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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.332 by root, Tue Aug 31 23:32:40 2010 UTC vs.
Revision 1.366 by root, Wed Aug 17 02:02:38 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>, L<AnyEvent::Impl::Perl>,	126	following modules is already loaded: L<EV>, L<AnyEvent::Loop>,
125	L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one	127	L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one
126	found is used. If none are detected, the module tries to load the first	128	found is used. If none are detected, the module tries to load the first
127	four modules in the order given; but note that if L<EV> is not	129	four modules in the order given; but note that if L<EV> is not
128	available, the pure-perl L<AnyEvent::Impl::Perl> should always work, so	130	available, the pure-perl L<AnyEvent::Loop> should always work, so
129	the other two are not normally tried.	131	the other two are not normally tried.
130		132
131	Because AnyEvent first checks for modules that are already loaded, loading	133	Because AnyEvent first checks for modules that are already loaded, loading
132	an event model explicitly before first using AnyEvent will likely make	134	an event model explicitly before first using AnyEvent will likely make
133	that model the default. For example:	135	that model the default. For example:
…		…
140	The I<likely> means that, if any module loads another event model and	142	The I<likely> means that, if any module loads another event model and
141	starts using it, all bets are off - this case should be very rare though,	143	starts using it, all bets are off - this case should be very rare though,
142	as very few modules hardcode event loops without announcing this very	144	as very few modules hardcode event loops without announcing this very
143	loudly.	145	loudly.
144		146
145	The pure-perl implementation of AnyEvent is called	147	The pure-perl implementation of AnyEvent is called C<AnyEvent::Loop>. Like
146	C<AnyEvent::Impl::Perl>. Like other event modules you can load it	148	other event modules you can load it explicitly and enjoy the high
147	explicitly and enjoy the high availability of that event loop :)	149	availability of that event loop :)
148		150
149	=head1 WATCHERS	151	=head1 WATCHERS
150		152
151	AnyEvent has the central concept of a I<watcher>, which is an object that	153	AnyEvent has the central concept of a I<watcher>, which is an object that
152	stores relevant data for each kind of event you are waiting for, such as	154	stores relevant data for each kind of event you are waiting for, such as
…		…
354	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into	356	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into
355	account.	357	account.
356		358
357	=item AnyEvent->now_update	359	=item AnyEvent->now_update
358		360
359	Some event loops (such as L<EV> or L<AnyEvent::Impl::Perl>) cache	361	Some event loops (such as L<EV> or L<AnyEvent::Loop>) cache the current
360	the current time for each loop iteration (see the discussion of L<<	362	time for each loop iteration (see the discussion of L<< AnyEvent->now >>,
361	AnyEvent->now >>, above).	363	above).
362		364
363	When a callback runs for a long time (or when the process sleeps), then	365	When a callback runs for a long time (or when the process sleeps), then
364	this "current" time will differ substantially from the real time, which	366	this "current" time will differ substantially from the real time, which
365	might affect timers and time-outs.	367	might affect timers and time-outs.
366		368
…		…
480	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
481	watcher before you C<fork> the child (alternatively, you can call	483	watcher before you C<fork> the child (alternatively, you can call
482	C<AnyEvent::detect>).	484	C<AnyEvent::detect>).
483		485
484	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
485	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
486	mentioned in the description of signal watchers apply.	488	problems mentioned in the description of signal watchers apply.
487		489
488	Example: fork a process and wait for it	490	Example: fork a process and wait for it
489		491
490	my $done = AnyEvent->condvar;	492	my $done = AnyEvent->condvar;
491		493
…		…
858	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
859	pure-perl implementation, which is available everywhere as it comes with	861	pure-perl implementation, which is available everywhere as it comes with
860	AnyEvent itself.	862	AnyEvent itself.
861		863
862	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	864	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
863	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	865	AnyEvent::Impl::Perl pure-perl AnyEvent::Loop, fast and portable.
864		866
865	=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.
866		868
867	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
868	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
…		…
874	AnyEvent::Impl::Glib based on Glib, slow but very stable.	876	AnyEvent::Impl::Glib based on Glib, slow but very stable.
875	AnyEvent::Impl::Tk based on Tk, very broken.	877	AnyEvent::Impl::Tk based on Tk, very broken.
876	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	878	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
877	AnyEvent::Impl::POE based on POE, very slow, some limitations.	879	AnyEvent::Impl::POE based on POE, very slow, some limitations.
878	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).
879		884
880	=item Backends with special needs.	885	=item Backends with special needs.
881		886
882	Qt requires the Qt::Application to be instantiated first, but will	887	Qt requires the Qt::Application to be instantiated first, but will
883	otherwise be picked up automatically. As long as the main program	888	otherwise be picked up automatically. As long as the main program
884	instantiates the application before any AnyEvent watchers are created,	889	instantiates the application before any AnyEvent watchers are created,
885	everything should just work.	890	everything should just work.
886		891
887	AnyEvent::Impl::Qt based on Qt.	892	AnyEvent::Impl::Qt based on Qt.
888
889	Support for IO::Async can only be partial, as it is too broken and
890	architecturally limited to even support the AnyEvent API. It also
891	is the only event loop that needs the loop to be set explicitly, so
892	it can only be used by a main program knowing about AnyEvent. See
893	L<AnyEvent::Impl::IOAsync> for the gory details.
894
895	AnyEvent::Impl::IOAsync based on IO::Async, cannot be autoprobed.
896		893
897	=item Event loops that are indirectly supported via other backends.	894	=item Event loops that are indirectly supported via other backends.
898		895
899	Some event loops can be supported via other modules:	896	Some event loops can be supported via other modules:
900		897
…		…
936		933
937	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model	934	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model
938	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
939	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
940	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).
941		942
942	If you need to do some initialisation before AnyEvent watchers are	943	If you need to do some initialisation before AnyEvent watchers are
943	created, use C<post_detect>.	944	created, use C<post_detect>.
944		945
945	=item $guard = AnyEvent::post_detect { BLOCK }	946	=item $guard = AnyEvent::post_detect { BLOCK }
…		…
1008	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent	1009	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1009	# as soon as it is	1010	# as soon as it is
1010	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };	1011	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1011	}	1012	}
1012		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
1013	=back	1061	=back
1014		1062
1015	=head1 WHAT TO DO IN A MODULE	1063	=head1 WHAT TO DO IN A MODULE
1016		1064
1017	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
…		…
1050	modules might create watchers when they are loaded, and AnyEvent will	1098	modules might create watchers when they are loaded, and AnyEvent will
1051	decide on the event model to use as soon as it creates watchers, and it	1099	decide on the event model to use as soon as it creates watchers, and it
1052	might choose the wrong one unless you load the correct one yourself.	1100	might choose the wrong one unless you load the correct one yourself.
1053		1101
1054	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
1055	C<AnyEvent::Impl::Perl> module, which gives you similar behaviour	1103	C<AnyEvent::Loop> module, which gives you similar behaviour
1056	everywhere, but letting AnyEvent chose the model is generally better.	1104	everywhere, but letting AnyEvent chose the model is generally better.
1057		1105
1058	=head2 MAINLOOP EMULATION	1106	=head2 MAINLOOP EMULATION
1059		1107
1060	Sometimes (often for short test scripts, or even standalone programs who	1108	Sometimes (often for short test scripts, or even standalone programs who
…		…
1155		1203
1156	package AnyEvent;	1204	package AnyEvent;
1157		1205
1158	# basically a tuned-down version of common::sense	1206	# basically a tuned-down version of common::sense
1159	sub common_sense {	1207	sub common_sense {
1160	# from common:.sense 3.3	1208	# from common:.sense 3.4
1161	${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf3\x0f\xc0\xf0\xfc\x33\x00";	1209	${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf0\x0f\xc0\xf0\xfc\x33\x00";
1162	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)	1210	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1163	$^H \|= 0x00000600;	1211	$^H \|= 0x00000600;
1164	}	1212	}
1165		1213
1166	BEGIN { AnyEvent::common_sense }	1214	BEGIN { AnyEvent::common_sense }
1167		1215
1168	use Carp ();	1216	use Carp ();
1169		1217
1170	our $VERSION = '5.271';	1218	our $VERSION = '6.01';
1171	our $MODEL;	1219	our $MODEL;
1172		1220
1173	our $AUTOLOAD;
1174	our @ISA;	1221	our @ISA;
1175		1222
1176	our @REGISTRY;	1223	our @REGISTRY;
1177		1224
1178	our $VERBOSE;	1225	our $VERBOSE;
…		…
1184		1231
1185	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1232	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1186	if ${^TAINT};	1233	if ${^TAINT};
1187		1234
1188	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1235	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;
1189
1190	}	1236	}
1191		1237
1192	our $MAX_SIGNAL_LATENCY = 10;	1238	our $MAX_SIGNAL_LATENCY = 10;
1193		1239
1194	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred	1240	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
…		…
1198	$PROTOCOL{$_} = ++$idx	1244	$PROTOCOL{$_} = ++$idx
1199	for reverse split /\s,\s/,	1245	for reverse split /\s,\s/,
1200	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1246	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1201	}	1247	}
1202		1248
		1249	our @post_detect;
		1250
		1251	sub post_detect(&) {
		1252	my ($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
1203	my @models = (	1289	our @models = (
1204	[EV:: => AnyEvent::Impl::EV:: , 1],	1290	[EV:: => AnyEvent::Impl::EV:: , 1],
1205	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1291	[AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],
1206	# everything below here will not (normally) be autoprobed	1292	# everything below here will not (normally) be autoprobed
1207	# as the pureperl backend should work everywhere	1293	# as the pure perl backend should work everywhere
1208	# and is usually faster	1294	# and is usually faster
1209	[Event:: => AnyEvent::Impl::Event::, 1],	1295	[Event:: => AnyEvent::Impl::Event::, 1],
1210	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1296	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1211	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1297	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1212	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package	1298	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1213	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1299	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1214	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1300	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1215	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1301	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1216	[Wx:: => AnyEvent::Impl::POE::],	1302	[Wx:: => AnyEvent::Impl::POE::],
1217	[Prima:: => AnyEvent::Impl::POE::],	1303	[Prima:: => AnyEvent::Impl::POE::],
1218	# IO::Async is just too broken - we would need workarounds for its	1304	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1219	# byzantine signal and broken child handling, among others.	1305	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1220	# IO::Async is rather hard to detect, as it doesn't have any	1306	[FLTK:: => AnyEvent::Impl::FLTK2::],
1221	# obvious default class.
1222	[IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1223	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1224	[IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
1225	[AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
1226	);	1307	);
1227		1308
1228	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, $reset_ae] : undef;
		1326
		1327	_isa_set;
		1328	}
		1329
		1330	# all autoloaded methods reserve the complete glob, not just the method slot.
		1331	# due to bugs in perls method cache implementation.
1229	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1332	our @methods = qw(io timer time now now_update signal child idle condvar);
1230
1231	our @post_detect;
1232
1233	sub post_detect(&) {
1234	my ($cb) = @_;
1235
1236	push @post_detect, $cb;
1237
1238	defined wantarray
1239	? bless \$cb, "AnyEvent::Util::postdetect"
1240	: ()
1241	}
1242
1243	sub AnyEvent::Util::postdetect::DESTROY {
1244	@post_detect = grep $_ != ${$_[0]}, @post_detect;
1245	}
1246		1333
1247	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
1248	# free some memory	1340	# free some memory
1249	*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;
1250		1349
1251	local $!; # for good measure
1252	local $SIG{__DIE__};
1253
1254	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1350	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1255	my $model = "AnyEvent::Impl::$1";	1351	my $model = $1;
		1352	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1256	if (eval "require $model") {	1353	if (eval "require $model") {
1257	$MODEL = $model;	1354	$MODEL = $model;
1258	warn "AnyEvent: loaded model '$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 $VERBOSE >= 7;
1259	} else {	1357	} else {
1260	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1358	AnyEvent::log warn => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1261	}	1359	}
1262	}	1360	}
1263		1361
1264	# check for already loaded models	1362	# check for already loaded models
1265	unless ($MODEL) {	1363	unless ($MODEL) {
1266	for (@REGISTRY, @models) {	1364	for (@REGISTRY, @models) {
1267	my ($package, $model) = @$_;	1365	my ($package, $model) = @$_;
1268	if (${"$package\::VERSION"} > 0) {	1366	if (${"$package\::VERSION"} > 0) {
1269	if (eval "require $model") {	1367	if (eval "require $model") {
1270	$MODEL = $model;	1368	$MODEL = $model;
1271	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;	1369	AnyEvent::log 7 => "autodetected model '$model', using it."
		1370	if $VERBOSE >= 7;
1272	last;	1371	last;
1273	}	1372	}
1274	}	1373	}
1275	}	1374	}
1276		1375
…		…
1283	and eval "require $package"	1382	and eval "require $package"
1284	and ${"$package\::VERSION"} > 0	1383	and ${"$package\::VERSION"} > 0
1285	and eval "require $model"	1384	and eval "require $model"
1286	) {	1385	) {
1287	$MODEL = $model;	1386	$MODEL = $model;
1288	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;	1387	AnyEvent::log 7 => "autoloaded model '$model', using it."
		1388	if $VERBOSE >= 7;
1289	last;	1389	last;
1290	}	1390	}
1291	}	1391	}
1292		1392
1293	$MODEL	1393	$MODEL
1294	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";	1394	or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?";
1295	}	1395	}
1296	}	1396	}
1297		1397
1298	@models = (); # free probe data	1398	# free memory only needed for probing
		1399	undef @models;
		1400	undef @REGISTRY;
1299		1401
1300	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1402	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1301	unshift @ISA, $MODEL;
1302		1403
1303	# now nuke some methods that are overriden by the backend.	1404	# now nuke some methods that are overridden by the backend.
1304	# SUPER is not allowed.	1405	# SUPER usage is not allowed in these.
1305	for (qw(time signal child idle)) {	1406	for (qw(time signal child idle)) {
1306	undef &{"AnyEvent::Base::$_"}	1407	undef &{"AnyEvent::Base::$_"}
1307	if defined &{"$MODEL\::$_"};	1408	if defined &{"$MODEL\::$_"};
1308	}	1409	}
1309		1410
1310	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 (length $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/\$\$/$$/g;
		1428
		1429	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1430	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1431	}
1311		1432
1312	(shift @post_detect)->() while @post_detect;	1433	(shift @post_detect)->() while @post_detect;
		1434	undef @post_detect;
1313		1435
1314	*post_detect = sub(&) {	1436	*post_detect = sub(&) {
1315	shift->();	1437	shift->();
1316		1438
1317	undef	1439	undef
1318	};	1440	};
1319		1441
1320	$MODEL	1442	$MODEL
1321	}	1443	}
1322		1444
1323	sub AUTOLOAD {	1445	for my $name (@methods) {
1324	(my $func = $AUTOLOAD) =~ s/.*://;	1446	*$name = sub {
1325
1326	$method{$func}
1327	or Carp::croak "$func: not a valid AnyEvent class method";
1328
1329	detect;	1447	detect;
1330		1448	# we use goto because
1331	my $class = shift;	1449	# a) it makes the thunk more transparent
1332	$class->$func (@_);	1450	# b) it allows us to delete the thunk later
		1451	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
		1452	};
1333	}	1453	}
1334		1454
1335	# utility function to dup a filehandle. this is used by many backends	1455	# utility function to dup a filehandle. this is used by many backends
1336	# to support binding more than one watcher per filehandle (they usually	1456	# to support binding more than one watcher per filehandle (they usually
1337	# allow only one watcher per fd, so we dup it to get a different one).	1457	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1361		1481
1362	package AE;	1482	package AE;
1363		1483
1364	our $VERSION = $AnyEvent::VERSION;	1484	our $VERSION = $AnyEvent::VERSION;
1365		1485
		1486	sub _reset() {
		1487	eval q{
1366	# fall back to the main API by default - backends and AnyEvent::Base	1488	# fall back to the main API by default - backends and AnyEvent::Base
1367	# implementations can overwrite these.	1489	# implementations can overwrite these.
1368		1490
1369	sub io($$$) {	1491	sub io($$$) {
1370	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1492	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1371	}	1493	}
1372		1494
1373	sub timer($$$) {	1495	sub timer($$$) {
1374	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1496	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1375	}	1497	}
1376		1498
1377	sub signal($$) {	1499	sub signal($$) {
1378	AnyEvent->signal (signal => $_[0], cb => $_[1])	1500	AnyEvent->signal (signal => $_[0], cb => $_[1])
1379	}	1501	}
1380		1502
1381	sub child($$) {	1503	sub child($$) {
1382	AnyEvent->child (pid => $_[0], cb => $_[1])	1504	AnyEvent->child (pid => $_[0], cb => $_[1])
1383	}	1505	}
1384		1506
1385	sub idle($) {	1507	sub idle($) {
1386	AnyEvent->idle (cb => $_[0])	1508	AnyEvent->idle (cb => $_[0]);
1387	}	1509	}
1388		1510
1389	sub cv(;&) {	1511	sub cv(;&) {
1390	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1512	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1391	}	1513	}
1392		1514
1393	sub now() {	1515	sub now() {
1394	AnyEvent->now	1516	AnyEvent->now
1395	}	1517	}
1396		1518
1397	sub now_update() {	1519	sub now_update() {
1398	AnyEvent->now_update	1520	AnyEvent->now_update
1399	}	1521	}
1400		1522
1401	sub time() {	1523	sub time() {
1402	AnyEvent->time	1524	AnyEvent->time
		1525	}
		1526
		1527	*postpone = \&AnyEvent::postpone;
		1528	*log = \&AnyEvent::log;
		1529	};
		1530	die if $@;
1403	}	1531	}
		1532
		1533	BEGIN { _reset }
1404		1534
1405	package AnyEvent::Base;	1535	package AnyEvent::Base;
1406		1536
1407	# default implementations for many methods	1537	# default implementations for many methods
1408		1538
1409	sub time {	1539	sub time {
1410	eval q{ # poor man's autoloading {}	1540	eval q{ # poor man's autoloading {}
1411	# probe for availability of Time::HiRes	1541	# probe for availability of Time::HiRes
1412	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1542	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1413	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 () };
1414	*AE::time = \&Time::HiRes::time;	1546	*AE::time = \& Time::HiRes::time ;
1415	# if (eval "use POSIX (); (POSIX::times())...	1547	# if (eval "use POSIX (); (POSIX::times())...
1416	} else {	1548	} else {
1417	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 };
1418	*AE::time = sub (){ time }; # epic fail	1551	*AE::time = sub (){ CORE::time };
1419	}	1552	}
1420		1553
1421	*time = sub { AE::time }; # different prototypes	1554	*now = \&time;
1422	};	1555	};
1423	die if $@;	1556	die if $@;
1424		1557
1425	&time	1558	&time
1426	}	1559	}
1427		1560
1428	*now = \&time;	1561	*now = \&time;
1429
1430	sub now_update { }	1562	sub now_update { }
1431		1563
		1564	sub _poll {
		1565	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
		1566	}
		1567
1432	# default implementation for ->condvar	1568	# default implementation for ->condvar
		1569	# in fact, the default should not be overwritten
1433		1570
1434	sub condvar {	1571	sub condvar {
1435	eval q{ # poor man's autoloading {}	1572	eval q{ # poor man's autoloading {}
1436	*condvar = sub {	1573	*condvar = sub {
1437	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1574	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
…		…
1515		1652
1516	sub signal {	1653	sub signal {
1517	eval q{ # poor man's autoloading {}	1654	eval q{ # poor man's autoloading {}
1518	# probe for availability of Async::Interrupt	1655	# probe for availability of Async::Interrupt
1519	if (_have_async_interrupt) {	1656	if (_have_async_interrupt) {
1520	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;
1521		1659
1522	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1660	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1523	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1661	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1524		1662
1525	} else {	1663	} else {
1526	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;
1527		1666
1528	if (AnyEvent::WIN32) {	1667	if (AnyEvent::WIN32) {
1529	require AnyEvent::Util;	1668	require AnyEvent::Util;
1530		1669
1531	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1670	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1607	: sysread $SIGPIPE_R, (my $dummy), 9;	1746	: sysread $SIGPIPE_R, (my $dummy), 9;
1608		1747
1609	while (%SIG_EV) {	1748	while (%SIG_EV) {
1610	for (keys %SIG_EV) {	1749	for (keys %SIG_EV) {
1611	delete $SIG_EV{$_};	1750	delete $SIG_EV{$_};
1612	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1751	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1613	}	1752	}
1614	}	1753	}
1615	};	1754	};
1616	};	1755	};
1617	die if $@;	1756	die if $@;
…		…
1622	# default implementation for ->child	1761	# default implementation for ->child
1623		1762
1624	our %PID_CB;	1763	our %PID_CB;
1625	our $CHLD_W;	1764	our $CHLD_W;
1626	our $CHLD_DELAY_W;	1765	our $CHLD_DELAY_W;
1627	our $WNOHANG;
1628		1766
1629	# used by many Impl's	1767	# used by many Impl's
1630	sub _emit_childstatus($$) {	1768	sub _emit_childstatus($$) {
1631	my (undef, $rpid, $rstatus) = @_;	1769	my (undef, $rpid, $rstatus) = @_;
1632		1770
…		…
1639	eval q{ # poor man's autoloading {}	1777	eval q{ # poor man's autoloading {}
1640	*_sigchld = sub {	1778	*_sigchld = sub {
1641	my $pid;	1779	my $pid;
1642		1780
1643	AnyEvent->_emit_childstatus ($pid, $?)	1781	AnyEvent->_emit_childstatus ($pid, $?)
1644	while ($pid = waitpid -1, $WNOHANG) > 0;	1782	while ($pid = waitpid -1, WNOHANG) > 0;
1645	};	1783	};
1646		1784
1647	*child = sub {	1785	*child = sub {
1648	my (undef, %arg) = @_;	1786	my (undef, %arg) = @_;
1649		1787
1650	defined (my $pid = $arg{pid} + 0)	1788	my $pid = $arg{pid};
1651	or Carp::croak "required option 'pid' is missing";	1789	my $cb = $arg{cb};
1652		1790
1653	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1791	$PID_CB{$pid}{$cb+0} = $cb;
1654
1655	# WNOHANG is almost cetrainly 1 everywhere
1656	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1657	? 1
1658	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1659		1792
1660	unless ($CHLD_W) {	1793	unless ($CHLD_W) {
1661	$CHLD_W = AE::signal CHLD => \&_sigchld;	1794	$CHLD_W = AE::signal CHLD => \&_sigchld;
1662	# 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
1663	&_sigchld;	1796	&_sigchld;
1664	}	1797	}
1665		1798
1666	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1799	bless [$pid, $cb+0], "AnyEvent::Base::child"
1667	};	1800	};
1668		1801
1669	*AnyEvent::Base::child::DESTROY = sub {	1802	*AnyEvent::Base::child::DESTROY = sub {
1670	my ($pid, $cb) = @{$_[0]};	1803	my ($pid, $icb) = @{$_[0]};
1671		1804
1672	delete $PID_CB{$pid}{$cb};	1805	delete $PID_CB{$pid}{$icb};
1673	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1806	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1674		1807
1675	undef $CHLD_W unless keys %PID_CB;	1808	undef $CHLD_W unless keys %PID_CB;
1676	};	1809	};
1677	};	1810	};
…		…
1690		1823
1691	my ($cb, $w, $rcb) = $arg{cb};	1824	my ($cb, $w, $rcb) = $arg{cb};
1692		1825
1693	$rcb = sub {	1826	$rcb = sub {
1694	if ($cb) {	1827	if ($cb) {
1695	$w = _time;	1828	$w = AE::time;
1696	&$cb;	1829	&$cb;
1697	$w = _time - $w;	1830	$w = AE::time - $w;
1698		1831
1699	# 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,
1700	# within some limits	1833	# within some limits
1701	$w = 0.0001 if $w < 0.0001;	1834	$w = 0.0001 if $w < 0.0001;
1702	$w = 5 if $w > 5;	1835	$w = 5 if $w > 5;
…		…
1725		1858
1726	package AnyEvent::CondVar;	1859	package AnyEvent::CondVar;
1727		1860
1728	our @ISA = AnyEvent::CondVar::Base::;	1861	our @ISA = AnyEvent::CondVar::Base::;
1729		1862
		1863	# only to be used for subclassing
		1864	sub new {
		1865	my $class = shift;
		1866	bless AnyEvent->condvar (@_), $class
		1867	}
		1868
1730	package AnyEvent::CondVar::Base;	1869	package AnyEvent::CondVar::Base;
1731		1870
1732	#use overload	1871	#use overload
1733	# '&{}' => sub { my $self = shift; sub { $self->send (@_) } },	1872	# '&{}' => sub { my $self = shift; sub { $self->send (@_) } },
1734	# fallback => 1;	1873	# fallback => 1;
…		…
1743		1882
1744	sub _send {	1883	sub _send {
1745	# nop	1884	# nop
1746	}	1885	}
1747		1886
		1887	sub _wait {
		1888	AnyEvent->_poll until $_[0]{_ae_sent};
		1889	}
		1890
1748	sub send {	1891	sub send {
1749	my $cv = shift;	1892	my $cv = shift;
1750	$cv->{_ae_sent} = [@_];	1893	$cv->{_ae_sent} = [@_];
1751	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};	1894	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1752	$cv->_send;	1895	$cv->_send;
…		…
1759		1902
1760	sub ready {	1903	sub ready {
1761	$_[0]{_ae_sent}	1904	$_[0]{_ae_sent}
1762	}	1905	}
1763		1906
1764	sub _wait {
1765	$WAITING
1766	and !$_[0]{_ae_sent}
1767	and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1768
1769	local $WAITING = 1;
1770	AnyEvent->one_event while !$_[0]{_ae_sent};
1771	}
1772
1773	sub recv {	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;
1774	$_[0]->_wait;	1913	$_[0]->_wait;
		1914	}
1775		1915
1776	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1916	$_[0]{_ae_croak}
1777	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]
1778	}	1922	}
1779		1923
1780	sub cb {	1924	sub cb {
1781	my $cv = shift;	1925	my $cv = shift;
1782		1926
…		…
1798	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };	1942	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };
1799	}	1943	}
1800		1944
1801	# undocumented/compatibility with pre-3.4	1945	# undocumented/compatibility with pre-3.4
1802	*broadcast = \&send;	1946	*broadcast = \&send;
1803	*wait = \&_wait;	1947	*wait = \&recv;
1804		1948
1805	=head1 ERROR AND EXCEPTION HANDLING	1949	=head1 ERROR AND EXCEPTION HANDLING
1806		1950
1807	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
1808	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
…		…
1835		1979
1836	By default, AnyEvent will be completely silent except in fatal	1980	By default, AnyEvent will be completely silent except in fatal
1837	conditions. You can set this environment variable to make AnyEvent more	1981	conditions. You can set this environment variable to make AnyEvent more
1838	talkative.	1982	talkative.
1839		1983
1840	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
1841	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
1842	C<PERL_ANYEVENT_MODEL>.	1986	C<PERL_ANYEVENT_MODEL>.
1843		1987
1844	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
1845	model it chooses.	1989	model it chooses.
1846		1990
1847	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
1848	which optional modules it loads and how it implements certain features.	1992	which optional modules it loads and how it implements certain features.
1849		1993
…		…
1860	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>
1861	>>, it is definitely recommended to keep it off in production. Keeping	2005	>>, it is definitely recommended to keep it off in production. Keeping
1862	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2006	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1863	can be very useful, however.	2007	can be very useful, however.
1864		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
1865	=item C<PERL_ANYEVENT_MODEL>	2031	=item C<PERL_ANYEVENT_MODEL>
1866		2032
1867	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
1868	auto detection and -probing kicks in. It must be a string consisting	2034	auto detection and -probing kicks in.
1869	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
1870	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
1871	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
1872	auto detection and -probing.	2040	auto detection and -probing.
1873		2041
1874	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).
1875		2045
1876	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
1877	could start your program like this:	2047	could start your program like this:
1878		2048
1879	PERL_ANYEVENT_MODEL=Perl perl ...	2049	PERL_ANYEVENT_MODEL=Perl perl ...
1880		2050
1881	=item C<PERL_ANYEVENT_PROTOCOLS>	2051	=item C<PERL_ANYEVENT_PROTOCOLS>
…		…
2271	(even when used without AnyEvent), but most event loops have acceptable	2441	(even when used without AnyEvent), but most event loops have acceptable
2272	performance with or without AnyEvent.	2442	performance with or without AnyEvent.
2273		2443
2274	=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
2275	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
2276	adds AnyEvent significant overhead.	2446	does AnyEvent add significant overhead.
2277		2447
2278	=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
2279	reasonable memory usage.	2449	reasonable memory usage.
2280		2450
2281	=back	2451	=back
…		…
2580		2750
2581	=item L<Time::HiRes>	2751	=item L<Time::HiRes>
2582		2752
2583	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
2584	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
2585	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
2586	try to use a monotonic clock for timing stability.	2756	try to use a monotonic clock for timing stability.
2587		2757
2588	=back	2758	=back
2589		2759
2590		2760
…		…
2652	pronounced).	2822	pronounced).
2653		2823
2654		2824
2655	=head1 SEE ALSO	2825	=head1 SEE ALSO
2656		2826
2657	Utility functions: L<AnyEvent::Util>.	2827	Tutorial/Introduction: L<AnyEvent::Intro>.
2658		2828
2659	Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>,	2829	FAQ: L<AnyEvent::FAQ>.
2660	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>.
2661		2840
2662	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2841	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2663	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>,
2664	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2843	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2665	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>.
2666		2846
2667	Non-blocking file handles, sockets, TCP clients and	2847	Non-blocking handles, pipes, stream sockets, TCP clients and
2668	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2848	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2669		2849
2670	Asynchronous DNS: L<AnyEvent::DNS>.	2850	Asynchronous DNS: L<AnyEvent::DNS>.
2671		2851
2672	Coroutine support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>,	2852	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
2673	L<Coro::Event>,
2674		2853
2675	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::XMPP>,	2854	Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,
2676	L<AnyEvent::HTTP>.	2855	L<AnyEvent::HTTP>.
2677		2856
2678		2857
2679	=head1 AUTHOR	2858	=head1 AUTHOR
2680		2859

Diff Legend

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

Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.332 by root, Tue Aug 31 23:32:40 2010 UTC vs. Revision 1.366 by root, Wed Aug 17 02:02:38 2011 UTC

Diff Legend

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.332 by root, Tue Aug 31 23:32:40 2010 UTC vs.
Revision 1.366 by root, Wed Aug 17 02:02:38 2011 UTC