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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.330 by root, Tue Aug 31 00:59:55 2010 UTC vs.
Revision 1.365 by root, Tue Aug 16 14:47:26 2011 UTC

…		…
46	in a tutorial or some gentle introduction, have a look at the	46	in a tutorial or some gentle introduction, have a look at the
47	L<AnyEvent::Intro> manpage.	47	L<AnyEvent::Intro> manpage.
48		48
49	=head1 SUPPORT	49	=head1 SUPPORT
50		50
		51	An FAQ document is available as L<AnyEvent::FAQ>.
		52
51	There is a mailinglist for discussing all things AnyEvent, and an IRC	53	There also is a mailinglist for discussing all things AnyEvent, and an IRC
52	channel, too.	54	channel, too.
53		55
54	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software	56	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software
55	Repository>, at L<http://anyevent.schmorp.de>, for more info.	57	Repository>, at L<http://anyevent.schmorp.de>, for more info.
56		58
…		…
83	that isn't them. What's worse, all the potential users of your	85	that isn't them. What's worse, all the potential users of your
84	module are I<also> forced to use the same event loop you use.	86	module are I<also> forced to use the same event loop you use.
85		87
86	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works	88	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works
87	fine. AnyEvent + Tk works fine etc. etc. but none of these work together	89	fine. AnyEvent + Tk works fine etc. etc. but none of these work together
88	with the rest: POE + IO::Async? No go. Tk + Event? No go. Again: if	90	with the rest: POE + EV? No go. Tk + Event? No go. Again: if your module
89	your module uses one of those, every user of your module has to use it,	91	uses one of those, every user of your module has to use it, too. But if
90	too. But if your module uses AnyEvent, it works transparently with all	92	your module uses AnyEvent, it works transparently with all event models it
91	event models it supports (including stuff like IO::Async, as long as those	93	supports (including stuff like IO::Async, as long as those use one of the
92	use one of the supported event loops. It is easy to add new event loops	94	supported event loops. It is easy to add new event loops to AnyEvent, too,
93	to AnyEvent, too, so it is future-proof).	95	so it is future-proof).
94		96
95	In addition to being free of having to use I<the one and only true event	97	In addition to being free of having to use I<the one and only true event
96	model>, AnyEvent also is free of bloat and policy: with POE or similar	98	model>, AnyEvent also is free of bloat and policy: with POE or similar
97	modules, you get an enormous amount of code and strict rules you have to	99	modules, you get an enormous amount of code and strict rules you have to
98	follow. AnyEvent, on the other hand, is lean and to the point, by only	100	follow. AnyEvent, on the other hand, is lean and to the point, by only
…		…
119	The interface itself is vaguely similar, but not identical to the L<Event>	121	The interface itself is vaguely similar, but not identical to the L<Event>
120	module.	122	module.
121		123
122	During the first call of any watcher-creation method, the module tries	124	During the first call of any watcher-creation method, the module tries
123	to detect the currently loaded event loop by probing whether one of the	125	to detect the currently loaded event loop by probing whether one of the
124	following modules is already loaded: L<EV>,	126	following modules is already loaded: L<EV>, L<AnyEvent::Loop>,
125	L<Event>, L<Glib>, L<AnyEvent::Impl::Perl>, L<Tk>, L<Event::Lib>, L<Qt>,	127	L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one
126	L<POE>. The first one found is used. If none are found, the module tries	128	found is used. If none are detected, the module tries to load the first
127	to load these modules (excluding Tk, Event::Lib, Qt and POE as the pure perl	129	four modules in the order given; but note that if L<EV> is not
128	adaptor should always succeed) in the order given. The first one that can	130	available, the pure-perl L<AnyEvent::Loop> should always work, so
129	be successfully loaded will be used. If, after this, still none could be	131	the other two are not normally tried.
130	found, AnyEvent will fall back to a pure-perl event loop, which is not
131	very efficient, but should work everywhere.
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:
136		136
…		…
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
…		…
482	thing in an AnyEvent program, you I<have> to create at least one	482	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	483	watcher before you C<fork> the child (alternatively, you can call
484	C<AnyEvent::detect>).	484	C<AnyEvent::detect>).
485		485
486	As most event loops do not support waiting for child events, they will be	486	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	487	emulated by AnyEvent in most cases, in which case the latency and race
488	mentioned in the description of signal watchers apply.	488	problems mentioned in the description of signal watchers apply.
489		489
490	Example: fork a process and wait for it	490	Example: fork a process and wait for it
491		491
492	my $done = AnyEvent->condvar;	492	my $done = AnyEvent->condvar;
493		493
…		…
860	use. If EV is not installed, then AnyEvent will fall back to its own	860	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	861	pure-perl implementation, which is available everywhere as it comes with
862	AnyEvent itself.	862	AnyEvent itself.
863		863
864	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	864	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
865	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	865	AnyEvent::Impl::Perl pure-perl AnyEvent::Loop, fast and portable.
866		866
867	=item Backends that are transparently being picked up when they are used.	867	=item Backends that are transparently being picked up when they are used.
868		868
869	These will be used if they are already loaded when the first watcher	869	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	870	is created, in which case it is assumed that the application is using
…		…
876	AnyEvent::Impl::Glib based on Glib, slow but very stable.	876	AnyEvent::Impl::Glib based on Glib, slow but very stable.
877	AnyEvent::Impl::Tk based on Tk, very broken.	877	AnyEvent::Impl::Tk based on Tk, very broken.
878	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	878	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
879	AnyEvent::Impl::POE based on POE, very slow, some limitations.	879	AnyEvent::Impl::POE based on POE, very slow, some limitations.
880	AnyEvent::Impl::Irssi used when running within irssi.	880	AnyEvent::Impl::Irssi used when running within irssi.
		881	AnyEvent::Impl::IOAsync based on IO::Async.
		882	AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.
		883	AnyEvent::Impl::FLTK2 based on FLTK (fltk 2 binding).
881		884
882	=item Backends with special needs.	885	=item Backends with special needs.
883		886
884	Qt requires the Qt::Application to be instantiated first, but will	887	Qt requires the Qt::Application to be instantiated first, but will
885	otherwise be picked up automatically. As long as the main program	888	otherwise be picked up automatically. As long as the main program
886	instantiates the application before any AnyEvent watchers are created,	889	instantiates the application before any AnyEvent watchers are created,
887	everything should just work.	890	everything should just work.
888		891
889	AnyEvent::Impl::Qt based on Qt.	892	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		893
899	=item Event loops that are indirectly supported via other backends.	894	=item Event loops that are indirectly supported via other backends.
900		895
901	Some event loops can be supported via other modules:	896	Some event loops can be supported via other modules:
902		897
…		…
938		933
939	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model	934	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model
940	if necessary. You should only call this function right before you would	935	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	936	have created an AnyEvent watcher anyway, that is, as late as possible at
942	runtime, and not e.g. during initialisation of your module.	937	runtime, and not e.g. during initialisation of your module.
		938
		939	The effect of calling this function is as if a watcher had been created
		940	(specifically, actions that happen "when the first watcher is created"
		941	happen when calling detetc as well).
943		942
944	If you need to do some initialisation before AnyEvent watchers are	943	If you need to do some initialisation before AnyEvent watchers are
945	created, use C<post_detect>.	944	created, use C<post_detect>.
946		945
947	=item $guard = AnyEvent::post_detect { BLOCK }	946	=item $guard = AnyEvent::post_detect { BLOCK }
…		…
1010	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent	1009	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1011	# as soon as it is	1010	# as soon as it is
1012	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };	1011	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1013	}	1012	}
1014		1013
		1014	=item AnyEvent::postpone { BLOCK }
		1015
		1016	Arranges for the block to be executed as soon as possible, but not before
		1017	the call itself returns. In practise, the block will be executed just
		1018	before the event loop polls for new events, or shortly afterwards.
		1019
		1020	This function never returns anything (to make the C<return postpone { ...
		1021	}> idiom more useful.
		1022
		1023	To understand the usefulness of this function, consider a function that
		1024	asynchronously does something for you and returns some transaction
		1025	object or guard to let you cancel the operation. For example,
		1026	C<AnyEvent::Socket::tcp_connect>:
		1027
		1028	# start a conenction attempt unless one is active
		1029	$self->{connect_guard} \|\|= AnyEvent::Socket::tcp_connect "www.example.net", 80, sub {
		1030	delete $self->{connect_guard};
		1031	...
		1032	};
		1033
		1034	Imagine that this function could instantly call the callback, for
		1035	example, because it detects an obvious error such as a negative port
		1036	number. Invoking the callback before the function returns causes problems
		1037	however: the callback will be called and will try to delete the guard
		1038	object. But since the function hasn't returned yet, there is nothing to
		1039	delete. When the function eventually returns it will assign the guard
		1040	object to C<< $self->{connect_guard} >>, where it will likely never be
		1041	deleted, so the program thinks it is still trying to connect.
		1042
		1043	This is where C<AnyEvent::postpone> should be used. Instead of calling the
		1044	callback directly on error:
		1045
		1046	$cb->(undef), return # signal error to callback, BAD!
		1047	if $some_error_condition;
		1048
		1049	It should use C<postpone>:
		1050
		1051	AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later
		1052	if $some_error_condition;
		1053
		1054	=item AnyEvent::log $level, $msg[, @args]
		1055
		1056	Log the given C<$msg> at the given C<$level>.
		1057
		1058	Loads AnyEvent::Log on first use and calls C<AnyEvent::Log::log> -
		1059	consequently, look at the L<AnyEvent::Log> documentation for details.
		1060
1015	=back	1061	=back
1016		1062
1017	=head1 WHAT TO DO IN A MODULE	1063	=head1 WHAT TO DO IN A MODULE
1018		1064
1019	As a module author, you should C<use AnyEvent> and call AnyEvent methods	1065	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	1098	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	1099	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.	1100	might choose the wrong one unless you load the correct one yourself.
1055		1101
1056	You can chose to use a pure-perl implementation by loading the	1102	You can chose to use a pure-perl implementation by loading the
1057	C<AnyEvent::Impl::Perl> module, which gives you similar behaviour	1103	C<AnyEvent::Loop> module, which gives you similar behaviour
1058	everywhere, but letting AnyEvent chose the model is generally better.	1104	everywhere, but letting AnyEvent chose the model is generally better.
1059		1105
1060	=head2 MAINLOOP EMULATION	1106	=head2 MAINLOOP EMULATION
1061		1107
1062	Sometimes (often for short test scripts, or even standalone programs who	1108	Sometimes (often for short test scripts, or even standalone programs who
…		…
1157		1203
1158	package AnyEvent;	1204	package AnyEvent;
1159		1205
1160	# basically a tuned-down version of common::sense	1206	# basically a tuned-down version of common::sense
1161	sub common_sense {	1207	sub common_sense {
1162	# from common:.sense 1.0	1208	# from common:.sense 3.4
1163	${^WARNING_BITS} = "\xfc\x3f\x33\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x00";	1209	${^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)	1210	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1165	$^H \|= 0x00000600;	1211	$^H \|= 0x00000600;
1166	}	1212	}
1167		1213
1168	BEGIN { AnyEvent::common_sense }	1214	BEGIN { AnyEvent::common_sense }
1169		1215
1170	use Carp ();	1216	use Carp ();
1171		1217
1172	our $VERSION = '5.271';	1218	our $VERSION = '6.01';
1173	our $MODEL;	1219	our $MODEL;
1174		1220
1175	our $AUTOLOAD;
1176	our @ISA;	1221	our @ISA;
1177		1222
1178	our @REGISTRY;	1223	our @REGISTRY;
1179		1224
1180	our $VERBOSE;	1225	our $VERBOSE;
…		…
1186		1231
1187	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1232	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1188	if ${^TAINT};	1233	if ${^TAINT};
1189		1234
1190	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1235	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;
1191
1192	}	1236	}
1193		1237
1194	our $MAX_SIGNAL_LATENCY = 10;	1238	our $MAX_SIGNAL_LATENCY = 10;
1195		1239
1196	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred	1240	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
…		…
1200	$PROTOCOL{$_} = ++$idx	1244	$PROTOCOL{$_} = ++$idx
1201	for reverse split /\s,\s/,	1245	for reverse split /\s,\s/,
1202	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1246	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1203	}	1247	}
1204		1248
		1249	our @post_detect;
		1250
		1251	sub post_detect(&) {
		1252	my ($cb) = @_;
		1253
		1254	push @post_detect, $cb;
		1255
		1256	defined wantarray
		1257	? bless \$cb, "AnyEvent::Util::postdetect"
		1258	: ()
		1259	}
		1260
		1261	sub AnyEvent::Util::postdetect::DESTROY {
		1262	@post_detect = grep $_ != ${$_[0]}, @post_detect;
		1263	}
		1264
		1265	our $POSTPONE_W;
		1266	our @POSTPONE;
		1267
		1268	sub _postpone_exec {
		1269	undef $POSTPONE_W;
		1270
		1271	&{ shift @POSTPONE }
		1272	while @POSTPONE;
		1273	}
		1274
		1275	sub postpone(&) {
		1276	push @POSTPONE, shift;
		1277
		1278	$POSTPONE_W \|\|= AE::timer (0, 0, \&_postpone_exec);
		1279
		1280	()
		1281	}
		1282
		1283	sub log($$;@) {
		1284	require AnyEvent::Log;
		1285	# AnyEvent::Log overwrites this function
		1286	goto &log;
		1287	}
		1288
1205	my @models = (	1289	our @models = (
1206	[EV:: => AnyEvent::Impl::EV:: , 1],	1290	[EV:: => AnyEvent::Impl::EV:: , 1],
1207	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1291	[AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],
1208	# everything below here will not (normally) be autoprobed	1292	# everything below here will not (normally) be autoprobed
1209	# as the pureperl backend should work everywhere	1293	# as the pure perl backend should work everywhere
1210	# and is usually faster	1294	# and is usually faster
1211	[Event:: => AnyEvent::Impl::Event::, 1],	1295	[Event:: => AnyEvent::Impl::Event::, 1],
1212	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1296	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1213	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1297	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1214	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package	1298	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1215	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1299	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1216	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1300	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1217	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1301	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1218	[Wx:: => AnyEvent::Impl::POE::],	1302	[Wx:: => AnyEvent::Impl::POE::],
1219	[Prima:: => AnyEvent::Impl::POE::],	1303	[Prima:: => AnyEvent::Impl::POE::],
1220	# IO::Async is just too broken - we would need workarounds for its	1304	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1221	# byzantine signal and broken child handling, among others.	1305	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1222	# IO::Async is rather hard to detect, as it doesn't have any	1306	[FLTK:: => AnyEvent::Impl::FLTK2::],
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	);	1307	);
1229		1308
1230	our %method = map +($_ => 1),	1309	our @isa_hook;
		1310
		1311	sub _isa_set {
		1312	my @pkg = ("AnyEvent", (map $_->[0], grep defined, @isa_hook), $MODEL);
		1313
		1314	@{"$pkg[$_-1]::ISA"} = $pkg[$_]
		1315	for 1 .. $#pkg;
		1316
		1317	grep $_ && $_->[1], @isa_hook
		1318	and AE::_reset ();
		1319	}
		1320
		1321	# used for hooking AnyEvent::Strict and AnyEvent::Debug::Wrap into the class hierarchy
		1322	sub _isa_hook($$;$) {
		1323	my ($i, $pkg, $reset_ae) = @_;
		1324
		1325	$isa_hook[$i] = $pkg ? [$pkg, $reset_ae] : undef;
		1326
		1327	_isa_set;
		1328	}
		1329
		1330	# all autoloaded methods reserve the complete glob, not just the method slot.
		1331	# due to bugs in perls method cache implementation.
1231	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1332	our @methods = qw(io timer time now now_update signal child idle condvar);
1232
1233	our @post_detect;
1234
1235	sub post_detect(&) {
1236	my ($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		1333
1249	sub detect() {	1334	sub detect() {
		1335	return $MODEL if $MODEL; # some programs keep references to detect
		1336
		1337	local $!; # for good measure
		1338	local $SIG{__DIE__}; # we use eval
		1339
1250	# free some memory	1340	# free some memory
1251	*detect = sub () { $MODEL };	1341	*detect = sub () { $MODEL };
		1342	# undef &func doesn't correctly update the method cache. grmbl.
		1343	# so we delete the whole glob. grmbl.
		1344	# otoh, perl doesn't let me undef an active usb, but it lets me free
		1345	# a glob with an active sub. hrm. i hope it works, but perl is
		1346	# usually buggy in this department. sigh.
		1347	delete @{"AnyEvent::"}{@methods};
		1348	undef @methods;
1252		1349
1253	local $!; # for good measure
1254	local $SIG{__DIE__};
1255
1256	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1350	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1257	my $model = "AnyEvent::Impl::$1";	1351	my $model = $1;
		1352	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1258	if (eval "require $model") {	1353	if (eval "require $model") {
1259	$MODEL = $model;	1354	$MODEL = $model;
1260	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;	1355	AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it."
		1356	if $VERBOSE >= 7;
1261	} else {	1357	} else {
1262	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1358	AnyEvent::log warn => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1263	}	1359	}
1264	}	1360	}
1265		1361
1266	# check for already loaded models	1362	# check for already loaded models
1267	unless ($MODEL) {	1363	unless ($MODEL) {
1268	for (@REGISTRY, @models) {	1364	for (@REGISTRY, @models) {
1269	my ($package, $model) = @$_;	1365	my ($package, $model) = @$_;
1270	if (${"$package\::VERSION"} > 0) {	1366	if (${"$package\::VERSION"} > 0) {
1271	if (eval "require $model") {	1367	if (eval "require $model") {
1272	$MODEL = $model;	1368	$MODEL = $model;
1273	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;	1369	AnyEvent::log 7 => "autodetected model '$model', using it."
		1370	if $VERBOSE >= 7;
1274	last;	1371	last;
1275	}	1372	}
1276	}	1373	}
1277	}	1374	}
1278		1375
…		…
1285	and eval "require $package"	1382	and eval "require $package"
1286	and ${"$package\::VERSION"} > 0	1383	and ${"$package\::VERSION"} > 0
1287	and eval "require $model"	1384	and eval "require $model"
1288	) {	1385	) {
1289	$MODEL = $model;	1386	$MODEL = $model;
1290	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;	1387	AnyEvent::log 7 => "autoloaded model '$model', using it."
		1388	if $VERBOSE >= 7;
1291	last;	1389	last;
1292	}	1390	}
1293	}	1391	}
1294		1392
1295	$MODEL	1393	$MODEL
1296	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";	1394	or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?";
1297	}	1395	}
1298	}	1396	}
1299		1397
1300	@models = (); # free probe data	1398	# free memory only needed for probing
		1399	undef @models;
		1400	undef @REGISTRY;
1301		1401
1302	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1402	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1303	unshift @ISA, $MODEL;
1304		1403
1305	# now nuke some methods that are overriden by the backend.	1404	# now nuke some methods that are overridden by the backend.
1306	# SUPER is not allowed.	1405	# SUPER usage is not allowed in these.
1307	for (qw(time signal child idle)) {	1406	for (qw(time signal child idle)) {
1308	undef &{"AnyEvent::Base::$_"}	1407	undef &{"AnyEvent::Base::$_"}
1309	if defined &{"$MODEL\::$_"};	1408	if defined &{"$MODEL\::$_"};
1310	}	1409	}
1311		1410
1312	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};	1411	_isa_set;
		1412
		1413	if ($ENV{PERL_ANYEVENT_STRICT}) {
		1414	require AnyEvent::Strict;
		1415	}
		1416
		1417	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1418	require AnyEvent::Debug;
		1419	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1420	}
		1421
		1422	if (exists $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1423	require AnyEvent::Socket;
		1424	require AnyEvent::Debug;
		1425
		1426	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1427	$shell =~ s/\$\$/$$/g;
		1428
		1429	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1430	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1431	}
1313		1432
1314	(shift @post_detect)->() while @post_detect;	1433	(shift @post_detect)->() while @post_detect;
		1434	undef @post_detect;
1315		1435
1316	*post_detect = sub(&) {	1436	*post_detect = sub(&) {
1317	shift->();	1437	shift->();
1318		1438
1319	undef	1439	undef
1320	};	1440	};
1321		1441
1322	$MODEL	1442	$MODEL
1323	}	1443	}
1324		1444
1325	sub AUTOLOAD {	1445	for my $name (@methods) {
1326	(my $func = $AUTOLOAD) =~ s/.*://;	1446	*$name = sub {
1327
1328	$method{$func}
1329	or Carp::croak "$func: not a valid AnyEvent class method";
1330
1331	detect;	1447	detect;
1332		1448	# we use goto because
1333	my $class = shift;	1449	# a) it makes the thunk more transparent
1334	$class->$func (@_);	1450	# b) it allows us to delete the thunk later
		1451	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
		1452	};
1335	}	1453	}
1336		1454
1337	# utility function to dup a filehandle. this is used by many backends	1455	# utility function to dup a filehandle. this is used by many backends
1338	# to support binding more than one watcher per filehandle (they usually	1456	# to support binding more than one watcher per filehandle (they usually
1339	# allow only one watcher per fd, so we dup it to get a different one).	1457	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1363		1481
1364	package AE;	1482	package AE;
1365		1483
1366	our $VERSION = $AnyEvent::VERSION;	1484	our $VERSION = $AnyEvent::VERSION;
1367		1485
		1486	sub _reset() {
		1487	eval q{
1368	# fall back to the main API by default - backends and AnyEvent::Base	1488	# fall back to the main API by default - backends and AnyEvent::Base
1369	# implementations can overwrite these.	1489	# implementations can overwrite these.
1370		1490
1371	sub io($$$) {	1491	sub io($$$) {
1372	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1492	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1373	}	1493	}
1374		1494
1375	sub timer($$$) {	1495	sub timer($$$) {
1376	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1496	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1377	}	1497	}
1378		1498
1379	sub signal($$) {	1499	sub signal($$) {
1380	AnyEvent->signal (signal => $_[0], cb => $_[1])	1500	AnyEvent->signal (signal => $_[0], cb => $_[1])
1381	}	1501	}
1382		1502
1383	sub child($$) {	1503	sub child($$) {
1384	AnyEvent->child (pid => $_[0], cb => $_[1])	1504	AnyEvent->child (pid => $_[0], cb => $_[1])
1385	}	1505	}
1386		1506
1387	sub idle($) {	1507	sub idle($) {
1388	AnyEvent->idle (cb => $_[0])	1508	AnyEvent->idle (cb => $_[0]);
1389	}	1509	}
1390		1510
1391	sub cv(;&) {	1511	sub cv(;&) {
1392	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1512	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1393	}	1513	}
1394		1514
1395	sub now() {	1515	sub now() {
1396	AnyEvent->now	1516	AnyEvent->now
1397	}	1517	}
1398		1518
1399	sub now_update() {	1519	sub now_update() {
1400	AnyEvent->now_update	1520	AnyEvent->now_update
1401	}	1521	}
1402		1522
1403	sub time() {	1523	sub time() {
1404	AnyEvent->time	1524	AnyEvent->time
		1525	}
		1526
		1527	*postpone = \&AnyEvent::postpone;
		1528	*log = \&AnyEvent::log;
		1529	};
		1530	die if $@;
1405	}	1531	}
		1532
		1533	BEGIN { _reset }
1406		1534
1407	package AnyEvent::Base;	1535	package AnyEvent::Base;
1408		1536
1409	# default implementations for many methods	1537	# default implementations for many methods
1410		1538
1411	sub time {	1539	sub time {
1412	eval q{ # poor man's autoloading {}	1540	eval q{ # poor man's autoloading {}
1413	# probe for availability of Time::HiRes	1541	# probe for availability of Time::HiRes
1414	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1542	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1415	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1543	AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy."
		1544	if $AnyEvent::VERBOSE >= 8;
		1545	*time = sub { Time::HiRes::time () };
1416	*AE::time = \&Time::HiRes::time;	1546	*AE::time = \& Time::HiRes::time ;
1417	# if (eval "use POSIX (); (POSIX::times())...	1547	# if (eval "use POSIX (); (POSIX::times())...
1418	} else {	1548	} else {
1419	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1549	AnyEvent::log critical => "using built-in time(), WARNING, no sub-second resolution!";
		1550	*time = sub { CORE::time };
1420	*AE::time = sub (){ time }; # epic fail	1551	*AE::time = sub (){ CORE::time };
1421	}	1552	}
1422		1553
1423	*time = sub { AE::time }; # different prototypes	1554	*now = \&time;
1424	};	1555	};
1425	die if $@;	1556	die if $@;
1426		1557
1427	&time	1558	&time
1428	}	1559	}
1429		1560
1430	*now = \&time;	1561	*now = \&time;
1431
1432	sub now_update { }	1562	sub now_update { }
1433		1563
		1564	sub _poll {
		1565	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
		1566	}
		1567
1434	# default implementation for ->condvar	1568	# default implementation for ->condvar
		1569	# in fact, the default should not be overwritten
1435		1570
1436	sub condvar {	1571	sub condvar {
1437	eval q{ # poor man's autoloading {}	1572	eval q{ # poor man's autoloading {}
1438	*condvar = sub {	1573	*condvar = sub {
1439	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1574	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
…		…
1517		1652
1518	sub signal {	1653	sub signal {
1519	eval q{ # poor man's autoloading {}	1654	eval q{ # poor man's autoloading {}
1520	# probe for availability of Async::Interrupt	1655	# probe for availability of Async::Interrupt
1521	if (_have_async_interrupt) {	1656	if (_have_async_interrupt) {
1522	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1657	AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling."
		1658	if $AnyEvent::VERBOSE >= 8;
1523		1659
1524	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1660	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1525	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1661	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1526		1662
1527	} else {	1663	} else {
1528	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1664	AnyEvent::log 8 => "using emulated perl signal handling with latency timer."
		1665	if $AnyEvent::VERBOSE >= 8;
1529		1666
1530	if (AnyEvent::WIN32) {	1667	if (AnyEvent::WIN32) {
1531	require AnyEvent::Util;	1668	require AnyEvent::Util;
1532		1669
1533	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1670	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1609	: sysread $SIGPIPE_R, (my $dummy), 9;	1746	: sysread $SIGPIPE_R, (my $dummy), 9;
1610		1747
1611	while (%SIG_EV) {	1748	while (%SIG_EV) {
1612	for (keys %SIG_EV) {	1749	for (keys %SIG_EV) {
1613	delete $SIG_EV{$_};	1750	delete $SIG_EV{$_};
1614	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1751	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1615	}	1752	}
1616	}	1753	}
1617	};	1754	};
1618	};	1755	};
1619	die if $@;	1756	die if $@;
…		…
1624	# default implementation for ->child	1761	# default implementation for ->child
1625		1762
1626	our %PID_CB;	1763	our %PID_CB;
1627	our $CHLD_W;	1764	our $CHLD_W;
1628	our $CHLD_DELAY_W;	1765	our $CHLD_DELAY_W;
1629	our $WNOHANG;
1630		1766
1631	# used by many Impl's	1767	# used by many Impl's
1632	sub _emit_childstatus($$) {	1768	sub _emit_childstatus($$) {
1633	my (undef, $rpid, $rstatus) = @_;	1769	my (undef, $rpid, $rstatus) = @_;
1634		1770
…		…
1641	eval q{ # poor man's autoloading {}	1777	eval q{ # poor man's autoloading {}
1642	*_sigchld = sub {	1778	*_sigchld = sub {
1643	my $pid;	1779	my $pid;
1644		1780
1645	AnyEvent->_emit_childstatus ($pid, $?)	1781	AnyEvent->_emit_childstatus ($pid, $?)
1646	while ($pid = waitpid -1, $WNOHANG) > 0;	1782	while ($pid = waitpid -1, WNOHANG) > 0;
1647	};	1783	};
1648		1784
1649	*child = sub {	1785	*child = sub {
1650	my (undef, %arg) = @_;	1786	my (undef, %arg) = @_;
1651		1787
1652	defined (my $pid = $arg{pid} + 0)	1788	my $pid = $arg{pid};
1653	or Carp::croak "required option 'pid' is missing";	1789	my $cb = $arg{cb};
1654		1790
1655	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1791	$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		1792
1662	unless ($CHLD_W) {	1793	unless ($CHLD_W) {
1663	$CHLD_W = AE::signal CHLD => \&_sigchld;	1794	$CHLD_W = AE::signal CHLD => \&_sigchld;
1664	# child could be a zombie already, so make at least one round	1795	# child could be a zombie already, so make at least one round
1665	&_sigchld;	1796	&_sigchld;
1666	}	1797	}
1667		1798
1668	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1799	bless [$pid, $cb+0], "AnyEvent::Base::child"
1669	};	1800	};
1670		1801
1671	*AnyEvent::Base::child::DESTROY = sub {	1802	*AnyEvent::Base::child::DESTROY = sub {
1672	my ($pid, $cb) = @{$_[0]};	1803	my ($pid, $icb) = @{$_[0]};
1673		1804
1674	delete $PID_CB{$pid}{$cb};	1805	delete $PID_CB{$pid}{$icb};
1675	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1806	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1676		1807
1677	undef $CHLD_W unless keys %PID_CB;	1808	undef $CHLD_W unless keys %PID_CB;
1678	};	1809	};
1679	};	1810	};
…		…
1692		1823
1693	my ($cb, $w, $rcb) = $arg{cb};	1824	my ($cb, $w, $rcb) = $arg{cb};
1694		1825
1695	$rcb = sub {	1826	$rcb = sub {
1696	if ($cb) {	1827	if ($cb) {
1697	$w = _time;	1828	$w = AE::time;
1698	&$cb;	1829	&$cb;
1699	$w = _time - $w;	1830	$w = AE::time - $w;
1700		1831
1701	# never use more then 50% of the time for the idle watcher,	1832	# never use more then 50% of the time for the idle watcher,
1702	# within some limits	1833	# within some limits
1703	$w = 0.0001 if $w < 0.0001;	1834	$w = 0.0001 if $w < 0.0001;
1704	$w = 5 if $w > 5;	1835	$w = 5 if $w > 5;
…		…
1727		1858
1728	package AnyEvent::CondVar;	1859	package AnyEvent::CondVar;
1729		1860
1730	our @ISA = AnyEvent::CondVar::Base::;	1861	our @ISA = AnyEvent::CondVar::Base::;
1731		1862
		1863	# only to be used for subclassing
		1864	sub new {
		1865	my $class = shift;
		1866	bless AnyEvent->condvar (@_), $class
		1867	}
		1868
1732	package AnyEvent::CondVar::Base;	1869	package AnyEvent::CondVar::Base;
1733		1870
1734	#use overload	1871	#use overload
1735	# '&{}' => sub { my $self = shift; sub { $self->send (@_) } },	1872	# '&{}' => sub { my $self = shift; sub { $self->send (@_) } },
1736	# fallback => 1;	1873	# fallback => 1;
…		…
1745		1882
1746	sub _send {	1883	sub _send {
1747	# nop	1884	# nop
1748	}	1885	}
1749		1886
		1887	sub _wait {
		1888	AnyEvent->_poll until $_[0]{_ae_sent};
		1889	}
		1890
1750	sub send {	1891	sub send {
1751	my $cv = shift;	1892	my $cv = shift;
1752	$cv->{_ae_sent} = [@_];	1893	$cv->{_ae_sent} = [@_];
1753	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};	1894	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1754	$cv->_send;	1895	$cv->_send;
…		…
1761		1902
1762	sub ready {	1903	sub ready {
1763	$_[0]{_ae_sent}	1904	$_[0]{_ae_sent}
1764	}	1905	}
1765		1906
1766	sub _wait {
1767	$WAITING
1768	and !$_[0]{_ae_sent}
1769	and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1770
1771	local $WAITING = 1;
1772	AnyEvent->one_event while !$_[0]{_ae_sent};
1773	}
1774
1775	sub recv {	1907	sub recv {
		1908	unless ($_[0]{_ae_sent}) {
		1909	$WAITING
		1910	and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
		1911
		1912	local $WAITING = 1;
1776	$_[0]->_wait;	1913	$_[0]->_wait;
		1914	}
1777		1915
1778	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1916	$_[0]{_ae_croak}
1779	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1917	and Carp::croak $_[0]{_ae_croak};
		1918
		1919	wantarray
		1920	? @{ $_[0]{_ae_sent} }
		1921	: $_[0]{_ae_sent}[0]
1780	}	1922	}
1781		1923
1782	sub cb {	1924	sub cb {
1783	my $cv = shift;	1925	my $cv = shift;
1784		1926
…		…
1800	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };	1942	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };
1801	}	1943	}
1802		1944
1803	# undocumented/compatibility with pre-3.4	1945	# undocumented/compatibility with pre-3.4
1804	*broadcast = \&send;	1946	*broadcast = \&send;
1805	*wait = \&_wait;	1947	*wait = \&recv;
1806		1948
1807	=head1 ERROR AND EXCEPTION HANDLING	1949	=head1 ERROR AND EXCEPTION HANDLING
1808		1950
1809	In general, AnyEvent does not do any error handling - it relies on the	1951	In general, AnyEvent does not do any error handling - it relies on the
1810	caller to do that if required. The L<AnyEvent::Strict> module (see also	1952	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
1837		1979
1838	By default, AnyEvent will be completely silent except in fatal	1980	By default, AnyEvent will be completely silent except in fatal
1839	conditions. You can set this environment variable to make AnyEvent more	1981	conditions. You can set this environment variable to make AnyEvent more
1840	talkative.	1982	talkative.
1841		1983
1842	When set to C<1> or higher, causes AnyEvent to warn about unexpected	1984	When set to C<5> or higher, causes AnyEvent to warn about unexpected
1843	conditions, such as not being able to load the event model specified by	1985	conditions, such as not being able to load the event model specified by
1844	C<PERL_ANYEVENT_MODEL>.	1986	C<PERL_ANYEVENT_MODEL>.
1845		1987
1846	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	1988	When set to C<7> or higher, cause AnyEvent to report to STDERR which event
1847	model it chooses.	1989	model it chooses.
1848		1990
1849	When set to C<8> or higher, then AnyEvent will report extra information on	1991	When set to C<8> or higher, then AnyEvent will report extra information on
1850	which optional modules it loads and how it implements certain features.	1992	which optional modules it loads and how it implements certain features.
1851		1993
…		…
1862	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>	2004	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>
1863	>>, it is definitely recommended to keep it off in production. Keeping	2005	>>, it is definitely recommended to keep it off in production. Keeping
1864	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2006	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1865	can be very useful, however.	2007	can be very useful, however.
1866		2008
		2009	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2010
		2011	If this env variable is set, then its contents will be interpreted by
		2012	C<AnyEvent::Socket::parse_hostport> (after replacing every occurance of
		2013	C<$$> by the process pid) and an C<AnyEvent::Debug::shell> is bound on
		2014	that port. The shell object is saved in C<$AnyEvent::Debug::SHELL>.
		2015
		2016	This takes place when the first watcher is created.
		2017
		2018	For example, to bind a debug shell on a unix domain socket in
		2019	F<< /tmp/debug<pid>.sock >>, you could use this:
		2020
		2021	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2022
		2023	Note that creating sockets in F</tmp> is very unsafe on multiuser
		2024	systems.
		2025
		2026	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2027
		2028	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2029	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2030
1867	=item C<PERL_ANYEVENT_MODEL>	2031	=item C<PERL_ANYEVENT_MODEL>
1868		2032
1869	This can be used to specify the event model to be used by AnyEvent, before	2033	This can be used to specify the event model to be used by AnyEvent, before
1870	auto detection and -probing kicks in. It must be a string consisting	2034	auto detection and -probing kicks in.
1871	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2035
		2036	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2037	or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1872	and the resulting module name is loaded and if the load was successful,	2038	resulting module name is loaded and - if the load was successful - used as
1873	used as event model. If it fails to load AnyEvent will proceed with	2039	event model backend. If it fails to load then AnyEvent will proceed with
1874	auto detection and -probing.	2040	auto detection and -probing.
1875		2041
1876	This functionality might change in future versions.	2042	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2043	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2044	the end of a string designates a module name and quotes it appropriately).
1877		2045
1878	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you	2046	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1879	could start your program like this:	2047	could start your program like this:
1880		2048
1881	PERL_ANYEVENT_MODEL=Perl perl ...	2049	PERL_ANYEVENT_MODEL=Perl perl ...
1882		2050
1883	=item C<PERL_ANYEVENT_PROTOCOLS>	2051	=item C<PERL_ANYEVENT_PROTOCOLS>
…		…
2273	(even when used without AnyEvent), but most event loops have acceptable	2441	(even when used without AnyEvent), but most event loops have acceptable
2274	performance with or without AnyEvent.	2442	performance with or without AnyEvent.
2275		2443
2276	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2444	=item * The overhead AnyEvent adds is usually much smaller than the overhead of
2277	the actual event loop, only with extremely fast event loops such as EV	2445	the actual event loop, only with extremely fast event loops such as EV
2278	adds AnyEvent significant overhead.	2446	does AnyEvent add significant overhead.
2279		2447
2280	=item * You should avoid POE like the plague if you want performance or	2448	=item * You should avoid POE like the plague if you want performance or
2281	reasonable memory usage.	2449	reasonable memory usage.
2282		2450
2283	=back	2451	=back
…		…
2582		2750
2583	=item L<Time::HiRes>	2751	=item L<Time::HiRes>
2584		2752
2585	This module is part of perl since release 5.008. It will be used when the	2753	This module is part of perl since release 5.008. It will be used when the
2586	chosen event library does not come with a timing source of its own. The	2754	chosen event library does not come with a timing source of its own. The
2587	pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to	2755	pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2588	try to use a monotonic clock for timing stability.	2756	try to use a monotonic clock for timing stability.
2589		2757
2590	=back	2758	=back
2591		2759
2592		2760
…		…
2654	pronounced).	2822	pronounced).
2655		2823
2656		2824
2657	=head1 SEE ALSO	2825	=head1 SEE ALSO
2658		2826
2659	Utility functions: L<AnyEvent::Util>.	2827	Tutorial/Introduction: L<AnyEvent::Intro>.
2660		2828
2661	Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>,	2829	FAQ: L<AnyEvent::FAQ>.
2662	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2830
		2831	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		2832	(simply logging).
		2833
		2834	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
		2835	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		2836
		2837	Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>,
		2838	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		2839	L<Qt>, L<POE>, L<FLTK>.
2663		2840
2664	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2841	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2665	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	2842	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2666	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2843	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2667	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	2844	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		2845	L<AnyEvent::Impl::FLTK>.
2668		2846
2669	Non-blocking file handles, sockets, TCP clients and	2847	Non-blocking handles, pipes, stream sockets, TCP clients and
2670	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2848	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2671		2849
2672	Asynchronous DNS: L<AnyEvent::DNS>.	2850	Asynchronous DNS: L<AnyEvent::DNS>.
2673		2851
2674	Coroutine support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>,	2852	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
2675	L<Coro::Event>,
2676		2853
2677	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::XMPP>,	2854	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,
2678	L<AnyEvent::HTTP>.	2855	L<AnyEvent::HTTP>.
2679		2856
2680		2857
2681	=head1 AUTHOR	2858	=head1 AUTHOR
2682		2859

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.330 by root, Tue Aug 31 00:59:55 2010 UTC vs. Revision 1.365 by root, Tue Aug 16 14:47:26 2011 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.330 by root, Tue Aug 31 00:59:55 2010 UTC vs.
Revision 1.365 by root, Tue Aug 16 14:47:26 2011 UTC