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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.354 by root, Thu Aug 11 21:26:39 2011 UTC vs.
Revision 1.390 by root, Tue Oct 4 17:45:04 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
415	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's	415	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's
416	pure perl implementation).	416	pure perl implementation).
417		417
418	=head3 Safe/Unsafe Signals	418	=head3 Safe/Unsafe Signals
419		419
420	Perl signals can be either "safe" (synchronous to opcode handling) or	420	Perl signals can be either "safe" (synchronous to opcode handling)
421	"unsafe" (asynchronous) - the former might get delayed indefinitely, the	421	or "unsafe" (asynchronous) - the former might delay signal delivery
422	latter might corrupt your memory.	422	indefinitely, the latter might corrupt your memory.
423		423
424	AnyEvent signal handlers are, in addition, synchronous to the event loop,	424	AnyEvent signal handlers are, in addition, synchronous to the event loop,
425	i.e. they will not interrupt your running perl program but will only be	425	i.e. they will not interrupt your running perl program but will only be
426	called as part of the normal event handling (just like timer, I/O etc.	426	called as part of the normal event handling (just like timer, I/O etc.
427	callbacks, too).	427	callbacks, too).
428		428
429	=head3 Signal Races, Delays and Workarounds	429	=head3 Signal Races, Delays and Workarounds
430		430
431	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching	431	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support
432	callbacks to signals in a generic way, which is a pity, as you cannot	432	attaching callbacks to signals in a generic way, which is a pity,
433	do race-free signal handling in perl, requiring C libraries for	433	as you cannot do race-free signal handling in perl, requiring
434	this. AnyEvent will try to do its best, which means in some cases,	434	C libraries for this. AnyEvent will try to do its best, which
435	signals will be delayed. The maximum time a signal might be delayed is	435	means in some cases, signals will be delayed. The maximum time
436	specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This	436	a signal might be delayed is 10 seconds by default, but can
437	variable can be changed only before the first signal watcher is created,	437	be overriden via C<$ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY}> or
438	and should be left alone otherwise. This variable determines how often	438	C<$AnyEvent::MAX_SIGNAL_LATENCY> - see the Ö<ENVIRONMENT VARIABLES>
439	AnyEvent polls for signals (in case a wake-up was missed). Higher values	439	section for details.
440	will cause fewer spurious wake-ups, which is better for power and CPU
441	saving.
442		440
443	All these problems can be avoided by installing the optional	441	All these problems can be avoided by installing the optional
444	L<Async::Interrupt> module, which works with most event loops. It will not	442	L<Async::Interrupt> module, which works with most event loops. It will not
445	work with inherently broken event loops such as L<Event> or L<Event::Lib>	443	work with inherently broken event loops such as L<Event> or L<Event::Lib>
446	(and not with L<POE> currently, as POE does its own workaround with	444	(and not with L<POE> currently). For those, you just have to suffer the
447	one-second latency). For those, you just have to suffer the delays.	445	delays.
448		446
449	=head2 CHILD PROCESS WATCHERS	447	=head2 CHILD PROCESS WATCHERS
450		448
451	$w = AnyEvent->child (pid => <process id>, cb => <callback>);	449	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
452		450
…		…
878	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	876	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
879	AnyEvent::Impl::POE based on POE, very slow, some limitations.	877	AnyEvent::Impl::POE based on POE, very slow, some limitations.
880	AnyEvent::Impl::Irssi used when running within irssi.	878	AnyEvent::Impl::Irssi used when running within irssi.
881	AnyEvent::Impl::IOAsync based on IO::Async.	879	AnyEvent::Impl::IOAsync based on IO::Async.
882	AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.	880	AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.
883	AnyEvent::Impl::FLTK based on FLTK.	881	AnyEvent::Impl::FLTK based on FLTK (fltk 2 binding).
884		882
885	=item Backends with special needs.	883	=item Backends with special needs.
886		884
887	Qt requires the Qt::Application to be instantiated first, but will	885	Qt requires the Qt::Application to be instantiated first, but will
888	otherwise be picked up automatically. As long as the main program	886	otherwise be picked up automatically. As long as the main program
…		…
933		931
934	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model	932	Returns C<$AnyEvent::MODEL>, forcing autodetection of the event model
935	if necessary. You should only call this function right before you would	933	if necessary. You should only call this function right before you would
936	have created an AnyEvent watcher anyway, that is, as late as possible at	934	have created an AnyEvent watcher anyway, that is, as late as possible at
937	runtime, and not e.g. during initialisation of your module.	935	runtime, and not e.g. during initialisation of your module.
		936
		937	The effect of calling this function is as if a watcher had been created
		938	(specifically, actions that happen "when the first watcher is created"
		939	happen when calling detetc as well).
938		940
939	If you need to do some initialisation before AnyEvent watchers are	941	If you need to do some initialisation before AnyEvent watchers are
940	created, use C<post_detect>.	942	created, use C<post_detect>.
941		943
942	=item $guard = AnyEvent::post_detect { BLOCK }	944	=item $guard = AnyEvent::post_detect { BLOCK }
…		…
1045	It should use C<postpone>:	1047	It should use C<postpone>:
1046		1048
1047	AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later	1049	AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later
1048	if $some_error_condition;	1050	if $some_error_condition;
1049		1051
		1052	=item AnyEvent::log $level, $msg[, @args]
		1053
		1054	Log the given C<$msg> at the given C<$level>.
		1055
		1056	If L<AnyEvent::Log> is not loaded then this function makes a simple test
		1057	to see whether the message will be logged. If the test succeeds it will
		1058	load AnyEvent::Log and call C<AnyEvent::Log::log> - consequently, look at
		1059	the L<AnyEvent::Log> documentation for details.
		1060
		1061	If the test fails it will simply return. Right now this happens when a
		1062	numerical loglevel is used and it is larger than the level specified via
		1063	C<$ENV{PERL_ANYEVENT_VERBOSE}>.
		1064
		1065	If you want to sprinkle loads of logging calls around your code, consider
		1066	creating a logger callback with the C<AnyEvent::Log::logger> function,
		1067	which can reduce typing, codesize and can reduce the logging overhead
		1068	enourmously.
		1069
1050	=back	1070	=back
1051		1071
1052	=head1 WHAT TO DO IN A MODULE	1072	=head1 WHAT TO DO IN A MODULE
1053		1073
1054	As a module author, you should C<use AnyEvent> and call AnyEvent methods	1074	As a module author, you should C<use AnyEvent> and call AnyEvent methods
…		…
1110		1130
1111		1131
1112	=head1 OTHER MODULES	1132	=head1 OTHER MODULES
1113		1133
1114	The following is a non-exhaustive list of additional modules that use	1134	The following is a non-exhaustive list of additional modules that use
1115	AnyEvent as a client and can therefore be mixed easily with other AnyEvent	1135	AnyEvent as a client and can therefore be mixed easily with other
1116	modules and other event loops in the same program. Some of the modules	1136	AnyEvent modules and other event loops in the same program. Some of the
1117	come as part of AnyEvent, the others are available via CPAN.	1137	modules come as part of AnyEvent, the others are available via CPAN (see
		1138	L<http://search.cpan.org/search?m=module&q=anyevent%3A%3A*> for
		1139	a longer non-exhaustive list), and the list is heavily biased towards
		1140	modules of the AnyEvent author himself :)
1118		1141
1119	=over 4	1142	=over 4
1120		1143
1121	=item L<AnyEvent::Util>	1144	=item L<AnyEvent::Util>
1122		1145
…		…
1142	=item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP>	1165	=item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP>
1143		1166
1144	Implement event-based interfaces to the protocols of the same name (for	1167	Implement event-based interfaces to the protocols of the same name (for
1145	the curious, IGS is the International Go Server and FCP is the Freenet	1168	the curious, IGS is the International Go Server and FCP is the Freenet
1146	Client Protocol).	1169	Client Protocol).
1147
1148	=item L<AnyEvent::Handle::UDP>
1149
1150	Here be danger!
1151
1152	As Pauli would put it, "Not only is it not right, it's not even wrong!" -
1153	there are so many things wrong with AnyEvent::Handle::UDP, most notably
1154	its use of a stream-based API with a protocol that isn't streamable, that
1155	the only way to improve it is to delete it.
1156
1157	It features data corruption (but typically only under load) and general
1158	confusion. On top, the author is not only clueless about UDP but also
1159	fact-resistant - some gems of his understanding: "connect doesn't work
1160	with UDP", "UDP packets are not IP packets", "UDP only has datagrams, not
1161	packets", "I don't need to implement proper error checking as UDP doesn't
1162	support error checking" and so on - he doesn't even understand what's
1163	wrong with his module when it is explained to him.
1164
1165	=item L<AnyEvent::DBI>
1166
1167	Executes L<DBI> requests asynchronously in a proxy process for you,
1168	notifying you in an event-based way when the operation is finished.
1169		1170
1170	=item L<AnyEvent::AIO>	1171	=item L<AnyEvent::AIO>
1171		1172
1172	Truly asynchronous (as opposed to non-blocking) I/O, should be in the	1173	Truly asynchronous (as opposed to non-blocking) I/O, should be in the
1173	toolbox of every event programmer. AnyEvent::AIO transparently fuses	1174	toolbox of every event programmer. AnyEvent::AIO transparently fuses
1174	L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based	1175	L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based
1175	file I/O, and much more.	1176	file I/O, and much more.
1176		1177
		1178	=item L<AnyEvent::Filesys::Notify>
		1179
		1180	AnyEvent is good for non-blocking stuff, but it can't detect file or
		1181	path changes (e.g. "watch this directory for new files", "watch this
		1182	file for changes"). The L<AnyEvent::Filesys::Notify> module promises to
		1183	do just that in a portbale fashion, supporting inotify on GNU/Linux and
		1184	some weird, without doubt broken, stuff on OS X to monitor files. It can
		1185	fall back to blocking scans at regular intervals transparently on other
		1186	platforms, so it's about as portable as it gets.
		1187
		1188	(I haven't used it myself, but I haven't heard anybody complaining about
		1189	it yet).
		1190
		1191	=item L<AnyEvent::DBI>
		1192
		1193	Executes L<DBI> requests asynchronously in a proxy process for you,
		1194	notifying you in an event-based way when the operation is finished.
		1195
1177	=item L<AnyEvent::HTTPD>	1196	=item L<AnyEvent::HTTPD>
1178		1197
1179	A simple embedded webserver.	1198	A simple embedded webserver.
1180		1199
1181	=item L<AnyEvent::FastPing>	1200	=item L<AnyEvent::FastPing>
1182		1201
1183	The fastest ping in the west.	1202	The fastest ping in the west.
1184		1203
1185	=item L<Coro>	1204	=item L<Coro>
1186		1205
1187	Has special support for AnyEvent via L<Coro::AnyEvent>.	1206	Has special support for AnyEvent via L<Coro::AnyEvent>, which allows you
		1207	to simply invert the flow control - don't call us, we will call you:
		1208
		1209	async {
		1210	Coro::AnyEvent::sleep 5; # creates a 5s timer and waits for it
		1211	print "5 seconds later!\n";
		1212
		1213	Coro::AnyEvent::readable *STDIN; # uses an I/O watcher
		1214	my $line = <STDIN>; # works for ttys
		1215
		1216	AnyEvent::HTTP::http_get "url", Coro::rouse_cb;
		1217	my ($body, $hdr) = Coro::rouse_wait;
		1218	};
1188		1219
1189	=back	1220	=back
1190		1221
1191	=cut	1222	=cut
1192		1223
…		…
1202		1233
1203	BEGIN { AnyEvent::common_sense }	1234	BEGIN { AnyEvent::common_sense }
1204		1235
1205	use Carp ();	1236	use Carp ();
1206		1237
1207	our $VERSION = '5.34';	1238	our $VERSION = '6.1';
1208	our $MODEL;	1239	our $MODEL;
1209
1210	our $AUTOLOAD;
1211	our @ISA;	1240	our @ISA;
1212
1213	our @REGISTRY;	1241	our @REGISTRY;
1214
1215	our $VERBOSE;	1242	our $VERBOSE;
		1243	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
		1244	our $MAX_SIGNAL_LATENCY = $ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY} \|\| 10; # executes after the BEGIN block below (tainting!)
1216		1245
1217	BEGIN {	1246	BEGIN {
1218	require "AnyEvent/constants.pl";	1247	require "AnyEvent/constants.pl";
1219		1248
1220	eval "sub TAINT (){" . (${^TAINT}*1) . "}";	1249	eval "sub TAINT (){" . (${^TAINT}*1) . "}";
1221		1250
1222	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1251	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1223	if ${^TAINT};	1252	if ${^TAINT};
1224		1253
1225	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1254	$ENV{"PERL_ANYEVENT_$_"} = $ENV{"AE_$_"}
		1255	for grep s/^AE_// && !exists $ENV{"PERL_ANYEVENT_$_"}, keys %ENV;
1226		1256
1227	}	1257	@ENV{grep /^PERL_ANYEVENT_/, keys %ENV} = ()
		1258	if ${^TAINT};
1228		1259
1229	our $MAX_SIGNAL_LATENCY = 10;	1260	# $ENV{PERL_ANYEVENT_xxx} now valid
1230		1261
1231	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred	1262	$VERBOSE = length $ENV{PERL_ANYEVENT_VERBOSE} ? $ENV{PERL_ANYEVENT_VERBOSE}*1 : 4;
1232		1263
1233	{
1234	my $idx;	1264	my $idx;
1235	$PROTOCOL{$_} = ++$idx	1265	$PROTOCOL{$_} = ++$idx
1236	for reverse split /\s,\s/,	1266	for reverse split /\s,\s/,
1237	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1267	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1238	}	1268	}
1239		1269
		1270	our @post_detect;
		1271
		1272	sub post_detect(&) {
		1273	my ($cb) = @_;
		1274
		1275	push @post_detect, $cb;
		1276
		1277	defined wantarray
		1278	? bless \$cb, "AnyEvent::Util::postdetect"
		1279	: ()
		1280	}
		1281
		1282	sub AnyEvent::Util::postdetect::DESTROY {
		1283	@post_detect = grep $_ != ${$_[0]}, @post_detect;
		1284	}
		1285
		1286	our $POSTPONE_W;
		1287	our @POSTPONE;
		1288
		1289	sub _postpone_exec {
		1290	undef $POSTPONE_W;
		1291
		1292	&{ shift @POSTPONE }
		1293	while @POSTPONE;
		1294	}
		1295
		1296	sub postpone(&) {
		1297	push @POSTPONE, shift;
		1298
		1299	$POSTPONE_W \|\|= AE::timer (0, 0, \&_postpone_exec);
		1300
		1301	()
		1302	}
		1303
		1304	sub log($$;@) {
		1305	# only load the big bloated module when we actually are about to log something
		1306	if ($_[0] <= ($VERBOSE \|\| 1)) { # also catches non-numeric levels(!) and fatal
		1307	local ($!, $@);
		1308	require AnyEvent::Log; # among other things, sets $VERBOSE to 9
		1309	# AnyEvent::Log overwrites this function
		1310	goto &log;
		1311	}
		1312
		1313	0 # not logged
		1314	}
		1315
		1316	sub _logger($;$) {
		1317	my ($level, $renabled) = @_;
		1318
		1319	$$renabled = $level <= $VERBOSE;
		1320
		1321	my $logger = [(caller)[0], $level, $renabled];
		1322
		1323	$AnyEvent::Log::LOGGER{$logger+0} = $logger;
		1324
		1325	# return unless defined wantarray;
		1326	#
		1327	# require AnyEvent::Util;
		1328	# my $guard = AnyEvent::Util::guard (sub {
		1329	# # "clean up"
		1330	# delete $LOGGER{$logger+0};
		1331	# });
		1332	#
		1333	# sub {
		1334	# return 0 unless $$renabled;
		1335	#
		1336	# $guard if 0; # keep guard alive, but don't cause runtime overhead
		1337	# require AnyEvent::Log unless $AnyEvent::Log::VERSION;
		1338	# package AnyEvent::Log;
		1339	# _log ($logger->[0], $level, @_) # logger->[0] has been converted at load time
		1340	# }
		1341	}
		1342
		1343	if (length $ENV{PERL_ANYEVENT_LOG}) {
		1344	require AnyEvent::Log; # AnyEvent::Log does the thing for us
		1345	}
		1346
1240	my @models = (	1347	our @models = (
1241	[EV:: => AnyEvent::Impl::EV:: , 1],	1348	[EV:: => AnyEvent::Impl::EV::],
1242	[AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],	1349	[AnyEvent::Loop:: => AnyEvent::Impl::Perl::],
1243	# everything below here will not (normally) be autoprobed	1350	# everything below here will not (normally) be autoprobed
1244	# as the pure perl backend should work everywhere	1351	# as the pure perl backend should work everywhere
1245	# and is usually faster	1352	# and is usually faster
		1353	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package, so msut be near the top
1246	[Event:: => AnyEvent::Impl::Event::, 1],	1354	[Event:: => AnyEvent::Impl::Event::], # slow, stable
1247	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1355	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers
		1356	# everything below here should not be autoloaded
1248	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1357	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1249	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1250	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1358	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1251	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1359	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1252	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1360	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1253	[Wx:: => AnyEvent::Impl::POE::],	1361	[Wx:: => AnyEvent::Impl::POE::],
1254	[Prima:: => AnyEvent::Impl::POE::],	1362	[Prima:: => AnyEvent::Impl::POE::],
1255	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::],	1363	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1256	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],	1364	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1257	[FLTK:: => AnyEvent::Impl::FLTK::],	1365	[FLTK:: => AnyEvent::Impl::FLTK::],
1258	);	1366	);
1259		1367
1260	our %method = map +($_ => 1),	1368	our @isa_hook;
		1369
		1370	sub _isa_set {
		1371	my @pkg = ("AnyEvent", (map $_->[0], grep defined, @isa_hook), $MODEL);
		1372
		1373	@{"$pkg[$_-1]::ISA"} = $pkg[$_]
		1374	for 1 .. $#pkg;
		1375
		1376	grep $_ && $_->[1], @isa_hook
		1377	and AE::_reset ();
		1378	}
		1379
		1380	# used for hooking AnyEvent::Strict and AnyEvent::Debug::Wrap into the class hierarchy
		1381	sub _isa_hook($$;$) {
		1382	my ($i, $pkg, $reset_ae) = @_;
		1383
		1384	$isa_hook[$i] = $pkg ? [$pkg, $reset_ae] : undef;
		1385
		1386	_isa_set;
		1387	}
		1388
		1389	# all autoloaded methods reserve the complete glob, not just the method slot.
		1390	# due to bugs in perls method cache implementation.
1261	qw(io timer time now now_update signal child idle condvar DESTROY);	1391	our @methods = qw(io timer time now now_update signal child idle condvar);
1262
1263	our @post_detect;
1264
1265	sub post_detect(&) {
1266	my ($cb) = @_;
1267
1268	push @post_detect, $cb;
1269
1270	defined wantarray
1271	? bless \$cb, "AnyEvent::Util::postdetect"
1272	: ()
1273	}
1274
1275	sub AnyEvent::Util::postdetect::DESTROY {
1276	@post_detect = grep $_ != ${$_[0]}, @post_detect;
1277	}
1278		1392
1279	sub detect() {	1393	sub detect() {
		1394	return $MODEL if $MODEL; # some programs keep references to detect
		1395
		1396	# IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it
		1397	# the author knows about the problems and what it does to AnyEvent as a whole
		1398	# (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent
		1399	# anyway.
		1400	AnyEvent::log fatal => "AnyEvent: IO::Async::Loop::AnyEvent detected - this module is broken by design,\n"
		1401	. "abuses internals and breaks AnyEvent, will not continue."
		1402	if exists $INC{"IO/Async/Loop/AnyEvent.pm"};
		1403
		1404	local $!; # for good measure
		1405	local $SIG{__DIE__}; # we use eval
		1406
1280	# free some memory	1407	# free some memory
1281	*detect = sub () { $MODEL };	1408	*detect = sub () { $MODEL };
		1409	# undef &func doesn't correctly update the method cache. grmbl.
		1410	# so we delete the whole glob. grmbl.
		1411	# otoh, perl doesn't let me undef an active usb, but it lets me free
		1412	# a glob with an active sub. hrm. i hope it works, but perl is
		1413	# usually buggy in this department. sigh.
		1414	delete @{"AnyEvent::"}{@methods};
		1415	undef @methods;
1282		1416
1283	local $!; # for good measure
1284	local $SIG{__DIE__};
1285
1286	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1417	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1287	my $model = "AnyEvent::Impl::$1";	1418	my $model = $1;
		1419	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1288	if (eval "require $model") {	1420	if (eval "require $model") {
		1421	AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1289	$MODEL = $model;	1422	$MODEL = $model;
1290	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1291	} else {	1423	} else {
1292	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1424	AnyEvent::log 4 => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1293	}	1425	}
1294	}	1426	}
1295		1427
1296	# check for already loaded models	1428	# check for already loaded models
1297	unless ($MODEL) {	1429	unless ($MODEL) {
1298	for (@REGISTRY, @models) {	1430	for (@REGISTRY, @models) {
1299	my ($package, $model) = @$_;	1431	my ($package, $model) = @$_;
1300	if (${"$package\::VERSION"} > 0) {	1432	if (${"$package\::VERSION"} > 0) {
1301	if (eval "require $model") {	1433	if (eval "require $model") {
		1434	AnyEvent::log 7 => "autodetected model '$model', using it.";
1302	$MODEL = $model;	1435	$MODEL = $model;
1303	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;
1304	last;	1436	last;
1305	}	1437	}
1306	}	1438	}
1307	}	1439	}
1308		1440
1309	unless ($MODEL) {	1441	unless ($MODEL) {
1310	# try to autoload a model	1442	# try to autoload a model
1311	for (@REGISTRY, @models) {	1443	for (@REGISTRY, @models) {
1312	my ($package, $model, $autoload) = @$_;	1444	my ($package, $model) = @$_;
1313	if (	1445	if (
1314	$autoload
1315	and eval "require $package"	1446	eval "require $package"
1316	and ${"$package\::VERSION"} > 0	1447	and ${"$package\::VERSION"} > 0
1317	and eval "require $model"	1448	and eval "require $model"
1318	) {	1449	) {
		1450	AnyEvent::log 7 => "autoloaded model '$model', using it.";
1319	$MODEL = $model;	1451	$MODEL = $model;
1320	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1321	last;	1452	last;
1322	}	1453	}
1323	}	1454	}
1324		1455
1325	$MODEL	1456	$MODEL
1326	or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";	1457	or AnyEvent::log fatal => "AnyEvent: backend autodetection failed - did you properly install AnyEvent?";
1327	}	1458	}
1328	}	1459	}
1329		1460
1330	@models = (); # free probe data	1461	# free memory only needed for probing
		1462	undef @models;
		1463	undef @REGISTRY;
1331		1464
1332	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1465	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1333	unshift @ISA, $MODEL;
1334		1466
1335	# now nuke some methods that are overridden by the backend.	1467	# now nuke some methods that are overridden by the backend.
1336	# SUPER is not allowed.	1468	# SUPER usage is not allowed in these.
1337	for (qw(time signal child idle)) {	1469	for (qw(time signal child idle)) {
1338	undef &{"AnyEvent::Base::$_"}	1470	undef &{"AnyEvent::Base::$_"}
1339	if defined &{"$MODEL\::$_"};	1471	if defined &{"$MODEL\::$_"};
1340	}	1472	}
1341		1473
		1474	_isa_set;
		1475
		1476	# we're officially open!
		1477
1342	if ($ENV{PERL_ANYEVENT_STRICT}) {	1478	if ($ENV{PERL_ANYEVENT_STRICT}) {
1343	eval { require AnyEvent::Strict };	1479	require AnyEvent::Strict;
1344	warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1345	if $@ && $VERBOSE;
1346	}	1480	}
1347		1481
		1482	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1483	require AnyEvent::Debug;
		1484	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1485	}
		1486
		1487	if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1488	require AnyEvent::Socket;
		1489	require AnyEvent::Debug;
		1490
		1491	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1492	$shell =~ s/\$\$/$$/g;
		1493
		1494	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1495	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1496	}
		1497
		1498	# now the anyevent environment is set up as the user told us to, so
		1499	# call the actual user code - post detects
		1500
1348	(shift @post_detect)->() while @post_detect;	1501	(shift @post_detect)->() while @post_detect;
		1502	undef @post_detect;
1349		1503
1350	*post_detect = sub(&) {	1504	*post_detect = sub(&) {
1351	shift->();	1505	shift->();
1352		1506
1353	undef	1507	undef
1354	};	1508	};
1355		1509
1356	$MODEL	1510	$MODEL
1357	}	1511	}
1358		1512
1359	sub AUTOLOAD {	1513	for my $name (@methods) {
1360	(my $func = $AUTOLOAD) =~ s/.*://;	1514	*$name = sub {
1361
1362	$method{$func}
1363	or Carp::croak "$func: not a valid AnyEvent class method";
1364
1365	detect;	1515	detect;
1366		1516	# we use goto because
1367	my $class = shift;	1517	# a) it makes the thunk more transparent
1368	$class->$func (@_);	1518	# b) it allows us to delete the thunk later
1369	}	1519	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
1370		1520	};
1371	our $POSTPONE_W;
1372	our @POSTPONE;
1373
1374	sub _postpone_exec {
1375	undef $POSTPONE_W;
1376	(pop @POSTPONE)->()
1377	while @POSTPONE;
1378	}
1379
1380	sub postpone(&) {
1381	push @POSTPONE, shift;
1382
1383	$POSTPONE_W \|\|= AE::timer (0, 0, \&_postpone_exec);
1384
1385	()
1386	}	1521	}
1387		1522
1388	# utility function to dup a filehandle. this is used by many backends	1523	# utility function to dup a filehandle. this is used by many backends
1389	# to support binding more than one watcher per filehandle (they usually	1524	# to support binding more than one watcher per filehandle (they usually
1390	# allow only one watcher per fd, so we dup it to get a different one).	1525	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1414		1549
1415	package AE;	1550	package AE;
1416		1551
1417	our $VERSION = $AnyEvent::VERSION;	1552	our $VERSION = $AnyEvent::VERSION;
1418		1553
		1554	sub _reset() {
		1555	eval q{
1419	# fall back to the main API by default - backends and AnyEvent::Base	1556	# fall back to the main API by default - backends and AnyEvent::Base
1420	# implementations can overwrite these.	1557	# implementations can overwrite these.
1421		1558
1422	sub io($$$) {	1559	sub io($$$) {
1423	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1560	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1424	}	1561	}
1425		1562
1426	sub timer($$$) {	1563	sub timer($$$) {
1427	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1564	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1428	}	1565	}
1429		1566
1430	sub signal($$) {	1567	sub signal($$) {
1431	AnyEvent->signal (signal => $_[0], cb => $_[1])	1568	AnyEvent->signal (signal => $_[0], cb => $_[1])
1432	}	1569	}
1433		1570
1434	sub child($$) {	1571	sub child($$) {
1435	AnyEvent->child (pid => $_[0], cb => $_[1])	1572	AnyEvent->child (pid => $_[0], cb => $_[1])
1436	}	1573	}
1437		1574
1438	sub idle($) {	1575	sub idle($) {
1439	AnyEvent->idle (cb => $_[0])	1576	AnyEvent->idle (cb => $_[0]);
1440	}	1577	}
1441		1578
1442	sub cv(;&) {	1579	sub cv(;&) {
1443	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1580	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1444	}	1581	}
1445		1582
1446	sub now() {	1583	sub now() {
1447	AnyEvent->now	1584	AnyEvent->now
1448	}	1585	}
1449		1586
1450	sub now_update() {	1587	sub now_update() {
1451	AnyEvent->now_update	1588	AnyEvent->now_update
1452	}	1589	}
1453		1590
1454	sub time() {	1591	sub time() {
1455	AnyEvent->time	1592	AnyEvent->time
1456	}	1593	}
1457		1594
1458	*postpone = \&AnyEvent::postpone;	1595	*postpone = \&AnyEvent::postpone;
		1596	*log = \&AnyEvent::log;
		1597	};
		1598	die if $@;
		1599	}
		1600
		1601	BEGIN { _reset }
1459		1602
1460	package AnyEvent::Base;	1603	package AnyEvent::Base;
1461		1604
1462	# default implementations for many methods	1605	# default implementations for many methods
1463		1606
1464	sub time {	1607	sub time {
1465	eval q{ # poor man's autoloading {}	1608	eval q{ # poor man's autoloading {}
1466	# probe for availability of Time::HiRes	1609	# probe for availability of Time::HiRes
1467	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1610	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1468	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1611	*time = sub { Time::HiRes::time () };
1469	*AE::time = \&Time::HiRes::time;	1612	*AE::time = \& Time::HiRes::time ;
		1613	*now = \&time;
		1614	AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy.";
1470	# if (eval "use POSIX (); (POSIX::times())...	1615	# if (eval "use POSIX (); (POSIX::times())...
1471	} else {	1616	} else {
		1617	*time = sub { CORE::time };
		1618	*AE::time = sub (){ CORE::time };
		1619	*now = \&time;
1472	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1620	AnyEvent::log 3 => "using built-in time(), WARNING, no sub-second resolution!";
1473	*AE::time = sub (){ time }; # epic fail
1474	}	1621	}
1475
1476	*time = sub { AE::time }; # different prototypes
1477	};	1622	};
1478	die if $@;	1623	die if $@;
1479		1624
1480	&time	1625	&time
1481	}	1626	}
1482		1627
1483	*now = \&time;	1628	*now = \&time;
1484
1485	sub now_update { }	1629	sub now_update { }
1486		1630
1487	sub _poll {	1631	sub _poll {
1488	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";	1632	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
1489	}	1633	}
…		…
1575		1719
1576	sub signal {	1720	sub signal {
1577	eval q{ # poor man's autoloading {}	1721	eval q{ # poor man's autoloading {}
1578	# probe for availability of Async::Interrupt	1722	# probe for availability of Async::Interrupt
1579	if (_have_async_interrupt) {	1723	if (_have_async_interrupt) {
1580	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1724	AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling.";
1581		1725
1582	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1726	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1583	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1727	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1584		1728
1585	} else {	1729	} else {
1586	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1730	AnyEvent::log 8 => "using emulated perl signal handling with latency timer.";
1587		1731
1588	if (AnyEvent::WIN32) {	1732	if (AnyEvent::WIN32) {
1589	require AnyEvent::Util;	1733	require AnyEvent::Util;
1590		1734
1591	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1735	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1667	: sysread $SIGPIPE_R, (my $dummy), 9;	1811	: sysread $SIGPIPE_R, (my $dummy), 9;
1668		1812
1669	while (%SIG_EV) {	1813	while (%SIG_EV) {
1670	for (keys %SIG_EV) {	1814	for (keys %SIG_EV) {
1671	delete $SIG_EV{$_};	1815	delete $SIG_EV{$_};
1672	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1816	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1673	}	1817	}
1674	}	1818	}
1675	};	1819	};
1676	};	1820	};
1677	die if $@;	1821	die if $@;
…		…
1744		1888
1745	my ($cb, $w, $rcb) = $arg{cb};	1889	my ($cb, $w, $rcb) = $arg{cb};
1746		1890
1747	$rcb = sub {	1891	$rcb = sub {
1748	if ($cb) {	1892	if ($cb) {
1749	$w = _time;	1893	$w = AE::time;
1750	&$cb;	1894	&$cb;
1751	$w = _time - $w;	1895	$w = AE::time - $w;
1752		1896
1753	# never use more then 50% of the time for the idle watcher,	1897	# never use more then 50% of the time for the idle watcher,
1754	# within some limits	1898	# within some limits
1755	$w = 0.0001 if $w < 0.0001;	1899	$w = 0.0001 if $w < 0.0001;
1756	$w = 5 if $w > 5;	1900	$w = 5 if $w > 5;
…		…
1885	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and	2029	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
1886	so on.	2030	so on.
1887		2031
1888	=head1 ENVIRONMENT VARIABLES	2032	=head1 ENVIRONMENT VARIABLES
1889		2033
1890	The following environment variables are used by this module or its	2034	AnyEvent supports a number of environment variables that tune the
1891	submodules.	2035	runtime behaviour. They are usually evaluated when AnyEvent is
		2036	loaded, initialised, or a submodule that uses them is loaded. Many of
		2037	them also cause AnyEvent to load additional modules - for example,
		2038	C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be
		2039	loaded.
1892		2040
1893	Note that AnyEvent will remove I<all> environment variables starting with	2041	All the environment variables documented here start with
1894	C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is	2042	C<PERL_ANYEVENT_>, which is what AnyEvent considers its own
1895	enabled.	2043	namespace. Other modules are encouraged (but by no means required) to use
		2044	C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule
		2045	namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could
		2046	be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env
		2047	variables starting with C<AE_>, see below).
		2048
		2049	All variables can also be set via the C<AE_> prefix, that is, instead
		2050	of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In
		2051	case there is a clash btween anyevent and another program that uses
		2052	C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something>
		2053	variable to the empty string, as those variables take precedence.
		2054
		2055	When AnyEvent is first loaded, it copies all C<AE_xxx> env variables
		2056	to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already
		2057	exists. If taint mode is on, then AnyEvent will remove I<all> environment
		2058	variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them
		2059	with C<undef> or the empty string, if the corresaponding C<AE_> variable
		2060	is set).
		2061
		2062	The exact algorithm is currently:
		2063
		2064	1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV
		2065	2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists
		2066	3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef.
		2067
		2068	This ensures that child processes will not see the C<AE_> variables.
		2069
		2070	The following environment variables are currently known to AnyEvent:
1896		2071
1897	=over 4	2072	=over 4
1898		2073
1899	=item C<PERL_ANYEVENT_VERBOSE>	2074	=item C<PERL_ANYEVENT_VERBOSE>
1900		2075
1901	By default, AnyEvent will be completely silent except in fatal	2076	By default, AnyEvent will only log messages with loglevel C<3>
1902	conditions. You can set this environment variable to make AnyEvent more	2077	(C<critical>) or higher (see L<AnyEvent::Log>). You can set this
		2078	environment variable to a numerical loglevel to make AnyEvent more (or
1903	talkative.	2079	less) talkative.
1904		2080
		2081	If you want to do more than just set the global logging level
		2082	you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
		2083	complex specifications.
		2084
		2085	When set to C<0> (C<off>), then no messages whatsoever will be logged with
		2086	the default logging settings.
		2087
1905	When set to C<1> or higher, causes AnyEvent to warn about unexpected	2088	When set to C<5> or higher (C<warn>), causes AnyEvent to warn about
1906	conditions, such as not being able to load the event model specified by	2089	unexpected conditions, such as not being able to load the event model
1907	C<PERL_ANYEVENT_MODEL>.	2090	specified by C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an
		2091	exception - this is the minimum recommended level.
1908		2092
1909	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	2093	When set to C<7> or higher (info), cause AnyEvent to report which event model it
1910	model it chooses.	2094	chooses.
1911		2095
1912	When set to C<8> or higher, then AnyEvent will report extra information on	2096	When set to C<8> or higher (debug), then AnyEvent will report extra information on
1913	which optional modules it loads and how it implements certain features.	2097	which optional modules it loads and how it implements certain features.
		2098
		2099	=item C<PERL_ANYEVENT_LOG>
		2100
		2101	Accepts rather complex logging specifications. For example, you could log
		2102	all C<debug> messages of some module to stderr, warnings and above to
		2103	stderr, and errors and above to syslog, with:
		2104
		2105	PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog
		2106
		2107	For the rather extensive details, see L<AnyEvent::Log>.
		2108
		2109	This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
		2110	so will take effect even before AnyEvent has initialised itself.
		2111
		2112	Note that specifying this environment variable causes the L<AnyEvent::Log>
		2113	module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
		2114	using the latter saves a few hundred kB of memory until the first message
		2115	is being logged.
1914		2116
1915	=item C<PERL_ANYEVENT_STRICT>	2117	=item C<PERL_ANYEVENT_STRICT>
1916		2118
1917	AnyEvent does not do much argument checking by default, as thorough	2119	AnyEvent does not do much argument checking by default, as thorough
1918	argument checking is very costly. Setting this variable to a true value	2120	argument checking is very costly. Setting this variable to a true value
…		…
1925	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>	2127	Unlike C<use strict> (or its modern cousin, C<< use L<common::sense>
1926	>>, it is definitely recommended to keep it off in production. Keeping	2128	>>, it is definitely recommended to keep it off in production. Keeping
1927	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2129	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1928	can be very useful, however.	2130	can be very useful, however.
1929		2131
		2132	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2133
		2134	If this env variable is nonempty, then its contents will be interpreted by
		2135	C<AnyEvent::Socket::parse_hostport> and C<AnyEvent::Debug::shell> (after
		2136	replacing every occurance of C<$$> by the process pid). The shell object
		2137	is saved in C<$AnyEvent::Debug::SHELL>.
		2138
		2139	This happens when the first watcher is created.
		2140
		2141	For example, to bind a debug shell on a unix domain socket in
		2142	F<< /tmp/debug<pid>.sock >>, you could use this:
		2143
		2144	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2145	# connect with e.g.: socat readline /tmp/debug123.sock
		2146
		2147	Or to bind to tcp port 4545 on localhost:
		2148
		2149	PERL_ANYEVENT_DEBUG_SHELL=127.0.0.1:4545 perlprog
		2150	# connect with e.g.: telnet localhost 4545
		2151
		2152	Note that creating sockets in F</tmp> or on localhost is very unsafe on
		2153	multiuser systems.
		2154
		2155	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2156
		2157	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2158	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2159
1930	=item C<PERL_ANYEVENT_MODEL>	2160	=item C<PERL_ANYEVENT_MODEL>
1931		2161
1932	This can be used to specify the event model to be used by AnyEvent, before	2162	This can be used to specify the event model to be used by AnyEvent, before
1933	auto detection and -probing kicks in. It must be a string consisting	2163	auto detection and -probing kicks in.
1934	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2164
		2165	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2166	or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1935	and the resulting module name is loaded and if the load was successful,	2167	resulting module name is loaded and - if the load was successful - used as
1936	used as event model. If it fails to load AnyEvent will proceed with	2168	event model backend. If it fails to load then AnyEvent will proceed with
1937	auto detection and -probing.	2169	auto detection and -probing.
1938		2170
1939	This functionality might change in future versions.	2171	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2172	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2173	the end of a string designates a module name and quotes it appropriately).
1940		2174
1941	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you	2175	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1942	could start your program like this:	2176	could start your program like this:
1943		2177
1944	PERL_ANYEVENT_MODEL=Perl perl ...	2178	PERL_ANYEVENT_MODEL=Perl perl ...
…		…
1962	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>	2196	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1963	- only support IPv4, never try to resolve or contact IPv6	2197	- only support IPv4, never try to resolve or contact IPv6
1964	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or	2198	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1965	IPv6, but prefer IPv6 over IPv4.	2199	IPv6, but prefer IPv6 over IPv4.
1966		2200
		2201	=item C<PERL_ANYEVENT_HOSTS>
		2202
		2203	This variable, if specified, overrides the F</etc/hosts> file used by
		2204	L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read
		2205	from that file instead.
		2206
1967	=item C<PERL_ANYEVENT_EDNS0>	2207	=item C<PERL_ANYEVENT_EDNS0>
1968		2208
1969	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension	2209	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension for
1970	for DNS. This extension is generally useful to reduce DNS traffic, but	2210	DNS. This extension is generally useful to reduce DNS traffic, especially
1971	some (broken) firewalls drop such DNS packets, which is why it is off by	2211	when DNSSEC is involved, but some (broken) firewalls drop such DNS
1972	default.	2212	packets, which is why it is off by default.
1973		2213
1974	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	2214	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1975	EDNS0 in its DNS requests.	2215	EDNS0 in its DNS requests.
1976		2216
1977	=item C<PERL_ANYEVENT_MAX_FORKS>	2217	=item C<PERL_ANYEVENT_MAX_FORKS>
…		…
1983		2223
1984	The default value for the C<max_outstanding> parameter for the default DNS	2224	The default value for the C<max_outstanding> parameter for the default DNS
1985	resolver - this is the maximum number of parallel DNS requests that are	2225	resolver - this is the maximum number of parallel DNS requests that are
1986	sent to the DNS server.	2226	sent to the DNS server.
1987		2227
		2228	=item C<PERL_ANYEVENT_MAX_SIGNAL_LATENCY>
		2229
		2230	Perl has inherently racy signal handling (you can basically choose between
		2231	losing signals and memory corruption) - pure perl event loops (including
		2232	C<AnyEvent::Loop>, when C<Async::Interrupt> isn't available) therefore
		2233	have to poll regularly to avoid losing signals.
		2234
		2235	Some event loops are racy, but don't poll regularly, and some event loops
		2236	are written in C but are still racy. For those event loops, AnyEvent
		2237	installs a timer that regularly wakes up the event loop.
		2238
		2239	By default, the interval for this timer is C<10> seconds, but you can
		2240	override this delay with this environment variable (or by setting
		2241	the C<$AnyEvent::MAX_SIGNAL_LATENCY> variable before creating signal
		2242	watchers).
		2243
		2244	Lower values increase CPU (and energy) usage, higher values can introduce
		2245	long delays when reaping children or waiting for signals.
		2246
		2247	The L<AnyEvent::Async> module, if available, will be used to avoid this
		2248	polling (with most event loops).
		2249
1988	=item C<PERL_ANYEVENT_RESOLV_CONF>	2250	=item C<PERL_ANYEVENT_RESOLV_CONF>
1989		2251
1990	The file to use instead of F</etc/resolv.conf> (or OS-specific	2252	The absolute path to a F<resolv.conf>-style file to use instead of
1991	configuration) in the default resolver. When set to the empty string, no	2253	F</etc/resolv.conf> (or the OS-specific configuration) in the default
1992	default config will be used.	2254	resolver, or the empty string to select the default configuration.
1993		2255
1994	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.	2256	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.
1995		2257
1996	When neither C<ca_file> nor C<ca_path> was specified during	2258	When neither C<ca_file> nor C<ca_path> was specified during
1997	L<AnyEvent::TLS> context creation, and either of these environment	2259	L<AnyEvent::TLS> context creation, and either of these environment
1998	variables exist, they will be used to specify CA certificate locations	2260	variables are nonempty, they will be used to specify CA certificate
1999	instead of a system-dependent default.	2261	locations instead of a system-dependent default.
2000		2262
2001	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>	2263	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>
2002		2264
2003	When these are set to C<1>, then the respective modules are not	2265	When these are set to C<1>, then the respective modules are not
2004	loaded. Mostly good for testing AnyEvent itself.	2266	loaded. Mostly good for testing AnyEvent itself.
…		…
2336	(even when used without AnyEvent), but most event loops have acceptable	2598	(even when used without AnyEvent), but most event loops have acceptable
2337	performance with or without AnyEvent.	2599	performance with or without AnyEvent.
2338		2600
2339	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2601	=item * The overhead AnyEvent adds is usually much smaller than the overhead of
2340	the actual event loop, only with extremely fast event loops such as EV	2602	the actual event loop, only with extremely fast event loops such as EV
2341	adds AnyEvent significant overhead.	2603	does AnyEvent add significant overhead.
2342		2604
2343	=item * You should avoid POE like the plague if you want performance or	2605	=item * You should avoid POE like the plague if you want performance or
2344	reasonable memory usage.	2606	reasonable memory usage.
2345		2607
2346	=back	2608	=back
…		…
2721		2983
2722	Tutorial/Introduction: L<AnyEvent::Intro>.	2984	Tutorial/Introduction: L<AnyEvent::Intro>.
2723		2985
2724	FAQ: L<AnyEvent::FAQ>.	2986	FAQ: L<AnyEvent::FAQ>.
2725		2987
2726	Utility functions: L<AnyEvent::Util>.	2988	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		2989	(simply logging).
2727		2990
		2991	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
		2992	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		2993
2728	Event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, L<Glib::EV>,	2994	Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>,
2729	L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2995	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		2996	L<Qt>, L<POE>, L<FLTK>.
2730		2997
2731	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2998	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2732	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	2999	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2733	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	3000	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2734	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	3001	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		3002	L<AnyEvent::Impl::FLTK>.
2735		3003
2736	Non-blocking file handles, sockets, TCP clients and	3004	Non-blocking handles, pipes, stream sockets, TCP clients and
2737	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	3005	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2738		3006
2739	Asynchronous DNS: L<AnyEvent::DNS>.	3007	Asynchronous DNS: L<AnyEvent::DNS>.
2740		3008
2741	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.	3009	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 1.354 by root, Thu Aug 11 21:26:39 2011 UTC vs. Revision 1.390 by root, Tue Oct 4 17:45:04 2011 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.354 by root, Thu Aug 11 21:26:39 2011 UTC vs.
Revision 1.390 by root, Tue Oct 4 17:45:04 2011 UTC