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

Comparing EV/EV.pm (file contents):
Revision 1.23 by root, Fri Nov 2 20:21:33 2007 UTC vs.
Revision 1.88 by root, Wed Apr 16 17:08:29 2008 UTC

…		…
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	my $w = EV::periodic 0, 60, sub {	21	my $w = EV::periodic 0, 60, 0, sub {
22	warn "is called every minute, on the minute, exactly";	22	warn "is called every minute, on the minute, exactly";
23	};	23	};
24		24
25	# IO	25	# IO
26		26
27	my $w = EV::io *STDIN, EV::READ, sub {	27	my $w = EV::io *STDIN, EV::READ, sub {
28	my ($w, $revents) = @_; # all callbacks get the watcher object and event mask	28	my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
29	warn "stdin is readable, you entered: ", <STDIN>;	29	warn "stdin is readable, you entered: ", <STDIN>;
30	};	30	};
31		31
32	# SIGNALS	32	# SIGNALS
33		33
34	my $w = EV::signal 'QUIT', sub {	34	my $w = EV::signal 'QUIT', sub {
35	warn "sigquit received\n";	35	warn "sigquit received\n";
36	};	36	};
37		37
38	my $w = EV::signal 3, sub {	38	# CHILD/PID STATUS CHANGES
39	warn "sigquit received (this is GNU/Linux, right?)\n";	39
		40	my $w = EV::child 666, 0, sub {
		41	my ($w, $revents) = @_;
		42	my $status = $w->rstatus;
40	};	43	};
41		44
42	# CHILD/PID STATUS CHANGES	45	# STAT CHANGES
43		46	my $w = EV::stat "/etc/passwd", 10, sub {
44	my $w = EV::child 666, sub {
45	my ($w, $revents, $status) = @_;	47	my ($w, $revents) = @_;
		48	warn $w->path, " has changed somehow.\n";
46	};	49	};
47		50
48	# MAINLOOP	51	# MAINLOOP
49	EV::loop; # loop until EV::loop_done is called	52	EV::loop; # loop until EV::unloop is called or all watchers stop
50	EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled	53	EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled
51	EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block	54	EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block
52		55
53	=head1 DESCRIPTION	56	=head1 DESCRIPTION
54		57
55	This module provides an interface to libev	58	This module provides an interface to libev
56	(L<http://software.schmorp.de/pkg/libev.html>).	59	(L<http://software.schmorp.de/pkg/libev.html>). While the documentation
		60	below is comprehensive, one might also consult the documentation of libev
		61	itself (L<http://cvs.schmorp.de/libev/ev.html>) for more subtle details on
		62	watcher semantics or some discussion on the available backends, or how to
		63	force a specific backend with C<LIBEV_FLAGS>, or just about in any case
		64	because it has much more detailed information.
57		65
58	=cut	66	=cut
59		67
60	package EV;	68	package EV;
61		69
62	use strict;	70	use strict;
63		71
64	BEGIN {	72	BEGIN {
65	our $VERSION = '0.1';	73	our $VERSION = '3.3';
66	use XSLoader;	74	use XSLoader;
67	XSLoader::load "EV", $VERSION;	75	XSLoader::load "EV", $VERSION;
68	}	76	}
69		77
70	@EV::Io::ISA =	78	@EV::IO::ISA =
71	@EV::Timer::ISA =	79	@EV::Timer::ISA =
72	@EV::Periodic::ISA =	80	@EV::Periodic::ISA =
73	@EV::Signal::ISA =	81	@EV::Signal::ISA =
		82	@EV::Child::ISA =
		83	@EV::Stat::ISA =
74	@EV::Idle::ISA =	84	@EV::Idle::ISA =
75	@EV::Prepare::ISA =	85	@EV::Prepare::ISA =
76	@EV::Check::ISA =	86	@EV::Check::ISA =
77	@EV::Child::ISA = "EV::Watcher";	87	@EV::Embed::ISA =
		88	@EV::Fork::ISA =
		89	@EV::Async::ISA =
		90	"EV::Watcher";
		91
		92	@EV::Loop::Default::ISA = "EV::Loop";
		93
		94	=head1 EVENT LOOPS
		95
		96	EV supports multiple event loops: There is a single "default event loop"
		97	that can handle everything including signals and child watchers, and any
		98	number of "dynamic event loops" that can use different backends (with
		99	various limitations), but no child and signal watchers.
		100
		101	You do not have to do anything to create the default event loop: When
		102	the module is loaded a suitable backend is selected on the premise of
		103	selecting a working backend (which for example rules out kqueue on most
		104	BSDs). Modules should, unless they have "special needs" always use the
		105	default loop as this is fastest (perl-wise), best supported by other
		106	modules (e.g. AnyEvent or Coro) and most portable event loop.
		107
		108	For specific programs you can create additional event loops dynamically.
		109
		110	=over 4
		111
		112	=item $loop = new EV::loop [$flags]
		113
		114	Create a new event loop as per the specified flags. Please refer to the
		115	C<ev_loop_new ()> function description in the libev documentation
		116	(L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#GLOBAL_FUNCTIONS>)
		117	for more info.
		118
		119	The loop will automatically be destroyed when it is no longer referenced
		120	by any watcher and the loop object goes out of scope.
		121
		122	Using C<EV::FLAG_FORKCHECK> is recommended, as only the default event loop
		123	is protected by this module.
		124
		125	=item $loop->loop_fork
		126
		127	Must be called after a fork in the child, before entering or continuing
		128	the event loop. An alternative is to use C<EV::FLAG_FORKCHECK> which calls
		129	this fucntion automatically, at some performance loss (refer to the libev
		130	documentation).
		131
		132	=item $loop = EV::default_loop [$flags]
		133
		134	Return the default loop (which is a singleton object).
		135
		136	=back
		137
78		138
79	=head1 BASIC INTERFACE	139	=head1 BASIC INTERFACE
80		140
81	=over 4	141	=over 4
82		142
83	=item $EV::DIED	143	=item $EV::DIED
84		144
85	Must contain a reference to a function that is called when a callback	145	Must contain a reference to a function that is called when a callback
86	throws an exception (with $@ containing thr error). The default prints an	146	throws an exception (with $@ containing the error). The default prints an
87	informative message and continues.	147	informative message and continues.
88		148
89	If this callback throws an exception it will be silently ignored.	149	If this callback throws an exception it will be silently ignored.
90		150
		151	=item $flags = EV::supported_backends
		152
		153	=item $flags = EV::recommended_backends
		154
		155	=item $flags = EV::embeddable_backends
		156
		157	Returns the set (see C<EV::BACKEND_*> flags) of backends supported by this
		158	instance of EV, the set of recommended backends (supposed to be good) for
		159	this platform and the set of embeddable backends (see EMBED WATCHERS).
		160
		161	=item EV::sleep $seconds
		162
		163	Block the process for the given number of (fractional) seconds.
		164
91	=item $time = EV::time	165	=item $time = EV::time
92		166
93	Returns the current time in (fractional) seconds since the epoch.	167	Returns the current time in (fractional) seconds since the epoch.
94		168
95	=item $time = EV::now	169	=item $time = EV::now
		170
		171	=item $time = $loop->now
96		172
97	Returns the time the last event loop iteration has been started. This	173	Returns the time the last event loop iteration has been started. This
98	is the time that (relative) timers are based on, and refering to it is	174	is the time that (relative) timers are based on, and refering to it is
99	usually faster then calling EV::time.	175	usually faster then calling EV::time.
100		176
101	=item $method = EV::ev_method	177	=item $backend = EV::backend
		178
		179	=item $backend = $loop->backend
102		180
103	Returns an integer describing the backend used by libev (EV::METHOD_SELECT	181	Returns an integer describing the backend used by libev (EV::METHOD_SELECT
104	or EV::METHOD_EPOLL).	182	or EV::METHOD_EPOLL).
105		183
106	=item EV::loop [$flags]	184	=item EV::loop [$flags]
107		185
		186	=item $loop->loop ([$flags])
		187
108	Begin checking for events and calling callbacks. It returns when a	188	Begin checking for events and calling callbacks. It returns when a
109	callback calls EV::loop_done.	189	callback calls EV::unloop.
110		190
111	The $flags argument can be one of the following:	191	The $flags argument can be one of the following:
112		192
113	0 as above	193	0 as above
114	EV::LOOP_ONESHOT block at most once (wait, but do not loop)	194	EV::LOOP_ONESHOT block at most once (wait, but do not loop)
115	EV::LOOP_NONBLOCK do not block at all (fetch/handle events but do not wait)	195	EV::LOOP_NONBLOCK do not block at all (fetch/handle events but do not wait)
116		196
117	=item EV::loop_done [$how]	197	=item EV::unloop [$how]
118		198
		199	=item $loop->unloop ([$how])
		200
119	When called with no arguments or an argument of 1, makes the innermost	201	When called with no arguments or an argument of EV::UNLOOP_ONE, makes the
120	call to EV::loop return.	202	innermost call to EV::loop return.
121		203
122	When called with an agrument of 2, all calls to EV::loop will return as	204	When called with an argument of EV::UNLOOP_ALL, all calls to EV::loop will return as
123	fast as possible.	205	fast as possible.
124		206
125	=back	207	=item $count = EV::loop_count
126		208
127	=head2 WATCHER	209	=item $count = $loop->loop_count
		210
		211	Return the number of times the event loop has polled for new
		212	events. Sometiems useful as a generation counter.
		213
		214	=item EV::once $fh_or_undef, $events, $timeout, $cb->($revents)
		215
		216	=item $loop->once ($fh_or_undef, $events, $timeout, $cb->($revents))
		217
		218	This function rolls together an I/O and a timer watcher for a single
		219	one-shot event without the need for managing a watcher object.
		220
		221	If C<$fh_or_undef> is a filehandle or file descriptor, then C<$events>
		222	must be a bitset containing either C<EV::READ>, C<EV::WRITE> or C<EV::READ
		223	\| EV::WRITE>, indicating the type of I/O event you want to wait for. If
		224	you do not want to wait for some I/O event, specify C<undef> for
		225	C<$fh_or_undef> and C<0> for C<$events>).
		226
		227	If timeout is C<undef> or negative, then there will be no
		228	timeout. Otherwise a EV::timer with this value will be started.
		229
		230	When an error occurs or either the timeout or I/O watcher triggers, then
		231	the callback will be called with the received event set (in general
		232	you can expect it to be a combination of C<EV::ERROR>, C<EV::READ>,
		233	C<EV::WRITE> and C<EV::TIMEOUT>).
		234
		235	EV::once doesn't return anything: the watchers stay active till either
		236	of them triggers, then they will be stopped and freed, and the callback
		237	invoked.
		238
		239	=item EV::feed_fd_event ($fd, $revents)
		240
		241	=item $loop->feed_fd_event ($fd, $revents)
		242
		243	Feed an event on a file descriptor into EV. EV will react to this call as
		244	if the readyness notifications specified by C<$revents> (a combination of
		245	C<EV::READ> and C<EV::WRITE>) happened on the file descriptor C<$fd>.
		246
		247	=item EV::feed_signal_event ($signal)
		248
		249	Feed a signal event into EV. EV will react to this call as if the signal
		250	specified by C<$signal> had occured.
		251
		252	=item EV::set_io_collect_interval $time
		253
		254	=item $loop->set_io_collect_interval ($time)
		255
		256	=item EV::set_timeout_collect_interval $time
		257
		258	=item $loop->set_timeout_collect_interval ($time)
		259
		260	These advanced functions set the minimum block interval when polling for I/O events and the minimum
		261	wait interval for timer events. See the libev documentation at
		262	L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#FUNCTIONS_CONTROLLING_THE_EVENT_LOOP> for
		263	a more detailed discussion.
		264
		265	=back
		266
		267
		268	=head1 WATCHER OBJECTS
128		269
129	A watcher is an object that gets created to record your interest in some	270	A watcher is an object that gets created to record your interest in some
130	event. For instance, if you want to wait for STDIN to become readable, you	271	event. For instance, if you want to wait for STDIN to become readable, you
131	would create an EV::io watcher for that:	272	would create an EV::io watcher for that:
132		273
133	my $watcher = EV::io *STDIN, EV::READ, sub {	274	my $watcher = EV::io *STDIN, EV::READ, sub {
134	my ($watcher, $revents) = @_;	275	my ($watcher, $revents) = @_;
135	warn "yeah, STDIN should not be readable without blocking!\n"	276	warn "yeah, STDIN should now be readable without blocking!\n"
136	};	277	};
137		278
138	All watchers can be active (waiting for events) or inactive (paused). Only	279	All watchers can be active (waiting for events) or inactive (paused). Only
139	active watchers will have their callbacks invoked. All callbacks will be	280	active watchers will have their callbacks invoked. All callbacks will be
140	called with at least two arguments: the watcher and a bitmask of received	281	called with at least two arguments: the watcher and a bitmask of received
141	events.	282	events.
142		283
143	Each watcher type has its associated bit in revents, so you can use the	284	Each watcher type has its associated bit in revents, so you can use the
144	same callback for multiple watchers. The event mask is named after the	285	same callback for multiple watchers. The event mask is named after the
145	type, i..e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,	286	type, i..e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,
146	EV::periodic sets EV::PERIODIC and so on, with the exception of IO events	287	EV::periodic sets EV::PERIODIC and so on, with the exception of I/O events
147	(which can set both EV::READ and EV::WRITE bits), and EV::timer (which	288	(which can set both EV::READ and EV::WRITE bits), and EV::timer (which
148	uses EV::TIMEOUT).	289	uses EV::TIMEOUT).
149		290
150	In the rare case where one wants to create a watcher but not start it at	291	In the rare case where one wants to create a watcher but not start it at
151	the same time, each constructor has a variant with a trailing C<_ns> in	292	the same time, each constructor has a variant with a trailing C<_ns> in
…		…
157		298
158	Also, all methods changing some aspect of a watcher (->set, ->priority,	299	Also, all methods changing some aspect of a watcher (->set, ->priority,
159	->fh and so on) automatically stop and start it again if it is active,	300	->fh and so on) automatically stop and start it again if it is active,
160	which means pending events get lost.	301	which means pending events get lost.
161		302
162	=head2 WATCHER TYPES	303	=head2 COMMON WATCHER METHODS
163		304
164	Now lets move to the existing watcher types and asociated methods.	305	This section lists methods common to all watchers.
165
166	The following methods are available for all watchers. Then followes a
167	description of each watcher constructor (EV::io, EV::timer, EV::periodic,
168	EV::signal, EV::child, EV::idle, EV::prepare and EV::check), followed by
169	any type-specific methods (if any).
170		306
171	=over 4	307	=over 4
172		308
173	=item $w->start	309	=item $w->start
174		310
…		…
178		314
179	=item $w->stop	315	=item $w->stop
180		316
181	Stop a watcher if it is active. Also clear any pending events (events that	317	Stop a watcher if it is active. Also clear any pending events (events that
182	have been received but that didn't yet result in a callback invocation),	318	have been received but that didn't yet result in a callback invocation),
183	regardless of wether the watcher was active or not.	319	regardless of whether the watcher was active or not.
184		320
185	=item $bool = $w->is_active	321	=item $bool = $w->is_active
186		322
187	Returns true if the watcher is active, false otherwise.	323	Returns true if the watcher is active, false otherwise.
		324
		325	=item $current_data = $w->data
		326
		327	=item $old_data = $w->data ($new_data)
		328
		329	Queries a freely usable data scalar on the watcher and optionally changes
		330	it. This is a way to associate custom data with a watcher:
		331
		332	my $w = EV::timer 60, 0, sub {
		333	warn $_[0]->data;
		334	};
		335	$w->data ("print me!");
188		336
189	=item $current_cb = $w->cb	337	=item $current_cb = $w->cb
190		338
191	=item $old_cb = $w->cb ($new_cb)	339	=item $old_cb = $w->cb ($new_cb)
192		340
…		…
197		345
198	=item $old_priority = $w->priority ($new_priority)	346	=item $old_priority = $w->priority ($new_priority)
199		347
200	Queries the priority on the watcher and optionally changes it. Pending	348	Queries the priority on the watcher and optionally changes it. Pending
201	watchers with higher priority will be invoked first. The valid range of	349	watchers with higher priority will be invoked first. The valid range of
202	priorities lies between EV::MAXPRI (default 3) and EV::MINPRI (default	350	priorities lies between EV::MAXPRI (default 2) and EV::MINPRI (default
203	-3). If the priority is outside this range it will automatically be	351	-2). If the priority is outside this range it will automatically be
204	normalised to the nearest valid priority.	352	normalised to the nearest valid priority.
205		353
206	The default priority of any newly-created weatcher is 0.	354	The default priority of any newly-created watcher is 0.
207		355
		356	Note that the priority semantics have not yet been fleshed out and are
		357	subject to almost certain change.
		358
208	=item $w->trigger ($revents)	359	=item $w->invoke ($revents)
209		360
210	Call the callback now with the given event mask.	361	Call the callback now with the given event mask.
211		362
		363	=item $w->feed_event ($revents)
		364
		365	Feed some events on this watcher into EV. EV will react to this call as if
		366	the watcher had received the given C<$revents> mask.
		367
		368	=item $revents = $w->clear_pending
		369
		370	If the watcher is pending, this function clears its pending status and
		371	returns its C<$revents> bitset (as if its callback was invoked). If the
		372	watcher isn't pending it does nothing and returns C<0>.
		373
		374	=item $previous_state = $w->keepalive ($bool)
		375
		376	Normally, C<EV::loop> will return when there are no active watchers
		377	(which is a "deadlock" because no progress can be made anymore). This is
		378	convinient because it allows you to start your watchers (and your jobs),
		379	call C<EV::loop> once and when it returns you know that all your jobs are
		380	finished (or they forgot to register some watchers for their task :).
		381
		382	Sometimes, however, this gets in your way, for example when the module
		383	that calls C<EV::loop> (usually the main program) is not the same module
		384	as a long-living watcher (for example a DNS client module written by
		385	somebody else even). Then you might want any outstanding requests to be
		386	handled, but you would not want to keep C<EV::loop> from returning just
		387	because you happen to have this long-running UDP port watcher.
		388
		389	In this case you can clear the keepalive status, which means that even
		390	though your watcher is active, it won't keep C<EV::loop> from returning.
		391
		392	The initial value for keepalive is true (enabled), and you cna change it
		393	any time.
		394
		395	Example: Register an I/O watcher for some UDP socket but do not keep the
		396	event loop from running just because of that watcher.
		397
		398	my $udp_socket = ...
		399	my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... };
		400	$1000udp_watcher->keepalive (0);
		401
		402	=item $loop = $w->loop
		403
		404	Return the loop that this watcher is attached to.
		405
		406	=back
		407
		408
		409	=head1 WATCHER TYPES
		410
		411	Each of the following subsections describes a single watcher type.
		412
		413	=head3 I/O WATCHERS - is this file descriptor readable or writable?
		414
		415	=over 4
212		416
213	=item $w = EV::io $fileno_or_fh, $eventmask, $callback	417	=item $w = EV::io $fileno_or_fh, $eventmask, $callback
214		418
215	=item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback	419	=item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback
216		420
		421	=item $w = $loop->io ($fileno_or_fh, $eventmask, $callback)
		422
		423	=item $w = $loop->io_ns ($fileno_or_fh, $eventmask, $callback)
		424
217	As long as the returned watcher object is alive, call the C<$callback>	425	As long as the returned watcher object is alive, call the C<$callback>
218	when the events specified in C<$eventmask>.	426	when at least one of events specified in C<$eventmask> occurs.
219		427
220	The $eventmask can be one or more of these constants ORed together:	428	The $eventmask can be one or more of these constants ORed together:
221		429
222	EV::READ wait until read() wouldn't block anymore	430	EV::READ wait until read() wouldn't block anymore
223	EV::WRITE wait until write() wouldn't block anymore	431	EV::WRITE wait until write() wouldn't block anymore
…		…
239		447
240	=item $old_eventmask = $w->events ($new_eventmask)	448	=item $old_eventmask = $w->events ($new_eventmask)
241		449
242	Returns the previously set event mask and optionally set a new one.	450	Returns the previously set event mask and optionally set a new one.
243		451
		452	=back
		453
		454
		455	=head3 TIMER WATCHERS - relative and optionally repeating timeouts
		456
		457	=over 4
244		458
245	=item $w = EV::timer $after, $repeat, $callback	459	=item $w = EV::timer $after, $repeat, $callback
246		460
247	=item $w = EV::timer_ns $after, $repeat, $callback	461	=item $w = EV::timer_ns $after, $repeat, $callback
248		462
249	Calls the callback after C<$after> seconds. If C<$repeat> is non-zero,	463	=item $w = $loop->timer ($after, $repeat, $callback)
250	the timer will be restarted (with the $repeat value as $after) after the	464
251	callback returns.	465	=item $w = $loop->timer_ns ($after, $repeat, $callback)
		466
		467	Calls the callback after C<$after> seconds (which may be fractional). If
		468	C<$repeat> is non-zero, the timer will be restarted (with the $repeat
		469	value as $after) after the callback returns.
252		470
253	This means that the callback would be called roughly after C<$after>	471	This means that the callback would be called roughly after C<$after>
254	seconds, and then every C<$repeat> seconds. "Roughly" because the time of	472	seconds, and then every C<$repeat> seconds. The timer does his best not
255	callback processing is not taken into account, so the timer will slowly	473	to drift, but it will not invoke the timer more often then once per event
256	drift. If that isn't acceptable, look at EV::periodic.	474	loop iteration, and might drift in other cases. If that isn't acceptable,
		475	look at EV::periodic, which can provide long-term stable timers.
257		476
258	The timer is based on a monotonic clock, that is if somebody is sitting	477	The timer is based on a monotonic clock, that is, if somebody is sitting
259	in front of the machine while the timer is running and changes the system	478	in front of the machine while the timer is running and changes the system
260	clock, the timer will nevertheless run (roughly) the same time.	479	clock, the timer will nevertheless run (roughly) the same time.
261		480
262	The C<timer_ns> variant doesn't start (activate) the newly created watcher.	481	The C<timer_ns> variant doesn't start (activate) the newly created watcher.
263		482
264	=item $w->set ($after, $repeat)	483	=item $w->set ($after, $repeat)
265		484
266	Reconfigures the watcher, see the constructor above for details. Can be at	485	Reconfigures the watcher, see the constructor above for details. Can be called at
267	any time.	486	any time.
268		487
269	=item $w->again	488	=item $w->again
270		489
271	Similar to the C<start> method, but has special semantics for repeating timers:	490	Similar to the C<start> method, but has special semantics for repeating timers:
		491
		492	If the timer is active and non-repeating, it will be stopped.
272		493
273	If the timer is active and repeating, reset the timeout to occur	494	If the timer is active and repeating, reset the timeout to occur
274	C<$repeat> seconds after now.	495	C<$repeat> seconds after now.
275		496
276	If the timer is active and non-repeating, it will be stopped.
277
278	If the timer is in active and repeating, start it.	497	If the timer is inactive and repeating, start it using the repeat value.
279		498
280	Otherwise do nothing.	499	Otherwise do nothing.
281		500
282	This behaviour is useful when you have a timeout for some IO	501	This behaviour is useful when you have a timeout for some IO
283	operation. You create a timer object with the same value for C<$after> and	502	operation. You create a timer object with the same value for C<$after> and
284	C<$repeat>, and then, in the read/write watcher, run the C<again> method	503	C<$repeat>, and then, in the read/write watcher, run the C<again> method
285	on the timeout.	504	on the timeout.
286		505
		506	=back
287		507
		508
		509	=head3 PERIODIC WATCHERS - to cron or not to cron?
		510
		511	=over 4
		512
288	=item $w = EV::periodic $at, $interval, $callback	513	=item $w = EV::periodic $at, $interval, $reschedule_cb, $callback
289		514
290	=item $w = EV::periodic_ns $at, $interval, $callback	515	=item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback
291		516
292	Similar to EV::timer, but the time is given as an absolute point in time	517	=item $w = $loop->periodic ($at, $interval, $reschedule_cb, $callback)
293	(C<$at>), plus an optional C<$interval>.
294		518
295	If the C<$interval> is zero, then the callback will be called at the time	519	=item $w = $loop->periodic_ns ($at, $interval, $reschedule_cb, $callback)
296	C<$at> if that is in the future, or as soon as possible if it is in the
297	past. It will not automatically repeat.
298		520
299	If the C<$interval> is nonzero, then the watcher will always be scheduled	521	Similar to EV::timer, but is not based on relative timeouts but on
300	to time out at the next C<$at + N * $interval> time.	522	absolute times. Apart from creating "simple" timers that trigger "at" the
		523	specified time, it can also be used for non-drifting absolute timers and
		524	more complex, cron-like, setups that are not adversely affected by time
		525	jumps (i.e. when the system clock is changed by explicit date -s or other
		526	means such as ntpd). It is also the most complex watcher type in EV.
301		527
302	This can be used to schedule a callback to run at very regular intervals,	528	It has three distinct "modes":
303	as long as the processing time is less then the interval (otherwise	529
304	obviously events will be skipped).	530	=over 4
		531
		532	=item * absolute timer ($interval = $reschedule_cb = 0)
		533
		534	This time simply fires at the wallclock time C<$at> and doesn't repeat. It
		535	will not adjust when a time jump occurs, that is, if it is to be run
		536	at January 1st 2011 then it will run when the system time reaches or
		537	surpasses this time.
		538
		539	=item * repeating interval timer ($interval > 0, $reschedule_cb = 0)
		540
		541	In this mode the watcher will always be scheduled to time out at the
		542	next C<$at + N * $interval> time (for some integer N) and then repeat,
		543	regardless of any time jumps.
		544
		545	This can be used to create timers that do not drift with respect to system
		546	time:
		547
		548	my $hourly = EV::periodic 0, 3600, 0, sub { print "once/hour\n" };
		549
		550	That doesn't mean there will always be 3600 seconds in between triggers,
		551	but only that the the clalback will be called when the system time shows a
		552	full hour (UTC).
305		553
306	Another way to think about it (for the mathematically inclined) is that	554	Another way to think about it (for the mathematically inclined) is that
307	EV::periodic will try to run the callback at the next possible time where	555	EV::periodic will try to run the callback in this mode at the next
308	C<$time = $at (mod $interval)>, regardless of any time jumps.	556	possible time where C<$time = $at (mod $interval)>, regardless of any time
		557	jumps.
309		558
310	This periodic timer is based on "wallclock time", that is, if the clock	559	=item * manual reschedule mode ($reschedule_cb = coderef)
311	changes (C<ntp>, C<date -s> etc.), then the timer will nevertheless run at	560
312	the specified time. This means it will never drift (it might jitter, but	561	In this mode $interval and $at are both being ignored. Instead, each
313	it will not drift).	562	time the periodic watcher gets scheduled, the reschedule callback
		563	($reschedule_cb) will be called with the watcher as first, and the current
		564	time as second argument.
		565
		566	I<This callback MUST NOT stop or destroy this or any other periodic
		567	watcher, ever>. If you need to stop it, return 1e30 and stop it
		568	afterwards.
		569
		570	It must return the next time to trigger, based on the passed time value
		571	(that is, the lowest time value larger than to the second argument). It
		572	will usually be called just before the callback will be triggered, but
		573	might be called at other times, too.
		574
		575	This can be used to create very complex timers, such as a timer that
		576	triggers on each midnight, local time (actually 24 hours after the last
		577	midnight, to keep the example simple. If you know a way to do it correctly
		578	in about the same space (without requiring elaborate modules), drop me a
		579	note :):
		580
		581	my $daily = EV::periodic 0, 0, sub {
		582	my ($w, $now) = @_;
		583
		584	use Time::Local ();
		585	my (undef, undef, undef, $d, $m, $y) = localtime $now;
		586	86400 + Time::Local::timelocal 0, 0, 0, $d, $m, $y
		587	}, sub {
		588	print "it's midnight or likely shortly after, now\n";
		589	};
		590
		591	=back
314		592
315	The C<periodic_ns> variant doesn't start (activate) the newly created watcher.	593	The C<periodic_ns> variant doesn't start (activate) the newly created watcher.
316		594
317	=item $w->set ($at, $interval)	595	=item $w->set ($at, $interval, $reschedule_cb)
318		596
319	Reconfigures the watcher, see the constructor above for details. Can be at	597	Reconfigures the watcher, see the constructor above for details. Can be called at
320	any time.	598	any time.
321		599
		600	=item $w->again
		601
		602	Simply stops and starts the watcher again.
		603
		604	=item $time = $w->at
		605
		606	Return the time that the watcher is expected to trigger next.
		607
		608	=back
		609
		610
		611	=head3 SIGNAL WATCHERS - signal me when a signal gets signalled!
		612
		613	=over 4
322		614
323	=item $w = EV::signal $signal, $callback	615	=item $w = EV::signal $signal, $callback
324		616
325	=item $w = EV::signal_ns $signal, $callback	617	=item $w = EV::signal_ns $signal, $callback
326		618
327	Call the callback when $signal is received (the signal can be specified	619	Call the callback when $signal is received (the signal can be specified by
328	by number or by name, just as with kill or %SIG).	620	number or by name, just as with C<kill> or C<%SIG>).
329		621
330	EV will grab the signal for the process (the kernel only allows one	622	EV will grab the signal for the process (the kernel only allows one
331	component to receive a signal at a time) when you start a signal watcher,	623	component to receive a signal at a time) when you start a signal watcher,
332	and removes it again when you stop it. Perl does the same when you	624	and removes it again when you stop it. Perl does the same when you
333	add/remove callbacks to %SIG, so watch out.	625	add/remove callbacks to C<%SIG>, so watch out.
334		626
335	You can have as many signal watchers per signal as you want.	627	You can have as many signal watchers per signal as you want.
336		628
337	The C<signal_ns> variant doesn't start (activate) the newly created watcher.	629	The C<signal_ns> variant doesn't start (activate) the newly created watcher.
338		630
339	=item $w->set ($signal)	631	=item $w->set ($signal)
340		632
341	Reconfigures the watcher, see the constructor above for details. Can be at	633	Reconfigures the watcher, see the constructor above for details. Can be
342	any time.	634	called at any time.
343		635
344	=item $current_signum = $w->signal	636	=item $current_signum = $w->signal
345		637
346	=item $old_signum = $w->signal ($new_signal)	638	=item $old_signum = $w->signal ($new_signal)
347		639
348	Returns the previously set signal (always as a number not name) and	640	Returns the previously set signal (always as a number not name) and
349	optionally set a new one.	641	optionally set a new one.
350		642
		643	=back
351		644
		645
		646	=head3 CHILD WATCHERS - watch out for process status changes
		647
		648	=over 4
		649
352	=item $w = EV::child $pid, $callback	650	=item $w = EV::child $pid, $trace, $callback
353		651
354	=item $w = EV::child_ns $pid, $callback	652	=item $w = EV::child_ns $pid, $trace, $callback
		653
		654	=item $w = $loop->child ($pid, $trace, $callback)
		655
		656	=item $w = $loop->child_ns ($pid, $trace, $callback)
355		657
356	Call the callback when a status change for pid C<$pid> (or any pid	658	Call the callback when a status change for pid C<$pid> (or any pid
357	if C<$pid> is 0) has been received. More precisely: when the process	659	if C<$pid> is 0) has been received (a status change happens when the
		660	process terminates or is killed, or, when trace is true, additionally when
		661	it is stopped or continued). More precisely: when the process receives
358	receives a SIGCHLD, EV will fetch the outstanding exit/wait status for all	662	a C<SIGCHLD>, EV will fetch the outstanding exit/wait status for all
359	changed/zombie children and call the callback.	663	changed/zombie children and call the callback.
360		664
361	Unlike all other callbacks, this callback will be called with an	665	It is valid (and fully supported) to install a child watcher after a child
362	additional third argument which is the exit status. See the C<waitpid>	666	has exited but before the event loop has started its next iteration (for
363	function for details.	667	example, first you C<fork>, then the new child process might exit, and
		668	only then do you install a child watcher in the parent for the new pid).
364		669
		670	You can access both exit (or tracing) status and pid by using the
		671	C<rstatus> and C<rpid> methods on the watcher object.
		672
365	You can have as many pid watchers per pid as you want.	673	You can have as many pid watchers per pid as you want, they will all be
		674	called.
366		675
367	The C<child_ns> variant doesn't start (activate) the newly created watcher.	676	The C<child_ns> variant doesn't start (activate) the newly created watcher.
368		677
369	=item $w->set ($pid)	678	=item $w->set ($pid, $trace)
370		679
371	Reconfigures the watcher, see the constructor above for details. Can be at	680	Reconfigures the watcher, see the constructor above for details. Can be called at
372	any time.	681	any time.
373		682
374	=item $current_pid = $w->pid	683	=item $current_pid = $w->pid
375		684
376	=item $old_pid = $w->pid ($new_pid)
377
378	Returns the previously set process id and optionally set a new one.	685	Returns the previously set process id and optionally set a new one.
379		686
		687	=item $exit_status = $w->rstatus
		688
		689	Return the exit/wait status (as returned by waitpid, see the waitpid entry
		690	in perlfunc).
		691
		692	=item $pid = $w->rpid
		693
		694	Return the pid of the awaited child (useful when you have installed a
		695	watcher for all pids).
		696
		697	=back
		698
		699
		700	=head3 STAT WATCHERS - did the file attributes just change?
		701
		702	=over 4
		703
		704	=item $w = EV::stat $path, $interval, $callback
		705
		706	=item $w = EV::stat_ns $path, $interval, $callback
		707
		708	=item $w = $loop->stat ($path, $interval, $callback)
		709
		710	=item $w = $loop->stat_ns ($path, $interval, $callback)
		711
		712	Call the callback when a file status change has been detected on
		713	C<$path>. The C<$path> does not need to exist, changing from "path exists"
		714	to "path does not exist" is a status change like any other.
		715
		716	The C<$interval> is a recommended polling interval for systems where
		717	OS-supported change notifications don't exist or are not supported. If
		718	you use C<0> then an unspecified default is used (which is highly
		719	recommended!), which is to be expected to be around five seconds usually.
		720
		721	This watcher type is not meant for massive numbers of stat watchers,
		722	as even with OS-supported change notifications, this can be
		723	resource-intensive.
		724
		725	The C<stat_ns> variant doesn't start (activate) the newly created watcher.
		726
		727	=item ... = $w->stat
		728
		729	This call is very similar to the perl C<stat> built-in: It stats (using
		730	C<lstat>) the path specified in the watcher and sets perls stat cache (as
		731	well as EV's idea of the current stat values) to the values found.
		732
		733	In scalar context, a boolean is return indicating success or failure of
		734	the stat. In list context, the same 13-value list as with stat is returned
		735	(except that the blksize and blocks fields are not reliable).
		736
		737	In the case of an error, errno is set to C<ENOENT> (regardless of the
		738	actual error value) and the C<nlink> value is forced to zero (if the stat
		739	was successful then nlink is guaranteed to be non-zero).
		740
		741	See also the next two entries for more info.
		742
		743	=item ... = $w->attr
		744
		745	Just like C<< $w->stat >>, but without the initial stat'ing: this returns
		746	the values most recently detected by EV. See the next entry for more info.
		747
		748	=item ... = $w->prev
		749
		750	Just like C<< $w->stat >>, but without the initial stat'ing: this returns
		751	the previous set of values, before the change.
		752
		753	That is, when the watcher callback is invoked, C<< $w->prev >> will be set
		754	to the values found I<before> a change was detected, while C<< $w->attr >>
		755	returns the values found leading to the change detection. The difference (if any)
		756	between C<prev> and C<attr> is what triggered the callback.
		757
		758	If you did something to the filesystem object and do not want to trigger
		759	yet another change, you can call C<stat> to update EV's idea of what the
		760	current attributes are.
		761
		762	=item $w->set ($path, $interval)
		763
		764	Reconfigures the watcher, see the constructor above for details. Can be
		765	called at any time.
		766
		767	=item $current_path = $w->path
		768
		769	=item $old_path = $w->path ($new_path)
		770
		771	Returns the previously set path and optionally set a new one.
		772
		773	=item $current_interval = $w->interval
		774
		775	=item $old_interval = $w->interval ($new_interval)
		776
		777	Returns the previously set interval and optionally set a new one. Can be
		778	used to query the actual interval used.
		779
		780	=back
		781
		782
		783	=head3 IDLE WATCHERS - when you've got nothing better to do...
		784
		785	=over 4
380		786
381	=item $w = EV::idle $callback	787	=item $w = EV::idle $callback
382		788
383	=item $w = EV::idle_ns $callback	789	=item $w = EV::idle_ns $callback
384		790
385	Call the callback when there are no pending io, timer/periodic, signal or	791	=item $w = $loop->idle ($callback)
386	child events, i.e. when the process is idle.	792
		793	=item $w = $loop->idle_ns ($callback)
		794
		795	Call the callback when there are no other pending watchers of the same or
		796	higher priority (excluding check, prepare and other idle watchers of the
		797	same or lower priority, of course). They are called idle watchers because
		798	when the watcher is the highest priority pending event in the process, the
		799	process is considered to be idle at that priority.
		800
		801	If you want a watcher that is only ever called when I<no> other events are
		802	outstanding you have to set the priority to C<EV::MINPRI>.
387		803
388	The process will not block as long as any idle watchers are active, and	804	The process will not block as long as any idle watchers are active, and
389	they will be called repeatedly until stopped.	805	they will be called repeatedly until stopped.
390		806
		807	For example, if you have idle watchers at priority C<0> and C<1>, and
		808	an I/O watcher at priority C<0>, then the idle watcher at priority C<1>
		809	and the I/O watcher will always run when ready. Only when the idle watcher
		810	at priority C<1> is stopped and the I/O watcher at priority C<0> is not
		811	pending with the C<0>-priority idle watcher be invoked.
		812
391	The C<idle_ns> variant doesn't start (activate) the newly created watcher.	813	The C<idle_ns> variant doesn't start (activate) the newly created watcher.
392		814
		815	=back
		816
		817
		818	=head3 PREPARE WATCHERS - customise your event loop!
		819
		820	=over 4
393		821
394	=item $w = EV::prepare $callback	822	=item $w = EV::prepare $callback
395		823
396	=item $w = EV::prepare_ns $callback	824	=item $w = EV::prepare_ns $callback
		825
		826	=item $w = $loop->prepare ($callback)
		827
		828	=item $w = $loop->prepare_ns ($callback)
397		829
398	Call the callback just before the process would block. You can still	830	Call the callback just before the process would block. You can still
399	create/modify any watchers at this point.	831	create/modify any watchers at this point.
400		832
401	See the EV::check watcher, below, for explanations and an example.	833	See the EV::check watcher, below, for explanations and an example.
402		834
403	The C<prepare_ns> variant doesn't start (activate) the newly created watcher.	835	The C<prepare_ns> variant doesn't start (activate) the newly created watcher.
404		836
		837	=back
		838
		839
		840	=head3 CHECK WATCHERS - customise your event loop even more!
		841
		842	=over 4
405		843
406	=item $w = EV::check $callback	844	=item $w = EV::check $callback
407		845
408	=item $w = EV::check_ns $callback	846	=item $w = EV::check_ns $callback
		847
		848	=item $w = $loop->check ($callback)
		849
		850	=item $w = $loop->check_ns ($callback)
409		851
410	Call the callback just after the process wakes up again (after it has	852	Call the callback just after the process wakes up again (after it has
411	gathered events), but before any other callbacks have been invoked.	853	gathered events), but before any other callbacks have been invoked.
412		854
413	This is used to integrate other event-based software into the EV	855	This is used to integrate other event-based software into the EV
…		…
421	# do nothing unless active	863	# do nothing unless active
422	$dispatcher->{_event_queue_h}	864	$dispatcher->{_event_queue_h}
423	or return;	865	or return;
424		866
425	# make the dispatcher handle any outstanding stuff	867	# make the dispatcher handle any outstanding stuff
		868	... not shown
426		869
427	# create an IO watcher for each and every socket	870	# create an I/O watcher for each and every socket
428	@snmp_watcher = (	871	@snmp_watcher = (
429	(map { EV::io $_, EV::READ, sub { } }	872	(map { EV::io $_, EV::READ, sub { } }
430	keys %{ $dispatcher->{_descriptors} }),	873	keys %{ $dispatcher->{_descriptors} }),
		874
		875	EV::timer +($event->[Net::SNMP::Dispatcher::_ACTIVE]
		876	? $event->[Net::SNMP::Dispatcher::_TIME] - EV::now : 0),
		877	0, sub { },
431	);	878	);
432
433	# if there are any timeouts, also create a timer
434	push @snmp_watcher, EV::timer $event->[Net::SNMP::Dispatcher::_TIME] - EV::now, 0, sub { }
435	if $event->[Net::SNMP::Dispatcher::_ACTIVE];
436	};	879	};
437		880
438	The callbacks are irrelevant, the only purpose of those watchers is	881	The callbacks are irrelevant (and are not even being called), the
439	to wake up the process as soon as one of those events occurs (socket	882	only purpose of those watchers is to wake up the process as soon as
440	readable, or timer timed out). The corresponding EV::check watcher will then	883	one of those events occurs (socket readable, or timer timed out). The
441	clean up:	884	corresponding EV::check watcher will then clean up:
442		885
443	our $snmp_check = EV::check sub {	886	our $snmp_check = EV::check sub {
444	# destroy all watchers	887	# destroy all watchers
445	@snmp_watcher = ();	888	@snmp_watcher = ();
446		889
447	# make the dispatcher handle any new stuff	890	# make the dispatcher handle any new stuff
		891	... not shown
448	};	892	};
449		893
450	The callbacks of the created watchers will not be called as the watchers	894	The callbacks of the created watchers will not be called as the watchers
451	are destroyed before this cna happen (remember EV::check gets called	895	are destroyed before this cna happen (remember EV::check gets called
452	first).	896	first).
453		897
454	The C<check_ns> variant doesn't start (activate) the newly created watcher.	898	The C<check_ns> variant doesn't start (activate) the newly created watcher.
455		899
456	=back	900	=back
457		901
		902
		903	=head3 FORK WATCHERS - the audacity to resume the event loop after a fork
		904
		905	Fork watchers are called when a C<fork ()> was detected. The invocation
		906	is done before the event loop blocks next and before C<check> watchers
		907	are being called, and only in the child after the fork.
		908
		909	=over 4
		910
		911	=item $w = EV::fork $callback
		912
		913	=item $w = EV::fork_ns $callback
		914
		915	=item $w = $loop->fork ($callback)
		916
		917	=item $w = $loop->fork_ns ($callback)
		918
		919	Call the callback before the event loop is resumed in the child process
		920	after a fork.
		921
		922	The C<fork_ns> variant doesn't start (activate) the newly created watcher.
		923
		924	=back
		925
		926
		927	=head3 EMBED WATCHERS - when one backend isn't enough...
		928
		929	This is a rather advanced watcher type that lets you embed one event loop
		930	into another (currently only IO events are supported in the embedded
		931	loop, other types of watchers might be handled in a delayed or incorrect
		932	fashion and must not be used).
		933
		934	See the libev documentation at
		935	L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#code_ev_embed_code_when_one_backend_>
		936	for more details.
		937
		938	In short, this watcher is most useful on BSD systems without working
		939	kqueue to still be able to handle a large number of sockets:
		940
		941	my $socket_loop;
		942
		943	# check wether we use SELECT or POLL _and_ KQUEUE is supported
		944	if (
		945	(EV::backend & (EV::BACKEND_POLL \| EV::BACKEND_SELECT))
		946	&& (EV::supported_backends & EV::embeddable_backends & EV::BACKEND_KQUEUE)
		947	) {
		948	# use kqueue for sockets
		949	$socket_loop = new EV::Loop EV::BACKEND_KQUEUE \| EV::FLAG_NOENV;
		950	}
		951
		952	# use the default loop otherwise
		953	$socket_loop \|\|= EV::default_loop;
		954
		955	=over 4
		956
		957	=item $w = EV::embed $otherloop, $callback
		958
		959	=item $w = EV::embed_ns $otherloop, $callback
		960
		961	=item $w = $loop->embed ($otherloop, $callback)
		962
		963	=item $w = $loop->embed_ns ($otherloop, $callback)
		964
		965	Call the callback when the embedded event loop (C<$otherloop>) has any
		966	I/O activity. The C<$callback> should alwas be specified as C<undef> in
		967	this version of EV, which means the embedded event loop will be managed
		968	automatically.
		969
		970	The C<embed_ns> variant doesn't start (activate) the newly created watcher.
		971
		972	=back
		973
		974	=head3 ASYNC WATCHERS - how to wake up another event loop
		975
		976	Async watchers are provided by EV, but have little use in perl directly, as perl
		977	neither supports threads nor direct access to signal handlers or other
		978	contexts where they could be of value.
		979
		980	It is, however, possible to use them from the XS level.
		981
		982	Please see the libev documentation for further details.
		983
		984	=over 4
		985
		986	=item $w = EV::async $callback
		987
		988	=item $w = EV::async_ns $callback
		989
		990	=item $w->send
		991
		992	=item $bool = $w->async_pending
		993
		994	=back
		995
		996
		997	=head1 PERL SIGNALS
		998
		999	While Perl signal handling (C<%SIG>) is not affected by EV, the behaviour
		1000	with EV is as the same as any other C library: Perl-signals will only be
		1001	handled when Perl runs, which means your signal handler might be invoked
		1002	only the next time an event callback is invoked.
		1003
		1004	The solution is to use EV signal watchers (see C<EV::signal>), which will
		1005	ensure proper operations with regards to other event watchers.
		1006
		1007	If you cannot do this for whatever reason, you can also force a watcher
		1008	to be called on every event loop iteration by installing a C<EV::check>
		1009	watcher:
		1010
		1011	my $async_check = EV::check sub { };
		1012
		1013	This ensures that perl gets into control for a short time to handle any
		1014	pending signals, and also ensures (slightly) slower overall operation.
		1015
458	=head1 THREADS	1016	=head1 THREADS
459		1017
460	Threads are not supported by this in any way. Perl pseudo-threads is evil	1018	Threads are not supported by this module in any way. Perl pseudo-threads
461	stuff and must die.	1019	is evil stuff and must die. As soon as Perl gains real threads I will work
		1020	on thread support for it.
		1021
		1022	=head1 FORK
		1023
		1024	Most of the "improved" event delivering mechanisms of modern operating
		1025	systems have quite a few problems with fork(2) (to put it bluntly: it is
		1026	not supported and usually destructive). Libev makes it possible to work
		1027	around this by having a function that recreates the kernel state after
		1028	fork in the child.
		1029
		1030	On non-win32 platforms, this module requires the pthread_atfork
		1031	functionality to do this automatically for you. This function is quite
		1032	buggy on most BSDs, though, so YMMV. The overhead for this is quite
		1033	negligible, because everything the function currently does is set a flag
		1034	that is checked only when the event loop gets used the next time, so when
		1035	you do fork but not use EV, the overhead is minimal.
		1036
		1037	On win32, there is no notion of fork so all this doesn't apply, of course.
462		1038
463	=cut	1039	=cut
464		1040
465	our $DIED = sub {	1041	our $DIED = sub {
466	warn "EV: error in callback (ignoring): $@";	1042	warn "EV: error in callback (ignoring): $@";
467	};	1043	};
468		1044
469	init;	1045	default_loop
470		1046	or die 'EV: cannot initialise libev backend. bad $ENV{LIBEV_FLAGS}?';
471	push @AnyEvent::REGISTRY, [EV => "EV::AnyEvent"];
472		1047
473	1;	1048	1;
474		1049
475	=head1 SEE ALSO	1050	=head1 SEE ALSO
476		1051
477	L<EV::DNS>, L<EV::AnyEvent>.	1052	L<EV::ADNS> (asynchronous DNS), L<Glib::EV> (makes Glib/Gtk2 use EV as
		1053	event loop), L<EV::Glib> (embed Glib into EV), L<Coro::EV> (efficient
		1054	coroutines with EV), L<Net::SNMP::EV> (asynchronous SNMP).
478		1055
479	=head1 AUTHOR	1056	=head1 AUTHOR
480		1057
481	Marc Lehmann <schmorp@schmorp.de>	1058	Marc Lehmann <schmorp@schmorp.de>
482	http://home.schmorp.de/	1059	http://home.schmorp.de/

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Comparing EV/EV.pm (file contents): Revision 1.23 by root, Fri Nov 2 20:21:33 2007 UTC vs. Revision 1.88 by root, Wed Apr 16 17:08:29 2008 UTC

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Comparing EV/EV.pm (file contents):
Revision 1.23 by root, Fri Nov 2 20:21:33 2007 UTC vs.
Revision 1.88 by root, Wed Apr 16 17:08:29 2008 UTC