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

Comparing IO-AIO/AIO.pm (file contents):
Revision 1.21 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.27 by root, Tue Aug 16 22:22:18 2005 UTC

…		…
22	poll => 'r',	22	poll => 'r',
23	cb => \&IO::AIO::poll_cb);	23	cb => \&IO::AIO::poll_cb);
24		24
25	# Glib/Gtk2	25	# Glib/Gtk2
26	add_watch Glib::IO IO::AIO::poll_fileno,	26	add_watch Glib::IO IO::AIO::poll_fileno,
27	in => sub { IO::AIO::poll_cb, 1 };	27	in => sub { IO::AIO::poll_cb; 1 };
28		28
29	# Tk	29	# Tk
30	Tk::Event::IO->fileevent (IO::AIO::poll_fileno, "",	30	Tk::Event::IO->fileevent (IO::AIO::poll_fileno, "",
31	readable => \&IO::AIO::poll_cb);	31	readable => \&IO::AIO::poll_cb);
32		32
…		…
48	not well-supported (Linux doesn't allow them on normal files currently,	48	not well-supported (Linux doesn't allow them on normal files currently,
49	for example), and they would only support aio_read and aio_write, so the	49	for example), and they would only support aio_read and aio_write, so the
50	remaining functionality would have to be implemented using threads anyway.	50	remaining functionality would have to be implemented using threads anyway.
51		51
52	Although the module will work with in the presence of other threads, it is	52	Although the module will work with in the presence of other threads, it is
53	currently not reentrant, so use appropriate locking yourself.	53	currently not reentrant, so use appropriate locking yourself, always call
		54	C<poll_cb> from within the same thread, or never call C<poll_cb> (or other
		55	C<aio_> functions) recursively.
54		56
55	=cut	57	=cut
56		58
57	package IO::AIO;	59	package IO::AIO;
58		60
		61	no warnings;
		62
59	use base 'Exporter';	63	use base 'Exporter';
60		64
61	use Fcntl ();	65	use Fcntl ();
62		66
63	BEGIN {	67	BEGIN {
64	$VERSION = 0.9;	68	$VERSION = 1.1;
65		69
66	@EXPORT = qw(aio_read aio_write aio_open aio_close aio_stat aio_lstat aio_unlink	70	@EXPORT = qw(aio_read aio_write aio_open aio_close aio_stat aio_lstat aio_unlink
67	aio_fsync aio_fdatasync aio_readahead);	71	aio_rmdir aio_symlink aio_fsync aio_fdatasync aio_readahead);
68	@EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs);	72	@EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs);
69		73
70	require XSLoader;	74	require XSLoader;
71	XSLoader::load IO::AIO, $VERSION;	75	XSLoader::load IO::AIO, $VERSION;
72	}	76	}
…		…
81	which must be a code reference. This code reference will get called with	85	which must be a code reference. This code reference will get called with
82	the syscall return code (e.g. most syscalls return C<-1> on error, unlike	86	the syscall return code (e.g. most syscalls return C<-1> on error, unlike
83	perl, which usually delivers "false") as it's sole argument when the given	87	perl, which usually delivers "false") as it's sole argument when the given
84	syscall has been executed asynchronously.	88	syscall has been executed asynchronously.
85		89
86	All functions that expect a filehandle will also accept a file descriptor.	90	All functions expecting a filehandle keep a copy of the filehandle
		91	internally until the request has finished.
87		92
88	The filenames you pass to these routines I<must> be absolute. The reason	93	The filenames you pass to these routines I<must> be absolute. The reason
89	for this is that at the time the request is being executed, the current	94	for this is that at the time the request is being executed, the current
90	working directory could have changed. Alternatively, you can make sure	95	working directory could have changed. Alternatively, you can make sure
91	that you never change the current working directory.	96	that you never change the current working directory.
…		…
147	print "read $_[0] bytes: <$buffer>\n";	152	print "read $_[0] bytes: <$buffer>\n";
148	};	153	};
149		154
150	=item aio_readahead $fh,$offset,$length, $callback	155	=item aio_readahead $fh,$offset,$length, $callback
151		156
152	Asynchronously reads the specified byte range into the page cache, using
153	the C<readahead> syscall. If that syscall doesn't exist (likely if your OS
154	isn't Linux) the status will be C<-1> and C<$!> is set to C<ENOSYS>.
155
156	C<aio_readahead> populates the page cache with data from a file so that	157	C<aio_readahead> populates the page cache with data from a file so that
157	subsequent reads from that file will not block on disk I/O. The C<$offset>	158	subsequent reads from that file will not block on disk I/O. The C<$offset>
158	argument specifies the starting point from which data is to be read and	159	argument specifies the starting point from which data is to be read and
159	C<$length> specifies the number of bytes to be read. I/O is performed in	160	C<$length> specifies the number of bytes to be read. I/O is performed in
160	whole pages, so that offset is effectively rounded down to a page boundary	161	whole pages, so that offset is effectively rounded down to a page boundary
161	and bytes are read up to the next page boundary greater than or equal to	162	and bytes are read up to the next page boundary greater than or equal to
162	(off-set+length). C<aio_readahead> does not read beyond the end of the	163	(off-set+length). C<aio_readahead> does not read beyond the end of the
163	file. The current file offset of the file is left unchanged.	164	file. The current file offset of the file is left unchanged.
164		165
		166	If that syscall doesn't exist (likely if your OS isn't Linux) it will be
		167	emulated by simply reading the data, which would have a similar effect.
		168
165	=item aio_stat $fh_or_path, $callback	169	=item aio_stat $fh_or_path, $callback
166		170
167	=item aio_lstat $fh, $callback	171	=item aio_lstat $fh, $callback
168		172
169	Works like perl's C<stat> or C<lstat> in void context. The callback will	173	Works like perl's C<stat> or C<lstat> in void context. The callback will
…		…
187	=item aio_unlink $pathname, $callback	191	=item aio_unlink $pathname, $callback
188		192
189	Asynchronously unlink (delete) a file and call the callback with the	193	Asynchronously unlink (delete) a file and call the callback with the
190	result code.	194	result code.
191		195
		196	=item aio_rmdir $pathname, $callback
		197
		198	Asynchronously rmdir (delete) a directory and call the callback with the
		199	result code.
		200
192	=item aio_fsync $fh, $callback	201	=item aio_fsync $fh, $callback
193		202
194	Asynchronously call fsync on the given filehandle and call the callback	203	Asynchronously call fsync on the given filehandle and call the callback
195	with the fsync result code.	204	with the fsync result code.
196		205
197	=item aio_fdatasync $fh, $callback	206	=item aio_fdatasync $fh, $callback
198		207
199	Asynchronously call fdatasync on the given filehandle and call the	208	Asynchronously call fdatasync on the given filehandle and call the
200	callback with the fdatasync result code. Might set C<$!> to C<ENOSYS> if	209	callback with the fdatasync result code.
201	C<fdatasync> is not available.	210
		211	If this call isn't available because your OS lacks it or it couldn't be
		212	detected, it will be emulated by calling C<fsync> instead.
202		213
203	=back	214	=back
204		215
205	=head2 SUPPORT FUNCTIONS	216	=head2 SUPPORT FUNCTIONS
206		217
…		…
308		319
309	# support function to convert a fd into a perl filehandle	320	# support function to convert a fd into a perl filehandle
310	sub _fd2fh {	321	sub _fd2fh {
311	return undef if $_[0] < 0;	322	return undef if $_[0] < 0;
312		323
313	# try to be perl5.6-compatible	324	# try to generate nice filehandles
314	local *AIO_FH;	325	my $sym = "IO::AIO::fd#$_[0]";
315	open AIO_FH, "+<&=$_[0]"	326	local *$sym;
		327
		328	open *$sym, "+<&=$_[0]" # usually works under any unix
		329	or open *$sym, "<&=$_[0]" # cygwin needs this
		330	or open *$sym, ">&=$_[0]" # or this
316	or return undef;	331	or return undef;
317		332
318	*AIO_FH	333	*$sym
319	}	334	}
320		335
321	min_parallel 4;	336	min_parallel 4;
322		337
323	END {	338	END {
324	max_parallel 0;	339	max_parallel 0;
325	}	340	}
326		341
327	1;	342	1;
328		343
		344	=head2 FORK BEHAVIOUR
		345
		346	IO::AIO handles all outstanding AIO requests before the fork, destroys all
		347	AIO threads, and recreates them in both the parent and the child after the
		348	fork.
		349
		350
329	=head1 SEE ALSO	351	=head1 SEE ALSO
330		352
331	L<Coro>, L<Linux::AIO>.	353	L<Coro>, L<Linux::AIO>.
332		354
333	=head1 AUTHOR	355	=head1 AUTHOR

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Comparing IO-AIO/AIO.pm (file contents): Revision 1.21 by root, Wed Jul 13 00:13:09 2005 UTC vs. Revision 1.27 by root, Tue Aug 16 22:22:18 2005 UTC

Diff Legend

Comparing IO-AIO/AIO.pm (file contents):
Revision 1.21 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.27 by root, Tue Aug 16 22:22:18 2005 UTC