[ViewVC] Diff of: cvs/EV/EV.pm

Comparing EV/EV.pm (file contents):
Revision 1.6 by root, Sat Oct 27 07:30:10 2007 UTC vs.
Revision 1.38 by root, Mon Nov 12 21:51:14 2007 UTC

1	=head1 NAME	1	=head1 NAME
2		2
3	EV - perl interface to libevent, monkey.org/~provos/libevent/	3	EV - perl interface to libev, a high performance full-featured event loop
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use EV;	7	use EV;
8		8
9	# TIMER	9	# TIMERS
10		10
11	my $w = EV::timer 2, 0, sub {	11	my $w = EV::timer 2, 0, sub {
12	warn "is called after 2s";	12	warn "is called after 2s";
13	};	13	};
14		14
15	my $w = EV::timer 2, 1, sub {	15	my $w = EV::timer 2, 2, sub {
16	warn "is called roughly every 2s (repeat = 1)";	16	warn "is called roughly every 2s (repeat = 2)";
17	};	17	};
18		18
19	undef $w; # destroy event watcher again	19	undef $w; # destroy event watcher again
20		20
21	# IO
22
23	my $w = EV::timer_abs 0, 60, sub {	21	my $w = EV::periodic 0, 60, 0, sub {
24	warn "is called every minute, on the minute, exactly";	22	warn "is called every minute, on the minute, exactly";
25	};	23	};
26		24
		25	# IO
		26
27	my $w = EV::io \*STDIN, EV::READ \| EV::PERSIST, sub {	27	my $w = EV::io *STDIN, EV::READ, sub {
28	my ($w, $events) = @_; # all callbacks get the watcher object and event mask	28	my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
29	if ($events & EV::TIMEOUT) {
30	warn "nothign received on stdin for 10 seconds, retrying";
31	} else {
32	warn "stdin is readable, you entered: ", <STDIN>;	29	warn "stdin is readable, you entered: ", <STDIN>;
33	}
34	};	30	};
35	$w->timeout (10);	31
		32	# SIGNALS
		33
		34	my $w = EV::signal 'QUIT', sub {
		35	warn "sigquit received\n";
		36	};
		37
		38	# CHILD/PID STATUS CHANGES
36		39
		40	my $w = EV::child 666, sub {
		41	my ($w, $revents) = @_;
		42	my $status = $w->rstatus;
		43	};
		44
37	# MAINLOOP	45	# MAINLOOP
38	EV::dispatch; # loop as long as watchers are active	46	EV::loop; # loop until EV::loop_done is called or all watchers stop
39	EV::loop; # the same thing	47	EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled
40	EV::loop EV::LOOP_ONCE;	48	EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block
41	EV::loop EV::LOOP_ONSHOT;
42		49
43	=head1 DESCRIPTION	50	=head1 DESCRIPTION
44		51
45	This module provides an interface to libevent	52	This module provides an interface to libev
46	(L<http://monkey.org/~provos/libevent/>). You probably should acquaint	53	(L<http://software.schmorp.de/pkg/libev.html>).
47	yourself with its documentation and source code to be able to use this
48	module fully.
49
50	Please note thta this module disables the libevent EPOLL method by
51	default, see BUGS, below, if you need to enable it.
52		54
53	=cut	55	=cut
54		56
55	package EV;	57	package EV;
56		58
57	use strict;	59	use strict;
58		60
59	BEGIN {	61	BEGIN {
60	our $VERSION = '0.01';	62	our $VERSION = '0.9';
61	use XSLoader;	63	use XSLoader;
62	XSLoader::load "EV", $VERSION;	64	XSLoader::load "EV", $VERSION;
63	}	65	}
64		66
65	=head1 FUNCTIONAL INTERFACE	67	@EV::Io::ISA =
		68	@EV::Timer::ISA =
		69	@EV::Periodic::ISA =
		70	@EV::Signal::ISA =
		71	@EV::Idle::ISA =
		72	@EV::Prepare::ISA =
		73	@EV::Check::ISA =
		74	@EV::Child::ISA = "EV::Watcher";
		75
		76	=head1 BASIC INTERFACE
66		77
67	=over 4	78	=over 4
68		79
69	=item $EV::NPRI	80	=item $EV::DIED
70		81
71	How many priority levels are available.	82	Must contain a reference to a function that is called when a callback
		83	throws an exception (with $@ containing thr error). The default prints an
		84	informative message and continues.
		85
		86	If this callback throws an exception it will be silently ignored.
		87
		88	=item $time = EV::time
		89
		90	Returns the current time in (fractional) seconds since the epoch.
72		91
73	=item $time = EV::now	92	=item $time = EV::now
74		93
75	Returns the time in (fractional) seconds since the epoch.	94	Returns the time the last event loop iteration has been started. This
		95	is the time that (relative) timers are based on, and refering to it is
		96	usually faster then calling EV::time.
76		97
77	=item $version = EV::version
78
79	=item $method = EV::method	98	=item $method = EV::ev_method
80		99
81	Return version string and event polling method used.	100	Returns an integer describing the backend used by libev (EV::METHOD_SELECT
		101	or EV::METHOD_EPOLL).
82		102
83	=item EV::loop $flags # EV::LOOP_ONCE, EV::LOOP_ONESHOT	103	=item EV::loop [$flags]
84		104
85	=item EV::loopexit $after	105	Begin checking for events and calling callbacks. It returns when a
		106	callback calls EV::loop_done.
86		107
87	Exit any active loop or dispatch after C<$after> seconds or immediately if	108	The $flags argument can be one of the following:
88	C<$after> is missing or zero.
89		109
90	=item EV::dispatch	110	0 as above
		111	EV::LOOP_ONESHOT block at most once (wait, but do not loop)
		112	EV::LOOP_NONBLOCK do not block at all (fetch/handle events but do not wait)
91		113
92	Same as C<EV::loop 0>.	114	=item EV::loop_done [$how]
93		115
94	=item EV::event $callback	116	When called with no arguments or an argument of 1, makes the innermost
		117	call to EV::loop return.
95		118
96	Creates a new event watcher waiting for nothing, calling the given callback.	119	When called with an agrument of 2, all calls to EV::loop will return as
		120	fast as possible.
97		121
		122	=back
		123
		124	=head2 WATCHER
		125
		126	A watcher is an object that gets created to record your interest in some
		127	event. For instance, if you want to wait for STDIN to become readable, you
		128	would create an EV::io watcher for that:
		129
		130	my $watcher = EV::io *STDIN, EV::READ, sub {
		131	my ($watcher, $revents) = @_;
		132	warn "yeah, STDIN should not be readable without blocking!\n"
		133	};
		134
		135	All watchers can be active (waiting for events) or inactive (paused). Only
		136	active watchers will have their callbacks invoked. All callbacks will be
		137	called with at least two arguments: the watcher and a bitmask of received
		138	events.
		139
		140	Each watcher type has its associated bit in revents, so you can use the
		141	same callback for multiple watchers. The event mask is named after the
		142	type, i..e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,
		143	EV::periodic sets EV::PERIODIC and so on, with the exception of IO events
		144	(which can set both EV::READ and EV::WRITE bits), and EV::timer (which
		145	uses EV::TIMEOUT).
		146
		147	In the rare case where one wants to create a watcher but not start it at
		148	the same time, each constructor has a variant with a trailing C<_ns> in
		149	its name, e.g. EV::io has a non-starting variant EV::io_ns and so on.
		150
		151	Please note that a watcher will automatically be stopped when the watcher
		152	object is destroyed, so you I<need> to keep the watcher objects returned by
		153	the constructors.
		154
		155	Also, all methods changing some aspect of a watcher (->set, ->priority,
		156	->fh and so on) automatically stop and start it again if it is active,
		157	which means pending events get lost.
		158
		159	=head2 WATCHER TYPES
		160
		161	Now lets move to the existing watcher types and asociated methods.
		162
		163	The following methods are available for all watchers. Then followes a
		164	description of each watcher constructor (EV::io, EV::timer, EV::periodic,
		165	EV::signal, EV::child, EV::idle, EV::prepare and EV::check), followed by
		166	any type-specific methods (if any).
		167
		168	=over 4
		169
		170	=item $w->start
		171
		172	Starts a watcher if it isn't active already. Does nothing to an already
		173	active watcher. By default, all watchers start out in the active state
		174	(see the description of the C<_ns> variants if you need stopped watchers).
		175
		176	=item $w->stop
		177
		178	Stop a watcher if it is active. Also clear any pending events (events that
		179	have been received but that didn't yet result in a callback invocation),
		180	regardless of wether the watcher was active or not.
		181
		182	=item $bool = $w->is_active
		183
		184	Returns true if the watcher is active, false otherwise.
		185
		186	=item $current_data = $w->data
		187
		188	=item $old_data = $w->data ($new_data)
		189
		190	Queries a freely usable data scalar on the watcher and optionally changes
		191	it. This is a way to associate custom data with a watcher:
		192
		193	my $w = EV::timer 60, 0, sub {
		194	warn $_[0]->data;
		195	};
		196	$w->data ("print me!");
		197
		198	=item $current_cb = $w->cb
		199
		200	=item $old_cb = $w->cb ($new_cb)
		201
		202	Queries the callback on the watcher and optionally changes it. You can do
		203	this at any time without the watcher restarting.
		204
		205	=item $current_priority = $w->priority
		206
		207	=item $old_priority = $w->priority ($new_priority)
		208
		209	Queries the priority on the watcher and optionally changes it. Pending
		210	watchers with higher priority will be invoked first. The valid range of
		211	priorities lies between EV::MAXPRI (default 2) and EV::MINPRI (default
		212	-2). If the priority is outside this range it will automatically be
		213	normalised to the nearest valid priority.
		214
		215	The default priority of any newly-created weatcher is 0.
		216
		217	=item $w->trigger ($revents)
		218
		219	Call the callback now with the given event mask.
		220
		221
98	=item my $w = EV::io $fileno_or_fh, $eventmask, $callback	222	=item $w = EV::io $fileno_or_fh, $eventmask, $callback
99		223
100	=item my $w = EV::io_ns $fileno_or_fh, $eventmask, $callback	224	=item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback
101		225
102	As long as the returned watcher object is alive, call the C<$callback>	226	As long as the returned watcher object is alive, call the C<$callback>
103	when the events specified in C<$eventmask> happen. Initially, the timeout	227	when the events specified in C<$eventmask>.
104	is disabled.
105		228
106	The C<io_ns> variant doesn't add/start the newly created watcher.
107
108	Eventmask can be one or more of these constants ORed together:	229	The $eventmask can be one or more of these constants ORed together:
109		230
110	EV::READ wait until read() wouldn't block anymore	231	EV::READ wait until read() wouldn't block anymore
111	EV::WRITE wait until write() wouldn't block anymore	232	EV::WRITE wait until write() wouldn't block anymore
112	EV::PERSIST stay active after an event occured
113		233
		234	The C<io_ns> variant doesn't start (activate) the newly created watcher.
		235
		236	=item $w->set ($fileno_or_fh, $eventmask)
		237
		238	Reconfigures the watcher, see the constructor above for details. Can be
		239	called at any time.
		240
		241	=item $current_fh = $w->fh
		242
		243	=item $old_fh = $w->fh ($new_fh)
		244
		245	Returns the previously set filehandle and optionally set a new one.
		246
		247	=item $current_eventmask = $w->events
		248
		249	=item $old_eventmask = $w->events ($new_eventmask)
		250
		251	Returns the previously set event mask and optionally set a new one.
		252
		253
114	=item my $w = EV::timer $after, $repeat, $callback	254	=item $w = EV::timer $after, $repeat, $callback
115		255
116	=item my $w = EV::timer_ns $after, $repeat, $callback	256	=item $w = EV::timer_ns $after, $repeat, $callback
117		257
118	Calls the callback after C<$after> seconds. If C<$repeat> is true, the	258	Calls the callback after C<$after> seconds. If C<$repeat> is non-zero,
119	timer will be restarted after the callback returns. This means that the	259	the timer will be restarted (with the $repeat value as $after) after the
120	callback would be called roughly every C<$after> seconds, prolonged by the	260	callback returns.
121	time the callback takes.
122		261
		262	This means that the callback would be called roughly after C<$after>
		263	seconds, and then every C<$repeat> seconds. "Roughly" because the time of
		264	callback processing is not taken into account, so the timer will slowly
		265	drift. If that isn't acceptable, look at EV::periodic.
		266
		267	The timer is based on a monotonic clock, that is if somebody is sitting
		268	in front of the machine while the timer is running and changes the system
		269	clock, the timer will nevertheless run (roughly) the same time.
		270
123	The C<timer_ns> variant doesn't add/start the newly created watcher.	271	The C<timer_ns> variant doesn't start (activate) the newly created watcher.
124		272
125	=item my $w = EV::timer_abs $at, $interval, $callback	273	=item $w->set ($after, $repeat)
126		274
127	=item my $w = EV::timer_abs_ns $at, $interval, $callback	275	Reconfigures the watcher, see the constructor above for details. Can be at
		276	any time.
128		277
129	Similar to EV::timer, but the time is given as an absolute point in time	278	=item $w->again
130	(C<$at>), plus an optional C<$interval>.
131		279
132	If the C<$interval> is zero, then the callback will be called at the time	280	Similar to the C<start> method, but has special semantics for repeating timers:
133	C<$at> if that is in the future, or as soon as possible if its in the
134	past. It will not automatically repeat.
135		281
136	If the C<$interval> is nonzero, then the watcher will always be scheduled	282	If the timer is active and repeating, reset the timeout to occur
137	to time out at the next C<$at + integer * $interval> time.	283	C<$repeat> seconds after now.
138		284
139	This can be used to schedule a callback to run at very regular intervals,	285	If the timer is active and non-repeating, it will be stopped.
140	as long as the processing time is less then the interval (otherwise
141	obviously events will be skipped).
142		286
143	The C<timer_abs_ns> variant doesn't add/start the newly created watcher.	287	If the timer is in active and repeating, start it.
144		288
145	=item my $w = EV::signal $signum, $callback	289	Otherwise do nothing.
146		290
147	=item my $w = EV::signal_ns $signum, $callback	291	This behaviour is useful when you have a timeout for some IO
		292	operation. You create a timer object with the same value for C<$after> and
		293	C<$repeat>, and then, in the read/write watcher, run the C<again> method
		294	on the timeout.
148		295
149	Call the callback when signal $signum is received.
150		296
151	The C<signal_ns> variant doesn't add/start the newly created watcher.	297	=item $w = EV::periodic $at, $interval, $reschedule_cb, $callback
		298
		299	=item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback
		300
		301	Similar to EV::timer, but is not based on relative timeouts but on
		302	absolute times. Apart from creating "simple" timers that trigger "at" the
		303	specified time, it can also be used for non-drifting absolute timers and
		304	more complex, cron-like, setups that are not adversely affected by time
		305	jumps (i.e. when the system clock is changed by explicit date -s or other
		306	means such as ntpd). It is also the most complex watcher type in EV.
		307
		308	It has three distinct "modes":
		309
		310	=over 4
		311
		312	=item * absolute timer ($interval = $reschedule_cb = 0)
		313
		314	This time simply fires at the wallclock time C<$at> and doesn't repeat. It
		315	will not adjust when a time jump occurs, that is, if it is to be run
		316	at January 1st 2011 then it will run when the system time reaches or
		317	surpasses this time.
		318
		319	=item * non-repeating interval timer ($interval > 0, $reschedule_cb = 0)
		320
		321	In this mode the watcher will always be scheduled to time out at the
		322	next C<$at + N * $interval> time (for some integer N) and then repeat,
		323	regardless of any time jumps.
		324
		325	This can be used to create timers that do not drift with respect to system
		326	time:
		327
		328	my $hourly = EV::periodic 0, 3600, 0, sub { print "once/hour\n" };
		329
		330	That doesn't mean there will always be 3600 seconds in between triggers,
		331	but only that the the clalback will be called when the system time shows a
		332	full hour (UTC).
		333
		334	Another way to think about it (for the mathematically inclined) is that
		335	EV::periodic will try to run the callback in this mode at the next
		336	possible time where C<$time = $at (mod $interval)>, regardless of any time
		337	jumps.
		338
		339	=item * manual reschedule mode ($reschedule_cb = coderef)
		340
		341	In this mode $interval and $at are both being ignored. Instead, each
		342	time the periodic watcher gets scheduled, the reschedule callback
		343	($reschedule_cb) will be called with the watcher as first, and the current
		344	time as second argument.
		345
		346	I<This callback MUST NOT stop or destroy this or any other periodic
		347	watcher, ever>. If you need to stop it, return 1e30 and stop it
		348	afterwards.
		349
		350	It must return the next time to trigger, based on the passed time value
		351	(that is, the lowest time value larger than to the second argument). It
		352	will usually be called just before the callback will be triggered, but
		353	might be called at other times, too.
		354
		355	This can be used to create very complex timers, such as a timer that
		356	triggers on each midnight, local time (actually 24 hours after the last
		357	midnight, to keep the example simple. If you know a way to do it correctly
		358	in about the same space (without requiring elaborate modules), drop me a
		359	note :):
		360
		361	my $daily = EV::periodic 0, 0, sub {
		362	my ($w, $now) = @_;
		363
		364	use Time::Local ();
		365	my (undef, undef, undef, $d, $m, $y) = localtime $now;
		366	86400 + Time::Local::timelocal 0, 0, 0, $d, $m, $y
		367	}, sub {
		368	print "it's midnight or likely shortly after, now\n";
		369	};
152		370
153	=back	371	=back
154		372
155	=head1 THE EV::Event CLASS	373	The C<periodic_ns> variant doesn't start (activate) the newly created watcher.
156		374
157	All EV functions creating an event watcher (designated by C<my $w =>	375	=item $w->set ($at, $interval, $reschedule_cb)
158	above) support the following methods on the returned watcher object:
159		376
160	=over 4	377	Reconfigures the watcher, see the constructor above for details. Can be at
		378	any time.
161		379
162	=item $w->add ($timeout)	380	=item $w->again
163		381
164	Stops and (re-)starts the event watcher, setting the optional timeout to	382	Simply stops and starts the watcher again.
165	the given value, or clearing the timeout if none is given.
166		383
167	=item $w->start
168		384
169	Stops and (re-)starts the event watcher without touching the timeout.	385	=item $w = EV::signal $signal, $callback
170		386
171	=item $w->del	387	=item $w = EV::signal_ns $signal, $callback
172		388
		389	Call the callback when $signal is received (the signal can be specified
		390	by number or by name, just as with kill or %SIG).
		391
		392	EV will grab the signal for the process (the kernel only allows one
		393	component to receive a signal at a time) when you start a signal watcher,
		394	and removes it again when you stop it. Perl does the same when you
		395	add/remove callbacks to %SIG, so watch out.
		396
		397	You can have as many signal watchers per signal as you want.
		398
		399	The C<signal_ns> variant doesn't start (activate) the newly created watcher.
		400
		401	=item $w->set ($signal)
		402
		403	Reconfigures the watcher, see the constructor above for details. Can be at
		404	any time.
		405
		406	=item $current_signum = $w->signal
		407
		408	=item $old_signum = $w->signal ($new_signal)
		409
		410	Returns the previously set signal (always as a number not name) and
		411	optionally set a new one.
		412
		413
		414	=item $w = EV::child $pid, $callback
		415
		416	=item $w = EV::child_ns $pid, $callback
		417
		418	Call the callback when a status change for pid C<$pid> (or any pid
		419	if C<$pid> is 0) has been received. More precisely: when the process
		420	receives a SIGCHLD, EV will fetch the outstanding exit/wait status for all
		421	changed/zombie children and call the callback.
		422
		423	You can access both status and pid by using the C<rstatus> and C<rpid>
		424	methods on the watcher object.
		425
		426	You can have as many pid watchers per pid as you want.
		427
		428	The C<child_ns> variant doesn't start (activate) the newly created watcher.
		429
173	=item $w->stop	430	=item $w->set ($pid)
174		431
175	Stop the event watcher if it was started.	432	Reconfigures the watcher, see the constructor above for details. Can be at
		433	any time.
176		434
177	=item $current_callback = $w->cb
178
179	=item $old_callback = $w->cb ($new_callback)
180
181	Return the previously set callback and optionally set a new one.
182
183	=item $current_fh = $w->fh	435	=item $current_pid = $w->pid
184		436
185	=item $old_fh = $w->fh ($new_fh)	437	=item $old_pid = $w->pid ($new_pid)
186		438
187	Returns the previously set filehandle and optionally set a new one.
188
189	=item $current_eventmask = $w->events
190
191	=item $old_eventmask = $w->events ($new_eventmask)
192
193	Returns the previously set event mask and optionally set a new one.	439	Returns the previously set process id and optionally set a new one.
194		440
195	=item $w->timeout ($after, $repeat)	441	=item $exit_status = $w->rstatus
196		442
197	Resets the timeout (see C<EV::timer> for details).	443	Return the exit/wait status (as returned by waitpid, see the waitpid entry
		444	in perlfunc).
198		445
199	=item $w->timeout_abs ($at, $interval)	446	=item $pid = $w->rpid
200		447
201	Resets the timeout (see C<EV::timer_abs> for details).	448	Return the pid of the awaited child (useful when you have installed a
		449	watcher for all pids).
202		450
203	=item $w->priority_set ($priority)
204		451
205	Set the priority of the watcher to C<$priority> (0 <= $priority < $EV::NPRI).	452	=item $w = EV::idle $callback
		453
		454	=item $w = EV::idle_ns $callback
		455
		456	Call the callback when there are no pending io, timer/periodic, signal or
		457	child events, i.e. when the process is idle.
		458
		459	The process will not block as long as any idle watchers are active, and
		460	they will be called repeatedly until stopped.
		461
		462	The C<idle_ns> variant doesn't start (activate) the newly created watcher.
		463
		464
		465	=item $w = EV::prepare $callback
		466
		467	=item $w = EV::prepare_ns $callback
		468
		469	Call the callback just before the process would block. You can still
		470	create/modify any watchers at this point.
		471
		472	See the EV::check watcher, below, for explanations and an example.
		473
		474	The C<prepare_ns> variant doesn't start (activate) the newly created watcher.
		475
		476
		477	=item $w = EV::check $callback
		478
		479	=item $w = EV::check_ns $callback
		480
		481	Call the callback just after the process wakes up again (after it has
		482	gathered events), but before any other callbacks have been invoked.
		483
		484	This is used to integrate other event-based software into the EV
		485	mainloop: You register a prepare callback and in there, you create io and
		486	timer watchers as required by the other software. Here is a real-world
		487	example of integrating Net::SNMP (with some details left out):
		488
		489	our @snmp_watcher;
		490
		491	our $snmp_prepare = EV::prepare sub {
		492	# do nothing unless active
		493	$dispatcher->{_event_queue_h}
		494	or return;
		495
		496	# make the dispatcher handle any outstanding stuff
		497
		498	# create an IO watcher for each and every socket
		499	@snmp_watcher = (
		500	(map { EV::io $_, EV::READ, sub { } }
		501	keys %{ $dispatcher->{_descriptors} }),
		502	);
		503
		504	# if there are any timeouts, also create a timer
		505	push @snmp_watcher, EV::timer $event->[Net::SNMP::Dispatcher::_TIME] - EV::now, 0, sub { }
		506	if $event->[Net::SNMP::Dispatcher::_ACTIVE];
		507	};
		508
		509	The callbacks are irrelevant, the only purpose of those watchers is
		510	to wake up the process as soon as one of those events occurs (socket
		511	readable, or timer timed out). The corresponding EV::check watcher will then
		512	clean up:
		513
		514	our $snmp_check = EV::check sub {
		515	# destroy all watchers
		516	@snmp_watcher = ();
		517
		518	# make the dispatcher handle any new stuff
		519	};
		520
		521	The callbacks of the created watchers will not be called as the watchers
		522	are destroyed before this cna happen (remember EV::check gets called
		523	first).
		524
		525	The C<check_ns> variant doesn't start (activate) the newly created watcher.
206		526
207	=back	527	=back
208		528
209	=head1 BUGS	529	=head1 THREADS
210		530
211	Lots. Libevent itself isn't well tested and rather buggy, and this module	531	Threads are not supported by this in any way. Perl pseudo-threads is evil
212	is quite new at the moment.	532	stuff and must die.
213
214	Please note that the epoll method is not, in general, reliable in
215	programs that use fork (even if no libveent calls are being made in the
216	forked process). Since this is such a common issue, this module will
217	force the epoll method in EV to be off unless the global variable
218	$EV::ENABLE_EPOLL is set to 1 before loading this module for the first
219	time.
220		533
221	=cut	534	=cut
222		535
223	our $NPRI = 4;	536	our $DIED = sub {
224	our $BASE;	537	warn "EV: error in callback (ignoring): $@";
225	our $ENABLE_EPOLL;	538	};
226		539
227	{	540	default_loop
228	local $ENV{EVENT_NOEPOLL};	541	or die 'EV: cannot initialise libev backend. bad $ENV{LIBEV_METHODS}?';
229	$ENV{EVENT_NOEPOLL} = 1 unless $ENABLE_EPOLL;
230	$BASE = init;
231	}
232
233	priority_init $NPRI;
234
235	push @AnyEvent::REGISTRY, [EV => "EV::AnyEvent"];
236		542
237	1;	543	1;
238		544
239	=head1 SEE ALSO	545	=head1 SEE ALSO
240		546
241	L<EV::DNS>, L<event(3)>, L<event.h>, L<evdns.h>.
242	L<EV::AnyEvent>.	547	L<EV::DNS>, L<EV::AnyEvent>.
243		548
244	=head1 AUTHOR	549	=head1 AUTHOR
245		550
246	Marc Lehmann <schmorp@schmorp.de>	551	Marc Lehmann <schmorp@schmorp.de>
247	http://home.schmorp.de/	552	http://home.schmorp.de/

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Comparing EV/EV.pm (file contents): Revision 1.6 by root, Sat Oct 27 07:30:10 2007 UTC vs. Revision 1.38 by root, Mon Nov 12 21:51:14 2007 UTC

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Comparing EV/EV.pm (file contents):
Revision 1.6 by root, Sat Oct 27 07:30:10 2007 UTC vs.
Revision 1.38 by root, Mon Nov 12 21:51:14 2007 UTC