[ViewVC] Diff of: cvs/IO-AIO/AIO.pm

Comparing IO-AIO/AIO.pm (file contents):
Revision 1.32 by root, Wed Aug 17 05:26:20 2005 UTC vs.
Revision 1.54 by root, Sun Oct 22 00:19:05 2006 UTC

…		…
14	aio_unlink "/tmp/file", sub { };	14	aio_unlink "/tmp/file", sub { };
15		15
16	aio_read $fh, 30000, 1024, $buffer, 0, sub {	16	aio_read $fh, 30000, 1024, $buffer, 0, sub {
17	$_[0] > 0 or die "read error: $!";	17	$_[0] > 0 or die "read error: $!";
18	};	18	};
		19
		20	use IO::AIO 2; # version has aio objects
		21
		22	my $req = aio_unlink "/tmp/file", sub { };
		23	$req->cancel; # cancel request if still in queue
		24
		25	# AnyEvent
		26	open my $fh, "<&=" . IO::AIO::poll_fileno or die "$!";
		27	my $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { IO::AIO::poll_cb });
19		28
20	# Event	29	# Event
21	Event->io (fd => IO::AIO::poll_fileno,	30	Event->io (fd => IO::AIO::poll_fileno,
22	poll => 'r',	31	poll => 'r',
23	cb => \&IO::AIO::poll_cb);	32	cb => \&IO::AIO::poll_cb);
…		…
57	=cut	66	=cut
58		67
59	package IO::AIO;	68	package IO::AIO;
60		69
61	no warnings;	70	no warnings;
		71	use strict 'vars';
62		72
63	use base 'Exporter';	73	use base 'Exporter';
64		74
65	use Fcntl ();
66
67	BEGIN {	75	BEGIN {
68	$VERSION = 1.3;	76	our $VERSION = '1.99';
69		77
70
71	@EXPORT = qw(aio_read aio_write aio_open aio_close aio_stat aio_lstat aio_unlink	78	our @EXPORT = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat
72	aio_rmdir aio_symlink aio_fsync aio_fdatasync aio_readahead);	79	aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink
		80	aio_fsync aio_fdatasync aio_readahead aio_rename aio_link aio_move
		81	aio_group);
73	@EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs);	82	our @EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs);
		83
		84	@IO::AIO::GRP::ISA = 'IO::AIO::REQ';
74		85
75	require XSLoader;	86	require XSLoader;
76	XSLoader::load IO::AIO, $VERSION;	87	XSLoader::load ("IO::AIO", $VERSION);
77	}	88	}
78		89
79	=head1 FUNCTIONS	90	=head1 FUNCTIONS
80		91
81	=head2 AIO FUNCTIONS	92	=head2 AIO FUNCTIONS
…		…
89	syscall has been executed asynchronously.	100	syscall has been executed asynchronously.
90		101
91	All functions expecting a filehandle keep a copy of the filehandle	102	All functions expecting a filehandle keep a copy of the filehandle
92	internally until the request has finished.	103	internally until the request has finished.
93		104
		105	All non-composite requests (requests that are not broken down into
		106	multiple requests) return objects of type L<IO::AIO::REQ> that allow
		107	further manipulation of running requests.
		108
94	The pathnames you pass to these routines I<must> be absolute and	109	The pathnames you pass to these routines I<must> be absolute and
95	encoded in byte form. The reason for the former is that at the time the	110	encoded in byte form. The reason for the former is that at the time the
96	request is being executed, the current working directory could have	111	request is being executed, the current working directory could have
97	changed. Alternatively, you can make sure that you never change the	112	changed. Alternatively, you can make sure that you never change the
98	current working directory.	113	current working directory.
…		…
104	environment, d) use Glib::filename_from_unicode on unicode filenames or e)	119	environment, d) use Glib::filename_from_unicode on unicode filenames or e)
105	use something else.	120	use something else.
106		121
107	=over 4	122	=over 4
108		123
109	=item aio_open $pathname, $flags, $mode, $callback	124	=item aio_open $pathname, $flags, $mode, $callback->($fh)
110		125
111	Asynchronously open or create a file and call the callback with a newly	126	Asynchronously open or create a file and call the callback with a newly
112	created filehandle for the file.	127	created filehandle for the file.
113		128
114	The pathname passed to C<aio_open> must be absolute. See API NOTES, above,	129	The pathname passed to C<aio_open> must be absolute. See API NOTES, above,
…		…
131	} else {	146	} else {
132	die "open failed: $!\n";	147	die "open failed: $!\n";
133	}	148	}
134	};	149	};
135		150
136	=item aio_close $fh, $callback	151	=item aio_close $fh, $callback->($status)
137		152
138	Asynchronously close a file and call the callback with the result	153	Asynchronously close a file and call the callback with the result
139	code. I<WARNING:> although accepted, you should not pass in a perl	154	code. I<WARNING:> although accepted, you should not pass in a perl
140	filehandle here, as perl will likely close the file descriptor another	155	filehandle here, as perl will likely close the file descriptor another
141	time when the filehandle is destroyed. Normally, you can safely call perls	156	time when the filehandle is destroyed. Normally, you can safely call perls
142	C<close> or just let filehandles go out of scope.	157	C<close> or just let filehandles go out of scope.
143		158
144	This is supposed to be a bug in the API, so that might change. It's	159	This is supposed to be a bug in the API, so that might change. It's
145	therefore best to avoid this function.	160	therefore best to avoid this function.
146		161
147	=item aio_read $fh,$offset,$length, $data,$dataoffset,$callback	162	=item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
148		163
149	=item aio_write $fh,$offset,$length, $data,$dataoffset,$callback	164	=item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
150		165
151	Reads or writes C<length> bytes from the specified C<fh> and C<offset>	166	Reads or writes C<length> bytes from the specified C<fh> and C<offset>
152	into the scalar given by C<data> and offset C<dataoffset> and calls the	167	into the scalar given by C<data> and offset C<dataoffset> and calls the
153	callback without the actual number of bytes read (or -1 on error, just	168	callback without the actual number of bytes read (or -1 on error, just
154	like the syscall).	169	like the syscall).
…		…
163	aio_read $fh, 7, 15, $buffer, 0, sub {	178	aio_read $fh, 7, 15, $buffer, 0, sub {
164	$_[0] > 0 or die "read error: $!";	179	$_[0] > 0 or die "read error: $!";
165	print "read $_[0] bytes: <$buffer>\n";	180	print "read $_[0] bytes: <$buffer>\n";
166	};	181	};
167		182
		183	=item aio_move $srcpath, $dstpath, $callback->($status)
		184
		185	Try to move the I<file> (directories not supported as either source or
		186	destination) from C<$srcpath> to C<$dstpath> and call the callback with
		187	the C<0> (error) or C<-1> ok.
		188
		189	This is a composite request that tries to rename(2) the file first. If
		190	rename files with C<EXDEV>, it creates the destination file with mode 0200
		191	and copies the contents of the source file into it using C<aio_sendfile>,
		192	followed by restoring atime, mtime, access mode and uid/gid, in that
		193	order, and unlinking the C<$srcpath>.
		194
		195	If an error occurs, the partial destination file will be unlinked, if
		196	possible, except when setting atime, mtime, access mode and uid/gid, where
		197	errors are being ignored.
		198
		199	=cut
		200
		201	sub aio_move($$$) {
		202	my ($src, $dst, $cb) = @_;
		203
		204	aio_rename $src, $dst, sub {
		205	if ($_[0] && $! == EXDEV) {
		206	aio_open $src, O_RDONLY, 0, sub {
		207	if (my $src_fh = $_[0]) {
		208	my @stat = stat $src_fh;
		209
		210	aio_open $dst, O_WRONLY, 0200, sub {
		211	if (my $dst_fh = $_[0]) {
		212	aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub {
		213	close $src_fh;
		214
		215	if ($_[0] == $stat[7]) {
		216	utime $stat[8], $stat[9], $dst;
		217	chmod $stat[2] & 07777, $dst_fh;
		218	chown $stat[4], $stat[5], $dst_fh;
		219	close $dst_fh;
		220
		221	aio_unlink $src, sub {
		222	$cb->($_[0]);
		223	};
		224	} else {
		225	my $errno = $!;
		226	aio_unlink $dst, sub {
		227	$! = $errno;
		228	$cb->(-1);
		229	};
		230	}
		231	};
		232	} else {
		233	$cb->(-1);
		234	}
		235	},
		236
		237	} else {
		238	$cb->(-1);
		239	}
		240	};
		241	} else {
		242	$cb->($_[0]);
		243	}
		244	};
		245	}
		246
		247	=item aio_sendfile $out_fh, $in_fh, $in_offset, $length, $callback->($retval)
		248
		249	Tries to copy C<$length> bytes from C<$in_fh> to C<$out_fh>. It starts
		250	reading at byte offset C<$in_offset>, and starts writing at the current
		251	file offset of C<$out_fh>. Because of that, it is not safe to issue more
		252	than one C<aio_sendfile> per C<$out_fh>, as they will interfere with each
		253	other.
		254
		255	This call tries to make use of a native C<sendfile> syscall to provide
		256	zero-copy operation. For this to work, C<$out_fh> should refer to a
		257	socket, and C<$in_fh> should refer to mmap'able file.
		258
		259	If the native sendfile call fails or is not implemented, it will be
		260	emulated, so you can call C<aio_sendfile> on any type of filehandle
		261	regardless of the limitations of the operating system.
		262
		263	Please note, however, that C<aio_sendfile> can read more bytes from
		264	C<$in_fh> than are written, and there is no way to find out how many
		265	bytes have been read from C<aio_sendfile> alone, as C<aio_sendfile> only
		266	provides the number of bytes written to C<$out_fh>. Only if the result
		267	value equals C<$length> one can assume that C<$length> bytes have been
		268	read.
		269
168	=item aio_readahead $fh,$offset,$length, $callback	270	=item aio_readahead $fh,$offset,$length, $callback->($retval)
169		271
170	C<aio_readahead> populates the page cache with data from a file so that	272	C<aio_readahead> populates the page cache with data from a file so that
171	subsequent reads from that file will not block on disk I/O. The C<$offset>	273	subsequent reads from that file will not block on disk I/O. The C<$offset>
172	argument specifies the starting point from which data is to be read and	274	argument specifies the starting point from which data is to be read and
173	C<$length> specifies the number of bytes to be read. I/O is performed in	275	C<$length> specifies the number of bytes to be read. I/O is performed in
…		…
177	file. The current file offset of the file is left unchanged.	279	file. The current file offset of the file is left unchanged.
178		280
179	If that syscall doesn't exist (likely if your OS isn't Linux) it will be	281	If that syscall doesn't exist (likely if your OS isn't Linux) it will be
180	emulated by simply reading the data, which would have a similar effect.	282	emulated by simply reading the data, which would have a similar effect.
181		283
182	=item aio_stat $fh_or_path, $callback	284	=item aio_stat $fh_or_path, $callback->($status)
183		285
184	=item aio_lstat $fh, $callback	286	=item aio_lstat $fh, $callback->($status)
185		287
186	Works like perl's C<stat> or C<lstat> in void context. The callback will	288	Works like perl's C<stat> or C<lstat> in void context. The callback will
187	be called after the stat and the results will be available using C<stat _>	289	be called after the stat and the results will be available using C<stat _>
188	or C<-s _> etc...	290	or C<-s _> etc...
189		291
…		…
199	aio_stat "/etc/passwd", sub {	301	aio_stat "/etc/passwd", sub {
200	$_[0] and die "stat failed: $!";	302	$_[0] and die "stat failed: $!";
201	print "size is ", -s _, "\n";	303	print "size is ", -s _, "\n";
202	};	304	};
203		305
204	=item aio_unlink $pathname, $callback	306	=item aio_unlink $pathname, $callback->($status)
205		307
206	Asynchronously unlink (delete) a file and call the callback with the	308	Asynchronously unlink (delete) a file and call the callback with the
207	result code.	309	result code.
208		310
		311	=item aio_link $srcpath, $dstpath, $callback->($status)
		312
		313	Asynchronously create a new link to the existing object at C<$srcpath> at
		314	the path C<$dstpath> and call the callback with the result code.
		315
		316	=item aio_symlink $srcpath, $dstpath, $callback->($status)
		317
		318	Asynchronously create a new symbolic link to the existing object at C<$srcpath> at
		319	the path C<$dstpath> and call the callback with the result code.
		320
		321	=item aio_rename $srcpath, $dstpath, $callback->($status)
		322
		323	Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as
		324	rename(2) and call the callback with the result code.
		325
209	=item aio_rmdir $pathname, $callback	326	=item aio_rmdir $pathname, $callback->($status)
210		327
211	Asynchronously rmdir (delete) a directory and call the callback with the	328	Asynchronously rmdir (delete) a directory and call the callback with the
212	result code.	329	result code.
213		330
		331	=item aio_readdir $pathname, $callback->($entries)
		332
		333	Unlike the POSIX call of the same name, C<aio_readdir> reads an entire
		334	directory (i.e. opendir + readdir + closedir). The entries will not be
		335	sorted, and will B<NOT> include the C<.> and C<..> entries.
		336
		337	The callback a single argument which is either C<undef> or an array-ref
		338	with the filenames.
		339
		340	=item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs)
		341
		342	Scans a directory (similar to C<aio_readdir>) but additionally tries to
		343	separate the entries of directory C<$path> into two sets of names, ones
		344	you can recurse into (directories or links to them), and ones you cannot
		345	recurse into (everything else).
		346
		347	C<aio_scandir> is a composite request that consists of many sub
		348	requests. C<$maxreq> specifies the maximum number of outstanding aio
		349	requests that this function generates. If it is C<< <= 0 >>, then a
		350	suitable default will be chosen (currently 8).
		351
		352	On error, the callback is called without arguments, otherwise it receives
		353	two array-refs with path-relative entry names.
		354
		355	Example:
		356
		357	aio_scandir $dir, 0, sub {
		358	my ($dirs, $nondirs) = @_;
		359	print "real directories: @$dirs\n";
		360	print "everything else: @$nondirs\n";
		361	};
		362
		363	Implementation notes.
		364
		365	The C<aio_readdir> cannot be avoided, but C<stat()>'ing every entry can.
		366
		367	After reading the directory, the modification time, size etc. of the
		368	directory before and after the readdir is checked, and if they match (and
		369	isn't the current time), the link count will be used to decide how many
		370	entries are directories (if >= 2). Otherwise, no knowledge of the number
		371	of subdirectories will be assumed.
		372
		373	Then entries will be sorted into likely directories (everything without
		374	a non-initial dot currently) and likely non-directories (everything
		375	else). Then every entry plus an appended C</.> will be C<stat>'ed,
		376	likely directories first. If that succeeds, it assumes that the entry
		377	is a directory or a symlink to directory (which will be checked
		378	seperately). This is often faster than stat'ing the entry itself because
		379	filesystems might detect the type of the entry without reading the inode
		380	data (e.g. ext2fs filetype feature).
		381
		382	If the known number of directories (link count - 2) has been reached, the
		383	rest of the entries is assumed to be non-directories.
		384
		385	This only works with certainty on POSIX (= UNIX) filesystems, which
		386	fortunately are the vast majority of filesystems around.
		387
		388	It will also likely work on non-POSIX filesystems with reduced efficiency
		389	as those tend to return 0 or 1 as link counts, which disables the
		390	directory counting heuristic.
		391
		392	=cut
		393
		394	sub aio_scandir($$$) {
		395	my ($path, $maxreq, $cb) = @_;
		396
		397	$maxreq = 8 if $maxreq <= 0;
		398
		399	# stat once
		400	aio_stat $path, sub {
		401	return $cb->() if $_[0];
		402	my $now = time;
		403	my $hash1 = join ":", (stat _)[0,1,3,7,9];
		404
		405	# read the directory entries
		406	aio_readdir $path, sub {
		407	my $entries = shift
		408	or return $cb->();
		409
		410	# stat the dir another time
		411	aio_stat $path, sub {
		412	my $hash2 = join ":", (stat _)[0,1,3,7,9];
		413
		414	my $ndirs;
		415
		416	# take the slow route if anything looks fishy
		417	if ($hash1 ne $hash2 or (stat _)[9] == $now) {
		418	$ndirs = -1;
		419	} else {
		420	# if nlink == 2, we are finished
		421	# on non-posix-fs's, we rely on nlink < 2
		422	$ndirs = (stat _)[3] - 2
		423	or return $cb->([], $entries);
		424	}
		425
		426	# sort into likely dirs and likely nondirs
		427	# dirs == files without ".", short entries first
		428	$entries = [map $_->[0],
		429	sort { $b->[1] cmp $a->[1] }
		430	map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length],
		431	@$entries];
		432
		433	my (@dirs, @nondirs);
		434
		435	my ($statcb, $schedcb);
		436	my $nreq = 0;
		437
		438	$schedcb = sub {
		439	if (@$entries) {
		440	if ($nreq < $maxreq) {
		441	my $ent = pop @$entries;
		442	$nreq++;
		443	aio_stat "$path/$ent/.", sub { $statcb->($_[0], $ent) };
		444	}
		445	} elsif (!$nreq) {
		446	# finished
		447	undef $statcb;
		448	undef $schedcb;
		449	$cb->(\@dirs, \@nondirs) if $cb;
		450	undef $cb;
		451	}
		452	};
		453	$statcb = sub {
		454	my ($status, $entry) = @_;
		455
		456	if ($status < 0) {
		457	$nreq--;
		458	push @nondirs, $entry;
		459	&$schedcb;
		460	} else {
		461	# need to check for real directory
		462	aio_lstat "$path/$entry", sub {
		463	$nreq--;
		464
		465	if (-d _) {
		466	push @dirs, $entry;
		467
		468	if (!--$ndirs) {
		469	push @nondirs, @$entries;
		470	$entries = [];
		471	}
		472	} else {
		473	push @nondirs, $entry;
		474	}
		475
		476	&$schedcb;
		477	}
		478	}
		479	};
		480
		481	&$schedcb while @$entries && $nreq < $maxreq;
		482	};
		483	};
		484	};
		485	}
		486
214	=item aio_fsync $fh, $callback	487	=item aio_fsync $fh, $callback->($status)
215		488
216	Asynchronously call fsync on the given filehandle and call the callback	489	Asynchronously call fsync on the given filehandle and call the callback
217	with the fsync result code.	490	with the fsync result code.
218		491
219	=item aio_fdatasync $fh, $callback	492	=item aio_fdatasync $fh, $callback->($status)
220		493
221	Asynchronously call fdatasync on the given filehandle and call the	494	Asynchronously call fdatasync on the given filehandle and call the
222	callback with the fdatasync result code.	495	callback with the fdatasync result code.
223		496
224	If this call isn't available because your OS lacks it or it couldn't be	497	If this call isn't available because your OS lacks it or it couldn't be
225	detected, it will be emulated by calling C<fsync> instead.	498	detected, it will be emulated by calling C<fsync> instead.
		499
		500	=item aio_group $callback->()
		501
		502	=item aio_sleep $fractional_seconds, $callback->() NOT EXPORTED
		503
		504	Mainly used for debugging and benchmarking, this aio request puts one of
		505	the request workers to sleep for the given time.
		506
		507	=back
		508
		509	=head2 IO::AIO::REQ CLASS
		510
		511	All non-aggregate C<aio_*> functions return an object of this class when
		512	called in non-void context.
		513
		514	A request always moves through the following five states in its lifetime,
		515	in order: B<ready> (request has been created, but has not been executed
		516	yet), B<execute> (request is currently being executed), B<pending>
		517	(request has been executed but callback has not been called yet),
		518	B<result> (results are being processed synchronously, includes calling the
		519	callback) and B<done> (request has reached the end of its lifetime and
		520	holds no resources anymore).
		521
		522	=over 4
		523
		524	=item $req->cancel
		525
		526	Cancels the request, if possible. Has the effect of skipping execution
		527	when entering the B<execute> state and skipping calling the callback when
		528	entering the the B<result> state, but will leave the request otherwise
		529	untouched. That means that requests that currently execute will not be
		530	stopped and resources held by the request will not be freed prematurely.
226		531
227	=back	532	=back
228		533
229	=head2 SUPPORT FUNCTIONS	534	=head2 SUPPORT FUNCTIONS
230		535
…		…
288	IO::AIO::poll_wait, IO::AIO::poll_cb	593	IO::AIO::poll_wait, IO::AIO::poll_cb
289	if IO::AIO::nreqs;	594	if IO::AIO::nreqs;
290		595
291	=item IO::AIO::min_parallel $nthreads	596	=item IO::AIO::min_parallel $nthreads
292		597
293	Set the minimum number of AIO threads to C<$nthreads>. The default is	598	Set the minimum number of AIO threads to C<$nthreads>. The current default
294	C<1>, which means a single asynchronous operation can be done at one time	599	is C<4>, which means four asynchronous operations can be done at one time
295	(the number of outstanding operations, however, is unlimited).	600	(the number of outstanding operations, however, is unlimited).
		601
		602	IO::AIO starts threads only on demand, when an AIO request is queued and
		603	no free thread exists.
296		604
297	It is recommended to keep the number of threads low, as some Linux	605	It is recommended to keep the number of threads low, as some Linux
298	kernel versions will scale negatively with the number of threads (higher	606	kernel versions will scale negatively with the number of threads (higher
299	parallelity => MUCH higher latency). With current Linux 2.6 versions, 4-32	607	parallelity => MUCH higher latency). With current Linux 2.6 versions, 4-32
300	threads should be fine.	608	threads should be fine.
301		609
302	Under normal circumstances you don't need to call this function, as this	610	Under most circumstances you don't need to call this function, as the
303	module automatically starts some threads (the exact number might change,	611	module selects a default that is suitable for low to moderate load.
304	and is currently 4).
305		612
306	=item IO::AIO::max_parallel $nthreads	613	=item IO::AIO::max_parallel $nthreads
307		614
308	Sets the maximum number of AIO threads to C<$nthreads>. If more than	615	Sets the maximum number of AIO threads to C<$nthreads>. If more than the
309	the specified number of threads are currently running, kill them. This	616	specified number of threads are currently running, this function kills
310	function blocks until the limit is reached.	617	them. This function blocks until the limit is reached.
		618
		619	While C<$nthreads> are zero, aio requests get queued but not executed
		620	until the number of threads has been increased again.
311		621
312	This module automatically runs C<max_parallel 0> at program end, to ensure	622	This module automatically runs C<max_parallel 0> at program end, to ensure
313	that all threads are killed and that there are no outstanding requests.	623	that all threads are killed and that there are no outstanding requests.
314		624
315	Under normal circumstances you don't need to call this function.	625	Under normal circumstances you don't need to call this function.
…		…
319	Sets the maximum number of outstanding requests to C<$nreqs>. If you	629	Sets the maximum number of outstanding requests to C<$nreqs>. If you
320	try to queue up more than this number of requests, the caller will block until	630	try to queue up more than this number of requests, the caller will block until
321	some requests have been handled.	631	some requests have been handled.
322		632
323	The default is very large, so normally there is no practical limit. If you	633	The default is very large, so normally there is no practical limit. If you
324	queue up many requests in a loop it it often improves speed if you set	634	queue up many requests in a loop it often improves speed if you set
325	this to a relatively low number, such as C<100>.	635	this to a relatively low number, such as C<100>.
326		636
327	Under normal circumstances you don't need to call this function.	637	Under normal circumstances you don't need to call this function.
328		638
329	=back	639	=back
…		…
354		664
355	1;	665	1;
356		666
357	=head2 FORK BEHAVIOUR	667	=head2 FORK BEHAVIOUR
358		668
		669	This module should do "the right thing" when the process using it forks:
		670
359	Before the fork IO::AIO enters a quiescent state where no requests can be	671	Before the fork, IO::AIO enters a quiescent state where no requests
360	added in other threads and no results will be processed. After the fork	672	can be added in other threads and no results will be processed. After
361	the parent simply leaves the quiescent state and continues request/result	673	the fork the parent simply leaves the quiescent state and continues
362	processing, while the child clears the request/result queue and starts the	674	request/result processing, while the child clears the request/result
363	same number of threads as were in use by the parent.	675	queue (so the requests started before the fork will only be handled in
		676	the parent). Threads will be started on demand until the limit ste in the
		677	parent process has been reached again.
		678
		679	In short: the parent will, after a short pause, continue as if fork had
		680	not been called, while the child will act as if IO::AIO has not been used
		681	yet.
364		682
365	=head1 SEE ALSO	683	=head1 SEE ALSO
366		684
367	L<Coro>, L<Linux::AIO>.	685	L<Coro>, L<Linux::AIO> (obsolete).
368		686
369	=head1 AUTHOR	687	=head1 AUTHOR
370		688
371	Marc Lehmann <schmorp@schmorp.de>	689	Marc Lehmann <schmorp@schmorp.de>
372	http://home.schmorp.de/	690	http://home.schmorp.de/

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Comparing IO-AIO/AIO.pm (file contents): Revision 1.32 by root, Wed Aug 17 05:26:20 2005 UTC vs. Revision 1.54 by root, Sun Oct 22 00:19:05 2006 UTC

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Revision 1.32 by root, Wed Aug 17 05:26:20 2005 UTC vs.
Revision 1.54 by root, Sun Oct 22 00:19:05 2006 UTC