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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.263 by root, Wed Jul 29 12:39:21 2009 UTC vs.
Revision 1.295 by root, Wed Oct 28 02:42:06 2009 UTC

…		…
181	my variables are only visible after the statement in which they are	181	my variables are only visible after the statement in which they are
182	declared.	182	declared.
183		183
184	=head2 I/O WATCHERS	184	=head2 I/O WATCHERS
185		185
		186	$w = AnyEvent->io (
		187	fh => <filehandle_or_fileno>,
		188	poll => <"r" or "w">,
		189	cb => <callback>,
		190	);
		191
186	You can create an I/O watcher by calling the C<< AnyEvent->io >> method	192	You can create an I/O watcher by calling the C<< AnyEvent->io >> method
187	with the following mandatory key-value pairs as arguments:	193	with the following mandatory key-value pairs as arguments:
188		194
189	C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch	195	C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch
190	for events (AnyEvent might or might not keep a reference to this file	196	for events (AnyEvent might or might not keep a reference to this file
…		…
219	undef $w;	225	undef $w;
220	});	226	});
221		227
222	=head2 TIME WATCHERS	228	=head2 TIME WATCHERS
223		229
		230	$w = AnyEvent->timer (after => <seconds>, cb => <callback>);
		231
		232	$w = AnyEvent->timer (
		233	after => <fractional_seconds>,
		234	interval => <fractional_seconds>,
		235	cb => <callback>,
		236	);
		237
224	You can create a time watcher by calling the C<< AnyEvent->timer >>	238	You can create a time watcher by calling the C<< AnyEvent->timer >>
225	method with the following mandatory arguments:	239	method with the following mandatory arguments:
226		240
227	C<after> specifies after how many seconds (fractional values are	241	C<after> specifies after how many seconds (fractional values are
228	supported) the callback should be invoked. C<cb> is the callback to invoke	242	supported) the callback should be invoked. C<cb> is the callback to invoke
…		…
355		369
356	=back	370	=back
357		371
358	=head2 SIGNAL WATCHERS	372	=head2 SIGNAL WATCHERS
359		373
		374	$w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>);
		375
360	You can watch for signals using a signal watcher, C<signal> is the signal	376	You can watch for signals using a signal watcher, C<signal> is the signal
361	I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl	377	I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl
362	callback to be invoked whenever a signal occurs.	378	callback to be invoked whenever a signal occurs.
363		379
364	Although the callback might get passed parameters, their value and	380	Although the callback might get passed parameters, their value and
…		…
383	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });	399	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
384		400
385	=head3 Signal Races, Delays and Workarounds	401	=head3 Signal Races, Delays and Workarounds
386		402
387	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching	403	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching
388	callbacks to signals in a generic way, which is a pity, as you cannot do	404	callbacks to signals in a generic way, which is a pity, as you cannot
389	race-free signal handling in perl. AnyEvent will try to do it's best, but	405	do race-free signal handling in perl, requiring C libraries for
		406	this. AnyEvent will try to do it's best, which means in some cases,
390	in some cases, signals will be delayed. The maximum time a signal might	407	signals will be delayed. The maximum time a signal might be delayed is
391	be delayed is specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10	408	specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This
392	seconds). This variable can be changed only before the first signal	409	variable can be changed only before the first signal watcher is created,
393	watcher is created, and should be left alone otherwise. Higher values	410	and should be left alone otherwise. This variable determines how often
		411	AnyEvent polls for signals (in case a wake-up was missed). Higher values
394	will cause fewer spurious wake-ups, which is better for power and CPU	412	will cause fewer spurious wake-ups, which is better for power and CPU
		413	saving.
		414
395	saving. All these problems can be avoided by installing the optional	415	All these problems can be avoided by installing the optional
396	L<Async::Interrupt> module. This will not work with inherently broken	416	L<Async::Interrupt> module, which works with most event loops. It will not
397	event loops such as L<Event> or L<Event::Lib> (and not with L<POE>	417	work with inherently broken event loops such as L<Event> or L<Event::Lib>
398	currently, as POE does it's own workaround with one-second latency). With	418	(and not with L<POE> currently, as POE does it's own workaround with
399	those, you just have to suffer the delays.	419	one-second latency). For those, you just have to suffer the delays.
400		420
401	=head2 CHILD PROCESS WATCHERS	421	=head2 CHILD PROCESS WATCHERS
		422
		423	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
402		424
403	You can also watch on a child process exit and catch its exit status.	425	You can also watch on a child process exit and catch its exit status.
404		426
405	The child process is specified by the C<pid> argument (one some backends,	427	The child process is specified by the C<pid> argument (one some backends,
406	using C<0> watches for any child process exit, on others this will	428	using C<0> watches for any child process exit, on others this will
…		…
455	# do something else, then wait for process exit	477	# do something else, then wait for process exit
456	$done->recv;	478	$done->recv;
457		479
458	=head2 IDLE WATCHERS	480	=head2 IDLE WATCHERS
459		481
		482	$w = AnyEvent->idle (cb => <callback>);
		483
460	Sometimes there is a need to do something, but it is not so important	484	Sometimes there is a need to do something, but it is not so important
461	to do it instantly, but only when there is nothing better to do. This	485	to do it instantly, but only when there is nothing better to do. This
462	"nothing better to do" is usually defined to be "no other events need	486	"nothing better to do" is usually defined to be "no other events need
463	attention by the event loop".	487	attention by the event loop".
464		488
…		…
490	});	514	});
491	});	515	});
492		516
493	=head2 CONDITION VARIABLES	517	=head2 CONDITION VARIABLES
494		518
		519	$cv = AnyEvent->condvar;
		520
		521	$cv->send (<list>);
		522	my @res = $cv->recv;
		523
495	If you are familiar with some event loops you will know that all of them	524	If you are familiar with some event loops you will know that all of them
496	require you to run some blocking "loop", "run" or similar function that	525	require you to run some blocking "loop", "run" or similar function that
497	will actively watch for new events and call your callbacks.	526	will actively watch for new events and call your callbacks.
498		527
499	AnyEvent is slightly different: it expects somebody else to run the event	528	AnyEvent is slightly different: it expects somebody else to run the event
…		…
563	after => 1,	592	after => 1,
564	cb => sub { $result_ready->send },	593	cb => sub { $result_ready->send },
565	);	594	);
566		595
567	# this "blocks" (while handling events) till the callback	596	# this "blocks" (while handling events) till the callback
568	# calls -<send	597	# calls ->send
569	$result_ready->recv;	598	$result_ready->recv;
570		599
571	Example: wait for a timer, but take advantage of the fact that condition	600	Example: wait for a timer, but take advantage of the fact that condition
572	variables are also callable directly.	601	variables are also callable directly.
573		602
…		…
637	one. For example, a function that pings many hosts in parallel might want	666	one. For example, a function that pings many hosts in parallel might want
638	to use a condition variable for the whole process.	667	to use a condition variable for the whole process.
639		668
640	Every call to C<< ->begin >> will increment a counter, and every call to	669	Every call to C<< ->begin >> will increment a counter, and every call to
641	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end	670	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end
642	>>, the (last) callback passed to C<begin> will be executed. That callback	671	>>, the (last) callback passed to C<begin> will be executed, passing the
643	is I<supposed> to call C<< ->send >>, but that is not required. If no	672	condvar as first argument. That callback is I<supposed> to call C<< ->send
644	callback was set, C<send> will be called without any arguments.	673	>>, but that is not required. If no group callback was set, C<send> will
		674	be called without any arguments.
645		675
646	You can think of C<< $cv->send >> giving you an OR condition (one call	676	You can think of C<< $cv->send >> giving you an OR condition (one call
647	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND	677	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND
648	condition (all C<begin> calls must be C<end>'ed before the condvar sends).	678	condition (all C<begin> calls must be C<end>'ed before the condvar sends).
649		679
…		…
676	begung can potentially be zero:	706	begung can potentially be zero:
677		707
678	my $cv = AnyEvent->condvar;	708	my $cv = AnyEvent->condvar;
679		709
680	my %result;	710	my %result;
681	$cv->begin (sub { $cv->send (\%result) });	711	$cv->begin (sub { shift->send (\%result) });
682		712
683	for my $host (@list_of_hosts) {	713	for my $host (@list_of_hosts) {
684	$cv->begin;	714	$cv->begin;
685	ping_host_then_call_callback $host, sub {	715	ping_host_then_call_callback $host, sub {
686	$result{$host} = ...;	716	$result{$host} = ...;
…		…
761	=item $cb = $cv->cb ($cb->($cv))	791	=item $cb = $cv->cb ($cb->($cv))
762		792
763	This is a mutator function that returns the callback set and optionally	793	This is a mutator function that returns the callback set and optionally
764	replaces it before doing so.	794	replaces it before doing so.
765		795
766	The callback will be called when the condition becomes "true", i.e. when	796	The callback will be called when the condition becomes (or already was)
767	C<send> or C<croak> are called, with the only argument being the condition	797	"true", i.e. when C<send> or C<croak> are called (or were called), with
768	variable itself. Calling C<recv> inside the callback or at any later time	798	the only argument being the condition variable itself. Calling C<recv>
769	is guaranteed not to block.	799	inside the callback or at any later time is guaranteed not to block.
770		800
771	=back	801	=back
772		802
773	=head1 SUPPORTED EVENT LOOPS/BACKENDS	803	=head1 SUPPORTED EVENT LOOPS/BACKENDS
774		804
…		…
777	=over 4	807	=over 4
778		808
779	=item Backends that are autoprobed when no other event loop can be found.	809	=item Backends that are autoprobed when no other event loop can be found.
780		810
781	EV is the preferred backend when no other event loop seems to be in	811	EV is the preferred backend when no other event loop seems to be in
782	use. If EV is not installed, then AnyEvent will try Event, and, failing	812	use. If EV is not installed, then AnyEvent will fall back to its own
783	that, will fall back to its own pure-perl implementation, which is	813	pure-perl implementation, which is available everywhere as it comes with
784	available everywhere as it comes with AnyEvent itself.	814	AnyEvent itself.
785		815
786	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	816	AnyEvent::Impl::EV based on EV (interface to libev, best choice).
787	AnyEvent::Impl::Event based on Event, very stable, few glitches.
788	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.	817	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.
789		818
790	=item Backends that are transparently being picked up when they are used.	819	=item Backends that are transparently being picked up when they are used.
791		820
792	These will be used when they are currently loaded when the first watcher	821	These will be used when they are currently loaded when the first watcher
793	is created, in which case it is assumed that the application is using	822	is created, in which case it is assumed that the application is using
794	them. This means that AnyEvent will automatically pick the right backend	823	them. This means that AnyEvent will automatically pick the right backend
795	when the main program loads an event module before anything starts to	824	when the main program loads an event module before anything starts to
796	create watchers. Nothing special needs to be done by the main program.	825	create watchers. Nothing special needs to be done by the main program.
797		826
		827	AnyEvent::Impl::Event based on Event, very stable, few glitches.
798	AnyEvent::Impl::Glib based on Glib, slow but very stable.	828	AnyEvent::Impl::Glib based on Glib, slow but very stable.
799	AnyEvent::Impl::Tk based on Tk, very broken.	829	AnyEvent::Impl::Tk based on Tk, very broken.
800	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	830	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
801	AnyEvent::Impl::POE based on POE, very slow, some limitations.	831	AnyEvent::Impl::POE based on POE, very slow, some limitations.
802	AnyEvent::Impl::Irssi used when running within irssi.	832	AnyEvent::Impl::Irssi used when running within irssi.
…		…
1076		1106
1077	package AnyEvent;	1107	package AnyEvent;
1078		1108
1079	# basically a tuned-down version of common::sense	1109	# basically a tuned-down version of common::sense
1080	sub common_sense {	1110	sub common_sense {
1081	# no warnings	1111	# from common:.sense 1.0
1082	${^WARNING_BITS} ^= ${^WARNING_BITS};	1112	${^WARNING_BITS} = "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03";
1083	# use strict vars subs	1113	# use strict vars subs
1084	$^H \|= 0x00000600;	1114	$^H \|= 0x00000600;
1085	}	1115	}
1086		1116
1087	BEGIN { AnyEvent::common_sense }	1117	BEGIN { AnyEvent::common_sense }
1088		1118
1089	use Carp ();	1119	use Carp ();
1090		1120
1091	our $VERSION = 4.881;	1121	our $VERSION = '5.202';
1092	our $MODEL;	1122	our $MODEL;
1093		1123
1094	our $AUTOLOAD;	1124	our $AUTOLOAD;
1095	our @ISA;	1125	our @ISA;
1096		1126
…		…
1122	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1152	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1123	}	1153	}
1124		1154
1125	my @models = (	1155	my @models = (
1126	[EV:: => AnyEvent::Impl::EV:: , 1],	1156	[EV:: => AnyEvent::Impl::EV:: , 1],
1127	[Event:: => AnyEvent::Impl::Event::, 1],
1128	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1157	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],
1129	# everything below here will not (normally) be autoprobed	1158	# everything below here will not (normally) be autoprobed
1130	# as the pureperl backend should work everywhere	1159	# as the pureperl backend should work everywhere
1131	# and is usually faster	1160	# and is usually faster
		1161	[Event:: => AnyEvent::Impl::Event::, 1],
1132	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1162	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1133	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1163	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1134	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package	1164	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1135	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1165	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1136	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1166	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
…		…
1139	[Prima:: => AnyEvent::Impl::POE::],	1169	[Prima:: => AnyEvent::Impl::POE::],
1140	# IO::Async is just too broken - we would need workarounds for its	1170	# IO::Async is just too broken - we would need workarounds for its
1141	# byzantine signal and broken child handling, among others.	1171	# byzantine signal and broken child handling, among others.
1142	# IO::Async is rather hard to detect, as it doesn't have any	1172	# IO::Async is rather hard to detect, as it doesn't have any
1143	# obvious default class.	1173	# obvious default class.
1144	# [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program	1174	[IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1145	# [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program	1175	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1146	# [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program	1176	[IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
		1177	[AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
1147	);	1178	);
1148		1179
1149	our %method = map +($_ => 1),	1180	our %method = map +($_ => 1),
1150	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1181	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1151		1182
…		…
1258	# we assume CLOEXEC is already set by perl in all important cases	1289	# we assume CLOEXEC is already set by perl in all important cases
1259		1290
1260	($fh2, $rw)	1291	($fh2, $rw)
1261	}	1292	}
1262		1293
		1294	=head1 SIMPLIFIED AE API
		1295
		1296	Starting with version 5.0, AnyEvent officially supports a second, much
		1297	simpler, API that is designed to reduce the calling, typing and memory
		1298	overhead.
		1299
		1300	See the L<AE> manpage for details.
		1301
		1302	=cut
		1303
		1304	package AE;
		1305
		1306	our $VERSION = $AnyEvent::VERSION;
		1307
		1308	sub io($$$) {
		1309	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1310	}
		1311
		1312	sub timer($$$) {
		1313	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
		1314	}
		1315
		1316	sub signal($$) {
		1317	AnyEvent->signal (signal => $_[0], cb => $_[1])
		1318	}
		1319
		1320	sub child($$) {
		1321	AnyEvent->child (pid => $_[0], cb => $_[1])
		1322	}
		1323
		1324	sub idle($) {
		1325	AnyEvent->idle (cb => $_[0])
		1326	}
		1327
		1328	sub cv(;&) {
		1329	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
		1330	}
		1331
		1332	sub now() {
		1333	AnyEvent->now
		1334	}
		1335
		1336	sub now_update() {
		1337	AnyEvent->now_update
		1338	}
		1339
		1340	sub time() {
		1341	AnyEvent->time
		1342	}
		1343
1263	package AnyEvent::Base;	1344	package AnyEvent::Base;
1264		1345
1265	# default implementations for many methods	1346	# default implementations for many methods
1266		1347
1267	sub _time {	1348	sub _time() {
1268	# probe for availability of Time::HiRes	1349	# probe for availability of Time::HiRes
1269	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1350	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1270	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1351	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;
1271	*_time = \&Time::HiRes::time;	1352	*_time = \&Time::HiRes::time;
1272	# if (eval "use POSIX (); (POSIX::times())...	1353	# if (eval "use POSIX (); (POSIX::times())...
…		…
1292		1373
1293	our $HAVE_ASYNC_INTERRUPT;	1374	our $HAVE_ASYNC_INTERRUPT;
1294		1375
1295	sub _have_async_interrupt() {	1376	sub _have_async_interrupt() {
1296	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}	1377	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
1297	&& eval "use Async::Interrupt 1.0 (); 1")	1378	&& eval "use Async::Interrupt 1.02 (); 1")
1298	unless defined $HAVE_ASYNC_INTERRUPT;	1379	unless defined $HAVE_ASYNC_INTERRUPT;
1299		1380
1300	$HAVE_ASYNC_INTERRUPT	1381	$HAVE_ASYNC_INTERRUPT
1301	}	1382	}
1302		1383
…		…
1305	our ($SIG_COUNT, $SIG_TW);	1386	our ($SIG_COUNT, $SIG_TW);
1306		1387
1307	sub _signal_exec {	1388	sub _signal_exec {
1308	$HAVE_ASYNC_INTERRUPT	1389	$HAVE_ASYNC_INTERRUPT
1309	? $SIGPIPE_R->drain	1390	? $SIGPIPE_R->drain
1310	: sysread $SIGPIPE_R, my $dummy, 9;	1391	: sysread $SIGPIPE_R, (my $dummy), 9;
1311		1392
1312	while (%SIG_EV) {	1393	while (%SIG_EV) {
1313	for (keys %SIG_EV) {	1394	for (keys %SIG_EV) {
1314	delete $SIG_EV{$_};	1395	delete $SIG_EV{$_};
1315	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1396	$_->() for values %{ $SIG_CB{$_} \|\| {} };
…		…
1319		1400
1320	# install a dummy wakeup watcher to reduce signal catching latency	1401	# install a dummy wakeup watcher to reduce signal catching latency
1321	sub _sig_add() {	1402	sub _sig_add() {
1322	unless ($SIG_COUNT++) {	1403	unless ($SIG_COUNT++) {
1323	# try to align timer on a full-second boundary, if possible	1404	# try to align timer on a full-second boundary, if possible
1324	my $NOW = AnyEvent->now;	1405	my $NOW = AE::now;
1325		1406
1326	$SIG_TW = AnyEvent->timer (	1407	$SIG_TW = AE::timer
1327	after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW),	1408	$MAX_SIGNAL_LATENCY - ($NOW - int $NOW),
1328	interval => $MAX_SIGNAL_LATENCY,	1409	$MAX_SIGNAL_LATENCY,
1329	cb => sub { }, # just for the PERL_ASYNC_CHECK	1410	sub { } # just for the PERL_ASYNC_CHECK
1330	);	1411	;
1331	}	1412	}
1332	}	1413	}
1333		1414
1334	sub _sig_del {	1415	sub _sig_del {
1335	undef $SIG_TW	1416	undef $SIG_TW
1336	unless --$SIG_COUNT;	1417	unless --$SIG_COUNT;
1337	}	1418	}
1338		1419
1339	our %SIGNAME2NUM;
1340	our @SIGNUM2NAME;
1341	our $_sig_name_init; $_sig_name_init = sub {	1420	our $_sig_name_init; $_sig_name_init = sub {
		1421	eval q{ # poor man's autoloading
1342	undef $_sig_name_init;	1422	undef $_sig_name_init;
1343		1423
1344	if (_have_async_interrupt) {	1424	if (_have_async_interrupt) {
1345	*sig2num = \&Async::Interrupt::sig2num;	1425	*sig2num = \&Async::Interrupt::sig2num;
1346	*sig2name = \&Async::Interrupt::sig2name;	1426	*sig2name = \&Async::Interrupt::sig2name;
1347	} else {	1427	} else {
1348	require Config;	1428	require Config;
1349		1429
		1430	my %signame2num;
1350	@SIGNAME2NUM{ split ' ', $Config::Config{sig_name} }	1431	@signame2num{ split ' ', $Config::Config{sig_name} }
1351	= split ' ', $Config::Config{sig_num};	1432	= split ' ', $Config::Config{sig_num};
1352	@SIGNUM2NAME[values %SIGNAME2NUM] = keys %SIGNAME2NUM;
1353		1433
		1434	my @signum2name;
		1435	@signum2name[values %signame2num] = keys %signame2num;
		1436
1354	*sig2num = sub($) {	1437	*sig2num = sub($) {
1355	$_[0] > 0 ? shift : $SIGNAME2NUM{+shift}	1438	$_[0] > 0 ? shift : $signame2num{+shift}
1356	};	1439	};
1357	*sig2name = sub ($) {	1440	*sig2name = sub ($) {
1358	$_[0] > 0 ? $SIGNUM2NAME[+shift] : shift	1441	$_[0] > 0 ? $signum2name[+shift] : shift
		1442	};
1359	};	1443	}
1360	}	1444	};
		1445	die if $@;
1361	};	1446	};
1362		1447
1363	sub sig2num ($) { &$_sig_name_init; &sig2num }	1448	sub sig2num ($) { &$_sig_name_init; &sig2num }
1364	sub sig2name($) { &$_sig_name_init; &sig2name }	1449	sub sig2name($) { &$_sig_name_init; &sig2name }
1365		1450
1366	sub _signal {	1451	sub signal {
		1452	eval q{ # poor man's autoloading {}
		1453	# probe for availability of Async::Interrupt
		1454	if (_have_async_interrupt) {
		1455	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1456
		1457	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1458	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
		1459
		1460	} else {
		1461	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1462
		1463	require Fcntl;
		1464
		1465	if (AnyEvent::WIN32) {
		1466	require AnyEvent::Util;
		1467
		1468	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1469	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1470	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1471	} else {
		1472	pipe $SIGPIPE_R, $SIGPIPE_W;
		1473	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1474	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1475
		1476	# not strictly required, as $^F is normally 2, but let's make sure...
		1477	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1478	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1479	}
		1480
		1481	$SIGPIPE_R
		1482	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1483
		1484	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;
		1485	}
		1486
		1487	*signal = sub {
1367	my (undef, %arg) = @_;	1488	my (undef, %arg) = @_;
1368		1489
1369	my $signal = uc $arg{signal}	1490	my $signal = uc $arg{signal}
1370	or Carp::croak "required option 'signal' is missing";	1491	or Carp::croak "required option 'signal' is missing";
1371		1492
1372	if ($HAVE_ASYNC_INTERRUPT) {	1493	if ($HAVE_ASYNC_INTERRUPT) {
1373	# async::interrupt	1494	# async::interrupt
1374		1495
1375	$signal = sig2num $signal;	1496	$signal = sig2num $signal;
1376	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1497	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1377		1498
1378	$SIG_ASY{$signal} \|\|= new Async::Interrupt	1499	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1379	cb => sub { undef $SIG_EV{$signal} },	1500	cb => sub { undef $SIG_EV{$signal} },
1380	signal => $signal,	1501	signal => $signal,
1381	pipe => [$SIGPIPE_R->filenos],	1502	pipe => [$SIGPIPE_R->filenos],
1382	pipe_autodrain => 0,	1503	pipe_autodrain => 0,
1383	;	1504	;
1384		1505
1385	} else {	1506	} else {
1386	# pure perl	1507	# pure perl
1387		1508
1388	# AE::Util has been loaded in signal	1509	# AE::Util has been loaded in signal
1389	$signal = sig2name $signal;	1510	$signal = sig2name $signal;
1390	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1511	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1391		1512
1392	$SIG{$signal} \|\|= sub {	1513	$SIG{$signal} \|\|= sub {
1393	local $!;	1514	local $!;
1394	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1515	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
1395	undef $SIG_EV{$signal};	1516	undef $SIG_EV{$signal};
		1517	};
		1518
		1519	# can't do signal processing without introducing races in pure perl,
		1520	# so limit the signal latency.
		1521	_sig_add;
		1522	}
		1523
		1524	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1396	};	1525	};
1397		1526
1398	# can't do signal processing without introducing races in pure perl,	1527	*AnyEvent::Base::signal::DESTROY = sub {
1399	# so limit the signal latency.	1528	my ($signal, $cb) = @{$_[0]};
		1529
1400	_sig_add;	1530	_sig_del;
1401	}
1402		1531
1403	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"	1532	delete $SIG_CB{$signal}{$cb};
1404	}
1405		1533
1406	sub signal {	1534	$HAVE_ASYNC_INTERRUPT
1407	# probe for availability of Async::Interrupt	1535	? delete $SIG_ASY{$signal}
1408	if (_have_async_interrupt) {	1536	: # delete doesn't work with older perls - they then
1409	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1537	# print weird messages, or just unconditionally exit
1410		1538	# instead of getting the default action.
1411	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1539	undef $SIG{$signal}
1412	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);	1540	unless keys %{ $SIG_CB{$signal} };
1413
1414	} else {
1415	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1416
1417	require Fcntl;
1418
1419	if (AnyEvent::WIN32) {
1420	require AnyEvent::Util;
1421
1422	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1423	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1424	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1425	} else {
1426	pipe $SIGPIPE_R, $SIGPIPE_W;
1427	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1428	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1429
1430	# not strictly required, as $^F is normally 2, but let's make sure...
1431	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1432	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1433	}	1541	};
1434
1435	$SIGPIPE_R
1436	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1437
1438	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1439	}	1542	};
1440		1543	die if $@;
1441	*signal = \&_signal;
1442	&signal	1544	&signal
1443	}
1444
1445	sub AnyEvent::Base::signal::DESTROY {
1446	my ($signal, $cb) = @{$_[0]};
1447
1448	_sig_del;
1449
1450	delete $SIG_CB{$signal}{$cb};
1451
1452	$HAVE_ASYNC_INTERRUPT
1453	? delete $SIG_ASY{$signal}
1454	: # delete doesn't work with older perls - they then
1455	# print weird messages, or just unconditionally exit
1456	# instead of getting the default action.
1457	undef $SIG{$signal}
1458	unless keys %{ $SIG_CB{$signal} };
1459	}	1545	}
1460		1546
1461	# default implementation for ->child	1547	# default implementation for ->child
1462		1548
1463	our %PID_CB;	1549	our %PID_CB;
…		…
1492	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1578	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1493	? 1	1579	? 1
1494	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1580	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1495		1581
1496	unless ($CHLD_W) {	1582	unless ($CHLD_W) {
1497	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);	1583	$CHLD_W = AE::signal CHLD => \&_sigchld;
1498	# child could be a zombie already, so make at least one round	1584	# child could be a zombie already, so make at least one round
1499	&_sigchld;	1585	&_sigchld;
1500	}	1586	}
1501		1587
1502	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1588	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
…		…
1528	# never use more then 50% of the time for the idle watcher,	1614	# never use more then 50% of the time for the idle watcher,
1529	# within some limits	1615	# within some limits
1530	$w = 0.0001 if $w < 0.0001;	1616	$w = 0.0001 if $w < 0.0001;
1531	$w = 5 if $w > 5;	1617	$w = 5 if $w > 5;
1532		1618
1533	$w = AnyEvent->timer (after => $w, cb => $rcb);	1619	$w = AE::timer $w, 0, $rcb;
1534	} else {	1620	} else {
1535	# clean up...	1621	# clean up...
1536	undef $w;	1622	undef $w;
1537	undef $rcb;	1623	undef $rcb;
1538	}	1624	}
1539	};	1625	};
1540		1626
1541	$w = AnyEvent->timer (after => 0.05, cb => $rcb);	1627	$w = AE::timer 0.05, 0, $rcb;
1542		1628
1543	bless \\$cb, "AnyEvent::Base::idle"	1629	bless \\$cb, "AnyEvent::Base::idle"
1544	}	1630	}
1545		1631
1546	sub AnyEvent::Base::idle::DESTROY {	1632	sub AnyEvent::Base::idle::DESTROY {
…		…
1600	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1686	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};
1601	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1687	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]
1602	}	1688	}
1603		1689
1604	sub cb {	1690	sub cb {
1605	$_[0]{_ae_cb} = $_[1] if @_ > 1;	1691	my $cv = shift;
		1692
		1693	@_
		1694	and $cv->{_ae_cb} = shift
		1695	and $cv->{_ae_sent}
		1696	and (delete $cv->{_ae_cb})->($cv);
		1697
1606	$_[0]{_ae_cb}	1698	$cv->{_ae_cb}
1607	}	1699	}
1608		1700
1609	sub begin {	1701	sub begin {
1610	++$_[0]{_ae_counter};	1702	++$_[0]{_ae_counter};
1611	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;	1703	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;
…		…
1820	warn "read: $input\n"; # output what has been read	1912	warn "read: $input\n"; # output what has been read
1821	$cv->send if $input =~ /^q/i; # quit program if /^q/i	1913	$cv->send if $input =~ /^q/i; # quit program if /^q/i
1822	},	1914	},
1823	);	1915	);
1824		1916
1825	my $time_watcher; # can only be used once
1826
1827	sub new_timer {
1828	$timer = AnyEvent->timer (after => 1, cb => sub {	1917	my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub {
1829	warn "timeout\n"; # print 'timeout' about every second	1918	warn "timeout\n"; # print 'timeout' at most every second
1830	&new_timer; # and restart the time
1831	});	1919	});
1832	}
1833
1834	new_timer; # create first timer
1835		1920
1836	$cv->recv; # wait until user enters /^q/i	1921	$cv->recv; # wait until user enters /^q/i
1837		1922
1838	=head1 REAL-WORLD EXAMPLE	1923	=head1 REAL-WORLD EXAMPLE
1839		1924
…		…
1970	through AnyEvent. The benchmark creates a lot of timers (with a zero	2055	through AnyEvent. The benchmark creates a lot of timers (with a zero
1971	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,	2056	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,
1972	which it is), lets them fire exactly once and destroys them again.	2057	which it is), lets them fire exactly once and destroys them again.
1973		2058
1974	Source code for this benchmark is found as F<eg/bench> in the AnyEvent	2059	Source code for this benchmark is found as F<eg/bench> in the AnyEvent
1975	distribution.	2060	distribution. It uses the L<AE> interface, which makes a real difference
		2061	for the EV and Perl backends only.
1976		2062
1977	=head3 Explanation of the columns	2063	=head3 Explanation of the columns
1978		2064
1979	I<watcher> is the number of event watchers created/destroyed. Since	2065	I<watcher> is the number of event watchers created/destroyed. Since
1980	different event models feature vastly different performances, each event	2066	different event models feature vastly different performances, each event
…		…
2001	watcher.	2087	watcher.
2002		2088
2003	=head3 Results	2089	=head3 Results
2004		2090
2005	name watchers bytes create invoke destroy comment	2091	name watchers bytes create invoke destroy comment
2006	EV/EV 400000 224 0.47 0.35 0.27 EV native interface	2092	EV/EV 100000 223 0.47 0.43 0.27 EV native interface
2007	EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers	2093	EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers
2008	CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal	2094	Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal
2009	Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation	2095	Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation
2010	Event/Event 16000 517 32.20 31.80 0.81 Event native interface	2096	Event/Event 16000 516 31.16 31.84 0.82 Event native interface
2011	Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers	2097	Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers
2012	IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll	2098	IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll
2013	IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll	2099	IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll
2014	Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour	2100	Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour
2015	Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers	2101	Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers
2016	POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event	2102	POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event
2017	POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select	2103	POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select
2018		2104
2019	=head3 Discussion	2105	=head3 Discussion
2020		2106
2021	The benchmark does I<not> measure scalability of the event loop very	2107	The benchmark does I<not> measure scalability of the event loop very
2022	well. For example, a select-based event loop (such as the pure perl one)	2108	well. For example, a select-based event loop (such as the pure perl one)
…		…
2034	benchmark machine, handling an event takes roughly 1600 CPU cycles with	2120	benchmark machine, handling an event takes roughly 1600 CPU cycles with
2035	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU	2121	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU
2036	cycles with POE.	2122	cycles with POE.
2037		2123
2038	C<EV> is the sole leader regarding speed and memory use, which are both	2124	C<EV> is the sole leader regarding speed and memory use, which are both
2039	maximal/minimal, respectively. Even when going through AnyEvent, it uses	2125	maximal/minimal, respectively. When using the L<AE> API there is zero
		2126	overhead (when going through the AnyEvent API create is about 5-6 times
		2127	slower, with other times being equal, so still uses far less memory than
2040	far less memory than any other event loop and is still faster than Event	2128	any other event loop and is still faster than Event natively).
2041	natively.
2042		2129
2043	The pure perl implementation is hit in a few sweet spots (both the	2130	The pure perl implementation is hit in a few sweet spots (both the
2044	constant timeout and the use of a single fd hit optimisations in the perl	2131	constant timeout and the use of a single fd hit optimisations in the perl
2045	interpreter and the backend itself). Nevertheless this shows that it	2132	interpreter and the backend itself). Nevertheless this shows that it
2046	adds very little overhead in itself. Like any select-based backend its	2133	adds very little overhead in itself. Like any select-based backend its
…		…
2120	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100	2207	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100
2121	(1%) are active. This mirrors the activity of large servers with many	2208	(1%) are active. This mirrors the activity of large servers with many
2122	connections, most of which are idle at any one point in time.	2209	connections, most of which are idle at any one point in time.
2123		2210
2124	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent	2211	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent
2125	distribution.	2212	distribution. It uses the L<AE> interface, which makes a real difference
		2213	for the EV and Perl backends only.
2126		2214
2127	=head3 Explanation of the columns	2215	=head3 Explanation of the columns
2128		2216
2129	I<sockets> is the number of sockets, and twice the number of "servers" (as	2217	I<sockets> is the number of sockets, and twice the number of "servers" (as
2130	each server has a read and write socket end).	2218	each server has a read and write socket end).
…		…
2138	a new one that moves the timeout into the future.	2226	a new one that moves the timeout into the future.
2139		2227
2140	=head3 Results	2228	=head3 Results
2141		2229
2142	name sockets create request	2230	name sockets create request
2143	EV 20000 69.01 11.16	2231	EV 20000 62.66 7.99
2144	Perl 20000 73.32 35.87	2232	Perl 20000 68.32 32.64
2145	IOAsync 20000 157.00 98.14 epoll	2233	IOAsync 20000 174.06 101.15 epoll
2146	IOAsync 20000 159.31 616.06 poll	2234	IOAsync 20000 174.67 610.84 poll
2147	Event 20000 212.62 257.32	2235	Event 20000 202.69 242.91
2148	Glib 20000 651.16 1896.30	2236	Glib 20000 557.01 1689.52
2149	POE 20000 349.67 12317.24 uses POE::Loop::Event	2237	POE 20000 341.54 12086.32 uses POE::Loop::Event
2150		2238
2151	=head3 Discussion	2239	=head3 Discussion
2152		2240
2153	This benchmark I<does> measure scalability and overall performance of the	2241	This benchmark I<does> measure scalability and overall performance of the
2154	particular event loop.	2242	particular event loop.
…		…
2280	As you can see, the AnyEvent + EV combination even beats the	2368	As you can see, the AnyEvent + EV combination even beats the
2281	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl	2369	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl
2282	backend easily beats IO::Lambda and POE.	2370	backend easily beats IO::Lambda and POE.
2283		2371
2284	And even the 100% non-blocking version written using the high-level (and	2372	And even the 100% non-blocking version written using the high-level (and
2285	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a	2373	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda
2286	large margin, even though it does all of DNS, tcp-connect and socket I/O	2374	higher level ("unoptimised") abstractions by a large margin, even though
2287	in a non-blocking way.	2375	it does all of DNS, tcp-connect and socket I/O in a non-blocking way.
2288		2376
2289	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and	2377	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and
2290	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are	2378	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are
2291	part of the IO::lambda distribution and were used without any changes.	2379	part of the IO::Lambda distribution and were used without any changes.
2292		2380
2293		2381
2294	=head1 SIGNALS	2382	=head1 SIGNALS
2295		2383
2296	AnyEvent currently installs handlers for these signals:	2384	AnyEvent currently installs handlers for these signals:
…		…
2385	lot less memory), but otherwise doesn't affect guard operation much. It is	2473	lot less memory), but otherwise doesn't affect guard operation much. It is
2386	purely used for performance.	2474	purely used for performance.
2387		2475
2388	=item L<JSON> and L<JSON::XS>	2476	=item L<JSON> and L<JSON::XS>
2389		2477
2390	This module is required when you want to read or write JSON data via	2478	One of these modules is required when you want to read or write JSON data
2391	L<AnyEvent::Handle>. It is also written in pure-perl, but can take	2479	via L<AnyEvent::Handle>. It is also written in pure-perl, but can take
2392	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.	2480	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.
2393		2481
2394	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is	2482	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is
2395	installed.	2483	installed.
2396		2484

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.263 by root, Wed Jul 29 12:39:21 2009 UTC vs. Revision 1.295 by root, Wed Oct 28 02:42:06 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.263 by root, Wed Jul 29 12:39:21 2009 UTC vs.
Revision 1.295 by root, Wed Oct 28 02:42:06 2009 UTC