[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 1.388 by root, Sun Oct 2 01:22:01 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 = '6.02';
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($$;@) {
		1305	# only load the big bloated module when we actually are about to log something
		1306	if ($_[0] <= ($VERBOSE \|\| 1)) { # also catches non-numeric levels(!) and fatal
		1307	local ($!, $@);
		1308	require AnyEvent::Log; # among other things, sets $VERBOSE to 9
		1309	# AnyEvent::Log overwrites this function
		1310	goto &log;
		1311	}
		1312
		1313	0 # not logged
		1314	}
		1315
		1316	sub logger($;$) {
		1317	package AnyEvent::Log;
		1318
		1319	my ($level, $renabled) = @_;
		1320
		1321	$$renabled = $level <= $VERBOSE;
		1322
		1323	my $pkg = (caller)[0];
		1324
		1325	my $logger = [$pkg, $level, $renabled];
		1326
		1327	our %LOGGER;
		1328	$LOGGER{$logger+0} = $logger;
		1329
		1330	return unless defined wantarray;
		1331
		1332	require AnyEvent::Util;
		1333	my $guard = AnyEvent::Util::guard (sub {
		1334	# "clean up"
		1335	delete $LOGGER{$logger+0};
		1336	});
		1337
		1338	sub {
		1339	return 0 unless $$renabled;
		1340
		1341	$guard if 0; # keep guard alive, but don't cause runtime overhead
		1342	require AnyEvent::Log unless $AnyEvent::Log::VERSION;
		1343	package AnyEvent::Log;
		1344	_log ($logger->[0], $level, @_) # logger->[0] has been converted at load time
		1345	}
		1346	}
		1347
		1348	if (length $ENV{PERL_ANYEVENT_LOG}) {
		1349	require AnyEvent::Log; # AnyEvent::Log does the thing for us
		1350	}
		1351
1240	my @models = (	1352	our @models = (
1241	[EV:: => AnyEvent::Impl::EV:: , 1],	1353	[EV:: => AnyEvent::Impl::EV::],
1242	[AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],	1354	[AnyEvent::Loop:: => AnyEvent::Impl::Perl::],
1243	# everything below here will not (normally) be autoprobed	1355	# everything below here will not (normally) be autoprobed
1244	# as the pure perl backend should work everywhere	1356	# as the pure perl backend should work everywhere
1245	# and is usually faster	1357	# and is usually faster
		1358	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package, so msut be near the top
1246	[Event:: => AnyEvent::Impl::Event::, 1],	1359	[Event:: => AnyEvent::Impl::Event::], # slow, stable
1247	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1360	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers
		1361	# everything below here should not be autoloaded
1248	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1362	[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	1363	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1251	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1364	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1252	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1365	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1253	[Wx:: => AnyEvent::Impl::POE::],	1366	[Wx:: => AnyEvent::Impl::POE::],
1254	[Prima:: => AnyEvent::Impl::POE::],	1367	[Prima:: => AnyEvent::Impl::POE::],
1255	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::],	1368	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1256	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],	1369	[Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1257	[FLTK:: => AnyEvent::Impl::FLTK::],	1370	[FLTK:: => AnyEvent::Impl::FLTK::],
1258	);	1371	);
1259		1372
1260	our %method = map +($_ => 1),	1373	our @isa_hook;
		1374
		1375	sub _isa_set {
		1376	my @pkg = ("AnyEvent", (map $_->[0], grep defined, @isa_hook), $MODEL);
		1377
		1378	@{"$pkg[$_-1]::ISA"} = $pkg[$_]
		1379	for 1 .. $#pkg;
		1380
		1381	grep $_ && $_->[1], @isa_hook
		1382	and AE::_reset ();
		1383	}
		1384
		1385	# used for hooking AnyEvent::Strict and AnyEvent::Debug::Wrap into the class hierarchy
		1386	sub _isa_hook($$;$) {
		1387	my ($i, $pkg, $reset_ae) = @_;
		1388
		1389	$isa_hook[$i] = $pkg ? [$pkg, $reset_ae] : undef;
		1390
		1391	_isa_set;
		1392	}
		1393
		1394	# all autoloaded methods reserve the complete glob, not just the method slot.
		1395	# due to bugs in perls method cache implementation.
1261	qw(io timer time now now_update signal child idle condvar DESTROY);	1396	our @methods = qw(io timer time now now_update signal child idle condvar);
1262
1263	our @post_detect;
1264
1265	sub post_detect(&) {
1266	my ($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		1397
1279	sub detect() {	1398	sub detect() {
		1399	return $MODEL if $MODEL; # some programs keep references to detect
		1400
		1401	# IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it
		1402	# the author knows about the problems and what it does to AnyEvent as a whole
		1403	# (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent
		1404	# anyway.
		1405	AnyEvent::log fatal => "AnyEvent: IO::Async::Loop::AnyEvent detected - this module is broken by design,\n"
		1406	. "abuses internals and breaks AnyEvent, will not continue."
		1407	if exists $INC{"IO/Async/Loop/AnyEvent.pm"};
		1408
		1409	local $!; # for good measure
		1410	local $SIG{__DIE__}; # we use eval
		1411
1280	# free some memory	1412	# free some memory
1281	*detect = sub () { $MODEL };	1413	*detect = sub () { $MODEL };
		1414	# undef &func doesn't correctly update the method cache. grmbl.
		1415	# so we delete the whole glob. grmbl.
		1416	# otoh, perl doesn't let me undef an active usb, but it lets me free
		1417	# a glob with an active sub. hrm. i hope it works, but perl is
		1418	# usually buggy in this department. sigh.
		1419	delete @{"AnyEvent::"}{@methods};
		1420	undef @methods;
1282		1421
1283	local $!; # for good measure
1284	local $SIG{__DIE__};
1285
1286	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1422	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1287	my $model = "AnyEvent::Impl::$1";	1423	my $model = $1;
		1424	$model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1288	if (eval "require $model") {	1425	if (eval "require $model") {
		1426	AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1289	$MODEL = $model;	1427	$MODEL = $model;
1290	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1291	} else {	1428	} else {
1292	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1429	AnyEvent::log 4 => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1293	}	1430	}
1294	}	1431	}
1295		1432
1296	# check for already loaded models	1433	# check for already loaded models
1297	unless ($MODEL) {	1434	unless ($MODEL) {
1298	for (@REGISTRY, @models) {	1435	for (@REGISTRY, @models) {
1299	my ($package, $model) = @$_;	1436	my ($package, $model) = @$_;
1300	if (${"$package\::VERSION"} > 0) {	1437	if (${"$package\::VERSION"} > 0) {
1301	if (eval "require $model") {	1438	if (eval "require $model") {
		1439	AnyEvent::log 7 => "autodetected model '$model', using it.";
1302	$MODEL = $model;	1440	$MODEL = $model;
1303	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;
1304	last;	1441	last;
1305	}	1442	}
1306	}	1443	}
1307	}	1444	}
1308		1445
1309	unless ($MODEL) {	1446	unless ($MODEL) {
1310	# try to autoload a model	1447	# try to autoload a model
1311	for (@REGISTRY, @models) {	1448	for (@REGISTRY, @models) {
1312	my ($package, $model, $autoload) = @$_;	1449	my ($package, $model) = @$_;
1313	if (	1450	if (
1314	$autoload
1315	and eval "require $package"	1451	eval "require $package"
1316	and ${"$package\::VERSION"} > 0	1452	and ${"$package\::VERSION"} > 0
1317	and eval "require $model"	1453	and eval "require $model"
1318	) {	1454	) {
		1455	AnyEvent::log 7 => "autoloaded model '$model', using it.";
1319	$MODEL = $model;	1456	$MODEL = $model;
1320	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1321	last;	1457	last;
1322	}	1458	}
1323	}	1459	}
1324		1460
1325	$MODEL	1461	$MODEL
1326	or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";	1462	or AnyEvent::log fatal => "AnyEvent: backend autodetection failed - did you properly install AnyEvent?";
1327	}	1463	}
1328	}	1464	}
1329		1465
1330	@models = (); # free probe data	1466	# free memory only needed for probing
		1467	undef @models;
		1468	undef @REGISTRY;
1331		1469
1332	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	1470	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1333	unshift @ISA, $MODEL;
1334		1471
1335	# now nuke some methods that are overridden by the backend.	1472	# now nuke some methods that are overridden by the backend.
1336	# SUPER is not allowed.	1473	# SUPER usage is not allowed in these.
1337	for (qw(time signal child idle)) {	1474	for (qw(time signal child idle)) {
1338	undef &{"AnyEvent::Base::$_"}	1475	undef &{"AnyEvent::Base::$_"}
1339	if defined &{"$MODEL\::$_"};	1476	if defined &{"$MODEL\::$_"};
1340	}	1477	}
1341		1478
		1479	_isa_set;
		1480
		1481	# we're officially open!
		1482
1342	if ($ENV{PERL_ANYEVENT_STRICT}) {	1483	if ($ENV{PERL_ANYEVENT_STRICT}) {
1343	eval { require AnyEvent::Strict };	1484	require AnyEvent::Strict;
1344	warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1345	if $@ && $VERBOSE;
1346	}	1485	}
1347		1486
		1487	if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
		1488	require AnyEvent::Debug;
		1489	AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
		1490	}
		1491
		1492	if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
		1493	require AnyEvent::Socket;
		1494	require AnyEvent::Debug;
		1495
		1496	my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL};
		1497	$shell =~ s/\$\$/$$/g;
		1498
		1499	my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell);
		1500	$AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service);
		1501	}
		1502
		1503	# now the anyevent environment is set up as the user told us to, so
		1504	# call the actual user code - post detects
		1505
1348	(shift @post_detect)->() while @post_detect;	1506	(shift @post_detect)->() while @post_detect;
		1507	undef @post_detect;
1349		1508
1350	*post_detect = sub(&) {	1509	*post_detect = sub(&) {
1351	shift->();	1510	shift->();
1352		1511
1353	undef	1512	undef
1354	};	1513	};
1355		1514
1356	$MODEL	1515	$MODEL
1357	}	1516	}
1358		1517
1359	sub AUTOLOAD {	1518	for my $name (@methods) {
1360	(my $func = $AUTOLOAD) =~ s/.*://;	1519	*$name = sub {
1361
1362	$method{$func}
1363	or Carp::croak "$func: not a valid AnyEvent class method";
1364
1365	detect;	1520	detect;
1366		1521	# we use goto because
1367	my $class = shift;	1522	# a) it makes the thunk more transparent
1368	$class->$func (@_);	1523	# b) it allows us to delete the thunk later
1369	}	1524	goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
1370		1525	};
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	}	1526	}
1387		1527
1388	# utility function to dup a filehandle. this is used by many backends	1528	# utility function to dup a filehandle. this is used by many backends
1389	# to support binding more than one watcher per filehandle (they usually	1529	# 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).	1530	# allow only one watcher per fd, so we dup it to get a different one).
…		…
1414		1554
1415	package AE;	1555	package AE;
1416		1556
1417	our $VERSION = $AnyEvent::VERSION;	1557	our $VERSION = $AnyEvent::VERSION;
1418		1558
		1559	sub _reset() {
		1560	eval q{
1419	# fall back to the main API by default - backends and AnyEvent::Base	1561	# fall back to the main API by default - backends and AnyEvent::Base
1420	# implementations can overwrite these.	1562	# implementations can overwrite these.
1421		1563
1422	sub io($$$) {	1564	sub io($$$) {
1423	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1565	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1424	}	1566	}
1425		1567
1426	sub timer($$$) {	1568	sub timer($$$) {
1427	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])	1569	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1428	}	1570	}
1429		1571
1430	sub signal($$) {	1572	sub signal($$) {
1431	AnyEvent->signal (signal => $_[0], cb => $_[1])	1573	AnyEvent->signal (signal => $_[0], cb => $_[1])
1432	}	1574	}
1433		1575
1434	sub child($$) {	1576	sub child($$) {
1435	AnyEvent->child (pid => $_[0], cb => $_[1])	1577	AnyEvent->child (pid => $_[0], cb => $_[1])
1436	}	1578	}
1437		1579
1438	sub idle($) {	1580	sub idle($) {
1439	AnyEvent->idle (cb => $_[0])	1581	AnyEvent->idle (cb => $_[0]);
1440	}	1582	}
1441		1583
1442	sub cv(;&) {	1584	sub cv(;&) {
1443	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())	1585	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1444	}	1586	}
1445		1587
1446	sub now() {	1588	sub now() {
1447	AnyEvent->now	1589	AnyEvent->now
1448	}	1590	}
1449		1591
1450	sub now_update() {	1592	sub now_update() {
1451	AnyEvent->now_update	1593	AnyEvent->now_update
1452	}	1594	}
1453		1595
1454	sub time() {	1596	sub time() {
1455	AnyEvent->time	1597	AnyEvent->time
1456	}	1598	}
1457		1599
1458	*postpone = \&AnyEvent::postpone;	1600	*postpone = \&AnyEvent::postpone;
		1601	*log = \&AnyEvent::log;
		1602	};
		1603	die if $@;
		1604	}
		1605
		1606	BEGIN { _reset }
1459		1607
1460	package AnyEvent::Base;	1608	package AnyEvent::Base;
1461		1609
1462	# default implementations for many methods	1610	# default implementations for many methods
1463		1611
1464	sub time {	1612	sub time {
1465	eval q{ # poor man's autoloading {}	1613	eval q{ # poor man's autoloading {}
1466	# probe for availability of Time::HiRes	1614	# probe for availability of Time::HiRes
1467	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1615	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1468	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1616	*time = sub { Time::HiRes::time () };
1469	*AE::time = \&Time::HiRes::time;	1617	*AE::time = \& Time::HiRes::time ;
		1618	*now = \&time;
		1619	AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy.";
1470	# if (eval "use POSIX (); (POSIX::times())...	1620	# if (eval "use POSIX (); (POSIX::times())...
1471	} else {	1621	} else {
		1622	*time = sub { CORE::time };
		1623	*AE::time = sub (){ CORE::time };
		1624	*now = \&time;
1472	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1625	AnyEvent::log 3 => "using built-in time(), WARNING, no sub-second resolution!";
1473	*AE::time = sub (){ time }; # epic fail
1474	}	1626	}
1475
1476	*time = sub { AE::time }; # different prototypes
1477	};	1627	};
1478	die if $@;	1628	die if $@;
1479		1629
1480	&time	1630	&time
1481	}	1631	}
1482		1632
1483	*now = \&time;	1633	*now = \&time;
1484
1485	sub now_update { }	1634	sub now_update { }
1486		1635
1487	sub _poll {	1636	sub _poll {
1488	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";	1637	Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
1489	}	1638	}
…		…
1575		1724
1576	sub signal {	1725	sub signal {
1577	eval q{ # poor man's autoloading {}	1726	eval q{ # poor man's autoloading {}
1578	# probe for availability of Async::Interrupt	1727	# probe for availability of Async::Interrupt
1579	if (_have_async_interrupt) {	1728	if (_have_async_interrupt) {
1580	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1729	AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling.";
1581		1730
1582	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1731	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1583	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1732	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1584		1733
1585	} else {	1734	} else {
1586	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1735	AnyEvent::log 8 => "using emulated perl signal handling with latency timer.";
1587		1736
1588	if (AnyEvent::WIN32) {	1737	if (AnyEvent::WIN32) {
1589	require AnyEvent::Util;	1738	require AnyEvent::Util;
1590		1739
1591	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1740	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
…		…
1667	: sysread $SIGPIPE_R, (my $dummy), 9;	1816	: sysread $SIGPIPE_R, (my $dummy), 9;
1668		1817
1669	while (%SIG_EV) {	1818	while (%SIG_EV) {
1670	for (keys %SIG_EV) {	1819	for (keys %SIG_EV) {
1671	delete $SIG_EV{$_};	1820	delete $SIG_EV{$_};
1672	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1821	&$_ for values %{ $SIG_CB{$_} \|\| {} };
1673	}	1822	}
1674	}	1823	}
1675	};	1824	};
1676	};	1825	};
1677	die if $@;	1826	die if $@;
…		…
1744		1893
1745	my ($cb, $w, $rcb) = $arg{cb};	1894	my ($cb, $w, $rcb) = $arg{cb};
1746		1895
1747	$rcb = sub {	1896	$rcb = sub {
1748	if ($cb) {	1897	if ($cb) {
1749	$w = _time;	1898	$w = AE::time;
1750	&$cb;	1899	&$cb;
1751	$w = _time - $w;	1900	$w = AE::time - $w;
1752		1901
1753	# never use more then 50% of the time for the idle watcher,	1902	# never use more then 50% of the time for the idle watcher,
1754	# within some limits	1903	# within some limits
1755	$w = 0.0001 if $w < 0.0001;	1904	$w = 0.0001 if $w < 0.0001;
1756	$w = 5 if $w > 5;	1905	$w = 5 if $w > 5;
…		…
1885	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and	2034	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
1886	so on.	2035	so on.
1887		2036
1888	=head1 ENVIRONMENT VARIABLES	2037	=head1 ENVIRONMENT VARIABLES
1889		2038
1890	The following environment variables are used by this module or its	2039	AnyEvent supports a number of environment variables that tune the
1891	submodules.	2040	runtime behaviour. They are usually evaluated when AnyEvent is
		2041	loaded, initialised, or a submodule that uses them is loaded. Many of
		2042	them also cause AnyEvent to load additional modules - for example,
		2043	C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be
		2044	loaded.
1892		2045
1893	Note that AnyEvent will remove I<all> environment variables starting with	2046	All the environment variables documented here start with
1894	C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is	2047	C<PERL_ANYEVENT_>, which is what AnyEvent considers its own
1895	enabled.	2048	namespace. Other modules are encouraged (but by no means required) to use
		2049	C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule
		2050	namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could
		2051	be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env
		2052	variables starting with C<AE_>, see below).
		2053
		2054	All variables can also be set via the C<AE_> prefix, that is, instead
		2055	of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In
		2056	case there is a clash btween anyevent and another program that uses
		2057	C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something>
		2058	variable to the empty string, as those variables take precedence.
		2059
		2060	When AnyEvent is first loaded, it copies all C<AE_xxx> env variables
		2061	to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already
		2062	exists. If taint mode is on, then AnyEvent will remove I<all> environment
		2063	variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them
		2064	with C<undef> or the empty string, if the corresaponding C<AE_> variable
		2065	is set).
		2066
		2067	The exact algorithm is currently:
		2068
		2069	1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV
		2070	2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists
		2071	3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef.
		2072
		2073	This ensures that child processes will not see the C<AE_> variables.
		2074
		2075	The following environment variables are currently known to AnyEvent:
1896		2076
1897	=over 4	2077	=over 4
1898		2078
1899	=item C<PERL_ANYEVENT_VERBOSE>	2079	=item C<PERL_ANYEVENT_VERBOSE>
1900		2080
1901	By default, AnyEvent will be completely silent except in fatal	2081	By default, AnyEvent will only log messages with loglevel C<3>
1902	conditions. You can set this environment variable to make AnyEvent more	2082	(C<critical>) or higher (see L<AnyEvent::Log>). You can set this
		2083	environment variable to a numerical loglevel to make AnyEvent more (or
1903	talkative.	2084	less) talkative.
1904		2085
		2086	If you want to do more than just set the global logging level
		2087	you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
		2088	complex specifications.
		2089
		2090	When set to C<0> (C<off>), then no messages whatsoever will be logged with
		2091	the default logging settings.
		2092
1905	When set to C<1> or higher, causes AnyEvent to warn about unexpected	2093	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	2094	unexpected conditions, such as not being able to load the event model
1907	C<PERL_ANYEVENT_MODEL>.	2095	specified by C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an
		2096	exception - this is the minimum recommended level.
1908		2097
1909	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	2098	When set to C<7> or higher (info), cause AnyEvent to report which event model it
1910	model it chooses.	2099	chooses.
1911		2100
1912	When set to C<8> or higher, then AnyEvent will report extra information on	2101	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.	2102	which optional modules it loads and how it implements certain features.
		2103
		2104	=item C<PERL_ANYEVENT_LOG>
		2105
		2106	Accepts rather complex logging specifications. For example, you could log
		2107	all C<debug> messages of some module to stderr, warnings and above to
		2108	stderr, and errors and above to syslog, with:
		2109
		2110	PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog
		2111
		2112	For the rather extensive details, see L<AnyEvent::Log>.
		2113
		2114	This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
		2115	so will take effect even before AnyEvent has initialised itself.
		2116
		2117	Note that specifying this environment variable causes the L<AnyEvent::Log>
		2118	module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
		2119	using the latter saves a few hundred kB of memory until the first message
		2120	is being logged.
1914		2121
1915	=item C<PERL_ANYEVENT_STRICT>	2122	=item C<PERL_ANYEVENT_STRICT>
1916		2123
1917	AnyEvent does not do much argument checking by default, as thorough	2124	AnyEvent does not do much argument checking by default, as thorough
1918	argument checking is very costly. Setting this variable to a true value	2125	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>	2132	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	2133	>>, it is definitely recommended to keep it off in production. Keeping
1927	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs	2134	C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs
1928	can be very useful, however.	2135	can be very useful, however.
1929		2136
		2137	=item C<PERL_ANYEVENT_DEBUG_SHELL>
		2138
		2139	If this env variable is nonempty, then its contents will be interpreted by
		2140	C<AnyEvent::Socket::parse_hostport> and C<AnyEvent::Debug::shell> (after
		2141	replacing every occurance of C<$$> by the process pid). The shell object
		2142	is saved in C<$AnyEvent::Debug::SHELL>.
		2143
		2144	This happens when the first watcher is created.
		2145
		2146	For example, to bind a debug shell on a unix domain socket in
		2147	F<< /tmp/debug<pid>.sock >>, you could use this:
		2148
		2149	PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog
		2150	# connect with e.g.: socat readline /tmp/debug123.sock
		2151
		2152	Or to bind to tcp port 4545 on localhost:
		2153
		2154	PERL_ANYEVENT_DEBUG_SHELL=127.0.0.1:4545 perlprog
		2155	# connect with e.g.: telnet localhost 4545
		2156
		2157	Note that creating sockets in F</tmp> or on localhost is very unsafe on
		2158	multiuser systems.
		2159
		2160	=item C<PERL_ANYEVENT_DEBUG_WRAP>
		2161
		2162	Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for
		2163	debugging purposes. See C<AnyEvent::Debug::wrap> for details.
		2164
1930	=item C<PERL_ANYEVENT_MODEL>	2165	=item C<PERL_ANYEVENT_MODEL>
1931		2166
1932	This can be used to specify the event model to be used by AnyEvent, before	2167	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	2168	auto detection and -probing kicks in.
1934	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	2169
		2170	It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
		2171	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,	2172	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	2173	event model backend. If it fails to load then AnyEvent will proceed with
1937	auto detection and -probing.	2174	auto detection and -probing.
1938		2175
1939	This functionality might change in future versions.	2176	If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
		2177	nothing gets prepended and the module name is used as-is (hint: C<::> at
		2178	the end of a string designates a module name and quotes it appropriately).
1940		2179
1941	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you	2180	For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1942	could start your program like this:	2181	could start your program like this:
1943		2182
1944	PERL_ANYEVENT_MODEL=Perl perl ...	2183	PERL_ANYEVENT_MODEL=Perl perl ...
…		…
1962	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>	2201	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1963	- only support IPv4, never try to resolve or contact IPv6	2202	- only support IPv4, never try to resolve or contact IPv6
1964	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or	2203	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1965	IPv6, but prefer IPv6 over IPv4.	2204	IPv6, but prefer IPv6 over IPv4.
1966		2205
		2206	=item C<PERL_ANYEVENT_HOSTS>
		2207
		2208	This variable, if specified, overrides the F</etc/hosts> file used by
		2209	L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read
		2210	from that file instead.
		2211
1967	=item C<PERL_ANYEVENT_EDNS0>	2212	=item C<PERL_ANYEVENT_EDNS0>
1968		2213
1969	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension	2214	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	2215	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	2216	when DNSSEC is involved, but some (broken) firewalls drop such DNS
1972	default.	2217	packets, which is why it is off by default.
1973		2218
1974	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	2219	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1975	EDNS0 in its DNS requests.	2220	EDNS0 in its DNS requests.
1976		2221
1977	=item C<PERL_ANYEVENT_MAX_FORKS>	2222	=item C<PERL_ANYEVENT_MAX_FORKS>
…		…
1983		2228
1984	The default value for the C<max_outstanding> parameter for the default DNS	2229	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	2230	resolver - this is the maximum number of parallel DNS requests that are
1986	sent to the DNS server.	2231	sent to the DNS server.
1987		2232
		2233	=item C<PERL_ANYEVENT_MAX_SIGNAL_LATENCY>
		2234
		2235	Perl has inherently racy signal handling (you can basically choose between
		2236	losing signals and memory corruption) - pure perl event loops (including
		2237	C<AnyEvent::Loop>, when C<Async::Interrupt> isn't available) therefore
		2238	have to poll regularly to avoid losing signals.
		2239
		2240	Some event loops are racy, but don't poll regularly, and some event loops
		2241	are written in C but are still racy. For those event loops, AnyEvent
		2242	installs a timer that regularly wakes up the event loop.
		2243
		2244	By default, the interval for this timer is C<10> seconds, but you can
		2245	override this delay with this environment variable (or by setting
		2246	the C<$AnyEvent::MAX_SIGNAL_LATENCY> variable before creating signal
		2247	watchers).
		2248
		2249	Lower values increase CPU (and energy) usage, higher values can introduce
		2250	long delays when reaping children or waiting for signals.
		2251
		2252	The L<AnyEvent::Async> module, if available, will be used to avoid this
		2253	polling (with most event loops).
		2254
1988	=item C<PERL_ANYEVENT_RESOLV_CONF>	2255	=item C<PERL_ANYEVENT_RESOLV_CONF>
1989		2256
1990	The file to use instead of F</etc/resolv.conf> (or OS-specific	2257	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	2258	F</etc/resolv.conf> (or the OS-specific configuration) in the default
1992	default config will be used.	2259	resolver, or the empty string to select the default configuration.
1993		2260
1994	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.	2261	=item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>.
1995		2262
1996	When neither C<ca_file> nor C<ca_path> was specified during	2263	When neither C<ca_file> nor C<ca_path> was specified during
1997	L<AnyEvent::TLS> context creation, and either of these environment	2264	L<AnyEvent::TLS> context creation, and either of these environment
1998	variables exist, they will be used to specify CA certificate locations	2265	variables are nonempty, they will be used to specify CA certificate
1999	instead of a system-dependent default.	2266	locations instead of a system-dependent default.
2000		2267
2001	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>	2268	=item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT>
2002		2269
2003	When these are set to C<1>, then the respective modules are not	2270	When these are set to C<1>, then the respective modules are not
2004	loaded. Mostly good for testing AnyEvent itself.	2271	loaded. Mostly good for testing AnyEvent itself.
…		…
2336	(even when used without AnyEvent), but most event loops have acceptable	2603	(even when used without AnyEvent), but most event loops have acceptable
2337	performance with or without AnyEvent.	2604	performance with or without AnyEvent.
2338		2605
2339	=item * The overhead AnyEvent adds is usually much smaller than the overhead of	2606	=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	2607	the actual event loop, only with extremely fast event loops such as EV
2341	adds AnyEvent significant overhead.	2608	does AnyEvent add significant overhead.
2342		2609
2343	=item * You should avoid POE like the plague if you want performance or	2610	=item * You should avoid POE like the plague if you want performance or
2344	reasonable memory usage.	2611	reasonable memory usage.
2345		2612
2346	=back	2613	=back
…		…
2721		2988
2722	Tutorial/Introduction: L<AnyEvent::Intro>.	2989	Tutorial/Introduction: L<AnyEvent::Intro>.
2723		2990
2724	FAQ: L<AnyEvent::FAQ>.	2991	FAQ: L<AnyEvent::FAQ>.
2725		2992
2726	Utility functions: L<AnyEvent::Util>.	2993	Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log>
		2994	(simply logging).
2727		2995
		2996	Development/Debugging: L<AnyEvent::Strict> (stricter checking),
		2997	L<AnyEvent::Debug> (interactive shell, watcher tracing).
		2998
2728	Event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, L<Glib::EV>,	2999	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>.	3000	L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>,
		3001	L<Qt>, L<POE>, L<FLTK>.
2730		3002
2731	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	3003	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2732	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	3004	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2733	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	3005	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2734	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.	3006	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>,
		3007	L<AnyEvent::Impl::FLTK>.
2735		3008
2736	Non-blocking file handles, sockets, TCP clients and	3009	Non-blocking handles, pipes, stream sockets, TCP clients and
2737	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	3010	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2738		3011
2739	Asynchronous DNS: L<AnyEvent::DNS>.	3012	Asynchronous DNS: L<AnyEvent::DNS>.
2740		3013
2741	Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.	3014	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 1.388 by root, Sun Oct 2 01:22:01 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 1.388 by root, Sun Oct 2 01:22:01 2011 UTC