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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.281 by root, Mon Aug 10 01:17:38 2009 UTC vs.
Revision 1.312 by root, Mon Feb 15 18:02:35 2010 UTC

…		…
363	might affect timers and time-outs.	363	might affect timers and time-outs.
364		364
365	When this is the case, you can call this method, which will update the	365	When this is the case, you can call this method, which will update the
366	event loop's idea of "current time".	366	event loop's idea of "current time".
367		367
		368	A typical example would be a script in a web server (e.g. C<mod_perl>) -
		369	when mod_perl executes the script, then the event loop will have the wrong
		370	idea about the "current time" (being potentially far in the past, when the
		371	script ran the last time). In that case you should arrange a call to C<<
		372	AnyEvent->now_update >> each time the web server process wakes up again
		373	(e.g. at the start of your script, or in a handler).
		374
368	Note that updating the time I<might> cause some events to be handled.	375	Note that updating the time I<might> cause some events to be handled.
369		376
370	=back	377	=back
371		378
372	=head2 SIGNAL WATCHERS	379	=head2 SIGNAL WATCHERS
…		…
395	correctly.	402	correctly.
396		403
397	Example: exit on SIGINT	404	Example: exit on SIGINT
398		405
399	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });	406	my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
		407
		408	=head3 Restart Behaviour
		409
		410	While restart behaviour is up to the event loop implementation, most will
		411	not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's
		412	pure perl implementation).
		413
		414	=head3 Safe/Unsafe Signals
		415
		416	Perl signals can be either "safe" (synchronous to opcode handling) or
		417	"unsafe" (asynchronous) - the former might get delayed indefinitely, the
		418	latter might corrupt your memory.
		419
		420	AnyEvent signal handlers are, in addition, synchronous to the event loop,
		421	i.e. they will not interrupt your running perl program but will only be
		422	called as part of the normal event handling (just like timer, I/O etc.
		423	callbacks, too).
400		424
401	=head3 Signal Races, Delays and Workarounds	425	=head3 Signal Races, Delays and Workarounds
402		426
403	Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching	427	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	428	callbacks to signals in a generic way, which is a pity, as you cannot
…		…
479		503
480	=head2 IDLE WATCHERS	504	=head2 IDLE WATCHERS
481		505
482	$w = AnyEvent->idle (cb => <callback>);	506	$w = AnyEvent->idle (cb => <callback>);
483		507
484	Sometimes there is a need to do something, but it is not so important	508	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	509	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		510
489	Idle watchers ideally get invoked when the event loop has nothing	511	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	512	is not so important (or wise) to do it instantly. The callback will be
491	events. Instead of blocking, the idle watcher is invoked.	513	invoked only when there is "nothing better to do", which is usually
		514	defined as "all outstanding events have been handled and no new events
		515	have been detected". That means that idle watchers ideally get invoked
		516	when the event loop has just polled for new events but none have been
		517	detected. Instead of blocking to wait for more events, the idle watchers
		518	will be invoked.
492		519
493	Most event loops unfortunately do not really support idle watchers (only	520	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	521	EV, Event and Glib do it in a usable fashion) - for the rest, AnyEvent
495	will simply call the callback "from time to time".	522	will simply call the callback "from time to time".
496		523
497	Example: read lines from STDIN, but only process them when the	524	Example: read lines from STDIN, but only process them when the
498	program is otherwise idle:	525	program is otherwise idle:
…		…
592	after => 1,	619	after => 1,
593	cb => sub { $result_ready->send },	620	cb => sub { $result_ready->send },
594	);	621	);
595		622
596	# this "blocks" (while handling events) till the callback	623	# this "blocks" (while handling events) till the callback
597	# calls -<send	624	# calls ->send
598	$result_ready->recv;	625	$result_ready->recv;
599		626
600	Example: wait for a timer, but take advantage of the fact that condition	627	Example: wait for a timer, but take advantage of the fact that condition
601	variables are also callable directly.	628	variables are also callable directly.
602		629
…		…
942	You should check C<$AnyEvent::MODEL> before adding to this array, though:	969	You should check C<$AnyEvent::MODEL> before adding to this array, though:
943	if it is defined then the event loop has already been detected, and the	970	if it is defined then the event loop has already been detected, and the
944	array will be ignored.	971	array will be ignored.
945		972
946	Best use C<AnyEvent::post_detect { BLOCK }> when your application allows	973	Best use C<AnyEvent::post_detect { BLOCK }> when your application allows
947	it,as it takes care of these details.	974	it, as it takes care of these details.
948		975
949	This variable is mainly useful for modules that can do something useful	976	This variable is mainly useful for modules that can do something useful
950	when AnyEvent is used and thus want to know when it is initialised, but do	977	when AnyEvent is used and thus want to know when it is initialised, but do
951	not need to even load it by default. This array provides the means to hook	978	not need to even load it by default. This array provides the means to hook
952	into AnyEvent passively, without loading it.	979	into AnyEvent passively, without loading it.
		980
		981	Example: To load Coro::AnyEvent whenever Coro and AnyEvent are used
		982	together, you could put this into Coro (this is the actual code used by
		983	Coro to accomplish this):
		984
		985	if (defined $AnyEvent::MODEL) {
		986	# AnyEvent already initialised, so load Coro::AnyEvent
		987	require Coro::AnyEvent;
		988	} else {
		989	# AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
		990	# as soon as it is
		991	push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
		992	}
953		993
954	=back	994	=back
955		995
956	=head1 WHAT TO DO IN A MODULE	996	=head1 WHAT TO DO IN A MODULE
957		997
…		…
1106		1146
1107	package AnyEvent;	1147	package AnyEvent;
1108		1148
1109	# basically a tuned-down version of common::sense	1149	# basically a tuned-down version of common::sense
1110	sub common_sense {	1150	sub common_sense {
1111	# no warnings	1151	# from common:.sense 1.0
1112	${^WARNING_BITS} ^= ${^WARNING_BITS};	1152	${^WARNING_BITS} = "\xfc\x3f\x33\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x00";
1113	# use strict vars subs	1153	# use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1114	$^H \|= 0x00000600;	1154	$^H \|= 0x00000600;
1115	}	1155	}
1116		1156
1117	BEGIN { AnyEvent::common_sense }	1157	BEGIN { AnyEvent::common_sense }
1118		1158
1119	use Carp ();	1159	use Carp ();
1120		1160
1121	our $VERSION = '5.01';	1161	our $VERSION = '5.24';
1122	our $MODEL;	1162	our $MODEL;
1123		1163
1124	our $AUTOLOAD;	1164	our $AUTOLOAD;
1125	our @ISA;	1165	our @ISA;
1126		1166
1127	our @REGISTRY;	1167	our @REGISTRY;
1128		1168
1129	our $WIN32;
1130
1131	our $VERBOSE;	1169	our $VERBOSE;
1132		1170
1133	BEGIN {	1171	BEGIN {
		1172	eval "sub CYGWIN(){" . (($^O =~ /cygwin/i) *1) . "}";
1134	eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }";	1173	eval "sub WIN32 (){" . (($^O =~ /mswin32/i)*1) . "}";
1135	eval "sub TAINT(){ " . (${^TAINT}*1) . " }";	1174	eval "sub TAINT (){" . (${^TAINT} *1) . "}";
1136		1175
1137	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}	1176	delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV}
1138	if ${^TAINT};	1177	if ${^TAINT};
1139		1178
1140	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;	1179	$VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1;
…		…
1201	sub AnyEvent::Util::postdetect::DESTROY {	1240	sub AnyEvent::Util::postdetect::DESTROY {
1202	@post_detect = grep $_ != ${$_[0]}, @post_detect;	1241	@post_detect = grep $_ != ${$_[0]}, @post_detect;
1203	}	1242	}
1204		1243
1205	sub detect() {	1244	sub detect() {
		1245	# free some memory
		1246	*detect = sub () { $MODEL };
		1247
		1248	local $!; # for good measure
		1249	local $SIG{__DIE__};
		1250
		1251	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {
		1252	my $model = "AnyEvent::Impl::$1";
		1253	if (eval "require $model") {
		1254	$MODEL = $model;
		1255	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
		1256	} else {
		1257	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;
		1258	}
		1259	}
		1260
		1261	# check for already loaded models
1206	unless ($MODEL) {	1262	unless ($MODEL) {
1207	local $SIG{__DIE__};	1263	for (@REGISTRY, @models) {
1208		1264	my ($package, $model) = @$_;
1209	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	1265	if (${"$package\::VERSION"} > 0) {
1210	my $model = "AnyEvent::Impl::$1";
1211	if (eval "require $model") {	1266	if (eval "require $model") {
1212	$MODEL = $model;	1267	$MODEL = $model;
1213	warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;	1268	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;
1214	} else {	1269	last;
1215	warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;	1270	}
1216	}	1271	}
1217	}	1272	}
1218		1273
1219	# check for already loaded models
1220	unless ($MODEL) {	1274	unless ($MODEL) {
		1275	# try to autoload a model
1221	for (@REGISTRY, @models) {	1276	for (@REGISTRY, @models) {
1222	my ($package, $model) = @$_;	1277	my ($package, $model, $autoload) = @$_;
		1278	if (
		1279	$autoload
		1280	and eval "require $package"
1223	if (${"$package\::VERSION"} > 0) {	1281	and ${"$package\::VERSION"} > 0
1224	if (eval "require $model") {	1282	and eval "require $model"
		1283	) {
1225	$MODEL = $model;	1284	$MODEL = $model;
1226	warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2;	1285	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1227	last;	1286	last;
1228	}
1229	}	1287	}
1230	}	1288	}
1231		1289
1232	unless ($MODEL) {
1233	# try to autoload a model
1234	for (@REGISTRY, @models) {
1235	my ($package, $model, $autoload) = @$_;
1236	if (
1237	$autoload
1238	and eval "require $package"
1239	and ${"$package\::VERSION"} > 0
1240	and eval "require $model"
1241	) {
1242	$MODEL = $model;
1243	warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2;
1244	last;
1245	}
1246	}
1247
1248	$MODEL	1290	$MODEL
1249	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";	1291	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n";
1250	}
1251	}	1292	}
1252
1253	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1254
1255	unshift @ISA, $MODEL;
1256
1257	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};
1258
1259	(shift @post_detect)->() while @post_detect;
1260	}	1293	}
		1294
		1295	@models = (); # free probe data
		1296
		1297	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
		1298	unshift @ISA, $MODEL;
		1299
		1300	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};
		1301
		1302	(shift @post_detect)->() while @post_detect;
1261		1303
1262	$MODEL	1304	$MODEL
1263	}	1305	}
1264		1306
1265	sub AUTOLOAD {	1307	sub AUTOLOAD {
1266	(my $func = $AUTOLOAD) =~ s/.*://;	1308	(my $func = $AUTOLOAD) =~ s/.*://;
1267		1309
1268	$method{$func}	1310	$method{$func}
1269	or Carp::croak "$func: not a valid method for AnyEvent objects";	1311	or Carp::croak "$func: not a valid AnyEvent class method";
1270		1312
1271	detect unless $MODEL;	1313	detect;
1272		1314
1273	my $class = shift;	1315	my $class = shift;
1274	$class->$func (@_);	1316	$class->$func (@_);
1275	}	1317	}
1276		1318
…		…
1343		1385
1344	package AnyEvent::Base;	1386	package AnyEvent::Base;
1345		1387
1346	# default implementations for many methods	1388	# default implementations for many methods
1347		1389
1348	sub _time {	1390	sub _time() {
		1391	eval q{ # poor man's autoloading
1349	# probe for availability of Time::HiRes	1392	# probe for availability of Time::HiRes
1350	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {	1393	if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1351	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;	1394	warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8;
1352	*_time = \&Time::HiRes::time;	1395	*_time = \&Time::HiRes::time;
1353	# if (eval "use POSIX (); (POSIX::times())...	1396	# if (eval "use POSIX (); (POSIX::times())...
1354	} else {	1397	} else {
1355	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;	1398	warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE;
1356	*_time = sub { time }; # epic fail	1399	*_time = sub (){ time }; # epic fail
		1400	}
1357	}	1401	};
		1402	die if $@;
1358		1403
1359	&_time	1404	&_time
1360	}	1405	}
1361		1406
1362	sub time { _time }	1407	sub time { _time }
…		…
1373		1418
1374	our $HAVE_ASYNC_INTERRUPT;	1419	our $HAVE_ASYNC_INTERRUPT;
1375		1420
1376	sub _have_async_interrupt() {	1421	sub _have_async_interrupt() {
1377	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}	1422	$HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT}
1378	&& eval "use Async::Interrupt 1.0 (); 1")	1423	&& eval "use Async::Interrupt 1.02 (); 1")
1379	unless defined $HAVE_ASYNC_INTERRUPT;	1424	unless defined $HAVE_ASYNC_INTERRUPT;
1380		1425
1381	$HAVE_ASYNC_INTERRUPT	1426	$HAVE_ASYNC_INTERRUPT
1382	}	1427	}
1383		1428
1384	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1429	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1385	our (%SIG_ASY, %SIG_ASY_W);	1430	our (%SIG_ASY, %SIG_ASY_W);
1386	our ($SIG_COUNT, $SIG_TW);	1431	our ($SIG_COUNT, $SIG_TW);
1387		1432
1388	sub _signal_exec {
1389	$HAVE_ASYNC_INTERRUPT
1390	? $SIGPIPE_R->drain
1391	: sysread $SIGPIPE_R, my $dummy, 9;
1392
1393	while (%SIG_EV) {
1394	for (keys %SIG_EV) {
1395	delete $SIG_EV{$_};
1396	$_->() for values %{ $SIG_CB{$_} \|\| {} };
1397	}
1398	}
1399	}
1400
1401	# install a dummy wakeup watcher to reduce signal catching latency	1433	# install a dummy wakeup watcher to reduce signal catching latency
		1434	# used by Impls
1402	sub _sig_add() {	1435	sub _sig_add() {
1403	unless ($SIG_COUNT++) {	1436	unless ($SIG_COUNT++) {
1404	# try to align timer on a full-second boundary, if possible	1437	# try to align timer on a full-second boundary, if possible
1405	my $NOW = AE::now;	1438	my $NOW = AE::now;
1406		1439
…		…
1537	# print weird messages, or just unconditionally exit	1570	# print weird messages, or just unconditionally exit
1538	# instead of getting the default action.	1571	# instead of getting the default action.
1539	undef $SIG{$signal}	1572	undef $SIG{$signal}
1540	unless keys %{ $SIG_CB{$signal} };	1573	unless keys %{ $SIG_CB{$signal} };
1541	};	1574	};
		1575
		1576	*_signal_exec = sub {
		1577	$HAVE_ASYNC_INTERRUPT
		1578	? $SIGPIPE_R->drain
		1579	: sysread $SIGPIPE_R, (my $dummy), 9;
		1580
		1581	while (%SIG_EV) {
		1582	for (keys %SIG_EV) {
		1583	delete $SIG_EV{$_};
		1584	$_->() for values %{ $SIG_CB{$_} \|\| {} };
		1585	}
		1586	}
		1587	};
1542	};	1588	};
1543	die if $@;	1589	die if $@;
		1590
1544	&signal	1591	&signal
1545	}	1592	}
1546		1593
1547	# default implementation for ->child	1594	# default implementation for ->child
1548		1595
1549	our %PID_CB;	1596	our %PID_CB;
1550	our $CHLD_W;	1597	our $CHLD_W;
1551	our $CHLD_DELAY_W;	1598	our $CHLD_DELAY_W;
1552	our $WNOHANG;	1599	our $WNOHANG;
1553		1600
		1601	# used by many Impl's
1554	sub _emit_childstatus($$) {	1602	sub _emit_childstatus($$) {
1555	my (undef, $rpid, $rstatus) = @_;	1603	my (undef, $rpid, $rstatus) = @_;
1556		1604
1557	$_->($rpid, $rstatus)	1605	$_->($rpid, $rstatus)
1558	for values %{ $PID_CB{$rpid} \|\| {} },	1606	for values %{ $PID_CB{$rpid} \|\| {} },
1559	values %{ $PID_CB{0} \|\| {} };	1607	values %{ $PID_CB{0} \|\| {} };
1560	}	1608	}
1561		1609
1562	sub _sigchld {
1563	my $pid;
1564
1565	AnyEvent->_emit_childstatus ($pid, $?)
1566	while ($pid = waitpid -1, $WNOHANG) > 0;
1567	}
1568
1569	sub child {	1610	sub child {
		1611	eval q{ # poor man's autoloading {}
		1612	*_sigchld = sub {
		1613	my $pid;
		1614
		1615	AnyEvent->_emit_childstatus ($pid, $?)
		1616	while ($pid = waitpid -1, $WNOHANG) > 0;
		1617	};
		1618
		1619	*child = sub {
1570	my (undef, %arg) = @_;	1620	my (undef, %arg) = @_;
1571		1621
1572	defined (my $pid = $arg{pid} + 0)	1622	defined (my $pid = $arg{pid} + 0)
1573	or Carp::croak "required option 'pid' is missing";	1623	or Carp::croak "required option 'pid' is missing";
1574		1624
1575	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1625	$PID_CB{$pid}{$arg{cb}} = $arg{cb};
1576		1626
1577	# WNOHANG is almost cetrainly 1 everywhere	1627	# WNOHANG is almost cetrainly 1 everywhere
1578	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/	1628	$WNOHANG \|\|= $^O =~ /^(?:openbsd\|netbsd\|linux\|freebsd\|cygwin\|MSWin32)$/
1579	? 1	1629	? 1
1580	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;	1630	: eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
1581		1631
1582	unless ($CHLD_W) {	1632	unless ($CHLD_W) {
1583	$CHLD_W = AE::signal CHLD => \&_sigchld;	1633	$CHLD_W = AE::signal CHLD => \&_sigchld;
1584	# child could be a zombie already, so make at least one round	1634	# child could be a zombie already, so make at least one round
1585	&_sigchld;	1635	&_sigchld;
1586	}	1636	}
1587		1637
1588	bless [$pid, $arg{cb}], "AnyEvent::Base::child"	1638	bless [$pid, $arg{cb}], "AnyEvent::Base::child"
1589	}	1639	};
1590		1640
1591	sub AnyEvent::Base::child::DESTROY {	1641	*AnyEvent::Base::child::DESTROY = sub {
1592	my ($pid, $cb) = @{$_[0]};	1642	my ($pid, $cb) = @{$_[0]};
1593		1643
1594	delete $PID_CB{$pid}{$cb};	1644	delete $PID_CB{$pid}{$cb};
1595	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };	1645	delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1596		1646
1597	undef $CHLD_W unless keys %PID_CB;	1647	undef $CHLD_W unless keys %PID_CB;
		1648	};
		1649	};
		1650	die if $@;
		1651
		1652	&child
1598	}	1653	}
1599		1654
1600	# idle emulation is done by simply using a timer, regardless	1655	# idle emulation is done by simply using a timer, regardless
1601	# of whether the process is idle or not, and not letting	1656	# of whether the process is idle or not, and not letting
1602	# the callback use more than 50% of the time.	1657	# the callback use more than 50% of the time.
1603	sub idle {	1658	sub idle {
		1659	eval q{ # poor man's autoloading {}
		1660	*idle = sub {
1604	my (undef, %arg) = @_;	1661	my (undef, %arg) = @_;
1605		1662
1606	my ($cb, $w, $rcb) = $arg{cb};	1663	my ($cb, $w, $rcb) = $arg{cb};
1607		1664
1608	$rcb = sub {	1665	$rcb = sub {
1609	if ($cb) {	1666	if ($cb) {
1610	$w = _time;	1667	$w = _time;
1611	&$cb;	1668	&$cb;
1612	$w = _time - $w;	1669	$w = _time - $w;
1613		1670
1614	# never use more then 50% of the time for the idle watcher,	1671	# never use more then 50% of the time for the idle watcher,
1615	# within some limits	1672	# within some limits
1616	$w = 0.0001 if $w < 0.0001;	1673	$w = 0.0001 if $w < 0.0001;
1617	$w = 5 if $w > 5;	1674	$w = 5 if $w > 5;
1618		1675
1619	$w = AE::timer $w, 0, $rcb;	1676	$w = AE::timer $w, 0, $rcb;
1620	} else {	1677	} else {
1621	# clean up...	1678	# clean up...
1622	undef $w;	1679	undef $w;
1623	undef $rcb;	1680	undef $rcb;
		1681	}
		1682	};
		1683
		1684	$w = AE::timer 0.05, 0, $rcb;
		1685
		1686	bless \\$cb, "AnyEvent::Base::idle"
1624	}	1687	};
		1688
		1689	*AnyEvent::Base::idle::DESTROY = sub {
		1690	undef $${$_[0]};
		1691	};
1625	};	1692	};
		1693	die if $@;
1626		1694
1627	$w = AE::timer 0.05, 0, $rcb;	1695	&idle
1628
1629	bless \\$cb, "AnyEvent::Base::idle"
1630	}
1631
1632	sub AnyEvent::Base::idle::DESTROY {
1633	undef $${$_[0]};
1634	}	1696	}
1635		1697
1636	package AnyEvent::CondVar;	1698	package AnyEvent::CondVar;
1637		1699
1638	our @ISA = AnyEvent::CondVar::Base::;	1700	our @ISA = AnyEvent::CondVar::Base::;
…		…
1912	warn "read: $input\n"; # output what has been read	1974	warn "read: $input\n"; # output what has been read
1913	$cv->send if $input =~ /^q/i; # quit program if /^q/i	1975	$cv->send if $input =~ /^q/i; # quit program if /^q/i
1914	},	1976	},
1915	);	1977	);
1916		1978
1917	my $time_watcher; # can only be used once
1918
1919	sub new_timer {
1920	$timer = AnyEvent->timer (after => 1, cb => sub {	1979	my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub {
1921	warn "timeout\n"; # print 'timeout' about every second	1980	warn "timeout\n"; # print 'timeout' at most every second
1922	&new_timer; # and restart the time
1923	});	1981	});
1924	}
1925
1926	new_timer; # create first timer
1927		1982
1928	$cv->recv; # wait until user enters /^q/i	1983	$cv->recv; # wait until user enters /^q/i
1929		1984
1930	=head1 REAL-WORLD EXAMPLE	1985	=head1 REAL-WORLD EXAMPLE
1931		1986
…		…
2375	As you can see, the AnyEvent + EV combination even beats the	2430	As you can see, the AnyEvent + EV combination even beats the
2376	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl	2431	hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl
2377	backend easily beats IO::Lambda and POE.	2432	backend easily beats IO::Lambda and POE.
2378		2433
2379	And even the 100% non-blocking version written using the high-level (and	2434	And even the 100% non-blocking version written using the high-level (and
2380	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a	2435	slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda
2381	large margin, even though it does all of DNS, tcp-connect and socket I/O	2436	higher level ("unoptimised") abstractions by a large margin, even though
2382	in a non-blocking way.	2437	it does all of DNS, tcp-connect and socket I/O in a non-blocking way.
2383		2438
2384	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and	2439	The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and
2385	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are	2440	F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are
2386	part of the IO::lambda distribution and were used without any changes.	2441	part of the IO::Lambda distribution and were used without any changes.
2387		2442
2388		2443
2389	=head1 SIGNALS	2444	=head1 SIGNALS
2390		2445
2391	AnyEvent currently installs handlers for these signals:	2446	AnyEvent currently installs handlers for these signals:
…		…
2433	it's built-in modules) are required to use it.	2488	it's built-in modules) are required to use it.
2434		2489
2435	That does not mean that AnyEvent won't take advantage of some additional	2490	That does not mean that AnyEvent won't take advantage of some additional
2436	modules if they are installed.	2491	modules if they are installed.
2437		2492
2438	This section epxlains which additional modules will be used, and how they	2493	This section explains which additional modules will be used, and how they
2439	affect AnyEvent's operetion.	2494	affect AnyEvent's operation.
2440		2495
2441	=over 4	2496	=over 4
2442		2497
2443	=item L<Async::Interrupt>	2498	=item L<Async::Interrupt>
2444		2499
…		…
2449	catch the signals) with some delay (default is 10 seconds, look for	2504	catch the signals) with some delay (default is 10 seconds, look for
2450	C<$AnyEvent::MAX_SIGNAL_LATENCY>).	2505	C<$AnyEvent::MAX_SIGNAL_LATENCY>).
2451		2506
2452	If this module is available, then it will be used to implement signal	2507	If this module is available, then it will be used to implement signal
2453	catching, which means that signals will not be delayed, and the event loop	2508	catching, which means that signals will not be delayed, and the event loop
2454	will not be interrupted regularly, which is more efficient (And good for	2509	will not be interrupted regularly, which is more efficient (and good for
2455	battery life on laptops).	2510	battery life on laptops).
2456		2511
2457	This affects not just the pure-perl event loop, but also other event loops	2512	This affects not just the pure-perl event loop, but also other event loops
2458	that have no signal handling on their own (e.g. Glib, Tk, Qt).	2513	that have no signal handling on their own (e.g. Glib, Tk, Qt).
2459		2514
…		…
2480	lot less memory), but otherwise doesn't affect guard operation much. It is	2535	lot less memory), but otherwise doesn't affect guard operation much. It is
2481	purely used for performance.	2536	purely used for performance.
2482		2537
2483	=item L<JSON> and L<JSON::XS>	2538	=item L<JSON> and L<JSON::XS>
2484		2539
2485	This module is required when you want to read or write JSON data via	2540	One of these modules is required when you want to read or write JSON data
2486	L<AnyEvent::Handle>. It is also written in pure-perl, but can take	2541	via L<AnyEvent::Handle>. It is also written in pure-perl, but can take
2487	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.	2542	advantage of the ultra-high-speed L<JSON::XS> module when it is installed.
2488		2543
2489	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is	2544	In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is
2490	installed.	2545	installed.
2491		2546
…		…
2506		2561
2507		2562
2508	=head1 FORK	2563	=head1 FORK
2509		2564
2510	Most event libraries are not fork-safe. The ones who are usually are	2565	Most event libraries are not fork-safe. The ones who are usually are
2511	because they rely on inefficient but fork-safe C<select> or C<poll>	2566	because they rely on inefficient but fork-safe C<select> or C<poll> calls
2512	calls. Only L<EV> is fully fork-aware.	2567	- higher performance APIs such as BSD's kqueue or the dreaded Linux epoll
		2568	are usually badly thought-out hacks that are incompatible with fork in
		2569	one way or another. Only L<EV> is fully fork-aware and ensures that you
		2570	continue event-processing in both parent and child (or both, if you know
		2571	what you are doing).
		2572
		2573	This means that, in general, you cannot fork and do event processing in
		2574	the child if the event library was initialised before the fork (which
		2575	usually happens when the first AnyEvent watcher is created, or the library
		2576	is loaded).
2513		2577
2514	If you have to fork, you must either do so I<before> creating your first	2578	If you have to fork, you must either do so I<before> creating your first
2515	watcher OR you must not use AnyEvent at all in the child OR you must do	2579	watcher OR you must not use AnyEvent at all in the child OR you must do
2516	something completely out of the scope of AnyEvent.	2580	something completely out of the scope of AnyEvent.
		2581
		2582	The problem of doing event processing in the parent I<and> the child
		2583	is much more complicated: even for backends that I<are> fork-aware or
		2584	fork-safe, their behaviour is not usually what you want: fork clones all
		2585	watchers, that means all timers, I/O watchers etc. are active in both
		2586	parent and child, which is almost never what you want. USing C<exec>
		2587	to start worker children from some kind of manage rprocess is usually
		2588	preferred, because it is much easier and cleaner, at the expense of having
		2589	to have another binary.
2517		2590
2518		2591
2519	=head1 SECURITY CONSIDERATIONS	2592	=head1 SECURITY CONSIDERATIONS
2520		2593
2521	AnyEvent can be forced to load any event model via	2594	AnyEvent can be forced to load any event model via

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.281 by root, Mon Aug 10 01:17:38 2009 UTC vs. Revision 1.312 by root, Mon Feb 15 18:02:35 2010 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.281 by root, Mon Aug 10 01:17:38 2009 UTC vs.
Revision 1.312 by root, Mon Feb 15 18:02:35 2010 UTC