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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.247 by root, Sat Jul 18 22:24:17 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 - provide framework for multiple event loops	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
40	=head1 INTRODUCTION/TUTORIAL	40	=head1 INTRODUCTION/TUTORIAL
41		41
42	This manpage is mainly a reference manual. If you are interested	42	This manpage is mainly a reference manual. If you are interested
43	in a tutorial or some gentle introduction, have a look at the	43	in a tutorial or some gentle introduction, have a look at the
44	L<AnyEvent::Intro> manpage.	44	L<AnyEvent::Intro> manpage.
		45
		46	=head1 SUPPORT
		47
		48	There is a mailinglist for discussing all things AnyEvent, and an IRC
		49	channel, too.
		50
		51	See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software
		52	Repository>, at L<http://anyevent.schmorp.de>, for more info.
45		53
46	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)	54	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)
47		55
48	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
49	nowadays. So what is different about AnyEvent?	57	nowadays. So what is different about AnyEvent?
…		…
173	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
174	declared.	182	declared.
175		183
176	=head2 I/O WATCHERS	184	=head2 I/O WATCHERS
177		185
		186	$w = AnyEvent->io (
		187	fh => <filehandle_or_fileno>,
		188	poll => <"r" or "w">,
		189	cb => <callback>,
		190	);
		191
178	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
179	with the following mandatory key-value pairs as arguments:	193	with the following mandatory key-value pairs as arguments:
180		194
181	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
182	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
…		…
211	undef $w;	225	undef $w;
212	});	226	});
213		227
214	=head2 TIME WATCHERS	228	=head2 TIME WATCHERS
215		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
216	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 >>
217	method with the following mandatory arguments:	239	method with the following mandatory arguments:
218		240
219	C<after> specifies after how many seconds (fractional values are	241	C<after> specifies after how many seconds (fractional values are
220	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
…		…
346	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.
347		369
348	=back	370	=back
349		371
350	=head2 SIGNAL WATCHERS	372	=head2 SIGNAL WATCHERS
		373
		374	$w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>);
351		375
352	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
353	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
354	callback to be invoked whenever a signal occurs.	378	callback to be invoked whenever a signal occurs.
355		379
…		…
390	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
391	those, you just have to suffer the delays.	415	those, you just have to suffer the delays.
392		416
393	=head2 CHILD PROCESS WATCHERS	417	=head2 CHILD PROCESS WATCHERS
394		418
		419	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
		420
395	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.
396		422
397	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,
398	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
399	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
400	any trace events (stopped/continued).	426	finished and an exit status is available, not on any trace events
		427	(stopped/continued).
401		428
402	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
403	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
404	callback arguments.	431	callback arguments.
405		432
…		…
446	# do something else, then wait for process exit	473	# do something else, then wait for process exit
447	$done->recv;	474	$done->recv;
448		475
449	=head2 IDLE WATCHERS	476	=head2 IDLE WATCHERS
450		477
		478	$w = AnyEvent->idle (cb => <callback>);
		479
451	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
452	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
453	"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
454	attention by the event loop".	483	attention by the event loop".
455		484
…		…
481	});	510	});
482	});	511	});
483		512
484	=head2 CONDITION VARIABLES	513	=head2 CONDITION VARIABLES
485		514
		515	$cv = AnyEvent->condvar;
		516
		517	$cv->send (<list>);
		518	my @res = $cv->recv;
		519
486	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
487	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
488	will actively watch for new events and call your callbacks.	522	will actively watch for new events and call your callbacks.
489		523
490	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
…		…
509	Condition variables are similar to callbacks, except that you can	543	Condition variables are similar to callbacks, except that you can
510	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
511	in time where multiple outstanding events have been processed. And yet	545	in time where multiple outstanding events have been processed. And yet
512	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
513	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
514	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.
515		550
516	Condition variables are very useful to signal that something has finished,	551	Condition variables are very useful to signal that something has finished,
517	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,
518	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
519	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
…		…
787		822
788	AnyEvent::Impl::Glib based on Glib, slow but very stable.	823	AnyEvent::Impl::Glib based on Glib, slow but very stable.
789	AnyEvent::Impl::Tk based on Tk, very broken.	824	AnyEvent::Impl::Tk based on Tk, very broken.
790	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.	825	AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
791	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.
792		828
793	=item Backends with special needs.	829	=item Backends with special needs.
794		830
795	Qt requires the Qt::Application to be instantiated first, but will	831	Qt requires the Qt::Application to be instantiated first, but will
796	otherwise be picked up automatically. As long as the main program	832	otherwise be picked up automatically. As long as the main program
…		…
870	event module detection too early, for example, L<AnyEvent::AIO> creates	906	event module detection too early, for example, L<AnyEvent::AIO> creates
871	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
872	avoid autodetecting the event module at load time.	908	avoid autodetecting the event module at load time.
873		909
874	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
875	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
876	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;
877		930
878	=item @AnyEvent::post_detect	931	=item @AnyEvent::post_detect
879		932
880	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
881	before or after loading AnyEvent), then they will called directly after	934	before or after loading AnyEvent), then they will called directly after
…		…
1058		1111
1059	BEGIN { AnyEvent::common_sense }	1112	BEGIN { AnyEvent::common_sense }
1060		1113
1061	use Carp ();	1114	use Carp ();
1062		1115
1063	our $VERSION = 4.85;	1116	our $VERSION = 4.881;
1064	our $MODEL;	1117	our $MODEL;
1065		1118
1066	our $AUTOLOAD;	1119	our $AUTOLOAD;
1067	our @ISA;	1120	our @ISA;
1068		1121
…		…
1093	for reverse split /\s,\s/,	1146	for reverse split /\s,\s/,
1094	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	1147	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
1095	}	1148	}
1096		1149
1097	my @models = (	1150	my @models = (
1098	[EV:: => AnyEvent::Impl::EV::],	1151	[EV:: => AnyEvent::Impl::EV:: , 1],
1099	[Event:: => AnyEvent::Impl::Event::],	1152	[Event:: => AnyEvent::Impl::Event::, 1],
1100	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::],	1153	[AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1],
1101	# everything below here will not be autoprobed	1154	# everything below here will not (normally) be autoprobed
1102	# as the pureperl backend should work everywhere	1155	# as the pureperl backend should work everywhere
1103	# and is usually faster	1156	# and is usually faster
1104	[Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers	1157	[Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1105	[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
1106	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles	1160	[Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1107	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program	1161	[Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1108	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	1162	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1109	[Wx:: => AnyEvent::Impl::POE::],	1163	[Wx:: => AnyEvent::Impl::POE::],
1110	[Prima:: => AnyEvent::Impl::POE::],	1164	[Prima:: => AnyEvent::Impl::POE::],
1111	# 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
1112	# byzantine signal and broken child handling, among others.	1166	# byzantine signal and broken child handling, among others.
1113	# 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
1114	# obvious default class.	1168	# obvious default class.
1115	# [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program	1169	# [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1116	# [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program	1170	# [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program
1117	# [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program	1171	# [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program
1118	);	1172	);
1119		1173
1120	our %method = map +($_ => 1),	1174	our %method = map +($_ => 1),
1121	qw(io timer time now now_update signal child idle condvar one_event DESTROY);	1175	qw(io timer time now now_update signal child idle condvar one_event DESTROY);
1122		1176
…		…
1126	my ($cb) = @_;	1180	my ($cb) = @_;
1127		1181
1128	if ($MODEL) {	1182	if ($MODEL) {
1129	$cb->();	1183	$cb->();
1130		1184
1131	1	1185	undef
1132	} else {	1186	} else {
1133	push @post_detect, $cb;	1187	push @post_detect, $cb;
1134		1188
1135	defined wantarray	1189	defined wantarray
1136	? bless \$cb, "AnyEvent::Util::postdetect"	1190	? bless \$cb, "AnyEvent::Util::postdetect"
…		…
1168	}	1222	}
1169	}	1223	}
1170	}	1224	}
1171		1225
1172	unless ($MODEL) {	1226	unless ($MODEL) {
1173	# try to load a model	1227	# try to autoload a model
1174
1175	for (@REGISTRY, @models) {	1228	for (@REGISTRY, @models) {
1176	my ($package, $model) = @$_;	1229	my ($package, $model, $autoload) = @$_;
		1230	if (
		1231	$autoload
1177	if (eval "require $package"	1232	and eval "require $package"
1178	and ${"$package\::VERSION"} > 0	1233	and ${"$package\::VERSION"} > 0
1179	and eval "require $model") {	1234	and eval "require $model"
		1235	) {
1180	$MODEL = $model;	1236	$MODEL = $model;
1181	warn "AnyEvent: autoprobed model '$model', using it.\n" if $VERBOSE >= 2;	1237	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1182	last;	1238	last;
1183	}	1239	}
1184	}	1240	}
1185		1241
1186	$MODEL	1242	$MODEL
…		…
1258	}	1314	}
1259		1315
1260	# default implementation for ->signal	1316	# default implementation for ->signal
1261		1317
1262	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	$HAVE_ASYNC_INTERRUPT
		1326	}
		1327
1263	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1328	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1264	our (%SIG_ASY, %SIG_ASY_W);	1329	our (%SIG_ASY, %SIG_ASY_W);
1265	our ($SIG_COUNT, $SIG_TW);	1330	our ($SIG_COUNT, $SIG_TW);
1266		1331
1267	sub _signal_exec {	1332	sub _signal_exec {
…		…
1275	$_->() for values %{ $SIG_CB{$_} \|\| {} };	1340	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1276	}	1341	}
1277	}	1342	}
1278	}	1343	}
1279		1344
1280	# install a dumym wakeupw atcher to reduce signal catching latency	1345	# install a dummy wakeup watcher to reduce signal catching latency
1281	sub _sig_add() {	1346	sub _sig_add() {
1282	unless ($SIG_COUNT++) {	1347	unless ($SIG_COUNT++) {
1283	# try to align timer on a full-second boundary, if possible	1348	# try to align timer on a full-second boundary, if possible
1284	my $NOW = AnyEvent->now;	1349	my $NOW = AnyEvent->now;
1285		1350
…		…
1294	sub _sig_del {	1359	sub _sig_del {
1295	undef $SIG_TW	1360	undef $SIG_TW
1296	unless --$SIG_COUNT;	1361	unless --$SIG_COUNT;
1297	}	1362	}
1298		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
1299	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 {
1300	my (undef, %arg) = @_;	1432	my (undef, %arg) = @_;
1301		1433
1302	my $signal = uc $arg{signal}	1434	my $signal = uc $arg{signal}
1303	or Carp::croak "required option 'signal' is missing";	1435	or Carp::croak "required option 'signal' is missing";
1304		1436
1305	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1306
1307	if ($HAVE_ASYNC_INTERRUPT) {	1437	if ($HAVE_ASYNC_INTERRUPT) {
1308	# async::interrupt	1438	# async::interrupt
1309		1439
1310	$SIG_ASY{$signal} \|\|= do {	1440	$signal = sig2num $signal;
1311	my $asy = new Async::Interrupt	1441	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
		1442
		1443	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1312	cb => sub { undef $SIG_EV{$signal} },	1444	cb => sub { undef $SIG_EV{$signal} },
1313	signal => $signal,	1445	signal => $signal,
1314	pipe => [$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;
1315	;	1466	}
1316	$asy->pipe_autodrain (0);
1317		1467
1318	$asy	1468	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1319	};	1469	};
1320		1470
1321	} else {	1471	*AnyEvent::Base::signal::DESTROY = sub {
1322	# pure perl	1472	my ($signal, $cb) = @{$_[0]};
1323		1473
1324	$SIG{$signal} \|\|= sub {	1474	_sig_del;
1325	local $!;	1475
1326	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.
1327	undef $SIG_EV{$signal};	1483	undef $SIG{$signal}
		1484	unless keys %{ $SIG_CB{$signal} };
1328	};	1485	};
1329
1330	# can't do signal processing without introducing races in pure perl,
1331	# so limit the signal latency.
1332	_sig_add;
1333	}	1486	};
1334		1487	die if $@;
1335	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1336	}
1337
1338	sub signal {
1339	# probe for availability of Async::Interrupt
1340	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") {
1341	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1342
1343	$HAVE_ASYNC_INTERRUPT = 1;
1344	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1345	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
1346
1347	} else {
1348	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1349
1350	require Fcntl;
1351
1352	if (AnyEvent::WIN32) {
1353	require AnyEvent::Util;
1354
1355	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1356	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1357	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1358	} else {
1359	pipe $SIGPIPE_R, $SIGPIPE_W;
1360	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1361	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1362
1363	# not strictly required, as $^F is normally 2, but let's make sure...
1364	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1365	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1366	}
1367
1368	$SIGPIPE_R
1369	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1370
1371	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1372	}
1373
1374	*signal = \&_signal;
1375	&signal	1488	&signal
1376	}
1377
1378	sub AnyEvent::Base::signal::DESTROY {
1379	my ($signal, $cb) = @{$_[0]};
1380
1381	_sig_del;
1382
1383	delete $SIG_CB{$signal}{$cb};
1384
1385	$HAVE_ASYNC_INTERRUPT
1386	? delete $SIG_ASY{$signal}
1387	: # delete doesn't work with older perls - they then
1388	# print weird messages, or just unconditionally exit
1389	# instead of getting the default action.
1390	undef $SIG{$signal}
1391	unless keys %{ $SIG_CB{$signal} };
1392	}	1489	}
1393		1490
1394	# default implementation for ->child	1491	# default implementation for ->child
1395		1492
1396	our %PID_CB;	1493	our %PID_CB;
1397	our $CHLD_W;	1494	our $CHLD_W;
1398	our $CHLD_DELAY_W;	1495	our $CHLD_DELAY_W;
1399	our $WNOHANG;	1496	our $WNOHANG;
1400		1497
		1498	sub _emit_childstatus($$) {
		1499	my (undef, $rpid, $rstatus) = @_;
		1500
		1501	$_->($rpid, $rstatus)
		1502	for values %{ $PID_CB{$rpid} \|\| {} },
		1503	values %{ $PID_CB{0} \|\| {} };
		1504	}
		1505
1401	sub _sigchld {	1506	sub _sigchld {
		1507	my $pid;
		1508
		1509	AnyEvent->_emit_childstatus ($pid, $?)
1402	while (0 < (my $pid = waitpid -1, $WNOHANG)) {	1510	while ($pid = waitpid -1, $WNOHANG) > 0;
1403	$_->($pid, $?)
1404	for values %{ $PID_CB{$pid} \|\| {} },
1405	values %{ $PID_CB{0} \|\| {} };
1406	}
1407	}	1511	}
1408		1512
1409	sub child {	1513	sub child {
1410	my (undef, %arg) = @_;	1514	my (undef, %arg) = @_;
1411		1515
…		…
1543	}	1647	}
1544		1648
1545	# undocumented/compatibility with pre-3.4	1649	# undocumented/compatibility with pre-3.4
1546	*broadcast = \&send;	1650	*broadcast = \&send;
1547	*wait = \&_wait;	1651	*wait = \&_wait;
		1652
		1653	#############################################################################
		1654	# "new" API, currently only emulation of it
		1655	#############################################################################
		1656
		1657	package AE;
		1658
		1659	sub io($$$) {
		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	}
1548		1694
1549	=head1 ERROR AND EXCEPTION HANDLING	1695	=head1 ERROR AND EXCEPTION HANDLING
1550		1696
1551	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
1552	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
…		…
2313		2459
2314	=item L<JSON> and L<JSON::XS>	2460	=item L<JSON> and L<JSON::XS>
2315		2461
2316	This module is required when you want to read or write JSON data via	2462	This module is required when you want to read or write JSON data via
2317	L<AnyEvent::Handle>. It is also written in pure-perl, but can take	2463	L<AnyEvent::Handle>. It is also written in pure-perl, but can take
2318	advantage of the ulta-high-speed L<JSON::XS> module when it is installed.	2464	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.
2319		2465
2320	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is	2466	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is
2321	installed.	2467	installed.
2322		2468
2323	=item L<Net::SSLeay>	2469	=item L<Net::SSLeay>
…		…
2390	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.	2536	L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2391		2537
2392	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,	2538	Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2393	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>,
2394	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,	2540	L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2395	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>.	2541	L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.
2396		2542
2397	Non-blocking file handles, sockets, TCP clients and	2543	Non-blocking file handles, sockets, TCP clients and
2398	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.	2544	servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2399		2545
2400	Asynchronous DNS: L<AnyEvent::DNS>.	2546	Asynchronous DNS: L<AnyEvent::DNS>.

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.247 by root, Sat Jul 18 22:24:17 2009 UTC vs. Revision 1.266 by root, Thu Jul 30 03:41:56 2009 UTC

Diff Legend

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.247 by root, Sat Jul 18 22:24:17 2009 UTC vs.
Revision 1.266 by root, Thu Jul 30 03:41:56 2009 UTC