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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.249 by root, Mon Jul 20 06:00:42 2009 UTC vs.
Revision 1.266 by root, Thu Jul 30 03:41:56 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
…		…
354	Note that updating the time I<might> cause some events to be handled.	368	Note that updating the time I<might> cause some events to be handled.
355		369
356	=back	370	=back
357		371
358	=head2 SIGNAL WATCHERS	372	=head2 SIGNAL WATCHERS
		373
		374	$w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>);
359		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
…		…
398	currently, as POE does it's own workaround with one-second latency). With	414	currently, as POE does it's own workaround with one-second latency). With
399	those, you just have to suffer the delays.	415	those, you just have to suffer the delays.
400		416
401	=head2 CHILD PROCESS WATCHERS	417	=head2 CHILD PROCESS WATCHERS
402		418
		419	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
		420
403	You can also watch on a child process exit and catch its exit status.	421	You can also watch on a child process exit and catch its exit status.
404		422
405	The child process is specified by the C<pid> argument (if set to C<0>, it	423	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	424	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	425	croak). The watcher will be triggered only when the child process has
408	any trace events (stopped/continued).	426	finished and an exit status is available, not on any trace events
		427	(stopped/continued).
409		428
410	The callback will be called with the pid and exit status (as returned by	429	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	430	waitpid), so unlike other watcher types, you I<can> rely on child watcher
412	callback arguments.	431	callback arguments.
413		432
…		…
454	# do something else, then wait for process exit	473	# do something else, then wait for process exit
455	$done->recv;	474	$done->recv;
456		475
457	=head2 IDLE WATCHERS	476	=head2 IDLE WATCHERS
458		477
		478	$w = AnyEvent->idle (cb => <callback>);
		479
459	Sometimes there is a need to do something, but it is not so important	480	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	481	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	482	"nothing better to do" is usually defined to be "no other events need
462	attention by the event loop".	483	attention by the event loop".
463		484
…		…
489	});	510	});
490	});	511	});
491		512
492	=head2 CONDITION VARIABLES	513	=head2 CONDITION VARIABLES
493		514
		515	$cv = AnyEvent->condvar;
		516
		517	$cv->send (<list>);
		518	my @res = $cv->recv;
		519
494	If you are familiar with some event loops you will know that all of them	520	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	521	require you to run some blocking "loop", "run" or similar function that
496	will actively watch for new events and call your callbacks.	522	will actively watch for new events and call your callbacks.
497		523
498	AnyEvent is slightly different: it expects somebody else to run the event	524	AnyEvent is slightly different: it expects somebody else to run the event
…		…
517	Condition variables are similar to callbacks, except that you can	543	Condition variables are similar to callbacks, except that you can
518	optionally wait for them. They can also be called merge points - points	544	optionally wait for them. They can also be called merge points - points
519	in time where multiple outstanding events have been processed. And yet	545	in time where multiple outstanding events have been processed. And yet
520	another way to call them is transactions - each condition variable can be	546	another way to call them is transactions - each condition variable can be
521	used to represent a transaction, which finishes at some point and delivers	547	used to represent a transaction, which finishes at some point and delivers
522	a result.	548	a result. And yet some people know them as "futures" - a promise to
		549	compute/deliver something that you can wait for.
523		550
524	Condition variables are very useful to signal that something has finished,	551	Condition variables are very useful to signal that something has finished,
525	for example, if you write a module that does asynchronous http requests,	552	for example, if you write a module that does asynchronous http requests,
526	then a condition variable would be the ideal candidate to signal the	553	then a condition variable would be the ideal candidate to signal the
527	availability of results. The user can either act when the callback is	554	availability of results. The user can either act when the callback is
…		…
795		822
796	AnyEvent::Impl::Glib based on Glib, slow but very stable.	823	AnyEvent::Impl::Glib based on Glib, slow but very stable.
797	AnyEvent::Impl::Tk based on Tk, very broken.	824	AnyEvent::Impl::Tk based on Tk, very broken.
798	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	825	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
799	AnyEvent::Impl::POE based on POE, very slow, some limitations.	826	AnyEvent::Impl::POE based on POE, very slow, some limitations.
		827	AnyEvent::Impl::Irssi used when running within irssi.
800		828
801	=item Backends with special needs.	829	=item Backends with special needs.
802		830
803	Qt requires the Qt::Application to be instantiated first, but will	831	Qt requires the Qt::Application to be instantiated first, but will
804	otherwise be picked up automatically. As long as the main program	832	otherwise be picked up automatically. As long as the main program
…		…
878	event module detection too early, for example, L<AnyEvent::AIO> creates	906	event module detection too early, for example, L<AnyEvent::AIO> creates
879	and installs the global L<IO::AIO> watcher in a C<post_detect> block to	907	and installs the global L<IO::AIO> watcher in a C<post_detect> block to
880	avoid autodetecting the event module at load time.	908	avoid autodetecting the event module at load time.
881		909
882	If called in scalar or list context, then it creates and returns an object	910	If called in scalar or list context, then it creates and returns an object
883	that automatically removes the callback again when it is destroyed. See	911	that automatically removes the callback again when it is destroyed (or
		912	C<undef> when the hook was immediately executed). See L<AnyEvent::AIO> for
884	L<Coro::BDB> for a case where this is useful.	913	a case where this is useful.
		914
		915	Example: Create a watcher for the IO::AIO module and store it in
		916	C<$WATCHER>. Only do so after the event loop is initialised, though.
		917
		918	our WATCHER;
		919
		920	my $guard = AnyEvent::post_detect {
		921	$WATCHER = AnyEvent->io (fh => IO::AIO::poll_fileno, poll => 'r', cb => \&IO::AIO::poll_cb);
		922	};
		923
		924	# the \|\|= is important in case post_detect immediately runs the block,
		925	# as to not clobber the newly-created watcher. assigning both watcher and
		926	# post_detect guard to the same variable has the advantage of users being
		927	# able to just C<undef $WATCHER> if the watcher causes them grief.
		928
		929	$WATCHER \|\|= $guard;
885		930
886	=item @AnyEvent::post_detect	931	=item @AnyEvent::post_detect
887		932
888	If there are any code references in this array (you can C<push> to it	933	If there are any code references in this array (you can C<push> to it
889	before or after loading AnyEvent), then they will called directly after	934	before or after loading AnyEvent), then they will called directly after
…		…
1066		1111
1067	BEGIN { AnyEvent::common_sense }	1112	BEGIN { AnyEvent::common_sense }
1068		1113
1069	use Carp ();	1114	use Carp ();
1070		1115
1071	our $VERSION = 4.85;	1116	our $VERSION = 4.881;
1072	our $MODEL;	1117	our $MODEL;
1073		1118
1074	our $AUTOLOAD;	1119	our $AUTOLOAD;
1075	our @ISA;	1120	our @ISA;
1076		1121
…		…
1101	for reverse split /\s,\s/,	1146	for reverse split /\s,\s/,
1102	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1147	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1103	}	1148	}
1104		1149
1105	my @models = (	1150	my @models = (
1106	[EV:: => AnyEvent::Impl::EV::],	1151	[EV:: => AnyEvent::Impl::EV:: , 1],
1107	[Event:: => AnyEvent::Impl::Event::],	1152	[Event:: => AnyEvent::Impl::Event::, 1],
1108	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::],	1153	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],
1109	# everything below here will not be autoprobed	1154	# everything below here will not (normally) be autoprobed
1110	# as the pureperl backend should work everywhere	1155	# as the pureperl backend should work everywhere
1111	# and is usually faster	1156	# and is usually faster
1112	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers	1157	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1113	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy	1158	[Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
		1159	[Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1114	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1160	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1115	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1161	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1116	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1162	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1117	[Wx:: => AnyEvent::Impl::POE::],	1163	[Wx:: => AnyEvent::Impl::POE::],
1118	[Prima:: => AnyEvent::Impl::POE::],	1164	[Prima:: => AnyEvent::Impl::POE::],
1119	# IO::Async is just too broken - we would need workarounds for its	1165	# IO::Async is just too broken - we would need workarounds for its
1120	# byzantine signal and broken child handling, among others.	1166	# byzantine signal and broken child handling, among others.
1121	# IO::Async is rather hard to detect, as it doesn't have any	1167	# IO::Async is rather hard to detect, as it doesn't have any
1122	# obvious default class.	1168	# obvious default class.
1123	# [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program	1169	# [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1124	# [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program	1170	# [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1125	# [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program	1171	# [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
1126	);	1172	);
1127		1173
1128	our %method = map +($_ => 1),	1174	our %method = map +($_ => 1),
1129	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1175	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1130		1176
…		…
1134	my ($cb) = @_;	1180	my ($cb) = @_;
1135		1181
1136	if ($MODEL) {	1182	if ($MODEL) {
1137	$cb->();	1183	$cb->();
1138		1184
1139	1	1185	undef
1140	} else {	1186	} else {
1141	push @post_detect, $cb;	1187	push @post_detect, $cb;
1142		1188
1143	defined wantarray	1189	defined wantarray
1144	? bless \$cb, "AnyEvent::Util::postdetect"	1190	? bless \$cb, "AnyEvent::Util::postdetect"
…		…
1176	}	1222	}
1177	}	1223	}
1178	}	1224	}
1179		1225
1180	unless ($MODEL) {	1226	unless ($MODEL) {
1181	# try to load a model	1227	# try to autoload a model
1182
1183	for (@REGISTRY, @models) {	1228	for (@REGISTRY, @models) {
1184	my ($package, $model) = @$_;	1229	my ($package, $model, $autoload) = @$_;
		1230	if (
		1231	$autoload
1185	if (eval "require $package"	1232	and eval "require $package"
1186	and ${"$package\::VERSION"} > 0	1233	and ${"$package\::VERSION"} > 0
1187	and eval "require $model") {	1234	and eval "require $model"
		1235	) {
1188	$MODEL = $model;	1236	$MODEL = $model;
1189	warn "AnyEvent: autoprobed model '$model', using it.\n" if $VERBOSE >= 2;	1237	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1190	last;	1238	last;
1191	}	1239	}
1192	}	1240	}
1193		1241
1194	$MODEL	1242	$MODEL
…		…
1266	}	1314	}
1267		1315
1268	# default implementation for ->signal	1316	# default implementation for ->signal
1269		1317
1270	our $HAVE_ASYNC_INTERRUPT;	1318	our $HAVE_ASYNC_INTERRUPT;
		1319
		1320	sub _have_async_interrupt() {
		1321	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
		1322	&& eval "use Async::Interrupt 1.0 (); 1")
		1323	unless defined $HAVE_ASYNC_INTERRUPT;
		1324
		1325	$HAVE_ASYNC_INTERRUPT
		1326	}
		1327
1271	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1328	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1272	our (%SIG_ASY, %SIG_ASY_W);	1329	our (%SIG_ASY, %SIG_ASY_W);
1273	our ($SIG_COUNT, $SIG_TW);	1330	our ($SIG_COUNT, $SIG_TW);
1274		1331
1275	sub _signal_exec {	1332	sub _signal_exec {
…		…
1283	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1340	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1284	}	1341	}
1285	}	1342	}
1286	}	1343	}
1287		1344
1288	# install a dumym wakeupw atcher to reduce signal catching latency	1345	# install a dummy wakeup watcher to reduce signal catching latency
1289	sub _sig_add() {	1346	sub _sig_add() {
1290	unless ($SIG_COUNT++) {	1347	unless ($SIG_COUNT++) {
1291	# try to align timer on a full-second boundary, if possible	1348	# try to align timer on a full-second boundary, if possible
1292	my $NOW = AnyEvent->now;	1349	my $NOW = AnyEvent->now;
1293		1350
…		…
1302	sub _sig_del {	1359	sub _sig_del {
1303	undef $SIG_TW	1360	undef $SIG_TW
1304	unless --$SIG_COUNT;	1361	unless --$SIG_COUNT;
1305	}	1362	}
1306		1363
		1364	our $_sig_name_init; $_sig_name_init = sub {
		1365	eval q{ # poor man's autoloading
		1366	undef $_sig_name_init;
		1367
		1368	if (_have_async_interrupt) {
		1369	*sig2num = \&Async::Interrupt::sig2num;
		1370	*sig2name = \&Async::Interrupt::sig2name;
		1371	} else {
		1372	require Config;
		1373
		1374	my %signame2num;
		1375	@signame2num{ split ' ', $Config::Config{sig_name} }
		1376	= split ' ', $Config::Config{sig_num};
		1377
		1378	my @signum2name;
		1379	@signum2name[values %signame2num] = keys %signame2num;
		1380
		1381	*sig2num = sub($) {
		1382	$_[0] > 0 ? shift : $signame2num{+shift}
		1383	};
		1384	*sig2name = sub ($) {
		1385	$_[0] > 0 ? $signum2name[+shift] : shift
		1386	};
		1387	}
		1388	};
		1389	die if $@;
		1390	};
		1391
		1392	sub sig2num ($) { &$_sig_name_init; &sig2num }
		1393	sub sig2name($) { &$_sig_name_init; &sig2name }
		1394
1307	sub _signal {	1395	sub signal {
		1396	eval q{ # poor man's autoloading {}
		1397	# probe for availability of Async::Interrupt
		1398	if (_have_async_interrupt) {
		1399	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
		1400
		1401	$SIGPIPE_R = new Async::Interrupt::EventPipe;
		1402	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
		1403
		1404	} else {
		1405	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
		1406
		1407	require Fcntl;
		1408
		1409	if (AnyEvent::WIN32) {
		1410	require AnyEvent::Util;
		1411
		1412	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
		1413	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
		1414	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
		1415	} else {
		1416	pipe $SIGPIPE_R, $SIGPIPE_W;
		1417	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
		1418	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
		1419
		1420	# not strictly required, as $^F is normally 2, but let's make sure...
		1421	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1422	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
		1423	}
		1424
		1425	$SIGPIPE_R
		1426	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
		1427
		1428	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
		1429	}
		1430
		1431	*signal = sub {
1308	my (undef, %arg) = @_;	1432	my (undef, %arg) = @_;
1309		1433
1310	my $signal = uc $arg{signal}	1434	my $signal = uc $arg{signal}
1311	or Carp::croak "required option 'signal' is missing";	1435	or Carp::croak "required option 'signal' is missing";
1312		1436
1313	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1314
1315	if ($HAVE_ASYNC_INTERRUPT) {	1437	if ($HAVE_ASYNC_INTERRUPT) {
1316	# async::interrupt	1438	# async::interrupt
1317		1439
1318	$SIG_ASY{$signal} \|\|= do {	1440	$signal = sig2num $signal;
1319	my $asy = new Async::Interrupt	1441	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1442
		1443	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1320	cb => sub { undef $SIG_EV{$signal} },	1444	cb => sub { undef $SIG_EV{$signal} },
1321	signal => $signal,	1445	signal => $signal,
1322	pipe => [$SIGPIPE_R->filenos],	1446	pipe => [$SIGPIPE_R->filenos],
		1447	pipe_autodrain => 0,
		1448	;
		1449
		1450	} else {
		1451	# pure perl
		1452
		1453	# AE::Util has been loaded in signal
		1454	$signal = sig2name $signal;
		1455	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1456
		1457	$SIG{$signal} \|\|= sub {
		1458	local $!;
		1459	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
		1460	undef $SIG_EV{$signal};
		1461	};
		1462
		1463	# can't do signal processing without introducing races in pure perl,
		1464	# so limit the signal latency.
		1465	_sig_add;
1323	;	1466	}
1324	$asy->pipe_autodrain (0);
1325		1467
1326	$asy	1468	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1327	};	1469	};
1328		1470
1329	} else {	1471	*AnyEvent::Base::signal::DESTROY = sub {
1330	# pure perl	1472	my ($signal, $cb) = @{$_[0]};
1331		1473
1332	$SIG{$signal} \|\|= sub {	1474	_sig_del;
1333	local $!;	1475
1334	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1476	delete $SIG_CB{$signal}{$cb};
		1477
		1478	$HAVE_ASYNC_INTERRUPT
		1479	? delete $SIG_ASY{$signal}
		1480	: # delete doesn't work with older perls - they then
		1481	# print weird messages, or just unconditionally exit
		1482	# instead of getting the default action.
1335	undef $SIG_EV{$signal};	1483	undef $SIG{$signal}
		1484	unless keys %{ $SIG_CB{$signal} };
1336	};	1485	};
1337
1338	# can't do signal processing without introducing races in pure perl,
1339	# so limit the signal latency.
1340	_sig_add;
1341	}	1486	};
1342		1487	die if $@;
1343	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1344	}
1345
1346	sub signal {
1347	# probe for availability of Async::Interrupt
1348	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") {
1349	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1350
1351	$HAVE_ASYNC_INTERRUPT = 1;
1352	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1353	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
1354
1355	} else {
1356	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1357
1358	require Fcntl;
1359
1360	if (AnyEvent::WIN32) {
1361	require AnyEvent::Util;
1362
1363	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1364	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1365	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1366	} else {
1367	pipe $SIGPIPE_R, $SIGPIPE_W;
1368	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1369	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1370
1371	# not strictly required, as $^F is normally 2, but let's make sure...
1372	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1373	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1374	}
1375
1376	$SIGPIPE_R
1377	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1378
1379	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1380	}
1381
1382	*signal = \&_signal;
1383	&signal	1488	&signal
1384	}
1385
1386	sub AnyEvent::Base::signal::DESTROY {
1387	my ($signal, $cb) = @{$_[0]};
1388
1389	_sig_del;
1390
1391	delete $SIG_CB{$signal}{$cb};
1392
1393	$HAVE_ASYNC_INTERRUPT
1394	? delete $SIG_ASY{$signal}
1395	: # delete doesn't work with older perls - they then
1396	# print weird messages, or just unconditionally exit
1397	# instead of getting the default action.
1398	undef $SIG{$signal}
1399	unless keys %{ $SIG_CB{$signal} };
1400	}	1489	}
1401		1490
1402	# default implementation for ->child	1491	# default implementation for ->child
1403		1492
1404	our %PID_CB;	1493	our %PID_CB;
1405	our $CHLD_W;	1494	our $CHLD_W;
1406	our $CHLD_DELAY_W;	1495	our $CHLD_DELAY_W;
1407	our $WNOHANG;	1496	our $WNOHANG;
1408		1497
		1498	sub _emit_childstatus($$) {
		1499	my (undef, $rpid, $rstatus) = @_;
		1500
		1501	$_->($rpid, $rstatus)
		1502	for values %{ $PID_CB{$rpid} \|\| {} },
		1503	values %{ $PID_CB{0} \|\| {} };
		1504	}
		1505
1409	sub _sigchld {	1506	sub _sigchld {
		1507	my $pid;
		1508
		1509	AnyEvent->_emit_childstatus ($pid, $?)
1410	while (0 < (my $pid = waitpid -1, $WNOHANG)) {	1510	while ($pid = waitpid -1, $WNOHANG) > 0;
1411	$_->($pid, $?)
1412	for values %{ $PID_CB{$pid} \|\| {} },
1413	values %{ $PID_CB{0} \|\| {} };
1414	}
1415	}	1511	}
1416		1512
1417	sub child {	1513	sub child {
1418	my (undef, %arg) = @_;	1514	my (undef, %arg) = @_;
1419		1515
…		…
1551	}	1647	}
1552		1648
1553	# undocumented/compatibility with pre-3.4	1649	# undocumented/compatibility with pre-3.4
1554	*broadcast = \&send;	1650	*broadcast = \&send;
1555	*wait = \&_wait;	1651	*wait = \&_wait;
		1652
		1653	#############################################################################
		1654	# "new" API, currently only emulation of it
		1655	#############################################################################
		1656
		1657	package AE;
		1658
		1659	sub io($$$) {
		1660	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
		1661	}
		1662
		1663	sub timer($$$) {
		1664	AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]);
		1665	}
		1666
		1667	sub signal($$) {
		1668	AnyEvent->signal (signal => $_[0], cb => $_[1]);
		1669	}
		1670
		1671	sub child($$) {
		1672	AnyEvent->child (pid => $_[0], cb => $_[1]);
		1673	}
		1674
		1675	sub idle($) {
		1676	AnyEvent->idle (cb => $_[0]);
		1677	}
		1678
		1679	sub cv() {
		1680	AnyEvent->condvar
		1681	}
		1682
		1683	sub now() {
		1684	AnyEvent->now
		1685	}
		1686
		1687	sub now_update() {
		1688	AnyEvent->now_update
		1689	}
		1690
		1691	sub time() {
		1692	AnyEvent->time
		1693	}
1556		1694
1557	=head1 ERROR AND EXCEPTION HANDLING	1695	=head1 ERROR AND EXCEPTION HANDLING
1558		1696
1559	In general, AnyEvent does not do any error handling - it relies on the	1697	In general, AnyEvent does not do any error handling - it relies on the
1560	caller to do that if required. The L<AnyEvent::Strict> module (see also	1698	caller to do that if required. The L<AnyEvent::Strict> module (see also
…		…
2398	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2536	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2399		2537
2400	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2538	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2401	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,	2539	L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2402	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2540	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2403	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>.	2541	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.
2404		2542
2405	Non-blocking file handles, sockets, TCP clients and	2543	Non-blocking file handles, sockets, TCP clients and
2406	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2544	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2407		2545
2408	Asynchronous DNS: L<AnyEvent::DNS>.	2546	Asynchronous DNS: L<AnyEvent::DNS>.

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.249 by root, Mon Jul 20 06:00:42 2009 UTC vs. Revision 1.266 by root, Thu Jul 30 03:41:56 2009 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.249 by root, Mon Jul 20 06:00:42 2009 UTC vs.
Revision 1.266 by root, Thu Jul 30 03:41:56 2009 UTC