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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.347 by root, Sun Jan 23 11:15:09 2011 UTC vs.
Revision 1.375 by root, Thu Aug 25 05:39:47 2011 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	AnyEvent - the DBI of event loop programming	3	AnyEvent - the DBI of event loop programming
4		4
5	EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt	5	EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt,
6	and POE are various supported event loops/environments.	6	FLTK and POE are various supported event loops/environments.
7		7
8	=head1 SYNOPSIS	8	=head1 SYNOPSIS
9		9
10	use AnyEvent;	10	use AnyEvent;
11		11
121	The interface itself is vaguely similar, but not identical to the L<Event>	121	The interface itself is vaguely similar, but not identical to the L<Event>
122	module.	122	module.
123		123
124	During the first call of any watcher-creation method, the module tries	124	During the first call of any watcher-creation method, the module tries
125	to detect the currently loaded event loop by probing whether one of the	125	to detect the currently loaded event loop by probing whether one of the
126	following modules is already loaded: L<EV>, L<AnyEvent::Impl::Perl>,	126	following modules is already loaded: L<EV>, L<AnyEvent::Loop>,
127	L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one	127	L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one
128	found is used. If none are detected, the module tries to load the first	128	found is used. If none are detected, the module tries to load the first
129	four modules in the order given; but note that if L<EV> is not	129	four modules in the order given; but note that if L<EV> is not
130	available, the pure-perl L<AnyEvent::Impl::Perl> should always work, so	130	available, the pure-perl L<AnyEvent::Loop> should always work, so
131	the other two are not normally tried.	131	the other two are not normally tried.
132		132
133	Because AnyEvent first checks for modules that are already loaded, loading	133	Because AnyEvent first checks for modules that are already loaded, loading
134	an event model explicitly before first using AnyEvent will likely make	134	an event model explicitly before first using AnyEvent will likely make
135	that model the default. For example:	135	that model the default. For example:
…		…
142	The I<likely> means that, if any module loads another event model and	142	The I<likely> means that, if any module loads another event model and
143	starts using it, all bets are off - this case should be very rare though,	143	starts using it, all bets are off - this case should be very rare though,
144	as very few modules hardcode event loops without announcing this very	144	as very few modules hardcode event loops without announcing this very
145	loudly.	145	loudly.
146		146
147	The pure-perl implementation of AnyEvent is called	147	The pure-perl implementation of AnyEvent is called C<AnyEvent::Loop>. Like
148	C<AnyEvent::Impl::Perl>. Like other event modules you can load it	148	other event modules you can load it explicitly and enjoy the high
149	explicitly and enjoy the high availability of that event loop :)	149	availability of that event loop :)
150		150
151	=head1 WATCHERS	151	=head1 WATCHERS
152		152
153	AnyEvent has the central concept of a I<watcher>, which is an object that	153	AnyEvent has the central concept of a I<watcher>, which is an object that
154	stores relevant data for each kind of event you are waiting for, such as	154	stores relevant data for each kind of event you are waiting for, such as
…		…
356	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into	356	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into
357	account.	357	account.
358		358
359	=item AnyEvent->now_update	359	=item AnyEvent->now_update
360		360
361	Some event loops (such as L<EV> or L<AnyEvent::Impl::Perl>) cache	361	Some event loops (such as L<EV> or L<AnyEvent::Loop>) cache the current
362	the current time for each loop iteration (see the discussion of L<<	362	time for each loop iteration (see the discussion of L<< AnyEvent->now >>,
363	AnyEvent->now >>, above).	363	above).
364		364
365	When a callback runs for a long time (or when the process sleeps), then	365	When a callback runs for a long time (or when the process sleeps), then
366	this "current" time will differ substantially from the real time, which	366	this "current" time will differ substantially from the real time, which
367	might affect timers and time-outs.	367	might affect timers and time-outs.
368		368
…		…
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
…		…
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.	881	AnyEvent::Impl::IOAsync based on IO::Async.
882	AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.	882	AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.
		883	AnyEvent::Impl::FLTK2 based on FLTK (fltk 2 binding).
883		884
884	=item Backends with special needs.	885	=item Backends with special needs.
885		886
886	Qt requires the Qt::Application to be instantiated first, but will	887	Qt requires the Qt::Application to be instantiated first, but will
887	otherwise be picked up automatically. As long as the main program	888	otherwise be picked up automatically. As long as the main program
…		…
932		933
933	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model	934	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model
934	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
935	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
936	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).
937		942
938	If you need to do some initialisation before AnyEvent watchers are	943	If you need to do some initialisation before AnyEvent watchers are
939	created, use C<post_detect>.	944	created, use C<post_detect>.
940		945
941	=item $guard = AnyEvent::post_detect { BLOCK }	946	=item $guard = AnyEvent::post_detect { BLOCK }
…		…
1004	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent	1009	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1005	# as soon as it is	1010	# as soon as it is
1006	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };	1011	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1007	}	1012	}
1008		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
		1061	If you want to sprinkle loads of logging calls around your code, consider
		1062	creating a logger callback with the C<AnyEvent::Log::logger> function.
		1063
1009	=back	1064	=back
1010		1065
1011	=head1 WHAT TO DO IN A MODULE	1066	=head1 WHAT TO DO IN A MODULE
1012		1067
1013	As a module author, you should C<use AnyEvent> and call AnyEvent methods	1068	As a module author, you should C<use AnyEvent> and call AnyEvent methods
…		…
1046	modules might create watchers when they are loaded, and AnyEvent will	1101	modules might create watchers when they are loaded, and AnyEvent will
1047	decide on the event model to use as soon as it creates watchers, and it	1102	decide on the event model to use as soon as it creates watchers, and it
1048	might choose the wrong one unless you load the correct one yourself.	1103	might choose the wrong one unless you load the correct one yourself.
1049		1104
1050	You can chose to use a pure-perl implementation by loading the	1105	You can chose to use a pure-perl implementation by loading the
1051	C<AnyEvent::Impl::Perl> module, which gives you similar behaviour	1106	C<AnyEvent::Loop> module, which gives you similar behaviour
1052	everywhere, but letting AnyEvent chose the model is generally better.	1107	everywhere, but letting AnyEvent chose the model is generally better.
1053		1108
1054	=head2 MAINLOOP EMULATION	1109	=head2 MAINLOOP EMULATION
1055		1110
1056	Sometimes (often for short test scripts, or even standalone programs who	1111	Sometimes (often for short test scripts, or even standalone programs who
…		…
1069		1124
1070		1125
1071	=head1 OTHER MODULES	1126	=head1 OTHER MODULES
1072		1127
1073	The following is a non-exhaustive list of additional modules that use	1128	The following is a non-exhaustive list of additional modules that use
1074	AnyEvent as a client and can therefore be mixed easily with other AnyEvent	1129	AnyEvent as a client and can therefore be mixed easily with other
1075	modules and other event loops in the same program. Some of the modules	1130	AnyEvent modules and other event loops in the same program. Some of the
1076	come as part of AnyEvent, the others are available via CPAN.	1131	modules come as part of AnyEvent, the others are available via CPAN (see
		1132	L<http://search.cpan.org/search?m=module&q=anyevent%3A%3A*> for
		1133	a longer non-exhaustive list), and the list is heavily biased towards
		1134	modules of the AnyEvent author himself :)
1077		1135
1078	=over 4	1136	=over 4
1079		1137
1080	=item L<AnyEvent::Util>	1138	=item L<AnyEvent::Util>
1081		1139
…		…
1161		1219
1162	BEGIN { AnyEvent::common_sense }	1220	BEGIN { AnyEvent::common_sense }
1163		1221
1164	use Carp ();	1222	use Carp ();
1165		1223
1166	our $VERSION = '5.31';	1224	our $VERSION = '6.01';
1167	our $MODEL;	1225	our $MODEL;
1168		1226
1169	our $AUTOLOAD;
1170	our @ISA;	1227	our @ISA;
1171		1228
1172	our @REGISTRY;	1229	our @REGISTRY;
1173		1230
1174	our $VERBOSE;	1231	our $VERBOSE;
…		…
1179	eval "sub TAINT (){" . (${^TAINT}*1) . "}";	1236	eval "sub TAINT (){" . (${^TAINT}*1) . "}";
1180		1237
1181	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1238	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1182	if ${^TAINT};	1239	if ${^TAINT};
1183		1240
		1241	$ENV{"PERL_ANYEVENT_$_"} = $ENV{"AE_$_"}
		1242	for grep s/^AE_// && !exists $ENV{"PERL_ANYEVENT_$_"}, keys %ENV;
		1243
		1244	@ENV{grep /^PERL_ANYEVENT_/, keys %ENV} = ()
		1245	if ${^TAINT};
		1246
1184	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1247	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;
1185
1186	}	1248	}
1187		1249
1188	our $MAX_SIGNAL_LATENCY = 10;	1250	our $MAX_SIGNAL_LATENCY = 10;
1189		1251
1190	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred	1252	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
…		…
1194	$PROTOCOL{$_} = ++$idx	1256	$PROTOCOL{$_} = ++$idx
1195	for reverse split /\s,\s/,	1257	for reverse split /\s,\s/,
1196	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1258	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1197	}	1259	}
1198		1260
		1261	our @post_detect;
		1262
		1263	sub post_detect(&) {
		1264	my ($cb) = @_;
		1265
		1266	push @post_detect, $cb;
		1267
		1268	defined wantarray
		1269	? bless \$cb, "AnyEvent::Util::postdetect"
		1270	: ()
		1271	}
		1272
		1273	sub AnyEvent::Util::postdetect::DESTROY {
		1274	@post_detect = grep $_ != ${$_[0]}, @post_detect;
		1275	}
		1276
		1277	our $POSTPONE_W;
		1278	our @POSTPONE;
		1279
		1280	sub _postpone_exec {
		1281	undef $POSTPONE_W;
		1282
		1283	&{ shift @POSTPONE }
		1284	while @POSTPONE;
		1285	}
		1286
		1287	sub postpone(&) {
		1288	push @POSTPONE, shift;
		1289
		1290	$POSTPONE_W \|\|= AE::timer (0, 0, \&_postpone_exec);
		1291
		1292	()
		1293	}
		1294
		1295	sub log($$;@) {
		1296	# only load the bug bloated module when we actually are about to log something
		1297	if ($_[0] <= $VERBOSE) {
		1298	require AnyEvent::Log;
		1299	# AnyEvent::Log overwrites this function
		1300	goto &log;
		1301	}
		1302	}
		1303
		1304	if (length $ENV{PERL_ANYEVENT_LOG}) {
		1305	require AnyEvent::Log; # AnyEvent::Log does the thing for us
		1306	}
		1307
1199	my @models = (	1308	our @models = (
1200	[EV:: => AnyEvent::Impl::EV:: , 1],	1309	[EV:: => AnyEvent::Impl::EV:: , 1],
1201	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1310	[AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],
1202	# everything below here will not (normally) be autoprobed	1311	# everything below here will not (normally) be autoprobed
1203	# as the pureperl backend should work everywhere	1312	# as the pure perl backend should work everywhere
1204	# and is usually faster	1313	# and is usually faster
1205	[Event:: => AnyEvent::Impl::Event::, 1],	1314	[Event:: => AnyEvent::Impl::Event::, 1],
1206	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1315	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1207	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1316	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1208	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package	1317	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1209	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1318	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1210	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1319	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1211	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1320	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1212	[Wx:: => AnyEvent::Impl::POE::],	1321	[Wx:: => AnyEvent::Impl::POE::],
1213	[Prima:: => AnyEvent::Impl::POE::],	1322	[Prima:: => AnyEvent::Impl::POE::],
1214	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::],	1323	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1215	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],	1324	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
		1325	[FLTK:: => AnyEvent::Impl::FLTK2::],
1216	);	1326	);
1217		1327
1218	our %method = map +($_ => 1),	1328	our @isa_hook;
		1329
		1330	sub _isa_set {
		1331	my @pkg = ("AnyEvent", (map $_->[0], grep defined, @isa_hook), $MODEL);
		1332
		1333	@{"$pkg[$_-1]::ISA"} = $pkg[$_]
		1334	for 1 .. $#pkg;
		1335
		1336	grep $_ && $_->[1], @isa_hook
		1337	and AE::_reset ();
		1338	}
		1339
		1340	# used for hooking AnyEvent::Strict and AnyEvent::Debug::Wrap into the class hierarchy
		1341	sub _isa_hook($$;$) {
		1342	my ($i, $pkg, $reset_ae) = @_;
		1343
		1344	$isa_hook[$i] = $pkg ? [$pkg, $reset_ae] : undef;
		1345
		1346	_isa_set;
		1347	}
		1348
		1349	# all autoloaded methods reserve the complete glob, not just the method slot.
		1350	# due to bugs in perls method cache implementation.
1219	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1351	our @methods = qw(io timer time now now_update signal child idle condvar);
1220
1221	our @post_detect;
1222
1223	sub post_detect(&) {
1224	my ($cb) = @_;
1225
1226	push @post_detect, $cb;
1227
1228	defined wantarray
1229	? bless \$cb, "AnyEvent::Util::postdetect"
1230	: ()
1231	}
1232
1233	sub AnyEvent::Util::postdetect::DESTROY {
1234	@post_detect = grep $_ != ${$_[0]}, @post_detect;
1235	}
1236		1352
1237	sub detect() {	1353	sub detect() {
		1354	return $MODEL if $MODEL; # some programs keep references to detect
		1355
		1356	local $!; # for good measure
		1357	local $SIG{__DIE__}; # we use eval
		1358
1238	# free some memory	1359	# free some memory
1239	*detect = sub () { $MODEL };	1360	*detect = sub () { $MODEL };
		1361	# undef &func doesn't correctly update the method cache. grmbl.
		1362	# so we delete the whole glob. grmbl.
		1363	# otoh, perl doesn't let me undef an active usb, but it lets me free
		1364	# a glob with an active sub. hrm. i hope it works, but perl is
		1365	# usually buggy in this department. sigh.
		1366	delete @{"AnyEvent::"}{@methods};
		1367	undef @methods;
1240		1368
1241	local $!; # for good measure
1242	local $SIG{__DIE__};
1243
1244	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1369	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1245	my $model = "AnyEvent::Impl::$1";	1370	my $model = $1;
		1371	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1246	if (eval "require $model") {	1372	if (eval "require $model") {
		1373	AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1247	$MODEL = $model;	1374	$MODEL = $model;
1248	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1249	} else {	1375	} else {
1250	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1376	AnyEvent::log warn => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1251	}	1377	}
1252	}	1378	}
1253		1379
1254	# check for already loaded models	1380	# check for already loaded models
1255	unless ($MODEL) {	1381	unless ($MODEL) {
1256	for (@REGISTRY, @models) {	1382	for (@REGISTRY, @models) {
1257	my ($package, $model) = @$_;	1383	my ($package, $model) = @$_;
1258	if (${"$package\::VERSION"} > 0) {	1384	if (${"$package\::VERSION"} > 0) {
1259	if (eval "require $model") {	1385	if (eval "require $model") {
		1386	AnyEvent::log 7 => "autodetected model '$model', using it.";
1260	$MODEL = $model;	1387	$MODEL = $model;
1261	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;
1262	last;	1388	last;
1263	}	1389	}
1264	}	1390	}
1265	}	1391	}
1266		1392
…		…
1272	$autoload	1398	$autoload
1273	and eval "require $package"	1399	and eval "require $package"
1274	and ${"$package\::VERSION"} > 0	1400	and ${"$package\::VERSION"} > 0
1275	and eval "require $model"	1401	and eval "require $model"
1276	) {	1402	) {
		1403	AnyEvent::log 7 => "autoloaded model '$model', using it.";
1277	$MODEL = $model;	1404	$MODEL = $model;
1278	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1279	last;	1405	last;
1280	}	1406	}
1281	}	1407	}
1282		1408
1283	$MODEL	1409	$MODEL
1284	or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";	1410	or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?";
1285	}	1411	}
1286	}	1412	}
1287		1413
1288	@models = (); # free probe data	1414	# free memory only needed for probing
		1415	undef @models;
		1416	undef @REGISTRY;
1289		1417
1290	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1418	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1291	unshift @ISA, $MODEL;
1292		1419
1293	# now nuke some methods that are overridden by the backend.	1420	# now nuke some methods that are overridden by the backend.
1294	# SUPER is not allowed.	1421	# SUPER usage is not allowed in these.
1295	for (qw(time signal child idle)) {	1422	for (qw(time signal child idle)) {
1296	undef &{"AnyEvent::Base::$_"}	1423	undef &{"AnyEvent::Base::$_"}
1297	if defined &{"$MODEL\::$_"};	1424	if defined &{"$MODEL\::$_"};
1298	}	1425	}
1299		1426
		1427	_isa_set;
		1428
		1429	# we're officially open!
		1430
1300	if ($ENV{PERL_ANYEVENT_STRICT}) {	1431	if ($ENV{PERL_ANYEVENT_STRICT}) {
1301	eval { require AnyEvent::Strict };	1432	require AnyEvent::Strict;
1302	warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1303	if $@ && $VERBOSE;
1304	}	1433	}
1305		1434
		1435	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1436	require AnyEvent::Debug;
		1437	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1438	}
		1439
		1440	if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1441	require AnyEvent::Socket;
		1442	require AnyEvent::Debug;
		1443
		1444	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1445	$shell =~ s/\$\$/$$/g;
		1446
		1447	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1448	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1449	}
		1450
		1451	# now the anyevent environment is set up as the user told us to, so
		1452	# call the actual user code - post detects
		1453
1306	(shift @post_detect)->() while @post_detect;	1454	(shift @post_detect)->() while @post_detect;
		1455	undef @post_detect;
1307		1456
1308	*post_detect = sub(&) {	1457	*post_detect = sub(&) {
1309	shift->();	1458	shift->();
1310		1459
1311	undef	1460	undef
1312	};	1461	};
1313		1462
1314	$MODEL	1463	$MODEL
1315	}	1464	}
1316		1465
1317	sub AUTOLOAD {	1466	for my $name (@methods) {
1318	(my $func = $AUTOLOAD) =~ s/.*://;	1467	*$name = sub {
1319
1320	$method{$func}
1321	or Carp::croak "$func: not a valid AnyEvent class method";
1322
1323	detect;	1468	detect;
1324		1469	# we use goto because
1325	my $class = shift;	1470	# a) it makes the thunk more transparent
1326	$class->$func (@_);	1471	# b) it allows us to delete the thunk later
		1472	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
		1473	};
1327	}	1474	}
1328		1475
1329	# utility function to dup a filehandle. this is used by many backends	1476	# utility function to dup a filehandle. this is used by many backends
1330	# to support binding more than one watcher per filehandle (they usually	1477	# to support binding more than one watcher per filehandle (they usually
1331	# allow only one watcher per fd, so we dup it to get a different one).	1478	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1355		1502
1356	package AE;	1503	package AE;
1357		1504
1358	our $VERSION = $AnyEvent::VERSION;	1505	our $VERSION = $AnyEvent::VERSION;
1359		1506
		1507	sub _reset() {
		1508	eval q{
1360	# fall back to the main API by default - backends and AnyEvent::Base	1509	# fall back to the main API by default - backends and AnyEvent::Base
1361	# implementations can overwrite these.	1510	# implementations can overwrite these.
1362		1511
1363	sub io($$$) {	1512	sub io($$$) {
1364	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1513	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1365	}	1514	}
1366		1515
1367	sub timer($$$) {	1516	sub timer($$$) {
1368	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1517	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1369	}	1518	}
1370		1519
1371	sub signal($$) {	1520	sub signal($$) {
1372	AnyEvent->signal (signal => $_[0], cb => $_[1])	1521	AnyEvent->signal (signal => $_[0], cb => $_[1])
1373	}	1522	}
1374		1523
1375	sub child($$) {	1524	sub child($$) {
1376	AnyEvent->child (pid => $_[0], cb => $_[1])	1525	AnyEvent->child (pid => $_[0], cb => $_[1])
1377	}	1526	}
1378		1527
1379	sub idle($) {	1528	sub idle($) {
1380	AnyEvent->idle (cb => $_[0])	1529	AnyEvent->idle (cb => $_[0]);
1381	}	1530	}
1382		1531
1383	sub cv(;&) {	1532	sub cv(;&) {
1384	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1533	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1385	}	1534	}
1386		1535
1387	sub now() {	1536	sub now() {
1388	AnyEvent->now	1537	AnyEvent->now
1389	}	1538	}
1390		1539
1391	sub now_update() {	1540	sub now_update() {
1392	AnyEvent->now_update	1541	AnyEvent->now_update
1393	}	1542	}
1394		1543
1395	sub time() {	1544	sub time() {
1396	AnyEvent->time	1545	AnyEvent->time
		1546	}
		1547
		1548	*postpone = \&AnyEvent::postpone;
		1549	*log = \&AnyEvent::log;
		1550	};
		1551	die if $@;
1397	}	1552	}
		1553
		1554	BEGIN { _reset }
1398		1555
1399	package AnyEvent::Base;	1556	package AnyEvent::Base;
1400		1557
1401	# default implementations for many methods	1558	# default implementations for many methods
1402		1559
1403	sub time {	1560	sub time {
1404	eval q{ # poor man's autoloading {}	1561	eval q{ # poor man's autoloading {}
1405	# probe for availability of Time::HiRes	1562	# probe for availability of Time::HiRes
1406	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1563	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1407	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1564	AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy."
		1565	if $AnyEvent::VERBOSE >= 8;
		1566	*time = sub { Time::HiRes::time () };
1408	*AE::time = \&Time::HiRes::time;	1567	*AE::time = \& Time::HiRes::time ;
1409	# if (eval "use POSIX (); (POSIX::times())...	1568	# if (eval "use POSIX (); (POSIX::times())...
1410	} else {	1569	} else {
1411	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1570	AnyEvent::log critical => "using built-in time(), WARNING, no sub-second resolution!";
		1571	*time = sub { CORE::time };
1412	*AE::time = sub (){ time }; # epic fail	1572	*AE::time = sub (){ CORE::time };
1413	}	1573	}
1414		1574
1415	*time = sub { AE::time }; # different prototypes	1575	*now = \&time;
1416	};	1576	};
1417	die if $@;	1577	die if $@;
1418		1578
1419	&time	1579	&time
1420	}	1580	}
1421		1581
1422	*now = \&time;	1582	*now = \&time;
1423
1424	sub now_update { }	1583	sub now_update { }
1425		1584
		1585	sub _poll {
		1586	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
		1587	}
		1588
1426	# default implementation for ->condvar	1589	# default implementation for ->condvar
		1590	# in fact, the default should not be overwritten
1427		1591
1428	sub condvar {	1592	sub condvar {
1429	eval q{ # poor man's autoloading {}	1593	eval q{ # poor man's autoloading {}
1430	*condvar = sub {	1594	*condvar = sub {
1431	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1595	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
…		…
1509		1673
1510	sub signal {	1674	sub signal {
1511	eval q{ # poor man's autoloading {}	1675	eval q{ # poor man's autoloading {}
1512	# probe for availability of Async::Interrupt	1676	# probe for availability of Async::Interrupt
1513	if (_have_async_interrupt) {	1677	if (_have_async_interrupt) {
1514	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1678	AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling."
		1679	if $AnyEvent::VERBOSE >= 8;
1515		1680
1516	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1681	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1517	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1682	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1518		1683
1519	} else {	1684	} else {
1520	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1685	AnyEvent::log 8 => "using emulated perl signal handling with latency timer."
		1686	if $AnyEvent::VERBOSE >= 8;
1521		1687
1522	if (AnyEvent::WIN32) {	1688	if (AnyEvent::WIN32) {
1523	require AnyEvent::Util;	1689	require AnyEvent::Util;
1524		1690
1525	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1691	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1601	: sysread $SIGPIPE_R, (my $dummy), 9;	1767	: sysread $SIGPIPE_R, (my $dummy), 9;
1602		1768
1603	while (%SIG_EV) {	1769	while (%SIG_EV) {
1604	for (keys %SIG_EV) {	1770	for (keys %SIG_EV) {
1605	delete $SIG_EV{$_};	1771	delete $SIG_EV{$_};
1606	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1772	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1607	}	1773	}
1608	}	1774	}
1609	};	1775	};
1610	};	1776	};
1611	die if $@;	1777	die if $@;
…		…
1638	};	1804	};
1639		1805
1640	*child = sub {	1806	*child = sub {
1641	my (undef, %arg) = @_;	1807	my (undef, %arg) = @_;
1642		1808
1643	defined (my $pid = $arg{pid} + 0)	1809	my $pid = $arg{pid};
1644	or Carp::croak "required option 'pid' is missing";	1810	my $cb = $arg{cb};
1645		1811
1646	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1812	$PID_CB{$pid}{$cb+0} = $cb;
1647		1813
1648	unless ($CHLD_W) {	1814	unless ($CHLD_W) {
1649	$CHLD_W = AE::signal CHLD => \&_sigchld;	1815	$CHLD_W = AE::signal CHLD => \&_sigchld;
1650	# child could be a zombie already, so make at least one round	1816	# child could be a zombie already, so make at least one round
1651	&_sigchld;	1817	&_sigchld;
1652	}	1818	}
1653		1819
1654	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1820	bless [$pid, $cb+0], "AnyEvent::Base::child"
1655	};	1821	};
1656		1822
1657	*AnyEvent::Base::child::DESTROY = sub {	1823	*AnyEvent::Base::child::DESTROY = sub {
1658	my ($pid, $cb) = @{$_[0]};	1824	my ($pid, $icb) = @{$_[0]};
1659		1825
1660	delete $PID_CB{$pid}{$cb};	1826	delete $PID_CB{$pid}{$icb};
1661	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1827	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1662		1828
1663	undef $CHLD_W unless keys %PID_CB;	1829	undef $CHLD_W unless keys %PID_CB;
1664	};	1830	};
1665	};	1831	};
…		…
1678		1844
1679	my ($cb, $w, $rcb) = $arg{cb};	1845	my ($cb, $w, $rcb) = $arg{cb};
1680		1846
1681	$rcb = sub {	1847	$rcb = sub {
1682	if ($cb) {	1848	if ($cb) {
1683	$w = _time;	1849	$w = AE::time;
1684	&$cb;	1850	&$cb;
1685	$w = _time - $w;	1851	$w = AE::time - $w;
1686		1852
1687	# never use more then 50% of the time for the idle watcher,	1853	# never use more then 50% of the time for the idle watcher,
1688	# within some limits	1854	# within some limits
1689	$w = 0.0001 if $w < 0.0001;	1855	$w = 0.0001 if $w < 0.0001;
1690	$w = 5 if $w > 5;	1856	$w = 5 if $w > 5;
…		…
1737		1903
1738	sub _send {	1904	sub _send {
1739	# nop	1905	# nop
1740	}	1906	}
1741		1907
		1908	sub _wait {
		1909	AnyEvent->_poll until $_[0]{_ae_sent};
		1910	}
		1911
1742	sub send {	1912	sub send {
1743	my $cv = shift;	1913	my $cv = shift;
1744	$cv->{_ae_sent} = [@_];	1914	$cv->{_ae_sent} = [@_];
1745	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};	1915	(delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1746	$cv->_send;	1916	$cv->_send;
…		…
1753		1923
1754	sub ready {	1924	sub ready {
1755	$_[0]{_ae_sent}	1925	$_[0]{_ae_sent}
1756	}	1926	}
1757		1927
1758	sub _wait {
1759	$WAITING
1760	and !$_[0]{_ae_sent}
1761	and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1762
1763	local $WAITING = 1;
1764	AnyEvent->one_event while !$_[0]{_ae_sent};
1765	}
1766
1767	sub recv {	1928	sub recv {
		1929	unless ($_[0]{_ae_sent}) {
		1930	$WAITING
		1931	and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
		1932
		1933	local $WAITING = 1;
1768	$_[0]->_wait;	1934	$_[0]->_wait;
		1935	}
1769		1936
1770	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1937	$_[0]{_ae_croak}
1771	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1938	and Carp::croak $_[0]{_ae_croak};
		1939
		1940	wantarray
		1941	? @{ $_[0]{_ae_sent} }
		1942	: $_[0]{_ae_sent}[0]
1772	}	1943	}
1773		1944
1774	sub cb {	1945	sub cb {
1775	my $cv = shift;	1946	my $cv = shift;
1776		1947
…		…
1792	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };	1963	&{ $_[0]{_ae_end_cb} \|\| sub { $_[0]->send } };
1793	}	1964	}
1794		1965
1795	# undocumented/compatibility with pre-3.4	1966	# undocumented/compatibility with pre-3.4
1796	*broadcast = \&send;	1967	*broadcast = \&send;
1797	*wait = \&_wait;	1968	*wait = \&recv;
1798		1969
1799	=head1 ERROR AND EXCEPTION HANDLING	1970	=head1 ERROR AND EXCEPTION HANDLING
1800		1971
1801	In general, AnyEvent does not do any error handling - it relies on the	1972	In general, AnyEvent does not do any error handling - it relies on the
1802	caller to do that if required. The L<AnyEvent::Strict> module (see also	1973	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
1814	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and	1985	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
1815	so on.	1986	so on.
1816		1987
1817	=head1 ENVIRONMENT VARIABLES	1988	=head1 ENVIRONMENT VARIABLES
1818		1989
1819	The following environment variables are used by this module or its	1990	AnyEvent supports a number of environment variables that tune the
1820	submodules.	1991	runtime behaviour. They are usually evaluated when AnyEvent is
		1992	loaded, initialised, or a submodule that uses them is loaded. Many of
		1993	them also cause AnyEvent to load additional modules - for example,
		1994	C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be
		1995	loaded.
1821		1996
1822	Note that AnyEvent will remove I<all> environment variables starting with	1997	All the environment variables documented here start with
1823	C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is	1998	C<PERL_ANYEVENT_>, which is what AnyEvent considers its own
1824	enabled.	1999	namespace. Other modules are encouraged (but by no means required) to use
		2000	C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule
		2001	namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could
		2002	be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env
		2003	variables starting with C<AE_>, see below).
		2004
		2005	All variables can also be set via the C<AE_> prefix, that is, instead
		2006	of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In
		2007	case there is a clash btween anyevent and another program that uses
		2008	C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something>
		2009	variable to the empty string, as those variables take precedence.
		2010
		2011	When AnyEvent is first loaded, it copies all C<AE_xxx> env variables
		2012	to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already
		2013	exists. If taint mode is on, then AnyEvent will remove I<all> environment
		2014	variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them
		2015	with C<undef> or the empty string, if the corresaponding C<AE_> variable
		2016	is set).
		2017
		2018	The exact algorithm is currently:
		2019
		2020	1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV
		2021	2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists
		2022	3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef.
		2023
		2024	This ensures that child processes will not see the C<AE_> variables.
		2025
		2026	The following environment variables are currently known to AnyEvent:
1825		2027
1826	=over 4	2028	=over 4
1827		2029
1828	=item C<PERL_ANYEVENT_VERBOSE>	2030	=item C<PERL_ANYEVENT_VERBOSE>
1829		2031
1830	By default, AnyEvent will be completely silent except in fatal	2032	By default, AnyEvent will be completely silent except in fatal
1831	conditions. You can set this environment variable to make AnyEvent more	2033	conditions. You can set this environment variable to make AnyEvent more
1832	talkative.	2034	talkative. If you want to do more than just set the global logging level
		2035	you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
		2036	complex specifications.
1833		2037
1834	When set to C<1> or higher, causes AnyEvent to warn about unexpected	2038	When set to C<5> or higher, causes AnyEvent to warn about unexpected
1835	conditions, such as not being able to load the event model specified by	2039	conditions, such as not being able to load the event model specified by
1836	C<PERL_ANYEVENT_MODEL>.	2040	C<PERL_ANYEVENT_MODEL>.
1837		2041
1838	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	2042	When set to C<7> or higher, cause AnyEvent to report to STDERR which event
1839	model it chooses.	2043	model it chooses.
1840		2044
1841	When set to C<8> or higher, then AnyEvent will report extra information on	2045	When set to C<8> or higher, then AnyEvent will report extra information on
1842	which optional modules it loads and how it implements certain features.	2046	which optional modules it loads and how it implements certain features.
		2047
		2048	=item C<PERL_ANYEVENT_LOG>
		2049
		2050	Accepts rather complex logging specifications. For example, you could log
		2051	all C<debug> messages of some module to stderr, warnings and above to
		2052	stderr, and errors and above to syslog, with:
		2053
		2054	PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog
		2055
		2056	For the rather extensive details, see L<AnyEvent::Log>.
		2057
		2058	This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
		2059	so will take effect even before AnyEvent has initialised itself.
		2060
		2061	Note that specifying this environment variable causes the L<AnyEvent::Log>
		2062	module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
		2063	using the latter saves a few hundred kB of memory until the first message
		2064	is being logged.
1843		2065
1844	=item C<PERL_ANYEVENT_STRICT>	2066	=item C<PERL_ANYEVENT_STRICT>
1845		2067
1846	AnyEvent does not do much argument checking by default, as thorough	2068	AnyEvent does not do much argument checking by default, as thorough
1847	argument checking is very costly. Setting this variable to a true value	2069	argument checking is very costly. Setting this variable to a true value
…		…
1854	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>	2076	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>
1855	>>, it is definitely recommended to keep it off in production. Keeping	2077	>>, it is definitely recommended to keep it off in production. Keeping
1856	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2078	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1857	can be very useful, however.	2079	can be very useful, however.
1858		2080
		2081	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2082
		2083	If this env variable is set, then its contents will be interpreted by
		2084	C<AnyEvent::Socket::parse_hostport> (after replacing every occurance of
		2085	C<$$> by the process pid) and an C<AnyEvent::Debug::shell> is bound on
		2086	that port. The shell object is saved in C<$AnyEvent::Debug::SHELL>.
		2087
		2088	This happens when the first watcher is created.
		2089
		2090	For example, to bind a debug shell on a unix domain socket in
		2091	F<< /tmp/debug<pid>.sock >>, you could use this:
		2092
		2093	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2094
		2095	Note that creating sockets in F</tmp> is very unsafe on multiuser
		2096	systems.
		2097
		2098	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2099
		2100	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2101	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2102
1859	=item C<PERL_ANYEVENT_MODEL>	2103	=item C<PERL_ANYEVENT_MODEL>
1860		2104
1861	This can be used to specify the event model to be used by AnyEvent, before	2105	This can be used to specify the event model to be used by AnyEvent, before
1862	auto detection and -probing kicks in. It must be a string consisting	2106	auto detection and -probing kicks in.
1863	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2107
		2108	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2109	or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1864	and the resulting module name is loaded and if the load was successful,	2110	resulting module name is loaded and - if the load was successful - used as
1865	used as event model. If it fails to load AnyEvent will proceed with	2111	event model backend. If it fails to load then AnyEvent will proceed with
1866	auto detection and -probing.	2112	auto detection and -probing.
1867		2113
1868	This functionality might change in future versions.	2114	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2115	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2116	the end of a string designates a module name and quotes it appropriately).
1869		2117
1870	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you	2118	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1871	could start your program like this:	2119	could start your program like this:
1872		2120
1873	PERL_ANYEVENT_MODEL=Perl perl ...	2121	PERL_ANYEVENT_MODEL=Perl perl ...
1874		2122
1875	=item C<PERL_ANYEVENT_PROTOCOLS>	2123	=item C<PERL_ANYEVENT_PROTOCOLS>
…		…
1891	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>	2139	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1892	- only support IPv4, never try to resolve or contact IPv6	2140	- only support IPv4, never try to resolve or contact IPv6
1893	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or	2141	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1894	IPv6, but prefer IPv6 over IPv4.	2142	IPv6, but prefer IPv6 over IPv4.
1895		2143
		2144	=item C<PERL_ANYEVENT_HOSTS>
		2145
		2146	This variable, if specified, overrides the F</etc/hosts> file used by
		2147	L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read
		2148	from that file instead.
		2149
1896	=item C<PERL_ANYEVENT_EDNS0>	2150	=item C<PERL_ANYEVENT_EDNS0>
1897		2151
1898	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension	2152	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension for
1899	for DNS. This extension is generally useful to reduce DNS traffic, but	2153	DNS. This extension is generally useful to reduce DNS traffic, especially
1900	some (broken) firewalls drop such DNS packets, which is why it is off by	2154	when DNSSEC is involved, but some (broken) firewalls drop such DNS
1901	default.	2155	packets, which is why it is off by default.
1902		2156
1903	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	2157	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1904	EDNS0 in its DNS requests.	2158	EDNS0 in its DNS requests.
1905		2159
1906	=item C<PERL_ANYEVENT_MAX_FORKS>	2160	=item C<PERL_ANYEVENT_MAX_FORKS>
…		…
1914	resolver - this is the maximum number of parallel DNS requests that are	2168	resolver - this is the maximum number of parallel DNS requests that are
1915	sent to the DNS server.	2169	sent to the DNS server.
1916		2170
1917	=item C<PERL_ANYEVENT_RESOLV_CONF>	2171	=item C<PERL_ANYEVENT_RESOLV_CONF>
1918		2172
1919	The file to use instead of F</etc/resolv.conf> (or OS-specific	2173	The absolute path to a F<resolv.conf>-style file to use instead of
1920	configuration) in the default resolver. When set to the empty string, no	2174	F</etc/resolv.conf> (or the OS-specific configuration) in the default
1921	default config will be used.	2175	resolver, or the empty string to select the default configuration.
1922		2176
1923	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.	2177	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.
1924		2178
1925	When neither C<ca_file> nor C<ca_path> was specified during	2179	When neither C<ca_file> nor C<ca_path> was specified during
1926	L<AnyEvent::TLS> context creation, and either of these environment	2180	L<AnyEvent::TLS> context creation, and either of these environment
1927	variables exist, they will be used to specify CA certificate locations	2181	variables are nonempty, they will be used to specify CA certificate
1928	instead of a system-dependent default.	2182	locations instead of a system-dependent default.
1929		2183
1930	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>	2184	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>
1931		2185
1932	When these are set to C<1>, then the respective modules are not	2186	When these are set to C<1>, then the respective modules are not
1933	loaded. Mostly good for testing AnyEvent itself.	2187	loaded. Mostly good for testing AnyEvent itself.
…		…
2265	(even when used without AnyEvent), but most event loops have acceptable	2519	(even when used without AnyEvent), but most event loops have acceptable
2266	performance with or without AnyEvent.	2520	performance with or without AnyEvent.
2267		2521
2268	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2522	=item * The overhead AnyEvent adds is usually much smaller than the overhead of
2269	the actual event loop, only with extremely fast event loops such as EV	2523	the actual event loop, only with extremely fast event loops such as EV
2270	adds AnyEvent significant overhead.	2524	does AnyEvent add significant overhead.
2271		2525
2272	=item * You should avoid POE like the plague if you want performance or	2526	=item * You should avoid POE like the plague if you want performance or
2273	reasonable memory usage.	2527	reasonable memory usage.
2274		2528
2275	=back	2529	=back
…		…
2574		2828
2575	=item L<Time::HiRes>	2829	=item L<Time::HiRes>
2576		2830
2577	This module is part of perl since release 5.008. It will be used when the	2831	This module is part of perl since release 5.008. It will be used when the
2578	chosen event library does not come with a timing source of its own. The	2832	chosen event library does not come with a timing source of its own. The
2579	pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to	2833	pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2580	try to use a monotonic clock for timing stability.	2834	try to use a monotonic clock for timing stability.
2581		2835
2582	=back	2836	=back
2583		2837
2584		2838
…		…
2650		2904
2651	Tutorial/Introduction: L<AnyEvent::Intro>.	2905	Tutorial/Introduction: L<AnyEvent::Intro>.
2652		2906
2653	FAQ: L<AnyEvent::FAQ>.	2907	FAQ: L<AnyEvent::FAQ>.
2654		2908
2655	Utility functions: L<AnyEvent::Util>.	2909	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		2910	(simply logging).
2656		2911
2657	Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>,	2912	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
2658	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2913	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		2914
		2915	Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>,
		2916	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		2917	L<Qt>, L<POE>, L<FLTK>.
2659		2918
2660	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2919	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2661	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	2920	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2662	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2921	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2663	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	2922	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		2923	L<AnyEvent::Impl::FLTK>.
2664		2924
2665	Non-blocking file handles, sockets, TCP clients and	2925	Non-blocking handles, pipes, stream sockets, TCP clients and
2666	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2926	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2667		2927
2668	Asynchronous DNS: L<AnyEvent::DNS>.	2928	Asynchronous DNS: L<AnyEvent::DNS>.
2669		2929
2670	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.	2930	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.347 by root, Sun Jan 23 11:15:09 2011 UTC vs. Revision 1.375 by root, Thu Aug 25 05:39:47 2011 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.347 by root, Sun Jan 23 11:15:09 2011 UTC vs.
Revision 1.375 by root, Thu Aug 25 05:39:47 2011 UTC