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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.264 by root, Wed Jul 29 12:42:09 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
…		…
1335	undef $SIG_TW	1360	undef $SIG_TW
1336	unless --$SIG_COUNT;	1361	unless --$SIG_COUNT;
1337	}	1362	}
1338		1363
1339	our $_sig_name_init; $_sig_name_init = sub {	1364	our $_sig_name_init; $_sig_name_init = sub {
		1365	eval q{ # poor man's autoloading
1340	undef $_sig_name_init;	1366	undef $_sig_name_init;
1341		1367
1342	if (_have_async_interrupt) {	1368	if (_have_async_interrupt) {
1343	*sig2num = \&Async::Interrupt::sig2num;	1369	*sig2num = \&Async::Interrupt::sig2num;
1344	*sig2name = \&Async::Interrupt::sig2name;	1370	*sig2name = \&Async::Interrupt::sig2name;
1345	} else {	1371	} else {
1346	require Config;	1372	require Config;
1347		1373
1348	my %signame2num;	1374	my %signame2num;
1349	@signame2num{ split ' ', $Config::Config{sig_name} }	1375	@signame2num{ split ' ', $Config::Config{sig_name} }
1350	= split ' ', $Config::Config{sig_num};	1376	= split ' ', $Config::Config{sig_num};
1351		1377
1352	my @signum2name;	1378	my @signum2name;
1353	@signum2name[values %signame2num] = keys %signame2num;	1379	@signum2name[values %signame2num] = keys %signame2num;
1354		1380
1355	*sig2num = sub($) {	1381	*sig2num = sub($) {
1356	$_[0] > 0 ? shift : $signame2num{+shift}	1382	$_[0] > 0 ? shift : $signame2num{+shift}
1357	};	1383	};
1358	*sig2name = sub ($) {	1384	*sig2name = sub ($) {
1359	$_[0] > 0 ? $signum2name[+shift] : shift	1385	$_[0] > 0 ? $signum2name[+shift] : shift
		1386	};
1360	};	1387	}
1361	}	1388	};
		1389	die if $@;
1362	};	1390	};
1363		1391
1364	sub sig2num ($) { &$_sig_name_init; &sig2num }	1392	sub sig2num ($) { &$_sig_name_init; &sig2num }
1365	sub sig2name($) { &$_sig_name_init; &sig2name }	1393	sub sig2name($) { &$_sig_name_init; &sig2name }
1366		1394
1367	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 {
1368	my (undef, %arg) = @_;	1432	my (undef, %arg) = @_;
1369		1433
1370	my $signal = uc $arg{signal}	1434	my $signal = uc $arg{signal}
1371	or Carp::croak "required option 'signal' is missing";	1435	or Carp::croak "required option 'signal' is missing";
1372		1436
1373	if ($HAVE_ASYNC_INTERRUPT) {	1437	if ($HAVE_ASYNC_INTERRUPT) {
1374	# async::interrupt	1438	# async::interrupt
1375		1439
1376	$signal = sig2num $signal;	1440	$signal = sig2num $signal;
1377	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1441	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1378		1442
1379	$SIG_ASY{$signal} \|\|= new Async::Interrupt	1443	$SIG_ASY{$signal} \|\|= new Async::Interrupt
1380	cb => sub { undef $SIG_EV{$signal} },	1444	cb => sub { undef $SIG_EV{$signal} },
1381	signal => $signal,	1445	signal => $signal,
1382	pipe => [$SIGPIPE_R->filenos],	1446	pipe => [$SIGPIPE_R->filenos],
1383	pipe_autodrain => 0,	1447	pipe_autodrain => 0,
1384	;	1448	;
1385		1449
1386	} else {	1450	} else {
1387	# pure perl	1451	# pure perl
1388		1452
1389	# AE::Util has been loaded in signal	1453	# AE::Util has been loaded in signal
1390	$signal = sig2name $signal;	1454	$signal = sig2name $signal;
1391	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};	1455	$SIG_CB{$signal}{$arg{cb}} = $arg{cb};
1392		1456
1393	$SIG{$signal} \|\|= sub {	1457	$SIG{$signal} \|\|= sub {
1394	local $!;	1458	local $!;
1395	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;	1459	syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
1396	undef $SIG_EV{$signal};	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;
		1466	}
		1467
		1468	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"
1397	};	1469	};
1398		1470
1399	# can't do signal processing without introducing races in pure perl,	1471	*AnyEvent::Base::signal::DESTROY = sub {
1400	# so limit the signal latency.	1472	my ($signal, $cb) = @{$_[0]};
		1473
1401	_sig_add;	1474	_sig_del;
1402	}
1403		1475
1404	bless [$signal, $arg{cb}], "AnyEvent::Base::signal"	1476	delete $SIG_CB{$signal}{$cb};
1405	}
1406		1477
1407	sub signal {	1478	$HAVE_ASYNC_INTERRUPT
1408	# probe for availability of Async::Interrupt	1479	? delete $SIG_ASY{$signal}
1409	if (_have_async_interrupt) {	1480	: # delete doesn't work with older perls - they then
1410	warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8;	1481	# print weird messages, or just unconditionally exit
1411		1482	# instead of getting the default action.
1412	$SIGPIPE_R = new Async::Interrupt::EventPipe;	1483	undef $SIG{$signal}
1413	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec);	1484	unless keys %{ $SIG_CB{$signal} };
1414
1415	} else {
1416	warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8;
1417
1418	require Fcntl;
1419
1420	if (AnyEvent::WIN32) {
1421	require AnyEvent::Util;
1422
1423	($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
1424	AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R;
1425	AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case
1426	} else {
1427	pipe $SIGPIPE_R, $SIGPIPE_W;
1428	fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R;
1429	fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case
1430
1431	# not strictly required, as $^F is normally 2, but let's make sure...
1432	fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1433	fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC;
1434	}	1485	};
1435
1436	$SIGPIPE_R
1437	or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n";
1438
1439	$SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec);
1440	}	1486	};
1441		1487	die if $@;
1442	*signal = \&_signal;
1443	&signal	1488	&signal
1444	}
1445
1446	sub AnyEvent::Base::signal::DESTROY {
1447	my ($signal, $cb) = @{$_[0]};
1448
1449	_sig_del;
1450
1451	delete $SIG_CB{$signal}{$cb};
1452
1453	$HAVE_ASYNC_INTERRUPT
1454	? delete $SIG_ASY{$signal}
1455	: # delete doesn't work with older perls - they then
1456	# print weird messages, or just unconditionally exit
1457	# instead of getting the default action.
1458	undef $SIG{$signal}
1459	unless keys %{ $SIG_CB{$signal} };
1460	}	1489	}
1461		1490
1462	# default implementation for ->child	1491	# default implementation for ->child
1463		1492
1464	our %PID_CB;	1493	our %PID_CB;
…		…
1618	}	1647	}
1619		1648
1620	# undocumented/compatibility with pre-3.4	1649	# undocumented/compatibility with pre-3.4
1621	*broadcast = \&send;	1650	*broadcast = \&send;
1622	*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	}
1623		1694
1624	=head1 ERROR AND EXCEPTION HANDLING	1695	=head1 ERROR AND EXCEPTION HANDLING
1625		1696
1626	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
1627	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 1.264 by root, Wed Jul 29 12:42:09 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 1.264 by root, Wed Jul 29 12:42:09 2009 UTC vs.
Revision 1.266 by root, Thu Jul 30 03:41:56 2009 UTC