[ViewVC] Diff of: cvs/IO-AIO/README

Comparing IO-AIO/README (file contents):
Revision 1.34 by root, Thu Nov 20 09:01:40 2008 UTC vs.
Revision 1.47 by root, Fri May 27 00:44:49 2011 UTC

…		…
2	IO::AIO - Asynchronous Input/Output	2	IO::AIO - Asynchronous Input/Output
3		3
4	SYNOPSIS	4	SYNOPSIS
5	use IO::AIO;	5	use IO::AIO;
6		6
7	aio_open "/etc/passwd", O_RDONLY, 0, sub {	7	aio_open "/etc/passwd", IO::AIO::O_RDONLY, 0, sub {
8	my $fh = shift	8	my $fh = shift
9	or die "/etc/passwd: $!";	9	or die "/etc/passwd: $!";
10	...	10	...
11	};	11	};
12		12
…		…
24	$req->cancel; # cancel request if still in queue	24	$req->cancel; # cancel request if still in queue
25		25
26	my $grp = aio_group sub { print "all stats done\n" };	26	my $grp = aio_group sub { print "all stats done\n" };
27	add $grp aio_stat "..." for ...;	27	add $grp aio_stat "..." for ...;
28		28
29	# AnyEvent integration (EV, Event, Glib, Tk, POE, urxvt, pureperl...)
30	use AnyEvent::AIO;
31
32	# EV integration
33	my $w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb;
34
35	# Event integration
36	Event->io (fd => IO::AIO::poll_fileno,
37	poll => 'r',
38	cb => \&IO::AIO::poll_cb);
39
40	# Glib/Gtk2 integration
41	add_watch Glib::IO IO::AIO::poll_fileno,
42	in => sub { IO::AIO::poll_cb; 1 };
43
44	# Tk integration
45	Tk::Event::IO->fileevent (IO::AIO::poll_fileno, "",
46	readable => \&IO::AIO::poll_cb);
47
48	# Danga::Socket integration
49	Danga::Socket->AddOtherFds (IO::AIO::poll_fileno =>
50	\&IO::AIO::poll_cb);
51
52	DESCRIPTION	29	DESCRIPTION
53	This module implements asynchronous I/O using whatever means your	30	This module implements asynchronous I/O using whatever means your
54	operating system supports.	31	operating system supports. It is implemented as an interface to "libeio"
		32	(<http://software.schmorp.de/pkg/libeio.html>).
55		33
56	Asynchronous means that operations that can normally block your program	34	Asynchronous means that operations that can normally block your program
57	(e.g. reading from disk) will be done asynchronously: the operation will	35	(e.g. reading from disk) will be done asynchronously: the operation will
58	still block, but you can do something else in the meantime. This is	36	still block, but you can do something else in the meantime. This is
59	extremely useful for programs that need to stay interactive even when	37	extremely useful for programs that need to stay interactive even when
…		…
64	operations concurrently.	42	operations concurrently.
65		43
66	While most of this works on all types of file descriptors (for example	44	While most of this works on all types of file descriptors (for example
67	sockets), using these functions on file descriptors that support	45	sockets), using these functions on file descriptors that support
68	nonblocking operation (again, sockets, pipes etc.) is very inefficient.	46	nonblocking operation (again, sockets, pipes etc.) is very inefficient.
69	Use an event loop for that (such as the Event module): IO::AIO will	47	Use an event loop for that (such as the EV module): IO::AIO will
70	naturally fit into such an event loop itself.	48	naturally fit into such an event loop itself.
71		49
72	In this version, a number of threads are started that execute your	50	In this version, a number of threads are started that execute your
73	requests and signal their completion. You don't need thread support in	51	requests and signal their completion. You don't need thread support in
74	perl, and the threads created by this module will not be visible to	52	perl, and the threads created by this module will not be visible to
…		…
83	it is currently not reentrant in any way, so use appropriate locking	61	it is currently not reentrant in any way, so use appropriate locking
84	yourself, always call "poll_cb" from within the same thread, or never	62	yourself, always call "poll_cb" from within the same thread, or never
85	call "poll_cb" (or other "aio_" functions) recursively.	63	call "poll_cb" (or other "aio_" functions) recursively.
86		64
87	EXAMPLE	65	EXAMPLE
88	This is a simple example that uses the Event module and loads	66	This is a simple example that uses the EV module and loads /etc/passwd
89	/etc/passwd asynchronously:	67	asynchronously:
90		68
91	use Fcntl;	69	use Fcntl;
92	use Event;	70	use EV;
93	use IO::AIO;	71	use IO::AIO;
94		72
95	# register the IO::AIO callback with Event	73	# register the IO::AIO callback with EV
96	Event->io (fd => IO::AIO::poll_fileno,	74	my $aio_w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb;
97	poll => 'r',
98	cb => \&IO::AIO::poll_cb);
99		75
100	# queue the request to open /etc/passwd	76	# queue the request to open /etc/passwd
101	aio_open "/etc/passwd", O_RDONLY, 0, sub {	77	aio_open "/etc/passwd", IO::AIO::O_RDONLY, 0, sub {
102	my $fh = shift	78	my $fh = shift
103	or die "error while opening: $!";	79	or die "error while opening: $!";
104		80
105	# stat'ing filehandles is generally non-blocking	81	# stat'ing filehandles is generally non-blocking
106	my $size = -s $fh;	82	my $size = -s $fh;
…		…
115		91
116	# file contents now in $contents	92	# file contents now in $contents
117	print $contents;	93	print $contents;
118		94
119	# exit event loop and program	95	# exit event loop and program
120	Event::unloop;	96	EV::unloop;
121	};	97	};
122	};	98	};
123		99
124	# possibly queue up other requests, or open GUI windows,	100	# possibly queue up other requests, or open GUI windows,
125	# check for sockets etc. etc.	101	# check for sockets etc. etc.
126		102
127	# process events as long as there are some:	103	# process events as long as there are some:
128	Event::loop;	104	EV::loop;
129		105
130	REQUEST ANATOMY AND LIFETIME	106	REQUEST ANATOMY AND LIFETIME
131	Every "aio_*" function creates a request. which is a C data structure	107	Every "aio_*" function creates a request. which is a C data structure
132	not directly visible to Perl.	108	not directly visible to Perl.
133		109
…		…
169	anymore (except possibly for the Perl object, but its connection to	145	anymore (except possibly for the Perl object, but its connection to
170	the actual aio request is severed and calling its methods will	146	the actual aio request is severed and calling its methods will
171	either do nothing or result in a runtime error).	147	either do nothing or result in a runtime error).
172		148
173	FUNCTIONS	149	FUNCTIONS
		150	QUICK OVERVIEW
		151	This section simply lists the prototypes of the most important functions
		152	for quick reference. See the following sections for function-by-function
		153	documentation.
		154
		155	aio_open $pathname, $flags, $mode, $callback->($fh)
		156	aio_close $fh, $callback->($status)
		157	aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
		158	aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
		159	aio_sendfile $out_fh, $in_fh, $in_offset, $length, $callback->($retval)
		160	aio_readahead $fh,$offset,$length, $callback->($retval)
		161	aio_stat $fh_or_path, $callback->($status)
		162	aio_lstat $fh, $callback->($status)
		163	aio_statvfs $fh_or_path, $callback->($statvfs)
		164	aio_utime $fh_or_path, $atime, $mtime, $callback->($status)
		165	aio_chown $fh_or_path, $uid, $gid, $callback->($status)
		166	aio_truncate $fh_or_path, $offset, $callback->($status)
		167	aio_chmod $fh_or_path, $mode, $callback->($status)
		168	aio_unlink $pathname, $callback->($status)
		169	aio_mknod $path, $mode, $dev, $callback->($status)
		170	aio_link $srcpath, $dstpath, $callback->($status)
		171	aio_symlink $srcpath, $dstpath, $callback->($status)
		172	aio_readlink $path, $callback->($link)
		173	aio_rename $srcpath, $dstpath, $callback->($status)
		174	aio_mkdir $pathname, $mode, $callback->($status)
		175	aio_rmdir $pathname, $callback->($status)
		176	aio_readdir $pathname, $callback->($entries)
		177	aio_readdirx $pathname, $flags, $callback->($entries, $flags)
		178	IO::AIO::READDIR_DENTS IO::AIO::READDIR_DIRS_FIRST
		179	IO::AIO::READDIR_STAT_ORDER IO::AIO::READDIR_FOUND_UNKNOWN
		180	aio_load $path, $data, $callback->($status)
		181	aio_copy $srcpath, $dstpath, $callback->($status)
		182	aio_move $srcpath, $dstpath, $callback->($status)
		183	aio_scandir $path, $maxreq, $callback->($dirs, $nondirs)
		184	aio_rmtree $path, $callback->($status)
		185	aio_sync $callback->($status)
		186	aio_fsync $fh, $callback->($status)
		187	aio_fdatasync $fh, $callback->($status)
		188	aio_sync_file_range $fh, $offset, $nbytes, $flags, $callback->($status)
		189	aio_pathsync $path, $callback->($status)
		190	aio_msync $scalar, $offset = 0, $length = undef, flags = 0, $callback->($status)
		191	aio_mtouch $scalar, $offset = 0, $length = undef, flags = 0, $callback->($status)
		192	aio_mlock $scalar, $offset = 0, $length = undef, $callback->($status)
		193	aio_mlockall $flags, $callback->($status)
		194	aio_group $callback->(...)
		195	aio_nop $callback->()
		196
		197	$prev_pri = aioreq_pri [$pri]
		198	aioreq_nice $pri_adjust
		199
		200	IO::AIO::poll_wait
		201	IO::AIO::poll_cb
		202	IO::AIO::poll
		203	IO::AIO::flush
		204	IO::AIO::max_poll_reqs $nreqs
		205	IO::AIO::max_poll_time $seconds
		206	IO::AIO::min_parallel $nthreads
		207	IO::AIO::max_parallel $nthreads
		208	IO::AIO::max_idle $nthreads
		209	IO::AIO::idle_timeout $seconds
		210	IO::AIO::max_outstanding $maxreqs
		211	IO::AIO::nreqs
		212	IO::AIO::nready
		213	IO::AIO::npending
		214
		215	IO::AIO::sendfile $ofh, $ifh, $offset, $count
		216	IO::AIO::fadvise $fh, $offset, $len, $advice
		217	IO::AIO::madvise $scalar, $offset, $length, $advice
		218	IO::AIO::mprotect $scalar, $offset, $length, $protect
		219	IO::AIO::munlock $scalar, $offset = 0, $length = undef
		220	IO::AIO::munlockall
		221
174	AIO REQUEST FUNCTIONS	222	AIO REQUEST FUNCTIONS
175	All the "aio_*" calls are more or less thin wrappers around the syscall	223	All the "aio_*" calls are more or less thin wrappers around the syscall
176	with the same name (sans "aio_"). The arguments are similar or	224	with the same name (sans "aio_"). The arguments are similar or
177	identical, and they all accept an additional (and optional) $callback	225	identical, and they all accept an additional (and optional) $callback
178	argument which must be a code reference. This code reference will get	226	argument which must be a code reference. This code reference will get
…		…
249	will be modified by the umask in effect then the request is being	297	will be modified by the umask in effect then the request is being
250	executed, so better never change the umask.	298	executed, so better never change the umask.
251		299
252	Example:	300	Example:
253		301
254	aio_open "/etc/passwd", O_RDONLY, 0, sub {	302	aio_open "/etc/passwd", IO::AIO::O_RDONLY, 0, sub {
255	if ($_[0]) {	303	if ($_[0]) {
256	print "open successful, fh is $_[0]\n";	304	print "open successful, fh is $_[0]\n";
257	...	305	...
258	} else {	306	} else {
259	die "open failed: $!\n";	307	die "open failed: $!\n";
260	}	308	}
261	};	309	};
262		310
		311	In addition to all the common open modes/flags ("O_RDONLY",
		312	"O_WRONLY", "O_RDWR", "O_CREAT", "O_TRUNC", "O_EXCL" and
		313	"O_APPEND"), the following POSIX and non-POSIX constants are
		314	available (missing ones on your system are, as usual, 0):
		315
		316	"O_ASYNC", "O_DIRECT", "O_NOATIME", "O_CLOEXEC", "O_NOCTTY",
		317	"O_NOFOLLOW", "O_NONBLOCK", "O_EXEC", "O_SEARCH", "O_DIRECTORY",
		318	"O_DSYNC", "O_RSYNC", "O_SYNC" and "O_TTY_INIT".
		319
263	aio_close $fh, $callback->($status)	320	aio_close $fh, $callback->($status)
264	Asynchronously close a file and call the callback with the result	321	Asynchronously close a file and call the callback with the result
265	code.	322	code.
266		323
267	Unfortunately, you can't do this to perl. Perl insists very	324	Unfortunately, you can't do this to perl. Perl insists very
…		…
275	Or in other words: the file descriptor will be closed, but it will	332	Or in other words: the file descriptor will be closed, but it will
276	not be free for reuse until the perl filehandle is closed.	333	not be free for reuse until the perl filehandle is closed.
277		334
278	aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval)	335	aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
279	aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval)	336	aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
280	Reads or writes $length bytes from the specified $fh and $offset	337	Reads or writes $length bytes from or to the specified $fh and
281	into the scalar given by $data and offset $dataoffset and calls the	338	$offset into the scalar given by $data and offset $dataoffset and
282	callback without the actual number of bytes read (or -1 on error,	339	calls the callback without the actual number of bytes read (or -1 on
283	just like the syscall).	340	error, just like the syscall).
		341
		342	"aio_read" will, like "sysread", shrink or grow the $data scalar to
		343	offset plus the actual number of bytes read.
284		344
285	If $offset is undefined, then the current file descriptor offset	345	If $offset is undefined, then the current file descriptor offset
286	will be used (and updated), otherwise the file descriptor offset	346	will be used (and updated), otherwise the file descriptor offset
287	will not be changed by these calls.	347	will not be changed by these calls.
288		348
…		…
309	reading at byte offset $in_offset, and starts writing at the current	369	reading at byte offset $in_offset, and starts writing at the current
310	file offset of $out_fh. Because of that, it is not safe to issue	370	file offset of $out_fh. Because of that, it is not safe to issue
311	more than one "aio_sendfile" per $out_fh, as they will interfere	371	more than one "aio_sendfile" per $out_fh, as they will interfere
312	with each other.	372	with each other.
313		373
		374	Please note that "aio_sendfile" can read more bytes from $in_fh than
		375	are written, and there is no way to find out how many bytes have
		376	been read from "aio_sendfile" alone, as "aio_sendfile" only provides
		377	the number of bytes written to $out_fh. Only if the result value
		378	equals $length one can assume that $length bytes have been read.
		379
		380	Unlike with other "aio_" functions, it makes a lot of sense to use
		381	"aio_sendfile" on non-blocking sockets, as long as one end
		382	(typically the $in_fh) is a file - the file I/O will then be
		383	asynchronous, while the socket I/O will be non-blocking. Note,
		384	however, that you can run into a trap where "aio_sendfile" reads
		385	some data with readahead, then fails to write all data, and when the
		386	socket is ready the next time, the data in the cache is already
		387	lost, forcing "aio_sendfile" to again hit the disk. Explicit
		388	"aio_read" + "aio_write" let's you control resource usage much
		389	better.
		390
314	This call tries to make use of a native "sendfile" syscall to	391	This call tries to make use of a native "sendfile" syscall to
315	provide zero-copy operation. For this to work, $out_fh should refer	392	provide zero-copy operation. For this to work, $out_fh should refer
316	to a socket, and $in_fh should refer to mmap'able file.	393	to a socket, and $in_fh should refer to an mmap'able file.
317		394
318	If the native sendfile call fails or is not implemented, it will be	395	If a native sendfile cannot be found or it fails with "ENOSYS",
		396	"ENOTSUP", "EOPNOTSUPP", "EAFNOSUPPORT", "EPROTOTYPE" or "ENOTSOCK",
319	emulated, so you can call "aio_sendfile" on any type of filehandle	397	it will be emulated, so you can call "aio_sendfile" on any type of
320	regardless of the limitations of the operating system.	398	filehandle regardless of the limitations of the operating system.
321
322	Please note, however, that "aio_sendfile" can read more bytes from
323	$in_fh than are written, and there is no way to find out how many
324	bytes have been read from "aio_sendfile" alone, as "aio_sendfile"
325	only provides the number of bytes written to $out_fh. Only if the
326	result value equals $length one can assume that $length bytes have
327	been read.
328		399
329	aio_readahead $fh,$offset,$length, $callback->($retval)	400	aio_readahead $fh,$offset,$length, $callback->($retval)
330	"aio_readahead" populates the page cache with data from a file so	401	"aio_readahead" populates the page cache with data from a file so
331	that subsequent reads from that file will not block on disk I/O. The	402	that subsequent reads from that file will not block on disk I/O. The
332	$offset argument specifies the starting point from which data is to	403	$offset argument specifies the starting point from which data is to
…		…
353	Currently, the stats are always 64-bit-stats, i.e. instead of	424	Currently, the stats are always 64-bit-stats, i.e. instead of
354	returning an error when stat'ing a large file, the results will be	425	returning an error when stat'ing a large file, the results will be
355	silently truncated unless perl itself is compiled with large file	426	silently truncated unless perl itself is compiled with large file
356	support.	427	support.
357		428
		429	To help interpret the mode and dev/rdev stat values, IO::AIO offers
		430	the following constants and functions (if not implemented, the
		431	constants will be 0 and the functions will either "croak" or fall
		432	back on traditional behaviour).
		433
		434	"S_IFMT", "S_IFIFO", "S_IFCHR", "S_IFBLK", "S_IFLNK", "S_IFREG",
		435	"S_IFDIR", "S_IFWHT", "S_IFSOCK", "IO::AIO::major $dev_t",
		436	"IO::AIO::minor $dev_t", "IO::AIO::makedev $major, $minor".
		437
358	Example: Print the length of /etc/passwd:	438	Example: Print the length of /etc/passwd:
359		439
360	aio_stat "/etc/passwd", sub {	440	aio_stat "/etc/passwd", sub {
361	$_[0] and die "stat failed: $!";	441	$_[0] and die "stat failed: $!";
362	print "size is ", -s _, "\n";	442	print "size is ", -s _, "\n";
363	};	443	};
364		444
		445	aio_statvfs $fh_or_path, $callback->($statvfs)
		446	Works like the POSIX "statvfs" or "fstatvfs" syscalls, depending on
		447	whether a file handle or path was passed.
		448
		449	On success, the callback is passed a hash reference with the
		450	following members: "bsize", "frsize", "blocks", "bfree", "bavail",
		451	"files", "ffree", "favail", "fsid", "flag" and "namemax". On
		452	failure, "undef" is passed.
		453
		454	The following POSIX IO::AIO::ST_* constants are defined: "ST_RDONLY"
		455	and "ST_NOSUID".
		456
		457	The following non-POSIX IO::AIO::ST_* flag masks are defined to
		458	their correct value when available, or to 0 on systems that do not
		459	support them: "ST_NODEV", "ST_NOEXEC", "ST_SYNCHRONOUS",
		460	"ST_MANDLOCK", "ST_WRITE", "ST_APPEND", "ST_IMMUTABLE",
		461	"ST_NOATIME", "ST_NODIRATIME" and "ST_RELATIME".
		462
		463	Example: stat "/wd" and dump out the data if successful.
		464
		465	aio_statvfs "/wd", sub {
		466	my $f = $_[0]
		467	or die "statvfs: $!";
		468
		469	use Data::Dumper;
		470	say Dumper $f;
		471	};
		472
		473	# result:
		474	{
		475	bsize => 1024,
		476	bfree => 4333064312,
		477	blocks => 10253828096,
		478	files => 2050765568,
		479	flag => 4096,
		480	favail => 2042092649,
		481	bavail => 4333064312,
		482	ffree => 2042092649,
		483	namemax => 255,
		484	frsize => 1024,
		485	fsid => 1810
		486	}
		487
365	aio_utime $fh_or_path, $atime, $mtime, $callback->($status)	488	aio_utime $fh_or_path, $atime, $mtime, $callback->($status)
366	Works like perl's "utime" function (including the special case of	489	Works like perl's "utime" function (including the special case of
367	$atime and $mtime being undef). Fractional times are supported if	490	$atime and $mtime being undef). Fractional times are supported if
368	the underlying syscalls support them.	491	the underlying syscalls support them.
369		492
…		…
407		530
408	The only (POSIX-) portable way of calling this function is:	531	The only (POSIX-) portable way of calling this function is:
409		532
410	aio_mknod $path, IO::AIO::S_IFIFO \| $mode, 0, sub { ...	533	aio_mknod $path, IO::AIO::S_IFIFO \| $mode, 0, sub { ...
411		534
		535	See "aio_stat" for info about some potentially helpful extra
		536	constants and functions.
		537
412	aio_link $srcpath, $dstpath, $callback->($status)	538	aio_link $srcpath, $dstpath, $callback->($status)
413	Asynchronously create a new link to the existing object at $srcpath	539	Asynchronously create a new link to the existing object at $srcpath
414	at the path $dstpath and call the callback with the result code.	540	at the path $dstpath and call the callback with the result code.
415		541
416	aio_symlink $srcpath, $dstpath, $callback->($status)	542	aio_symlink $srcpath, $dstpath, $callback->($status)
…		…
439	aio_readdir $pathname, $callback->($entries)	565	aio_readdir $pathname, $callback->($entries)
440	Unlike the POSIX call of the same name, "aio_readdir" reads an	566	Unlike the POSIX call of the same name, "aio_readdir" reads an
441	entire directory (i.e. opendir + readdir + closedir). The entries	567	entire directory (i.e. opendir + readdir + closedir). The entries
442	will not be sorted, and will NOT include the "." and ".." entries.	568	will not be sorted, and will NOT include the "." and ".." entries.
443		569
444	The callback a single argument which is either "undef" or an	570	The callback is passed a single argument which is either "undef" or
445	array-ref with the filenames.	571	an array-ref with the filenames.
		572
		573	aio_readdirx $pathname, $flags, $callback->($entries, $flags)
		574	Quite similar to "aio_readdir", but the $flags argument allows to
		575	tune behaviour and output format. In case of an error, $entries will
		576	be "undef".
		577
		578	The flags are a combination of the following constants, ORed
		579	together (the flags will also be passed to the callback, possibly
		580	modified):
		581
		582	IO::AIO::READDIR_DENTS
		583	When this flag is off, then the callback gets an arrayref
		584	consisting of names only (as with "aio_readdir"), otherwise it
		585	gets an arrayref with "[$name, $type, $inode]" arrayrefs, each
		586	describing a single directory entry in more detail.
		587
		588	$name is the name of the entry.
		589
		590	$type is one of the "IO::AIO::DT_xxx" constants:
		591
		592	"IO::AIO::DT_UNKNOWN", "IO::AIO::DT_FIFO", "IO::AIO::DT_CHR",
		593	"IO::AIO::DT_DIR", "IO::AIO::DT_BLK", "IO::AIO::DT_REG",
		594	"IO::AIO::DT_LNK", "IO::AIO::DT_SOCK", "IO::AIO::DT_WHT".
		595
		596	"IO::AIO::DT_UNKNOWN" means just that: readdir does not know. If
		597	you need to know, you have to run stat yourself. Also, for speed
		598	reasons, the $type scalars are read-only: you can not modify
		599	them.
		600
		601	$inode is the inode number (which might not be exact on systems
		602	with 64 bit inode numbers and 32 bit perls). This field has
		603	unspecified content on systems that do not deliver the inode
		604	information.
		605
		606	IO::AIO::READDIR_DIRS_FIRST
		607	When this flag is set, then the names will be returned in an
		608	order where likely directories come first, in optimal stat
		609	order. This is useful when you need to quickly find directories,
		610	or you want to find all directories while avoiding to stat()
		611	each entry.
		612
		613	If the system returns type information in readdir, then this is
		614	used to find directories directly. Otherwise, likely directories
		615	are names beginning with ".", or otherwise names with no dots,
		616	of which names with short names are tried first.
		617
		618	IO::AIO::READDIR_STAT_ORDER
		619	When this flag is set, then the names will be returned in an
		620	order suitable for stat()'ing each one. That is, when you plan
		621	to stat() all files in the given directory, then the returned
		622	order will likely be fastest.
		623
		624	If both this flag and "IO::AIO::READDIR_DIRS_FIRST" are
		625	specified, then the likely dirs come first, resulting in a less
		626	optimal stat order.
		627
		628	IO::AIO::READDIR_FOUND_UNKNOWN
		629	This flag should not be set when calling "aio_readdirx".
		630	Instead, it is being set by "aio_readdirx", when any of the
		631	$type's found were "IO::AIO::DT_UNKNOWN". The absense of this
		632	flag therefore indicates that all $type's are known, which can
		633	be used to speed up some algorithms.
446		634
447	aio_load $path, $data, $callback->($status)	635	aio_load $path, $data, $callback->($status)
448	This is a composite request that tries to fully load the given file	636	This is a composite request that tries to fully load the given file
449	into memory. Status is the same as with aio_read.	637	into memory. Status is the same as with aio_read.
450		638
451	aio_copy $srcpath, $dstpath, $callback->($status)	639	aio_copy $srcpath, $dstpath, $callback->($status)
452	Try to copy the file (directories not supported as either source	640	Try to copy the file (directories not supported as either source
453	or destination) from $srcpath to $dstpath and call the callback with	641	or destination) from $srcpath to $dstpath and call the callback with
454	the 0 (error) or -1 ok.	642	a status of 0 (ok) or -1 (error, see $!).
455		643
456	This is a composite request that creates the destination file with	644	This is a composite request that creates the destination file with
457	mode 0200 and copies the contents of the source file into it using	645	mode 0200 and copies the contents of the source file into it using
458	"aio_sendfile", followed by restoring atime, mtime, access mode and	646	"aio_sendfile", followed by restoring atime, mtime, access mode and
459	uid/gid, in that order.	647	uid/gid, in that order.
…		…
463	uid/gid, where errors are being ignored.	651	uid/gid, where errors are being ignored.
464		652
465	aio_move $srcpath, $dstpath, $callback->($status)	653	aio_move $srcpath, $dstpath, $callback->($status)
466	Try to move the file (directories not supported as either source	654	Try to move the file (directories not supported as either source
467	or destination) from $srcpath to $dstpath and call the callback with	655	or destination) from $srcpath to $dstpath and call the callback with
468	the 0 (error) or -1 ok.	656	a status of 0 (ok) or -1 (error, see $!).
469		657
470	This is a composite request that tries to rename(2) the file first;	658	This is a composite request that tries to rename(2) the file first;
471	if rename fails with "EXDEV", it copies the file with "aio_copy"	659	if rename fails with "EXDEV", it copies the file with "aio_copy"
472	and, if that is successful, unlinks the $srcpath.	660	and, if that is successful, unlinks the $srcpath.
473		661
…		…
497	Implementation notes.	685	Implementation notes.
498		686
499	The "aio_readdir" cannot be avoided, but "stat()"'ing every entry	687	The "aio_readdir" cannot be avoided, but "stat()"'ing every entry
500	can.	688	can.
501		689
		690	If readdir returns file type information, then this is used directly
		691	to find directories.
		692
502	After reading the directory, the modification time, size etc. of the	693	Otherwise, after reading the directory, the modification time, size
503	directory before and after the readdir is checked, and if they match	694	etc. of the directory before and after the readdir is checked, and
504	(and isn't the current time), the link count will be used to decide	695	if they match (and isn't the current time), the link count will be
505	how many entries are directories (if >= 2). Otherwise, no knowledge	696	used to decide how many entries are directories (if >= 2).
506	of the number of subdirectories will be assumed.	697	Otherwise, no knowledge of the number of subdirectories will be
		698	assumed.
507		699
508	Then entries will be sorted into likely directories (everything	700	Then entries will be sorted into likely directories a non-initial
509	without a non-initial dot currently) and likely non-directories	701	dot currently) and likely non-directories (see "aio_readdirx"). Then
510	(everything else). Then every entry plus an appended "/." will be	702	every entry plus an appended "/." will be "stat"'ed, likely
511	"stat"'ed, likely directories first. If that succeeds, it assumes	703	directories first, in order of their inode numbers. If that
512	that the entry is a directory or a symlink to directory (which will	704	succeeds, it assumes that the entry is a directory or a symlink to
513	be checked seperately). This is often faster than stat'ing the entry	705	directory (which will be checked seperately). This is often faster
514	itself because filesystems might detect the type of the entry	706	than stat'ing the entry itself because filesystems might detect the
515	without reading the inode data (e.g. ext2fs filetype feature).	707	type of the entry without reading the inode data (e.g. ext2fs
		708	filetype feature), even on systems that cannot return the filetype
		709	information on readdir.
516		710
517	If the known number of directories (link count - 2) has been	711	If the known number of directories (link count - 2) has been
518	reached, the rest of the entries is assumed to be non-directories.	712	reached, the rest of the entries is assumed to be non-directories.
519		713
520	This only works with certainty on POSIX (= UNIX) filesystems, which	714	This only works with certainty on POSIX (= UNIX) filesystems, which
…		…
562	operations (E.g. rename). This might not work on all operating	756	operations (E.g. rename). This might not work on all operating
563	systems or have any specific effect, but usually it makes sure that	757	systems or have any specific effect, but usually it makes sure that
564	directory changes get written to disc. It works for anything that	758	directory changes get written to disc. It works for anything that
565	can be opened for read-only, not just directories.	759	can be opened for read-only, not just directories.
566		760
		761	Future versions of this function might fall back to other methods
		762	when "fsync" on the directory fails (such as calling "sync").
		763
567	Passes 0 when everything went ok, and -1 on error.	764	Passes 0 when everything went ok, and -1 on error.
		765
		766	aio_msync $scalar, $offset = 0, $length = undef, flags = 0,
		767	$callback->($status)
		768	This is a rather advanced IO::AIO call, which only works on
		769	mmap(2)ed scalars (see the "IO::AIO::mmap" function, although it
		770	also works on data scalars managed by the Sys::Mmap or Mmap modules,
		771	note that the scalar must only be modified in-place while an aio
		772	operation is pending on it).
		773
		774	It calls the "msync" function of your OS, if available, with the
		775	memory area starting at $offset in the string and ending $length
		776	bytes later. If $length is negative, counts from the end, and if
		777	$length is "undef", then it goes till the end of the string. The
		778	flags can be a combination of "IO::AIO::MS_ASYNC",
		779	"IO::AIO::MS_INVALIDATE" and "IO::AIO::MS_SYNC".
		780
		781	aio_mtouch $scalar, $offset = 0, $length = undef, flags = 0,
		782	$callback->($status)
		783	This is a rather advanced IO::AIO call, which works best on
		784	mmap(2)ed scalars.
		785
		786	It touches (reads or writes) all memory pages in the specified range
		787	inside the scalar. All caveats and parameters are the same as for
		788	"aio_msync", above, except for flags, which must be either 0 (which
		789	reads all pages and ensures they are instantiated) or
		790	"IO::AIO::MT_MODIFY", which modifies the memory page s(by reading
		791	and writing an octet from it, which dirties the page).
		792
		793	aio_mlock $scalar, $offset = 0, $length = undef, $callback->($status)
		794	This is a rather advanced IO::AIO call, which works best on
		795	mmap(2)ed scalars.
		796
		797	It reads in all the pages of the underlying storage into memory (if
		798	any) and locks them, so they are not getting swapped/paged out or
		799	removed.
		800
		801	If $length is undefined, then the scalar will be locked till the
		802	end.
		803
		804	On systems that do not implement "mlock", this function returns -1
		805	and sets errno to "ENOSYS".
		806
		807	Note that the corresponding "munlock" is synchronous and is
		808	documented under "MISCELLANEOUS FUNCTIONS".
		809
		810	Example: open a file, mmap and mlock it - both will be undone when
		811	$data gets destroyed.
		812
		813	open my $fh, "<", $path or die "$path: $!";
		814	my $data;
		815	IO::AIO::mmap $data, -s $fh, IO::AIO::PROT_READ, IO::AIO::MAP_SHARED, $fh;
		816	aio_mlock $data; # mlock in background
		817
		818	aio_mlockall $flags, $callback->($status)
		819	Calls the "mlockall" function with the given $flags (a combination
		820	of "IO::AIO::MCL_CURRENT" and "IO::AIO::MCL_FUTURE").
		821
		822	On systems that do not implement "mlockall", this function returns
		823	-1 and sets errno to "ENOSYS".
		824
		825	Note that the corresponding "munlockall" is synchronous and is
		826	documented under "MISCELLANEOUS FUNCTIONS".
		827
		828	Example: asynchronously lock all current and future pages into
		829	memory.
		830
		831	aio_mlockall IO::AIO::MCL_FUTURE;
568		832
569	aio_group $callback->(...)	833	aio_group $callback->(...)
570	This is a very special aio request: Instead of doing something, it	834	This is a very special aio request: Instead of doing something, it
571	is a container for other aio requests, which is useful if you want	835	is a container for other aio requests, which is useful if you want
572	to bundle many requests into a single, composite, request with a	836	to bundle many requests into a single, composite, request with a
…		…
615		879
616	cancel $req	880	cancel $req
617	Cancels the request, if possible. Has the effect of skipping	881	Cancels the request, if possible. Has the effect of skipping
618	execution when entering the execute state and skipping calling the	882	execution when entering the execute state and skipping calling the
619	callback when entering the the result state, but will leave the	883	callback when entering the the result state, but will leave the
620	request otherwise untouched. That means that requests that currently	884	request otherwise untouched (with the exception of readdir). That
621	execute will not be stopped and resources held by the request will	885	means that requests that currently execute will not be stopped and
622	not be freed prematurely.	886	resources held by the request will not be freed prematurely.
623		887
624	cb $req $callback->(...)	888	cb $req $callback->(...)
625	Replace (or simply set) the callback registered to the request.	889	Replace (or simply set) the callback registered to the request.
626		890
627	IO::AIO::GRP CLASS	891	IO::AIO::GRP CLASS
…		…
688		952
689	$grp->cancel_subs	953	$grp->cancel_subs
690	Cancel all subrequests and clears any feeder, but not the group	954	Cancel all subrequests and clears any feeder, but not the group
691	request itself. Useful when you queued a lot of events but got a	955	request itself. Useful when you queued a lot of events but got a
692	result early.	956	result early.
		957
		958	The group request will finish normally (you cannot add requests to
		959	the group).
693		960
694	$grp->result (...)	961	$grp->result (...)
695	Set the result value(s) that will be passed to the group callback	962	Set the result value(s) that will be passed to the group callback
696	when all subrequests have finished and set the groups errno to the	963	when all subrequests have finished and set the groups errno to the
697	current value of errno (just like calling "errno" without an error	964	current value of errno (just like calling "errno" without an error
…		…
757	SUPPORT FUNCTIONS	1024	SUPPORT FUNCTIONS
758	EVENT PROCESSING AND EVENT LOOP INTEGRATION	1025	EVENT PROCESSING AND EVENT LOOP INTEGRATION
759	$fileno = IO::AIO::poll_fileno	1026	$fileno = IO::AIO::poll_fileno
760	Return the request result pipe file descriptor. This filehandle	1027	Return the request result pipe file descriptor. This filehandle
761	must be polled for reading by some mechanism outside this module	1028	must be polled for reading by some mechanism outside this module
762	(e.g. Event or select, see below or the SYNOPSIS). If the pipe	1029	(e.g. EV, Glib, select and so on, see below or the SYNOPSIS). If the
763	becomes readable you have to call "poll_cb" to check the results.	1030	pipe becomes readable you have to call "poll_cb" to check the
		1031	results.
764		1032
765	See "poll_cb" for an example.	1033	See "poll_cb" for an example.
766		1034
767	IO::AIO::poll_cb	1035	IO::AIO::poll_cb
768	Process some outstanding events on the result pipe. You have to call	1036	Process some outstanding events on the result pipe. You have to call
769	this regularly. Returns 0 if all events could be processed, or -1 if	1037	this regularly. Returns 0 if all events could be processed (or there
770	it returned earlier for whatever reason. Returns immediately when no	1038	were no events to process), or -1 if it returned earlier for
771	events are outstanding. The amount of events processed depends on	1039	whatever reason. Returns immediately when no events are outstanding.
772	the settings of "IO::AIO::max_poll_req" and	1040	The amount of events processed depends on the settings of
773	"IO::AIO::max_poll_time".	1041	"IO::AIO::max_poll_req" and "IO::AIO::max_poll_time".
774		1042
775	If not all requests were processed for whatever reason, the	1043	If not all requests were processed for whatever reason, the
776	filehandle will still be ready when "poll_cb" returns, so normally	1044	filehandle will still be ready when "poll_cb" returns, so normally
777	you don't have to do anything special to have it called later.	1045	you don't have to do anything special to have it called later.
778		1046
		1047	Apart from calling "IO::AIO::poll_cb" when the event filehandle
		1048	becomes ready, it can be beneficial to call this function from loops
		1049	which submit a lot of requests, to make sure the results get
		1050	processed when they become available and not just when the loop is
		1051	finished and the event loop takes over again. This function returns
		1052	very fast when there are no outstanding requests.
		1053
779	Example: Install an Event watcher that automatically calls	1054	Example: Install an Event watcher that automatically calls
780	IO::AIO::poll_cb with high priority:	1055	IO::AIO::poll_cb with high priority (more examples can be found in
		1056	the SYNOPSIS section, at the top of this document):
781		1057
782	Event->io (fd => IO::AIO::poll_fileno,	1058	Event->io (fd => IO::AIO::poll_fileno,
783	poll => 'r', async => 1,	1059	poll => 'r', async => 1,
784	cb => \&IO::AIO::poll_cb);	1060	cb => \&IO::AIO::poll_cb);
		1061
		1062	IO::AIO::poll_wait
		1063	If there are any outstanding requests and none of them in the result
		1064	phase, wait till the result filehandle becomes ready for reading
		1065	(simply does a "select" on the filehandle. This is useful if you
		1066	want to synchronously wait for some requests to finish).
		1067
		1068	See "nreqs" for an example.
		1069
		1070	IO::AIO::poll
		1071	Waits until some requests have been handled.
		1072
		1073	Returns the number of requests processed, but is otherwise strictly
		1074	equivalent to:
		1075
		1076	IO::AIO::poll_wait, IO::AIO::poll_cb
		1077
		1078	IO::AIO::flush
		1079	Wait till all outstanding AIO requests have been handled.
		1080
		1081	Strictly equivalent to:
		1082
		1083	IO::AIO::poll_wait, IO::AIO::poll_cb
		1084	while IO::AIO::nreqs;
785		1085
786	IO::AIO::max_poll_reqs $nreqs	1086	IO::AIO::max_poll_reqs $nreqs
787	IO::AIO::max_poll_time $seconds	1087	IO::AIO::max_poll_time $seconds
788	These set the maximum number of requests (default 0, meaning	1088	These set the maximum number of requests (default 0, meaning
789	infinity) that are being processed by "IO::AIO::poll_cb" in one	1089	infinity) that are being processed by "IO::AIO::poll_cb" in one
…		…
813	# use a low priority so other tasks have priority	1113	# use a low priority so other tasks have priority
814	Event->io (fd => IO::AIO::poll_fileno,	1114	Event->io (fd => IO::AIO::poll_fileno,
815	poll => 'r', nice => 1,	1115	poll => 'r', nice => 1,
816	cb => &IO::AIO::poll_cb);	1116	cb => &IO::AIO::poll_cb);
817		1117
818	IO::AIO::poll_wait
819	If there are any outstanding requests and none of them in the result
820	phase, wait till the result filehandle becomes ready for reading
821	(simply does a "select" on the filehandle. This is useful if you
822	want to synchronously wait for some requests to finish).
823
824	See "nreqs" for an example.
825
826	IO::AIO::poll
827	Waits until some requests have been handled.
828
829	Returns the number of requests processed, but is otherwise strictly
830	equivalent to:
831
832	IO::AIO::poll_wait, IO::AIO::poll_cb
833
834	IO::AIO::flush
835	Wait till all outstanding AIO requests have been handled.
836
837	Strictly equivalent to:
838
839	IO::AIO::poll_wait, IO::AIO::poll_cb
840	while IO::AIO::nreqs;
841
842	CONTROLLING THE NUMBER OF THREADS	1118	CONTROLLING THE NUMBER OF THREADS
843	IO::AIO::min_parallel $nthreads	1119	IO::AIO::min_parallel $nthreads
844	Set the minimum number of AIO threads to $nthreads. The current	1120	Set the minimum number of AIO threads to $nthreads. The current
845	default is 8, which means eight asynchronous operations can execute	1121	default is 8, which means eight asynchronous operations can execute
846	concurrently at any one time (the number of outstanding requests,	1122	concurrently at any one time (the number of outstanding requests,
…		…
875		1151
876	Under normal circumstances you don't need to call this function.	1152	Under normal circumstances you don't need to call this function.
877		1153
878	IO::AIO::max_idle $nthreads	1154	IO::AIO::max_idle $nthreads
879	Limit the number of threads (default: 4) that are allowed to idle	1155	Limit the number of threads (default: 4) that are allowed to idle
880	(i.e., threads that did not get a request to process within 10	1156	(i.e., threads that did not get a request to process within the idle
881	seconds). That means if a thread becomes idle while $nthreads other	1157	timeout (default: 10 seconds). That means if a thread becomes idle
882	threads are also idle, it will free its resources and exit.	1158	while $nthreads other threads are also idle, it will free its
		1159	resources and exit.
883		1160
884	This is useful when you allow a large number of threads (e.g. 100 or	1161	This is useful when you allow a large number of threads (e.g. 100 or
885	1000) to allow for extremely high load situations, but want to free	1162	1000) to allow for extremely high load situations, but want to free
886	resources under normal circumstances (1000 threads can easily	1163	resources under normal circumstances (1000 threads can easily
887	consume 30MB of RAM).	1164	consume 30MB of RAM).
888		1165
889	The default is probably ok in most situations, especially if thread	1166	The default is probably ok in most situations, especially if thread
890	creation is fast. If thread creation is very slow on your system you	1167	creation is fast. If thread creation is very slow on your system you
891	might want to use larger values.	1168	might want to use larger values.
		1169
		1170	IO::AIO::idle_timeout $seconds
		1171	Sets the minimum idle timeout (default 10) after which worker
		1172	threads are allowed to exit. SEe "IO::AIO::max_idle".
892		1173
893	IO::AIO::max_outstanding $maxreqs	1174	IO::AIO::max_outstanding $maxreqs
894	This is a very bad function to use in interactive programs because	1175	This is a very bad function to use in interactive programs because
895	it blocks, and a bad way to reduce concurrency because it is	1176	it blocks, and a bad way to reduce concurrency because it is
896	inexact: Better use an "aio_group" together with a feed callback.	1177	inexact: Better use an "aio_group" together with a feed callback.
…		…
924	executed).	1205	executed).
925		1206
926	IO::AIO::npending	1207	IO::AIO::npending
927	Returns the number of requests currently in the pending state	1208	Returns the number of requests currently in the pending state
928	(executed, but not yet processed by poll_cb).	1209	(executed, but not yet processed by poll_cb).
		1210
		1211	MISCELLANEOUS FUNCTIONS
		1212	IO::AIO implements some functions that might be useful, but are not
		1213	asynchronous.
		1214
		1215	IO::AIO::sendfile $ofh, $ifh, $offset, $count
		1216	Calls the "eio_sendfile_sync" function, which is like
		1217	"aio_sendfile", but is blocking (this makes most sense if you know
		1218	the input data is likely cached already and the output filehandle is
		1219	set to non-blocking operations).
		1220
		1221	Returns the number of bytes copied, or -1 on error.
		1222
		1223	IO::AIO::fadvise $fh, $offset, $len, $advice
		1224	Simply calls the "posix_fadvise" function (see its manpage for
		1225	details). The following advice constants are avaiable:
		1226	"IO::AIO::FADV_NORMAL", "IO::AIO::FADV_SEQUENTIAL",
		1227	"IO::AIO::FADV_RANDOM", "IO::AIO::FADV_NOREUSE",
		1228	"IO::AIO::FADV_WILLNEED", "IO::AIO::FADV_DONTNEED".
		1229
		1230	On systems that do not implement "posix_fadvise", this function
		1231	returns ENOSYS, otherwise the return value of "posix_fadvise".
		1232
		1233	IO::AIO::madvise $scalar, $offset, $len, $advice
		1234	Simply calls the "posix_madvise" function (see its manpage for
		1235	details). The following advice constants are avaiable:
		1236	"IO::AIO::MADV_NORMAL", "IO::AIO::MADV_SEQUENTIAL",
		1237	"IO::AIO::MADV_RANDOM", "IO::AIO::MADV_WILLNEED",
		1238	"IO::AIO::MADV_DONTNEED".
		1239
		1240	On systems that do not implement "posix_madvise", this function
		1241	returns ENOSYS, otherwise the return value of "posix_madvise".
		1242
		1243	IO::AIO::mprotect $scalar, $offset, $len, $protect
		1244	Simply calls the "mprotect" function on the preferably AIO::mmap'ed
		1245	$scalar (see its manpage for details). The following protect
		1246	constants are avaiable: "IO::AIO::PROT_NONE", "IO::AIO::PROT_READ",
		1247	"IO::AIO::PROT_WRITE", "IO::AIO::PROT_EXEC".
		1248
		1249	On systems that do not implement "mprotect", this function returns
		1250	ENOSYS, otherwise the return value of "mprotect".
		1251
		1252	IO::AIO::mmap $scalar, $length, $prot, $flags, $fh[, $offset]
		1253	Memory-maps a file (or anonymous memory range) and attaches it to
		1254	the given $scalar, which will act like a string scalar.
		1255
		1256	The only operations allowed on the scalar are "substr"/"vec" that
		1257	don't change the string length, and most read-only operations such
		1258	as copying it or searching it with regexes and so on.
		1259
		1260	Anything else is unsafe and will, at best, result in memory leaks.
		1261
		1262	The memory map associated with the $scalar is automatically removed
		1263	when the $scalar is destroyed, or when the "IO::AIO::mmap" or
		1264	"IO::AIO::munmap" functions are called.
		1265
		1266	This calls the "mmap"(2) function internally. See your system's
		1267	manual page for details on the $length, $prot and $flags parameters.
		1268
		1269	The $length must be larger than zero and smaller than the actual
		1270	filesize.
		1271
		1272	$prot is a combination of "IO::AIO::PROT_NONE",
		1273	"IO::AIO::PROT_EXEC", "IO::AIO::PROT_READ" and/or
		1274	"IO::AIO::PROT_WRITE",
		1275
		1276	$flags can be a combination of "IO::AIO::MAP_SHARED" or
		1277	"IO::AIO::MAP_PRIVATE", or a number of system-specific flags (when
		1278	not available, the are defined as 0): "IO::AIO::MAP_ANONYMOUS"
		1279	(which is set to "MAP_ANON" if your system only provides this
		1280	constant), "IO::AIO::MAP_HUGETLB", "IO::AIO::MAP_LOCKED",
		1281	"IO::AIO::MAP_NORESERVE", "IO::AIO::MAP_POPULATE" or
		1282	"IO::AIO::MAP_NONBLOCK"
		1283
		1284	If $fh is "undef", then a file descriptor of -1 is passed.
		1285
		1286	$offset is the offset from the start of the file - it generally must
		1287	be a multiple of "IO::AIO::PAGESIZE" and defaults to 0.
		1288
		1289	Example:
		1290
		1291	use Digest::MD5;
		1292	use IO::AIO;
		1293
		1294	open my $fh, "<verybigfile"
		1295	or die "$!";
		1296
		1297	IO::AIO::mmap my $data, -s $fh, IO::AIO::PROT_READ, IO::AIO::MAP_SHARED, $fh
		1298	or die "verybigfile: $!";
		1299
		1300	my $fast_md5 = md5 $data;
		1301
		1302	IO::AIO::munmap $scalar
		1303	Removes a previous mmap and undefines the $scalar.
		1304
		1305	IO::AIO::munlock $scalar, $offset = 0, $length = undef
		1306	Calls the "munlock" function, undoing the effects of a previous
		1307	"aio_mlock" call (see its description for details).
		1308
		1309	IO::AIO::munlockall
		1310	Calls the "munlockall" function.
		1311
		1312	On systems that do not implement "munlockall", this function returns
		1313	ENOSYS, otherwise the return value of "munlockall".
		1314
		1315	EVENT LOOP INTEGRATION
		1316	It is recommended to use AnyEvent::AIO to integrate IO::AIO
		1317	automatically into many event loops:
		1318
		1319	# AnyEvent integration (EV, Event, Glib, Tk, POE, urxvt, pureperl...)
		1320	use AnyEvent::AIO;
		1321
		1322	You can also integrate IO::AIO manually into many event loops, here are
		1323	some examples of how to do this:
		1324
		1325	# EV integration
		1326	my $aio_w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb;
		1327
		1328	# Event integration
		1329	Event->io (fd => IO::AIO::poll_fileno,
		1330	poll => 'r',
		1331	cb => \&IO::AIO::poll_cb);
		1332
		1333	# Glib/Gtk2 integration
		1334	add_watch Glib::IO IO::AIO::poll_fileno,
		1335	in => sub { IO::AIO::poll_cb; 1 };
		1336
		1337	# Tk integration
		1338	Tk::Event::IO->fileevent (IO::AIO::poll_fileno, "",
		1339	readable => \&IO::AIO::poll_cb);
		1340
		1341	# Danga::Socket integration
		1342	Danga::Socket->AddOtherFds (IO::AIO::poll_fileno =>
		1343	\&IO::AIO::poll_cb);
929		1344
930	FORK BEHAVIOUR	1345	FORK BEHAVIOUR
931	This module should do "the right thing" when the process using it forks:	1346	This module should do "the right thing" when the process using it forks:
932		1347
933	Before the fork, IO::AIO enters a quiescent state where no requests can	1348	Before the fork, IO::AIO enters a quiescent state where no requests can

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Comparing IO-AIO/README (file contents): Revision 1.34 by root, Thu Nov 20 09:01:40 2008 UTC vs. Revision 1.47 by root, Fri May 27 00:44:49 2011 UTC

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Comparing IO-AIO/README (file contents):
Revision 1.34 by root, Thu Nov 20 09:01:40 2008 UTC vs.
Revision 1.47 by root, Fri May 27 00:44:49 2011 UTC