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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.179 by root, Thu Sep 4 10:58:58 2008 UTC vs.
Revision 1.198 by root, Thu Mar 26 20:17:44 2009 UTC

…		…
137	These watchers are normal Perl objects with normal Perl lifetime. After	137	These watchers are normal Perl objects with normal Perl lifetime. After
138	creating a watcher it will immediately "watch" for events and invoke the	138	creating a watcher it will immediately "watch" for events and invoke the
139	callback when the event occurs (of course, only when the event model	139	callback when the event occurs (of course, only when the event model
140	is in control).	140	is in control).
141		141
		142	Note that B<callbacks must not permanently change global variables>
		143	potentially in use by the event loop (such as C<$_> or C<$[>) and that B<<
		144	callbacks must not C<die> >>. The former is good programming practise in
		145	Perl and the latter stems from the fact that exception handling differs
		146	widely between event loops.
		147
142	To disable the watcher you have to destroy it (e.g. by setting the	148	To disable the watcher you have to destroy it (e.g. by setting the
143	variable you store it in to C<undef> or otherwise deleting all references	149	variable you store it in to C<undef> or otherwise deleting all references
144	to it).	150	to it).
145		151
146	All watchers are created by calling a method on the C<AnyEvent> class.	152	All watchers are created by calling a method on the C<AnyEvent> class.
…		…
340	=head2 CHILD PROCESS WATCHERS	346	=head2 CHILD PROCESS WATCHERS
341		347
342	You can also watch on a child process exit and catch its exit status.	348	You can also watch on a child process exit and catch its exit status.
343		349
344	The child process is specified by the C<pid> argument (if set to C<0>, it	350	The child process is specified by the C<pid> argument (if set to C<0>, it
345	watches for any child process exit). The watcher will trigger as often	351	watches for any child process exit). The watcher will triggered only when
346	as status change for the child are received. This works by installing a	352	the child process has finished and an exit status is available, not on
347	signal handler for C<SIGCHLD>. The callback will be called with the pid	353	any trace events (stopped/continued).
348	and exit status (as returned by waitpid), so unlike other watcher types,	354
349	you I<can> rely on child watcher callback arguments.	355	The callback will be called with the pid and exit status (as returned by
		356	waitpid), so unlike other watcher types, you I<can> rely on child watcher
		357	callback arguments.
		358
		359	This watcher type works by installing a signal handler for C<SIGCHLD>,
		360	and since it cannot be shared, nothing else should use SIGCHLD or reap
		361	random child processes (waiting for specific child processes, e.g. inside
		362	C<system>, is just fine).
350		363
351	There is a slight catch to child watchers, however: you usually start them	364	There is a slight catch to child watchers, however: you usually start them
352	I<after> the child process was created, and this means the process could	365	I<after> the child process was created, and this means the process could
353	have exited already (and no SIGCHLD will be sent anymore).	366	have exited already (and no SIGCHLD will be sent anymore).
354		367
…		…
818	=item L<AnyEvent::IGS>	831	=item L<AnyEvent::IGS>
819		832
820	A non-blocking interface to the Internet Go Server protocol (used by	833	A non-blocking interface to the Internet Go Server protocol (used by
821	L<App::IGS>).	834	L<App::IGS>).
822		835
823	=item L<Net::IRC3>	836	=item L<AnyEvent::IRC>
824		837
825	AnyEvent based IRC client module family.	838	AnyEvent based IRC client module family (replacing the older Net::IRC3).
826		839
827	=item L<Net::XMPP2>	840	=item L<Net::XMPP2>
828		841
829	AnyEvent based XMPP (Jabber protocol) module family.	842	AnyEvent based XMPP (Jabber protocol) module family.
830		843
…		…
850	=cut	863	=cut
851		864
852	package AnyEvent;	865	package AnyEvent;
853		866
854	no warnings;	867	no warnings;
855	use strict;	868	use strict qw(vars subs);
856		869
857	use Carp;	870	use Carp;
858		871
859	our $VERSION = 4.233;	872	our $VERSION = 4.341;
860	our $MODEL;	873	our $MODEL;
861		874
862	our $AUTOLOAD;	875	our $AUTOLOAD;
863	our @ISA;	876	our @ISA;
864		877
…		…
997	# to support binding more than one watcher per filehandle (they usually	1010	# to support binding more than one watcher per filehandle (they usually
998	# allow only one watcher per fd, so we dup it to get a different one).	1011	# allow only one watcher per fd, so we dup it to get a different one).
999	sub _dupfh($$$$) {	1012	sub _dupfh($$$$) {
1000	my ($poll, $fh, $r, $w) = @_;	1013	my ($poll, $fh, $r, $w) = @_;
1001		1014
1002	require Fcntl;
1003
1004	# cygwin requires the fh mode to be matching, unix doesn't	1015	# cygwin requires the fh mode to be matching, unix doesn't
1005	my ($rw, $mode) = $poll eq "r" ? ($r, "<")	1016	my ($rw, $mode) = $poll eq "r" ? ($r, "<")
1006	: $poll eq "w" ? ($w, ">")	1017	: $poll eq "w" ? ($w, ">")
1007	: Carp::croak "AnyEvent->io requires poll set to either 'r' or 'w'";	1018	: Carp::croak "AnyEvent->io requires poll set to either 'r' or 'w'";
1008		1019
…		…
1021	BEGIN {	1032	BEGIN {
1022	if (eval "use Time::HiRes (); time (); 1") {	1033	if (eval "use Time::HiRes (); time (); 1") {
1023	*_time = \&Time::HiRes::time;	1034	*_time = \&Time::HiRes::time;
1024	# if (eval "use POSIX (); (POSIX::times())...	1035	# if (eval "use POSIX (); (POSIX::times())...
1025	} else {	1036	} else {
1026	*_time = \&CORE::time; # epic fail	1037	*_time = sub { time }; # epic fail
1027	}	1038	}
1028	}	1039	}
1029		1040
1030	sub time { _time }	1041	sub time { _time }
1031	sub now { _time }	1042	sub now { _time }
…		…
1036	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, AnyEvent::CondVar::	1047	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, AnyEvent::CondVar::
1037	}	1048	}
1038		1049
1039	# default implementation for ->signal	1050	# default implementation for ->signal
1040		1051
1041	our %SIG_CB;	1052	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
		1053
		1054	sub _signal_exec {
		1055	sysread $SIGPIPE_R, my $dummy, 4;
		1056
		1057	while (%SIG_EV) {
		1058	for (keys %SIG_EV) {
		1059	delete $SIG_EV{$_};
		1060	$_->() for values %{ $SIG_CB{$_} \|\| {} };
		1061	}
		1062	}
		1063	}
1042		1064
1043	sub signal {	1065	sub signal {
1044	my (undef, %arg) = @_;	1066	my (undef, %arg) = @_;
1045		1067
		1068	unless ($SIGPIPE_R) {
		1069	if (AnyEvent::WIN32) {
		1070	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1071	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
		1072	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
		1073	} else {
		1074	pipe $SIGPIPE_R, $SIGPIPE_W;
		1075	require Fcntl;
		1076	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1077	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1078	}
		1079
		1080	$SIGPIPE_R
		1081	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1082
		1083	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
		1084	}
		1085
1046	my $signal = uc $arg{signal}	1086	my $signal = uc $arg{signal}
1047	or Carp::croak "required option 'signal' is missing";	1087	or Carp::croak "required option 'signal' is missing";
1048		1088
1049	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1089	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1050	$SIG{$signal} \|\|= sub {	1090	$SIG{$signal} \|\|= sub {
1051	$_->() for values %{ $SIG_CB{$signal} \|\| {} };	1091	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
		1092	undef $SIG_EV{$signal};
1052	};	1093	};
1053		1094
1054	bless [$signal, $arg{cb}], "AnyEvent::Base::Signal"	1095	bless [$signal, $arg{cb}], "AnyEvent::Base::Signal"
1055	}	1096	}
1056		1097
…		…
1175		1216
1176	# undocumented/compatibility with pre-3.4	1217	# undocumented/compatibility with pre-3.4
1177	*broadcast = \&send;	1218	*broadcast = \&send;
1178	*wait = \&_wait;	1219	*wait = \&_wait;
1179		1220
		1221	=head1 ERROR AND EXCEPTION HANDLING
		1222
		1223	In general, AnyEvent does not do any error handling - it relies on the
		1224	caller to do that if required. The L<AnyEvent::Strict> module (see also
		1225	the C<PERL_ANYEVENT_STRICT> environment variable, below) provides strict
		1226	checking of all AnyEvent methods, however, which is highly useful during
		1227	development.
		1228
		1229	As for exception handling (i.e. runtime errors and exceptions thrown while
		1230	executing a callback), this is not only highly event-loop specific, but
		1231	also not in any way wrapped by this module, as this is the job of the main
		1232	program.
		1233
		1234	The pure perl event loop simply re-throws the exception (usually
		1235	within C<< condvar->recv >>), the L<Event> and L<EV> modules call C<<
		1236	$Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and
		1237	so on.
		1238
		1239	=head1 ENVIRONMENT VARIABLES
		1240
		1241	The following environment variables are used by this module or its
		1242	submodules:
		1243
		1244	=over 4
		1245
		1246	=item C<PERL_ANYEVENT_VERBOSE>
		1247
		1248	By default, AnyEvent will be completely silent except in fatal
		1249	conditions. You can set this environment variable to make AnyEvent more
		1250	talkative.
		1251
		1252	When set to C<1> or higher, causes AnyEvent to warn about unexpected
		1253	conditions, such as not being able to load the event model specified by
		1254	C<PERL_ANYEVENT_MODEL>.
		1255
		1256	When set to C<2> or higher, cause AnyEvent to report to STDERR which event
		1257	model it chooses.
		1258
		1259	=item C<PERL_ANYEVENT_STRICT>
		1260
		1261	AnyEvent does not do much argument checking by default, as thorough
		1262	argument checking is very costly. Setting this variable to a true value
		1263	will cause AnyEvent to load C<AnyEvent::Strict> and then to thoroughly
		1264	check the arguments passed to most method calls. If it finds any problems
		1265	it will croak.
		1266
		1267	In other words, enables "strict" mode.
		1268
		1269	Unlike C<use strict>, it is definitely recommended ot keep it off in
		1270	production. Keeping C<PERL_ANYEVENT_STRICT=1> in your environment while
		1271	developing programs can be very useful, however.
		1272
		1273	=item C<PERL_ANYEVENT_MODEL>
		1274
		1275	This can be used to specify the event model to be used by AnyEvent, before
		1276	auto detection and -probing kicks in. It must be a string consisting
		1277	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended
		1278	and the resulting module name is loaded and if the load was successful,
		1279	used as event model. If it fails to load AnyEvent will proceed with
		1280	auto detection and -probing.
		1281
		1282	This functionality might change in future versions.
		1283
		1284	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you
		1285	could start your program like this:
		1286
		1287	PERL_ANYEVENT_MODEL=Perl perl ...
		1288
		1289	=item C<PERL_ANYEVENT_PROTOCOLS>
		1290
		1291	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences
		1292	for IPv4 or IPv6. The default is unspecified (and might change, or be the result
		1293	of auto probing).
		1294
		1295	Must be set to a comma-separated list of protocols or address families,
		1296	current supported: C<ipv4> and C<ipv6>. Only protocols mentioned will be
		1297	used, and preference will be given to protocols mentioned earlier in the
		1298	list.
		1299
		1300	This variable can effectively be used for denial-of-service attacks
		1301	against local programs (e.g. when setuid), although the impact is likely
		1302	small, as the program has to handle conenction and other failures anyways.
		1303
		1304	Examples: C<PERL_ANYEVENT_PROTOCOLS=ipv4,ipv6> - prefer IPv4 over IPv6,
		1305	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
		1306	- only support IPv4, never try to resolve or contact IPv6
		1307	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
		1308	IPv6, but prefer IPv6 over IPv4.
		1309
		1310	=item C<PERL_ANYEVENT_EDNS0>
		1311
		1312	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension
		1313	for DNS. This extension is generally useful to reduce DNS traffic, but
		1314	some (broken) firewalls drop such DNS packets, which is why it is off by
		1315	default.
		1316
		1317	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
		1318	EDNS0 in its DNS requests.
		1319
		1320	=item C<PERL_ANYEVENT_MAX_FORKS>
		1321
		1322	The maximum number of child processes that C<AnyEvent::Util::fork_call>
		1323	will create in parallel.
		1324
		1325	=back
		1326
1180	=head1 SUPPLYING YOUR OWN EVENT MODEL INTERFACE	1327	=head1 SUPPLYING YOUR OWN EVENT MODEL INTERFACE
1181		1328
1182	This is an advanced topic that you do not normally need to use AnyEvent in	1329	This is an advanced topic that you do not normally need to use AnyEvent in
1183	a module. This section is only of use to event loop authors who want to	1330	a module. This section is only of use to event loop authors who want to
1184	provide AnyEvent compatibility.	1331	provide AnyEvent compatibility.
…		…
1217		1364
1218	I<rxvt-unicode> also cheats a bit by not providing blocking access to	1365	I<rxvt-unicode> also cheats a bit by not providing blocking access to
1219	condition variables: code blocking while waiting for a condition will	1366	condition variables: code blocking while waiting for a condition will
1220	C<die>. This still works with most modules/usages, and blocking calls must	1367	C<die>. This still works with most modules/usages, and blocking calls must
1221	not be done in an interactive application, so it makes sense.	1368	not be done in an interactive application, so it makes sense.
1222
1223	=head1 ENVIRONMENT VARIABLES
1224
1225	The following environment variables are used by this module:
1226
1227	=over 4
1228
1229	=item C<PERL_ANYEVENT_VERBOSE>
1230
1231	By default, AnyEvent will be completely silent except in fatal
1232	conditions. You can set this environment variable to make AnyEvent more
1233	talkative.
1234
1235	When set to C<1> or higher, causes AnyEvent to warn about unexpected
1236	conditions, such as not being able to load the event model specified by
1237	C<PERL_ANYEVENT_MODEL>.
1238
1239	When set to C<2> or higher, cause AnyEvent to report to STDERR which event
1240	model it chooses.
1241
1242	=item C<PERL_ANYEVENT_STRICT>
1243
1244	AnyEvent does not do much argument checking by default, as thorough
1245	argument checking is very costly. Setting this variable to a true value
1246	will cause AnyEvent to load C<AnyEvent::Strict> and then to thoroughly
1247	check the arguments passed to most method calls. If it finds any problems
1248	it will croak.
1249
1250	In other words, enables "strict" mode.
1251
1252	Unlike C<use strict> it is definitely recommended ot keep it off in
1253	production.
1254
1255	=item C<PERL_ANYEVENT_MODEL>
1256
1257	This can be used to specify the event model to be used by AnyEvent, before
1258	auto detection and -probing kicks in. It must be a string consisting
1259	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended
1260	and the resulting module name is loaded and if the load was successful,
1261	used as event model. If it fails to load AnyEvent will proceed with
1262	auto detection and -probing.
1263
1264	This functionality might change in future versions.
1265
1266	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you
1267	could start your program like this:
1268
1269	PERL_ANYEVENT_MODEL=Perl perl ...
1270
1271	=item C<PERL_ANYEVENT_PROTOCOLS>
1272
1273	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences
1274	for IPv4 or IPv6. The default is unspecified (and might change, or be the result
1275	of auto probing).
1276
1277	Must be set to a comma-separated list of protocols or address families,
1278	current supported: C<ipv4> and C<ipv6>. Only protocols mentioned will be
1279	used, and preference will be given to protocols mentioned earlier in the
1280	list.
1281
1282	This variable can effectively be used for denial-of-service attacks
1283	against local programs (e.g. when setuid), although the impact is likely
1284	small, as the program has to handle connection errors already-
1285
1286	Examples: C<PERL_ANYEVENT_PROTOCOLS=ipv4,ipv6> - prefer IPv4 over IPv6,
1287	but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4>
1288	- only support IPv4, never try to resolve or contact IPv6
1289	addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or
1290	IPv6, but prefer IPv6 over IPv4.
1291
1292	=item C<PERL_ANYEVENT_EDNS0>
1293
1294	Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension
1295	for DNS. This extension is generally useful to reduce DNS traffic, but
1296	some (broken) firewalls drop such DNS packets, which is why it is off by
1297	default.
1298
1299	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1300	EDNS0 in its DNS requests.
1301
1302	=item C<PERL_ANYEVENT_MAX_FORKS>
1303
1304	The maximum number of child processes that C<AnyEvent::Util::fork_call>
1305	will create in parallel.
1306
1307	=back
1308		1369
1309	=head1 EXAMPLE PROGRAM	1370	=head1 EXAMPLE PROGRAM
1310		1371
1311	The following program uses an I/O watcher to read data from STDIN, a timer	1372	The following program uses an I/O watcher to read data from STDIN, a timer
1312	to display a message once per second, and a condition variable to quit the	1373	to display a message once per second, and a condition variable to quit the
…		…
1506	watcher.	1567	watcher.
1507		1568
1508	=head3 Results	1569	=head3 Results
1509		1570
1510	name watchers bytes create invoke destroy comment	1571	name watchers bytes create invoke destroy comment
1511	EV/EV 400000 244 0.56 0.46 0.31 EV native interface	1572	EV/EV 400000 224 0.47 0.35 0.27 EV native interface
1512	EV/Any 100000 244 2.50 0.46 0.29 EV + AnyEvent watchers	1573	EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers
1513	CoroEV/Any 100000 244 2.49 0.44 0.29 coroutines + Coro::Signal	1574	CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal
1514	Perl/Any 100000 513 4.92 0.87 1.12 pure perl implementation	1575	Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation
1515	Event/Event 16000 516 31.88 31.30 0.85 Event native interface	1576	Event/Event 16000 517 32.20 31.80 0.81 Event native interface
1516	Event/Any 16000 590 35.75 31.42 1.08 Event + AnyEvent watchers	1577	Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers
1517	Glib/Any 16000 1357 98.22 12.41 54.00 quadratic behaviour	1578	Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour
1518	Tk/Any 2000 1860 26.97 67.98 14.00 SEGV with >> 2000 watchers	1579	Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers
1519	POE/Event 2000 6644 108.64 736.02 14.73 via POE::Loop::Event	1580	POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event
1520	POE/Select 2000 6343 94.13 809.12 565.96 via POE::Loop::Select	1581	POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select
1521		1582
1522	=head3 Discussion	1583	=head3 Discussion
1523		1584
1524	The benchmark does I<not> measure scalability of the event loop very	1585	The benchmark does I<not> measure scalability of the event loop very
1525	well. For example, a select-based event loop (such as the pure perl one)	1586	well. For example, a select-based event loop (such as the pure perl one)
…		…
1727	watchers, as the management overhead dominates.	1788	watchers, as the management overhead dominates.
1728		1789
1729	=back	1790	=back
1730		1791
1731		1792
		1793	=head1 SIGNALS
		1794
		1795	AnyEvent currently installs handlers for these signals:
		1796
		1797	=over 4
		1798
		1799	=item SIGCHLD
		1800
		1801	A handler for C<SIGCHLD> is installed by AnyEvent's child watcher
		1802	emulation for event loops that do not support them natively. Also, some
		1803	event loops install a similar handler.
		1804
		1805	=item SIGPIPE
		1806
		1807	A no-op handler is installed for C<SIGPIPE> when C<$SIG{PIPE}> is C<undef>
		1808	when AnyEvent gets loaded.
		1809
		1810	The rationale for this is that AnyEvent users usually do not really depend
		1811	on SIGPIPE delivery (which is purely an optimisation for shell use, or
		1812	badly-written programs), but C<SIGPIPE> can cause spurious and rare
		1813	program exits as a lot of people do not expect C<SIGPIPE> when writing to
		1814	some random socket.
		1815
		1816	The rationale for installing a no-op handler as opposed to ignoring it is
		1817	that this way, the handler will be restored to defaults on exec.
		1818
		1819	Feel free to install your own handler, or reset it to defaults.
		1820
		1821	=back
		1822
		1823	=cut
		1824
		1825	$SIG{PIPE} = sub { }
		1826	unless defined $SIG{PIPE};
		1827
		1828
1732	=head1 FORK	1829	=head1 FORK
1733		1830
1734	Most event libraries are not fork-safe. The ones who are usually are	1831	Most event libraries are not fork-safe. The ones who are usually are
1735	because they rely on inefficient but fork-safe C<select> or C<poll>	1832	because they rely on inefficient but fork-safe C<select> or C<poll>
1736	calls. Only L<EV> is fully fork-aware.	1833	calls. Only L<EV> is fully fork-aware.
…		…
1764	=head1 BUGS	1861	=head1 BUGS
1765		1862
1766	Perl 5.8 has numerous memleaks that sometimes hit this module and are hard	1863	Perl 5.8 has numerous memleaks that sometimes hit this module and are hard
1767	to work around. If you suffer from memleaks, first upgrade to Perl 5.10	1864	to work around. If you suffer from memleaks, first upgrade to Perl 5.10
1768	and check wether the leaks still show up. (Perl 5.10.0 has other annoying	1865	and check wether the leaks still show up. (Perl 5.10.0 has other annoying
1769	mamleaks, such as leaking on C<map> and C<grep> but it is usually not as	1866	memleaks, such as leaking on C<map> and C<grep> but it is usually not as
1770	pronounced).	1867	pronounced).
1771		1868
1772		1869
1773	=head1 SEE ALSO	1870	=head1 SEE ALSO
1774		1871

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.179 by root, Thu Sep 4 10:58:58 2008 UTC vs. Revision 1.198 by root, Thu Mar 26 20:17:44 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.179 by root, Thu Sep 4 10:58:58 2008 UTC vs.
Revision 1.198 by root, Thu Mar 26 20:17:44 2009 UTC