[ViewVC] Diff of: cvs/cvsroot/Coro/Coro.pm

Comparing cvsroot/Coro/Coro.pm (file contents):
Revision 1.100 by root, Tue Dec 12 13:56:45 2006 UTC vs.
Revision 1.178 by root, Thu Apr 17 22:33:10 2008 UTC

…		…
6		6
7	use Coro;	7	use Coro;
8		8
9	async {	9	async {
10	# some asynchronous thread of execution	10	# some asynchronous thread of execution
		11	print "2\n";
		12	cede; # yield back to main
		13	print "4\n";
11	};	14	};
		15	print "1\n";
		16	cede; # yield to coroutine
		17	print "3\n";
		18	cede; # and again
12		19
13	# alternatively create an async coroutine like this:	20	# use locking
		21	my $lock = new Coro::Semaphore;
		22	my $locked;
14		23
15	sub some_func : Coro {	24	$lock->down;
16	# some more async code	25	$locked = 1;
17	}	26	$lock->up;
18
19	cede;
20		27
21	=head1 DESCRIPTION	28	=head1 DESCRIPTION
22		29
23	This module collection manages coroutines. Coroutines are similar	30	This module collection manages coroutines. Coroutines are similar
24	to threads but don't run in parallel at the same time even on SMP	31	to threads but don't run in parallel at the same time even on SMP
25	machines. The specific flavor of coroutine use din this module also	32	machines. The specific flavor of coroutine used in this module also
26	guarentees you that it will not switch between coroutines unless	33	guarantees you that it will not switch between coroutines unless
27	necessary, at easily-identified points in your program, so locking and	34	necessary, at easily-identified points in your program, so locking and
28	parallel access are rarely an issue, making coroutine programming much	35	parallel access are rarely an issue, making coroutine programming much
29	safer than threads programming.	36	safer than threads programming.
30		37
31	(Perl, however, does not natively support real threads but instead does a	38	(Perl, however, does not natively support real threads but instead does a
…		…
33	is a performance win on Windows machines, and a loss everywhere else).	40	is a performance win on Windows machines, and a loss everywhere else).
34		41
35	In this module, coroutines are defined as "callchain + lexical variables +	42	In this module, coroutines are defined as "callchain + lexical variables +
36	@_ + $_ + $@ + $/ + C stack), that is, a coroutine has its own callchain,	43	@_ + $_ + $@ + $/ + C stack), that is, a coroutine has its own callchain,
37	its own set of lexicals and its own set of perls most important global	44	its own set of lexicals and its own set of perls most important global
38	variables.	45	variables (see L<Coro::State> for more configuration).
39		46
40	=cut	47	=cut
41		48
42	package Coro;	49	package Coro;
43		50
…		…
50		57
51	our $idle; # idle handler	58	our $idle; # idle handler
52	our $main; # main coroutine	59	our $main; # main coroutine
53	our $current; # current coroutine	60	our $current; # current coroutine
54		61
55	our $VERSION = '3.2';	62	our $VERSION = '4.51';
56		63
57	our @EXPORT = qw(async cede schedule terminate current unblock_sub);	64	our @EXPORT = qw(async async_pool cede schedule terminate current unblock_sub);
58	our %EXPORT_TAGS = (	65	our %EXPORT_TAGS = (
59	prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)],	66	prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)],
60	);	67	);
61	our @EXPORT_OK = (@{$EXPORT_TAGS{prio}}, qw(nready));	68	our @EXPORT_OK = (@{$EXPORT_TAGS{prio}}, qw(nready));
62		69
…		…
108		115
109	The current coroutine (the last coroutine switched to). The initial value	116	The current coroutine (the last coroutine switched to). The initial value
110	is C<$main> (of course).	117	is C<$main> (of course).
111		118
112	This variable is B<strictly> I<read-only>. It is provided for performance	119	This variable is B<strictly> I<read-only>. It is provided for performance
113	reasons. If performance is not essentiel you are encouraged to use the	120	reasons. If performance is not essential you are encouraged to use the
114	C<Coro::current> function instead.	121	C<Coro::current> function instead.
115		122
116	=cut	123	=cut
117		124
		125	$main->{desc} = "[main::]";
		126
118	# maybe some other module used Coro::Specific before...	127	# maybe some other module used Coro::Specific before...
119	$main->{specific} = $current->{specific}	128	$main->{_specific} = $current->{_specific}
120	if $current;	129	if $current;
121		130
122	_set_current $main;	131	_set_current $main;
123		132
124	sub current() { $current }	133	sub current() { $current }
…		…
132	This hook is overwritten by modules such as C<Coro::Timer> and	141	This hook is overwritten by modules such as C<Coro::Timer> and
133	C<Coro::Event> to wait on an external event that hopefully wake up a	142	C<Coro::Event> to wait on an external event that hopefully wake up a
134	coroutine so the scheduler can run it.	143	coroutine so the scheduler can run it.
135		144
136	Please note that if your callback recursively invokes perl (e.g. for event	145	Please note that if your callback recursively invokes perl (e.g. for event
137	handlers), then it must be prepared to be called recursively.	146	handlers), then it must be prepared to be called recursively itself.
138		147
139	=cut	148	=cut
140		149
141	$idle = sub {	150	$idle = sub {
142	require Carp;	151	require Carp;
143	Carp::croak ("FATAL: deadlock detected");	152	Carp::croak ("FATAL: deadlock detected");
144	};	153	};
145		154
		155	sub _cancel {
		156	my ($self) = @_;
		157
		158	# free coroutine data and mark as destructed
		159	$self->_destroy
		160	or return;
		161
		162	# call all destruction callbacks
		163	$_->(@{$self->{_status}})
		164	for @{(delete $self->{_on_destroy}) \|\| []};
		165	}
		166
146	# this coroutine is necessary because a coroutine	167	# this coroutine is necessary because a coroutine
147	# cannot destroy itself.	168	# cannot destroy itself.
148	my @destroy;	169	my @destroy;
		170	my $manager;
		171
149	my $manager; $manager = new Coro sub {	172	$manager = new Coro sub {
150	while () {	173	while () {
151	# by overwriting the state object with the manager we destroy it	174	(shift @destroy)->_cancel
152	# while still being able to schedule this coroutine (in case it has
153	# been readied multiple times. this is harmless since the manager
154	# can be called as many times as neccessary and will always
155	# remove itself from the runqueue
156	while (@destroy) {	175	while @destroy;
157	my $coro = pop @destroy;
158	$coro->{status} \|\|= [];
159	$_->ready for @{delete $coro->{join} \|\| []};
160		176
161	# the next line destroys the coro state, but keeps the
162	# coroutine itself intact (we basically make it a zombie
163	# coroutine that always runs the manager thread, so it's possible
164	# to transfer() to this coroutine).
165	$coro->_clone_state_from ($manager);
166	}
167	&schedule;	177	&schedule;
168	}	178	}
169	};	179	};
170		180	$manager->desc ("[coro manager]");
171	# static methods. not really.	181	$manager->prio (PRIO_MAX);
172		182
173	=back	183	=back
174		184
175	=head2 STATIC METHODS	185	=head2 STATIC METHODS
176		186
…		…
182		192
183	Create a new asynchronous coroutine and return it's coroutine object	193	Create a new asynchronous coroutine and return it's coroutine object
184	(usually unused). When the sub returns the new coroutine is automatically	194	(usually unused). When the sub returns the new coroutine is automatically
185	terminated.	195	terminated.
186		196
187	Calling C<exit> in a coroutine will not work correctly, so do not do that.	197	See the C<Coro::State::new> constructor for info about the coroutine
		198	environment in which coroutines run.
188		199
189	When the coroutine dies, the program will exit, just as in the main	200	Calling C<exit> in a coroutine will do the same as calling exit outside
190	program.	201	the coroutine. Likewise, when the coroutine dies, the program will exit,
		202	just as it would in the main program.
191		203
192	# create a new coroutine that just prints its arguments	204	# create a new coroutine that just prints its arguments
193	async {	205	async {
194	print "@_\n";	206	print "@_\n";
195	} 1,2,3,4;	207	} 1,2,3,4;
196		208
197	=cut	209	=cut
198		210
199	sub async(&@) {	211	sub async(&@) {
200	my $pid = new Coro @_;	212	my $coro = new Coro @_;
201	$pid->ready;	213	$coro->ready;
202	$pid	214	$coro
		215	}
		216
		217	=item async_pool { ... } [@args...]
		218
		219	Similar to C<async>, but uses a coroutine pool, so you should not call
		220	terminate or join (although you are allowed to), and you get a coroutine
		221	that might have executed other code already (which can be good or bad :).
		222
		223	Also, the block is executed in an C<eval> context and a warning will be
		224	issued in case of an exception instead of terminating the program, as
		225	C<async> does. As the coroutine is being reused, stuff like C<on_destroy>
		226	will not work in the expected way, unless you call terminate or cancel,
		227	which somehow defeats the purpose of pooling.
		228
		229	The priority will be reset to C<0> after each job, tracing will be
		230	disabled, the description will be reset and the default output filehandle
		231	gets restored, so you can change alkl these. Otherwise the coroutine will
		232	be re-used "as-is": most notably if you change other per-coroutine global
		233	stuff such as C<$/> you need to revert that change, which is most simply
		234	done by using local as in C< local $/ >.
		235
		236	The pool size is limited to 8 idle coroutines (this can be adjusted by
		237	changing $Coro::POOL_SIZE), and there can be as many non-idle coros as
		238	required.
		239
		240	If you are concerned about pooled coroutines growing a lot because a
		241	single C<async_pool> used a lot of stackspace you can e.g. C<async_pool
		242	{ terminate }> once per second or so to slowly replenish the pool. In
		243	addition to that, when the stacks used by a handler grows larger than 16kb
		244	(adjustable with $Coro::POOL_RSS) it will also exit.
		245
		246	=cut
		247
		248	our $POOL_SIZE = 8;
		249	our $POOL_RSS = 16 * 1024;
		250	our @async_pool;
		251
		252	sub pool_handler {
		253	my $cb;
		254
		255	while () {
		256	eval {
		257	while () {
		258	_pool_1 $cb;
		259	&$cb;
		260	_pool_2 $cb;
		261	&schedule;
		262	}
		263	};
		264
		265	last if $@ eq "\3async_pool terminate\2\n";
		266	warn $@ if $@;
		267	}
		268	}
		269
		270	sub async_pool(&@) {
		271	# this is also inlined into the unlock_scheduler
		272	my $coro = (pop @async_pool) \|\| new Coro \&pool_handler;
		273
		274	$coro->{_invoke} = [@_];
		275	$coro->ready;
		276
		277	$coro
203	}	278	}
204		279
205	=item schedule	280	=item schedule
206		281
207	Calls the scheduler. Please note that the current coroutine will not be put	282	Calls the scheduler. Please note that the current coroutine will not be put
…		…
220	# wake up sleeping coroutine	295	# wake up sleeping coroutine
221	$current->ready;	296	$current->ready;
222	undef $current;	297	undef $current;
223	};	298	};
224		299
225	# call schedule until event occured.	300	# call schedule until event occurred.
226	# in case we are woken up for other reasons	301	# in case we are woken up for other reasons
227	# (current still defined), loop.	302	# (current still defined), loop.
228	Coro::schedule while $current;	303	Coro::schedule while $current;
229	}	304	}
230		305
…		…
232		307
233	"Cede" to other coroutines. This function puts the current coroutine into the	308	"Cede" to other coroutines. This function puts the current coroutine into the
234	ready queue and calls C<schedule>, which has the effect of giving up the	309	ready queue and calls C<schedule>, which has the effect of giving up the
235	current "timeslice" to other coroutines of the same or higher priority.	310	current "timeslice" to other coroutines of the same or higher priority.
236		311
		312	=item Coro::cede_notself
		313
		314	Works like cede, but is not exported by default and will cede to any
		315	coroutine, regardless of priority, once.
		316
237	=item terminate [arg...]	317	=item terminate [arg...]
238		318
239	Terminates the current coroutine with the given status values (see L<cancel>).	319	Terminates the current coroutine with the given status values (see L<cancel>).
		320
		321	=item killall
		322
		323	Kills/terminates/cancels all coroutines except the currently running
		324	one. This is useful after a fork, either in the child or the parent, as
		325	usually only one of them should inherit the running coroutines.
240		326
241	=cut	327	=cut
242		328
243	sub terminate {	329	sub terminate {
244	$current->cancel (@_);	330	$current->cancel (@_);
245	}	331	}
246		332
		333	sub killall {
		334	for (Coro::State::list) {
		335	$_->cancel
		336	if $_ != $current && UNIVERSAL::isa $_, "Coro";
		337	}
		338	}
		339
247	=back	340	=back
248
249	# dynamic methods
250		341
251	=head2 COROUTINE METHODS	342	=head2 COROUTINE METHODS
252		343
253	These are the methods you can call on coroutine objects.	344	These are the methods you can call on coroutine objects.
254		345
…		…
259	Create a new coroutine and return it. When the sub returns the coroutine	350	Create a new coroutine and return it. When the sub returns the coroutine
260	automatically terminates as if C<terminate> with the returned values were	351	automatically terminates as if C<terminate> with the returned values were
261	called. To make the coroutine run you must first put it into the ready queue	352	called. To make the coroutine run you must first put it into the ready queue
262	by calling the ready method.	353	by calling the ready method.
263		354
264	Calling C<exit> in a coroutine will not work correctly, so do not do that.	355	See C<async> and C<Coro::State::new> for additional info about the
		356	coroutine environment.
265		357
266	=cut	358	=cut
267		359
268	sub _run_coro {	360	sub _run_coro {
269	terminate &{+shift};	361	terminate &{+shift};
…		…
286	Return wether the coroutine is currently the ready queue or not,	378	Return wether the coroutine is currently the ready queue or not,
287		379
288	=item $coroutine->cancel (arg...)	380	=item $coroutine->cancel (arg...)
289		381
290	Terminates the given coroutine and makes it return the given arguments as	382	Terminates the given coroutine and makes it return the given arguments as
291	status (default: the empty list).	383	status (default: the empty list). Never returns if the coroutine is the
		384	current coroutine.
292		385
293	=cut	386	=cut
294		387
295	sub cancel {	388	sub cancel {
296	my $self = shift;	389	my $self = shift;
297	$self->{status} = [@_];	390	$self->{_status} = [@_];
		391
		392	if ($current == $self) {
298	push @destroy, $self;	393	push @destroy, $self;
299	$manager->ready;	394	$manager->ready;
300	&schedule if $current == $self;	395	&schedule while 1;
		396	} else {
		397	$self->_cancel;
		398	}
301	}	399	}
302		400
303	=item $coroutine->join	401	=item $coroutine->join
304		402
305	Wait until the coroutine terminates and return any values given to the	403	Wait until the coroutine terminates and return any values given to the
306	C<terminate> or C<cancel> functions. C<join> can be called multiple times	404	C<terminate> or C<cancel> functions. C<join> can be called concurrently
307	from multiple coroutine.	405	from multiple coroutines.
308		406
309	=cut	407	=cut
310		408
311	sub join {	409	sub join {
312	my $self = shift;	410	my $self = shift;
		411
313	unless ($self->{status}) {	412	unless ($self->{_status}) {
314	push @{$self->{join}}, $current;	413	my $current = $current;
315	&schedule;	414
		415	push @{$self->{_on_destroy}}, sub {
		416	$current->ready;
		417	undef $current;
		418	};
		419
		420	&schedule while $current;
316	}	421	}
		422
317	wantarray ? @{$self->{status}} : $self->{status}[0];	423	wantarray ? @{$self->{_status}} : $self->{_status}[0];
		424	}
		425
		426	=item $coroutine->on_destroy (\&cb)
		427
		428	Registers a callback that is called when this coroutine gets destroyed,
		429	but before it is joined. The callback gets passed the terminate arguments,
		430	if any.
		431
		432	=cut
		433
		434	sub on_destroy {
		435	my ($self, $cb) = @_;
		436
		437	push @{ $self->{_on_destroy} }, $cb;
318	}	438	}
319		439
320	=item $oldprio = $coroutine->prio ($newprio)	440	=item $oldprio = $coroutine->prio ($newprio)
321		441
322	Sets (or gets, if the argument is missing) the priority of the	442	Sets (or gets, if the argument is missing) the priority of the
…		…
347	=item $olddesc = $coroutine->desc ($newdesc)	467	=item $olddesc = $coroutine->desc ($newdesc)
348		468
349	Sets (or gets in case the argument is missing) the description for this	469	Sets (or gets in case the argument is missing) the description for this
350	coroutine. This is just a free-form string you can associate with a coroutine.	470	coroutine. This is just a free-form string you can associate with a coroutine.
351		471
		472	This method simply sets the C<< $coroutine->{desc} >> member to the given string. You
		473	can modify this member directly if you wish.
		474
		475	=item $coroutine->throw ([$scalar])
		476
		477	If C<$throw> is specified and defined, it will be thrown as an exception
		478	inside the coroutine at the next convinient point in time (usually after
		479	it gains control at the next schedule/transfer/cede). Otherwise clears the
		480	exception object.
		481
		482	The exception object will be thrown "as is" with the specified scalar in
		483	C<$@>, i.e. if it is a string, no line number or newline will be appended
		484	(unlike with C<die>).
		485
		486	This can be used as a softer means than C<cancel> to ask a coroutine to
		487	end itself, although there is no guarentee that the exception will lead to
		488	termination, and if the exception isn't caught it might well end the whole
		489	program.
		490
352	=cut	491	=cut
353		492
354	sub desc {	493	sub desc {
355	my $old = $_[0]{desc};	494	my $old = $_[0]{desc};
356	$_[0]{desc} = $_[1] if @_ > 1;	495	$_[0]{desc} = $_[1] if @_ > 1;
…		…
364	=over 4	503	=over 4
365		504
366	=item Coro::nready	505	=item Coro::nready
367		506
368	Returns the number of coroutines that are currently in the ready state,	507	Returns the number of coroutines that are currently in the ready state,
369	i.e. that can be swicthed to. The value C<0> means that the only runnable	508	i.e. that can be switched to. The value C<0> means that the only runnable
370	coroutine is the currently running one, so C<cede> would have no effect,	509	coroutine is the currently running one, so C<cede> would have no effect,
371	and C<schedule> would cause a deadlock unless there is an idle handler	510	and C<schedule> would cause a deadlock unless there is an idle handler
372	that wakes up some coroutines.	511	that wakes up some coroutines.
		512
		513	=item my $guard = Coro::guard { ... }
		514
		515	This creates and returns a guard object. Nothing happens until the object
		516	gets destroyed, in which case the codeblock given as argument will be
		517	executed. This is useful to free locks or other resources in case of a
		518	runtime error or when the coroutine gets canceled, as in both cases the
		519	guard block will be executed. The guard object supports only one method,
		520	C<< ->cancel >>, which will keep the codeblock from being executed.
		521
		522	Example: set some flag and clear it again when the coroutine gets canceled
		523	or the function returns:
		524
		525	sub do_something {
		526	my $guard = Coro::guard { $busy = 0 };
		527	$busy = 1;
		528
		529	# do something that requires $busy to be true
		530	}
		531
		532	=cut
		533
		534	sub guard(&) {
		535	bless \(my $cb = $_[0]), "Coro::guard"
		536	}
		537
		538	sub Coro::guard::cancel {
		539	${$_[0]} = sub { };
		540	}
		541
		542	sub Coro::guard::DESTROY {
		543	${$_[0]}->();
		544	}
		545
373		546
374	=item unblock_sub { ... }	547	=item unblock_sub { ... }
375		548
376	This utility function takes a BLOCK or code reference and "unblocks" it,	549	This utility function takes a BLOCK or code reference and "unblocks" it,
377	returning the new coderef. This means that the new coderef will return	550	returning the new coderef. This means that the new coderef will return
378	immediately without blocking, returning nothing, while the original code	551	immediately without blocking, returning nothing, while the original code
379	ref will be called (with parameters) from within its own coroutine.	552	ref will be called (with parameters) from within its own coroutine.
380		553
381	The reason this fucntion exists is that many event libraries (such as the	554	The reason this function exists is that many event libraries (such as the
382	venerable L<Event\|Event> module) are not coroutine-safe (a weaker form	555	venerable L<Event\|Event> module) are not coroutine-safe (a weaker form
383	of thread-safety). This means you must not block within event callbacks,	556	of thread-safety). This means you must not block within event callbacks,
384	otherwise you might suffer from crashes or worse.	557	otherwise you might suffer from crashes or worse.
385		558
386	This function allows your callbacks to block by executing them in another	559	This function allows your callbacks to block by executing them in another
…		…
391	In short: simply use C<unblock_sub { ... }> instead of C<sub { ... }> when	564	In short: simply use C<unblock_sub { ... }> instead of C<sub { ... }> when
392	creating event callbacks that want to block.	565	creating event callbacks that want to block.
393		566
394	=cut	567	=cut
395		568
396	our @unblock_pool;
397	our @unblock_queue;	569	our @unblock_queue;
398	our $UNBLOCK_POOL_SIZE = 2;
399		570
400	sub unblock_handler_ {	571	# we create a special coro because we want to cede,
401	while () {	572	# to reduce pressure on the coro pool (because most callbacks
402	my ($cb, @arg) = @{ delete $Coro::current->{arg} };	573	# return immediately and can be reused) and because we cannot cede
403	$cb->(@arg);	574	# inside an event callback.
404
405	last if @unblock_pool >= $UNBLOCK_POOL_SIZE;
406	push @unblock_pool, $Coro::current;
407	schedule;
408	}
409	}
410
411	our $unblock_scheduler = async {	575	our $unblock_scheduler = new Coro sub {
412	while () {	576	while () {
413	while (my $cb = pop @unblock_queue) {	577	while (my $cb = pop @unblock_queue) {
414	my $handler = (pop @unblock_pool or new Coro \&unblock_handler_);	578	# this is an inlined copy of async_pool
415	$handler->{arg} = $cb;	579	my $coro = (pop @async_pool) \|\| new Coro \&pool_handler;
		580
		581	$coro->{_invoke} = $cb;
416	$handler->ready;	582	$coro->ready;
417	cede;	583	cede; # for short-lived callbacks, this reduces pressure on the coro pool
418	}	584	}
419		585	schedule; # sleep well
420	schedule;
421	}	586	}
422	};	587	};
		588	$unblock_scheduler->desc ("[unblock_sub scheduler]");
423		589
424	sub unblock_sub(&) {	590	sub unblock_sub(&) {
425	my $cb = shift;	591	my $cb = shift;
426		592
427	sub {	593	sub {
428	push @unblock_queue, [$cb, @_];	594	unshift @unblock_queue, [$cb, @_];
429	$unblock_scheduler->ready;	595	$unblock_scheduler->ready;
430	}	596	}
431	}	597	}
432		598
433	=back	599	=back
…		…
440		606
441	- you must make very sure that no coro is still active on global	607	- you must make very sure that no coro is still active on global
442	destruction. very bad things might happen otherwise (usually segfaults).	608	destruction. very bad things might happen otherwise (usually segfaults).
443		609
444	- this module is not thread-safe. You should only ever use this module	610	- this module is not thread-safe. You should only ever use this module
445	from the same thread (this requirement might be losened in the future	611	from the same thread (this requirement might be loosened in the future
446	to allow per-thread schedulers, but Coro::State does not yet allow	612	to allow per-thread schedulers, but Coro::State does not yet allow
447	this).	613	this).
448		614
449	=head1 SEE ALSO	615	=head1 SEE ALSO
450		616
		617	Lower level Configuration, Coroutine Environment: L<Coro::State>.
		618
		619	Debugging: L<Coro::Debug>.
		620
451	Support/Utility: L<Coro::Cont>, L<Coro::Specific>, L<Coro::State>, L<Coro::Util>.	621	Support/Utility: L<Coro::Specific>, L<Coro::Util>.
452		622
453	Locking/IPC: L<Coro::Signal>, L<Coro::Channel>, L<Coro::Semaphore>, L<Coro::SemaphoreSet>, L<Coro::RWLock>.	623	Locking/IPC: L<Coro::Signal>, L<Coro::Channel>, L<Coro::Semaphore>, L<Coro::SemaphoreSet>, L<Coro::RWLock>.
454		624
455	Event/IO: L<Coro::Timer>, L<Coro::Event>, L<Coro::Handle>, L<Coro::Socket>, L<Coro::Select>.	625	Event/IO: L<Coro::Timer>, L<Coro::Event>, L<Coro::Handle>, L<Coro::Socket>.
456		626
		627	Compatibility: L<Coro::LWP>, L<Coro::Storable>, L<Coro::Select>.
		628
457	Embedding: L<Coro:MakeMaker>	629	Embedding: L<Coro::MakeMaker>.
458		630
459	=head1 AUTHOR	631	=head1 AUTHOR
460		632
461	Marc Lehmann <schmorp@schmorp.de>	633	Marc Lehmann <schmorp@schmorp.de>
462	http://home.schmorp.de/	634	http://home.schmorp.de/

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Comparing cvsroot/Coro/Coro.pm (file contents): Revision 1.100 by root, Tue Dec 12 13:56:45 2006 UTC vs. Revision 1.178 by root, Thu Apr 17 22:33:10 2008 UTC

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Comparing cvsroot/Coro/Coro.pm (file contents):
Revision 1.100 by root, Tue Dec 12 13:56:45 2006 UTC vs.
Revision 1.178 by root, Thu Apr 17 22:33:10 2008 UTC