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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.279 by root, Sun Aug 9 16:05:11 2009 UTC vs.
Revision 1.322 by root, Sat May 8 07:51:39 2010 UTC

…		…
7		7
8	=head1 SYNOPSIS	8	=head1 SYNOPSIS
9		9
10	use AnyEvent;	10	use AnyEvent;
11		11
		12	# if you prefer function calls, look at the AE manpage for
		13	# an alternative API.
		14
12	# file descriptor readable	15	# file handle or descriptor readable
13	my $w = AnyEvent->io (fh => $fh, poll => "r", cb => sub { ... });	16	my $w = AnyEvent->io (fh => $fh, poll => "r", cb => sub { ... });
14		17
15	# one-shot or repeating timers	18	# one-shot or repeating timers
16	my $w = AnyEvent->timer (after => $seconds, cb => sub { ... });	19	my $w = AnyEvent->timer (after => $seconds, cb => sub { ... });
17	my $w = AnyEvent->timer (after => $seconds, interval => $seconds, cb => ...	20	my $w = AnyEvent->timer (after => $seconds, interval => $seconds, cb => ...
…		…
363	might affect timers and time-outs.	366	might affect timers and time-outs.
364		367
365	When this is the case, you can call this method, which will update the	368	When this is the case, you can call this method, which will update the
366	event loop's idea of "current time".	369	event loop's idea of "current time".
367		370
		371	A typical example would be a script in a web server (e.g. C<mod_perl>) -
		372	when mod_perl executes the script, then the event loop will have the wrong
		373	idea about the "current time" (being potentially far in the past, when the
		374	script ran the last time). In that case you should arrange a call to C<<
		375	AnyEvent->now_update >> each time the web server process wakes up again
		376	(e.g. at the start of your script, or in a handler).
		377
368	Note that updating the time I<might> cause some events to be handled.	378	Note that updating the time I<might> cause some events to be handled.
369		379
370	=back	380	=back
371		381
372	=head2 SIGNAL WATCHERS	382	=head2 SIGNAL WATCHERS
…		…
395	correctly.	405	correctly.
396		406
397	Example: exit on SIGINT	407	Example: exit on SIGINT
398		408
399	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });	409	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
		410
		411	=head3 Restart Behaviour
		412
		413	While restart behaviour is up to the event loop implementation, most will
		414	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's
		415	pure perl implementation).
		416
		417	=head3 Safe/Unsafe Signals
		418
		419	Perl signals can be either "safe" (synchronous to opcode handling) or
		420	"unsafe" (asynchronous) - the former might get delayed indefinitely, the
		421	latter might corrupt your memory.
		422
		423	AnyEvent signal handlers are, in addition, synchronous to the event loop,
		424	i.e. they will not interrupt your running perl program but will only be
		425	called as part of the normal event handling (just like timer, I/O etc.
		426	callbacks, too).
400		427
401	=head3 Signal Races, Delays and Workarounds	428	=head3 Signal Races, Delays and Workarounds
402		429
403	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching	430	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching
404	callbacks to signals in a generic way, which is a pity, as you cannot	431	callbacks to signals in a generic way, which is a pity, as you cannot
…		…
479		506
480	=head2 IDLE WATCHERS	507	=head2 IDLE WATCHERS
481		508
482	$w = AnyEvent->idle (cb => <callback>);	509	$w = AnyEvent->idle (cb => <callback>);
483		510
484	Sometimes there is a need to do something, but it is not so important	511	Repeatedly invoke the callback after the process becomes idle, until
485	to do it instantly, but only when there is nothing better to do. This	512	either the watcher is destroyed or new events have been detected.
486	"nothing better to do" is usually defined to be "no other events need
487	attention by the event loop".
488		513
489	Idle watchers ideally get invoked when the event loop has nothing	514	Idle watchers are useful when there is a need to do something, but it
490	better to do, just before it would block the process to wait for new	515	is not so important (or wise) to do it instantly. The callback will be
491	events. Instead of blocking, the idle watcher is invoked.	516	invoked only when there is "nothing better to do", which is usually
		517	defined as "all outstanding events have been handled and no new events
		518	have been detected". That means that idle watchers ideally get invoked
		519	when the event loop has just polled for new events but none have been
		520	detected. Instead of blocking to wait for more events, the idle watchers
		521	will be invoked.
492		522
493	Most event loops unfortunately do not really support idle watchers (only	523	Unfortunately, most event loops do not really support idle watchers (only
494	EV, Event and Glib do it in a usable fashion) - for the rest, AnyEvent	524	EV, Event and Glib do it in a usable fashion) - for the rest, AnyEvent
495	will simply call the callback "from time to time".	525	will simply call the callback "from time to time".
496		526
497	Example: read lines from STDIN, but only process them when the	527	Example: read lines from STDIN, but only process them when the
498	program is otherwise idle:	528	program is otherwise idle:
…		…
579	eventually calls C<< -> send >>, and the "consumer side", which waits	609	eventually calls C<< -> send >>, and the "consumer side", which waits
580	for the send to occur.	610	for the send to occur.
581		611
582	Example: wait for a timer.	612	Example: wait for a timer.
583		613
584	# wait till the result is ready	614	# condition: "wait till the timer is fired"
585	my $result_ready = AnyEvent->condvar;	615	my $timer_fired = AnyEvent->condvar;
586		616
587	# do something such as adding a timer	617	# create the timer - we could wait for, say
588	# or socket watcher the calls $result_ready->send	618	# a handle becomign ready, or even an
589	# when the "result" is ready.	619	# AnyEvent::HTTP request to finish, but
590	# in this case, we simply use a timer:	620	# in this case, we simply use a timer:
591	my $w = AnyEvent->timer (	621	my $w = AnyEvent->timer (
592	after => 1,	622	after => 1,
593	cb => sub { $result_ready->send },	623	cb => sub { $timer_fired->send },
594	);	624	);
595		625
596	# this "blocks" (while handling events) till the callback	626	# this "blocks" (while handling events) till the callback
597	# calls -<send	627	# calls ->send
598	$result_ready->recv;	628	$timer_fired->recv;
599		629
600	Example: wait for a timer, but take advantage of the fact that condition	630	Example: wait for a timer, but take advantage of the fact that condition
601	variables are also callable directly.	631	variables are also callable directly.
602		632
603	my $done = AnyEvent->condvar;	633	my $done = AnyEvent->condvar;
…		…
666	one. For example, a function that pings many hosts in parallel might want	696	one. For example, a function that pings many hosts in parallel might want
667	to use a condition variable for the whole process.	697	to use a condition variable for the whole process.
668		698
669	Every call to C<< ->begin >> will increment a counter, and every call to	699	Every call to C<< ->begin >> will increment a counter, and every call to
670	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end	700	C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end
671	>>, the (last) callback passed to C<begin> will be executed. That callback	701	>>, the (last) callback passed to C<begin> will be executed, passing the
672	is I<supposed> to call C<< ->send >>, but that is not required. If no	702	condvar as first argument. That callback is I<supposed> to call C<< ->send
673	callback was set, C<send> will be called without any arguments.	703	>>, but that is not required. If no group callback was set, C<send> will
		704	be called without any arguments.
674		705
675	You can think of C<< $cv->send >> giving you an OR condition (one call	706	You can think of C<< $cv->send >> giving you an OR condition (one call
676	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND	707	sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND
677	condition (all C<begin> calls must be C<end>'ed before the condvar sends).	708	condition (all C<begin> calls must be C<end>'ed before the condvar sends).
678		709
…		…
705	begung can potentially be zero:	736	begung can potentially be zero:
706		737
707	my $cv = AnyEvent->condvar;	738	my $cv = AnyEvent->condvar;
708		739
709	my %result;	740	my %result;
710	$cv->begin (sub { $cv->send (\%result) });	741	$cv->begin (sub { shift->send (\%result) });
711		742
712	for my $host (@list_of_hosts) {	743	for my $host (@list_of_hosts) {
713	$cv->begin;	744	$cv->begin;
714	ping_host_then_call_callback $host, sub {	745	ping_host_then_call_callback $host, sub {
715	$result{$host} = ...;	746	$result{$host} = ...;
…		…
941	You should check C<$AnyEvent::MODEL> before adding to this array, though:	972	You should check C<$AnyEvent::MODEL> before adding to this array, though:
942	if it is defined then the event loop has already been detected, and the	973	if it is defined then the event loop has already been detected, and the
943	array will be ignored.	974	array will be ignored.
944		975
945	Best use C<AnyEvent::post_detect { BLOCK }> when your application allows	976	Best use C<AnyEvent::post_detect { BLOCK }> when your application allows
946	it,as it takes care of these details.	977	it, as it takes care of these details.
947		978
948	This variable is mainly useful for modules that can do something useful	979	This variable is mainly useful for modules that can do something useful
949	when AnyEvent is used and thus want to know when it is initialised, but do	980	when AnyEvent is used and thus want to know when it is initialised, but do
950	not need to even load it by default. This array provides the means to hook	981	not need to even load it by default. This array provides the means to hook
951	into AnyEvent passively, without loading it.	982	into AnyEvent passively, without loading it.
		983
		984	Example: To load Coro::AnyEvent whenever Coro and AnyEvent are used
		985	together, you could put this into Coro (this is the actual code used by
		986	Coro to accomplish this):
		987
		988	if (defined $AnyEvent::MODEL) {
		989	# AnyEvent already initialised, so load Coro::AnyEvent
		990	require Coro::AnyEvent;
		991	} else {
		992	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
		993	# as soon as it is
		994	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
		995	}
952		996
953	=back	997	=back
954		998
955	=head1 WHAT TO DO IN A MODULE	999	=head1 WHAT TO DO IN A MODULE
956		1000
…		…
1105		1149
1106	package AnyEvent;	1150	package AnyEvent;
1107		1151
1108	# basically a tuned-down version of common::sense	1152	# basically a tuned-down version of common::sense
1109	sub common_sense {	1153	sub common_sense {
1110	# no warnings	1154	# from common:.sense 1.0
1111	${^WARNING_BITS} ^= ${^WARNING_BITS};	1155	${^WARNING_BITS} = "\xfc\x3f\x33\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x00";
1112	# use strict vars subs	1156	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1113	$^H \|= 0x00000600;	1157	$^H \|= 0x00000600;
1114	}	1158	}
1115		1159
1116	BEGIN { AnyEvent::common_sense }	1160	BEGIN { AnyEvent::common_sense }
1117		1161
1118	use Carp ();	1162	use Carp ();
1119		1163
1120	our $VERSION = '5.0';	1164	our $VERSION = '5.261';
1121	our $MODEL;	1165	our $MODEL;
1122		1166
1123	our $AUTOLOAD;	1167	our $AUTOLOAD;
1124	our @ISA;	1168	our @ISA;
1125		1169
1126	our @REGISTRY;	1170	our @REGISTRY;
1127		1171
1128	our $WIN32;
1129
1130	our $VERBOSE;	1172	our $VERBOSE;
1131		1173
1132	BEGIN {	1174	BEGIN {
1133	eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }";	1175	require "AnyEvent/constants.pl";
		1176
1134	eval "sub TAINT(){ " . (${^TAINT}*1) . " }";	1177	eval "sub TAINT (){" . (${^TAINT}*1) . "}";
1135		1178
1136	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1179	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1137	if ${^TAINT};	1180	if ${^TAINT};
1138		1181
1139	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1182	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;
…		…
1182	our @post_detect;	1225	our @post_detect;
1183		1226
1184	sub post_detect(&) {	1227	sub post_detect(&) {
1185	my ($cb) = @_;	1228	my ($cb) = @_;
1186		1229
1187	if ($MODEL) {
1188	$cb->();
1189
1190	undef
1191	} else {
1192	push @post_detect, $cb;	1230	push @post_detect, $cb;
1193		1231
1194	defined wantarray	1232	defined wantarray
1195	? bless \$cb, "AnyEvent::Util::postdetect"	1233	? bless \$cb, "AnyEvent::Util::postdetect"
1196	: ()	1234	: ()
1197	}
1198	}	1235	}
1199		1236
1200	sub AnyEvent::Util::postdetect::DESTROY {	1237	sub AnyEvent::Util::postdetect::DESTROY {
1201	@post_detect = grep $_ != ${$_[0]}, @post_detect;	1238	@post_detect = grep $_ != ${$_[0]}, @post_detect;
1202	}	1239	}
1203		1240
1204	sub detect() {	1241	sub detect() {
		1242	# free some memory
		1243	*detect = sub () { $MODEL };
		1244
		1245	local $!; # for good measure
		1246	local $SIG{__DIE__};
		1247
		1248	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {
		1249	my $model = "AnyEvent::Impl::$1";
		1250	if (eval "require $model") {
		1251	$MODEL = $model;
		1252	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
		1253	} else {
		1254	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;
		1255	}
		1256	}
		1257
		1258	# check for already loaded models
1205	unless ($MODEL) {	1259	unless ($MODEL) {
1206	local $SIG{__DIE__};	1260	for (@REGISTRY, @models) {
1207		1261	my ($package, $model) = @$_;
1208	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1262	if (${"$package\::VERSION"} > 0) {
1209	my $model = "AnyEvent::Impl::$1";
1210	if (eval "require $model") {	1263	if (eval "require $model") {
1211	$MODEL = $model;	1264	$MODEL = $model;
1212	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;	1265	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;
1213	} else {	1266	last;
1214	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1267	}
1215	}	1268	}
1216	}	1269	}
1217		1270
1218	# check for already loaded models
1219	unless ($MODEL) {	1271	unless ($MODEL) {
		1272	# try to autoload a model
1220	for (@REGISTRY, @models) {	1273	for (@REGISTRY, @models) {
1221	my ($package, $model) = @$_;	1274	my ($package, $model, $autoload) = @$_;
		1275	if (
		1276	$autoload
		1277	and eval "require $package"
1222	if (${"$package\::VERSION"} > 0) {	1278	and ${"$package\::VERSION"} > 0
1223	if (eval "require $model") {	1279	and eval "require $model"
		1280	) {
1224	$MODEL = $model;	1281	$MODEL = $model;
1225	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;	1282	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1226	last;	1283	last;
1227	}
1228	}	1284	}
1229	}	1285	}
1230		1286
1231	unless ($MODEL) {
1232	# try to autoload a model
1233	for (@REGISTRY, @models) {
1234	my ($package, $model, $autoload) = @$_;
1235	if (
1236	$autoload
1237	and eval "require $package"
1238	and ${"$package\::VERSION"} > 0
1239	and eval "require $model"
1240	) {
1241	$MODEL = $model;
1242	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1243	last;
1244	}
1245	}
1246
1247	$MODEL	1287	$MODEL
1248	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";	1288	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";
1249	}
1250	}	1289	}
1251
1252	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1253
1254	unshift @ISA, $MODEL;
1255
1256	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};
1257
1258	(shift @post_detect)->() while @post_detect;
1259	}	1290	}
		1291
		1292	@models = (); # free probe data
		1293
		1294	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
		1295	unshift @ISA, $MODEL;
		1296
		1297	# now nuke some methods that are overriden by the backend.
		1298	# SUPER is not allowed.
		1299	for (qw(time signal child idle)) {
		1300	undef &{"AnyEvent::Base::$_"}
		1301	if defined &{"$MODEL\::$_"};
		1302	}
		1303
		1304	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};
		1305
		1306	(shift @post_detect)->() while @post_detect;
		1307
		1308	*post_detect = sub(&) {
		1309	shift->();
		1310
		1311	undef
		1312	};
1260		1313
1261	$MODEL	1314	$MODEL
1262	}	1315	}
1263		1316
1264	sub AUTOLOAD {	1317	sub AUTOLOAD {
1265	(my $func = $AUTOLOAD) =~ s/.*://;	1318	(my $func = $AUTOLOAD) =~ s/.*://;
1266		1319
1267	$method{$func}	1320	$method{$func}
1268	or Carp::croak "$func: not a valid method for AnyEvent objects";	1321	or Carp::croak "$func: not a valid AnyEvent class method";
1269		1322
1270	detect unless $MODEL;	1323	detect;
1271		1324
1272	my $class = shift;	1325	my $class = shift;
1273	$class->$func (@_);	1326	$class->$func (@_);
1274	}	1327	}
1275		1328
…		…
1292		1345
1293	=head1 SIMPLIFIED AE API	1346	=head1 SIMPLIFIED AE API
1294		1347
1295	Starting with version 5.0, AnyEvent officially supports a second, much	1348	Starting with version 5.0, AnyEvent officially supports a second, much
1296	simpler, API that is designed to reduce the calling, typing and memory	1349	simpler, API that is designed to reduce the calling, typing and memory
1297	overhead.	1350	overhead by using function call syntax and a fixed number of parameters.
1298		1351
1299	See the L<AE> manpage for details.	1352	See the L<AE> manpage for details.
1300		1353
1301	=cut	1354	=cut
1302		1355
1303	package AE;	1356	package AE;
1304		1357
1305	our $VERSION = $AnyEvent::VERSION;	1358	our $VERSION = $AnyEvent::VERSION;
		1359
		1360	# fall back to the main API by default - backends and AnyEvent::Base
		1361	# implementations can overwrite these.
1306		1362
1307	sub io($$$) {	1363	sub io($$$) {
1308	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])	1364	AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1309	}	1365	}
1310		1366
…		…
1342		1398
1343	package AnyEvent::Base;	1399	package AnyEvent::Base;
1344		1400
1345	# default implementations for many methods	1401	# default implementations for many methods
1346		1402
1347	sub _time {	1403	sub time {
		1404	eval q{ # poor man's autoloading {}
1348	# probe for availability of Time::HiRes	1405	# probe for availability of Time::HiRes
1349	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1406	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1350	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1407	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;
1351	*_time = \&Time::HiRes::time;	1408	*AE::time = \&Time::HiRes::time;
1352	# if (eval "use POSIX (); (POSIX::times())...	1409	# if (eval "use POSIX (); (POSIX::times())...
1353	} else {	1410	} else {
1354	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1411	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;
1355	*_time = sub { time }; # epic fail	1412	*AE::time = sub (){ time }; # epic fail
		1413	}
		1414
		1415	*time = sub { AE::time }; # different prototypes
1356	}	1416	};
		1417	die if $@;
1357		1418
1358	&_time	1419	&time
1359	}	1420	}
1360		1421
1361	sub time { _time }	1422	*now = \&time;
1362	sub now { _time }	1423
1363	sub now_update { }	1424	sub now_update { }
1364		1425
1365	# default implementation for ->condvar	1426	# default implementation for ->condvar
1366		1427
1367	sub condvar {	1428	sub condvar {
		1429	eval q{ # poor man's autoloading {}
		1430	*condvar = sub {
1368	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"	1431	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
		1432	};
		1433
		1434	*AE::cv = sub (;&) {
		1435	bless { @_ ? (_ae_cb => shift) : () }, "AnyEvent::CondVar"
		1436	};
		1437	};
		1438	die if $@;
		1439
		1440	&condvar
1369	}	1441	}
1370		1442
1371	# default implementation for ->signal	1443	# default implementation for ->signal
1372		1444
1373	our $HAVE_ASYNC_INTERRUPT;	1445	our $HAVE_ASYNC_INTERRUPT;
1374		1446
1375	sub _have_async_interrupt() {	1447	sub _have_async_interrupt() {
1376	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}	1448	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
1377	&& eval "use Async::Interrupt 1.0 (); 1")	1449	&& eval "use Async::Interrupt 1.02 (); 1")
1378	unless defined $HAVE_ASYNC_INTERRUPT;	1450	unless defined $HAVE_ASYNC_INTERRUPT;
1379		1451
1380	$HAVE_ASYNC_INTERRUPT	1452	$HAVE_ASYNC_INTERRUPT
1381	}	1453	}
1382		1454
1383	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1455	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1384	our (%SIG_ASY, %SIG_ASY_W);	1456	our (%SIG_ASY, %SIG_ASY_W);
1385	our ($SIG_COUNT, $SIG_TW);	1457	our ($SIG_COUNT, $SIG_TW);
1386		1458
1387	sub _signal_exec {
1388	$HAVE_ASYNC_INTERRUPT
1389	? $SIGPIPE_R->drain
1390	: sysread $SIGPIPE_R, my $dummy, 9;
1391
1392	while (%SIG_EV) {
1393	for (keys %SIG_EV) {
1394	delete $SIG_EV{$_};
1395	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1396	}
1397	}
1398	}
1399
1400	# install a dummy wakeup watcher to reduce signal catching latency	1459	# install a dummy wakeup watcher to reduce signal catching latency
		1460	# used by Impls
1401	sub _sig_add() {	1461	sub _sig_add() {
1402	unless ($SIG_COUNT++) {	1462	unless ($SIG_COUNT++) {
1403	# try to align timer on a full-second boundary, if possible	1463	# try to align timer on a full-second boundary, if possible
1404	my $NOW = AE::now;	1464	my $NOW = AE::now;
1405		1465
…		…
1415	undef $SIG_TW	1475	undef $SIG_TW
1416	unless --$SIG_COUNT;	1476	unless --$SIG_COUNT;
1417	}	1477	}
1418		1478
1419	our $_sig_name_init; $_sig_name_init = sub {	1479	our $_sig_name_init; $_sig_name_init = sub {
1420	eval q{ # poor man's autoloading	1480	eval q{ # poor man's autoloading {}
1421	undef $_sig_name_init;	1481	undef $_sig_name_init;
1422		1482
1423	if (_have_async_interrupt) {	1483	if (_have_async_interrupt) {
1424	*sig2num = \&Async::Interrupt::sig2num;	1484	*sig2num = \&Async::Interrupt::sig2num;
1425	*sig2name = \&Async::Interrupt::sig2name;	1485	*sig2name = \&Async::Interrupt::sig2name;
…		…
1457	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;	1517	$SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1458		1518
1459	} else {	1519	} else {
1460	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;	1520	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1461		1521
1462	require Fcntl;
1463
1464	if (AnyEvent::WIN32) {	1522	if (AnyEvent::WIN32) {
1465	require AnyEvent::Util;	1523	require AnyEvent::Util;
1466		1524
1467	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();	1525	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1468	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;	1526	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R;
1469	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case	1527	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case
1470	} else {	1528	} else {
1471	pipe $SIGPIPE_R, $SIGPIPE_W;	1529	pipe $SIGPIPE_R, $SIGPIPE_W;
1472	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;	1530	fcntl $SIGPIPE_R, AnyEvent::F_SETFL, AnyEvent::O_NONBLOCK if $SIGPIPE_R;
1473	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case	1531	fcntl $SIGPIPE_W, AnyEvent::F_SETFL, AnyEvent::O_NONBLOCK if $SIGPIPE_W; # just in case
1474		1532
1475	# not strictly required, as $^F is normally 2, but let's make sure...	1533	# not strictly required, as $^F is normally 2, but let's make sure...
1476	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;	1534	fcntl $SIGPIPE_R, AnyEvent::F_SETFD, AnyEvent::FD_CLOEXEC;
1477	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;	1535	fcntl $SIGPIPE_W, AnyEvent::F_SETFD, AnyEvent::FD_CLOEXEC;
1478	}	1536	}
1479		1537
1480	$SIGPIPE_R	1538	$SIGPIPE_R
1481	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";	1539	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1482		1540
1483	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;	1541	$SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec;
1484	}	1542	}
1485		1543
1486	*signal = sub {	1544	*signal = $HAVE_ASYNC_INTERRUPT
		1545	? sub {
1487	my (undef, %arg) = @_;	1546	my (undef, %arg) = @_;
1488		1547
1489	my $signal = uc $arg{signal}
1490	or Carp::croak "required option 'signal' is missing";
1491
1492	if ($HAVE_ASYNC_INTERRUPT) {
1493	# async::interrupt	1548	# async::interrupt
1494
1495	$signal = sig2num $signal;	1549	my $signal = sig2num $arg{signal};
1496	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1550	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1497		1551
1498	$SIG_ASY{$signal} \|\|= new Async::Interrupt	1552	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1499	cb => sub { undef $SIG_EV{$signal} },	1553	cb => sub { undef $SIG_EV{$signal} },
1500	signal => $signal,	1554	signal => $signal,
1501	pipe => [$SIGPIPE_R->filenos],	1555	pipe => [$SIGPIPE_R->filenos],
1502	pipe_autodrain => 0,	1556	pipe_autodrain => 0,
1503	;	1557	;
1504		1558
1505	} else {	1559	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
		1560	}
		1561	: sub {
		1562	my (undef, %arg) = @_;
		1563
1506	# pure perl	1564	# pure perl
1507
1508	# AE::Util has been loaded in signal
1509	$signal = sig2name $signal;	1565	my $signal = sig2name $arg{signal};
1510	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1566	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1511		1567
1512	$SIG{$signal} \|\|= sub {	1568	$SIG{$signal} \|\|= sub {
1513	local $!;	1569	local $!;
1514	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1570	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
1515	undef $SIG_EV{$signal};	1571	undef $SIG_EV{$signal};
1516	};	1572	};
1517		1573
1518	# can't do signal processing without introducing races in pure perl,	1574	# can't do signal processing without introducing races in pure perl,
1519	# so limit the signal latency.	1575	# so limit the signal latency.
1520	_sig_add;	1576	_sig_add;
1521	}
1522		1577
1523	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"	1578	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
		1579	}
1524	};	1580	;
1525		1581
1526	*AnyEvent::Base::signal::DESTROY = sub {	1582	*AnyEvent::Base::signal::DESTROY = sub {
1527	my ($signal, $cb) = @{$_[0]};	1583	my ($signal, $cb) = @{$_[0]};
1528		1584
1529	_sig_del;	1585	_sig_del;
…		…
1536	# print weird messages, or just unconditionally exit	1592	# print weird messages, or just unconditionally exit
1537	# instead of getting the default action.	1593	# instead of getting the default action.
1538	undef $SIG{$signal}	1594	undef $SIG{$signal}
1539	unless keys %{ $SIG_CB{$signal} };	1595	unless keys %{ $SIG_CB{$signal} };
1540	};	1596	};
		1597
		1598	*_signal_exec = sub {
		1599	$HAVE_ASYNC_INTERRUPT
		1600	? $SIGPIPE_R->drain
		1601	: sysread $SIGPIPE_R, (my $dummy), 9;
		1602
		1603	while (%SIG_EV) {
		1604	for (keys %SIG_EV) {
		1605	delete $SIG_EV{$_};
		1606	$_->() for values %{ $SIG_CB{$_} \|\| {} };
		1607	}
		1608	}
		1609	};
1541	};	1610	};
1542	die if $@;	1611	die if $@;
		1612
1543	&signal	1613	&signal
1544	}	1614	}
1545		1615
1546	# default implementation for ->child	1616	# default implementation for ->child
1547		1617
1548	our %PID_CB;	1618	our %PID_CB;
1549	our $CHLD_W;	1619	our $CHLD_W;
1550	our $CHLD_DELAY_W;	1620	our $CHLD_DELAY_W;
1551	our $WNOHANG;	1621	our $WNOHANG;
1552		1622
		1623	# used by many Impl's
1553	sub _emit_childstatus($$) {	1624	sub _emit_childstatus($$) {
1554	my (undef, $rpid, $rstatus) = @_;	1625	my (undef, $rpid, $rstatus) = @_;
1555		1626
1556	$_->($rpid, $rstatus)	1627	$_->($rpid, $rstatus)
1557	for values %{ $PID_CB{$rpid} \|\| {} },	1628	for values %{ $PID_CB{$rpid} \|\| {} },
1558	values %{ $PID_CB{0} \|\| {} };	1629	values %{ $PID_CB{0} \|\| {} };
1559	}	1630	}
1560		1631
1561	sub _sigchld {
1562	my $pid;
1563
1564	AnyEvent->_emit_childstatus ($pid, $?)
1565	while ($pid = waitpid -1, $WNOHANG) > 0;
1566	}
1567
1568	sub child {	1632	sub child {
		1633	eval q{ # poor man's autoloading {}
		1634	*_sigchld = sub {
		1635	my $pid;
		1636
		1637	AnyEvent->_emit_childstatus ($pid, $?)
		1638	while ($pid = waitpid -1, $WNOHANG) > 0;
		1639	};
		1640
		1641	*child = sub {
1569	my (undef, %arg) = @_;	1642	my (undef, %arg) = @_;
1570		1643
1571	defined (my $pid = $arg{pid} + 0)	1644	defined (my $pid = $arg{pid} + 0)
1572	or Carp::croak "required option 'pid' is missing";	1645	or Carp::croak "required option 'pid' is missing";
1573		1646
1574	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1647	$PID_CB{$pid}{$arg{cb}} = $arg{cb};
1575		1648
1576	# WNOHANG is almost cetrainly 1 everywhere	1649	# WNOHANG is almost cetrainly 1 everywhere
1577	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1650	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1578	? 1	1651	? 1
1579	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1652	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1580		1653
1581	unless ($CHLD_W) {	1654	unless ($CHLD_W) {
1582	$CHLD_W = AE::signal CHLD => \&_sigchld;	1655	$CHLD_W = AE::signal CHLD => \&_sigchld;
1583	# child could be a zombie already, so make at least one round	1656	# child could be a zombie already, so make at least one round
1584	&_sigchld;	1657	&_sigchld;
1585	}	1658	}
1586		1659
1587	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1660	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
1588	}	1661	};
1589		1662
1590	sub AnyEvent::Base::child::DESTROY {	1663	*AnyEvent::Base::child::DESTROY = sub {
1591	my ($pid, $cb) = @{$_[0]};	1664	my ($pid, $cb) = @{$_[0]};
1592		1665
1593	delete $PID_CB{$pid}{$cb};	1666	delete $PID_CB{$pid}{$cb};
1594	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1667	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1595		1668
1596	undef $CHLD_W unless keys %PID_CB;	1669	undef $CHLD_W unless keys %PID_CB;
		1670	};
		1671	};
		1672	die if $@;
		1673
		1674	&child
1597	}	1675	}
1598		1676
1599	# idle emulation is done by simply using a timer, regardless	1677	# idle emulation is done by simply using a timer, regardless
1600	# of whether the process is idle or not, and not letting	1678	# of whether the process is idle or not, and not letting
1601	# the callback use more than 50% of the time.	1679	# the callback use more than 50% of the time.
1602	sub idle {	1680	sub idle {
		1681	eval q{ # poor man's autoloading {}
		1682	*idle = sub {
1603	my (undef, %arg) = @_;	1683	my (undef, %arg) = @_;
1604		1684
1605	my ($cb, $w, $rcb) = $arg{cb};	1685	my ($cb, $w, $rcb) = $arg{cb};
1606		1686
1607	$rcb = sub {	1687	$rcb = sub {
1608	if ($cb) {	1688	if ($cb) {
1609	$w = _time;	1689	$w = _time;
1610	&$cb;	1690	&$cb;
1611	$w = _time - $w;	1691	$w = _time - $w;
1612		1692
1613	# never use more then 50% of the time for the idle watcher,	1693	# never use more then 50% of the time for the idle watcher,
1614	# within some limits	1694	# within some limits
1615	$w = 0.0001 if $w < 0.0001;	1695	$w = 0.0001 if $w < 0.0001;
1616	$w = 5 if $w > 5;	1696	$w = 5 if $w > 5;
1617		1697
1618	$w = AE::timer $w, 0, $rcb;	1698	$w = AE::timer $w, 0, $rcb;
1619	} else {	1699	} else {
1620	# clean up...	1700	# clean up...
1621	undef $w;	1701	undef $w;
1622	undef $rcb;	1702	undef $rcb;
		1703	}
		1704	};
		1705
		1706	$w = AE::timer 0.05, 0, $rcb;
		1707
		1708	bless \\$cb, "AnyEvent::Base::idle"
1623	}	1709	};
		1710
		1711	*AnyEvent::Base::idle::DESTROY = sub {
		1712	undef $${$_[0]};
		1713	};
1624	};	1714	};
		1715	die if $@;
1625		1716
1626	$w = AE::timer 0.05, 0, $rcb;	1717	&idle
1627
1628	bless \\$cb, "AnyEvent::Base::idle"
1629	}
1630
1631	sub AnyEvent::Base::idle::DESTROY {
1632	undef $${$_[0]};
1633	}	1718	}
1634		1719
1635	package AnyEvent::CondVar;	1720	package AnyEvent::CondVar;
1636		1721
1637	our @ISA = AnyEvent::CondVar::Base::;	1722	our @ISA = AnyEvent::CondVar::Base::;
…		…
1911	warn "read: $input\n"; # output what has been read	1996	warn "read: $input\n"; # output what has been read
1912	$cv->send if $input =~ /^q/i; # quit program if /^q/i	1997	$cv->send if $input =~ /^q/i; # quit program if /^q/i
1913	},	1998	},
1914	);	1999	);
1915		2000
1916	my $time_watcher; # can only be used once
1917
1918	sub new_timer {
1919	$timer = AnyEvent->timer (after => 1, cb => sub {	2001	my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub {
1920	warn "timeout\n"; # print 'timeout' about every second	2002	warn "timeout\n"; # print 'timeout' at most every second
1921	&new_timer; # and restart the time
1922	});	2003	});
1923	}
1924
1925	new_timer; # create first timer
1926		2004
1927	$cv->recv; # wait until user enters /^q/i	2005	$cv->recv; # wait until user enters /^q/i
1928		2006
1929	=head1 REAL-WORLD EXAMPLE	2007	=head1 REAL-WORLD EXAMPLE
1930		2008
…		…
2003		2081
2004	The actual code goes further and collects all errors (C<die>s, exceptions)	2082	The actual code goes further and collects all errors (C<die>s, exceptions)
2005	that occurred during request processing. The C<result> method detects	2083	that occurred during request processing. The C<result> method detects
2006	whether an exception as thrown (it is stored inside the $txn object)	2084	whether an exception as thrown (it is stored inside the $txn object)
2007	and just throws the exception, which means connection errors and other	2085	and just throws the exception, which means connection errors and other
2008	problems get reported tot he code that tries to use the result, not in a	2086	problems get reported to the code that tries to use the result, not in a
2009	random callback.	2087	random callback.
2010		2088
2011	All of this enables the following usage styles:	2089	All of this enables the following usage styles:
2012		2090
2013	1. Blocking:	2091	1. Blocking:
…		…
2374	As you can see, the AnyEvent + EV combination even beats the	2452	As you can see, the AnyEvent + EV combination even beats the
2375	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl	2453	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl
2376	backend easily beats IO::Lambda and POE.	2454	backend easily beats IO::Lambda and POE.
2377		2455
2378	And even the 100% non-blocking version written using the high-level (and	2456	And even the 100% non-blocking version written using the high-level (and
2379	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a	2457	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda
2380	large margin, even though it does all of DNS, tcp-connect and socket I/O	2458	higher level ("unoptimised") abstractions by a large margin, even though
2381	in a non-blocking way.	2459	it does all of DNS, tcp-connect and socket I/O in a non-blocking way.
2382		2460
2383	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and	2461	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and
2384	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are	2462	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are
2385	part of the IO::lambda distribution and were used without any changes.	2463	part of the IO::Lambda distribution and were used without any changes.
2386		2464
2387		2465
2388	=head1 SIGNALS	2466	=head1 SIGNALS
2389		2467
2390	AnyEvent currently installs handlers for these signals:	2468	AnyEvent currently installs handlers for these signals:
…		…
2432	it's built-in modules) are required to use it.	2510	it's built-in modules) are required to use it.
2433		2511
2434	That does not mean that AnyEvent won't take advantage of some additional	2512	That does not mean that AnyEvent won't take advantage of some additional
2435	modules if they are installed.	2513	modules if they are installed.
2436		2514
2437	This section epxlains which additional modules will be used, and how they	2515	This section explains which additional modules will be used, and how they
2438	affect AnyEvent's operetion.	2516	affect AnyEvent's operation.
2439		2517
2440	=over 4	2518	=over 4
2441		2519
2442	=item L<Async::Interrupt>	2520	=item L<Async::Interrupt>
2443		2521
…		…
2448	catch the signals) with some delay (default is 10 seconds, look for	2526	catch the signals) with some delay (default is 10 seconds, look for
2449	C<$AnyEvent::MAX_SIGNAL_LATENCY>).	2527	C<$AnyEvent::MAX_SIGNAL_LATENCY>).
2450		2528
2451	If this module is available, then it will be used to implement signal	2529	If this module is available, then it will be used to implement signal
2452	catching, which means that signals will not be delayed, and the event loop	2530	catching, which means that signals will not be delayed, and the event loop
2453	will not be interrupted regularly, which is more efficient (And good for	2531	will not be interrupted regularly, which is more efficient (and good for
2454	battery life on laptops).	2532	battery life on laptops).
2455		2533
2456	This affects not just the pure-perl event loop, but also other event loops	2534	This affects not just the pure-perl event loop, but also other event loops
2457	that have no signal handling on their own (e.g. Glib, Tk, Qt).	2535	that have no signal handling on their own (e.g. Glib, Tk, Qt).
2458		2536
…		…
2470	automatic timer adjustments even when no monotonic clock is available,	2548	automatic timer adjustments even when no monotonic clock is available,
2471	can take avdantage of advanced kernel interfaces such as C<epoll> and	2549	can take avdantage of advanced kernel interfaces such as C<epoll> and
2472	C<kqueue>, and is the fastest backend I<by far>. You can even embed	2550	C<kqueue>, and is the fastest backend I<by far>. You can even embed
2473	L<Glib>/L<Gtk2> in it (or vice versa, see L<EV::Glib> and L<Glib::EV>).	2551	L<Glib>/L<Gtk2> in it (or vice versa, see L<EV::Glib> and L<Glib::EV>).
2474		2552
		2553	If you only use backends that rely on another event loop (e.g. C<Tk>),
		2554	then this module will do nothing for you.
		2555
2475	=item L<Guard>	2556	=item L<Guard>
2476		2557
2477	The guard module, when used, will be used to implement	2558	The guard module, when used, will be used to implement
2478	C<AnyEvent::Util::guard>. This speeds up guards considerably (and uses a	2559	C<AnyEvent::Util::guard>. This speeds up guards considerably (and uses a
2479	lot less memory), but otherwise doesn't affect guard operation much. It is	2560	lot less memory), but otherwise doesn't affect guard operation much. It is
2480	purely used for performance.	2561	purely used for performance.
2481		2562
2482	=item L<JSON> and L<JSON::XS>	2563	=item L<JSON> and L<JSON::XS>
2483		2564
2484	This module is required when you want to read or write JSON data via	2565	One of these modules is required when you want to read or write JSON data
2485	L<AnyEvent::Handle>. It is also written in pure-perl, but can take	2566	via L<AnyEvent::Handle>. L<JSON> is also written in pure-perl, but can take
2486	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.	2567	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.
2487
2488	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is
2489	installed.
2490		2568
2491	=item L<Net::SSLeay>	2569	=item L<Net::SSLeay>
2492		2570
2493	Implementing TLS/SSL in Perl is certainly interesting, but not very	2571	Implementing TLS/SSL in Perl is certainly interesting, but not very
2494	worthwhile: If this module is installed, then L<AnyEvent::Handle> (with	2572	worthwhile: If this module is installed, then L<AnyEvent::Handle> (with
…		…
2505		2583
2506		2584
2507	=head1 FORK	2585	=head1 FORK
2508		2586
2509	Most event libraries are not fork-safe. The ones who are usually are	2587	Most event libraries are not fork-safe. The ones who are usually are
2510	because they rely on inefficient but fork-safe C<select> or C<poll>	2588	because they rely on inefficient but fork-safe C<select> or C<poll> calls
2511	calls. Only L<EV> is fully fork-aware.	2589	- higher performance APIs such as BSD's kqueue or the dreaded Linux epoll
		2590	are usually badly thought-out hacks that are incompatible with fork in
		2591	one way or another. Only L<EV> is fully fork-aware and ensures that you
		2592	continue event-processing in both parent and child (or both, if you know
		2593	what you are doing).
		2594
		2595	This means that, in general, you cannot fork and do event processing in
		2596	the child if the event library was initialised before the fork (which
		2597	usually happens when the first AnyEvent watcher is created, or the library
		2598	is loaded).
2512		2599
2513	If you have to fork, you must either do so I<before> creating your first	2600	If you have to fork, you must either do so I<before> creating your first
2514	watcher OR you must not use AnyEvent at all in the child OR you must do	2601	watcher OR you must not use AnyEvent at all in the child OR you must do
2515	something completely out of the scope of AnyEvent.	2602	something completely out of the scope of AnyEvent.
		2603
		2604	The problem of doing event processing in the parent I<and> the child
		2605	is much more complicated: even for backends that I<are> fork-aware or
		2606	fork-safe, their behaviour is not usually what you want: fork clones all
		2607	watchers, that means all timers, I/O watchers etc. are active in both
		2608	parent and child, which is almost never what you want. USing C<exec>
		2609	to start worker children from some kind of manage rprocess is usually
		2610	preferred, because it is much easier and cleaner, at the expense of having
		2611	to have another binary.
2516		2612
2517		2613
2518	=head1 SECURITY CONSIDERATIONS	2614	=head1 SECURITY CONSIDERATIONS
2519		2615
2520	AnyEvent can be forced to load any event model via	2616	AnyEvent can be forced to load any event model via

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.279 by root, Sun Aug 9 16:05:11 2009 UTC vs. Revision 1.322 by root, Sat May 8 07:51:39 2010 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.279 by root, Sun Aug 9 16:05:11 2009 UTC vs.
Revision 1.322 by root, Sat May 8 07:51:39 2010 UTC