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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.261 by root, Tue Jul 28 12:56:17 2009 UTC vs.
Revision 1.266 by root, Thu Jul 30 03:41:56 2009 UTC

…		…
181	my variables are only visible after the statement in which they are	181	my variables are only visible after the statement in which they are
182	declared.	182	declared.
183		183
184	=head2 I/O WATCHERS	184	=head2 I/O WATCHERS
185		185
		186	$w = AnyEvent->io (
		187	fh => <filehandle_or_fileno>,
		188	poll => <"r" or "w">,
		189	cb => <callback>,
		190	);
		191
186	You can create an I/O watcher by calling the C<< AnyEvent->io >> method	192	You can create an I/O watcher by calling the C<< AnyEvent->io >> method
187	with the following mandatory key-value pairs as arguments:	193	with the following mandatory key-value pairs as arguments:
188		194
189	C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch	195	C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch
190	for events (AnyEvent might or might not keep a reference to this file	196	for events (AnyEvent might or might not keep a reference to this file
…		…
219	undef $w;	225	undef $w;
220	});	226	});
221		227
222	=head2 TIME WATCHERS	228	=head2 TIME WATCHERS
223		229
		230	$w = AnyEvent->timer (after => <seconds>, cb => <callback>);
		231
		232	$w = AnyEvent->timer (
		233	after => <fractional_seconds>,
		234	interval => <fractional_seconds>,
		235	cb => <callback>,
		236	);
		237
224	You can create a time watcher by calling the C<< AnyEvent->timer >>	238	You can create a time watcher by calling the C<< AnyEvent->timer >>
225	method with the following mandatory arguments:	239	method with the following mandatory arguments:
226		240
227	C<after> specifies after how many seconds (fractional values are	241	C<after> specifies after how many seconds (fractional values are
228	supported) the callback should be invoked. C<cb> is the callback to invoke	242	supported) the callback should be invoked. C<cb> is the callback to invoke
…		…
354	Note that updating the time I<might> cause some events to be handled.	368	Note that updating the time I<might> cause some events to be handled.
355		369
356	=back	370	=back
357		371
358	=head2 SIGNAL WATCHERS	372	=head2 SIGNAL WATCHERS
		373
		374	$w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>);
359		375
360	You can watch for signals using a signal watcher, C<signal> is the signal	376	You can watch for signals using a signal watcher, C<signal> is the signal
361	I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl	377	I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl
362	callback to be invoked whenever a signal occurs.	378	callback to be invoked whenever a signal occurs.
363		379
…		…
397	event loops such as L<Event> or L<Event::Lib> (and not with L<POE>	413	event loops such as L<Event> or L<Event::Lib> (and not with L<POE>
398	currently, as POE does it's own workaround with one-second latency). With	414	currently, as POE does it's own workaround with one-second latency). With
399	those, you just have to suffer the delays.	415	those, you just have to suffer the delays.
400		416
401	=head2 CHILD PROCESS WATCHERS	417	=head2 CHILD PROCESS WATCHERS
		418
		419	$w = AnyEvent->child (pid => <process id>, cb => <callback>);
402		420
403	You can also watch on a child process exit and catch its exit status.	421	You can also watch on a child process exit and catch its exit status.
404		422
405	The child process is specified by the C<pid> argument (one some backends,	423	The child process is specified by the C<pid> argument (one some backends,
406	using C<0> watches for any child process exit, on others this will	424	using C<0> watches for any child process exit, on others this will
…		…
455	# do something else, then wait for process exit	473	# do something else, then wait for process exit
456	$done->recv;	474	$done->recv;
457		475
458	=head2 IDLE WATCHERS	476	=head2 IDLE WATCHERS
459		477
		478	$w = AnyEvent->idle (cb => <callback>);
		479
460	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
461	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
462	"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
463	attention by the event loop".	483	attention by the event loop".
464		484
…		…
489	}	509	}
490	});	510	});
491	});	511	});
492		512
493	=head2 CONDITION VARIABLES	513	=head2 CONDITION VARIABLES
		514
		515	$cv = AnyEvent->condvar;
		516
		517	$cv->send (<list>);
		518	my @res = $cv->recv;
494		519
495	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
496	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
497	will actively watch for new events and call your callbacks.	522	will actively watch for new events and call your callbacks.
498		523
…		…
1289	}	1314	}
1290		1315
1291	# default implementation for ->signal	1316	# default implementation for ->signal
1292		1317
1293	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	$HAVE_ASYNC_INTERRUPT
		1326	}
		1327
1294	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);	1328	our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO);
1295	our (%SIG_ASY, %SIG_ASY_W);	1329	our (%SIG_ASY, %SIG_ASY_W);
1296	our ($SIG_COUNT, $SIG_TW);	1330	our ($SIG_COUNT, $SIG_TW);
1297		1331
1298	sub _signal_exec {	1332	sub _signal_exec {
…		…
1325	sub _sig_del {	1359	sub _sig_del {
1326	undef $SIG_TW	1360	undef $SIG_TW
1327	unless --$SIG_COUNT;	1361	unless --$SIG_COUNT;
1328	}	1362	}
1329		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
1330	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 {
1331	my (undef, %arg) = @_;	1432	my (undef, %arg) = @_;
1332		1433
1333	my $signal = uc $arg{signal}	1434	my $signal = uc $arg{signal}
1334	or Carp::croak "required option 'signal' is missing";	1435	or Carp::croak "required option 'signal' is missing";
1335		1436
1336	if ($HAVE_ASYNC_INTERRUPT) {	1437	if ($HAVE_ASYNC_INTERRUPT) {
1337	# async::interrupt	1438	# async::interrupt
1338		1439
1339	$signal = Async::Interrupt::sig2num ($signal);	1440	$signal = sig2num $signal;
1340	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1441	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1341		1442
1342	$SIG_ASY{$signal} \|\|= do {	1443	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1343	my $asy = new Async::Interrupt
1344	cb => sub { undef $SIG_EV{$signal} },	1444	cb => sub { undef $SIG_EV{$signal} },
1345	signal => $signal,	1445	signal => $signal,
1346	pipe => [$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;
1347	;	1466	}
1348	$asy->pipe_autodrain (0);
1349		1467
1350	$asy	1468	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1351	};	1469	};
1352		1470
1353	} else {	1471	*AnyEvent::Base::signal::DESTROY = sub {
1354	# pure perl	1472	my ($signal, $cb) = @{$_[0]};
1355		1473
1356	# AE::Util has been loaded in signal	1474	_sig_del;
1357	$signal = AnyEvent::Util::sig2name ($signal);
1358	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1359		1475
1360	$SIG{$signal} \|\|= sub {	1476	delete $SIG_CB{$signal}{$cb};
1361	local $!;	1477
1362	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	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.
1363	undef $SIG_EV{$signal};	1483	undef $SIG{$signal}
		1484	unless keys %{ $SIG_CB{$signal} };
1364	};	1485	};
1365
1366	# can't do signal processing without introducing races in pure perl,
1367	# so limit the signal latency.
1368	_sig_add;
1369	}	1486	};
1370		1487	die if $@;
1371	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1372	}
1373
1374	sub signal {
1375	# probe for availability of Async::Interrupt
1376	if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 1.0 (); 1") {
1377	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;
1378
1379	$HAVE_ASYNC_INTERRUPT = 1;
1380	$SIGPIPE_R = new Async::Interrupt::EventPipe;
1381	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);
1382
1383	} else {
1384	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1385
1386	require Fcntl;
1387
1388	if (AnyEvent::WIN32) {
1389	require AnyEvent::Util;
1390
1391	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1392	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1393	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1394	} else {
1395	pipe $SIGPIPE_R, $SIGPIPE_W;
1396	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1397	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1398
1399	# not strictly required, as $^F is normally 2, but let's make sure...
1400	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1401	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1402	}
1403
1404	$SIGPIPE_R
1405	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1406
1407	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1408	}
1409
1410	*signal = \&_signal;
1411	&signal	1488	&signal
1412	}
1413
1414	sub AnyEvent::Base::signal::DESTROY {
1415	my ($signal, $cb) = @{$_[0]};
1416
1417	_sig_del;
1418
1419	delete $SIG_CB{$signal}{$cb};
1420
1421	$HAVE_ASYNC_INTERRUPT
1422	? delete $SIG_ASY{$signal}
1423	: # delete doesn't work with older perls - they then
1424	# print weird messages, or just unconditionally exit
1425	# instead of getting the default action.
1426	undef $SIG{$signal}
1427	unless keys %{ $SIG_CB{$signal} };
1428	}	1489	}
1429		1490
1430	# default implementation for ->child	1491	# default implementation for ->child
1431		1492
1432	our %PID_CB;	1493	our %PID_CB;
…		…
1586	}	1647	}
1587		1648
1588	# undocumented/compatibility with pre-3.4	1649	# undocumented/compatibility with pre-3.4
1589	*broadcast = \&send;	1650	*broadcast = \&send;
1590	*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	}
1591		1694
1592	=head1 ERROR AND EXCEPTION HANDLING	1695	=head1 ERROR AND EXCEPTION HANDLING
1593		1696
1594	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
1595	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

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.261 by root, Tue Jul 28 12:56:17 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 1.261 by root, Tue Jul 28 12:56:17 2009 UTC vs.
Revision 1.266 by root, Thu Jul 30 03:41:56 2009 UTC