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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.334 by root, Tue Oct 12 06:51:15 2010 UTC vs.
Revision 1.408 by root, Thu Dec 6 12:04:23 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
…		…
765	};	763	};
766	}	764	}
767		765
768	$cv->end;	766	$cv->end;
769		767
		768	...
		769
		770	my $results = $cv->recv;
		771
770	This code fragment supposedly pings a number of hosts and calls	772	This code fragment supposedly pings a number of hosts and calls
771	C<send> after results for all then have have been gathered - in any	773	C<send> after results for all then have have been gathered - in any
772	order. To achieve this, the code issues a call to C<begin> when it starts	774	order. To achieve this, the code issues a call to C<begin> when it starts
773	each ping request and calls C<end> when it has received some result for	775	each ping request and calls C<end> when it has received some result for
774	it. Since C<begin> and C<end> only maintain a counter, the order in which	776	it. Since C<begin> and C<end> only maintain a counter, the order in which
…		…
860	use. If EV is not installed, then AnyEvent will fall back to its own	862	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	863	pure-perl implementation, which is available everywhere as it comes with
862	AnyEvent itself.	864	AnyEvent itself.
863		865
864	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	866	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
865	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	867	AnyEvent::Impl::Perl pure-perl AnyEvent::Loop, fast and portable.
866		868
867	=item Backends that are transparently being picked up when they are used.	869	=item Backends that are transparently being picked up when they are used.
868		870
869	These will be used if they are already loaded when the first watcher	871	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	872	is created, in which case it is assumed that the application is using
…		…
876	AnyEvent::Impl::Glib based on Glib, slow but very stable.	878	AnyEvent::Impl::Glib based on Glib, slow but very stable.
877	AnyEvent::Impl::Tk based on Tk, very broken.	879	AnyEvent::Impl::Tk based on Tk, very broken.
878	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	880	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
879	AnyEvent::Impl::POE based on POE, very slow, some limitations.	881	AnyEvent::Impl::POE based on POE, very slow, some limitations.
880	AnyEvent::Impl::Irssi used when running within irssi.	882	AnyEvent::Impl::Irssi used when running within irssi.
		883	AnyEvent::Impl::IOAsync based on IO::Async.
		884	AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.
		885	AnyEvent::Impl::FLTK based on FLTK (fltk 2 binding).
881		886
882	=item Backends with special needs.	887	=item Backends with special needs.
883		888
884	Qt requires the Qt::Application to be instantiated first, but will	889	Qt requires the Qt::Application to be instantiated first, but will
885	otherwise be picked up automatically. As long as the main program	890	otherwise be picked up automatically. As long as the main program
886	instantiates the application before any AnyEvent watchers are created,	891	instantiates the application before any AnyEvent watchers are created,
887	everything should just work.	892	everything should just work.
888		893
889	AnyEvent::Impl::Qt based on Qt.	894	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		895
899	=item Event loops that are indirectly supported via other backends.	896	=item Event loops that are indirectly supported via other backends.
900		897
901	Some event loops can be supported via other modules:	898	Some event loops can be supported via other modules:
902		899
…		…
938		935
939	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model	936	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model
940	if necessary. You should only call this function right before you would	937	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	938	have created an AnyEvent watcher anyway, that is, as late as possible at
942	runtime, and not e.g. during initialisation of your module.	939	runtime, and not e.g. during initialisation of your module.
		940
		941	The effect of calling this function is as if a watcher had been created
		942	(specifically, actions that happen "when the first watcher is created"
		943	happen when calling detetc as well).
943		944
944	If you need to do some initialisation before AnyEvent watchers are	945	If you need to do some initialisation before AnyEvent watchers are
945	created, use C<post_detect>.	946	created, use C<post_detect>.
946		947
947	=item $guard = AnyEvent::post_detect { BLOCK }	948	=item $guard = AnyEvent::post_detect { BLOCK }
…		…
1010	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent	1011	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1011	# as soon as it is	1012	# as soon as it is
1012	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };	1013	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1013	}	1014	}
1014		1015
		1016	=item AnyEvent::postpone { BLOCK }
		1017
		1018	Arranges for the block to be executed as soon as possible, but not before
		1019	the call itself returns. In practise, the block will be executed just
		1020	before the event loop polls for new events, or shortly afterwards.
		1021
		1022	This function never returns anything (to make the C<return postpone { ...
		1023	}> idiom more useful.
		1024
		1025	To understand the usefulness of this function, consider a function that
		1026	asynchronously does something for you and returns some transaction
		1027	object or guard to let you cancel the operation. For example,
		1028	C<AnyEvent::Socket::tcp_connect>:
		1029
		1030	# start a conenction attempt unless one is active
		1031	$self->{connect_guard} \|\|= AnyEvent::Socket::tcp_connect "www.example.net", 80, sub {
		1032	delete $self->{connect_guard};
		1033	...
		1034	};
		1035
		1036	Imagine that this function could instantly call the callback, for
		1037	example, because it detects an obvious error such as a negative port
		1038	number. Invoking the callback before the function returns causes problems
		1039	however: the callback will be called and will try to delete the guard
		1040	object. But since the function hasn't returned yet, there is nothing to
		1041	delete. When the function eventually returns it will assign the guard
		1042	object to C<< $self->{connect_guard} >>, where it will likely never be
		1043	deleted, so the program thinks it is still trying to connect.
		1044
		1045	This is where C<AnyEvent::postpone> should be used. Instead of calling the
		1046	callback directly on error:
		1047
		1048	$cb->(undef), return # signal error to callback, BAD!
		1049	if $some_error_condition;
		1050
		1051	It should use C<postpone>:
		1052
		1053	AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later
		1054	if $some_error_condition;
		1055
		1056	=item AnyEvent::log $level, $msg[, @args]
		1057
		1058	Log the given C<$msg> at the given C<$level>.
		1059
		1060	If L<AnyEvent::Log> is not loaded then this function makes a simple test
		1061	to see whether the message will be logged. If the test succeeds it will
		1062	load AnyEvent::Log and call C<AnyEvent::Log::log> - consequently, look at
		1063	the L<AnyEvent::Log> documentation for details.
		1064
		1065	If the test fails it will simply return. Right now this happens when a
		1066	numerical loglevel is used and it is larger than the level specified via
		1067	C<$ENV{PERL_ANYEVENT_VERBOSE}>.
		1068
		1069	If you want to sprinkle loads of logging calls around your code, consider
		1070	creating a logger callback with the C<AnyEvent::Log::logger> function,
		1071	which can reduce typing, codesize and can reduce the logging overhead
		1072	enourmously.
		1073
1015	=back	1074	=back
1016		1075
1017	=head1 WHAT TO DO IN A MODULE	1076	=head1 WHAT TO DO IN A MODULE
1018		1077
1019	As a module author, you should C<use AnyEvent> and call AnyEvent methods	1078	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	1111	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	1112	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.	1113	might choose the wrong one unless you load the correct one yourself.
1055		1114
1056	You can chose to use a pure-perl implementation by loading the	1115	You can chose to use a pure-perl implementation by loading the
1057	C<AnyEvent::Impl::Perl> module, which gives you similar behaviour	1116	C<AnyEvent::Loop> module, which gives you similar behaviour
1058	everywhere, but letting AnyEvent chose the model is generally better.	1117	everywhere, but letting AnyEvent chose the model is generally better.
1059		1118
1060	=head2 MAINLOOP EMULATION	1119	=head2 MAINLOOP EMULATION
1061		1120
1062	Sometimes (often for short test scripts, or even standalone programs who	1121	Sometimes (often for short test scripts, or even standalone programs who
…		…
1075		1134
1076		1135
1077	=head1 OTHER MODULES	1136	=head1 OTHER MODULES
1078		1137
1079	The following is a non-exhaustive list of additional modules that use	1138	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	1139	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	1140	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.	1141	modules come as part of AnyEvent, the others are available via CPAN (see
		1142	L<http://search.cpan.org/search?m=module&q=anyevent%3A%3A*> for
		1143	a longer non-exhaustive list), and the list is heavily biased towards
		1144	modules of the AnyEvent author himself :)
1083		1145
1084	=over 4	1146	=over 4
1085		1147
1086	=item L<AnyEvent::Util>	1148	=item L<AnyEvent::Util>
1087		1149
…		…
1107	=item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP>	1169	=item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP>
1108		1170
1109	Implement event-based interfaces to the protocols of the same name (for	1171	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	1172	the curious, IGS is the International Go Server and FCP is the Freenet
1111	Client Protocol).	1173	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		1174
1135	=item L<AnyEvent::AIO>	1175	=item L<AnyEvent::AIO>
1136		1176
1137	Truly asynchronous (as opposed to non-blocking) I/O, should be in the	1177	Truly asynchronous (as opposed to non-blocking) I/O, should be in the
1138	toolbox of every event programmer. AnyEvent::AIO transparently fuses	1178	toolbox of every event programmer. AnyEvent::AIO transparently fuses
1139	L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based	1179	L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based
1140	file I/O, and much more.	1180	file I/O, and much more.
1141		1181
		1182	=item L<AnyEvent::Filesys::Notify>
		1183
		1184	AnyEvent is good for non-blocking stuff, but it can't detect file or
		1185	path changes (e.g. "watch this directory for new files", "watch this
		1186	file for changes"). The L<AnyEvent::Filesys::Notify> module promises to
		1187	do just that in a portbale fashion, supporting inotify on GNU/Linux and
		1188	some weird, without doubt broken, stuff on OS X to monitor files. It can
		1189	fall back to blocking scans at regular intervals transparently on other
		1190	platforms, so it's about as portable as it gets.
		1191
		1192	(I haven't used it myself, but I haven't heard anybody complaining about
		1193	it yet).
		1194
		1195	=item L<AnyEvent::DBI>
		1196
		1197	Executes L<DBI> requests asynchronously in a proxy process for you,
		1198	notifying you in an event-based way when the operation is finished.
		1199
1142	=item L<AnyEvent::HTTPD>	1200	=item L<AnyEvent::HTTPD>
1143		1201
1144	A simple embedded webserver.	1202	A simple embedded webserver.
1145		1203
1146	=item L<AnyEvent::FastPing>	1204	=item L<AnyEvent::FastPing>
1147		1205
1148	The fastest ping in the west.	1206	The fastest ping in the west.
1149		1207
1150	=item L<Coro>	1208	=item L<Coro>
1151		1209
1152	Has special support for AnyEvent via L<Coro::AnyEvent>.	1210	Has special support for AnyEvent via L<Coro::AnyEvent>, which allows you
		1211	to simply invert the flow control - don't call us, we will call you:
		1212
		1213	async {
		1214	Coro::AnyEvent::sleep 5; # creates a 5s timer and waits for it
		1215	print "5 seconds later!\n";
		1216
		1217	Coro::AnyEvent::readable *STDIN; # uses an I/O watcher
		1218	my $line = <STDIN>; # works for ttys
		1219
		1220	AnyEvent::HTTP::http_get "url", Coro::rouse_cb;
		1221	my ($body, $hdr) = Coro::rouse_wait;
		1222	};
1153		1223
1154	=back	1224	=back
1155		1225
1156	=cut	1226	=cut
1157		1227
1158	package AnyEvent;	1228	package AnyEvent;
1159		1229
1160	# basically a tuned-down version of common::sense	1230	# basically a tuned-down version of common::sense
1161	sub common_sense {	1231	sub common_sense {
1162	# from common:.sense 3.3	1232	# from common:.sense 3.5
		1233	local $^W;
1163	${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf3\x0f\xc0\xf0\xfc\x33\x00";	1234	${^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)	1235	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1165	$^H \|= 0x00000600;	1236	$^H \|= 0x00000600;
1166	}	1237	}
1167		1238
1168	BEGIN { AnyEvent::common_sense }	1239	BEGIN { AnyEvent::common_sense }
1169		1240
1170	use Carp ();	1241	use Carp ();
1171		1242
1172	our $VERSION = '5.271';	1243	our $VERSION = '7.04';
1173	our $MODEL;	1244	our $MODEL;
1174
1175	our $AUTOLOAD;
1176	our @ISA;	1245	our @ISA;
1177
1178	our @REGISTRY;	1246	our @REGISTRY;
1179
1180	our $VERBOSE;	1247	our $VERBOSE;
		1248	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
		1249	our $MAX_SIGNAL_LATENCY = $ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY} \|\| 10; # executes after the BEGIN block below (tainting!)
1181		1250
1182	BEGIN {	1251	BEGIN {
1183	require "AnyEvent/constants.pl";	1252	require "AnyEvent/constants.pl";
1184		1253
1185	eval "sub TAINT (){" . (${^TAINT}*1) . "}";	1254	eval "sub TAINT (){" . (${^TAINT}*1) . "}";
1186		1255
1187	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1256	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1188	if ${^TAINT};	1257	if ${^TAINT};
1189		1258
1190	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1259	$ENV{"PERL_ANYEVENT_$_"} = $ENV{"AE_$_"}
		1260	for grep s/^AE_// && !exists $ENV{"PERL_ANYEVENT_$_"}, keys %ENV;
1191		1261
1192	}	1262	@ENV{grep /^PERL_ANYEVENT_/, keys %ENV} = ()
		1263	if ${^TAINT};
1193		1264
1194	our $MAX_SIGNAL_LATENCY = 10;	1265	# $ENV{PERL_ANYEVENT_xxx} now valid
1195		1266
1196	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred	1267	$VERBOSE = length $ENV{PERL_ANYEVENT_VERBOSE} ? $ENV{PERL_ANYEVENT_VERBOSE}*1 : 4;
1197		1268
1198	{
1199	my $idx;	1269	my $idx;
1200	$PROTOCOL{$_} = ++$idx	1270	$PROTOCOL{$_} = ++$idx
1201	for reverse split /\s,\s/,	1271	for reverse split /\s,\s/,
1202	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1272	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1203	}	1273	}
1204		1274
		1275	our @post_detect;
		1276
		1277	sub post_detect(&) {
		1278	my ($cb) = @_;
		1279
		1280	push @post_detect, $cb;
		1281
		1282	defined wantarray
		1283	? bless \$cb, "AnyEvent::Util::postdetect"
		1284	: ()
		1285	}
		1286
		1287	sub AnyEvent::Util::postdetect::DESTROY {
		1288	@post_detect = grep $_ != ${$_[0]}, @post_detect;
		1289	}
		1290
		1291	our $POSTPONE_W;
		1292	our @POSTPONE;
		1293
		1294	sub _postpone_exec {
		1295	undef $POSTPONE_W;
		1296
		1297	&{ shift @POSTPONE }
		1298	while @POSTPONE;
		1299	}
		1300
		1301	sub postpone(&) {
		1302	push @POSTPONE, shift;
		1303
		1304	$POSTPONE_W \|\|= AE::timer (0, 0, \&_postpone_exec);
		1305
		1306	()
		1307	}
		1308
		1309	sub log($$;@) {
		1310	# only load the big bloated module when we actually are about to log something
		1311	if ($_[0] <= ($VERBOSE \|\| 1)) { # also catches non-numeric levels(!) and fatal
		1312	local ($!, $@);
		1313	require AnyEvent::Log; # among other things, sets $VERBOSE to 9
		1314	# AnyEvent::Log overwrites this function
		1315	goto &log;
		1316	}
		1317
		1318	0 # not logged
		1319	}
		1320
		1321	sub _logger($;$) {
		1322	my ($level, $renabled) = @_;
		1323
		1324	$$renabled = $level <= $VERBOSE;
		1325
		1326	my $logger = [(caller)[0], $level, $renabled];
		1327
		1328	$AnyEvent::Log::LOGGER{$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
1205	my @models = (	1352	our @models = (
1206	[EV:: => AnyEvent::Impl::EV:: , 1],	1353	[EV:: => AnyEvent::Impl::EV::],
1207	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1354	[AnyEvent::Loop:: => AnyEvent::Impl::Perl::],
1208	# everything below here will not (normally) be autoprobed	1355	# everything below here will not (normally) be autoprobed
1209	# as the pureperl backend should work everywhere	1356	# as the pure perl backend should work everywhere
1210	# 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
1211	[Event:: => AnyEvent::Impl::Event::, 1],	1359	[Event:: => AnyEvent::Impl::Event::], # slow, stable
1212	[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
1213	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1362	[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	1363	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1216	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1364	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1217	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1365	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1218	[Wx:: => AnyEvent::Impl::POE::],	1366	[Wx:: => AnyEvent::Impl::POE::],
1219	[Prima:: => AnyEvent::Impl::POE::],	1367	[Prima:: => AnyEvent::Impl::POE::],
1220	# IO::Async is just too broken - we would need workarounds for its	1368	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1221	# byzantine signal and broken child handling, among others.	1369	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1222	# IO::Async is rather hard to detect, as it doesn't have any	1370	[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	);	1371	);
1229		1372
1230	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, $reset_ae] : undef;
		1390
		1391	_isa_set;
		1392	}
		1393
		1394	# all autoloaded methods reserve the complete glob, not just the method slot.
		1395	# due to bugs in perls method cache implementation.
1231	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1396	our @methods = qw(io timer time now now_update signal child idle condvar);
1232
1233	our @post_detect;
1234
1235	sub post_detect(&) {
1236	my ($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		1397
1249	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 => "IO::Async::Loop::AnyEvent detected - that module is broken by\n"
		1406	. "design, 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
1250	# free some memory	1412	# free some memory
1251	*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;
1252		1421
1253	local $!; # for good measure
1254	local $SIG{__DIE__};
1255
1256	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1422	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1257	my $model = "AnyEvent::Impl::$1";	1423	my $model = $1;
		1424	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1258	if (eval "require $model") {	1425	if (eval "require $model") {
		1426	AnyEvent::log 7 => "Loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1259	$MODEL = $model;	1427	$MODEL = $model;
1260	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1261	} else {	1428	} else {
1262	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1429	AnyEvent::log 4 => "Unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1263	}	1430	}
1264	}	1431	}
1265		1432
1266	# check for already loaded models	1433	# check for already loaded models
1267	unless ($MODEL) {	1434	unless ($MODEL) {
1268	for (@REGISTRY, @models) {	1435	for (@REGISTRY, @models) {
1269	my ($package, $model) = @$_;	1436	my ($package, $model) = @$_;
1270	if (${"$package\::VERSION"} > 0) {	1437	if (${"$package\::VERSION"} > 0) {
1271	if (eval "require $model") {	1438	if (eval "require $model") {
		1439	AnyEvent::log 7 => "Autodetected model '$model', using it.";
1272	$MODEL = $model;	1440	$MODEL = $model;
1273	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;	1441	last;
		1442	} else {
		1443	AnyEvent::log 8 => "Detected event loop $package, but cannot load '$model', skipping: $@";
		1444	}
		1445	}
		1446	}
		1447
		1448	unless ($MODEL) {
		1449	# try to autoload a model
		1450	for (@REGISTRY, @models) {
		1451	my ($package, $model) = @$_;
		1452	if (
		1453	eval "require $package"
		1454	and ${"$package\::VERSION"} > 0
		1455	and eval "require $model"
		1456	) {
		1457	AnyEvent::log 7 => "Autoloaded model '$model', using it.";
		1458	$MODEL = $model;
1274	last;	1459	last;
1275	}	1460	}
1276	}	1461	}
1277	}
1278
1279	unless ($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		1462
1295	$MODEL	1463	$MODEL
1296	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";	1464	or AnyEvent::log fatal => "Backend autodetection failed - did you properly install AnyEvent?";
1297	}	1465	}
1298	}	1466	}
1299		1467
1300	@models = (); # free probe data	1468	# free memory only needed for probing
		1469	undef @models;
		1470	undef @REGISTRY;
1301		1471
1302	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1472	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1303	unshift @ISA, $MODEL;
1304		1473
1305	# now nuke some methods that are overriden by the backend.	1474	# now nuke some methods that are overridden by the backend.
1306	# SUPER is not allowed.	1475	# SUPER usage is not allowed in these.
1307	for (qw(time signal child idle)) {	1476	for (qw(time signal child idle)) {
1308	undef &{"AnyEvent::Base::$_"}	1477	undef &{"AnyEvent::Base::$_"}
1309	if defined &{"$MODEL\::$_"};	1478	if defined &{"$MODEL\::$_"};
1310	}	1479	}
1311		1480
1312	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};	1481	_isa_set;
		1482
		1483	# we're officially open!
		1484
		1485	if ($ENV{PERL_ANYEVENT_STRICT}) {
		1486	require AnyEvent::Strict;
		1487	}
		1488
		1489	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1490	require AnyEvent::Debug;
		1491	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1492	}
		1493
		1494	if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1495	require AnyEvent::Socket;
		1496	require AnyEvent::Debug;
		1497
		1498	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1499	$shell =~ s/\$\$/$$/g;
		1500
		1501	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1502	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1503	}
		1504
		1505	# now the anyevent environment is set up as the user told us to, so
		1506	# call the actual user code - post detects
1313		1507
1314	(shift @post_detect)->() while @post_detect;	1508	(shift @post_detect)->() while @post_detect;
		1509	undef @post_detect;
1315		1510
1316	*post_detect = sub(&) {	1511	*post_detect = sub(&) {
1317	shift->();	1512	shift->();
1318		1513
1319	undef	1514	undef
1320	};	1515	};
1321		1516
1322	$MODEL	1517	$MODEL
1323	}	1518	}
1324		1519
1325	sub AUTOLOAD {	1520	for my $name (@methods) {
1326	(my $func = $AUTOLOAD) =~ s/.*://;	1521	*$name = sub {
1327
1328	$method{$func}
1329	or Carp::croak "$func: not a valid AnyEvent class method";
1330
1331	detect;	1522	detect;
1332		1523	# we use goto because
1333	my $class = shift;	1524	# a) it makes the thunk more transparent
1334	$class->$func (@_);	1525	# b) it allows us to delete the thunk later
		1526	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
		1527	};
1335	}	1528	}
1336		1529
1337	# utility function to dup a filehandle. this is used by many backends	1530	# utility function to dup a filehandle. this is used by many backends
1338	# to support binding more than one watcher per filehandle (they usually	1531	# to support binding more than one watcher per filehandle (they usually
1339	# allow only one watcher per fd, so we dup it to get a different one).	1532	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1363		1556
1364	package AE;	1557	package AE;
1365		1558
1366	our $VERSION = $AnyEvent::VERSION;	1559	our $VERSION = $AnyEvent::VERSION;
1367		1560
		1561	sub _reset() {
		1562	eval q{
1368	# fall back to the main API by default - backends and AnyEvent::Base	1563	# fall back to the main API by default - backends and AnyEvent::Base
1369	# implementations can overwrite these.	1564	# implementations can overwrite these.
1370		1565
1371	sub io($$$) {	1566	sub io($$$) {
1372	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1567	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1373	}	1568	}
1374		1569
1375	sub timer($$$) {	1570	sub timer($$$) {
1376	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1571	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1377	}	1572	}
1378		1573
1379	sub signal($$) {	1574	sub signal($$) {
1380	AnyEvent->signal (signal => $_[0], cb => $_[1])	1575	AnyEvent->signal (signal => $_[0], cb => $_[1])
1381	}	1576	}
1382		1577
1383	sub child($$) {	1578	sub child($$) {
1384	AnyEvent->child (pid => $_[0], cb => $_[1])	1579	AnyEvent->child (pid => $_[0], cb => $_[1])
1385	}	1580	}
1386		1581
1387	sub idle($) {	1582	sub idle($) {
1388	AnyEvent->idle (cb => $_[0])	1583	AnyEvent->idle (cb => $_[0]);
1389	}	1584	}
1390		1585
1391	sub cv(;&) {	1586	sub cv(;&) {
1392	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1587	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1393	}	1588	}
1394		1589
1395	sub now() {	1590	sub now() {
1396	AnyEvent->now	1591	AnyEvent->now
1397	}	1592	}
1398		1593
1399	sub now_update() {	1594	sub now_update() {
1400	AnyEvent->now_update	1595	AnyEvent->now_update
1401	}	1596	}
1402		1597
1403	sub time() {	1598	sub time() {
1404	AnyEvent->time	1599	AnyEvent->time
		1600	}
		1601
		1602	*postpone = \&AnyEvent::postpone;
		1603	*log = \&AnyEvent::log;
		1604	};
		1605	die if $@;
1405	}	1606	}
		1607
		1608	BEGIN { _reset }
1406		1609
1407	package AnyEvent::Base;	1610	package AnyEvent::Base;
1408		1611
1409	# default implementations for many methods	1612	# default implementations for many methods
1410		1613
1411	sub time {	1614	sub time {
1412	eval q{ # poor man's autoloading {}	1615	eval q{ # poor man's autoloading {}
1413	# probe for availability of Time::HiRes	1616	# probe for availability of Time::HiRes
1414	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1617	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1415	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1618	*time = sub { Time::HiRes::time () };
1416	*AE::time = \&Time::HiRes::time;	1619	*AE::time = \& Time::HiRes::time ;
		1620	*now = \&time;
		1621	AnyEvent::log 8 => "using Time::HiRes for sub-second timing accuracy.";
1417	# if (eval "use POSIX (); (POSIX::times())...	1622	# if (eval "use POSIX (); (POSIX::times())...
1418	} else {	1623	} else {
1419	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1624	*time = sub { CORE::time };
1420	*AE::time = sub (){ time }; # epic fail	1625	*AE::time = sub (){ CORE::time };
		1626	*now = \&time;
		1627	AnyEvent::log 3 => "Using built-in time(), no sub-second resolution!";
1421	}	1628	}
1422
1423	*time = sub { AE::time }; # different prototypes
1424	};	1629	};
1425	die if $@;	1630	die if $@;
1426		1631
1427	&time	1632	&time
1428	}	1633	}
1429		1634
1430	*now = \&time;	1635	*now = \&time;
1431
1432	sub now_update { }	1636	sub now_update { }
1433		1637
		1638	sub _poll {
		1639	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
		1640	}
		1641
1434	# default implementation for ->condvar	1642	# default implementation for ->condvar
		1643	# in fact, the default should not be overwritten
1435		1644
1436	sub condvar {	1645	sub condvar {
1437	eval q{ # poor man's autoloading {}	1646	eval q{ # poor man's autoloading {}
1438	*condvar = sub {	1647	*condvar = sub {
1439	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1648	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
…		…
1517		1726
1518	sub signal {	1727	sub signal {
1519	eval q{ # poor man's autoloading {}	1728	eval q{ # poor man's autoloading {}
1520	# probe for availability of Async::Interrupt	1729	# probe for availability of Async::Interrupt
1521	if (_have_async_interrupt) {	1730	if (_have_async_interrupt) {
1522	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1731	AnyEvent::log 8 => "Using Async::Interrupt for race-free signal handling.";
1523		1732
1524	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1733	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1525	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1734	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1526		1735
1527	} else {	1736	} else {
1528	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1737	AnyEvent::log 8 => "Using emulated perl signal handling with latency timer.";
1529		1738
1530	if (AnyEvent::WIN32) {	1739	if (AnyEvent::WIN32) {
1531	require AnyEvent::Util;	1740	require AnyEvent::Util;
1532		1741
1533	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1742	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1609	: sysread $SIGPIPE_R, (my $dummy), 9;	1818	: sysread $SIGPIPE_R, (my $dummy), 9;
1610		1819
1611	while (%SIG_EV) {	1820	while (%SIG_EV) {
1612	for (keys %SIG_EV) {	1821	for (keys %SIG_EV) {
1613	delete $SIG_EV{$_};	1822	delete $SIG_EV{$_};
1614	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1823	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1615	}	1824	}
1616	}	1825	}
1617	};	1826	};
1618	};	1827	};
1619	die if $@;	1828	die if $@;
…		…
1624	# default implementation for ->child	1833	# default implementation for ->child
1625		1834
1626	our %PID_CB;	1835	our %PID_CB;
1627	our $CHLD_W;	1836	our $CHLD_W;
1628	our $CHLD_DELAY_W;	1837	our $CHLD_DELAY_W;
1629	our $WNOHANG;
1630		1838
1631	# used by many Impl's	1839	# used by many Impl's
1632	sub _emit_childstatus($$) {	1840	sub _emit_childstatus($$) {
1633	my (undef, $rpid, $rstatus) = @_;	1841	my (undef, $rpid, $rstatus) = @_;
1634		1842
…		…
1641	eval q{ # poor man's autoloading {}	1849	eval q{ # poor man's autoloading {}
1642	*_sigchld = sub {	1850	*_sigchld = sub {
1643	my $pid;	1851	my $pid;
1644		1852
1645	AnyEvent->_emit_childstatus ($pid, $?)	1853	AnyEvent->_emit_childstatus ($pid, $?)
1646	while ($pid = waitpid -1, $WNOHANG) > 0;	1854	while ($pid = waitpid -1, WNOHANG) > 0;
1647	};	1855	};
1648		1856
1649	*child = sub {	1857	*child = sub {
1650	my (undef, %arg) = @_;	1858	my (undef, %arg) = @_;
1651		1859
1652	defined (my $pid = $arg{pid} + 0)	1860	my $pid = $arg{pid};
1653	or Carp::croak "required option 'pid' is missing";	1861	my $cb = $arg{cb};
1654		1862
1655	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1863	$PID_CB{$pid}{$cb+0} = $cb;
1656
1657	# WNOHANG is almost cetrainly 1 everywhere
1658	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1659	? 1
1660	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1661		1864
1662	unless ($CHLD_W) {	1865	unless ($CHLD_W) {
1663	$CHLD_W = AE::signal CHLD => \&_sigchld;	1866	$CHLD_W = AE::signal CHLD => \&_sigchld;
1664	# child could be a zombie already, so make at least one round	1867	# child could be a zombie already, so make at least one round
1665	&_sigchld;	1868	&_sigchld;
1666	}	1869	}
1667		1870
1668	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1871	bless [$pid, $cb+0], "AnyEvent::Base::child"
1669	};	1872	};
1670		1873
1671	*AnyEvent::Base::child::DESTROY = sub {	1874	*AnyEvent::Base::child::DESTROY = sub {
1672	my ($pid, $cb) = @{$_[0]};	1875	my ($pid, $icb) = @{$_[0]};
1673		1876
1674	delete $PID_CB{$pid}{$cb};	1877	delete $PID_CB{$pid}{$icb};
1675	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1878	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1676		1879
1677	undef $CHLD_W unless keys %PID_CB;	1880	undef $CHLD_W unless keys %PID_CB;
1678	};	1881	};
1679	};	1882	};
…		…
1692		1895
1693	my ($cb, $w, $rcb) = $arg{cb};	1896	my ($cb, $w, $rcb) = $arg{cb};
1694		1897
1695	$rcb = sub {	1898	$rcb = sub {
1696	if ($cb) {	1899	if ($cb) {
1697	$w = _time;	1900	$w = AE::time;
1698	&$cb;	1901	&$cb;
1699	$w = _time - $w;	1902	$w = AE::time - $w;
1700		1903
1701	# never use more then 50% of the time for the idle watcher,	1904	# never use more then 50% of the time for the idle watcher,
1702	# within some limits	1905	# within some limits
1703	$w = 0.0001 if $w < 0.0001;	1906	$w = 0.0001 if $w < 0.0001;
1704	$w = 5 if $w > 5;	1907	$w = 5 if $w > 5;
…		…
1751		1954
1752	sub _send {	1955	sub _send {
1753	# nop	1956	# nop
1754	}	1957	}
1755		1958
		1959	sub _wait {
		1960	AnyEvent->_poll until $_[0]{_ae_sent};
		1961	}
		1962
1756	sub send {	1963	sub send {
1757	my $cv = shift;	1964	my $cv = shift;
1758	$cv->{_ae_sent} = [@_];	1965	$cv->{_ae_sent} = [@_];
1759	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};	1966	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1760	$cv->_send;	1967	$cv->_send;
…		…
1767		1974
1768	sub ready {	1975	sub ready {
1769	$_[0]{_ae_sent}	1976	$_[0]{_ae_sent}
1770	}	1977	}
1771		1978
1772	sub _wait {
1773	$WAITING
1774	and !$_[0]{_ae_sent}
1775	and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1776
1777	local $WAITING = 1;
1778	AnyEvent->one_event while !$_[0]{_ae_sent};
1779	}
1780
1781	sub recv {	1979	sub recv {
		1980	unless ($_[0]{_ae_sent}) {
		1981	$WAITING
		1982	and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
		1983
		1984	local $WAITING = 1;
1782	$_[0]->_wait;	1985	$_[0]->_wait;
		1986	}
1783		1987
1784	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1988	$_[0]{_ae_croak}
1785	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1989	and Carp::croak $_[0]{_ae_croak};
		1990
		1991	wantarray
		1992	? @{ $_[0]{_ae_sent} }
		1993	: $_[0]{_ae_sent}[0]
1786	}	1994	}
1787		1995
1788	sub cb {	1996	sub cb {
1789	my $cv = shift;	1997	my $cv = shift;
1790		1998
…		…
1806	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };	2014	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };
1807	}	2015	}
1808		2016
1809	# undocumented/compatibility with pre-3.4	2017	# undocumented/compatibility with pre-3.4
1810	*broadcast = \&send;	2018	*broadcast = \&send;
1811	*wait = \&_wait;	2019	*wait = \&recv;
1812		2020
1813	=head1 ERROR AND EXCEPTION HANDLING	2021	=head1 ERROR AND EXCEPTION HANDLING
1814		2022
1815	In general, AnyEvent does not do any error handling - it relies on the	2023	In general, AnyEvent does not do any error handling - it relies on the
1816	caller to do that if required. The L<AnyEvent::Strict> module (see also	2024	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
1828	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and	2036	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
1829	so on.	2037	so on.
1830		2038
1831	=head1 ENVIRONMENT VARIABLES	2039	=head1 ENVIRONMENT VARIABLES
1832		2040
1833	The following environment variables are used by this module or its	2041	AnyEvent supports a number of environment variables that tune the
1834	submodules.	2042	runtime behaviour. They are usually evaluated when AnyEvent is
		2043	loaded, initialised, or a submodule that uses them is loaded. Many of
		2044	them also cause AnyEvent to load additional modules - for example,
		2045	C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be
		2046	loaded.
1835		2047
1836	Note that AnyEvent will remove I<all> environment variables starting with	2048	All the environment variables documented here start with
1837	C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is	2049	C<PERL_ANYEVENT_>, which is what AnyEvent considers its own
1838	enabled.	2050	namespace. Other modules are encouraged (but by no means required) to use
		2051	C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule
		2052	namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could
		2053	be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env
		2054	variables starting with C<AE_>, see below).
		2055
		2056	All variables can also be set via the C<AE_> prefix, that is, instead
		2057	of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In
		2058	case there is a clash btween anyevent and another program that uses
		2059	C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something>
		2060	variable to the empty string, as those variables take precedence.
		2061
		2062	When AnyEvent is first loaded, it copies all C<AE_xxx> env variables
		2063	to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already
		2064	exists. If taint mode is on, then AnyEvent will remove I<all> environment
		2065	variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them
		2066	with C<undef> or the empty string, if the corresaponding C<AE_> variable
		2067	is set).
		2068
		2069	The exact algorithm is currently:
		2070
		2071	1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV
		2072	2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists
		2073	3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef.
		2074
		2075	This ensures that child processes will not see the C<AE_> variables.
		2076
		2077	The following environment variables are currently known to AnyEvent:
1839		2078
1840	=over 4	2079	=over 4
1841		2080
1842	=item C<PERL_ANYEVENT_VERBOSE>	2081	=item C<PERL_ANYEVENT_VERBOSE>
1843		2082
1844	By default, AnyEvent will be completely silent except in fatal	2083	By default, AnyEvent will log messages with loglevel C<4> (C<error>) or
1845	conditions. You can set this environment variable to make AnyEvent more	2084	higher (see L<AnyEvent::Log>). You can set this environment variable to a
1846	talkative.	2085	numerical loglevel to make AnyEvent more (or less) talkative.
1847		2086
		2087	If you want to do more than just set the global logging level
		2088	you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
		2089	complex specifications.
		2090
		2091	When set to C<0> (C<off>), then no messages whatsoever will be logged with
		2092	everything else at defaults.
		2093
1848	When set to C<1> or higher, causes AnyEvent to warn about unexpected	2094	When set to C<5> or higher (C<warn>), AnyEvent warns about unexpected
1849	conditions, such as not being able to load the event model specified by	2095	conditions, such as not being able to load the event model specified by
1850	C<PERL_ANYEVENT_MODEL>.	2096	C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an exception - this
		2097	is the minimum recommended level for use during development.
1851		2098
1852	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	2099	When set to C<7> or higher (info), AnyEvent reports which event model it
1853	model it chooses.	2100	chooses.
1854		2101
1855	When set to C<8> or higher, then AnyEvent will report extra information on	2102	When set to C<8> or higher (debug), then AnyEvent will report extra
1856	which optional modules it loads and how it implements certain features.	2103	information on which optional modules it loads and how it implements
		2104	certain features.
		2105
		2106	=item C<PERL_ANYEVENT_LOG>
		2107
		2108	Accepts rather complex logging specifications. For example, you could log
		2109	all C<debug> messages of some module to stderr, warnings and above to
		2110	stderr, and errors and above to syslog, with:
		2111
		2112	PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog
		2113
		2114	For the rather extensive details, see L<AnyEvent::Log>.
		2115
		2116	This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
		2117	so will take effect even before AnyEvent has initialised itself.
		2118
		2119	Note that specifying this environment variable causes the L<AnyEvent::Log>
		2120	module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
		2121	using the latter saves a few hundred kB of memory unless a module
		2122	explicitly needs the extra features of AnyEvent::Log.
1857		2123
1858	=item C<PERL_ANYEVENT_STRICT>	2124	=item C<PERL_ANYEVENT_STRICT>
1859		2125
1860	AnyEvent does not do much argument checking by default, as thorough	2126	AnyEvent does not do much argument checking by default, as thorough
1861	argument checking is very costly. Setting this variable to a true value	2127	argument checking is very costly. Setting this variable to a true value
…		…
1868	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>	2134	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>
1869	>>, it is definitely recommended to keep it off in production. Keeping	2135	>>, it is definitely recommended to keep it off in production. Keeping
1870	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2136	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1871	can be very useful, however.	2137	can be very useful, however.
1872		2138
		2139	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2140
		2141	If this env variable is nonempty, then its contents will be interpreted by
		2142	C<AnyEvent::Socket::parse_hostport> and C<AnyEvent::Debug::shell> (after
		2143	replacing every occurance of C<$$> by the process pid). The shell object
		2144	is saved in C<$AnyEvent::Debug::SHELL>.
		2145
		2146	This happens when the first watcher is created.
		2147
		2148	For example, to bind a debug shell on a unix domain socket in
		2149	F<< /tmp/debug<pid>.sock >>, you could use this:
		2150
		2151	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2152	# connect with e.g.: socat readline /tmp/debug123.sock
		2153
		2154	Or to bind to tcp port 4545 on localhost:
		2155
		2156	PERL_ANYEVENT_DEBUG_SHELL=127.0.0.1:4545 perlprog
		2157	# connect with e.g.: telnet localhost 4545
		2158
		2159	Note that creating sockets in F</tmp> or on localhost is very unsafe on
		2160	multiuser systems.
		2161
		2162	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2163
		2164	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2165	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2166
1873	=item C<PERL_ANYEVENT_MODEL>	2167	=item C<PERL_ANYEVENT_MODEL>
1874		2168
1875	This can be used to specify the event model to be used by AnyEvent, before	2169	This can be used to specify the event model to be used by AnyEvent, before
1876	auto detection and -probing kicks in. It must be a string consisting	2170	auto detection and -probing kicks in.
1877	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2171
		2172	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2173	or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1878	and the resulting module name is loaded and if the load was successful,	2174	resulting module name is loaded and - if the load was successful - used as
1879	used as event model. If it fails to load AnyEvent will proceed with	2175	event model backend. If it fails to load then AnyEvent will proceed with
1880	auto detection and -probing.	2176	auto detection and -probing.
1881		2177
1882	This functionality might change in future versions.	2178	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2179	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2180	the end of a string designates a module name and quotes it appropriately).
1883		2181
1884	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you	2182	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1885	could start your program like this:	2183	could start your program like this:
1886		2184
1887	PERL_ANYEVENT_MODEL=Perl perl ...	2185	PERL_ANYEVENT_MODEL=Perl perl ...
		2186
		2187	=item C<PERL_ANYEVENT_IO_MODEL>
		2188
		2189	The current file I/O model - see L<AnyEvent::IO> for more info.
		2190
		2191	At the moment, only C<Perl> (small, pure-perl, synchronous) and
		2192	C<IOAIO> (truly asynchronous) are supported. The default is C<IOAIO> if
		2193	L<AnyEvent::AIO> can be loaded, otherwise it is C<Perl>.
1888		2194
1889	=item C<PERL_ANYEVENT_PROTOCOLS>	2195	=item C<PERL_ANYEVENT_PROTOCOLS>
1890		2196
1891	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences	2197	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences
1892	for IPv4 or IPv6. The default is unspecified (and might change, or be the result	2198	for IPv4 or IPv6. The default is unspecified (and might change, or be the result
…		…
1905	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>	2211	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1906	- only support IPv4, never try to resolve or contact IPv6	2212	- only support IPv4, never try to resolve or contact IPv6
1907	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or	2213	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1908	IPv6, but prefer IPv6 over IPv4.	2214	IPv6, but prefer IPv6 over IPv4.
1909		2215
		2216	=item C<PERL_ANYEVENT_HOSTS>
		2217
		2218	This variable, if specified, overrides the F</etc/hosts> file used by
		2219	L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read
		2220	from that file instead.
		2221
1910	=item C<PERL_ANYEVENT_EDNS0>	2222	=item C<PERL_ANYEVENT_EDNS0>
1911		2223
1912	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension	2224	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension for
1913	for DNS. This extension is generally useful to reduce DNS traffic, but	2225	DNS. This extension is generally useful to reduce DNS traffic, especially
1914	some (broken) firewalls drop such DNS packets, which is why it is off by	2226	when DNSSEC is involved, but some (broken) firewalls drop such DNS
1915	default.	2227	packets, which is why it is off by default.
1916		2228
1917	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	2229	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1918	EDNS0 in its DNS requests.	2230	EDNS0 in its DNS requests.
1919		2231
1920	=item C<PERL_ANYEVENT_MAX_FORKS>	2232	=item C<PERL_ANYEVENT_MAX_FORKS>
…		…
1926		2238
1927	The default value for the C<max_outstanding> parameter for the default DNS	2239	The default value for the C<max_outstanding> parameter for the default DNS
1928	resolver - this is the maximum number of parallel DNS requests that are	2240	resolver - this is the maximum number of parallel DNS requests that are
1929	sent to the DNS server.	2241	sent to the DNS server.
1930		2242
		2243	=item C<PERL_ANYEVENT_MAX_SIGNAL_LATENCY>
		2244
		2245	Perl has inherently racy signal handling (you can basically choose between
		2246	losing signals and memory corruption) - pure perl event loops (including
		2247	C<AnyEvent::Loop>, when C<Async::Interrupt> isn't available) therefore
		2248	have to poll regularly to avoid losing signals.
		2249
		2250	Some event loops are racy, but don't poll regularly, and some event loops
		2251	are written in C but are still racy. For those event loops, AnyEvent
		2252	installs a timer that regularly wakes up the event loop.
		2253
		2254	By default, the interval for this timer is C<10> seconds, but you can
		2255	override this delay with this environment variable (or by setting
		2256	the C<$AnyEvent::MAX_SIGNAL_LATENCY> variable before creating signal
		2257	watchers).
		2258
		2259	Lower values increase CPU (and energy) usage, higher values can introduce
		2260	long delays when reaping children or waiting for signals.
		2261
		2262	The L<AnyEvent::Async> module, if available, will be used to avoid this
		2263	polling (with most event loops).
		2264
1931	=item C<PERL_ANYEVENT_RESOLV_CONF>	2265	=item C<PERL_ANYEVENT_RESOLV_CONF>
1932		2266
1933	The file to use instead of F</etc/resolv.conf> (or OS-specific	2267	The absolute path to a F<resolv.conf>-style file to use instead of
1934	configuration) in the default resolver. When set to the empty string, no	2268	F</etc/resolv.conf> (or the OS-specific configuration) in the default
1935	default config will be used.	2269	resolver, or the empty string to select the default configuration.
1936		2270
1937	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.	2271	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.
1938		2272
1939	When neither C<ca_file> nor C<ca_path> was specified during	2273	When neither C<ca_file> nor C<ca_path> was specified during
1940	L<AnyEvent::TLS> context creation, and either of these environment	2274	L<AnyEvent::TLS> context creation, and either of these environment
1941	variables exist, they will be used to specify CA certificate locations	2275	variables are nonempty, they will be used to specify CA certificate
1942	instead of a system-dependent default.	2276	locations instead of a system-dependent default.
1943		2277
1944	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>	2278	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>
1945		2279
1946	When these are set to C<1>, then the respective modules are not	2280	When these are set to C<1>, then the respective modules are not
1947	loaded. Mostly good for testing AnyEvent itself.	2281	loaded. Mostly good for testing AnyEvent itself.
…		…
2279	(even when used without AnyEvent), but most event loops have acceptable	2613	(even when used without AnyEvent), but most event loops have acceptable
2280	performance with or without AnyEvent.	2614	performance with or without AnyEvent.
2281		2615
2282	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2616	=item * The overhead AnyEvent adds is usually much smaller than the overhead of
2283	the actual event loop, only with extremely fast event loops such as EV	2617	the actual event loop, only with extremely fast event loops such as EV
2284	adds AnyEvent significant overhead.	2618	does AnyEvent add significant overhead.
2285		2619
2286	=item * You should avoid POE like the plague if you want performance or	2620	=item * You should avoid POE like the plague if you want performance or
2287	reasonable memory usage.	2621	reasonable memory usage.
2288		2622
2289	=back	2623	=back
…		…
2588		2922
2589	=item L<Time::HiRes>	2923	=item L<Time::HiRes>
2590		2924
2591	This module is part of perl since release 5.008. It will be used when the	2925	This module is part of perl since release 5.008. It will be used when the
2592	chosen event library does not come with a timing source of its own. The	2926	chosen event library does not come with a timing source of its own. The
2593	pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to	2927	pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2594	try to use a monotonic clock for timing stability.	2928	try to use a monotonic clock for timing stability.
2595		2929
2596	=back	2930	=back
2597		2931
2598		2932
…		…
2664		2998
2665	Tutorial/Introduction: L<AnyEvent::Intro>.	2999	Tutorial/Introduction: L<AnyEvent::Intro>.
2666		3000
2667	FAQ: L<AnyEvent::FAQ>.	3001	FAQ: L<AnyEvent::FAQ>.
2668		3002
2669	Utility functions: L<AnyEvent::Util>.	3003	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		3004	(simply logging).
2670		3005
2671	Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>,	3006	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
2672	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	3007	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		3008
		3009	Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>,
		3010	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		3011	L<Qt>, L<POE>, L<FLTK>.
2673		3012
2674	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	3013	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2675	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	3014	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2676	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	3015	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2677	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	3016	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		3017	L<AnyEvent::Impl::FLTK>.
2678		3018
2679	Non-blocking file handles, sockets, TCP clients and	3019	Non-blocking handles, pipes, stream sockets, TCP clients and
2680	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	3020	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2681		3021
		3022	Asynchronous File I/O: L<AnyEvent::IO>.
		3023
2682	Asynchronous DNS: L<AnyEvent::DNS>.	3024	Asynchronous DNS: L<AnyEvent::DNS>.
2683		3025
2684	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV L<Coro::Event >,	3026	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
2685		3027
2686	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,	3028	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,
2687	L<AnyEvent::HTTP>.	3029	L<AnyEvent::HTTP>.
2688		3030
2689		3031
2690	=head1 AUTHOR	3032	=head1 AUTHOR
2691		3033
2692	Marc Lehmann <schmorp@schmorp.de>	3034	Marc Lehmann <schmorp@schmorp.de>
2693	http://home.schmorp.de/	3035	http://anyevent.schmorp.de
2694		3036
2695	=cut	3037	=cut
2696		3038
2697	1	3039	1
2698		3040

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.334 by root, Tue Oct 12 06:51:15 2010 UTC vs. Revision 1.408 by root, Thu Dec 6 12:04:23 2012 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.334 by root, Tue Oct 12 06:51:15 2010 UTC vs.
Revision 1.408 by root, Thu Dec 6 12:04:23 2012 UTC