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71 | use strict 'vars'; |
71 | use strict 'vars'; |
72 | |
72 | |
73 | use base 'Exporter'; |
73 | use base 'Exporter'; |
74 | |
74 | |
75 | BEGIN { |
75 | BEGIN { |
76 | our $VERSION = '1.99'; |
76 | our $VERSION = '2.0'; |
77 | |
77 | |
78 | our @EXPORT = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat |
78 | our @EXPORT = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat |
79 | aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink |
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 |
80 | aio_fsync aio_fdatasync aio_readahead aio_rename aio_link aio_move |
81 | aio_group); |
81 | aio_group); |
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… | |
100 | syscall has been executed asynchronously. |
100 | syscall has been executed asynchronously. |
101 | |
101 | |
102 | All functions expecting a filehandle keep a copy of the filehandle |
102 | All functions expecting a filehandle keep a copy of the filehandle |
103 | internally until the request has finished. |
103 | internally until the request has finished. |
104 | |
104 | |
105 | All non-composite requests (requests that are not broken down into |
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106 | multiple requests) return objects of type L<IO::AIO::REQ> that allow |
105 | All requests return objects of type L<IO::AIO::REQ> that allow further |
107 | further manipulation of running requests. |
106 | manipulation of those requests while they are in-flight. |
108 | |
107 | |
109 | The pathnames you pass to these routines I<must> be absolute and |
108 | The pathnames you pass to these routines I<must> be absolute and |
110 | encoded in byte form. The reason for the former is that at the time the |
109 | encoded in byte form. The reason for the former is that at the time the |
111 | request is being executed, the current working directory could have |
110 | request is being executed, the current working directory could have |
112 | changed. Alternatively, you can make sure that you never change the |
111 | changed. Alternatively, you can make sure that you never change the |
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199 | =cut |
198 | =cut |
200 | |
199 | |
201 | sub aio_move($$$) { |
200 | sub aio_move($$$) { |
202 | my ($src, $dst, $cb) = @_; |
201 | my ($src, $dst, $cb) = @_; |
203 | |
202 | |
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203 | my $grp = aio_group; |
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204 | |
204 | aio_rename $src, $dst, sub { |
205 | add $grp aio_rename $src, $dst, sub { |
205 | if ($_[0] && $! == EXDEV) { |
206 | if ($_[0] && $! == EXDEV) { |
206 | aio_open $src, O_RDONLY, 0, sub { |
207 | add $grp aio_open $src, O_RDONLY, 0, sub { |
207 | if (my $src_fh = $_[0]) { |
208 | if (my $src_fh = $_[0]) { |
208 | my @stat = stat $src_fh; |
209 | my @stat = stat $src_fh; |
209 | |
210 | |
210 | aio_open $dst, O_WRONLY, 0200, sub { |
211 | add $grp aio_open $dst, O_WRONLY, 0200, sub { |
211 | if (my $dst_fh = $_[0]) { |
212 | if (my $dst_fh = $_[0]) { |
212 | aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
213 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
213 | close $src_fh; |
214 | close $src_fh; |
214 | |
215 | |
215 | if ($_[0] == $stat[7]) { |
216 | if ($_[0] == $stat[7]) { |
216 | utime $stat[8], $stat[9], $dst; |
217 | utime $stat[8], $stat[9], $dst; |
217 | chmod $stat[2] & 07777, $dst_fh; |
218 | chmod $stat[2] & 07777, $dst_fh; |
218 | chown $stat[4], $stat[5], $dst_fh; |
219 | chown $stat[4], $stat[5], $dst_fh; |
219 | close $dst_fh; |
220 | close $dst_fh; |
220 | |
221 | |
221 | aio_unlink $src, sub { |
222 | add $grp aio_unlink $src, sub { |
222 | $cb->($_[0]); |
223 | $cb->($_[0]); |
223 | }; |
224 | }; |
224 | } else { |
225 | } else { |
225 | my $errno = $!; |
226 | my $errno = $!; |
226 | aio_unlink $dst, sub { |
227 | add $grp aio_unlink $dst, sub { |
227 | $! = $errno; |
228 | $! = $errno; |
228 | $cb->(-1); |
229 | $cb->(-1); |
229 | }; |
230 | }; |
230 | } |
231 | } |
231 | }; |
232 | }; |
… | |
… | |
240 | }; |
241 | }; |
241 | } else { |
242 | } else { |
242 | $cb->($_[0]); |
243 | $cb->($_[0]); |
243 | } |
244 | } |
244 | }; |
245 | }; |
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246 | |
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247 | $grp |
245 | } |
248 | } |
246 | |
249 | |
247 | =item aio_sendfile $out_fh, $in_fh, $in_offset, $length, $callback->($retval) |
250 | =item aio_sendfile $out_fh, $in_fh, $in_offset, $length, $callback->($retval) |
248 | |
251 | |
249 | Tries to copy C<$length> bytes from C<$in_fh> to C<$out_fh>. It starts |
252 | Tries to copy C<$length> bytes from C<$in_fh> to C<$out_fh>. It starts |
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… | |
392 | =cut |
395 | =cut |
393 | |
396 | |
394 | sub aio_scandir($$$) { |
397 | sub aio_scandir($$$) { |
395 | my ($path, $maxreq, $cb) = @_; |
398 | my ($path, $maxreq, $cb) = @_; |
396 | |
399 | |
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400 | my $grp = aio_group; |
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401 | |
397 | $maxreq = 8 if $maxreq <= 0; |
402 | $maxreq = 8 if $maxreq <= 0; |
398 | |
403 | |
399 | # stat once |
404 | # stat once |
400 | aio_stat $path, sub { |
405 | add $grp aio_stat $path, sub { |
401 | return $cb->() if $_[0]; |
406 | return $cb->() if $_[0]; |
402 | my $now = time; |
407 | my $now = time; |
403 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
408 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
404 | |
409 | |
405 | # read the directory entries |
410 | # read the directory entries |
406 | aio_readdir $path, sub { |
411 | add $grp aio_readdir $path, sub { |
407 | my $entries = shift |
412 | my $entries = shift |
408 | or return $cb->(); |
413 | or return $cb->(); |
409 | |
414 | |
410 | # stat the dir another time |
415 | # stat the dir another time |
411 | aio_stat $path, sub { |
416 | add $grp aio_stat $path, sub { |
412 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
417 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
413 | |
418 | |
414 | my $ndirs; |
419 | my $ndirs; |
415 | |
420 | |
416 | # take the slow route if anything looks fishy |
421 | # take the slow route if anything looks fishy |
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438 | $schedcb = sub { |
443 | $schedcb = sub { |
439 | if (@$entries) { |
444 | if (@$entries) { |
440 | if ($nreq < $maxreq) { |
445 | if ($nreq < $maxreq) { |
441 | my $ent = pop @$entries; |
446 | my $ent = pop @$entries; |
442 | $nreq++; |
447 | $nreq++; |
443 | aio_stat "$path/$ent/.", sub { $statcb->($_[0], $ent) }; |
448 | add $grp aio_stat "$path/$ent/.", sub { $statcb->($_[0], $ent) }; |
444 | } |
449 | } |
445 | } elsif (!$nreq) { |
450 | } elsif (!$nreq) { |
446 | # finished |
451 | # finished |
447 | undef $statcb; |
452 | undef $statcb; |
448 | undef $schedcb; |
453 | undef $schedcb; |
… | |
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457 | $nreq--; |
462 | $nreq--; |
458 | push @nondirs, $entry; |
463 | push @nondirs, $entry; |
459 | &$schedcb; |
464 | &$schedcb; |
460 | } else { |
465 | } else { |
461 | # need to check for real directory |
466 | # need to check for real directory |
462 | aio_lstat "$path/$entry", sub { |
467 | add $grp aio_lstat "$path/$entry", sub { |
463 | $nreq--; |
468 | $nreq--; |
464 | |
469 | |
465 | if (-d _) { |
470 | if (-d _) { |
466 | push @dirs, $entry; |
471 | push @dirs, $entry; |
467 | |
472 | |
… | |
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480 | |
485 | |
481 | &$schedcb while @$entries && $nreq < $maxreq; |
486 | &$schedcb while @$entries && $nreq < $maxreq; |
482 | }; |
487 | }; |
483 | }; |
488 | }; |
484 | }; |
489 | }; |
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490 | |
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491 | $grp |
485 | } |
492 | } |
486 | |
493 | |
487 | =item aio_fsync $fh, $callback->($status) |
494 | =item aio_fsync $fh, $callback->($status) |
488 | |
495 | |
489 | Asynchronously call fsync on the given filehandle and call the callback |
496 | Asynchronously call fsync on the given filehandle and call the callback |
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496 | |
503 | |
497 | If this call isn't available because your OS lacks it or it couldn't be |
504 | If this call isn't available because your OS lacks it or it couldn't be |
498 | detected, it will be emulated by calling C<fsync> instead. |
505 | detected, it will be emulated by calling C<fsync> instead. |
499 | |
506 | |
500 | =item aio_group $callback->() |
507 | =item aio_group $callback->() |
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508 | |
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509 | [EXPERIMENTAL] |
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510 | |
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511 | This is a very special aio request: Instead of doing something, it is a |
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512 | container for other aio requests, which is useful if you want to bundle |
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513 | many requests into a single, composite, request. |
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514 | |
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515 | Returns an object of class L<IO::AIO::GRP>. See its documentation below |
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516 | for more info. |
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517 | |
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518 | Example: |
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519 | |
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520 | my $grp = aio_group sub { |
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521 | print "all stats done\n"; |
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522 | }; |
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523 | |
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524 | add $grp |
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525 | (aio_stat ...), |
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526 | (aio_stat ...), |
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527 | ...; |
501 | |
528 | |
502 | =item aio_sleep $fractional_seconds, $callback->() *NOT EXPORTED* |
529 | =item aio_sleep $fractional_seconds, $callback->() *NOT EXPORTED* |
503 | |
530 | |
504 | Mainly used for debugging and benchmarking, this aio request puts one of |
531 | Mainly used for debugging and benchmarking, this aio request puts one of |
505 | the request workers to sleep for the given time. |
532 | the request workers to sleep for the given time. |
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… | |
529 | untouched. That means that requests that currently execute will not be |
556 | untouched. That means that requests that currently execute will not be |
530 | stopped and resources held by the request will not be freed prematurely. |
557 | stopped and resources held by the request will not be freed prematurely. |
531 | |
558 | |
532 | =back |
559 | =back |
533 | |
560 | |
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561 | =head2 IO::AIO::GRP CLASS |
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562 | |
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563 | This class is a subclass of L<IO::AIO::REQ>, so all its methods apply to |
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564 | objects of this class, too. |
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565 | |
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566 | A IO::AIO::GRP object is a special request that can contain multiple other |
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567 | aio requests. |
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568 | |
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569 | You create one by calling the C<aio_group> constructing function with a |
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570 | callback that will be called when all contained requests have entered the |
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571 | C<done> state: |
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572 | |
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573 | my $grp = aio_group sub { |
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574 | print "all requests are done\n"; |
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575 | }; |
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576 | |
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577 | You add requests by calling the C<add> method with one or more |
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578 | C<IO::AIO::REQ> objects: |
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579 | |
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580 | $grp->add (aio_unlink "..."); |
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581 | |
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582 | add $grp aio_stat "...", sub { ... }; |
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583 | |
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584 | This makes it very easy to create composite requests (see the source of |
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585 | C<aio_move> for an application) that work and feel like simple requests. |
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586 | |
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587 | The IO::AIO::GRP objects will be cleaned up during calls to |
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588 | C<IO::AIO::poll_cb>, just like any other request. |
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589 | |
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590 | They can be canceled like any other request. Canceling will cancel not |
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591 | just the request itself, but also all requests it contains. |
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592 | |
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593 | They can also can also be added to other IO::AIO::GRP objects. |
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594 | |
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595 | Their lifetime, simplified, looks like this: when they are empty, they |
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596 | will finish very quickly. If they contain only requests that are in the |
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597 | C<done> state, they will also finish. Otherwise they will continue to |
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598 | exist. |
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599 | |
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600 | =over 4 |
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601 | |
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602 | =item $grp->add (...) |
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603 | |
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604 | =item add $grp ... |
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605 | |
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606 | Add one or more |
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607 | Cancels the request, if possible. Has the effect of skipping execution |
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608 | when entering the B<execute> state and skipping calling the callback when |
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609 | entering the the B<result> state, but will leave the request otherwise |
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610 | untouched. That means that requests that currently execute will not be |
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611 | stopped and resources held by the request will not be freed prematurely. |
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612 | |
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613 | =back |
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614 | |
534 | =head2 SUPPORT FUNCTIONS |
615 | =head2 SUPPORT FUNCTIONS |
535 | |
616 | |
536 | =over 4 |
617 | =over 4 |
537 | |
618 | |
538 | =item $fileno = IO::AIO::poll_fileno |
619 | =item $fileno = IO::AIO::poll_fileno |