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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.253 by root, Tue Jul 21 06:00:47 2009 UTC vs.
Revision 1.274 by root, Sun Aug 9 00:20:35 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, Qt and POE are various supported	5	EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt
6	event loops.	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
47		47
48	There is a mailinglist for discussing all things AnyEvent, and an IRC	48	There is a mailinglist for discussing all things AnyEvent, and an IRC
49	channel, too.	49	channel, too.
50		50
51	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software	51	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software
52	Respository>, at L<http://anyevent.schmorp.de>, for more info.	52	Repository>, at L<http://anyevent.schmorp.de>, for more info.
53		53
54	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)	54	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)
55		55
56	Glib, POE, IO::Async, Event... CPAN offers event models by the dozen	56	Glib, POE, IO::Async, Event... CPAN offers event models by the dozen
57	nowadays. So what is different about AnyEvent?	57	nowadays. So what is different about AnyEvent?
…		…
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
402		422
		423	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
		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 (if set to C<0>, it	427	The child process is specified by the C<pid> argument (one some backends,
406	watches for any child process exit). The watcher will triggered only when	428	using C<0> watches for any child process exit, on others this will
407	the child process has finished and an exit status is available, not on	429	croak). The watcher will be triggered only when the child process has
408	any trace events (stopped/continued).	430	finished and an exit status is available, not on any trace events
		431	(stopped/continued).
409		432
410	The callback will be called with the pid and exit status (as returned by	433	The callback will be called with the pid and exit status (as returned by
411	waitpid), so unlike other watcher types, you I<can> rely on child watcher	434	waitpid), so unlike other watcher types, you I<can> rely on child watcher
412	callback arguments.	435	callback arguments.
413		436
…		…
454	# do something else, then wait for process exit	477	# do something else, then wait for process exit
455	$done->recv;	478	$done->recv;
456		479
457	=head2 IDLE WATCHERS	480	=head2 IDLE WATCHERS
458		481
		482	$w = AnyEvent->idle (cb => <callback>);
		483
459	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
460	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
461	"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
462	attention by the event loop".	487	attention by the event loop".
463		488
…		…
489	});	514	});
490	});	515	});
491		516
492	=head2 CONDITION VARIABLES	517	=head2 CONDITION VARIABLES
493		518
		519	$cv = AnyEvent->condvar;
		520
		521	$cv->send (<list>);
		522	my @res = $cv->recv;
		523
494	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
495	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
496	will actively watch for new events and call your callbacks.	526	will actively watch for new events and call your callbacks.
497		527
498	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
…		…
760	=item $cb = $cv->cb ($cb->($cv))	790	=item $cb = $cv->cb ($cb->($cv))
761		791
762	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
763	replaces it before doing so.	793	replaces it before doing so.
764		794
765	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)
766	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
767	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>
768	is guaranteed not to block.	798	inside the callback or at any later time is guaranteed not to block.
769		799
770	=back	800	=back
771		801
772	=head1 SUPPORTED EVENT LOOPS/BACKENDS	802	=head1 SUPPORTED EVENT LOOPS/BACKENDS
773		803
…		…
796		826
797	AnyEvent::Impl::Glib based on Glib, slow but very stable.	827	AnyEvent::Impl::Glib based on Glib, slow but very stable.
798	AnyEvent::Impl::Tk based on Tk, very broken.	828	AnyEvent::Impl::Tk based on Tk, very broken.
799	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	829	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
800	AnyEvent::Impl::POE based on POE, very slow, some limitations.	830	AnyEvent::Impl::POE based on POE, very slow, some limitations.
		831	AnyEvent::Impl::Irssi used when running within irssi.
801		832
802	=item Backends with special needs.	833	=item Backends with special needs.
803		834
804	Qt requires the Qt::Application to be instantiated first, but will	835	Qt requires the Qt::Application to be instantiated first, but will
805	otherwise be picked up automatically. As long as the main program	836	otherwise be picked up automatically. As long as the main program
…		…
1084		1115
1085	BEGIN { AnyEvent::common_sense }	1116	BEGIN { AnyEvent::common_sense }
1086		1117
1087	use Carp ();	1118	use Carp ();
1088		1119
1089	our $VERSION = 4.86;	1120	our $VERSION = 4.92;
1090	our $MODEL;	1121	our $MODEL;
1091		1122
1092	our $AUTOLOAD;	1123	our $AUTOLOAD;
1093	our @ISA;	1124	our @ISA;
1094		1125
…		…
1119	for reverse split /\s,\s/,	1150	for reverse split /\s,\s/,
1120	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1151	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1121	}	1152	}
1122		1153
1123	my @models = (	1154	my @models = (
1124	[EV:: => AnyEvent::Impl::EV::],	1155	[EV:: => AnyEvent::Impl::EV:: , 1],
1125	[Event:: => AnyEvent::Impl::Event::],	1156	[Event:: => AnyEvent::Impl::Event::, 1],
1126	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::],	1157	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],
1127	# everything below here will not be autoprobed	1158	# everything below here will not (normally) be autoprobed
1128	# as the pureperl backend should work everywhere	1159	# as the pureperl backend should work everywhere
1129	# and is usually faster	1160	# and is usually faster
1130	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers	1161	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1131	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1162	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
		1163	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1132	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1164	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1133	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1165	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1134	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1166	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1135	[Wx:: => AnyEvent::Impl::POE::],	1167	[Wx:: => AnyEvent::Impl::POE::],
1136	[Prima:: => AnyEvent::Impl::POE::],	1168	[Prima:: => AnyEvent::Impl::POE::],
1137	# 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
1138	# byzantine signal and broken child handling, among others.	1170	# byzantine signal and broken child handling, among others.
1139	# 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
1140	# obvious default class.	1172	# obvious default class.
1141	# [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program	1173	# [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1142	# [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program	1174	# [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1143	# [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program	1175	# [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
1144	);	1176	);
1145		1177
1146	our %method = map +($_ => 1),	1178	our %method = map +($_ => 1),
1147	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1179	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1148		1180
…		…
1194	}	1226	}
1195	}	1227	}
1196	}	1228	}
1197		1229
1198	unless ($MODEL) {	1230	unless ($MODEL) {
1199	# try to load a model	1231	# try to autoload a model
1200
1201	for (@REGISTRY, @models) {	1232	for (@REGISTRY, @models) {
1202	my ($package, $model) = @$_;	1233	my ($package, $model, $autoload) = @$_;
		1234	if (
		1235	$autoload
1203	if (eval "require $package"	1236	and eval "require $package"
1204	and ${"$package\::VERSION"} > 0	1237	and ${"$package\::VERSION"} > 0
1205	and eval "require $model") {	1238	and eval "require $model"
		1239	) {
1206	$MODEL = $model;	1240	$MODEL = $model;
1207	warn "AnyEvent: autoprobed model '$model', using it.\n" if $VERBOSE >= 2;	1241	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1208	last;	1242	last;
1209	}	1243	}
1210	}	1244	}
1211		1245
1212	$MODEL	1246	$MODEL
…		…
1251	or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,";	1285	or die "AnyEvent->io: cannot dup() filehandle in mode '$poll': $!,";
1252		1286
1253	# we assume CLOEXEC is already set by perl in all important cases	1287	# we assume CLOEXEC is already set by perl in all important cases
1254		1288
1255	($fh2, $rw)	1289	($fh2, $rw)
		1290	}
		1291
		1292	#############################################################################
		1293	# "new" API, currently only emulation of it
		1294	#############################################################################
		1295
		1296	package AE;
		1297
		1298	sub io($$$) {
		1299	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1300	}
		1301
		1302	sub timer($$$) {
		1303	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]);
		1304	}
		1305
		1306	sub signal($$) {
		1307	AnyEvent->signal (signal => $_[0], cb => $_[1]);
		1308	}
		1309
		1310	sub child($$) {
		1311	AnyEvent->child (pid => $_[0], cb => $_[1]);
		1312	}
		1313
		1314	sub idle($) {
		1315	AnyEvent->idle (cb => $_[0]);
		1316	}
		1317
		1318	sub cv(;&) {
		1319	AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
		1320	}
		1321
		1322	sub now() {
		1323	AnyEvent->now
		1324	}
		1325
		1326	sub now_update() {
		1327	AnyEvent->now_update
		1328	}
		1329
		1330	sub time() {
		1331	AnyEvent->time
1256	}	1332	}
1257		1333
1258	package AnyEvent::Base;	1334	package AnyEvent::Base;
1259		1335
1260	# default implementations for many methods	1336	# default implementations for many methods
…		…
1284	}	1360	}
1285		1361
1286	# default implementation for ->signal	1362	# default implementation for ->signal
1287		1363
1288	our $HAVE_ASYNC_INTERRUPT;	1364	our $HAVE_ASYNC_INTERRUPT;
		1365
		1366	sub _have_async_interrupt() {
		1367	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
		1368	&& eval "use Async::Interrupt 1.0 (); 1")
		1369	unless defined $HAVE_ASYNC_INTERRUPT;
		1370
		1371	$HAVE_ASYNC_INTERRUPT
		1372	}
		1373
1289	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1374	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1290	our (%SIG_ASY, %SIG_ASY_W);	1375	our (%SIG_ASY, %SIG_ASY_W);
1291	our ($SIG_COUNT, $SIG_TW);	1376	our ($SIG_COUNT, $SIG_TW);
1292		1377
1293	sub _signal_exec {	1378	sub _signal_exec {
…		…
1301	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1386	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1302	}	1387	}
1303	}	1388	}
1304	}	1389	}
1305		1390
1306	# install a dumym wakeupw atcher to reduce signal catching latency	1391	# install a dummy wakeup watcher to reduce signal catching latency
1307	sub _sig_add() {	1392	sub _sig_add() {
1308	unless ($SIG_COUNT++) {	1393	unless ($SIG_COUNT++) {
1309	# try to align timer on a full-second boundary, if possible	1394	# try to align timer on a full-second boundary, if possible
1310	my $NOW = AnyEvent->now;	1395	my $NOW = AE::now;
1311		1396
1312	$SIG_TW = AnyEvent->timer (	1397	$SIG_TW = AE::timer
1313	after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW),	1398	$MAX_SIGNAL_LATENCY - ($NOW - int $NOW),
1314	interval => $MAX_SIGNAL_LATENCY,	1399	$MAX_SIGNAL_LATENCY,
1315	cb => sub { }, # just for the PERL_ASYNC_CHECK	1400	sub { } # just for the PERL_ASYNC_CHECK
1316	);	1401	;
1317	}	1402	}
1318	}	1403	}
1319		1404
1320	sub _sig_del {	1405	sub _sig_del {
1321	undef $SIG_TW	1406	undef $SIG_TW
1322	unless --$SIG_COUNT;	1407	unless --$SIG_COUNT;
1323	}	1408	}
1324		1409
		1410	our $_sig_name_init; $_sig_name_init = sub {
		1411	eval q{ # poor man's autoloading
		1412	undef $_sig_name_init;
		1413
		1414	if (_have_async_interrupt) {
		1415	*sig2num = \&Async::Interrupt::sig2num;
		1416	*sig2name = \&Async::Interrupt::sig2name;
		1417	} else {
		1418	require Config;
		1419
		1420	my %signame2num;
		1421	@signame2num{ split ' ', $Config::Config{sig_name} }
		1422	= split ' ', $Config::Config{sig_num};
		1423
		1424	my @signum2name;
		1425	@signum2name[values %signame2num] = keys %signame2num;
		1426
		1427	*sig2num = sub($) {
		1428	$_[0] > 0 ? shift : $signame2num{+shift}
		1429	};
		1430	*sig2name = sub ($) {
		1431	$_[0] > 0 ? $signum2name[+shift] : shift
		1432	};
		1433	}
		1434	};
		1435	die if $@;
		1436	};
		1437
		1438	sub sig2num ($) { &$_sig_name_init; &sig2num }
		1439	sub sig2name($) { &$_sig_name_init; &sig2name }
		1440
1325	sub _signal {	1441	sub signal {
		1442	eval q{ # poor man's autoloading {}
		1443	# probe for availability of Async::Interrupt
		1444	if (_have_async_interrupt) {
		1445	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1446
		1447	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1448	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
		1449
		1450	} else {
		1451	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1452
		1453	require Fcntl;
		1454
		1455	if (AnyEvent::WIN32) {
		1456	require AnyEvent::Util;
		1457
		1458	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1459	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1460	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1461	} else {
		1462	pipe $SIGPIPE_R, $SIGPIPE_W;
		1463	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1464	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1465
		1466	# not strictly required, as $^F is normally 2, but let's make sure...
		1467	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1468	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1469	}
		1470
		1471	$SIGPIPE_R
		1472	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1473
		1474	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;
		1475	}
		1476
		1477	*signal = sub {
1326	my (undef, %arg) = @_;	1478	my (undef, %arg) = @_;
1327		1479
1328	my $signal = uc $arg{signal}	1480	my $signal = uc $arg{signal}
1329	or Carp::croak "required option 'signal' is missing";	1481	or Carp::croak "required option 'signal' is missing";
1330		1482
1331	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1332
1333	if ($HAVE_ASYNC_INTERRUPT) {	1483	if ($HAVE_ASYNC_INTERRUPT) {
1334	# async::interrupt	1484	# async::interrupt
1335		1485
1336	$SIG_ASY{$signal} \|\|= do {	1486	$signal = sig2num $signal;
1337	my $asy = new Async::Interrupt	1487	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1488
		1489	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1338	cb => sub { undef $SIG_EV{$signal} },	1490	cb => sub { undef $SIG_EV{$signal} },
1339	signal => $signal,	1491	signal => $signal,
1340	pipe => [$SIGPIPE_R->filenos],	1492	pipe => [$SIGPIPE_R->filenos],
		1493	pipe_autodrain => 0,
		1494	;
		1495
		1496	} else {
		1497	# pure perl
		1498
		1499	# AE::Util has been loaded in signal
		1500	$signal = sig2name $signal;
		1501	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1502
		1503	$SIG{$signal} \|\|= sub {
		1504	local $!;
		1505	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
		1506	undef $SIG_EV{$signal};
		1507	};
		1508
		1509	# can't do signal processing without introducing races in pure perl,
		1510	# so limit the signal latency.
		1511	_sig_add;
1341	;	1512	}
1342	$asy->pipe_autodrain (0);
1343		1513
1344	$asy	1514	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1345	};	1515	};
1346		1516
1347	} else {	1517	*AnyEvent::Base::signal::DESTROY = sub {
1348	# pure perl	1518	my ($signal, $cb) = @{$_[0]};
1349		1519
1350	$SIG{$signal} \|\|= sub {	1520	_sig_del;
1351	local $!;	1521
1352	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1522	delete $SIG_CB{$signal}{$cb};
		1523
		1524	$HAVE_ASYNC_INTERRUPT
		1525	? delete $SIG_ASY{$signal}
		1526	: # delete doesn't work with older perls - they then
		1527	# print weird messages, or just unconditionally exit
		1528	# instead of getting the default action.
1353	undef $SIG_EV{$signal};	1529	undef $SIG{$signal}
		1530	unless keys %{ $SIG_CB{$signal} };
1354	};	1531	};
1355
1356	# can't do signal processing without introducing races in pure perl,
1357	# so limit the signal latency.
1358	_sig_add;
1359	}	1532	};
1360		1533	die if $@;
1361	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1362	}
1363
1364	sub signal {
1365	# probe for availability of Async::Interrupt
1366	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") {
1367	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1368
1369	$HAVE_ASYNC_INTERRUPT = 1;
1370	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1371	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
1372
1373	} else {
1374	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1375
1376	require Fcntl;
1377
1378	if (AnyEvent::WIN32) {
1379	require AnyEvent::Util;
1380
1381	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1382	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1383	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1384	} else {
1385	pipe $SIGPIPE_R, $SIGPIPE_W;
1386	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1387	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1388
1389	# not strictly required, as $^F is normally 2, but let's make sure...
1390	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1391	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1392	}
1393
1394	$SIGPIPE_R
1395	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1396
1397	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1398	}
1399
1400	*signal = \&_signal;
1401	&signal	1534	&signal
1402	}
1403
1404	sub AnyEvent::Base::signal::DESTROY {
1405	my ($signal, $cb) = @{$_[0]};
1406
1407	_sig_del;
1408
1409	delete $SIG_CB{$signal}{$cb};
1410
1411	$HAVE_ASYNC_INTERRUPT
1412	? delete $SIG_ASY{$signal}
1413	: # delete doesn't work with older perls - they then
1414	# print weird messages, or just unconditionally exit
1415	# instead of getting the default action.
1416	undef $SIG{$signal}
1417	unless keys %{ $SIG_CB{$signal} };
1418	}	1535	}
1419		1536
1420	# default implementation for ->child	1537	# default implementation for ->child
1421		1538
1422	our %PID_CB;	1539	our %PID_CB;
1423	our $CHLD_W;	1540	our $CHLD_W;
1424	our $CHLD_DELAY_W;	1541	our $CHLD_DELAY_W;
1425	our $WNOHANG;	1542	our $WNOHANG;
1426		1543
		1544	sub _emit_childstatus($$) {
		1545	my (undef, $rpid, $rstatus) = @_;
		1546
		1547	$_->($rpid, $rstatus)
		1548	for values %{ $PID_CB{$rpid} \|\| {} },
		1549	values %{ $PID_CB{0} \|\| {} };
		1550	}
		1551
1427	sub _sigchld {	1552	sub _sigchld {
		1553	my $pid;
		1554
		1555	AnyEvent->_emit_childstatus ($pid, $?)
1428	while (0 < (my $pid = waitpid -1, $WNOHANG)) {	1556	while ($pid = waitpid -1, $WNOHANG) > 0;
1429	$_->($pid, $?)
1430	for values %{ $PID_CB{$pid} \|\| {} },
1431	values %{ $PID_CB{0} \|\| {} };
1432	}
1433	}	1557	}
1434		1558
1435	sub child {	1559	sub child {
1436	my (undef, %arg) = @_;	1560	my (undef, %arg) = @_;
1437		1561
…		…
1444	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1568	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1445	? 1	1569	? 1
1446	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1570	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1447		1571
1448	unless ($CHLD_W) {	1572	unless ($CHLD_W) {
1449	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);	1573	$CHLD_W = AE::signal CHLD => \&_sigchld;
1450	# child could be a zombie already, so make at least one round	1574	# child could be a zombie already, so make at least one round
1451	&_sigchld;	1575	&_sigchld;
1452	}	1576	}
1453		1577
1454	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1578	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
…		…
1480	# never use more then 50% of the time for the idle watcher,	1604	# never use more then 50% of the time for the idle watcher,
1481	# within some limits	1605	# within some limits
1482	$w = 0.0001 if $w < 0.0001;	1606	$w = 0.0001 if $w < 0.0001;
1483	$w = 5 if $w > 5;	1607	$w = 5 if $w > 5;
1484		1608
1485	$w = AnyEvent->timer (after => $w, cb => $rcb);	1609	$w = AE::timer $w, 0, $rcb;
1486	} else {	1610	} else {
1487	# clean up...	1611	# clean up...
1488	undef $w;	1612	undef $w;
1489	undef $rcb;	1613	undef $rcb;
1490	}	1614	}
1491	};	1615	};
1492		1616
1493	$w = AnyEvent->timer (after => 0.05, cb => $rcb);	1617	$w = AE::timer 0.05, 0, $rcb;
1494		1618
1495	bless \\$cb, "AnyEvent::Base::idle"	1619	bless \\$cb, "AnyEvent::Base::idle"
1496	}	1620	}
1497		1621
1498	sub AnyEvent::Base::idle::DESTROY {	1622	sub AnyEvent::Base::idle::DESTROY {
…		…
1552	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1676	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};
1553	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1677	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]
1554	}	1678	}
1555		1679
1556	sub cb {	1680	sub cb {
1557	$_[0]{_ae_cb} = $_[1] if @_ > 1;	1681	my $cv = shift;
		1682
		1683	@_
		1684	and $cv->{_ae_cb} = shift
		1685	and $cv->{_ae_sent}
		1686	and (delete $cv->{_ae_cb})->($cv);
		1687
1558	$_[0]{_ae_cb}	1688	$cv->{_ae_cb}
1559	}	1689	}
1560		1690
1561	sub begin {	1691	sub begin {
1562	++$_[0]{_ae_counter};	1692	++$_[0]{_ae_counter};
1563	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;	1693	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;
…		…
2416	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2546	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2417		2547
2418	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2548	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2419	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	2549	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2420	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2550	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2421	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>.	2551	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.
2422		2552
2423	Non-blocking file handles, sockets, TCP clients and	2553	Non-blocking file handles, sockets, TCP clients and
2424	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2554	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2425		2555
2426	Asynchronous DNS: L<AnyEvent::DNS>.	2556	Asynchronous DNS: L<AnyEvent::DNS>.

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.253 by root, Tue Jul 21 06:00:47 2009 UTC vs. Revision 1.274 by root, Sun Aug 9 00:20:35 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.253 by root, Tue Jul 21 06:00:47 2009 UTC vs.
Revision 1.274 by root, Sun Aug 9 00:20:35 2009 UTC