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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.255 by root, Fri Jul 24 23:45:54 2009 UTC vs.
Revision 1.277 by root, Sun Aug 9 13:27:23 2009 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	AnyEvent - events independent of event loop implementation	3	AnyEvent - the DBI of event loop programming
4		4
5	EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, IO::Async, Qt and POE are	5	EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt
6	various supported event loops/environments.	6	and POE are various supported event loops/environments.
7		7
8	=head1 SYNOPSIS	8	=head1 SYNOPSIS
9		9
10	use AnyEvent;	10	use AnyEvent;
11		11
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 = 4.86;	1120	our $VERSION = 4.92;
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	#############################################################################
		1294	# "new" API, currently only emulation of it
		1295	#############################################################################
		1296
		1297	package AE;
		1298
		1299	our $VERSION = $AnyEvent::VERSION;
		1300
		1301	sub io($$$) {
		1302	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1303	}
		1304
		1305	sub timer($$$) {
		1306	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
		1307	}
		1308
		1309	sub signal($$) {
		1310	AnyEvent->signal (signal => $_[0], cb => $_[1])
		1311	}
		1312
		1313	sub child($$) {
		1314	AnyEvent->child (pid => $_[0], cb => $_[1])
		1315	}
		1316
		1317	sub idle($) {
		1318	AnyEvent->idle (cb => $_[0])
		1319	}
		1320
		1321	sub cv(;&) {
		1322	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
		1323	}
		1324
		1325	sub now() {
		1326	AnyEvent->now
		1327	}
		1328
		1329	sub now_update() {
		1330	AnyEvent->now_update
		1331	}
		1332
		1333	sub time() {
		1334	AnyEvent->time
		1335	}
		1336
1263	package AnyEvent::Base;	1337	package AnyEvent::Base;
1264		1338
1265	# default implementations for many methods	1339	# default implementations for many methods
1266		1340
1267	sub _time {	1341	sub _time {
…		…
1289	}	1363	}
1290		1364
1291	# default implementation for ->signal	1365	# default implementation for ->signal
1292		1366
1293	our $HAVE_ASYNC_INTERRUPT;	1367	our $HAVE_ASYNC_INTERRUPT;
		1368
		1369	sub _have_async_interrupt() {
		1370	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
		1371	&& eval "use Async::Interrupt 1.0 (); 1")
		1372	unless defined $HAVE_ASYNC_INTERRUPT;
		1373
		1374	$HAVE_ASYNC_INTERRUPT
		1375	}
		1376
1294	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1377	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1295	our (%SIG_ASY, %SIG_ASY_W);	1378	our (%SIG_ASY, %SIG_ASY_W);
1296	our ($SIG_COUNT, $SIG_TW);	1379	our ($SIG_COUNT, $SIG_TW);
1297		1380
1298	sub _signal_exec {	1381	sub _signal_exec {
…		…
1306	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1389	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1307	}	1390	}
1308	}	1391	}
1309	}	1392	}
1310		1393
1311	# install a dumym wakeupw atcher to reduce signal catching latency	1394	# install a dummy wakeup watcher to reduce signal catching latency
1312	sub _sig_add() {	1395	sub _sig_add() {
1313	unless ($SIG_COUNT++) {	1396	unless ($SIG_COUNT++) {
1314	# try to align timer on a full-second boundary, if possible	1397	# try to align timer on a full-second boundary, if possible
1315	my $NOW = AnyEvent->now;	1398	my $NOW = AE::now;
1316		1399
1317	$SIG_TW = AnyEvent->timer (	1400	$SIG_TW = AE::timer
1318	after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW),	1401	$MAX_SIGNAL_LATENCY - ($NOW - int $NOW),
1319	interval => $MAX_SIGNAL_LATENCY,	1402	$MAX_SIGNAL_LATENCY,
1320	cb => sub { }, # just for the PERL_ASYNC_CHECK	1403	sub { } # just for the PERL_ASYNC_CHECK
1321	);	1404	;
1322	}	1405	}
1323	}	1406	}
1324		1407
1325	sub _sig_del {	1408	sub _sig_del {
1326	undef $SIG_TW	1409	undef $SIG_TW
1327	unless --$SIG_COUNT;	1410	unless --$SIG_COUNT;
1328	}	1411	}
1329		1412
		1413	our $_sig_name_init; $_sig_name_init = sub {
		1414	eval q{ # poor man's autoloading
		1415	undef $_sig_name_init;
		1416
		1417	if (_have_async_interrupt) {
		1418	*sig2num = \&Async::Interrupt::sig2num;
		1419	*sig2name = \&Async::Interrupt::sig2name;
		1420	} else {
		1421	require Config;
		1422
		1423	my %signame2num;
		1424	@signame2num{ split ' ', $Config::Config{sig_name} }
		1425	= split ' ', $Config::Config{sig_num};
		1426
		1427	my @signum2name;
		1428	@signum2name[values %signame2num] = keys %signame2num;
		1429
		1430	*sig2num = sub($) {
		1431	$_[0] > 0 ? shift : $signame2num{+shift}
		1432	};
		1433	*sig2name = sub ($) {
		1434	$_[0] > 0 ? $signum2name[+shift] : shift
		1435	};
		1436	}
		1437	};
		1438	die if $@;
		1439	};
		1440
		1441	sub sig2num ($) { &$_sig_name_init; &sig2num }
		1442	sub sig2name($) { &$_sig_name_init; &sig2name }
		1443
1330	sub _signal {	1444	sub signal {
		1445	eval q{ # poor man's autoloading {}
		1446	# probe for availability of Async::Interrupt
		1447	if (_have_async_interrupt) {
		1448	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1449
		1450	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1451	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
		1452
		1453	} else {
		1454	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1455
		1456	require Fcntl;
		1457
		1458	if (AnyEvent::WIN32) {
		1459	require AnyEvent::Util;
		1460
		1461	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1462	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1463	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1464	} else {
		1465	pipe $SIGPIPE_R, $SIGPIPE_W;
		1466	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1467	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1468
		1469	# not strictly required, as $^F is normally 2, but let's make sure...
		1470	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1471	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1472	}
		1473
		1474	$SIGPIPE_R
		1475	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1476
		1477	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;
		1478	}
		1479
		1480	*signal = sub {
1331	my (undef, %arg) = @_;	1481	my (undef, %arg) = @_;
1332		1482
1333	my $signal = uc $arg{signal}	1483	my $signal = uc $arg{signal}
1334	or Carp::croak "required option 'signal' is missing";	1484	or Carp::croak "required option 'signal' is missing";
1335		1485
1336	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1337
1338	if ($HAVE_ASYNC_INTERRUPT) {	1486	if ($HAVE_ASYNC_INTERRUPT) {
1339	# async::interrupt	1487	# async::interrupt
1340		1488
1341	$SIG_ASY{$signal} \|\|= do {	1489	$signal = sig2num $signal;
1342	my $asy = new Async::Interrupt	1490	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1491
		1492	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1343	cb => sub { undef $SIG_EV{$signal} },	1493	cb => sub { undef $SIG_EV{$signal} },
1344	signal => $signal,	1494	signal => $signal,
1345	pipe => [$SIGPIPE_R->filenos],	1495	pipe => [$SIGPIPE_R->filenos],
		1496	pipe_autodrain => 0,
		1497	;
		1498
		1499	} else {
		1500	# pure perl
		1501
		1502	# AE::Util has been loaded in signal
		1503	$signal = sig2name $signal;
		1504	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1505
		1506	$SIG{$signal} \|\|= sub {
		1507	local $!;
		1508	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
		1509	undef $SIG_EV{$signal};
		1510	};
		1511
		1512	# can't do signal processing without introducing races in pure perl,
		1513	# so limit the signal latency.
		1514	_sig_add;
1346	;	1515	}
1347	$asy->pipe_autodrain (0);
1348		1516
1349	$asy	1517	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1350	};	1518	};
1351		1519
1352	} else {	1520	*AnyEvent::Base::signal::DESTROY = sub {
1353	# pure perl	1521	my ($signal, $cb) = @{$_[0]};
1354		1522
1355	$SIG{$signal} \|\|= sub {	1523	_sig_del;
1356	local $!;	1524
1357	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1525	delete $SIG_CB{$signal}{$cb};
		1526
		1527	$HAVE_ASYNC_INTERRUPT
		1528	? delete $SIG_ASY{$signal}
		1529	: # delete doesn't work with older perls - they then
		1530	# print weird messages, or just unconditionally exit
		1531	# instead of getting the default action.
1358	undef $SIG_EV{$signal};	1532	undef $SIG{$signal}
		1533	unless keys %{ $SIG_CB{$signal} };
1359	};	1534	};
1360
1361	# can't do signal processing without introducing races in pure perl,
1362	# so limit the signal latency.
1363	_sig_add;
1364	}	1535	};
1365		1536	die if $@;
1366	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1367	}
1368
1369	sub signal {
1370	# probe for availability of Async::Interrupt
1371	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") {
1372	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1373
1374	$HAVE_ASYNC_INTERRUPT = 1;
1375	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1376	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
1377
1378	} else {
1379	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1380
1381	require Fcntl;
1382
1383	if (AnyEvent::WIN32) {
1384	require AnyEvent::Util;
1385
1386	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1387	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1388	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1389	} else {
1390	pipe $SIGPIPE_R, $SIGPIPE_W;
1391	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1392	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1393
1394	# not strictly required, as $^F is normally 2, but let's make sure...
1395	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1396	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1397	}
1398
1399	$SIGPIPE_R
1400	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1401
1402	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1403	}
1404
1405	*signal = \&_signal;
1406	&signal	1537	&signal
1407	}
1408
1409	sub AnyEvent::Base::signal::DESTROY {
1410	my ($signal, $cb) = @{$_[0]};
1411
1412	_sig_del;
1413
1414	delete $SIG_CB{$signal}{$cb};
1415
1416	$HAVE_ASYNC_INTERRUPT
1417	? delete $SIG_ASY{$signal}
1418	: # delete doesn't work with older perls - they then
1419	# print weird messages, or just unconditionally exit
1420	# instead of getting the default action.
1421	undef $SIG{$signal}
1422	unless keys %{ $SIG_CB{$signal} };
1423	}	1538	}
1424		1539
1425	# default implementation for ->child	1540	# default implementation for ->child
1426		1541
1427	our %PID_CB;	1542	our %PID_CB;
…		…
1456	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1571	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1457	? 1	1572	? 1
1458	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1573	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1459		1574
1460	unless ($CHLD_W) {	1575	unless ($CHLD_W) {
1461	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);	1576	$CHLD_W = AE::signal CHLD => \&_sigchld;
1462	# child could be a zombie already, so make at least one round	1577	# child could be a zombie already, so make at least one round
1463	&_sigchld;	1578	&_sigchld;
1464	}	1579	}
1465		1580
1466	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1581	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
…		…
1492	# never use more then 50% of the time for the idle watcher,	1607	# never use more then 50% of the time for the idle watcher,
1493	# within some limits	1608	# within some limits
1494	$w = 0.0001 if $w < 0.0001;	1609	$w = 0.0001 if $w < 0.0001;
1495	$w = 5 if $w > 5;	1610	$w = 5 if $w > 5;
1496		1611
1497	$w = AnyEvent->timer (after => $w, cb => $rcb);	1612	$w = AE::timer $w, 0, $rcb;
1498	} else {	1613	} else {
1499	# clean up...	1614	# clean up...
1500	undef $w;	1615	undef $w;
1501	undef $rcb;	1616	undef $rcb;
1502	}	1617	}
1503	};	1618	};
1504		1619
1505	$w = AnyEvent->timer (after => 0.05, cb => $rcb);	1620	$w = AE::timer 0.05, 0, $rcb;
1506		1621
1507	bless \\$cb, "AnyEvent::Base::idle"	1622	bless \\$cb, "AnyEvent::Base::idle"
1508	}	1623	}
1509		1624
1510	sub AnyEvent::Base::idle::DESTROY {	1625	sub AnyEvent::Base::idle::DESTROY {
…		…
1564	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1679	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};
1565	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1680	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]
1566	}	1681	}
1567		1682
1568	sub cb {	1683	sub cb {
1569	$_[0]{_ae_cb} = $_[1] if @_ > 1;	1684	my $cv = shift;
		1685
		1686	@_
		1687	and $cv->{_ae_cb} = shift
		1688	and $cv->{_ae_sent}
		1689	and (delete $cv->{_ae_cb})->($cv);
		1690
1570	$_[0]{_ae_cb}	1691	$cv->{_ae_cb}
1571	}	1692	}
1572		1693
1573	sub begin {	1694	sub begin {
1574	++$_[0]{_ae_counter};	1695	++$_[0]{_ae_counter};
1575	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;	1696	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.255 by root, Fri Jul 24 23:45:54 2009 UTC vs. Revision 1.277 by root, Sun Aug 9 13:27:23 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.255 by root, Fri Jul 24 23:45:54 2009 UTC vs.
Revision 1.277 by root, Sun Aug 9 13:27:23 2009 UTC