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

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.135 by root, Sun May 25 04:49:01 2008 UTC vs.
Revision 1.168 by root, Tue Jul 8 23:53:37 2008 UTC

…		…
1	=head1 => NAME	1	=head1 NAME
2		2
3	AnyEvent - provide framework for multiple event loops	3	AnyEvent - provide framework for multiple event loops
4		4
5	EV, Event, Glib, Tk, Perl, Event::Lib, Qt, POE - various supported event loops	5	EV, Event, Glib, Tk, Perl, Event::Lib, Qt, POE - various supported event loops
6		6
18		18
19	my $w = AnyEvent->condvar; # stores whether a condition was flagged	19	my $w = AnyEvent->condvar; # stores whether a condition was flagged
20	$w->send; # wake up current and all future recv's	20	$w->send; # wake up current and all future recv's
21	$w->recv; # enters "main loop" till $condvar gets ->send	21	$w->recv; # enters "main loop" till $condvar gets ->send
22		22
		23	=head1 INTRODUCTION/TUTORIAL
		24
		25	This manpage is mainly a reference manual. If you are interested
		26	in a tutorial or some gentle introduction, have a look at the
		27	L<AnyEvent::Intro> manpage.
		28
23	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)	29	=head1 WHY YOU SHOULD USE THIS MODULE (OR NOT)
24		30
25	Glib, POE, IO::Async, Event... CPAN offers event models by the dozen	31	Glib, POE, IO::Async, Event... CPAN offers event models by the dozen
26	nowadays. So what is different about AnyEvent?	32	nowadays. So what is different about AnyEvent?
27		33
28	Executive Summary: AnyEvent is I<compatible>, AnyEvent is I<free of	34	Executive Summary: AnyEvent is I<compatible>, AnyEvent is I<free of
29	policy> and AnyEvent is I<small and efficient>.	35	policy> and AnyEvent is I<small and efficient>.
30		36
31	First and foremost, I<AnyEvent is not an event model> itself, it only	37	First and foremost, I<AnyEvent is not an event model> itself, it only
32	interfaces to whatever event model the main program happens to use in a	38	interfaces to whatever event model the main program happens to use, in a
33	pragmatic way. For event models and certain classes of immortals alike,	39	pragmatic way. For event models and certain classes of immortals alike,
34	the statement "there can only be one" is a bitter reality: In general,	40	the statement "there can only be one" is a bitter reality: In general,
35	only one event loop can be active at the same time in a process. AnyEvent	41	only one event loop can be active at the same time in a process. AnyEvent
36	helps hiding the differences between those event loops.	42	cannot change this, but it can hide the differences between those event
		43	loops.
37		44
38	The goal of AnyEvent is to offer module authors the ability to do event	45	The goal of AnyEvent is to offer module authors the ability to do event
39	programming (waiting for I/O or timer events) without subscribing to a	46	programming (waiting for I/O or timer events) without subscribing to a
40	religion, a way of living, and most importantly: without forcing your	47	religion, a way of living, and most importantly: without forcing your
41	module users into the same thing by forcing them to use the same event	48	module users into the same thing by forcing them to use the same event
42	model you use.	49	model you use.
43		50
44	For modules like POE or IO::Async (which is a total misnomer as it is	51	For modules like POE or IO::Async (which is a total misnomer as it is
45	actually doing all I/O I<synchronously>...), using them in your module is	52	actually doing all I/O I<synchronously>...), using them in your module is
46	like joining a cult: After you joined, you are dependent on them and you	53	like joining a cult: After you joined, you are dependent on them and you
47	cannot use anything else, as it is simply incompatible to everything that	54	cannot use anything else, as they are simply incompatible to everything
48	isn't itself. What's worse, all the potential users of your module are	55	that isn't them. What's worse, all the potential users of your
49	I<also> forced to use the same event loop you use.	56	module are I<also> forced to use the same event loop you use.
50		57
51	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works	58	AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works
52	fine. AnyEvent + Tk works fine etc. etc. but none of these work together	59	fine. AnyEvent + Tk works fine etc. etc. but none of these work together
53	with the rest: POE + IO::Async? no go. Tk + Event? no go. Again: if	60	with the rest: POE + IO::Async? No go. Tk + Event? No go. Again: if
54	your module uses one of those, every user of your module has to use it,	61	your module uses one of those, every user of your module has to use it,
55	too. But if your module uses AnyEvent, it works transparently with all	62	too. But if your module uses AnyEvent, it works transparently with all
56	event models it supports (including stuff like POE and IO::Async, as long	63	event models it supports (including stuff like IO::Async, as long as those
57	as those use one of the supported event loops. It is trivial to add new	64	use one of the supported event loops. It is trivial to add new event loops
58	event loops to AnyEvent, too, so it is future-proof).	65	to AnyEvent, too, so it is future-proof).
59		66
60	In addition to being free of having to use I<the one and only true event	67	In addition to being free of having to use I<the one and only true event
61	model>, AnyEvent also is free of bloat and policy: with POE or similar	68	model>, AnyEvent also is free of bloat and policy: with POE or similar
62	modules, you get an enormous amount of code and strict rules you have to	69	modules, you get an enormous amount of code and strict rules you have to
63	follow. AnyEvent, on the other hand, is lean and up to the point, by only	70	follow. AnyEvent, on the other hand, is lean and up to the point, by only
64	offering the functionality that is necessary, in as thin as a wrapper as	71	offering the functionality that is necessary, in as thin as a wrapper as
65	technically possible.	72	technically possible.
66		73
		74	Of course, AnyEvent comes with a big (and fully optional!) toolbox
		75	of useful functionality, such as an asynchronous DNS resolver, 100%
		76	non-blocking connects (even with TLS/SSL, IPv6 and on broken platforms
		77	such as Windows) and lots of real-world knowledge and workarounds for
		78	platform bugs and differences.
		79
67	Of course, if you want lots of policy (this can arguably be somewhat	80	Now, if you I<do want> lots of policy (this can arguably be somewhat
68	useful) and you want to force your users to use the one and only event	81	useful) and you want to force your users to use the one and only event
69	model, you should I<not> use this module.	82	model, you should I<not> use this module.
70		83
71	=head1 DESCRIPTION	84	=head1 DESCRIPTION
72		85
…		…
102	starts using it, all bets are off. Maybe you should tell their authors to	115	starts using it, all bets are off. Maybe you should tell their authors to
103	use AnyEvent so their modules work together with others seamlessly...	116	use AnyEvent so their modules work together with others seamlessly...
104		117
105	The pure-perl implementation of AnyEvent is called	118	The pure-perl implementation of AnyEvent is called
106	C<AnyEvent::Impl::Perl>. Like other event modules you can load it	119	C<AnyEvent::Impl::Perl>. Like other event modules you can load it
107	explicitly.	120	explicitly and enjoy the high availability of that event loop :)
108		121
109	=head1 WATCHERS	122	=head1 WATCHERS
110		123
111	AnyEvent has the central concept of a I<watcher>, which is an object that	124	AnyEvent has the central concept of a I<watcher>, which is an object that
112	stores relevant data for each kind of event you are waiting for, such as	125	stores relevant data for each kind of event you are waiting for, such as
…		…
126	Many watchers either are used with "recursion" (repeating timers for	139	Many watchers either are used with "recursion" (repeating timers for
127	example), or need to refer to their watcher object in other ways.	140	example), or need to refer to their watcher object in other ways.
128		141
129	An any way to achieve that is this pattern:	142	An any way to achieve that is this pattern:
130		143
131	my $w; $w = AnyEvent->type (arg => value ..., cb => sub {	144	my $w; $w = AnyEvent->type (arg => value ..., cb => sub {
132	# you can use $w here, for example to undef it	145	# you can use $w here, for example to undef it
133	undef $w;	146	undef $w;
134	});	147	});
135		148
136	Note that C<my $w; $w => combination. This is necessary because in Perl,	149	Note that C<my $w; $w => combination. This is necessary because in Perl,
137	my variables are only visible after the statement in which they are	150	my variables are only visible after the statement in which they are
138	declared.	151	declared.
139		152
140	=head2 I/O WATCHERS	153	=head2 I/O WATCHERS
141		154
142	You can create an I/O watcher by calling the C<< AnyEvent->io >> method	155	You can create an I/O watcher by calling the C<< AnyEvent->io >> method
143	with the following mandatory key-value pairs as arguments:	156	with the following mandatory key-value pairs as arguments:
144		157
145	C<fh> the Perl I<file handle> (I<not> file descriptor) to watch	158	C<fh> the Perl I<file handle> (I<not> file descriptor) to watch for events
146	for events. C<poll> must be a string that is either C<r> or C<w>,	159	(AnyEvent might or might not keep a reference to this file handle). C<poll>
147	which creates a watcher waiting for "r"eadable or "w"ritable events,	160	must be a string that is either C<r> or C<w>, which creates a watcher
148	respectively. C<cb> is the callback to invoke each time the file handle	161	waiting for "r"eadable or "w"ritable events, respectively. C<cb> is the
149	becomes ready.	162	callback to invoke each time the file handle becomes ready.
150		163
151	Although the callback might get passed parameters, their value and	164	Although the callback might get passed parameters, their value and
152	presence is undefined and you cannot rely on them. Portable AnyEvent	165	presence is undefined and you cannot rely on them. Portable AnyEvent
153	callbacks cannot use arguments passed to I/O watcher callbacks.	166	callbacks cannot use arguments passed to I/O watcher callbacks.
154		167
…		…
158		171
159	Some event loops issue spurious readyness notifications, so you should	172	Some event loops issue spurious readyness notifications, so you should
160	always use non-blocking calls when reading/writing from/to your file	173	always use non-blocking calls when reading/writing from/to your file
161	handles.	174	handles.
162		175
163	Example:
164
165	# wait for readability of STDIN, then read a line and disable the watcher	176	Example: wait for readability of STDIN, then read a line and disable the
		177	watcher.
		178
166	my $w; $w = AnyEvent->io (fh => \*STDIN, poll => 'r', cb => sub {	179	my $w; $w = AnyEvent->io (fh => \*STDIN, poll => 'r', cb => sub {
167	chomp (my $input = <STDIN>);	180	chomp (my $input = <STDIN>);
168	warn "read: $input\n";	181	warn "read: $input\n";
169	undef $w;	182	undef $w;
170	});	183	});
…		…
180		193
181	Although the callback might get passed parameters, their value and	194	Although the callback might get passed parameters, their value and
182	presence is undefined and you cannot rely on them. Portable AnyEvent	195	presence is undefined and you cannot rely on them. Portable AnyEvent
183	callbacks cannot use arguments passed to time watcher callbacks.	196	callbacks cannot use arguments passed to time watcher callbacks.
184		197
185	The timer callback will be invoked at most once: if you want a repeating	198	The callback will normally be invoked once only. If you specify another
186	timer you have to create a new watcher (this is a limitation by both Tk	199	parameter, C<interval>, as a strictly positive number (> 0), then the
187	and Glib).	200	callback will be invoked regularly at that interval (in fractional
		201	seconds) after the first invocation. If C<interval> is specified with a
		202	false value, then it is treated as if it were missing.
188		203
189	Example:	204	The callback will be rescheduled before invoking the callback, but no
		205	attempt is done to avoid timer drift in most backends, so the interval is
		206	only approximate.
190		207
191	# fire an event after 7.7 seconds	208	Example: fire an event after 7.7 seconds.
		209
192	my $w = AnyEvent->timer (after => 7.7, cb => sub {	210	my $w = AnyEvent->timer (after => 7.7, cb => sub {
193	warn "timeout\n";	211	warn "timeout\n";
194	});	212	});
195		213
196	# to cancel the timer:	214	# to cancel the timer:
197	undef $w;	215	undef $w;
198		216
199	Example 2:
200
201	# fire an event after 0.5 seconds, then roughly every second	217	Example 2: fire an event after 0.5 seconds, then roughly every second.
202	my $w;
203		218
204	my $cb = sub {
205	# cancel the old timer while creating a new one
206	$w = AnyEvent->timer (after => 1, cb => $cb);	219	my $w = AnyEvent->timer (after => 0.5, interval => 1, cb => sub {
		220	warn "timeout\n";
207	};	221	};
208
209	# start the "loop" by creating the first watcher
210	$w = AnyEvent->timer (after => 0.5, cb => $cb);
211		222
212	=head3 TIMING ISSUES	223	=head3 TIMING ISSUES
213		224
214	There are two ways to handle timers: based on real time (relative, "fire	225	There are two ways to handle timers: based on real time (relative, "fire
215	in 10 seconds") and based on wallclock time (absolute, "fire at 12	226	in 10 seconds") and based on wallclock time (absolute, "fire at 12
…		…
227	timers.	238	timers.
228		239
229	AnyEvent always prefers relative timers, if available, matching the	240	AnyEvent always prefers relative timers, if available, matching the
230	AnyEvent API.	241	AnyEvent API.
231		242
		243	AnyEvent has two additional methods that return the "current time":
		244
		245	=over 4
		246
		247	=item AnyEvent->time
		248
		249	This returns the "current wallclock time" as a fractional number of
		250	seconds since the Epoch (the same thing as C<time> or C<Time::HiRes::time>
		251	return, and the result is guaranteed to be compatible with those).
		252
		253	It progresses independently of any event loop processing, i.e. each call
		254	will check the system clock, which usually gets updated frequently.
		255
		256	=item AnyEvent->now
		257
		258	This also returns the "current wallclock time", but unlike C<time>, above,
		259	this value might change only once per event loop iteration, depending on
		260	the event loop (most return the same time as C<time>, above). This is the
		261	time that AnyEvent's timers get scheduled against.
		262
		263	I<In almost all cases (in all cases if you don't care), this is the
		264	function to call when you want to know the current time.>
		265
		266	This function is also often faster then C<< AnyEvent->time >>, and
		267	thus the preferred method if you want some timestamp (for example,
		268	L<AnyEvent::Handle> uses this to update it's activity timeouts).
		269
		270	The rest of this section is only of relevance if you try to be very exact
		271	with your timing, you can skip it without bad conscience.
		272
		273	For a practical example of when these times differ, consider L<Event::Lib>
		274	and L<EV> and the following set-up:
		275
		276	The event loop is running and has just invoked one of your callback at
		277	time=500 (assume no other callbacks delay processing). In your callback,
		278	you wait a second by executing C<sleep 1> (blocking the process for a
		279	second) and then (at time=501) you create a relative timer that fires
		280	after three seconds.
		281
		282	With L<Event::Lib>, C<< AnyEvent->time >> and C<< AnyEvent->now >> will
		283	both return C<501>, because that is the current time, and the timer will
		284	be scheduled to fire at time=504 (C<501> + C<3>).
		285
		286	With L<EV>, C<< AnyEvent->time >> returns C<501> (as that is the current
		287	time), but C<< AnyEvent->now >> returns C<500>, as that is the time the
		288	last event processing phase started. With L<EV>, your timer gets scheduled
		289	to run at time=503 (C<500> + C<3>).
		290
		291	In one sense, L<Event::Lib> is more exact, as it uses the current time
		292	regardless of any delays introduced by event processing. However, most
		293	callbacks do not expect large delays in processing, so this causes a
		294	higher drift (and a lot more system calls to get the current time).
		295
		296	In another sense, L<EV> is more exact, as your timer will be scheduled at
		297	the same time, regardless of how long event processing actually took.
		298
		299	In either case, if you care (and in most cases, you don't), then you
		300	can get whatever behaviour you want with any event loop, by taking the
		301	difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into
		302	account.
		303
		304	=back
		305
232	=head2 SIGNAL WATCHERS	306	=head2 SIGNAL WATCHERS
233		307
234	You can watch for signals using a signal watcher, C<signal> is the signal	308	You can watch for signals using a signal watcher, C<signal> is the signal
235	I<name> without any C<SIG> prefix, C<cb> is the Perl callback to	309	I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl
236	be invoked whenever a signal occurs.	310	callback to be invoked whenever a signal occurs.
237		311
238	Although the callback might get passed parameters, their value and	312	Although the callback might get passed parameters, their value and
239	presence is undefined and you cannot rely on them. Portable AnyEvent	313	presence is undefined and you cannot rely on them. Portable AnyEvent
240	callbacks cannot use arguments passed to signal watcher callbacks.	314	callbacks cannot use arguments passed to signal watcher callbacks.
241		315
…		…
277	AnyEvent program, you I<have> to create at least one watcher before you	351	AnyEvent program, you I<have> to create at least one watcher before you
278	C<fork> the child (alternatively, you can call C<AnyEvent::detect>).	352	C<fork> the child (alternatively, you can call C<AnyEvent::detect>).
279		353
280	Example: fork a process and wait for it	354	Example: fork a process and wait for it
281		355
282	my $done = AnyEvent->condvar;	356	my $done = AnyEvent->condvar;
283		357
284	my $pid = fork or exit 5;	358	my $pid = fork or exit 5;
285		359
286	my $w = AnyEvent->child (	360	my $w = AnyEvent->child (
287	pid => $pid,	361	pid => $pid,
288	cb => sub {	362	cb => sub {
289	my ($pid, $status) = @_;	363	my ($pid, $status) = @_;
290	warn "pid $pid exited with status $status";	364	warn "pid $pid exited with status $status";
291	$done->send;	365	$done->send;
292	},	366	},
293	);	367	);
294		368
295	# do something else, then wait for process exit	369	# do something else, then wait for process exit
296	$done->recv;	370	$done->recv;
297		371
298	=head2 CONDITION VARIABLES	372	=head2 CONDITION VARIABLES
299		373
300	If you are familiar with some event loops you will know that all of them	374	If you are familiar with some event loops you will know that all of them
301	require you to run some blocking "loop", "run" or similar function that	375	require you to run some blocking "loop", "run" or similar function that
…		…
522		596
523	This is a mutator function that returns the callback set and optionally	597	This is a mutator function that returns the callback set and optionally
524	replaces it before doing so.	598	replaces it before doing so.
525		599
526	The callback will be called when the condition becomes "true", i.e. when	600	The callback will be called when the condition becomes "true", i.e. when
527	C<send> or C<croak> are called. Calling C<recv> inside the callback	601	C<send> or C<croak> are called, with the only argument being the condition
528	or at any later time is guaranteed not to block.	602	variable itself. Calling C<recv> inside the callback or at any later time
		603	is guaranteed not to block.
529		604
530	=back	605	=back
531		606
532	=head1 GLOBAL VARIABLES AND FUNCTIONS	607	=head1 GLOBAL VARIABLES AND FUNCTIONS
533		608
…		…
662	=item L<AnyEvent::Util>	737	=item L<AnyEvent::Util>
663		738
664	Contains various utility functions that replace often-used but blocking	739	Contains various utility functions that replace often-used but blocking
665	functions such as C<inet_aton> by event-/callback-based versions.	740	functions such as C<inet_aton> by event-/callback-based versions.
666		741
667	=item L<AnyEvent::Handle>
668
669	Provide read and write buffers and manages watchers for reads and writes.
670
671	=item L<AnyEvent::Socket>	742	=item L<AnyEvent::Socket>
672		743
673	Provides various utility functions for (internet protocol) sockets,	744	Provides various utility functions for (internet protocol) sockets,
674	addresses and name resolution. Also functions to create non-blocking tcp	745	addresses and name resolution. Also functions to create non-blocking tcp
675	connections or tcp servers, with IPv6 and SRV record support and more.	746	connections or tcp servers, with IPv6 and SRV record support and more.
676		747
		748	=item L<AnyEvent::Handle>
		749
		750	Provide read and write buffers, manages watchers for reads and writes,
		751	supports raw and formatted I/O, I/O queued and fully transparent and
		752	non-blocking SSL/TLS.
		753
677	=item L<AnyEvent::DNS>	754	=item L<AnyEvent::DNS>
678		755
679	Provides rich asynchronous DNS resolver capabilities.	756	Provides rich asynchronous DNS resolver capabilities.
680		757
		758	=item L<AnyEvent::HTTP>
		759
		760	A simple-to-use HTTP library that is capable of making a lot of concurrent
		761	HTTP requests.
		762
681	=item L<AnyEvent::HTTPD>	763	=item L<AnyEvent::HTTPD>
682		764
683	Provides a simple web application server framework.	765	Provides a simple web application server framework.
684		766
685	=item L<AnyEvent::FastPing>	767	=item L<AnyEvent::FastPing>
686		768
687	The fastest ping in the west.	769	The fastest ping in the west.
		770
		771	=item L<AnyEvent::DBI>
		772
		773	Executes L<DBI> requests asynchronously in a proxy process.
		774
		775	=item L<AnyEvent::AIO>
		776
		777	Truly asynchronous I/O, should be in the toolbox of every event
		778	programmer. AnyEvent::AIO transparently fuses L<IO::AIO> and AnyEvent
		779	together.
		780
		781	=item L<AnyEvent::BDB>
		782
		783	Truly asynchronous Berkeley DB access. AnyEvent::BDB transparently fuses
		784	L<BDB> and AnyEvent together.
		785
		786	=item L<AnyEvent::GPSD>
		787
		788	A non-blocking interface to gpsd, a daemon delivering GPS information.
		789
		790	=item L<AnyEvent::IGS>
		791
		792	A non-blocking interface to the Internet Go Server protocol (used by
		793	L<App::IGS>).
688		794
689	=item L<Net::IRC3>	795	=item L<Net::IRC3>
690		796
691	AnyEvent based IRC client module family.	797	AnyEvent based IRC client module family.
692		798
…		…
705		811
706	=item L<Coro>	812	=item L<Coro>
707		813
708	Has special support for AnyEvent via L<Coro::AnyEvent>.	814	Has special support for AnyEvent via L<Coro::AnyEvent>.
709		815
710	=item L<AnyEvent::AIO>, L<IO::AIO>
711
712	Truly asynchronous I/O, should be in the toolbox of every event
713	programmer. AnyEvent::AIO transparently fuses IO::AIO and AnyEvent
714	together.
715
716	=item L<AnyEvent::BDB>, L<BDB>
717
718	Truly asynchronous Berkeley DB access. AnyEvent::AIO transparently fuses
719	IO::AIO and AnyEvent together.
720
721	=item L<IO::Lambda>	816	=item L<IO::Lambda>
722		817
723	The lambda approach to I/O - don't ask, look there. Can use AnyEvent.	818	The lambda approach to I/O - don't ask, look there. Can use AnyEvent.
724		819
725	=back	820	=back
…		…
731	no warnings;	826	no warnings;
732	use strict;	827	use strict;
733		828
734	use Carp;	829	use Carp;
735		830
736	our $VERSION = '4.03';	831	our $VERSION = 4.2;
737	our $MODEL;	832	our $MODEL;
738		833
739	our $AUTOLOAD;	834	our $AUTOLOAD;
740	our @ISA;	835	our @ISA;
741		836
742	our @REGISTRY;	837	our @REGISTRY;
743		838
		839	our $WIN32;
		840
		841	BEGIN {
		842	my $win32 = ! ! ($^O =~ /mswin32/i);
		843	eval "sub WIN32(){ $win32 }";
		844	}
		845
744	our $verbose = $ENV{PERL_ANYEVENT_VERBOSE}*1;	846	our $verbose = $ENV{PERL_ANYEVENT_VERBOSE}*1;
745		847
746	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2)	848	our %PROTOCOL; # (ipv4\|ipv6) => (1\|2), higher numbers are preferred
747		849
748	{	850	{
749	my $idx;	851	my $idx;
750	$PROTOCOL{$_} = ++$idx	852	$PROTOCOL{$_} = ++$idx
		853	for reverse split /\s,\s/,
751	for split /\s,\s/, $ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";	854	$ENV{PERL_ANYEVENT_PROTOCOLS} \|\| "ipv4,ipv6";
752	}	855	}
753		856
754	my @models = (	857	my @models = (
755	[EV:: => AnyEvent::Impl::EV::],	858	[EV:: => AnyEvent::Impl::EV::],
756	[Event:: => AnyEvent::Impl::Event::],	859	[Event:: => AnyEvent::Impl::Event::],
…		…
765	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza	868	[POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
766	[Wx:: => AnyEvent::Impl::POE::],	869	[Wx:: => AnyEvent::Impl::POE::],
767	[Prima:: => AnyEvent::Impl::POE::],	870	[Prima:: => AnyEvent::Impl::POE::],
768	);	871	);
769		872
770	our %method = map +($_ => 1), qw(io timer signal child condvar one_event DESTROY);	873	our %method = map +($_ => 1), qw(io timer time now signal child condvar one_event DESTROY);
771		874
772	our @post_detect;	875	our @post_detect;
773		876
774	sub post_detect(&) {	877	sub post_detect(&) {
775	my ($cb) = @_;	878	my ($cb) = @_;
…		…
792	}	895	}
793		896
794	sub detect() {	897	sub detect() {
795	unless ($MODEL) {	898	unless ($MODEL) {
796	no strict 'refs';	899	no strict 'refs';
		900	local $SIG{__DIE__};
797		901
798	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {	902	if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) {
799	my $model = "AnyEvent::Impl::$1";	903	my $model = "AnyEvent::Impl::$1";
800	if (eval "require $model") {	904	if (eval "require $model") {
801	$MODEL = $model;	905	$MODEL = $model;
…		…
835	$MODEL	939	$MODEL
836	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.";	940	or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.";
837	}	941	}
838	}	942	}
839		943
		944	push @{"$MODEL\::ISA"}, "AnyEvent::Base";
		945
840	unshift @ISA, $MODEL;	946	unshift @ISA, $MODEL;
841	push @{"$MODEL\::ISA"}, "AnyEvent::Base";	947
		948	require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT};
842		949
843	(shift @post_detect)->() while @post_detect;	950	(shift @post_detect)->() while @post_detect;
844	}	951	}
845		952
846	$MODEL	953	$MODEL
…		…
857	my $class = shift;	964	my $class = shift;
858	$class->$func (@_);	965	$class->$func (@_);
859	}	966	}
860		967
861	package AnyEvent::Base;	968	package AnyEvent::Base;
		969
		970	# default implementation for now and time
		971
		972	use Time::HiRes ();
		973
		974	sub time { Time::HiRes::time }
		975	sub now { Time::HiRes::time }
862		976
863	# default implementation for ->condvar	977	# default implementation for ->condvar
864		978
865	sub condvar {	979	sub condvar {
866	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, AnyEvent::CondVar::	980	bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, AnyEvent::CondVar::
…		…
887	sub AnyEvent::Base::Signal::DESTROY {	1001	sub AnyEvent::Base::Signal::DESTROY {
888	my ($signal, $cb) = @{$_[0]};	1002	my ($signal, $cb) = @{$_[0]};
889		1003
890	delete $SIG_CB{$signal}{$cb};	1004	delete $SIG_CB{$signal}{$cb};
891		1005
892	$SIG{$signal} = 'DEFAULT' unless keys %{ $SIG_CB{$signal} };	1006	delete $SIG{$signal} unless keys %{ $SIG_CB{$signal} };
893	}	1007	}
894		1008
895	# default implementation for ->child	1009	# default implementation for ->child
896		1010
897	our %PID_CB;	1011	our %PID_CB;
…		…
924	or Carp::croak "required option 'pid' is missing";	1038	or Carp::croak "required option 'pid' is missing";
925		1039
926	$PID_CB{$pid}{$arg{cb}} = $arg{cb};	1040	$PID_CB{$pid}{$arg{cb}} = $arg{cb};
927		1041
928	unless ($WNOHANG) {	1042	unless ($WNOHANG) {
929	$WNOHANG = eval { require POSIX; &POSIX::WNOHANG } \|\| 1;	1043	$WNOHANG = eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } \|\| 1;
930	}	1044	}
931		1045
932	unless ($CHLD_W) {	1046	unless ($CHLD_W) {
933	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);	1047	$CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld);
934	# child could be a zombie already, so make at least one round	1048	# child could be a zombie already, so make at least one round
…		…
1067	C<PERL_ANYEVENT_MODEL>.	1181	C<PERL_ANYEVENT_MODEL>.
1068		1182
1069	When set to C<2> or higher, cause AnyEvent to report to STDERR which event	1183	When set to C<2> or higher, cause AnyEvent to report to STDERR which event
1070	model it chooses.	1184	model it chooses.
1071		1185
		1186	=item C<PERL_ANYEVENT_STRICT>
		1187
		1188	AnyEvent does not do much argument checking by default, as thorough
		1189	argument checking is very costly. Setting this variable to a true value
		1190	will cause AnyEvent to thoroughly check the arguments passed to most
		1191	method calls and croaks if it finds any problems. In other words, enables
		1192	"strict" mode. Unlike C<use strict> it is definitely recommended ot keep
		1193	it off in production.
		1194
1072	=item C<PERL_ANYEVENT_MODEL>	1195	=item C<PERL_ANYEVENT_MODEL>
1073		1196
1074	This can be used to specify the event model to be used by AnyEvent, before	1197	This can be used to specify the event model to be used by AnyEvent, before
1075	auto detection and -probing kicks in. It must be a string consisting	1198	auto detection and -probing kicks in. It must be a string consisting
1076	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended	1199	entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended
…		…
1081	This functionality might change in future versions.	1204	This functionality might change in future versions.
1082		1205
1083	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you	1206	For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you
1084	could start your program like this:	1207	could start your program like this:
1085		1208
1086	PERL_ANYEVENT_MODEL=Perl perl ...	1209	PERL_ANYEVENT_MODEL=Perl perl ...
1087		1210
1088	=item C<PERL_ANYEVENT_PROTOCOLS>	1211	=item C<PERL_ANYEVENT_PROTOCOLS>
1089		1212
1090	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences	1213	Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences
1091	for IPv4 or IPv6. The default is unspecified (and might change, or be the result	1214	for IPv4 or IPv6. The default is unspecified (and might change, or be the result
…		…
1113	some (broken) firewalls drop such DNS packets, which is why it is off by	1236	some (broken) firewalls drop such DNS packets, which is why it is off by
1114	default.	1237	default.
1115		1238
1116	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce	1239	Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce
1117	EDNS0 in its DNS requests.	1240	EDNS0 in its DNS requests.
		1241
		1242	=item C<PERL_ANYEVENT_MAX_FORKS>
		1243
		1244	The maximum number of child processes that C<AnyEvent::Util::fork_call>
		1245	will create in parallel.
1118		1246
1119	=back	1247	=back
1120		1248
1121	=head1 EXAMPLE PROGRAM	1249	=head1 EXAMPLE PROGRAM
1122		1250
…		…
1561	specified in the variable.	1689	specified in the variable.
1562		1690
1563	You can make AnyEvent completely ignore this variable by deleting it	1691	You can make AnyEvent completely ignore this variable by deleting it
1564	before the first watcher gets created, e.g. with a C<BEGIN> block:	1692	before the first watcher gets created, e.g. with a C<BEGIN> block:
1565		1693
1566	BEGIN { delete $ENV{PERL_ANYEVENT_MODEL} }	1694	BEGIN { delete $ENV{PERL_ANYEVENT_MODEL} }
1567		1695
1568	use AnyEvent;	1696	use AnyEvent;
1569		1697
1570	Similar considerations apply to $ENV{PERL_ANYEVENT_VERBOSE}, as that can	1698	Similar considerations apply to $ENV{PERL_ANYEVENT_VERBOSE}, as that can
1571	be used to probe what backend is used and gain other information (which is	1699	be used to probe what backend is used and gain other information (which is
1572	probably even less useful to an attacker than PERL_ANYEVENT_MODEL).	1700	probably even less useful to an attacker than PERL_ANYEVENT_MODEL), and
		1701	$ENV{PERL_ANYEGENT_STRICT}.
		1702
		1703
		1704	=head1 BUGS
		1705
		1706	Perl 5.8 has numerous memleaks that sometimes hit this module and are hard
		1707	to work around. If you suffer from memleaks, first upgrade to Perl 5.10
		1708	and check wether the leaks still show up. (Perl 5.10.0 has other annoying
		1709	mamleaks, such as leaking on C<map> and C<grep> but it is usually not as
		1710	pronounced).
1573		1711
1574		1712
1575	=head1 SEE ALSO	1713	=head1 SEE ALSO
1576		1714
1577	Utility functions: L<AnyEvent::Util>.	1715	Utility functions: L<AnyEvent::Util>.
…		…
1594	Nontrivial usage examples: L<Net::FCP>, L<Net::XMPP2>, L<AnyEvent::DNS>.	1732	Nontrivial usage examples: L<Net::FCP>, L<Net::XMPP2>, L<AnyEvent::DNS>.
1595		1733
1596		1734
1597	=head1 AUTHOR	1735	=head1 AUTHOR
1598		1736
1599	Marc Lehmann <schmorp@schmorp.de>	1737	Marc Lehmann <schmorp@schmorp.de>
1600	http://home.schmorp.de/	1738	http://home.schmorp.de/
1601		1739
1602	=cut	1740	=cut
1603		1741
1604	1	1742	1
1605		1743

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Comparing AnyEvent/lib/AnyEvent.pm (file contents): Revision 1.135 by root, Sun May 25 04:49:01 2008 UTC vs. Revision 1.168 by root, Tue Jul 8 23:53:37 2008 UTC

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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.135 by root, Sun May 25 04:49:01 2008 UTC vs.
Revision 1.168 by root, Tue Jul 8 23:53:37 2008 UTC