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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.252 by root, Tue Jul 21 03:30:02 2009 UTC vs.
Revision 1.269 by root, Fri Jul 31 20:16:29 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 = 4.9;
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 +($_ => 1),
1147	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1179	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1148		1180
…		…
1152	my ($cb) = @_;	1184	my ($cb) = @_;
1153		1185
1154	if ($MODEL) {	1186	if ($MODEL) {
1155	$cb->();	1187	$cb->();
1156		1188
1157	1	1189	undef
1158	} else {	1190	} else {
1159	push @post_detect, $cb;	1191	push @post_detect, $cb;
1160		1192
1161	defined wantarray	1193	defined wantarray
1162	? bless \$cb, "AnyEvent::Util::postdetect"	1194	? bless \$cb, "AnyEvent::Util::postdetect"
…		…
1194	}	1226	}
1195	}	1227	}
1196	}	1228	}
1197		1229
1198	unless ($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
…		…
1284	}	1318	}
1285		1319
1286	# default implementation for ->signal	1320	# default implementation for ->signal
1287		1321
1288	our $HAVE_ASYNC_INTERRUPT;	1322	our $HAVE_ASYNC_INTERRUPT;
		1323
		1324	sub _have_async_interrupt() {
		1325	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
		1326	&& eval "use Async::Interrupt 1.0 (); 1")
		1327	unless defined $HAVE_ASYNC_INTERRUPT;
		1328
		1329	$HAVE_ASYNC_INTERRUPT
		1330	}
		1331
1289	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1332	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1290	our (%SIG_ASY, %SIG_ASY_W);	1333	our (%SIG_ASY, %SIG_ASY_W);
1291	our ($SIG_COUNT, $SIG_TW);	1334	our ($SIG_COUNT, $SIG_TW);
1292		1335
1293	sub _signal_exec {	1336	sub _signal_exec {
…		…
1301	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1344	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1302	}	1345	}
1303	}	1346	}
1304	}	1347	}
1305		1348
1306	# install a dumym wakeupw atcher to reduce signal catching latency	1349	# install a dummy wakeup watcher to reduce signal catching latency
1307	sub _sig_add() {	1350	sub _sig_add() {
1308	unless ($SIG_COUNT++) {	1351	unless ($SIG_COUNT++) {
1309	# try to align timer on a full-second boundary, if possible	1352	# try to align timer on a full-second boundary, if possible
1310	my $NOW = AnyEvent->now;	1353	my $NOW = AnyEvent->now;
1311		1354
…		…
1320	sub _sig_del {	1363	sub _sig_del {
1321	undef $SIG_TW	1364	undef $SIG_TW
1322	unless --$SIG_COUNT;	1365	unless --$SIG_COUNT;
1323	}	1366	}
1324		1367
		1368	our $_sig_name_init; $_sig_name_init = sub {
		1369	eval q{ # poor man's autoloading
		1370	undef $_sig_name_init;
		1371
		1372	if (_have_async_interrupt) {
		1373	*sig2num = \&Async::Interrupt::sig2num;
		1374	*sig2name = \&Async::Interrupt::sig2name;
		1375	} else {
		1376	require Config;
		1377
		1378	my %signame2num;
		1379	@signame2num{ split ' ', $Config::Config{sig_name} }
		1380	= split ' ', $Config::Config{sig_num};
		1381
		1382	my @signum2name;
		1383	@signum2name[values %signame2num] = keys %signame2num;
		1384
		1385	*sig2num = sub($) {
		1386	$_[0] > 0 ? shift : $signame2num{+shift}
		1387	};
		1388	*sig2name = sub ($) {
		1389	$_[0] > 0 ? $signum2name[+shift] : shift
		1390	};
		1391	}
		1392	};
		1393	die if $@;
		1394	};
		1395
		1396	sub sig2num ($) { &$_sig_name_init; &sig2num }
		1397	sub sig2name($) { &$_sig_name_init; &sig2name }
		1398
1325	sub _signal {	1399	sub signal {
		1400	eval q{ # poor man's autoloading {}
		1401	# probe for availability of Async::Interrupt
		1402	if (_have_async_interrupt) {
		1403	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1404
		1405	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1406	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
		1407
		1408	} else {
		1409	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1410
		1411	require Fcntl;
		1412
		1413	if (AnyEvent::WIN32) {
		1414	require AnyEvent::Util;
		1415
		1416	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1417	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1418	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1419	} else {
		1420	pipe $SIGPIPE_R, $SIGPIPE_W;
		1421	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1422	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1423
		1424	# not strictly required, as $^F is normally 2, but let's make sure...
		1425	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1426	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1427	}
		1428
		1429	$SIGPIPE_R
		1430	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1431
		1432	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
		1433	}
		1434
		1435	*signal = sub {
1326	my (undef, %arg) = @_;	1436	my (undef, %arg) = @_;
1327		1437
1328	my $signal = uc $arg{signal}	1438	my $signal = uc $arg{signal}
1329	or Carp::croak "required option 'signal' is missing";	1439	or Carp::croak "required option 'signal' is missing";
1330		1440
1331	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1332
1333	if ($HAVE_ASYNC_INTERRUPT) {	1441	if ($HAVE_ASYNC_INTERRUPT) {
1334	# async::interrupt	1442	# async::interrupt
1335		1443
1336	$SIG_ASY{$signal} \|\|= do {	1444	$signal = sig2num $signal;
1337	my $asy = new Async::Interrupt	1445	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1446
		1447	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1338	cb => sub { undef $SIG_EV{$signal} },	1448	cb => sub { undef $SIG_EV{$signal} },
1339	signal => $signal,	1449	signal => $signal,
1340	pipe => [$SIGPIPE_R->filenos],	1450	pipe => [$SIGPIPE_R->filenos],
		1451	pipe_autodrain => 0,
		1452	;
		1453
		1454	} else {
		1455	# pure perl
		1456
		1457	# AE::Util has been loaded in signal
		1458	$signal = sig2name $signal;
		1459	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1460
		1461	$SIG{$signal} \|\|= sub {
		1462	local $!;
		1463	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
		1464	undef $SIG_EV{$signal};
		1465	};
		1466
		1467	# can't do signal processing without introducing races in pure perl,
		1468	# so limit the signal latency.
		1469	_sig_add;
1341	;	1470	}
1342	$asy->pipe_autodrain (0);
1343		1471
1344	$asy	1472	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1345	};	1473	};
1346		1474
1347	} else {	1475	*AnyEvent::Base::signal::DESTROY = sub {
1348	# pure perl	1476	my ($signal, $cb) = @{$_[0]};
1349		1477
1350	$SIG{$signal} \|\|= sub {	1478	_sig_del;
1351	local $!;	1479
1352	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1480	delete $SIG_CB{$signal}{$cb};
		1481
		1482	$HAVE_ASYNC_INTERRUPT
		1483	? delete $SIG_ASY{$signal}
		1484	: # delete doesn't work with older perls - they then
		1485	# print weird messages, or just unconditionally exit
		1486	# instead of getting the default action.
1353	undef $SIG_EV{$signal};	1487	undef $SIG{$signal}
		1488	unless keys %{ $SIG_CB{$signal} };
1354	};	1489	};
1355
1356	# can't do signal processing without introducing races in pure perl,
1357	# so limit the signal latency.
1358	_sig_add;
1359	}	1490	};
1360		1491	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 => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1398	}
1399
1400	*signal = \&_signal;
1401	&signal	1492	&signal
1402	}
1403
1404	sub AnyEvent::Base::signal::DESTROY {
1405	my ($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	}	1493	}
1419		1494
1420	# default implementation for ->child	1495	# default implementation for ->child
1421		1496
1422	our %PID_CB;	1497	our %PID_CB;
1423	our $CHLD_W;	1498	our $CHLD_W;
1424	our $CHLD_DELAY_W;	1499	our $CHLD_DELAY_W;
1425	our $WNOHANG;	1500	our $WNOHANG;
1426		1501
		1502	sub _emit_childstatus($$) {
		1503	my (undef, $rpid, $rstatus) = @_;
		1504
		1505	$_->($rpid, $rstatus)
		1506	for values %{ $PID_CB{$rpid} \|\| {} },
		1507	values %{ $PID_CB{0} \|\| {} };
		1508	}
		1509
1427	sub _sigchld {	1510	sub _sigchld {
		1511	my $pid;
		1512
		1513	AnyEvent->_emit_childstatus ($pid, $?)
1428	while (0 < (my $pid = waitpid -1, $WNOHANG)) {	1514	while ($pid = waitpid -1, $WNOHANG) > 0;
1429	$_->($pid, $?)
1430	for values %{ $PID_CB{$pid} \|\| {} },
1431	values %{ $PID_CB{0} \|\| {} };
1432	}
1433	}	1515	}
1434		1516
1435	sub child {	1517	sub child {
1436	my (undef, %arg) = @_;	1518	my (undef, %arg) = @_;
1437		1519
…		…
1552	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};	1634	Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak};
1553	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]	1635	wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0]
1554	}	1636	}
1555		1637
1556	sub cb {	1638	sub cb {
1557	$_[0]{_ae_cb} = $_[1] if @_ > 1;	1639	my $cv = shift;
		1640
		1641	@_
		1642	and $cv->{_ae_cb} = shift
		1643	and $cv->{_ae_sent}
		1644	and (delete $cv->{_ae_cb})->($cv);
1558	$_[0]{_ae_cb}	1645	$cv->{_ae_cb}
1559	}	1646	}
1560		1647
1561	sub begin {	1648	sub begin {
1562	++$_[0]{_ae_counter};	1649	++$_[0]{_ae_counter};
1563	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;	1650	$_[0]{_ae_end_cb} = $_[1] if @_ > 1;
…		…
1569	}	1656	}
1570		1657
1571	# undocumented/compatibility with pre-3.4	1658	# undocumented/compatibility with pre-3.4
1572	*broadcast = \&send;	1659	*broadcast = \&send;
1573	*wait = \&_wait;	1660	*wait = \&_wait;
		1661
		1662	#############################################################################
		1663	# "new" API, currently only emulation of it
		1664	#############################################################################
		1665
		1666	package AE;
		1667
		1668	sub io($$$) {
		1669	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1670	}
		1671
		1672	sub timer($$$) {
		1673	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]);
		1674	}
		1675
		1676	sub signal($$) {
		1677	AnyEvent->signal (signal => $_[0], cb => $_[1]);
		1678	}
		1679
		1680	sub child($$) {
		1681	AnyEvent->child (pid => $_[0], cb => $_[1]);
		1682	}
		1683
		1684	sub idle($) {
		1685	AnyEvent->idle (cb => $_[0]);
		1686	}
		1687
		1688	sub cv() {
		1689	AnyEvent->condvar
		1690	}
		1691
		1692	sub now() {
		1693	AnyEvent->now
		1694	}
		1695
		1696	sub now_update() {
		1697	AnyEvent->now_update
		1698	}
		1699
		1700	sub time() {
		1701	AnyEvent->time
		1702	}
1574		1703
1575	=head1 ERROR AND EXCEPTION HANDLING	1704	=head1 ERROR AND EXCEPTION HANDLING
1576		1705
1577	In general, AnyEvent does not do any error handling - it relies on the	1706	In general, AnyEvent does not do any error handling - it relies on the
1578	caller to do that if required. The L<AnyEvent::Strict> module (see also	1707	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
2416	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2545	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2417		2546
2418	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2547	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2419	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	2548	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2420	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2549	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2421	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>.	2550	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.
2422		2551
2423	Non-blocking file handles, sockets, TCP clients and	2552	Non-blocking file handles, sockets, TCP clients and
2424	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2553	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2425		2554
2426	Asynchronous DNS: L<AnyEvent::DNS>.	2555	Asynchronous DNS: L<AnyEvent::DNS>.

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.252 by root, Tue Jul 21 03:30:02 2009 UTC vs. Revision 1.269 by root, Fri Jul 31 20:16:29 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.252 by root, Tue Jul 21 03:30:02 2009 UTC vs.
Revision 1.269 by root, Fri Jul 31 20:16:29 2009 UTC