	pure perl implementation).	416	pure perl implementation).
417		417
418	=head3 Safe/Unsafe Signals	418	=head3 Safe/Unsafe Signals
419		419
420	Perl signals can be either "safe" (synchronous to opcode handling) or	420	Perl signals can be either "safe" (synchronous to opcode handling)
421	"unsafe" (asynchronous) - the former might get delayed indefinitely, the	421	or "unsafe" (asynchronous) - the former might delay signal delivery
422	latter might corrupt your memory.	422	indefinitely, the latter might corrupt your memory.
423		423
424	AnyEvent signal handlers are, in addition, synchronous to the event loop,	424	AnyEvent signal handlers are, in addition, synchronous to the event loop,
425	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
426	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.
427	callbacks, too).	427	callbacks, too).
428		428
429	=head3 Signal Races, Delays and Workarounds	429	=head3 Signal Races, Delays and Workarounds
430		430
431	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
432	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,
433	do race-free signal handling in perl, requiring C libraries for	433	as you cannot do race-free signal handling in perl, requiring
434	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
435	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
436	specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This	436	a signal might be delayed is 10 seconds by default, but can
437	variable can be changed only before the first signal watcher is created,	437	be overriden via C<$ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY}> or
438	and should be left alone otherwise. This variable determines how often	438	C<$AnyEvent::MAX_SIGNAL_LATENCY> - see the L<ENVIRONMENT VARIABLES>
439	AnyEvent polls for signals (in case a wake-up was missed). Higher values	439	section for details.
440	will cause fewer spurious wake-ups, which is better for power and CPU
441	saving.
442		440
443	All these problems can be avoided by installing the optional	441	All these problems can be avoided by installing the optional
444	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
445	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>
446	(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
447	one-second latency). For those, you just have to suffer the delays.	445	delays.
448		446
449	=head2 CHILD PROCESS WATCHERS	447	=head2 CHILD PROCESS WATCHERS
450		448
451	$w = AnyEvent->child (pid => <process id>, cb => <callback>);	449	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
452		450
…		…
482	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
483	watcher before you C<fork> the child (alternatively, you can call	481	watcher before you C<fork> the child (alternatively, you can call
484	C<AnyEvent::detect>).	482	C<AnyEvent::detect>).
485		483
486	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
487	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
488	mentioned in the description of signal watchers apply.	486	problems mentioned in the description of signal watchers apply.
489		487
490	Example: fork a process and wait for it	488	Example: fork a process and wait for it
491		489
492	my $done = AnyEvent->condvar;	490	my $done = AnyEvent->condvar;
493		491
…		…
860	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
861	pure-perl implementation, which is available everywhere as it comes with	859	pure-perl implementation, which is available everywhere as it comes with
862	AnyEvent itself.	860	AnyEvent itself.
863		861
864	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	862	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
865	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	863	AnyEvent::Impl::Perl pure-perl AnyEvent::Loop, fast and portable.
866		864
867	=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.
868		866
869	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
870	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
…		…
876	AnyEvent::Impl::Glib based on Glib, slow but very stable.	874	AnyEvent::Impl::Glib based on Glib, slow but very stable.
877	AnyEvent::Impl::Tk based on Tk, very broken.	875	AnyEvent::Impl::Tk based on Tk, very broken.
878	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	876	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
879	AnyEvent::Impl::POE based on POE, very slow, some limitations.	877	AnyEvent::Impl::POE based on POE, very slow, some limitations.
880	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).
881		882
882	=item Backends with special needs.	883	=item Backends with special needs.
883		884
884	Qt requires the Qt::Application to be instantiated first, but will	885	Qt requires the Qt::Application to be instantiated first, but will
885	otherwise be picked up automatically. As long as the main program	886	otherwise be picked up automatically. As long as the main program
886	instantiates the application before any AnyEvent watchers are created,	887	instantiates the application before any AnyEvent watchers are created,
887	everything should just work.	888	everything should just work.
888		889
889	AnyEvent::Impl::Qt based on Qt.	890	AnyEvent::Impl::Qt based on Qt.
890
891	Support for IO::Async can only be partial, as it is too broken and
892	architecturally limited to even support the AnyEvent API. It also
893	is the only event loop that needs the loop to be set explicitly, so
894	it can only be used by a main program knowing about AnyEvent. See
895	L<AnyEvent::Impl::IOAsync> for the gory details.
896
897	AnyEvent::Impl::IOAsync based on IO::Async, cannot be autoprobed.
898		891
899	=item Event loops that are indirectly supported via other backends.	892	=item Event loops that are indirectly supported via other backends.
900		893
901	Some event loops can be supported via other modules:	894	Some event loops can be supported via other modules:
902		895
…		…
938		931
939	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model	932	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model
940	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
941	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
942	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).
943		940
944	If you need to do some initialisation before AnyEvent watchers are	941	If you need to do some initialisation before AnyEvent watchers are
945	created, use C<post_detect>.	942	created, use C<post_detect>.
946		943
947	=item $guard = AnyEvent::post_detect { BLOCK }	944	=item $guard = AnyEvent::post_detect { BLOCK }
…		…
1010	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent	1007	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1011	# as soon as it is	1008	# as soon as it is
1012	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };	1009	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1013	}	1010	}
1014		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
1015	=back	1070	=back
1016		1071
1017	=head1 WHAT TO DO IN A MODULE	1072	=head1 WHAT TO DO IN A MODULE
1018		1073
1019	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
…		…
1052	modules might create watchers when they are loaded, and AnyEvent will	1107	modules might create watchers when they are loaded, and AnyEvent will
1053	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
1054	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.
1055		1110
1056	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
1057	C<AnyEvent::Impl::Perl> module, which gives you similar behaviour	1112	C<AnyEvent::Loop> module, which gives you similar behaviour
1058	everywhere, but letting AnyEvent chose the model is generally better.	1113	everywhere, but letting AnyEvent chose the model is generally better.
1059		1114
1060	=head2 MAINLOOP EMULATION	1115	=head2 MAINLOOP EMULATION
1061		1116
1062	Sometimes (often for short test scripts, or even standalone programs who	1117	Sometimes (often for short test scripts, or even standalone programs who
…		…
1075		1130
1076		1131
1077	=head1 OTHER MODULES	1132	=head1 OTHER MODULES
1078		1133
1079	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
1080	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
1081	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
1082	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 :)
1083		1141
1084	=over 4	1142	=over 4
1085		1143
1086	=item L<AnyEvent::Util>	1144	=item L<AnyEvent::Util>
1087		1145
…		…
1107	=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>
1108		1166
1109	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
1110	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
1111	Client Protocol).	1169	Client Protocol).
1112
1113	=item L<AnyEvent::Handle::UDP>
1114
1115	Here be danger!
1116
1117	As Pauli would put it, "Not only is it not right, it's not even wrong!" -
1118	there are so many things wrong with AnyEvent::Handle::UDP, most notably
1119	its use of a stream-based API with a protocol that isn't streamable, that
1120	the only way to improve it is to delete it.
1121
1122	It features data corruption (but typically only under load) and general
1123	confusion. On top, the author is not only clueless about UDP but also
1124	fact-resistant - some gems of his understanding: "connect doesn't work
1125	with UDP", "UDP packets are not IP packets", "UDP only has datagrams, not
1126	packets", "I don't need to implement proper error checking as UDP doesn't
1127	support error checking" and so on - he doesn't even understand what's
1128	wrong with his module when it is explained to him.
1129
1130	=item L<AnyEvent::DBI>
1131
1132	Executes L<DBI> requests asynchronously in a proxy process for you,
1133	notifying you in an event-based way when the operation is finished.
1134		1170
1135	=item L<AnyEvent::AIO>	1171	=item L<AnyEvent::AIO>
1136		1172
1137	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
1138	toolbox of every event programmer. AnyEvent::AIO transparently fuses	1174	toolbox of every event programmer. AnyEvent::AIO transparently fuses
1139	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
1140	file I/O, and much more.	1176	file I/O, and much more.
1141		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
1142	=item L<AnyEvent::HTTPD>	1196	=item L<AnyEvent::HTTPD>
1143		1197
1144	A simple embedded webserver.	1198	A simple embedded webserver.
1145		1199
1146	=item L<AnyEvent::FastPing>	1200	=item L<AnyEvent::FastPing>
1147		1201
1148	The fastest ping in the west.	1202	The fastest ping in the west.
1149		1203
1150	=item L<Coro>	1204	=item L<Coro>
1151		1205
1152	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	};
1153		1219
1154	=back	1220	=back
1155		1221
1156	=cut	1222	=cut
1157		1223
1158	package AnyEvent;	1224	package AnyEvent;
1159		1225
1160	# basically a tuned-down version of common::sense	1226	# basically a tuned-down version of common::sense
1161	sub common_sense {	1227	sub common_sense {
1162	# from common:.sense 3.3	1228	# from common:.sense 3.5
		1229	local $^W;
1163	${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf3\x0f\xc0\xf0\xfc\x33\x00";	1230	${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf0\x0f\xc0\xf0\xfc\x33\x00";
1164	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)	1231	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1165	$^H \|= 0x00000600;	1232	$^H \|= 0x00000600;
1166	}	1233	}
1167		1234
1168	BEGIN { AnyEvent::common_sense }	1235	BEGIN { AnyEvent::common_sense }
1169		1236
1170	use Carp ();	1237	use Carp ();
1171		1238
1172	our $VERSION = '5.29';	1239	our $VERSION = '7.04';
1173	our $MODEL;	1240	our $MODEL;
1174
1175	our $AUTOLOAD;
1176	our @ISA;	1241	our @ISA;
1177
1178	our @REGISTRY;	1242	our @REGISTRY;
1179
1180	our $VERBOSE;	1243	our $VERBOSE;
		1244	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
		1245	our $MAX_SIGNAL_LATENCY = $ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY} \|\| 10; # executes after the BEGIN block below (tainting!)
1181		1246
1182	BEGIN {	1247	BEGIN {
1183	require "AnyEvent/constants.pl";	1248	require "AnyEvent/constants.pl";
1184		1249
1185	eval "sub TAINT (){" . (${^TAINT}*1) . "}";	1250	eval "sub TAINT (){" . (${^TAINT}*1) . "}";
1186		1251
1187	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1252	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1188	if ${^TAINT};	1253	if ${^TAINT};
1189		1254
1190	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1255	$ENV{"PERL_ANYEVENT_$_"} = $ENV{"AE_$_"}
		1256	for grep s/^AE_// && !exists $ENV{"PERL_ANYEVENT_$_"}, keys %ENV;
1191		1257
1192	}	1258	@ENV{grep /^PERL_ANYEVENT_/, keys %ENV} = ()
		1259	if ${^TAINT};
1193		1260
1194	our $MAX_SIGNAL_LATENCY = 10;	1261	# $ENV{PERL_ANYEVENT_xxx} now valid
1195		1262
1196	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred	1263	$VERBOSE = length $ENV{PERL_ANYEVENT_VERBOSE} ? $ENV{PERL_ANYEVENT_VERBOSE}*1 : 4;
1197		1264
1198	{
1199	my $idx;	1265	my $idx;
1200	$PROTOCOL{$_} = ++$idx	1266	$PROTOCOL{$_} = ++$idx
1201	for reverse split /\s,\s/,	1267	for reverse split /\s,\s/,
1202	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1268	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1203	}	1269	}
1204		1270
		1271	our @post_detect;
		1272
		1273	sub post_detect(&) {
		1274	my ($cb) = @_;
		1275
		1276	push @post_detect, $cb;
		1277
		1278	defined wantarray
		1279	? bless \$cb, "AnyEvent::Util::postdetect"
		1280	: ()
		1281	}
		1282
		1283	sub AnyEvent::Util::postdetect::DESTROY {
		1284	@post_detect = grep $_ != ${$_[0]}, @post_detect;
		1285	}
		1286
		1287	our $POSTPONE_W;
		1288	our @POSTPONE;
		1289
		1290	sub _postpone_exec {
		1291	undef $POSTPONE_W;
		1292
		1293	&{ shift @POSTPONE }
		1294	while @POSTPONE;
		1295	}
		1296
		1297	sub postpone(&) {
		1298	push @POSTPONE, shift;
		1299
		1300	$POSTPONE_W \|\|= AE::timer (0, 0, \&_postpone_exec);
		1301
		1302	()
		1303	}
		1304
		1305	sub log($$;@) {
		1306	# only load the big bloated module when we actually are about to log something
		1307	if ($_[0] <= ($VERBOSE \|\| 1)) { # also catches non-numeric levels(!) and fatal
		1308	local ($!, $@);
		1309	require AnyEvent::Log; # among other things, sets $VERBOSE to 9
		1310	# AnyEvent::Log overwrites this function
		1311	goto &log;
		1312	}
		1313
		1314	0 # not logged
		1315	}
		1316
		1317	sub _logger($;$) {
		1318	my ($level, $renabled) = @_;
		1319
		1320	$$renabled = $level <= $VERBOSE;
		1321
		1322	my $logger = [(caller)[0], $level, $renabled];
		1323
		1324	$AnyEvent::Log::LOGGER{$logger+0} = $logger;
		1325
		1326	# return unless defined wantarray;
		1327	#
		1328	# require AnyEvent::Util;
		1329	# my $guard = AnyEvent::Util::guard (sub {
		1330	# # "clean up"
		1331	# delete $LOGGER{$logger+0};
		1332	# });
		1333	#
		1334	# sub {
		1335	# return 0 unless $$renabled;
		1336	#
		1337	# $guard if 0; # keep guard alive, but don't cause runtime overhead
		1338	# require AnyEvent::Log unless $AnyEvent::Log::VERSION;
		1339	# package AnyEvent::Log;
		1340	# _log ($logger->[0], $level, @_) # logger->[0] has been converted at load time
		1341	# }
		1342	}
		1343
		1344	if (length $ENV{PERL_ANYEVENT_LOG}) {
		1345	require AnyEvent::Log; # AnyEvent::Log does the thing for us
		1346	}
		1347
1205	my @models = (	1348	our @models = (
1206	[EV:: => AnyEvent::Impl::EV:: , 1],	1349	[EV:: => AnyEvent::Impl::EV::],
1207	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1350	[AnyEvent::Loop:: => AnyEvent::Impl::Perl::],
1208	# everything below here will not (normally) be autoprobed	1351	# everything below here will not (normally) be autoprobed
1209	# as the pureperl backend should work everywhere	1352	# as the pure perl backend should work everywhere
1210	# and is usually faster	1353	# and is usually faster
		1354	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package, so msut be near the top
1211	[Event:: => AnyEvent::Impl::Event::, 1],	1355	[Event:: => AnyEvent::Impl::Event::], # slow, stable
1212	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1356	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers
		1357	# everything below here should not be autoloaded
1213	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1358	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1214	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1215	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1359	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1216	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1360	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1217	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1361	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1218	[Wx:: => AnyEvent::Impl::POE::],	1362	[Wx:: => AnyEvent::Impl::POE::],
1219	[Prima:: => AnyEvent::Impl::POE::],	1363	[Prima:: => AnyEvent::Impl::POE::],
1220	# IO::Async is just too broken - we would need workarounds for its	1364	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1221	# byzantine signal and broken child handling, among others.	1365	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1222	# IO::Async is rather hard to detect, as it doesn't have any	1366	[FLTK:: => AnyEvent::Impl::FLTK::],
1223	# obvious default class.
1224	[IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1225	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1226	[IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
1227	[AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
1228	);	1367	);
1229		1368
1230	our %method = map +($_ => 1),	1369	our @isa_hook;
		1370
		1371	sub _isa_set {
		1372	my @pkg = ("AnyEvent", (map $_->[0], grep defined, @isa_hook), $MODEL);
		1373
		1374	@{"$pkg[$_-1]::ISA"} = $pkg[$_]
		1375	for 1 .. $#pkg;
		1376
		1377	grep $_ && $_->[1], @isa_hook
		1378	and AE::_reset ();
		1379	}
		1380
		1381	# used for hooking AnyEvent::Strict and AnyEvent::Debug::Wrap into the class hierarchy
		1382	sub _isa_hook($$;$) {
		1383	my ($i, $pkg, $reset_ae) = @_;
		1384
		1385	$isa_hook[$i] = $pkg ? [$pkg, $reset_ae] : undef;
		1386
		1387	_isa_set;
		1388	}
		1389
		1390	# all autoloaded methods reserve the complete glob, not just the method slot.
		1391	# due to bugs in perls method cache implementation.
1231	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1392	our @methods = qw(io timer time now now_update signal child idle condvar);
1232
1233	our @post_detect;
1234
1235	sub post_detect(&) {
1236	my ($cb) = @_;
1237
1238	push @post_detect, $cb;
1239
1240	defined wantarray
1241	? bless \$cb, "AnyEvent::Util::postdetect"
1242	: ()
1243	}
1244
1245	sub AnyEvent::Util::postdetect::DESTROY {
1246	@post_detect = grep $_ != ${$_[0]}, @post_detect;
1247	}
1248		1393
1249	sub detect() {	1394	sub detect() {
		1395	return $MODEL if $MODEL; # some programs keep references to detect
		1396
		1397	# IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it
		1398	# the author knows about the problems and what it does to AnyEvent as a whole
		1399	# (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent
		1400	# anyway.
		1401	AnyEvent::log fatal => "IO::Async::Loop::AnyEvent detected - that module is broken by\n"
		1402	. "design, abuses internals and breaks AnyEvent - will not continue."
		1403	if exists $INC{"IO/Async/Loop/AnyEvent.pm"};
		1404
		1405	local $!; # for good measure
		1406	local $SIG{__DIE__}; # we use eval
		1407
1250	# free some memory	1408	# free some memory
1251	*detect = sub () { $MODEL };	1409	*detect = sub () { $MODEL };
		1410	# undef &func doesn't correctly update the method cache. grmbl.
		1411	# so we delete the whole glob. grmbl.
		1412	# otoh, perl doesn't let me undef an active usb, but it lets me free
		1413	# a glob with an active sub. hrm. i hope it works, but perl is
		1414	# usually buggy in this department. sigh.
		1415	delete @{"AnyEvent::"}{@methods};
		1416	undef @methods;
1252		1417
1253	local $!; # for good measure
1254	local $SIG{__DIE__};
1255
1256	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1418	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1257	my $model = "AnyEvent::Impl::$1";	1419	my $model = $1;
		1420	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1258	if (eval "require $model") {	1421	if (eval "require $model") {
		1422	AnyEvent::log 7 => "Loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1259	$MODEL = $model;	1423	$MODEL = $model;
1260	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1261	} else {	1424	} else {
1262	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1425	AnyEvent::log 4 => "Unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1263	}	1426	}
1264	}	1427	}
1265		1428
1266	# check for already loaded models	1429	# check for already loaded models
1267	unless ($MODEL) {	1430	unless ($MODEL) {
1268	for (@REGISTRY, @models) {	1431	for (@REGISTRY, @models) {
1269	my ($package, $model) = @$_;	1432	my ($package, $model) = @$_;
1270	if (${"$package\::VERSION"} > 0) {	1433	if (${"$package\::VERSION"} > 0) {
1271	if (eval "require $model") {	1434	if (eval "require $model") {
		1435	AnyEvent::log 7 => "Autodetected model '$model', using it.";
1272	$MODEL = $model;	1436	$MODEL = $model;
1273	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;	1437	last;
		1438	} else {
		1439	AnyEvent::log 8 => "Detected event loop $package, but cannot load '$model', skipping: $@";
		1440	}
		1441	}
		1442	}
		1443
		1444	unless ($MODEL) {
		1445	# try to autoload a model
		1446	for (@REGISTRY, @models) {
		1447	my ($package, $model) = @$_;
		1448	if (
		1449	eval "require $package"
		1450	and ${"$package\::VERSION"} > 0
		1451	and eval "require $model"
		1452	) {
		1453	AnyEvent::log 7 => "Autoloaded model '$model', using it.";
		1454	$MODEL = $model;
1274	last;	1455	last;
1275	}	1456	}
1276	}	1457	}
1277	}
1278
1279	unless ($MODEL) {
1280	# try to autoload a model
1281	for (@REGISTRY, @models) {
1282	my ($package, $model, $autoload) = @$_;
1283	if (
1284	$autoload
1285	and eval "require $package"
1286	and ${"$package\::VERSION"} > 0
1287	and eval "require $model"
1288	) {
1289	$MODEL = $model;
1290	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1291	last;
1292	}
1293	}
1294		1458
1295	$MODEL	1459	$MODEL
1296	or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";	1460	or AnyEvent::log fatal => "Backend autodetection failed - did you properly install AnyEvent?";
1297	}	1461	}
1298	}	1462	}
1299		1463
1300	@models = (); # free probe data	1464	# free memory only needed for probing
		1465	undef @models;
		1466	undef @REGISTRY;
1301		1467
1302	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1468	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1303	unshift @ISA, $MODEL;
1304		1469
1305	# now nuke some methods that are overridden by the backend.	1470	# now nuke some methods that are overridden by the backend.
1306	# SUPER is not allowed.	1471	# SUPER usage is not allowed in these.
1307	for (qw(time signal child idle)) {	1472	for (qw(time signal child idle)) {
1308	undef &{"AnyEvent::Base::$_"}	1473	undef &{"AnyEvent::Base::$_"}
1309	if defined &{"$MODEL\::$_"};	1474	if defined &{"$MODEL\::$_"};
1310	}	1475	}
1311		1476
		1477	_isa_set;
		1478
		1479	# we're officially open!
		1480
1312	if ($ENV{PERL_ANYEVENT_STRICT}) {	1481	if ($ENV{PERL_ANYEVENT_STRICT}) {
1313	eval { require AnyEvent::Strict };	1482	require AnyEvent::Strict;
1314	warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1315	if $@ && $VERBOSE;
1316	}	1483	}
1317		1484
		1485	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1486	require AnyEvent::Debug;
		1487	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1488	}
		1489
		1490	if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1491	require AnyEvent::Socket;
		1492	require AnyEvent::Debug;
		1493
		1494	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1495	$shell =~ s/\$\$/$$/g;
		1496
		1497	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1498	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1499	}
		1500
		1501	# now the anyevent environment is set up as the user told us to, so
		1502	# call the actual user code - post detects
		1503
1318	(shift @post_detect)->() while @post_detect;	1504	(shift @post_detect)->() while @post_detect;
		1505	undef @post_detect;
1319		1506
1320	*post_detect = sub(&) {	1507	*post_detect = sub(&) {
1321	shift->();	1508	shift->();
1322		1509
1323	undef	1510	undef
1324	};	1511	};
1325		1512
1326	$MODEL	1513	$MODEL
1327	}	1514	}
1328		1515
1329	sub AUTOLOAD {	1516	for my $name (@methods) {
1330	(my $func = $AUTOLOAD) =~ s/.*://;	1517	*$name = sub {
1331
1332	$method{$func}
1333	or Carp::croak "$func: not a valid AnyEvent class method";
1334
1335	detect;	1518	detect;
1336		1519	# we use goto because
1337	my $class = shift;	1520	# a) it makes the thunk more transparent
1338	$class->$func (@_);	1521	# b) it allows us to delete the thunk later
		1522	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
		1523	};
1339	}	1524	}
1340		1525
1341	# utility function to dup a filehandle. this is used by many backends	1526	# utility function to dup a filehandle. this is used by many backends
1342	# to support binding more than one watcher per filehandle (they usually	1527	# to support binding more than one watcher per filehandle (they usually
1343	# allow only one watcher per fd, so we dup it to get a different one).	1528	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1367		1552
1368	package AE;	1553	package AE;
1369		1554
1370	our $VERSION = $AnyEvent::VERSION;	1555	our $VERSION = $AnyEvent::VERSION;
1371		1556
		1557	sub _reset() {
		1558	eval q{
1372	# fall back to the main API by default - backends and AnyEvent::Base	1559	# fall back to the main API by default - backends and AnyEvent::Base
1373	# implementations can overwrite these.	1560	# implementations can overwrite these.
1374		1561
1375	sub io($$$) {	1562	sub io($$$) {
1376	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1563	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1377	}	1564	}
1378		1565
1379	sub timer($$$) {	1566	sub timer($$$) {
1380	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1567	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1381	}	1568	}
1382		1569
1383	sub signal($$) {	1570	sub signal($$) {
1384	AnyEvent->signal (signal => $_[0], cb => $_[1])	1571	AnyEvent->signal (signal => $_[0], cb => $_[1])
1385	}	1572	}
1386		1573
1387	sub child($$) {	1574	sub child($$) {
1388	AnyEvent->child (pid => $_[0], cb => $_[1])	1575	AnyEvent->child (pid => $_[0], cb => $_[1])
1389	}	1576	}
1390		1577
1391	sub idle($) {	1578	sub idle($) {
1392	AnyEvent->idle (cb => $_[0])	1579	AnyEvent->idle (cb => $_[0]);
1393	}	1580	}
1394		1581
1395	sub cv(;&) {	1582	sub cv(;&) {
1396	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1583	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1397	}	1584	}
1398		1585
1399	sub now() {	1586	sub now() {
1400	AnyEvent->now	1587	AnyEvent->now
1401	}	1588	}
1402		1589
1403	sub now_update() {	1590	sub now_update() {
1404	AnyEvent->now_update	1591	AnyEvent->now_update
1405	}	1592	}
1406		1593
1407	sub time() {	1594	sub time() {
1408	AnyEvent->time	1595	AnyEvent->time
		1596	}
		1597
		1598	*postpone = \&AnyEvent::postpone;
		1599	*log = \&AnyEvent::log;
		1600	};
		1601	die if $@;
1409	}	1602	}
		1603
		1604	BEGIN { _reset }
1410		1605
1411	package AnyEvent::Base;	1606	package AnyEvent::Base;
1412		1607
1413	# default implementations for many methods	1608	# default implementations for many methods
1414		1609
1415	sub time {	1610	sub time {
1416	eval q{ # poor man's autoloading {}	1611	eval q{ # poor man's autoloading {}
1417	# probe for availability of Time::HiRes	1612	# probe for availability of Time::HiRes
1418	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1613	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1419	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1614	*time = sub { Time::HiRes::time () };
1420	*AE::time = \&Time::HiRes::time;	1615	*AE::time = \& Time::HiRes::time ;
		1616	*now = \&time;
		1617	AnyEvent::log 8 => "using Time::HiRes for sub-second timing accuracy.";
1421	# if (eval "use POSIX (); (POSIX::times())...	1618	# if (eval "use POSIX (); (POSIX::times())...
1422	} else {	1619	} else {
1423	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1620	*time = sub { CORE::time };
1424	*AE::time = sub (){ time }; # epic fail	1621	*AE::time = sub (){ CORE::time };
		1622	*now = \&time;
		1623	AnyEvent::log 3 => "Using built-in time(), no sub-second resolution!";
1425	}	1624	}
1426
1427	*time = sub { AE::time }; # different prototypes
1428	};	1625	};
1429	die if $@;	1626	die if $@;
1430		1627
1431	&time	1628	&time
1432	}	1629	}
1433		1630
1434	*now = \&time;	1631	*now = \&time;
1435
1436	sub now_update { }	1632	sub now_update { }
1437		1633
		1634	sub _poll {
		1635	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
		1636	}
		1637
1438	# default implementation for ->condvar	1638	# default implementation for ->condvar
		1639	# in fact, the default should not be overwritten
1439		1640
1440	sub condvar {	1641	sub condvar {
1441	eval q{ # poor man's autoloading {}	1642	eval q{ # poor man's autoloading {}
1442	*condvar = sub {	1643	*condvar = sub {
1443	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1644	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
…		…
1521		1722
1522	sub signal {	1723	sub signal {
1523	eval q{ # poor man's autoloading {}	1724	eval q{ # poor man's autoloading {}
1524	# probe for availability of Async::Interrupt	1725	# probe for availability of Async::Interrupt
1525	if (_have_async_interrupt) {	1726	if (_have_async_interrupt) {
1526	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1727	AnyEvent::log 8 => "Using Async::Interrupt for race-free signal handling.";
1527		1728
1528	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1729	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1529	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1730	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1530		1731
1531	} else {	1732	} else {
1532	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1733	AnyEvent::log 8 => "Using emulated perl signal handling with latency timer.";
1533		1734
1534	if (AnyEvent::WIN32) {	1735	if (AnyEvent::WIN32) {
1535	require AnyEvent::Util;	1736	require AnyEvent::Util;
1536		1737
1537	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1738	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1613	: sysread $SIGPIPE_R, (my $dummy), 9;	1814	: sysread $SIGPIPE_R, (my $dummy), 9;
1614		1815
1615	while (%SIG_EV) {	1816	while (%SIG_EV) {
1616	for (keys %SIG_EV) {	1817	for (keys %SIG_EV) {
1617	delete $SIG_EV{$_};	1818	delete $SIG_EV{$_};
1618	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1819	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1619	}	1820	}
1620	}	1821	}
1621	};	1822	};
1622	};	1823	};
1623	die if $@;	1824	die if $@;
…		…
1628	# default implementation for ->child	1829	# default implementation for ->child
1629		1830
1630	our %PID_CB;	1831	our %PID_CB;
1631	our $CHLD_W;	1832	our $CHLD_W;
1632	our $CHLD_DELAY_W;	1833	our $CHLD_DELAY_W;
1633	our $WNOHANG;
1634		1834
1635	# used by many Impl's	1835	# used by many Impl's
1636	sub _emit_childstatus($$) {	1836	sub _emit_childstatus($$) {
1637	my (undef, $rpid, $rstatus) = @_;	1837	my (undef, $rpid, $rstatus) = @_;
1638		1838
…		…
1645	eval q{ # poor man's autoloading {}	1845	eval q{ # poor man's autoloading {}
1646	*_sigchld = sub {	1846	*_sigchld = sub {
1647	my $pid;	1847	my $pid;
1648		1848
1649	AnyEvent->_emit_childstatus ($pid, $?)	1849	AnyEvent->_emit_childstatus ($pid, $?)
1650	while ($pid = waitpid -1, $WNOHANG) > 0;	1850	while ($pid = waitpid -1, WNOHANG) > 0;
1651	};	1851	};
1652		1852
1653	*child = sub {	1853	*child = sub {
1654	my (undef, %arg) = @_;	1854	my (undef, %arg) = @_;
1655		1855
1656	defined (my $pid = $arg{pid} + 0)	1856	my $pid = $arg{pid};
1657	or Carp::croak "required option 'pid' is missing";	1857	my $cb = $arg{cb};
1658		1858
1659	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1859	$PID_CB{$pid}{$cb+0} = $cb;
1660
1661	# WNOHANG is almost cetrainly 1 everywhere
1662	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1663	? 1
1664	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1665		1860
1666	unless ($CHLD_W) {	1861	unless ($CHLD_W) {
1667	$CHLD_W = AE::signal CHLD => \&_sigchld;	1862	$CHLD_W = AE::signal CHLD => \&_sigchld;
1668	# child could be a zombie already, so make at least one round	1863	# child could be a zombie already, so make at least one round
1669	&_sigchld;	1864	&_sigchld;
1670	}	1865	}
1671		1866
1672	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1867	bless [$pid, $cb+0], "AnyEvent::Base::child"
1673	};	1868	};
1674		1869
1675	*AnyEvent::Base::child::DESTROY = sub {	1870	*AnyEvent::Base::child::DESTROY = sub {
1676	my ($pid, $cb) = @{$_[0]};	1871	my ($pid, $icb) = @{$_[0]};
1677		1872
1678	delete $PID_CB{$pid}{$cb};	1873	delete $PID_CB{$pid}{$icb};
1679	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1874	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1680		1875
1681	undef $CHLD_W unless keys %PID_CB;	1876	undef $CHLD_W unless keys %PID_CB;
1682	};	1877	};
1683	};	1878	};
…		…
1696		1891
1697	my ($cb, $w, $rcb) = $arg{cb};	1892	my ($cb, $w, $rcb) = $arg{cb};
1698		1893
1699	$rcb = sub {	1894	$rcb = sub {
1700	if ($cb) {	1895	if ($cb) {
1701	$w = _time;	1896	$w = AE::time;
1702	&$cb;	1897	&$cb;
1703	$w = _time - $w;	1898	$w = AE::time - $w;
1704		1899
1705	# never use more then 50% of the time for the idle watcher,	1900	# never use more then 50% of the time for the idle watcher,
1706	# within some limits	1901	# within some limits
1707	$w = 0.0001 if $w < 0.0001;	1902	$w = 0.0001 if $w < 0.0001;
1708	$w = 5 if $w > 5;	1903	$w = 5 if $w > 5;
…		…
1755		1950
1756	sub _send {	1951	sub _send {
1757	# nop	1952	# nop
1758	}	1953	}
1759		1954
		1955	sub _wait {
		1956	AnyEvent->_poll until $_[0]{_ae_sent};
		1957	}
		1958
1760	sub send {	1959	sub send {
1761	my $cv = shift;	1960	my $cv = shift;
1762	$cv->{_ae_sent} = [@_];	1961	$cv->{_ae_sent} = [@_];
1763	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};	1962	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1764	$cv->_send;	1963	$cv->_send;
…		…
1771		1970
1772	sub ready {	1971	sub ready {
1773	$_[0]{_ae_sent}	1972	$_[0]{_ae_sent}
1774	}	1973	}
1775		1974
1776	sub _wait {
1777	$WAITING
1778	and !$_[0]{_ae_sent}
1779	and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1780
1781	local $WAITING = 1;
1782	AnyEvent->one_event while !$_[0]{_ae_sent};
1783	}
1784
1785	sub recv {	1975	sub recv {
		1976	unless ($_[0]{_ae_sent}) {
		1977	$WAITING
		1978	and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
		1979
		1980	local $WAITING = 1;
1786	$_[0]->_wait;	1981	$_[0]->_wait;
		1982	}
1787		1983
1788	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1984	$_[0]{_ae_croak}
1789	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1985	and Carp::croak $_[0]{_ae_croak};
		1986
		1987	wantarray
		1988	? @{ $_[0]{_ae_sent} }
		1989	: $_[0]{_ae_sent}[0]
1790	}	1990	}
1791		1991
1792	sub cb {	1992	sub cb {
1793	my $cv = shift;	1993	my $cv = shift;
1794		1994
…		…
1810	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };	2010	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };
1811	}	2011	}
1812		2012
1813	# undocumented/compatibility with pre-3.4	2013	# undocumented/compatibility with pre-3.4
1814	*broadcast = \&send;	2014	*broadcast = \&send;
1815	*wait = \&_wait;	2015	*wait = \&recv;
1816		2016
1817	=head1 ERROR AND EXCEPTION HANDLING	2017	=head1 ERROR AND EXCEPTION HANDLING
1818		2018
1819	In general, AnyEvent does not do any error handling - it relies on the	2019	In general, AnyEvent does not do any error handling - it relies on the
1820	caller to do that if required. The L<AnyEvent::Strict> module (see also	2020	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
1832	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and	2032	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
1833	so on.	2033	so on.
1834		2034
1835	=head1 ENVIRONMENT VARIABLES	2035	=head1 ENVIRONMENT VARIABLES
1836		2036
1837	The following environment variables are used by this module or its	2037	AnyEvent supports a number of environment variables that tune the
1838	submodules.	2038	runtime behaviour. They are usually evaluated when AnyEvent is
		2039	loaded, initialised, or a submodule that uses them is loaded. Many of
		2040	them also cause AnyEvent to load additional modules - for example,
		2041	C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be
		2042	loaded.
1839		2043
1840	Note that AnyEvent will remove I<all> environment variables starting with	2044	All the environment variables documented here start with
1841	C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is	2045	C<PERL_ANYEVENT_>, which is what AnyEvent considers its own
1842	enabled.	2046	namespace. Other modules are encouraged (but by no means required) to use
		2047	C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule
		2048	namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could
		2049	be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env
		2050	variables starting with C<AE_>, see below).
		2051
		2052	All variables can also be set via the C<AE_> prefix, that is, instead
		2053	of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In
		2054	case there is a clash btween anyevent and another program that uses
		2055	C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something>
		2056	variable to the empty string, as those variables take precedence.
		2057
		2058	When AnyEvent is first loaded, it copies all C<AE_xxx> env variables
		2059	to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already
		2060	exists. If taint mode is on, then AnyEvent will remove I<all> environment
		2061	variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them
		2062	with C<undef> or the empty string, if the corresaponding C<AE_> variable
		2063	is set).
		2064
		2065	The exact algorithm is currently:
		2066
		2067	1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV
		2068	2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists
		2069	3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef.
		2070
		2071	This ensures that child processes will not see the C<AE_> variables.
		2072
		2073	The following environment variables are currently known to AnyEvent:
1843		2074
1844	=over 4	2075	=over 4
1845		2076
1846	=item C<PERL_ANYEVENT_VERBOSE>	2077	=item C<PERL_ANYEVENT_VERBOSE>
1847		2078
1848	By default, AnyEvent will be completely silent except in fatal	2079	By default, AnyEvent will log messages with loglevel C<4> (C<error>) or
1849	conditions. You can set this environment variable to make AnyEvent more	2080	higher (see L<AnyEvent::Log>). You can set this environment variable to a
1850	talkative.	2081	numerical loglevel to make AnyEvent more (or less) talkative.
1851		2082
		2083	If you want to do more than just set the global logging level
		2084	you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
		2085	complex specifications.
		2086
		2087	When set to C<0> (C<off>), then no messages whatsoever will be logged with
		2088	everything else at defaults.
		2089
1852	When set to C<1> or higher, causes AnyEvent to warn about unexpected	2090	When set to C<5> or higher (C<warn>), AnyEvent warns about unexpected
1853	conditions, such as not being able to load the event model specified by	2091	conditions, such as not being able to load the event model specified by
1854	C<PERL_ANYEVENT_MODEL>.	2092	C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an exception - this
		2093	is the minimum recommended level for use during development.
1855		2094
1856	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	2095	When set to C<7> or higher (info), AnyEvent reports which event model it
1857	model it chooses.	2096	chooses.
1858		2097
1859	When set to C<8> or higher, then AnyEvent will report extra information on	2098	When set to C<8> or higher (debug), then AnyEvent will report extra
1860	which optional modules it loads and how it implements certain features.	2099	information on which optional modules it loads and how it implements
		2100	certain features.
		2101
		2102	=item C<PERL_ANYEVENT_LOG>
		2103
		2104	Accepts rather complex logging specifications. For example, you could log
		2105	all C<debug> messages of some module to stderr, warnings and above to
		2106	stderr, and errors and above to syslog, with:
		2107
		2108	PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog
		2109
		2110	For the rather extensive details, see L<AnyEvent::Log>.
		2111
		2112	This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
		2113	so will take effect even before AnyEvent has initialised itself.
		2114
		2115	Note that specifying this environment variable causes the L<AnyEvent::Log>
		2116	module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
		2117	using the latter saves a few hundred kB of memory unless a module
		2118	explicitly needs the extra features of AnyEvent::Log.
1861		2119
1862	=item C<PERL_ANYEVENT_STRICT>	2120	=item C<PERL_ANYEVENT_STRICT>
1863		2121
1864	AnyEvent does not do much argument checking by default, as thorough	2122	AnyEvent does not do much argument checking by default, as thorough
1865	argument checking is very costly. Setting this variable to a true value	2123	argument checking is very costly. Setting this variable to a true value
…		…
1872	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>	2130	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>
1873	>>, it is definitely recommended to keep it off in production. Keeping	2131	>>, it is definitely recommended to keep it off in production. Keeping
1874	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2132	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1875	can be very useful, however.	2133	can be very useful, however.
1876		2134
		2135	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2136
		2137	If this env variable is nonempty, then its contents will be interpreted by
		2138	C<AnyEvent::Socket::parse_hostport> and C<AnyEvent::Debug::shell> (after
		2139	replacing every occurance of C<$$> by the process pid). The shell object
		2140	is saved in C<$AnyEvent::Debug::SHELL>.
		2141
		2142	This happens when the first watcher is created.
		2143
		2144	For example, to bind a debug shell on a unix domain socket in
		2145	F<< /tmp/debug<pid>.sock >>, you could use this:
		2146
		2147	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2148	# connect with e.g.: socat readline /tmp/debug123.sock
		2149
		2150	Or to bind to tcp port 4545 on localhost:
		2151
		2152	PERL_ANYEVENT_DEBUG_SHELL=127.0.0.1:4545 perlprog
		2153	# connect with e.g.: telnet localhost 4545
		2154
		2155	Note that creating sockets in F</tmp> or on localhost is very unsafe on
		2156	multiuser systems.
		2157
		2158	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2159
		2160	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2161	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2162
1877	=item C<PERL_ANYEVENT_MODEL>	2163	=item C<PERL_ANYEVENT_MODEL>
1878		2164
1879	This can be used to specify the event model to be used by AnyEvent, before	2165	This can be used to specify the event model to be used by AnyEvent, before
1880	auto detection and -probing kicks in. It must be a string consisting	2166	auto detection and -probing kicks in.
1881	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2167
		2168	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2169	or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1882	and the resulting module name is loaded and if the load was successful,	2170	resulting module name is loaded and - if the load was successful - used as
1883	used as event model. If it fails to load AnyEvent will proceed with	2171	event model backend. If it fails to load then AnyEvent will proceed with
1884	auto detection and -probing.	2172	auto detection and -probing.
1885		2173
1886	This functionality might change in future versions.	2174	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2175	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2176	the end of a string designates a module name and quotes it appropriately).
1887		2177
1888	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you	2178	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1889	could start your program like this:	2179	could start your program like this:
1890		2180
1891	PERL_ANYEVENT_MODEL=Perl perl ...	2181	PERL_ANYEVENT_MODEL=Perl perl ...
		2182
		2183	=item C<PERL_ANYEVENT_IO_MODEL>
		2184
		2185	The current file I/O model - see L<AnyEvent::IO> for more info.
		2186
		2187	At the moment, only C<Perl> (small, pure-perl, synchronous) and
		2188	C<IOAIO> (truly asynchronous) are supported. The default is C<IOAIO> if
		2189	L<AnyEvent::AIO> can be loaded, otherwise it is C<Perl>.
1892		2190
1893	=item C<PERL_ANYEVENT_PROTOCOLS>	2191	=item C<PERL_ANYEVENT_PROTOCOLS>
1894		2192
1895	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences	2193	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences
1896	for IPv4 or IPv6. The default is unspecified (and might change, or be the result	2194	for IPv4 or IPv6. The default is unspecified (and might change, or be the result
…		…
1909	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>	2207	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1910	- only support IPv4, never try to resolve or contact IPv6	2208	- only support IPv4, never try to resolve or contact IPv6
1911	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or	2209	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1912	IPv6, but prefer IPv6 over IPv4.	2210	IPv6, but prefer IPv6 over IPv4.
1913		2211
		2212	=item C<PERL_ANYEVENT_HOSTS>
		2213
		2214	This variable, if specified, overrides the F</etc/hosts> file used by
		2215	L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read
		2216	from that file instead.
		2217
1914	=item C<PERL_ANYEVENT_EDNS0>	2218	=item C<PERL_ANYEVENT_EDNS0>
1915		2219
1916	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension	2220	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension for
1917	for DNS. This extension is generally useful to reduce DNS traffic, but	2221	DNS. This extension is generally useful to reduce DNS traffic, especially
1918	some (broken) firewalls drop such DNS packets, which is why it is off by	2222	when DNSSEC is involved, but some (broken) firewalls drop such DNS
1919	default.	2223	packets, which is why it is off by default.
1920		2224
1921	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	2225	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1922	EDNS0 in its DNS requests.	2226	EDNS0 in its DNS requests.
1923		2227
1924	=item C<PERL_ANYEVENT_MAX_FORKS>	2228	=item C<PERL_ANYEVENT_MAX_FORKS>
…		…
1930		2234
1931	The default value for the C<max_outstanding> parameter for the default DNS	2235	The default value for the C<max_outstanding> parameter for the default DNS
1932	resolver - this is the maximum number of parallel DNS requests that are	2236	resolver - this is the maximum number of parallel DNS requests that are
1933	sent to the DNS server.	2237	sent to the DNS server.
1934		2238
		2239	=item C<PERL_ANYEVENT_MAX_SIGNAL_LATENCY>
		2240
		2241	Perl has inherently racy signal handling (you can basically choose between
		2242	losing signals and memory corruption) - pure perl event loops (including
		2243	C<AnyEvent::Loop>, when C<Async::Interrupt> isn't available) therefore
		2244	have to poll regularly to avoid losing signals.
		2245
		2246	Some event loops are racy, but don't poll regularly, and some event loops
		2247	are written in C but are still racy. For those event loops, AnyEvent
		2248	installs a timer that regularly wakes up the event loop.
		2249
		2250	By default, the interval for this timer is C<10> seconds, but you can
		2251	override this delay with this environment variable (or by setting
		2252	the C<$AnyEvent::MAX_SIGNAL_LATENCY> variable before creating signal
		2253	watchers).
		2254
		2255	Lower values increase CPU (and energy) usage, higher values can introduce
		2256	long delays when reaping children or waiting for signals.
		2257
		2258	The L<AnyEvent::Async> module, if available, will be used to avoid this
		2259	polling (with most event loops).
		2260
1935	=item C<PERL_ANYEVENT_RESOLV_CONF>	2261	=item C<PERL_ANYEVENT_RESOLV_CONF>
1936		2262
1937	The file to use instead of F</etc/resolv.conf> (or OS-specific	2263	The absolute path to a F<resolv.conf>-style file to use instead of
1938	configuration) in the default resolver. When set to the empty string, no	2264	F</etc/resolv.conf> (or the OS-specific configuration) in the default
1939	default config will be used.	2265	resolver, or the empty string to select the default configuration.
1940		2266
1941	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.	2267	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.
1942		2268
1943	When neither C<ca_file> nor C<ca_path> was specified during	2269	When neither C<ca_file> nor C<ca_path> was specified during
1944	L<AnyEvent::TLS> context creation, and either of these environment	2270	L<AnyEvent::TLS> context creation, and either of these environment
1945	variables exist, they will be used to specify CA certificate locations	2271	variables are nonempty, they will be used to specify CA certificate
1946	instead of a system-dependent default.	2272	locations instead of a system-dependent default.
1947		2273
1948	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>	2274	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>
1949		2275
1950	When these are set to C<1>, then the respective modules are not	2276	When these are set to C<1>, then the respective modules are not
1951	loaded. Mostly good for testing AnyEvent itself.	2277	loaded. Mostly good for testing AnyEvent itself.
…		…
2283	(even when used without AnyEvent), but most event loops have acceptable	2609	(even when used without AnyEvent), but most event loops have acceptable
2284	performance with or without AnyEvent.	2610	performance with or without AnyEvent.
2285		2611
2286	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2612	=item * The overhead AnyEvent adds is usually much smaller than the overhead of
2287	the actual event loop, only with extremely fast event loops such as EV	2613	the actual event loop, only with extremely fast event loops such as EV
2288	adds AnyEvent significant overhead.	2614	does AnyEvent add significant overhead.
2289		2615
2290	=item * You should avoid POE like the plague if you want performance or	2616	=item * You should avoid POE like the plague if you want performance or
2291	reasonable memory usage.	2617	reasonable memory usage.
2292		2618
2293	=back	2619	=back
…		…
2592		2918
2593	=item L<Time::HiRes>	2919	=item L<Time::HiRes>
2594		2920
2595	This module is part of perl since release 5.008. It will be used when the	2921	This module is part of perl since release 5.008. It will be used when the
2596	chosen event library does not come with a timing source of its own. The	2922	chosen event library does not come with a timing source of its own. The
2597	pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to	2923	pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2598	try to use a monotonic clock for timing stability.	2924	try to use a monotonic clock for timing stability.
2599		2925
2600	=back	2926	=back
2601		2927
2602		2928
…		…
2668		2994
2669	Tutorial/Introduction: L<AnyEvent::Intro>.	2995	Tutorial/Introduction: L<AnyEvent::Intro>.
2670		2996
2671	FAQ: L<AnyEvent::FAQ>.	2997	FAQ: L<AnyEvent::FAQ>.
2672		2998
2673	Utility functions: L<AnyEvent::Util>.	2999	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		3000	(simply logging).
2674		3001
2675	Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>,	3002	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
2676	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	3003	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		3004
		3005	Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>,
		3006	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		3007	L<Qt>, L<POE>, L<FLTK>.
2677		3008
2678	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	3009	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2679	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	3010	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2680	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	3011	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2681	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	3012	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		3013	L<AnyEvent::Impl::FLTK>.
2682		3014
2683	Non-blocking file handles, sockets, TCP clients and	3015	Non-blocking handles, pipes, stream sockets, TCP clients and
2684	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	3016	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
		3017
		3018	Asynchronous File I/O: L<AnyEvent::IO>.
2685		3019
2686	Asynchronous DNS: L<AnyEvent::DNS>.	3020	Asynchronous DNS: L<AnyEvent::DNS>.
2687		3021
2688	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.	3022	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
2689		3023
…		…
2692		3026
2693		3027
2694	=head1 AUTHOR	3028	=head1 AUTHOR
2695		3029
2696	Marc Lehmann <schmorp@schmorp.de>	3030	Marc Lehmann <schmorp@schmorp.de>
2697	http://home.schmorp.de/	3031	http://anyevent.schmorp.de
2698		3032
2699	=cut	3033	=cut
2700		3034
2701	1	3035	1
2702		3036

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.340 by root, Fri Dec 3 18:39:06 2010 UTC vs. Revision 1.407 by root, Thu Nov 15 01:25:05 2012 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.340 by root, Fri Dec 3 18:39:06 2010 UTC vs.
Revision 1.407 by root, Thu Nov 15 01:25:05 2012 UTC