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

Comparing EV/EV.pm (file contents):
Revision 1.56 by root, Tue Nov 27 10:59:10 2007 UTC vs.
Revision 1.134 by root, Tue Jan 11 13:45:28 2011 UTC

…		…
2		2
3	EV - perl interface to libev, a high performance full-featured event loop	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
		9	# TIMERS
		10
		11	my $w = EV::timer 2, 0, sub {
		12	warn "is called after 2s";
		13	};
		14
		15	my $w = EV::timer 2, 2, sub {
		16	warn "is called roughly every 2s (repeat = 2)";
		17	};
		18
		19	undef $w; # destroy event watcher again
		20
		21	my $w = EV::periodic 0, 60, 0, sub {
		22	warn "is called every minute, on the minute, exactly";
		23	};
		24
		25	# IO
		26
		27	my $w = EV::io *STDIN, EV::READ, sub {
		28	my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
		29	warn "stdin is readable, you entered: ", <STDIN>;
		30	};
		31
		32	# SIGNALS
		33
		34	my $w = EV::signal 'QUIT', sub {
		35	warn "sigquit received\n";
		36	};
		37
		38	# CHILD/PID STATUS CHANGES
8		39
9	# TIMERS	40	my $w = EV::child 666, 0, sub {
		41	my ($w, $revents) = @_;
		42	my $status = $w->rstatus;
		43	};
10		44
11	my $w = EV::timer 2, 0, sub {
12	warn "is called after 2s";
13	};
14
15	my $w = EV::timer 2, 2, sub {
16	warn "is called roughly every 2s (repeat = 2)";
17	};
18
19	undef $w; # destroy event watcher again
20
21	my $w = EV::periodic 0, 60, 0, sub {
22	warn "is called every minute, on the minute, exactly";
23	};
24
25	# IO
26
27	my $w = EV::io *STDIN, EV::READ, sub {
28	my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
29	warn "stdin is readable, you entered: ", <STDIN>;
30	};
31
32	# SIGNALS
33
34	my $w = EV::signal 'QUIT', sub {
35	warn "sigquit received\n";
36	};
37
38	# CHILD/PID STATUS CHANGES
39
40	my $w = EV::child 666, sub {
41	my ($w, $revents) = @_;
42	my $status = $w->rstatus;
43	};
44
45	# STAT CHANGES	45	# STAT CHANGES
46	my $w = EV::stat "/etc/passwd", 10, sub {	46	my $w = EV::stat "/etc/passwd", 10, sub {
47	my ($w, $revents) = @_;	47	my ($w, $revents) = @_;
48	warn $w->path, " has changed somehow.\n";	48	warn $w->path, " has changed somehow.\n";
49	};	49	};
50		50
51	# MAINLOOP	51	# MAINLOOP
52	EV::loop; # loop until EV::unloop is called or all watchers stop	52	EV::loop; # loop until EV::unloop is called or all watchers stop
53	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
54	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
		55
		56	=head1 BEFORE YOU START USING THIS MODULE
		57
		58	If you only need timer, I/O, signal, child and idle watchers and not the
		59	advanced functionality of this module, consider using L<AnyEvent> instead,
		60	specifically the simplified API described in L<AE>.
		61
		62	When used with EV as backend, the L<AE> API is as fast as the native L<EV>
		63	API, but your programs/modules will still run with many other event loops.
55		64
56	=head1 DESCRIPTION	65	=head1 DESCRIPTION
57		66
58	This module provides an interface to libev	67	This module provides an interface to libev
59	(L<http://software.schmorp.de/pkg/libev.html>). While the documentation	68	(L<http://software.schmorp.de/pkg/libev.html>). While the documentation
60	below is comprehensive, one might also consult the documentation of libev	69	below is comprehensive, one might also consult the documentation of
61	itself (L<http://cvs.schmorp.de/libev/ev.html>) for more subtle details on	70	libev itself (L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod> or
62	watcher semantics or some discussion on the available backends, or how to	71	F<perldoc EV::libev>) for more subtle details on watcher semantics or some
63	force a specific backend with C<LIBEV_FLAGS>.	72	discussion on the available backends, or how to force a specific backend
		73	with C<LIBEV_FLAGS>, or just about in any case because it has much more
		74	detailed information.
		75
		76	This module is very fast and scalable. It is actually so fast that you
		77	can use it through the L<AnyEvent> module, stay portable to other event
		78	loops (if you don't rely on any watcher types not available through it)
		79	and still be faster than with any other event loop currently supported in
		80	Perl.
		81
		82	=head2 PORTING FROM EV 3.X to 4.X
		83
		84	EV version 4 introduces a number of incompatible changes summarised
		85	here. According to the depreciation strategy used by libev, there is a
		86	compatibility layer in place so programs should continue to run unchanged
		87	(the XS interface lacks this layer, so programs using that one need to be
		88	updated).
		89
		90	This compatibility layer will be switched off in some future release.
		91
		92	All changes relevant to Perl are renames of symbols, functions and
		93	methods:
		94
		95	EV::loop => EV::run
		96	EV::LOOP_NONBLOCK => EV::RUN_NOWAIT
		97	EV::LOOP_ONESHOT => EV::RUN_ONCE
		98
		99	EV::unloop => EV::break
		100	EV::UNLOOP_CANCEL => EV::BREAK_CANCEL
		101	EV::UNLOOP_ONE => EV::BREAK_ONE
		102	EV::UNLOOP_ALL => EV::BREAK_ALL
		103
		104	EV::TIMEOUT => EV::TIMER
		105
		106	EV::loop_count => EV::iteration
		107	EV::loop_depth => EV::depth
		108	EV::loop_verify => EV::verify
		109
		110	The loop object methods corresponding to the functions above have been
		111	similarly renamed.
		112
		113	=head2 MODULE EXPORTS
		114
		115	This module does not export any symbols.
64		116
65	=cut	117	=cut
66		118
67	package EV;	119	package EV;
68		120
69	use strict;	121	use common::sense;
70		122
71	BEGIN {	123	BEGIN {
72	our $VERSION = '1.4';	124	our $VERSION = '4.03';
73	use XSLoader;	125	use XSLoader;
74	XSLoader::load "EV", $VERSION;	126	XSLoader::load "EV", $VERSION;
75	}	127	}
76		128
77	@EV::IO::ISA =	129	@EV::IO::ISA =
…		…
83	@EV::Idle::ISA =	135	@EV::Idle::ISA =
84	@EV::Prepare::ISA =	136	@EV::Prepare::ISA =
85	@EV::Check::ISA =	137	@EV::Check::ISA =
86	@EV::Embed::ISA =	138	@EV::Embed::ISA =
87	@EV::Fork::ISA =	139	@EV::Fork::ISA =
		140	@EV::Async::ISA =
88	"EV::Watcher";	141	"EV::Watcher";
89		142
		143	@EV::Loop::Default::ISA = "EV::Loop";
		144
		145	=head1 EVENT LOOPS
		146
		147	EV supports multiple event loops: There is a single "default event loop"
		148	that can handle everything including signals and child watchers, and any
		149	number of "dynamic event loops" that can use different backends (with
		150	various limitations), but no child and signal watchers.
		151
		152	You do not have to do anything to create the default event loop: When
		153	the module is loaded a suitable backend is selected on the premise of
		154	selecting a working backend (which for example rules out kqueue on most
		155	BSDs). Modules should, unless they have "special needs" always use the
		156	default loop as this is fastest (perl-wise), best supported by other
		157	modules (e.g. AnyEvent or Coro) and most portable event loop.
		158
		159	For specific programs you can create additional event loops dynamically.
		160
		161	If you want to take advantage of kqueue (which often works properly for
		162	sockets only) even though the default loop doesn't enable it, you can
		163	I<embed> a kqueue loop into the default loop: running the default loop
		164	will then also service the kqueue loop to some extent. See the example in
		165	the section about embed watchers for an example on how to achieve that.
		166
		167	=over 4
		168
		169	=item $loop = new EV::Loop [$flags]
		170
		171	Create a new event loop as per the specified flags. Please refer to
		172	the C<ev_loop_new ()> function description in the libev documentation
		173	(L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#GLOBAL_FUNCTIONS>,
		174	or locally-installed as F<EV::libev> manpage) for more info.
		175
		176	The loop will automatically be destroyed when it is no longer referenced
		177	by any watcher and the loop object goes out of scope.
		178
		179	If you are not embedding the loop, then Using C<EV::FLAG_FORKCHECK>
		180	is recommended, as only the default event loop is protected by this
		181	module. If you I<are> embedding this loop in the default loop, this is not
		182	necessary, as C<EV::embed> automatically does the right thing on fork.
		183
		184	=item $loop->loop_fork
		185
		186	Must be called after a fork in the child, before entering or continuing
		187	the event loop. An alternative is to use C<EV::FLAG_FORKCHECK> which calls
		188	this function automatically, at some performance loss (refer to the libev
		189	documentation).
		190
		191	=item $loop->loop_verify
		192
		193	Calls C<ev_verify> to make internal consistency checks (for debugging
		194	libev) and abort the program if any data structures were found to be
		195	corrupted.
		196
		197	=item $loop = EV::default_loop [$flags]
		198
		199	Return the default loop (which is a singleton object). Since this module
		200	already creates the default loop with default flags, specifying flags here
		201	will not have any effect unless you destroy the default loop first, which
		202	isn't supported. So in short: don't do it, and if you break it, you get to
		203	keep the pieces.
		204
		205	=back
		206
		207
90	=head1 BASIC INTERFACE	208	=head1 BASIC INTERFACE
91		209
92	=over 4	210	=over 4
93		211
94	=item $EV::DIED	212	=item $EV::DIED
95		213
96	Must contain a reference to a function that is called when a callback	214	Must contain a reference to a function that is called when a callback
97	throws an exception (with $@ containing thr error). The default prints an	215	throws an exception (with $@ containing the error). The default prints an
98	informative message and continues.	216	informative message and continues.
99		217
100	If this callback throws an exception it will be silently ignored.	218	If this callback throws an exception it will be silently ignored.
101		219
		220	=item $flags = EV::supported_backends
		221
		222	=item $flags = EV::recommended_backends
		223
		224	=item $flags = EV::embeddable_backends
		225
		226	Returns the set (see C<EV::BACKEND_*> flags) of backends supported by this
		227	instance of EV, the set of recommended backends (supposed to be good) for
		228	this platform and the set of embeddable backends (see EMBED WATCHERS).
		229
		230	=item EV::sleep $seconds
		231
		232	Block the process for the given number of (fractional) seconds.
		233
102	=item $time = EV::time	234	=item $time = EV::time
103		235
104	Returns the current time in (fractional) seconds since the epoch.	236	Returns the current time in (fractional) seconds since the epoch.
105		237
106	=item $time = EV::now	238	=item $time = EV::now
107		239
		240	=item $time = $loop->now
		241
108	Returns the time the last event loop iteration has been started. This	242	Returns the time the last event loop iteration has been started. This
109	is the time that (relative) timers are based on, and refering to it is	243	is the time that (relative) timers are based on, and referring to it is
110	usually faster then calling EV::time.	244	usually faster then calling EV::time.
111		245
112	=item $method = EV::method	246	=item EV::now_update
113		247
		248	=item $loop->now_update
		249
		250	Establishes the current time by querying the kernel, updating the time
		251	returned by C<EV::now> in the progress. This is a costly operation and
		252	is usually done automatically within C<EV::loop>.
		253
		254	This function is rarely useful, but when some event callback runs for a
		255	very long time without entering the event loop, updating libev's idea of
		256	the current time is a good idea.
		257
		258	=item EV::suspend
		259
		260	=item $loop->suspend
		261
		262	=item EV::resume
		263
		264	=item $loop->resume
		265
		266	These two functions suspend and resume a loop, for use when the loop is
		267	not used for a while and timeouts should not be processed.
		268
		269	A typical use case would be an interactive program such as a game: When
		270	the user presses C<^Z> to suspend the game and resumes it an hour later it
		271	would be best to handle timeouts as if no time had actually passed while
		272	the program was suspended. This can be achieved by calling C<suspend>
		273	in your C<SIGTSTP> handler, sending yourself a C<SIGSTOP> and calling
		274	C<resume> directly afterwards to resume timer processing.
		275
		276	Effectively, all C<timer> watchers will be delayed by the time spend
		277	between C<suspend> and C<resume>, and all C<periodic> watchers
		278	will be rescheduled (that is, they will lose any events that would have
		279	occured while suspended).
		280
		281	After calling C<suspend> you B<must not> call I<any> function on the given
		282	loop other than C<resume>, and you B<must not> call C<resume>
		283	without a previous call to C<suspend>.
		284
		285	Calling C<suspend>/C<resume> has the side effect of updating the event
		286	loop time (see C<now_update>).
		287
		288	=item $backend = EV::backend
		289
		290	=item $backend = $loop->backend
		291
114	Returns an integer describing the backend used by libev (EV::METHOD_SELECT	292	Returns an integer describing the backend used by libev (EV::BACKEND_SELECT
115	or EV::METHOD_EPOLL).	293	or EV::BACKEND_EPOLL).
116		294
117	=item EV::loop [$flags]	295	=item EV::loop [$flags]
		296
		297	=item $loop->loop ([$flags])
118		298
119	Begin checking for events and calling callbacks. It returns when a	299	Begin checking for events and calling callbacks. It returns when a
120	callback calls EV::unloop.	300	callback calls EV::unloop.
121		301
122	The $flags argument can be one of the following:	302	The $flags argument can be one of the following:
123		303
124	0 as above	304	0 as above
125	EV::LOOP_ONESHOT block at most once (wait, but do not loop)	305	EV::LOOP_ONCE block at most once (wait, but do not loop)
126	EV::LOOP_NONBLOCK do not block at all (fetch/handle events but do not wait)	306	EV::LOOP_NOWAIT do not block at all (fetch/handle events but do not wait)
127		307
128	=item EV::unloop [$how]	308	=item EV::break [$how]
129		309
		310	=item $loop->break ([$how])
		311
130	When called with no arguments or an argument of EV::UNLOOP_ONE, makes the	312	When called with no arguments or an argument of EV::BREAK_ONE, makes the
131	innermost call to EV::loop return.	313	innermost call to EV::loop return.
132		314
133	When called with an argument of EV::UNLOOP_ALL, all calls to EV::loop will return as	315	When called with an argument of EV::BREAK_ALL, all calls to EV::loop will
134	fast as possible.	316	return as fast as possible.
		317
		318	When called with an argument of EV::BREAK_CANCEL, any pending break will
		319	be cancelled.
		320
		321	=item $count = EV::loop_count
		322
		323	=item $count = $loop->loop_count
		324
		325	Return the number of times the event loop has polled for new
		326	events. Sometimes useful as a generation counter.
135		327
136	=item EV::once $fh_or_undef, $events, $timeout, $cb->($revents)	328	=item EV::once $fh_or_undef, $events, $timeout, $cb->($revents)
		329
		330	=item $loop->once ($fh_or_undef, $events, $timeout, $cb->($revents))
137		331
138	This function rolls together an I/O and a timer watcher for a single	332	This function rolls together an I/O and a timer watcher for a single
139	one-shot event without the need for managing a watcher object.	333	one-shot event without the need for managing a watcher object.
140		334
141	If C<$fh_or_undef> is a filehandle or file descriptor, then C<$events>	335	If C<$fh_or_undef> is a filehandle or file descriptor, then C<$events>
…		…
147	If timeout is C<undef> or negative, then there will be no	341	If timeout is C<undef> or negative, then there will be no
148	timeout. Otherwise a EV::timer with this value will be started.	342	timeout. Otherwise a EV::timer with this value will be started.
149		343
150	When an error occurs or either the timeout or I/O watcher triggers, then	344	When an error occurs or either the timeout or I/O watcher triggers, then
151	the callback will be called with the received event set (in general	345	the callback will be called with the received event set (in general
152	you can expect it to be a combination of C<EV:ERROR>, C<EV::READ>,	346	you can expect it to be a combination of C<EV::ERROR>, C<EV::READ>,
153	C<EV::WRITE> and C<EV::TIMEOUT>).	347	C<EV::WRITE> and C<EV::TIMER>).
154		348
155	EV::once doesn't return anything: the watchers stay active till either	349	EV::once doesn't return anything: the watchers stay active till either
156	of them triggers, then they will be stopped and freed, and the callback	350	of them triggers, then they will be stopped and freed, and the callback
157	invoked.	351	invoked.
158		352
159	=back	353	=item EV::feed_fd_event $fd, $revents
160		354
		355	=item $loop->feed_fd_event ($fd, $revents)
		356
		357	Feed an event on a file descriptor into EV. EV will react to this call as
		358	if the readyness notifications specified by C<$revents> (a combination of
		359	C<EV::READ> and C<EV::WRITE>) happened on the file descriptor C<$fd>.
		360
		361	=item EV::feed_signal_event $signal
		362
		363	Feed a signal event into the default loop. EV will react to this call as
		364	if the signal specified by C<$signal> had occured.
		365
		366	=item EV::feed_signal $signal
		367
		368	Feed a signal event into EV - unlike C<EV::feed_signal_event>, this works
		369	regardless of which loop has registered the signal, and is mainly useful
		370	fro custom signal implementations.
		371
		372	=item EV::set_io_collect_interval $time
		373
		374	=item $loop->set_io_collect_interval ($time)
		375
		376	=item EV::set_timeout_collect_interval $time
		377
		378	=item $loop->set_timeout_collect_interval ($time)
		379
		380	These advanced functions set the minimum block interval when polling for I/O events and the minimum
		381	wait interval for timer events. See the libev documentation at
		382	L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#FUNCTIONS_CONTROLLING_THE_EVENT_LOOP>
		383	(locally installed as F<EV::libev>) for a more detailed discussion.
		384
		385	=item $count = EV::pending_count
		386
		387	=item $count = $loop->pending_count
		388
		389	Returns the number of currently pending watchers.
		390
		391	=item EV::invoke_pending
		392
		393	=item $loop->invoke_pending
		394
		395	Invoke all currently pending watchers.
		396
		397	=back
		398
		399
161	=head2 WATCHER OBJECTS	400	=head1 WATCHER OBJECTS
162		401
163	A watcher is an object that gets created to record your interest in some	402	A watcher is an object that gets created to record your interest in some
164	event. For instance, if you want to wait for STDIN to become readable, you	403	event. For instance, if you want to wait for STDIN to become readable, you
165	would create an EV::io watcher for that:	404	would create an EV::io watcher for that:
166		405
167	my $watcher = EV::io *STDIN, EV::READ, sub {	406	my $watcher = EV::io *STDIN, EV::READ, sub {
168	my ($watcher, $revents) = @_;	407	my ($watcher, $revents) = @_;
169	warn "yeah, STDIN should not be readable without blocking!\n"	408	warn "yeah, STDIN should now be readable without blocking!\n"
170	};	409	};
171		410
172	All watchers can be active (waiting for events) or inactive (paused). Only	411	All watchers can be active (waiting for events) or inactive (paused). Only
173	active watchers will have their callbacks invoked. All callbacks will be	412	active watchers will have their callbacks invoked. All callbacks will be
174	called with at least two arguments: the watcher and a bitmask of received	413	called with at least two arguments: the watcher and a bitmask of received
175	events.	414	events.
176		415
177	Each watcher type has its associated bit in revents, so you can use the	416	Each watcher type has its associated bit in revents, so you can use the
178	same callback for multiple watchers. The event mask is named after the	417	same callback for multiple watchers. The event mask is named after the
179	type, i..e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,	418	type, i.e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,
180	EV::periodic sets EV::PERIODIC and so on, with the exception of IO events	419	EV::periodic sets EV::PERIODIC and so on, with the exception of I/O events
181	(which can set both EV::READ and EV::WRITE bits), and EV::timer (which	420	(which can set both EV::READ and EV::WRITE bits).
182	uses EV::TIMEOUT).
183		421
184	In the rare case where one wants to create a watcher but not start it at	422	In the rare case where one wants to create a watcher but not start it at
185	the same time, each constructor has a variant with a trailing C<_ns> in	423	the same time, each constructor has a variant with a trailing C<_ns> in
186	its name, e.g. EV::io has a non-starting variant EV::io_ns and so on.	424	its name, e.g. EV::io has a non-starting variant EV::io_ns and so on.
187		425
…		…
207		445
208	=item $w->stop	446	=item $w->stop
209		447
210	Stop a watcher if it is active. Also clear any pending events (events that	448	Stop a watcher if it is active. Also clear any pending events (events that
211	have been received but that didn't yet result in a callback invocation),	449	have been received but that didn't yet result in a callback invocation),
212	regardless of wether the watcher was active or not.	450	regardless of whether the watcher was active or not.
213		451
214	=item $bool = $w->is_active	452	=item $bool = $w->is_active
215		453
216	Returns true if the watcher is active, false otherwise.	454	Returns true if the watcher is active, false otherwise.
217		455
…		…
247	The default priority of any newly-created watcher is 0.	485	The default priority of any newly-created watcher is 0.
248		486
249	Note that the priority semantics have not yet been fleshed out and are	487	Note that the priority semantics have not yet been fleshed out and are
250	subject to almost certain change.	488	subject to almost certain change.
251		489
252	=item $w->trigger ($revents)	490	=item $w->invoke ($revents)
253		491
254	Call the callback now with the given event mask.	492	Call the callback now with the given event mask.
		493
		494	=item $w->feed_event ($revents)
		495
		496	Feed some events on this watcher into EV. EV will react to this call as if
		497	the watcher had received the given C<$revents> mask.
		498
		499	=item $revents = $w->clear_pending
		500
		501	If the watcher is pending, this function clears its pending status and
		502	returns its C<$revents> bitset (as if its callback was invoked). If the
		503	watcher isn't pending it does nothing and returns C<0>.
255		504
256	=item $previous_state = $w->keepalive ($bool)	505	=item $previous_state = $w->keepalive ($bool)
257		506
258	Normally, C<EV::loop> will return when there are no active watchers	507	Normally, C<EV::loop> will return when there are no active watchers
259	(which is a "deadlock" because no progress can be made anymore). This is	508	(which is a "deadlock" because no progress can be made anymore). This is
260	convinient because it allows you to start your watchers (and your jobs),	509	convenient because it allows you to start your watchers (and your jobs),
261	call C<EV::loop> once and when it returns you know that all your jobs are	510	call C<EV::loop> once and when it returns you know that all your jobs are
262	finished (or they forgot to register some watchers for their task :).	511	finished (or they forgot to register some watchers for their task :).
263		512
264	Sometimes, however, this gets in your way, for example when you the module	513	Sometimes, however, this gets in your way, for example when the module
265	that calls C<EV::loop> (usually the main program) is not the same module	514	that calls C<EV::loop> (usually the main program) is not the same module
266	as a long-living watcher (for example a DNS client module written by	515	as a long-living watcher (for example a DNS client module written by
267	somebody else even). Then you might want any outstanding requests to be	516	somebody else even). Then you might want any outstanding requests to be
268	handled, but you would not want to keep C<EV::loop> from returning just	517	handled, but you would not want to keep C<EV::loop> from returning just
269	because you happen to have this long-running UDP port watcher.	518	because you happen to have this long-running UDP port watcher.
270		519
271	In this case you can clear the keepalive status, which means that even	520	In this case you can clear the keepalive status, which means that even
272	though your watcher is active, it won't keep C<EV::loop> from returning.	521	though your watcher is active, it won't keep C<EV::loop> from returning.
273		522
274	The initial value for keepalive is true (enabled), and you cna change it	523	The initial value for keepalive is true (enabled), and you can change it
275	any time.	524	any time.
276		525
277	Example: Register an IO watcher for some UDP socket but do not keep the	526	Example: Register an I/O watcher for some UDP socket but do not keep the
278	event loop from running just because of that watcher.	527	event loop from running just because of that watcher.
279		528
280	my $udp_socket = ...	529	my $udp_socket = ...
281	my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... };	530	my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... };
282	$udp_watcher->keepalive (0);	531	$udp_watcher->keepalive (0);
283		532
284	=back	533	=item $loop = $w->loop
285		534
		535	Return the loop that this watcher is attached to.
286		536
		537	=back
		538
		539
287	=head2 WATCHER TYPES	540	=head1 WATCHER TYPES
288		541
289	Each of the following subsections describes a single watcher type.	542	Each of the following subsections describes a single watcher type.
290		543
291	=head3 IO WATCHERS - is this file descriptor readable or writable?	544	=head3 I/O WATCHERS - is this file descriptor readable or writable?
292		545
293	=over 4	546	=over 4
294		547
295	=item $w = EV::io $fileno_or_fh, $eventmask, $callback	548	=item $w = EV::io $fileno_or_fh, $eventmask, $callback
296		549
297	=item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback	550	=item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback
		551
		552	=item $w = $loop->io ($fileno_or_fh, $eventmask, $callback)
		553
		554	=item $w = $loop->io_ns ($fileno_or_fh, $eventmask, $callback)
298		555
299	As long as the returned watcher object is alive, call the C<$callback>	556	As long as the returned watcher object is alive, call the C<$callback>
300	when at least one of events specified in C<$eventmask> occurs.	557	when at least one of events specified in C<$eventmask> occurs.
301		558
302	The $eventmask can be one or more of these constants ORed together:	559	The $eventmask can be one or more of these constants ORed together:
…		…
331	=over 4	588	=over 4
332		589
333	=item $w = EV::timer $after, $repeat, $callback	590	=item $w = EV::timer $after, $repeat, $callback
334		591
335	=item $w = EV::timer_ns $after, $repeat, $callback	592	=item $w = EV::timer_ns $after, $repeat, $callback
		593
		594	=item $w = $loop->timer ($after, $repeat, $callback)
		595
		596	=item $w = $loop->timer_ns ($after, $repeat, $callback)
336		597
337	Calls the callback after C<$after> seconds (which may be fractional). If	598	Calls the callback after C<$after> seconds (which may be fractional). If
338	C<$repeat> is non-zero, the timer will be restarted (with the $repeat	599	C<$repeat> is non-zero, the timer will be restarted (with the $repeat
339	value as $after) after the callback returns.	600	value as $after) after the callback returns.
340		601
…		…
381	=over 4	642	=over 4
382		643
383	=item $w = EV::periodic $at, $interval, $reschedule_cb, $callback	644	=item $w = EV::periodic $at, $interval, $reschedule_cb, $callback
384		645
385	=item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback	646	=item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback
		647
		648	=item $w = $loop->periodic ($at, $interval, $reschedule_cb, $callback)
		649
		650	=item $w = $loop->periodic_ns ($at, $interval, $reschedule_cb, $callback)
386		651
387	Similar to EV::timer, but is not based on relative timeouts but on	652	Similar to EV::timer, but is not based on relative timeouts but on
388	absolute times. Apart from creating "simple" timers that trigger "at" the	653	absolute times. Apart from creating "simple" timers that trigger "at" the
389	specified time, it can also be used for non-drifting absolute timers and	654	specified time, it can also be used for non-drifting absolute timers and
390	more complex, cron-like, setups that are not adversely affected by time	655	more complex, cron-like, setups that are not adversely affected by time
…		…
400	This time simply fires at the wallclock time C<$at> and doesn't repeat. It	665	This time simply fires at the wallclock time C<$at> and doesn't repeat. It
401	will not adjust when a time jump occurs, that is, if it is to be run	666	will not adjust when a time jump occurs, that is, if it is to be run
402	at January 1st 2011 then it will run when the system time reaches or	667	at January 1st 2011 then it will run when the system time reaches or
403	surpasses this time.	668	surpasses this time.
404		669
405	=item * non-repeating interval timer ($interval > 0, $reschedule_cb = 0)	670	=item * repeating interval timer ($interval > 0, $reschedule_cb = 0)
406		671
407	In this mode the watcher will always be scheduled to time out at the	672	In this mode the watcher will always be scheduled to time out at the
408	next C<$at + N * $interval> time (for some integer N) and then repeat,	673	next C<$at + N * $interval> time (for some integer N) and then repeat,
409	regardless of any time jumps.	674	regardless of any time jumps.
410		675
…		…
428	time the periodic watcher gets scheduled, the reschedule callback	693	time the periodic watcher gets scheduled, the reschedule callback
429	($reschedule_cb) will be called with the watcher as first, and the current	694	($reschedule_cb) will be called with the watcher as first, and the current
430	time as second argument.	695	time as second argument.
431		696
432	I<This callback MUST NOT stop or destroy this or any other periodic	697	I<This callback MUST NOT stop or destroy this or any other periodic
433	watcher, ever>. If you need to stop it, return 1e30 and stop it	698	watcher, ever, and MUST NOT call any event loop functions or methods>. If
434	afterwards.	699	you need to stop it, return 1e30 and stop it afterwards. You may create
		700	and start a C<EV::prepare> watcher for this task.
435		701
436	It must return the next time to trigger, based on the passed time value	702	It must return the next time to trigger, based on the passed time value
437	(that is, the lowest time value larger than to the second argument). It	703	(that is, the lowest time value larger than or equal to to the second
438	will usually be called just before the callback will be triggered, but	704	argument). It will usually be called just before the callback will be
439	might be called at other times, too.	705	triggered, but might be called at other times, too.
440		706
441	This can be used to create very complex timers, such as a timer that	707	This can be used to create very complex timers, such as a timer that
442	triggers on each midnight, local time (actually 24 hours after the last	708	triggers on each midnight, local time (actually 24 hours after the last
443	midnight, to keep the example simple. If you know a way to do it correctly	709	midnight, to keep the example simple. If you know a way to do it correctly
444	in about the same space (without requiring elaborate modules), drop me a	710	in about the same space (without requiring elaborate modules), drop me a
…		…
465		731
466	=item $w->again	732	=item $w->again
467		733
468	Simply stops and starts the watcher again.	734	Simply stops and starts the watcher again.
469		735
		736	=item $time = $w->at
		737
		738	Return the time that the watcher is expected to trigger next.
		739
470	=back	740	=back
471		741
472		742
473	=head3 SIGNAL WATCHERS - signal me when a signal gets signalled!	743	=head3 SIGNAL WATCHERS - signal me when a signal gets signalled!
474		744
475	=over 4	745	=over 4
476		746
477	=item $w = EV::signal $signal, $callback	747	=item $w = EV::signal $signal, $callback
478		748
479	=item $w = EV::signal_ns $signal, $callback	749	=item $w = EV::signal_ns $signal, $callback
		750
		751	=item $w = $loop->signal ($signal, $callback)
		752
		753	=item $w = $loop->signal_ns ($signal, $callback)
480		754
481	Call the callback when $signal is received (the signal can be specified by	755	Call the callback when $signal is received (the signal can be specified by
482	number or by name, just as with C<kill> or C<%SIG>).	756	number or by name, just as with C<kill> or C<%SIG>).
		757
		758	Only one event loop can grab a given signal - attempting to grab the same
		759	signal from two EV loops will crash the program immediately or cause data
		760	corruption.
483		761
484	EV will grab the signal for the process (the kernel only allows one	762	EV will grab the signal for the process (the kernel only allows one
485	component to receive a signal at a time) when you start a signal watcher,	763	component to receive a signal at a time) when you start a signal watcher,
486	and removes it again when you stop it. Perl does the same when you	764	and removes it again when you stop it. Perl does the same when you
487	add/remove callbacks to C<%SIG>, so watch out.	765	add/remove callbacks to C<%SIG>, so watch out.
…		…
507		785
508	=head3 CHILD WATCHERS - watch out for process status changes	786	=head3 CHILD WATCHERS - watch out for process status changes
509		787
510	=over 4	788	=over 4
511		789
512	=item $w = EV::child $pid, $callback	790	=item $w = EV::child $pid, $trace, $callback
513		791
514	=item $w = EV::child_ns $pid, $callback	792	=item $w = EV::child_ns $pid, $trace, $callback
515		793
		794	=item $w = $loop->child ($pid, $trace, $callback)
		795
		796	=item $w = $loop->child_ns ($pid, $trace, $callback)
		797
516	Call the callback when a status change for pid C<$pid> (or any pid if	798	Call the callback when a status change for pid C<$pid> (or any pid
517	C<$pid> is 0) has been received. More precisely: when the process receives	799	if C<$pid> is 0) has been received (a status change happens when the
		800	process terminates or is killed, or, when trace is true, additionally when
		801	it is stopped or continued). More precisely: when the process receives
518	a C<SIGCHLD>, EV will fetch the outstanding exit/wait status for all	802	a C<SIGCHLD>, EV will fetch the outstanding exit/wait status for all
519	changed/zombie children and call the callback.	803	changed/zombie children and call the callback.
520		804
521	It is valid (and fully supported) to install a child watcher after a child	805	It is valid (and fully supported) to install a child watcher after a child
522	has exited but before the event loop has started its next iteration (for	806	has exited but before the event loop has started its next iteration (for
…		…
529	You can have as many pid watchers per pid as you want, they will all be	813	You can have as many pid watchers per pid as you want, they will all be
530	called.	814	called.
531		815
532	The C<child_ns> variant doesn't start (activate) the newly created watcher.	816	The C<child_ns> variant doesn't start (activate) the newly created watcher.
533		817
534	=item $w->set ($pid)	818	=item $w->set ($pid, $trace)
535		819
536	Reconfigures the watcher, see the constructor above for details. Can be called at	820	Reconfigures the watcher, see the constructor above for details. Can be called at
537	any time.	821	any time.
538		822
539	=item $current_pid = $w->pid	823	=item $current_pid = $w->pid
540		824
541	=item $old_pid = $w->pid ($new_pid)
542
543	Returns the previously set process id and optionally set a new one.	825	Returns the previously set process id and optionally set a new one.
544		826
545	=item $exit_status = $w->rstatus	827	=item $exit_status = $w->rstatus
546		828
547	Return the exit/wait status (as returned by waitpid, see the waitpid entry	829	Return the exit/wait status (as returned by waitpid, see the waitpid entry
…		…
560	=over 4	842	=over 4
561		843
562	=item $w = EV::stat $path, $interval, $callback	844	=item $w = EV::stat $path, $interval, $callback
563		845
564	=item $w = EV::stat_ns $path, $interval, $callback	846	=item $w = EV::stat_ns $path, $interval, $callback
		847
		848	=item $w = $loop->stat ($path, $interval, $callback)
		849
		850	=item $w = $loop->stat_ns ($path, $interval, $callback)
565		851
566	Call the callback when a file status change has been detected on	852	Call the callback when a file status change has been detected on
567	C<$path>. The C<$path> does not need to exist, changing from "path exists"	853	C<$path>. The C<$path> does not need to exist, changing from "path exists"
568	to "path does not exist" is a status change like any other.	854	to "path does not exist" is a status change like any other.
569		855
…		…
576	as even with OS-supported change notifications, this can be	862	as even with OS-supported change notifications, this can be
577	resource-intensive.	863	resource-intensive.
578		864
579	The C<stat_ns> variant doesn't start (activate) the newly created watcher.	865	The C<stat_ns> variant doesn't start (activate) the newly created watcher.
580		866
		867	=item ... = $w->stat
		868
		869	This call is very similar to the perl C<stat> built-in: It stats (using
		870	C<lstat>) the path specified in the watcher and sets perls stat cache (as
		871	well as EV's idea of the current stat values) to the values found.
		872
		873	In scalar context, a boolean is return indicating success or failure of
		874	the stat. In list context, the same 13-value list as with stat is returned
		875	(except that the blksize and blocks fields are not reliable).
		876
		877	In the case of an error, errno is set to C<ENOENT> (regardless of the
		878	actual error value) and the C<nlink> value is forced to zero (if the stat
		879	was successful then nlink is guaranteed to be non-zero).
		880
		881	See also the next two entries for more info.
		882
		883	=item ... = $w->attr
		884
		885	Just like C<< $w->stat >>, but without the initial stat'ing: this returns
		886	the values most recently detected by EV. See the next entry for more info.
		887
		888	=item ... = $w->prev
		889
		890	Just like C<< $w->stat >>, but without the initial stat'ing: this returns
		891	the previous set of values, before the change.
		892
		893	That is, when the watcher callback is invoked, C<< $w->prev >> will be set
		894	to the values found I<before> a change was detected, while C<< $w->attr >>
		895	returns the values found leading to the change detection. The difference (if any)
		896	between C<prev> and C<attr> is what triggered the callback.
		897
		898	If you did something to the filesystem object and do not want to trigger
		899	yet another change, you can call C<stat> to update EV's idea of what the
		900	current attributes are.
		901
581	=item $w->set ($path, $interval)	902	=item $w->set ($path, $interval)
582		903
583	Reconfigures the watcher, see the constructor above for details. Can be	904	Reconfigures the watcher, see the constructor above for details. Can be
584	called at any time.	905	called at any time.
585		906
…		…
605		926
606	=item $w = EV::idle $callback	927	=item $w = EV::idle $callback
607		928
608	=item $w = EV::idle_ns $callback	929	=item $w = EV::idle_ns $callback
609		930
610	Call the callback when there are no pending io, timer/periodic, signal or	931	=item $w = $loop->idle ($callback)
611	child events, i.e. when the process is idle.	932
		933	=item $w = $loop->idle_ns ($callback)
		934
		935	Call the callback when there are no other pending watchers of the same or
		936	higher priority (excluding check, prepare and other idle watchers of the
		937	same or lower priority, of course). They are called idle watchers because
		938	when the watcher is the highest priority pending event in the process, the
		939	process is considered to be idle at that priority.
		940
		941	If you want a watcher that is only ever called when I<no> other events are
		942	outstanding you have to set the priority to C<EV::MINPRI>.
612		943
613	The process will not block as long as any idle watchers are active, and	944	The process will not block as long as any idle watchers are active, and
614	they will be called repeatedly until stopped.	945	they will be called repeatedly until stopped.
615		946
		947	For example, if you have idle watchers at priority C<0> and C<1>, and
		948	an I/O watcher at priority C<0>, then the idle watcher at priority C<1>
		949	and the I/O watcher will always run when ready. Only when the idle watcher
		950	at priority C<1> is stopped and the I/O watcher at priority C<0> is not
		951	pending with the C<0>-priority idle watcher be invoked.
		952
616	The C<idle_ns> variant doesn't start (activate) the newly created watcher.	953	The C<idle_ns> variant doesn't start (activate) the newly created watcher.
617		954
618	=back	955	=back
619		956
620		957
…		…
623	=over 4	960	=over 4
624		961
625	=item $w = EV::prepare $callback	962	=item $w = EV::prepare $callback
626		963
627	=item $w = EV::prepare_ns $callback	964	=item $w = EV::prepare_ns $callback
		965
		966	=item $w = $loop->prepare ($callback)
		967
		968	=item $w = $loop->prepare_ns ($callback)
628		969
629	Call the callback just before the process would block. You can still	970	Call the callback just before the process would block. You can still
630	create/modify any watchers at this point.	971	create/modify any watchers at this point.
631		972
632	See the EV::check watcher, below, for explanations and an example.	973	See the EV::check watcher, below, for explanations and an example.
…		…
642		983
643	=item $w = EV::check $callback	984	=item $w = EV::check $callback
644		985
645	=item $w = EV::check_ns $callback	986	=item $w = EV::check_ns $callback
646		987
		988	=item $w = $loop->check ($callback)
		989
		990	=item $w = $loop->check_ns ($callback)
		991
647	Call the callback just after the process wakes up again (after it has	992	Call the callback just after the process wakes up again (after it has
648	gathered events), but before any other callbacks have been invoked.	993	gathered events), but before any other callbacks have been invoked.
649		994
650	This is used to integrate other event-based software into the EV	995	This can be used to integrate other event-based software into the EV
651	mainloop: You register a prepare callback and in there, you create io and	996	mainloop: You register a prepare callback and in there, you create io and
652	timer watchers as required by the other software. Here is a real-world	997	timer watchers as required by the other software. Here is a real-world
653	example of integrating Net::SNMP (with some details left out):	998	example of integrating Net::SNMP (with some details left out):
654		999
655	our @snmp_watcher;	1000	our @snmp_watcher;
…		…
660	or return;	1005	or return;
661		1006
662	# make the dispatcher handle any outstanding stuff	1007	# make the dispatcher handle any outstanding stuff
663	... not shown	1008	... not shown
664		1009
665	# create an IO watcher for each and every socket	1010	# create an I/O watcher for each and every socket
666	@snmp_watcher = (	1011	@snmp_watcher = (
667	(map { EV::io $_, EV::READ, sub { } }	1012	(map { EV::io $_, EV::READ, sub { } }
668	keys %{ $dispatcher->{_descriptors} }),	1013	keys %{ $dispatcher->{_descriptors} }),
669		1014
670	EV::timer +($event->[Net::SNMP::Dispatcher::_ACTIVE]	1015	EV::timer +($event->[Net::SNMP::Dispatcher::_ACTIVE]
…		…
685	# make the dispatcher handle any new stuff	1030	# make the dispatcher handle any new stuff
686	... not shown	1031	... not shown
687	};	1032	};
688		1033
689	The callbacks of the created watchers will not be called as the watchers	1034	The callbacks of the created watchers will not be called as the watchers
690	are destroyed before this cna happen (remember EV::check gets called	1035	are destroyed before this can happen (remember EV::check gets called
691	first).	1036	first).
692		1037
693	The C<check_ns> variant doesn't start (activate) the newly created watcher.	1038	The C<check_ns> variant doesn't start (activate) the newly created watcher.
		1039
		1040	=item EV::CHECK constant issues
		1041
		1042	Like all other watcher types, there is a bitmask constant for use in
		1043	C<$revents> and other places. The C<EV::CHECK> is special as it has
		1044	the same name as the C<CHECK> sub called by Perl. This doesn't cause
		1045	big issues on newer perls (beginning with 5.8.9), but it means thatthe
		1046	constant must be I<inlined>, i.e. runtime calls will not work. That means
		1047	that as long as you always C<use EV> and then C<EV::CHECK> you are on the
		1048	safe side.
694		1049
695	=back	1050	=back
696		1051
697		1052
698	=head3 FORK WATCHERS - the audacity to resume the event loop after a fork	1053	=head3 FORK WATCHERS - the audacity to resume the event loop after a fork
…		…
705		1060
706	=item $w = EV::fork $callback	1061	=item $w = EV::fork $callback
707		1062
708	=item $w = EV::fork_ns $callback	1063	=item $w = EV::fork_ns $callback
709		1064
		1065	=item $w = $loop->fork ($callback)
		1066
		1067	=item $w = $loop->fork_ns ($callback)
		1068
710	Call the callback before the event loop is resumed in the child process	1069	Call the callback before the event loop is resumed in the child process
711	after a fork.	1070	after a fork.
712		1071
713	The C<fork_ns> variant doesn't start (activate) the newly created watcher.	1072	The C<fork_ns> variant doesn't start (activate) the newly created watcher.
714		1073
715	=back	1074	=back
716		1075
717		1076
		1077	=head3 EMBED WATCHERS - when one backend isn't enough...
		1078
		1079	This is a rather advanced watcher type that lets you embed one event loop
		1080	into another (currently only IO events are supported in the embedded
		1081	loop, other types of watchers might be handled in a delayed or incorrect
		1082	fashion and must not be used).
		1083
		1084	See the libev documentation at
		1085	L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#code_ev_embed_code_when_one_backend_>
		1086	(locally installed as F<EV::libev>) for more details.
		1087
		1088	In short, this watcher is most useful on BSD systems without working
		1089	kqueue to still be able to handle a large number of sockets:
		1090
		1091	my $socket_loop;
		1092
		1093	# check wether we use SELECT or POLL _and_ KQUEUE is supported
		1094	if (
		1095	(EV::backend & (EV::BACKEND_POLL \| EV::BACKEND_SELECT))
		1096	&& (EV::supported_backends & EV::embeddable_backends & EV::BACKEND_KQUEUE)
		1097	) {
		1098	# use kqueue for sockets
		1099	$socket_loop = new EV::Loop EV::BACKEND_KQUEUE \| EV::FLAG_NOENV;
		1100	}
		1101
		1102	# use the default loop otherwise
		1103	$socket_loop \|\|= EV::default_loop;
		1104
		1105	=over 4
		1106
		1107	=item $w = EV::embed $otherloop[, $callback]
		1108
		1109	=item $w = EV::embed_ns $otherloop[, $callback]
		1110
		1111	=item $w = $loop->embed ($otherloop[, $callback])
		1112
		1113	=item $w = $loop->embed_ns ($otherloop[, $callback])
		1114
		1115	Call the callback when the embedded event loop (C<$otherloop>) has any
		1116	I/O activity. The C<$callback> is optional: if it is missing, then the
		1117	embedded event loop will be managed automatically (which is recommended),
		1118	otherwise you have to invoke C<sweep> yourself.
		1119
		1120	The C<embed_ns> variant doesn't start (activate) the newly created watcher.
		1121
		1122	=back
		1123
		1124	=head3 ASYNC WATCHERS - how to wake up another event loop
		1125
		1126	Async watchers are provided by EV, but have little use in perl directly,
		1127	as perl neither supports threads running in parallel nor direct access to
		1128	signal handlers or other contexts where they could be of value.
		1129
		1130	It is, however, possible to use them from the XS level.
		1131
		1132	Please see the libev documentation for further details.
		1133
		1134	=over 4
		1135
		1136	=item $w = EV::async $callback
		1137
		1138	=item $w = EV::async_ns $callback
		1139
		1140	=item $w->send
		1141
		1142	=item $bool = $w->async_pending
		1143
		1144	=back
		1145
		1146
		1147	=head1 PERL SIGNALS
		1148
		1149	While Perl signal handling (C<%SIG>) is not affected by EV, the behaviour
		1150	with EV is as the same as any other C library: Perl-signals will only be
		1151	handled when Perl runs, which means your signal handler might be invoked
		1152	only the next time an event callback is invoked.
		1153
		1154	The solution is to use EV signal watchers (see C<EV::signal>), which will
		1155	ensure proper operations with regards to other event watchers.
		1156
		1157	If you cannot do this for whatever reason, you can also force a watcher
		1158	to be called on every event loop iteration by installing a C<EV::check>
		1159	watcher:
		1160
		1161	my $async_check = EV::check sub { };
		1162
		1163	This ensures that perl gets into control for a short time to handle any
		1164	pending signals, and also ensures (slightly) slower overall operation.
		1165
718	=head1 THREADS	1166	=head1 ITHREADS
719		1167
720	Threads are not supported by this module in any way. Perl pseudo-threads	1168	Ithreads are not supported by this module in any way. Perl pseudo-threads
721	is evil stuff and must die. As soon as Perl gains real threads I will work	1169	is evil stuff and must die. Real threads as provided by Coro are fully
722	on thread support for it.	1170	supported (and enhanced support is available via L<Coro::EV>).
723		1171
724	=head1 FORK	1172	=head1 FORK
725		1173
726	Most of the "improved" event delivering mechanisms of modern operating	1174	Most of the "improved" event delivering mechanisms of modern operating
727	systems have quite a few problems with fork(2) (to put it bluntly: it is	1175	systems have quite a few problems with fork(2) (to put it bluntly: it is
…		…
743	our $DIED = sub {	1191	our $DIED = sub {
744	warn "EV: error in callback (ignoring): $@";	1192	warn "EV: error in callback (ignoring): $@";
745	};	1193	};
746		1194
747	default_loop	1195	default_loop
748	or die 'EV: cannot initialise libev backend. bad $ENV{LIBEV_METHODS}?';	1196	or die 'EV: cannot initialise libev backend. bad $ENV{LIBEV_FLAGS}?';
749		1197
750	1;	1198	1;
751		1199
752	=head1 SEE ALSO	1200	=head1 SEE ALSO
753		1201
754	L<EV::DNS>.	1202	L<EV::MakeMaker> - MakeMaker interface to XS API, L<EV::ADNS>
		1203	(asynchronous DNS), L<Glib::EV> (makes Glib/Gtk2 use EV as event
		1204	loop), L<EV::Glib> (embed Glib into EV), L<Coro::EV> (efficient thread
		1205	integration), L<Net::SNMP::EV> (asynchronous SNMP), L<AnyEvent> for
		1206	event-loop agnostic and portable event driven programming.
755		1207
756	=head1 AUTHOR	1208	=head1 AUTHOR
757		1209
758	Marc Lehmann <schmorp@schmorp.de>	1210	Marc Lehmann <schmorp@schmorp.de>
759	http://home.schmorp.de/	1211	http://home.schmorp.de/
760		1212
761	=cut	1213	=cut
762		1214

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Comparing EV/EV.pm (file contents): Revision 1.56 by root, Tue Nov 27 10:59:10 2007 UTC vs. Revision 1.134 by root, Tue Jan 11 13:45:28 2011 UTC

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Comparing EV/EV.pm (file contents):
Revision 1.56 by root, Tue Nov 27 10:59:10 2007 UTC vs.
Revision 1.134 by root, Tue Jan 11 13:45:28 2011 UTC