… | |
… | |
26 | $req->cancel; # cancel request if still in queue |
26 | $req->cancel; # cancel request if still in queue |
27 | |
27 | |
28 | my $grp = aio_group sub { print "all stats done\n" }; |
28 | my $grp = aio_group sub { print "all stats done\n" }; |
29 | add $grp aio_stat "..." for ...; |
29 | add $grp aio_stat "..." for ...; |
30 | |
30 | |
31 | # AnyEvent integration |
31 | # AnyEvent integration (EV, Event, Glib, Tk, urxvt, pureperl...) |
32 | open my $fh, "<&=" . IO::AIO::poll_fileno or die "$!"; |
32 | open my $fh, "<&=" . IO::AIO::poll_fileno or die "$!"; |
33 | my $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { IO::AIO::poll_cb }); |
33 | my $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { IO::AIO::poll_cb }); |
|
|
34 | |
|
|
35 | # EV integration |
|
|
36 | my $w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb; |
34 | |
37 | |
35 | # Event integration |
38 | # Event integration |
36 | Event->io (fd => IO::AIO::poll_fileno, |
39 | Event->io (fd => IO::AIO::poll_fileno, |
37 | poll => 'r', |
40 | poll => 'r', |
38 | cb => \&IO::AIO::poll_cb); |
41 | cb => \&IO::AIO::poll_cb); |
… | |
… | |
191 | use strict 'vars'; |
194 | use strict 'vars'; |
192 | |
195 | |
193 | use base 'Exporter'; |
196 | use base 'Exporter'; |
194 | |
197 | |
195 | BEGIN { |
198 | BEGIN { |
196 | our $VERSION = '2.51'; |
199 | our $VERSION = '2.62'; |
197 | |
200 | |
198 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat |
201 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
199 | aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink |
202 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir |
200 | aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link |
203 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
|
|
204 | aio_fdatasync aio_pathsync aio_readahead |
|
|
205 | aio_rename aio_link aio_move aio_copy aio_group |
201 | aio_move aio_copy aio_group aio_nop aio_mknod aio_load aio_rmtree aio_mkdir |
206 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
202 | aio_chown aio_chmod aio_utime aio_truncate); |
207 | aio_chmod aio_utime aio_truncate); |
|
|
208 | |
203 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block)); |
209 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); |
204 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
210 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
205 | min_parallel max_parallel max_idle |
211 | min_parallel max_parallel max_idle |
206 | nreqs nready npending nthreads |
212 | nreqs nready npending nthreads |
207 | max_poll_time max_poll_reqs); |
213 | max_poll_time max_poll_reqs); |
208 | |
214 | |
… | |
… | |
316 | |
322 | |
317 | Asynchronously close a file and call the callback with the result |
323 | Asynchronously close a file and call the callback with the result |
318 | code. |
324 | code. |
319 | |
325 | |
320 | Unfortunately, you can't do this to perl. Perl I<insists> very strongly on |
326 | Unfortunately, you can't do this to perl. Perl I<insists> very strongly on |
321 | closing the file descriptor associated with the filehandle itself. Here is |
327 | closing the file descriptor associated with the filehandle itself. |
322 | what aio_close will try: |
|
|
323 | |
328 | |
324 | 1. dup()licate the fd |
329 | Therefore, C<aio_close> will not close the filehandle - instead it will |
325 | 2. asynchronously close() the duplicated fd |
330 | use dup2 to overwrite the file descriptor with the write-end of a pipe |
326 | 3. dup()licate the fd once more |
331 | (the pipe fd will be created on demand and will be cached). |
327 | 4. let perl close() the filehandle |
|
|
328 | 5. asynchronously close the duplicated fd |
|
|
329 | |
332 | |
330 | The idea is that the first close() flushes stuff to disk that closing an |
333 | Or in other words: the file descriptor will be closed, but it will not be |
331 | fd will flush, so when perl closes the fd, nothing much will need to be |
334 | free for reuse until the perl filehandle is closed. |
332 | flushed. The second async. close() will then flush stuff to disk that |
|
|
333 | closing the last fd to the file will flush. |
|
|
334 | |
|
|
335 | Just FYI, SuSv3 has this to say on close: |
|
|
336 | |
|
|
337 | All outstanding record locks owned by the process on the file |
|
|
338 | associated with the file descriptor shall be removed. |
|
|
339 | |
|
|
340 | If fildes refers to a socket, close() shall cause the socket to be |
|
|
341 | destroyed. ... close() shall block for up to the current linger |
|
|
342 | interval until all data is transmitted. |
|
|
343 | [this actually sounds like a specification bug, but who knows] |
|
|
344 | |
|
|
345 | And at least Linux additionally actually flushes stuff on every close, |
|
|
346 | even when the file itself is still open. |
|
|
347 | |
|
|
348 | Sounds enourmously inefficient and complicated? Yes... please show me how |
|
|
349 | to nuke perl's fd out of existence... |
|
|
350 | |
335 | |
351 | =cut |
336 | =cut |
352 | |
|
|
353 | sub aio_close($;$) { |
|
|
354 | aio_block { |
|
|
355 | my ($fh, $cb) = @_; |
|
|
356 | |
|
|
357 | my $pri = aioreq_pri; |
|
|
358 | my $grp = aio_group $cb; |
|
|
359 | |
|
|
360 | my $fd = fileno $fh; |
|
|
361 | |
|
|
362 | defined $fd or Carp::croak "aio_close called with fd-less filehandle"; |
|
|
363 | |
|
|
364 | # if the dups fail we will simply get EBADF |
|
|
365 | my $fd2 = _dup $fd; |
|
|
366 | aioreq_pri $pri; |
|
|
367 | add $grp _aio_close $fd2, sub { |
|
|
368 | my $fd2 = _dup $fd; |
|
|
369 | close $fh; |
|
|
370 | aioreq_pri $pri; |
|
|
371 | add $grp _aio_close $fd2, sub { |
|
|
372 | $grp->result ($_[0]); |
|
|
373 | }; |
|
|
374 | }; |
|
|
375 | |
|
|
376 | $grp |
|
|
377 | } |
|
|
378 | } |
|
|
379 | |
|
|
380 | |
337 | |
381 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
338 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
382 | |
339 | |
383 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
340 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
384 | |
341 | |
… | |
… | |
583 | memory. Status is the same as with aio_read. |
540 | memory. Status is the same as with aio_read. |
584 | |
541 | |
585 | =cut |
542 | =cut |
586 | |
543 | |
587 | sub aio_load($$;$) { |
544 | sub aio_load($$;$) { |
588 | aio_block { |
|
|
589 | my ($path, undef, $cb) = @_; |
545 | my ($path, undef, $cb) = @_; |
590 | my $data = \$_[1]; |
546 | my $data = \$_[1]; |
591 | |
547 | |
592 | my $pri = aioreq_pri; |
548 | my $pri = aioreq_pri; |
593 | my $grp = aio_group $cb; |
549 | my $grp = aio_group $cb; |
|
|
550 | |
|
|
551 | aioreq_pri $pri; |
|
|
552 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
553 | my $fh = shift |
|
|
554 | or return $grp->result (-1); |
594 | |
555 | |
595 | aioreq_pri $pri; |
556 | aioreq_pri $pri; |
596 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
597 | my $fh = shift |
|
|
598 | or return $grp->result (-1); |
|
|
599 | |
|
|
600 | aioreq_pri $pri; |
|
|
601 | add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub { |
557 | add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub { |
602 | $grp->result ($_[0]); |
558 | $grp->result ($_[0]); |
603 | }; |
|
|
604 | }; |
559 | }; |
605 | |
|
|
606 | $grp |
|
|
607 | } |
560 | }; |
|
|
561 | |
|
|
562 | $grp |
608 | } |
563 | } |
609 | |
564 | |
610 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
565 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
611 | |
566 | |
612 | Try to copy the I<file> (directories not supported as either source or |
567 | Try to copy the I<file> (directories not supported as either source or |
… | |
… | |
623 | errors are being ignored. |
578 | errors are being ignored. |
624 | |
579 | |
625 | =cut |
580 | =cut |
626 | |
581 | |
627 | sub aio_copy($$;$) { |
582 | sub aio_copy($$;$) { |
628 | aio_block { |
|
|
629 | my ($src, $dst, $cb) = @_; |
583 | my ($src, $dst, $cb) = @_; |
630 | |
584 | |
631 | my $pri = aioreq_pri; |
585 | my $pri = aioreq_pri; |
632 | my $grp = aio_group $cb; |
586 | my $grp = aio_group $cb; |
633 | |
587 | |
634 | aioreq_pri $pri; |
588 | aioreq_pri $pri; |
635 | add $grp aio_open $src, O_RDONLY, 0, sub { |
589 | add $grp aio_open $src, O_RDONLY, 0, sub { |
636 | if (my $src_fh = $_[0]) { |
590 | if (my $src_fh = $_[0]) { |
637 | my @stat = stat $src_fh; |
591 | my @stat = stat $src_fh; |
638 | |
592 | |
639 | aioreq_pri $pri; |
593 | aioreq_pri $pri; |
640 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
594 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
641 | if (my $dst_fh = $_[0]) { |
595 | if (my $dst_fh = $_[0]) { |
642 | aioreq_pri $pri; |
596 | aioreq_pri $pri; |
643 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
597 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
644 | if ($_[0] == $stat[7]) { |
598 | if ($_[0] == $stat[7]) { |
645 | $grp->result (0); |
599 | $grp->result (0); |
646 | close $src_fh; |
600 | close $src_fh; |
647 | |
601 | |
648 | # those should not normally block. should. should. |
602 | # those should not normally block. should. should. |
649 | utime $stat[8], $stat[9], $dst; |
603 | utime $stat[8], $stat[9], $dst; |
650 | chmod $stat[2] & 07777, $dst_fh; |
604 | chmod $stat[2] & 07777, $dst_fh; |
651 | chown $stat[4], $stat[5], $dst_fh; |
605 | chown $stat[4], $stat[5], $dst_fh; |
|
|
606 | |
|
|
607 | aioreq_pri $pri; |
652 | close $dst_fh; |
608 | add $grp aio_close $dst_fh; |
653 | } else { |
609 | } else { |
654 | $grp->result (-1); |
610 | $grp->result (-1); |
655 | close $src_fh; |
611 | close $src_fh; |
656 | close $dst_fh; |
612 | close $dst_fh; |
657 | |
613 | |
658 | aioreq $pri; |
614 | aioreq $pri; |
659 | add $grp aio_unlink $dst; |
615 | add $grp aio_unlink $dst; |
660 | } |
|
|
661 | }; |
616 | } |
662 | } else { |
|
|
663 | $grp->result (-1); |
|
|
664 | } |
617 | }; |
|
|
618 | } else { |
|
|
619 | $grp->result (-1); |
665 | }, |
620 | } |
666 | |
|
|
667 | } else { |
|
|
668 | $grp->result (-1); |
|
|
669 | } |
621 | }, |
|
|
622 | |
|
|
623 | } else { |
|
|
624 | $grp->result (-1); |
670 | }; |
625 | } |
671 | |
|
|
672 | $grp |
|
|
673 | } |
626 | }; |
|
|
627 | |
|
|
628 | $grp |
674 | } |
629 | } |
675 | |
630 | |
676 | =item aio_move $srcpath, $dstpath, $callback->($status) |
631 | =item aio_move $srcpath, $dstpath, $callback->($status) |
677 | |
632 | |
678 | Try to move the I<file> (directories not supported as either source or |
633 | Try to move the I<file> (directories not supported as either source or |
… | |
… | |
684 | that is successful, unlinking the C<$srcpath>. |
639 | that is successful, unlinking the C<$srcpath>. |
685 | |
640 | |
686 | =cut |
641 | =cut |
687 | |
642 | |
688 | sub aio_move($$;$) { |
643 | sub aio_move($$;$) { |
689 | aio_block { |
|
|
690 | my ($src, $dst, $cb) = @_; |
644 | my ($src, $dst, $cb) = @_; |
691 | |
645 | |
692 | my $pri = aioreq_pri; |
646 | my $pri = aioreq_pri; |
693 | my $grp = aio_group $cb; |
647 | my $grp = aio_group $cb; |
694 | |
648 | |
695 | aioreq_pri $pri; |
649 | aioreq_pri $pri; |
696 | add $grp aio_rename $src, $dst, sub { |
650 | add $grp aio_rename $src, $dst, sub { |
697 | if ($_[0] && $! == EXDEV) { |
651 | if ($_[0] && $! == EXDEV) { |
698 | aioreq_pri $pri; |
652 | aioreq_pri $pri; |
699 | add $grp aio_copy $src, $dst, sub { |
653 | add $grp aio_copy $src, $dst, sub { |
700 | $grp->result ($_[0]); |
|
|
701 | |
|
|
702 | if (!$_[0]) { |
|
|
703 | aioreq_pri $pri; |
|
|
704 | add $grp aio_unlink $src; |
|
|
705 | } |
|
|
706 | }; |
|
|
707 | } else { |
|
|
708 | $grp->result ($_[0]); |
654 | $grp->result ($_[0]); |
|
|
655 | |
|
|
656 | if (!$_[0]) { |
|
|
657 | aioreq_pri $pri; |
|
|
658 | add $grp aio_unlink $src; |
|
|
659 | } |
709 | } |
660 | }; |
|
|
661 | } else { |
|
|
662 | $grp->result ($_[0]); |
710 | }; |
663 | } |
711 | |
|
|
712 | $grp |
|
|
713 | } |
664 | }; |
|
|
665 | |
|
|
666 | $grp |
714 | } |
667 | } |
715 | |
668 | |
716 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
669 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
717 | |
670 | |
718 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
671 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
… | |
… | |
766 | directory counting heuristic. |
719 | directory counting heuristic. |
767 | |
720 | |
768 | =cut |
721 | =cut |
769 | |
722 | |
770 | sub aio_scandir($$;$) { |
723 | sub aio_scandir($$;$) { |
771 | aio_block { |
|
|
772 | my ($path, $maxreq, $cb) = @_; |
724 | my ($path, $maxreq, $cb) = @_; |
773 | |
725 | |
774 | my $pri = aioreq_pri; |
726 | my $pri = aioreq_pri; |
775 | |
727 | |
776 | my $grp = aio_group $cb; |
728 | my $grp = aio_group $cb; |
777 | |
729 | |
778 | $maxreq = 4 if $maxreq <= 0; |
730 | $maxreq = 4 if $maxreq <= 0; |
779 | |
731 | |
780 | # stat once |
732 | # stat once |
|
|
733 | aioreq_pri $pri; |
|
|
734 | add $grp aio_stat $path, sub { |
|
|
735 | return $grp->result () if $_[0]; |
|
|
736 | my $now = time; |
|
|
737 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
738 | |
|
|
739 | # read the directory entries |
781 | aioreq_pri $pri; |
740 | aioreq_pri $pri; |
782 | add $grp aio_stat $path, sub { |
741 | add $grp aio_readdir $path, sub { |
|
|
742 | my $entries = shift |
783 | return $grp->result () if $_[0]; |
743 | or return $grp->result (); |
784 | my $now = time; |
|
|
785 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
786 | |
744 | |
787 | # read the directory entries |
745 | # stat the dir another time |
788 | aioreq_pri $pri; |
746 | aioreq_pri $pri; |
789 | add $grp aio_readdir $path, sub { |
|
|
790 | my $entries = shift |
|
|
791 | or return $grp->result (); |
|
|
792 | |
|
|
793 | # stat the dir another time |
|
|
794 | aioreq_pri $pri; |
|
|
795 | add $grp aio_stat $path, sub { |
747 | add $grp aio_stat $path, sub { |
796 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
748 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
797 | |
749 | |
798 | my $ndirs; |
750 | my $ndirs; |
799 | |
751 | |
800 | # take the slow route if anything looks fishy |
752 | # take the slow route if anything looks fishy |
801 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
753 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
802 | $ndirs = -1; |
754 | $ndirs = -1; |
803 | } else { |
755 | } else { |
804 | # if nlink == 2, we are finished |
756 | # if nlink == 2, we are finished |
805 | # on non-posix-fs's, we rely on nlink < 2 |
757 | # on non-posix-fs's, we rely on nlink < 2 |
806 | $ndirs = (stat _)[3] - 2 |
758 | $ndirs = (stat _)[3] - 2 |
807 | or return $grp->result ([], $entries); |
759 | or return $grp->result ([], $entries); |
808 | } |
760 | } |
809 | |
761 | |
810 | # sort into likely dirs and likely nondirs |
762 | # sort into likely dirs and likely nondirs |
811 | # dirs == files without ".", short entries first |
763 | # dirs == files without ".", short entries first |
812 | $entries = [map $_->[0], |
764 | $entries = [map $_->[0], |
813 | sort { $b->[1] cmp $a->[1] } |
765 | sort { $b->[1] cmp $a->[1] } |
814 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
766 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
815 | @$entries]; |
767 | @$entries]; |
816 | |
768 | |
817 | my (@dirs, @nondirs); |
769 | my (@dirs, @nondirs); |
818 | |
770 | |
819 | my $statgrp = add $grp aio_group sub { |
771 | my $statgrp = add $grp aio_group sub { |
820 | $grp->result (\@dirs, \@nondirs); |
772 | $grp->result (\@dirs, \@nondirs); |
821 | }; |
773 | }; |
822 | |
774 | |
823 | limit $statgrp $maxreq; |
775 | limit $statgrp $maxreq; |
824 | feed $statgrp sub { |
776 | feed $statgrp sub { |
825 | return unless @$entries; |
777 | return unless @$entries; |
826 | my $entry = pop @$entries; |
778 | my $entry = pop @$entries; |
827 | |
779 | |
828 | aioreq_pri $pri; |
780 | aioreq_pri $pri; |
829 | add $statgrp aio_stat "$path/$entry/.", sub { |
781 | add $statgrp aio_stat "$path/$entry/.", sub { |
830 | if ($_[0] < 0) { |
782 | if ($_[0] < 0) { |
831 | push @nondirs, $entry; |
783 | push @nondirs, $entry; |
832 | } else { |
784 | } else { |
833 | # need to check for real directory |
785 | # need to check for real directory |
834 | aioreq_pri $pri; |
786 | aioreq_pri $pri; |
835 | add $statgrp aio_lstat "$path/$entry", sub { |
787 | add $statgrp aio_lstat "$path/$entry", sub { |
836 | if (-d _) { |
788 | if (-d _) { |
837 | push @dirs, $entry; |
789 | push @dirs, $entry; |
838 | |
790 | |
839 | unless (--$ndirs) { |
791 | unless (--$ndirs) { |
840 | push @nondirs, @$entries; |
792 | push @nondirs, @$entries; |
841 | feed $statgrp; |
793 | feed $statgrp; |
842 | } |
|
|
843 | } else { |
|
|
844 | push @nondirs, $entry; |
|
|
845 | } |
794 | } |
|
|
795 | } else { |
|
|
796 | push @nondirs, $entry; |
846 | } |
797 | } |
847 | } |
798 | } |
848 | }; |
799 | } |
849 | }; |
800 | }; |
850 | }; |
801 | }; |
851 | }; |
802 | }; |
852 | }; |
803 | }; |
853 | |
|
|
854 | $grp |
|
|
855 | } |
804 | }; |
|
|
805 | |
|
|
806 | $grp |
856 | } |
807 | } |
857 | |
808 | |
858 | =item aio_rmtree $path, $callback->($status) |
809 | =item aio_rmtree $path, $callback->($status) |
859 | |
810 | |
860 | Delete a directory tree starting (and including) C<$path>, return the |
811 | Delete a directory tree starting (and including) C<$path>, return the |
… | |
… | |
864 | |
815 | |
865 | =cut |
816 | =cut |
866 | |
817 | |
867 | sub aio_rmtree; |
818 | sub aio_rmtree; |
868 | sub aio_rmtree($;$) { |
819 | sub aio_rmtree($;$) { |
869 | aio_block { |
|
|
870 | my ($path, $cb) = @_; |
820 | my ($path, $cb) = @_; |
871 | |
821 | |
872 | my $pri = aioreq_pri; |
822 | my $pri = aioreq_pri; |
873 | my $grp = aio_group $cb; |
823 | my $grp = aio_group $cb; |
874 | |
824 | |
875 | aioreq_pri $pri; |
825 | aioreq_pri $pri; |
876 | add $grp aio_scandir $path, 0, sub { |
826 | add $grp aio_scandir $path, 0, sub { |
877 | my ($dirs, $nondirs) = @_; |
827 | my ($dirs, $nondirs) = @_; |
878 | |
828 | |
879 | my $dirgrp = aio_group sub { |
829 | my $dirgrp = aio_group sub { |
880 | add $grp aio_rmdir $path, sub { |
830 | add $grp aio_rmdir $path, sub { |
881 | $grp->result ($_[0]); |
831 | $grp->result ($_[0]); |
882 | }; |
|
|
883 | }; |
832 | }; |
884 | |
|
|
885 | (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs; |
|
|
886 | (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs; |
|
|
887 | |
|
|
888 | add $grp $dirgrp; |
|
|
889 | }; |
833 | }; |
890 | |
834 | |
891 | $grp |
835 | (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs; |
|
|
836 | (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs; |
|
|
837 | |
|
|
838 | add $grp $dirgrp; |
892 | } |
839 | }; |
|
|
840 | |
|
|
841 | $grp |
893 | } |
842 | } |
|
|
843 | |
|
|
844 | =item aio_sync $callback->($status) |
|
|
845 | |
|
|
846 | Asynchronously call sync and call the callback when finished. |
894 | |
847 | |
895 | =item aio_fsync $fh, $callback->($status) |
848 | =item aio_fsync $fh, $callback->($status) |
896 | |
849 | |
897 | Asynchronously call fsync on the given filehandle and call the callback |
850 | Asynchronously call fsync on the given filehandle and call the callback |
898 | with the fsync result code. |
851 | with the fsync result code. |
… | |
… | |
902 | Asynchronously call fdatasync on the given filehandle and call the |
855 | Asynchronously call fdatasync on the given filehandle and call the |
903 | callback with the fdatasync result code. |
856 | callback with the fdatasync result code. |
904 | |
857 | |
905 | If this call isn't available because your OS lacks it or it couldn't be |
858 | If this call isn't available because your OS lacks it or it couldn't be |
906 | detected, it will be emulated by calling C<fsync> instead. |
859 | detected, it will be emulated by calling C<fsync> instead. |
|
|
860 | |
|
|
861 | =item aio_pathsync $path, $callback->($status) |
|
|
862 | |
|
|
863 | This request tries to open, fsync and close the given path. This is a |
|
|
864 | composite request intended tosync directories after directory operations |
|
|
865 | (E.g. rename). This might not work on all operating systems or have any |
|
|
866 | specific effect, but usually it makes sure that directory changes get |
|
|
867 | written to disc. It works for anything that can be opened for read-only, |
|
|
868 | not just directories. |
|
|
869 | |
|
|
870 | Passes C<0> when everything went ok, and C<-1> on error. |
|
|
871 | |
|
|
872 | =cut |
|
|
873 | |
|
|
874 | sub aio_pathsync($;$) { |
|
|
875 | my ($path, $cb) = @_; |
|
|
876 | |
|
|
877 | my $pri = aioreq_pri; |
|
|
878 | my $grp = aio_group $cb; |
|
|
879 | |
|
|
880 | aioreq_pri $pri; |
|
|
881 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
882 | my ($fh) = @_; |
|
|
883 | if ($fh) { |
|
|
884 | aioreq_pri $pri; |
|
|
885 | add $grp aio_fsync $fh, sub { |
|
|
886 | $grp->result ($_[0]); |
|
|
887 | |
|
|
888 | aioreq_pri $pri; |
|
|
889 | add $grp aio_close $fh; |
|
|
890 | }; |
|
|
891 | } else { |
|
|
892 | $grp->result (-1); |
|
|
893 | } |
|
|
894 | }; |
|
|
895 | |
|
|
896 | $grp |
|
|
897 | } |
907 | |
898 | |
908 | =item aio_group $callback->(...) |
899 | =item aio_group $callback->(...) |
909 | |
900 | |
910 | This is a very special aio request: Instead of doing something, it is a |
901 | This is a very special aio request: Instead of doing something, it is a |
911 | container for other aio requests, which is useful if you want to bundle |
902 | container for other aio requests, which is useful if you want to bundle |
… | |
… | |
1048 | itself. Useful when you queued a lot of events but got a result early. |
1039 | itself. Useful when you queued a lot of events but got a result early. |
1049 | |
1040 | |
1050 | =item $grp->result (...) |
1041 | =item $grp->result (...) |
1051 | |
1042 | |
1052 | Set the result value(s) that will be passed to the group callback when all |
1043 | Set the result value(s) that will be passed to the group callback when all |
1053 | subrequests have finished and set thre groups errno to the current value |
1044 | subrequests have finished and set the groups errno to the current value |
1054 | of errno (just like calling C<errno> without an error number). By default, |
1045 | of errno (just like calling C<errno> without an error number). By default, |
1055 | no argument will be passed and errno is zero. |
1046 | no argument will be passed and errno is zero. |
1056 | |
1047 | |
1057 | =item $grp->errno ([$errno]) |
1048 | =item $grp->errno ([$errno]) |
1058 | |
1049 | |
… | |
… | |
1256 | |
1247 | |
1257 | The default is probably ok in most situations, especially if thread |
1248 | The default is probably ok in most situations, especially if thread |
1258 | creation is fast. If thread creation is very slow on your system you might |
1249 | creation is fast. If thread creation is very slow on your system you might |
1259 | want to use larger values. |
1250 | want to use larger values. |
1260 | |
1251 | |
1261 | =item $oldmaxreqs = IO::AIO::max_outstanding $maxreqs |
1252 | =item IO::AIO::max_outstanding $maxreqs |
1262 | |
1253 | |
1263 | This is a very bad function to use in interactive programs because it |
1254 | This is a very bad function to use in interactive programs because it |
1264 | blocks, and a bad way to reduce concurrency because it is inexact: Better |
1255 | blocks, and a bad way to reduce concurrency because it is inexact: Better |
1265 | use an C<aio_group> together with a feed callback. |
1256 | use an C<aio_group> together with a feed callback. |
1266 | |
1257 | |
… | |
… | |
1271 | |
1262 | |
1272 | The default value is very large, so there is no practical limit on the |
1263 | The default value is very large, so there is no practical limit on the |
1273 | number of outstanding requests. |
1264 | number of outstanding requests. |
1274 | |
1265 | |
1275 | You can still queue as many requests as you want. Therefore, |
1266 | You can still queue as many requests as you want. Therefore, |
1276 | C<max_oustsanding> is mainly useful in simple scripts (with low values) or |
1267 | C<max_outstanding> is mainly useful in simple scripts (with low values) or |
1277 | as a stop gap to shield against fatal memory overflow (with large values). |
1268 | as a stop gap to shield against fatal memory overflow (with large values). |
1278 | |
1269 | |
1279 | =back |
1270 | =back |
1280 | |
1271 | |
1281 | =head3 STATISTICAL INFORMATION |
1272 | =head3 STATISTICAL INFORMATION |