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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.262 by root, Tue Jul 28 13:08:17 2009 UTC vs.
Revision 1.279 by root, Sun Aug 9 16:05:11 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
…		…
761	=item $cb = $cv->cb ($cb->($cv))	790	=item $cb = $cv->cb ($cb->($cv))
762		791
763	This is a mutator function that returns the callback set and optionally	792	This is a mutator function that returns the callback set and optionally
764	replaces it before doing so.	793	replaces it before doing so.
765		794
766	The callback will be called when the condition becomes "true", i.e. when	795	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	796	"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	797	the only argument being the condition variable itself. Calling C<recv>
769	is guaranteed not to block.	798	inside the callback or at any later time is guaranteed not to block.
770		799
771	=back	800	=back
772		801
773	=head1 SUPPORTED EVENT LOOPS/BACKENDS	802	=head1 SUPPORTED EVENT LOOPS/BACKENDS
774		803
…		…
777	=over 4	806	=over 4
778		807
779	=item Backends that are autoprobed when no other event loop can be found.	808	=item Backends that are autoprobed when no other event loop can be found.
780		809
781	EV is the preferred backend when no other event loop seems to be in	810	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	811	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	812	pure-perl implementation, which is available everywhere as it comes with
784	available everywhere as it comes with AnyEvent itself.	813	AnyEvent itself.
785		814
786	AnyEvent::Impl::EV based on EV (interface to libev, best choice).	815	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.	816	AnyEvent::Impl::Perl pure-perl implementation, fast and portable.
789		817
790	=item Backends that are transparently being picked up when they are used.	818	=item Backends that are transparently being picked up when they are used.
791		819
792	These will be used when they are currently loaded when the first watcher	820	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	821	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	822	them. This means that AnyEvent will automatically pick the right backend
795	when the main program loads an event module before anything starts to	823	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.	824	create watchers. Nothing special needs to be done by the main program.
797		825
		826	AnyEvent::Impl::Event based on Event, very stable, few glitches.
798	AnyEvent::Impl::Glib based on Glib, slow but very stable.	827	AnyEvent::Impl::Glib based on Glib, slow but very stable.
799	AnyEvent::Impl::Tk based on Tk, very broken.	828	AnyEvent::Impl::Tk based on Tk, very broken.
800	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	829	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
801	AnyEvent::Impl::POE based on POE, very slow, some limitations.	830	AnyEvent::Impl::POE based on POE, very slow, some limitations.
802	AnyEvent::Impl::Irssi used when running within irssi.	831	AnyEvent::Impl::Irssi used when running within irssi.
…		…
1086		1115
1087	BEGIN { AnyEvent::common_sense }	1116	BEGIN { AnyEvent::common_sense }
1088		1117
1089	use Carp ();	1118	use Carp ();
1090		1119
1091	our $VERSION = 4.881;	1120	our $VERSION = '5.0';
1092	our $MODEL;	1121	our $MODEL;
1093		1122
1094	our $AUTOLOAD;	1123	our $AUTOLOAD;
1095	our @ISA;	1124	our @ISA;
1096		1125
…		…
1122	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1151	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1123	}	1152	}
1124		1153
1125	my @models = (	1154	my @models = (
1126	[EV:: => AnyEvent::Impl::EV:: , 1],	1155	[EV:: => AnyEvent::Impl::EV:: , 1],
1127	[Event:: => AnyEvent::Impl::Event::, 1],
1128	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],	1156	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],
1129	# everything below here will not (normally) be autoprobed	1157	# everything below here will not (normally) be autoprobed
1130	# as the pureperl backend should work everywhere	1158	# as the pureperl backend should work everywhere
1131	# and is usually faster	1159	# and is usually faster
		1160	[Event:: => AnyEvent::Impl::Event::, 1],
1132	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers	1161	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1133	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1162	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1134	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package	1163	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1135	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1164	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1136	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1165	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
…		…
1139	[Prima:: => AnyEvent::Impl::POE::],	1168	[Prima:: => AnyEvent::Impl::POE::],
1140	# IO::Async is just too broken - we would need workarounds for its	1169	# IO::Async is just too broken - we would need workarounds for its
1141	# byzantine signal and broken child handling, among others.	1170	# byzantine signal and broken child handling, among others.
1142	# IO::Async is rather hard to detect, as it doesn't have any	1171	# IO::Async is rather hard to detect, as it doesn't have any
1143	# obvious default class.	1172	# obvious default class.
1144	# [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program	1173	[IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1145	# [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program	1174	[IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1146	# [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program	1175	[IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
		1176	[AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
1147	);	1177	);
1148		1178
1149	our %method = map +($_ => 1),	1179	our %method = map +($_ => 1),
1150	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1180	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1151		1181
…		…
1258	# we assume CLOEXEC is already set by perl in all important cases	1288	# we assume CLOEXEC is already set by perl in all important cases
1259		1289
1260	($fh2, $rw)	1290	($fh2, $rw)
1261	}	1291	}
1262		1292
		1293	=head1 SIMPLIFIED AE API
		1294
		1295	Starting with version 5.0, AnyEvent officially supports a second, much
		1296	simpler, API that is designed to reduce the calling, typing and memory
		1297	overhead.
		1298
		1299	See the L<AE> manpage for details.
		1300
		1301	=cut
		1302
		1303	package AE;
		1304
		1305	our $VERSION = $AnyEvent::VERSION;
		1306
		1307	sub io($$$) {
		1308	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1309	}
		1310
		1311	sub timer($$$) {
		1312	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
		1313	}
		1314
		1315	sub signal($$) {
		1316	AnyEvent->signal (signal => $_[0], cb => $_[1])
		1317	}
		1318
		1319	sub child($$) {
		1320	AnyEvent->child (pid => $_[0], cb => $_[1])
		1321	}
		1322
		1323	sub idle($) {
		1324	AnyEvent->idle (cb => $_[0])
		1325	}
		1326
		1327	sub cv(;&) {
		1328	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
		1329	}
		1330
		1331	sub now() {
		1332	AnyEvent->now
		1333	}
		1334
		1335	sub now_update() {
		1336	AnyEvent->now_update
		1337	}
		1338
		1339	sub time() {
		1340	AnyEvent->time
		1341	}
		1342
1263	package AnyEvent::Base;	1343	package AnyEvent::Base;
1264		1344
1265	# default implementations for many methods	1345	# default implementations for many methods
1266		1346
1267	sub _time {	1347	sub _time {
…		…
1289	}	1369	}
1290		1370
1291	# default implementation for ->signal	1371	# default implementation for ->signal
1292		1372
1293	our $HAVE_ASYNC_INTERRUPT;	1373	our $HAVE_ASYNC_INTERRUPT;
		1374
		1375	sub _have_async_interrupt() {
		1376	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
		1377	&& eval "use Async::Interrupt 1.0 (); 1")
		1378	unless defined $HAVE_ASYNC_INTERRUPT;
		1379
		1380	$HAVE_ASYNC_INTERRUPT
		1381	}
		1382
1294	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1383	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1295	our (%SIG_ASY, %SIG_ASY_W);	1384	our (%SIG_ASY, %SIG_ASY_W);
1296	our ($SIG_COUNT, $SIG_TW);	1385	our ($SIG_COUNT, $SIG_TW);
1297		1386
1298	sub _signal_exec {	1387	sub _signal_exec {
…		…
1310		1399
1311	# install a dummy wakeup watcher to reduce signal catching latency	1400	# install a dummy wakeup watcher to reduce signal catching latency
1312	sub _sig_add() {	1401	sub _sig_add() {
1313	unless ($SIG_COUNT++) {	1402	unless ($SIG_COUNT++) {
1314	# try to align timer on a full-second boundary, if possible	1403	# try to align timer on a full-second boundary, if possible
1315	my $NOW = AnyEvent->now;	1404	my $NOW = AE::now;
1316		1405
1317	$SIG_TW = AnyEvent->timer (	1406	$SIG_TW = AE::timer
1318	after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW),	1407	$MAX_SIGNAL_LATENCY - ($NOW - int $NOW),
1319	interval => $MAX_SIGNAL_LATENCY,	1408	$MAX_SIGNAL_LATENCY,
1320	cb => sub { }, # just for the PERL_ASYNC_CHECK	1409	sub { } # just for the PERL_ASYNC_CHECK
1321	);	1410	;
1322	}	1411	}
1323	}	1412	}
1324		1413
1325	sub _sig_del {	1414	sub _sig_del {
1326	undef $SIG_TW	1415	undef $SIG_TW
1327	unless --$SIG_COUNT;	1416	unless --$SIG_COUNT;
1328	}	1417	}
1329		1418
		1419	our $_sig_name_init; $_sig_name_init = sub {
		1420	eval q{ # poor man's autoloading
		1421	undef $_sig_name_init;
		1422
		1423	if (_have_async_interrupt) {
		1424	*sig2num = \&Async::Interrupt::sig2num;
		1425	*sig2name = \&Async::Interrupt::sig2name;
		1426	} else {
		1427	require Config;
		1428
		1429	my %signame2num;
		1430	@signame2num{ split ' ', $Config::Config{sig_name} }
		1431	= split ' ', $Config::Config{sig_num};
		1432
		1433	my @signum2name;
		1434	@signum2name[values %signame2num] = keys %signame2num;
		1435
		1436	*sig2num = sub($) {
		1437	$_[0] > 0 ? shift : $signame2num{+shift}
		1438	};
		1439	*sig2name = sub ($) {
		1440	$_[0] > 0 ? $signum2name[+shift] : shift
		1441	};
		1442	}
		1443	};
		1444	die if $@;
		1445	};
		1446
		1447	sub sig2num ($) { &$_sig_name_init; &sig2num }
		1448	sub sig2name($) { &$_sig_name_init; &sig2name }
		1449
1330	sub _signal {	1450	sub signal {
		1451	eval q{ # poor man's autoloading {}
		1452	# probe for availability of Async::Interrupt
		1453	if (_have_async_interrupt) {
		1454	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1455
		1456	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1457	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
		1458
		1459	} else {
		1460	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1461
		1462	require Fcntl;
		1463
		1464	if (AnyEvent::WIN32) {
		1465	require AnyEvent::Util;
		1466
		1467	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1468	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1469	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1470	} else {
		1471	pipe $SIGPIPE_R, $SIGPIPE_W;
		1472	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1473	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1474
		1475	# not strictly required, as $^F is normally 2, but let's make sure...
		1476	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1477	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1478	}
		1479
		1480	$SIGPIPE_R
		1481	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1482
		1483	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;
		1484	}
		1485
		1486	*signal = sub {
1331	my (undef, %arg) = @_;	1487	my (undef, %arg) = @_;
1332		1488
1333	my $signal = uc $arg{signal}	1489	my $signal = uc $arg{signal}
1334	or Carp::croak "required option 'signal' is missing";	1490	or Carp::croak "required option 'signal' is missing";
1335		1491
1336	if ($HAVE_ASYNC_INTERRUPT) {	1492	if ($HAVE_ASYNC_INTERRUPT) {
1337	# async::interrupt	1493	# async::interrupt
1338		1494
1339	$signal = Async::Interrupt::sig2num ($signal);	1495	$signal = sig2num $signal;
1340	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1496	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1341		1497
1342	$SIG_ASY{$signal} \|\|= new Async::Interrupt	1498	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1343	cb => sub { undef $SIG_EV{$signal} },	1499	cb => sub { undef $SIG_EV{$signal} },
1344	signal => $signal,	1500	signal => $signal,
1345	pipe => [$SIGPIPE_R->filenos],	1501	pipe => [$SIGPIPE_R->filenos],
1346	pipe_autodrain => 0,	1502	pipe_autodrain => 0,
1347	;	1503	;
1348		1504
1349	} else {	1505	} else {
1350	# pure perl	1506	# pure perl
1351		1507
1352	# AE::Util has been loaded in signal	1508	# AE::Util has been loaded in signal
1353	$signal = AnyEvent::Util::sig2name ($signal);	1509	$signal = sig2name $signal;
1354	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1510	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1355		1511
1356	$SIG{$signal} \|\|= sub {	1512	$SIG{$signal} \|\|= sub {
1357	local $!;	1513	local $!;
1358	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1514	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
1359	undef $SIG_EV{$signal};	1515	undef $SIG_EV{$signal};
		1516	};
		1517
		1518	# can't do signal processing without introducing races in pure perl,
		1519	# so limit the signal latency.
		1520	_sig_add;
		1521	}
		1522
		1523	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1360	};	1524	};
1361		1525
1362	# can't do signal processing without introducing races in pure perl,	1526	*AnyEvent::Base::signal::DESTROY = sub {
1363	# so limit the signal latency.	1527	my ($signal, $cb) = @{$_[0]};
		1528
1364	_sig_add;	1529	_sig_del;
1365	}
1366		1530
1367	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"	1531	delete $SIG_CB{$signal}{$cb};
1368	}
1369		1532
1370	sub signal {
1371	# probe for availability of Async::Interrupt
1372	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 1.0 (); 1") {
1373	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1374
1375	$HAVE_ASYNC_INTERRUPT = 1;	1533	$HAVE_ASYNC_INTERRUPT
1376	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1534	? delete $SIG_ASY{$signal}
1377	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);	1535	: # delete doesn't work with older perls - they then
1378		1536	# print weird messages, or just unconditionally exit
1379	} else {	1537	# instead of getting the default action.
1380	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1538	undef $SIG{$signal}
1381		1539	unless keys %{ $SIG_CB{$signal} };
1382	require Fcntl;
1383
1384	if (AnyEvent::WIN32) {
1385	require AnyEvent::Util;
1386
1387	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1388	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1389	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1390	} else {
1391	pipe $SIGPIPE_R, $SIGPIPE_W;
1392	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1393	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1394
1395	# not strictly required, as $^F is normally 2, but let's make sure...
1396	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1397	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1398	}	1540	};
1399
1400	$SIGPIPE_R
1401	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1402
1403	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1404	}	1541	};
1405		1542	die if $@;
1406	*signal = \&_signal;
1407	&signal	1543	&signal
1408	}
1409
1410	sub AnyEvent::Base::signal::DESTROY {
1411	my ($signal, $cb) = @{$_[0]};
1412
1413	_sig_del;
1414
1415	delete $SIG_CB{$signal}{$cb};
1416
1417	$HAVE_ASYNC_INTERRUPT
1418	? delete $SIG_ASY{$signal}
1419	: # delete doesn't work with older perls - they then
1420	# print weird messages, or just unconditionally exit
1421	# instead of getting the default action.
1422	undef $SIG{$signal}
1423	unless keys %{ $SIG_CB{$signal} };
1424	}	1544	}
1425		1545
1426	# default implementation for ->child	1546	# default implementation for ->child
1427		1547
1428	our %PID_CB;	1548	our %PID_CB;
…		…
1457	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1577	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1458	? 1	1578	? 1
1459	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1579	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1460		1580
1461	unless ($CHLD_W) {	1581	unless ($CHLD_W) {
1462	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);	1582	$CHLD_W = AE::signal CHLD => \&_sigchld;
1463	# child could be a zombie already, so make at least one round	1583	# child could be a zombie already, so make at least one round
1464	&_sigchld;	1584	&_sigchld;
1465	}	1585	}
1466		1586
1467	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1587	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
…		…
1493	# never use more then 50% of the time for the idle watcher,	1613	# never use more then 50% of the time for the idle watcher,
1494	# within some limits	1614	# within some limits
1495	$w = 0.0001 if $w < 0.0001;	1615	$w = 0.0001 if $w < 0.0001;
1496	$w = 5 if $w > 5;	1616	$w = 5 if $w > 5;
1497		1617
1498	$w = AnyEvent->timer (after => $w, cb => $rcb);	1618	$w = AE::timer $w, 0, $rcb;
1499	} else {	1619	} else {
1500	# clean up...	1620	# clean up...
1501	undef $w;	1621	undef $w;
1502	undef $rcb;	1622	undef $rcb;
1503	}	1623	}
1504	};	1624	};
1505		1625
1506	$w = AnyEvent->timer (after => 0.05, cb => $rcb);	1626	$w = AE::timer 0.05, 0, $rcb;
1507		1627
1508	bless \\$cb, "AnyEvent::Base::idle"	1628	bless \\$cb, "AnyEvent::Base::idle"
1509	}	1629	}
1510		1630
1511	sub AnyEvent::Base::idle::DESTROY {	1631	sub AnyEvent::Base::idle::DESTROY {
…		…
1565	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1685	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};
1566	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1686	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]
1567	}	1687	}
1568		1688
1569	sub cb {	1689	sub cb {
1570	$_[0]{_ae_cb} = $_[1] if @_ > 1;	1690	my $cv = shift;
		1691
		1692	@_
		1693	and $cv->{_ae_cb} = shift
		1694	and $cv->{_ae_sent}
		1695	and (delete $cv->{_ae_cb})->($cv);
		1696
1571	$_[0]{_ae_cb}	1697	$cv->{_ae_cb}
1572	}	1698	}
1573		1699
1574	sub begin {	1700	sub begin {
1575	++$_[0]{_ae_counter};	1701	++$_[0]{_ae_counter};
1576	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;	1702	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;
…		…
1935	through AnyEvent. The benchmark creates a lot of timers (with a zero	2061	through AnyEvent. The benchmark creates a lot of timers (with a zero
1936	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,	2062	timeout) and I/O watchers (watching STDOUT, a pty, to become writable,
1937	which it is), lets them fire exactly once and destroys them again.	2063	which it is), lets them fire exactly once and destroys them again.
1938		2064
1939	Source code for this benchmark is found as F<eg/bench> in the AnyEvent	2065	Source code for this benchmark is found as F<eg/bench> in the AnyEvent
1940	distribution.	2066	distribution. It uses the L<AE> interface, which makes a real difference
		2067	for the EV and Perl backends only.
1941		2068
1942	=head3 Explanation of the columns	2069	=head3 Explanation of the columns
1943		2070
1944	I<watcher> is the number of event watchers created/destroyed. Since	2071	I<watcher> is the number of event watchers created/destroyed. Since
1945	different event models feature vastly different performances, each event	2072	different event models feature vastly different performances, each event
…		…
1966	watcher.	2093	watcher.
1967		2094
1968	=head3 Results	2095	=head3 Results
1969		2096
1970	name watchers bytes create invoke destroy comment	2097	name watchers bytes create invoke destroy comment
1971	EV/EV 400000 224 0.47 0.35 0.27 EV native interface	2098	EV/EV 100000 223 0.47 0.43 0.27 EV native interface
1972	EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers	2099	EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers
1973	CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal	2100	Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal
1974	Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation	2101	Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation
1975	Event/Event 16000 517 32.20 31.80 0.81 Event native interface	2102	Event/Event 16000 516 31.16 31.84 0.82 Event native interface
1976	Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers	2103	Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers
1977	IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll	2104	IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll
1978	IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll	2105	IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll
1979	Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour	2106	Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour
1980	Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers	2107	Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers
1981	POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event	2108	POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event
1982	POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select	2109	POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select
1983		2110
1984	=head3 Discussion	2111	=head3 Discussion
1985		2112
1986	The benchmark does I<not> measure scalability of the event loop very	2113	The benchmark does I<not> measure scalability of the event loop very
1987	well. For example, a select-based event loop (such as the pure perl one)	2114	well. For example, a select-based event loop (such as the pure perl one)
…		…
1999	benchmark machine, handling an event takes roughly 1600 CPU cycles with	2126	benchmark machine, handling an event takes roughly 1600 CPU cycles with
2000	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU	2127	EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU
2001	cycles with POE.	2128	cycles with POE.
2002		2129
2003	C<EV> is the sole leader regarding speed and memory use, which are both	2130	C<EV> is the sole leader regarding speed and memory use, which are both
2004	maximal/minimal, respectively. Even when going through AnyEvent, it uses	2131	maximal/minimal, respectively. When using the L<AE> API there is zero
		2132	overhead (when going through the AnyEvent API create is about 5-6 times
		2133	slower, with other times being equal, so still uses far less memory than
2005	far less memory than any other event loop and is still faster than Event	2134	any other event loop and is still faster than Event natively).
2006	natively.
2007		2135
2008	The pure perl implementation is hit in a few sweet spots (both the	2136	The pure perl implementation is hit in a few sweet spots (both the
2009	constant timeout and the use of a single fd hit optimisations in the perl	2137	constant timeout and the use of a single fd hit optimisations in the perl
2010	interpreter and the backend itself). Nevertheless this shows that it	2138	interpreter and the backend itself). Nevertheless this shows that it
2011	adds very little overhead in itself. Like any select-based backend its	2139	adds very little overhead in itself. Like any select-based backend its
…		…
2085	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100	2213	In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100
2086	(1%) are active. This mirrors the activity of large servers with many	2214	(1%) are active. This mirrors the activity of large servers with many
2087	connections, most of which are idle at any one point in time.	2215	connections, most of which are idle at any one point in time.
2088		2216
2089	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent	2217	Source code for this benchmark is found as F<eg/bench2> in the AnyEvent
2090	distribution.	2218	distribution. It uses the L<AE> interface, which makes a real difference
		2219	for the EV and Perl backends only.
2091		2220
2092	=head3 Explanation of the columns	2221	=head3 Explanation of the columns
2093		2222
2094	I<sockets> is the number of sockets, and twice the number of "servers" (as	2223	I<sockets> is the number of sockets, and twice the number of "servers" (as
2095	each server has a read and write socket end).	2224	each server has a read and write socket end).
…		…
2103	a new one that moves the timeout into the future.	2232	a new one that moves the timeout into the future.
2104		2233
2105	=head3 Results	2234	=head3 Results
2106		2235
2107	name sockets create request	2236	name sockets create request
2108	EV 20000 69.01 11.16	2237	EV 20000 62.66 7.99
2109	Perl 20000 73.32 35.87	2238	Perl 20000 68.32 32.64
2110	IOAsync 20000 157.00 98.14 epoll	2239	IOAsync 20000 174.06 101.15 epoll
2111	IOAsync 20000 159.31 616.06 poll	2240	IOAsync 20000 174.67 610.84 poll
2112	Event 20000 212.62 257.32	2241	Event 20000 202.69 242.91
2113	Glib 20000 651.16 1896.30	2242	Glib 20000 557.01 1689.52
2114	POE 20000 349.67 12317.24 uses POE::Loop::Event	2243	POE 20000 341.54 12086.32 uses POE::Loop::Event
2115		2244
2116	=head3 Discussion	2245	=head3 Discussion
2117		2246
2118	This benchmark I<does> measure scalability and overall performance of the	2247	This benchmark I<does> measure scalability and overall performance of the
2119	particular event loop.	2248	particular event loop.

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.262 by root, Tue Jul 28 13:08:17 2009 UTC vs. Revision 1.279 by root, Sun Aug 9 16:05:11 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.262 by root, Tue Jul 28 13:08:17 2009 UTC vs.
Revision 1.279 by root, Sun Aug 9 16:05:11 2009 UTC