… | |
… | |
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 (EV, Event, Glib, Tk, urxvt, pureperl...) |
31 | # AnyEvent integration (EV, Event, Glib, Tk, POE, urxvt, pureperl...) |
32 | open my $fh, "<&=" . IO::AIO::poll_fileno or die "$!"; |
32 | use AnyEvent::AIO; |
33 | my $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { IO::AIO::poll_cb }); |
|
|
34 | |
33 | |
35 | # EV integration |
34 | # EV integration |
36 | my $w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb; |
35 | my $w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb; |
37 | |
36 | |
38 | # Event integration |
37 | # Event integration |
… | |
… | |
194 | use strict 'vars'; |
193 | use strict 'vars'; |
195 | |
194 | |
196 | use base 'Exporter'; |
195 | use base 'Exporter'; |
197 | |
196 | |
198 | BEGIN { |
197 | BEGIN { |
199 | our $VERSION = '2.6'; |
198 | our $VERSION = '3.07'; |
200 | |
199 | |
201 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
200 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
202 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir |
201 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir |
203 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
202 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
204 | aio_fdatasync aio_pathsync aio_readahead |
203 | aio_fdatasync aio_pathsync aio_readahead |
205 | aio_rename aio_link aio_move aio_copy aio_group |
204 | aio_rename aio_link aio_move aio_copy aio_group |
206 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
205 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
207 | aio_chmod aio_utime aio_truncate); |
206 | aio_chmod aio_utime aio_truncate); |
208 | |
207 | |
209 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block)); |
208 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); |
210 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
209 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
211 | min_parallel max_parallel max_idle |
210 | min_parallel max_parallel max_idle |
212 | nreqs nready npending nthreads |
211 | nreqs nready npending nthreads |
213 | max_poll_time max_poll_reqs); |
212 | max_poll_time max_poll_reqs); |
214 | |
213 | |
… | |
… | |
322 | |
321 | |
323 | Asynchronously close a file and call the callback with the result |
322 | Asynchronously close a file and call the callback with the result |
324 | code. |
323 | code. |
325 | |
324 | |
326 | Unfortunately, you can't do this to perl. Perl I<insists> very strongly on |
325 | Unfortunately, you can't do this to perl. Perl I<insists> very strongly on |
327 | closing the file descriptor associated with the filehandle itself. Here is |
326 | closing the file descriptor associated with the filehandle itself. |
328 | what aio_close will try: |
|
|
329 | |
327 | |
330 | 1. dup()licate the fd |
328 | Therefore, C<aio_close> will not close the filehandle - instead it will |
331 | 2. asynchronously close() the duplicated fd |
329 | use dup2 to overwrite the file descriptor with the write-end of a pipe |
332 | 3. dup()licate the fd once more |
330 | (the pipe fd will be created on demand and will be cached). |
333 | 4. let perl close() the filehandle |
|
|
334 | 5. asynchronously close the duplicated fd |
|
|
335 | |
331 | |
336 | The idea is that the first close() flushes stuff to disk that closing an |
332 | Or in other words: the file descriptor will be closed, but it will not be |
337 | fd will flush, so when perl closes the fd, nothing much will need to be |
333 | free for reuse until the perl filehandle is closed. |
338 | flushed. The second async. close() will then flush stuff to disk that |
|
|
339 | closing the last fd to the file will flush. |
|
|
340 | |
|
|
341 | Just FYI, SuSv3 has this to say on close: |
|
|
342 | |
|
|
343 | All outstanding record locks owned by the process on the file |
|
|
344 | associated with the file descriptor shall be removed. |
|
|
345 | |
|
|
346 | If fildes refers to a socket, close() shall cause the socket to be |
|
|
347 | destroyed. ... close() shall block for up to the current linger |
|
|
348 | interval until all data is transmitted. |
|
|
349 | [this actually sounds like a specification bug, but who knows] |
|
|
350 | |
|
|
351 | And at least Linux additionally actually flushes stuff on every close, |
|
|
352 | even when the file itself is still open. |
|
|
353 | |
|
|
354 | Sounds enourmously inefficient and complicated? Yes... please show me how |
|
|
355 | to nuke perl's fd out of existence... |
|
|
356 | |
334 | |
357 | =cut |
335 | =cut |
358 | |
|
|
359 | sub aio_close($;$) { |
|
|
360 | aio_block { |
|
|
361 | my ($fh, $cb) = @_; |
|
|
362 | |
|
|
363 | my $pri = aioreq_pri; |
|
|
364 | my $grp = aio_group $cb; |
|
|
365 | |
|
|
366 | my $fd = fileno $fh; |
|
|
367 | |
|
|
368 | defined $fd or Carp::croak "aio_close called with fd-less filehandle"; |
|
|
369 | |
|
|
370 | # if the dups fail we will simply get EBADF |
|
|
371 | my $fd2 = _dup $fd; |
|
|
372 | aioreq_pri $pri; |
|
|
373 | add $grp _aio_close $fd2, sub { |
|
|
374 | my $fd2 = _dup $fd; |
|
|
375 | close $fh; |
|
|
376 | aioreq_pri $pri; |
|
|
377 | add $grp _aio_close $fd2, sub { |
|
|
378 | $grp->result ($_[0]); |
|
|
379 | }; |
|
|
380 | }; |
|
|
381 | |
|
|
382 | $grp |
|
|
383 | } |
|
|
384 | } |
|
|
385 | |
|
|
386 | |
336 | |
387 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
337 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
388 | |
338 | |
389 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
339 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
390 | |
340 | |
… | |
… | |
589 | memory. Status is the same as with aio_read. |
539 | memory. Status is the same as with aio_read. |
590 | |
540 | |
591 | =cut |
541 | =cut |
592 | |
542 | |
593 | sub aio_load($$;$) { |
543 | sub aio_load($$;$) { |
594 | aio_block { |
|
|
595 | my ($path, undef, $cb) = @_; |
544 | my ($path, undef, $cb) = @_; |
596 | my $data = \$_[1]; |
545 | my $data = \$_[1]; |
597 | |
546 | |
598 | my $pri = aioreq_pri; |
547 | my $pri = aioreq_pri; |
599 | my $grp = aio_group $cb; |
548 | my $grp = aio_group $cb; |
|
|
549 | |
|
|
550 | aioreq_pri $pri; |
|
|
551 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
552 | my $fh = shift |
|
|
553 | or return $grp->result (-1); |
600 | |
554 | |
601 | aioreq_pri $pri; |
555 | aioreq_pri $pri; |
602 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
603 | my $fh = shift |
|
|
604 | or return $grp->result (-1); |
|
|
605 | |
|
|
606 | aioreq_pri $pri; |
|
|
607 | add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub { |
556 | add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub { |
608 | $grp->result ($_[0]); |
557 | $grp->result ($_[0]); |
609 | }; |
|
|
610 | }; |
558 | }; |
611 | |
|
|
612 | $grp |
|
|
613 | } |
559 | }; |
|
|
560 | |
|
|
561 | $grp |
614 | } |
562 | } |
615 | |
563 | |
616 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
564 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
617 | |
565 | |
618 | Try to copy the I<file> (directories not supported as either source or |
566 | Try to copy the I<file> (directories not supported as either source or |
… | |
… | |
629 | errors are being ignored. |
577 | errors are being ignored. |
630 | |
578 | |
631 | =cut |
579 | =cut |
632 | |
580 | |
633 | sub aio_copy($$;$) { |
581 | sub aio_copy($$;$) { |
634 | aio_block { |
|
|
635 | my ($src, $dst, $cb) = @_; |
582 | my ($src, $dst, $cb) = @_; |
636 | |
583 | |
637 | my $pri = aioreq_pri; |
584 | my $pri = aioreq_pri; |
638 | my $grp = aio_group $cb; |
585 | my $grp = aio_group $cb; |
639 | |
586 | |
640 | aioreq_pri $pri; |
587 | aioreq_pri $pri; |
641 | add $grp aio_open $src, O_RDONLY, 0, sub { |
588 | add $grp aio_open $src, O_RDONLY, 0, sub { |
642 | if (my $src_fh = $_[0]) { |
589 | if (my $src_fh = $_[0]) { |
643 | my @stat = stat $src_fh; |
590 | my @stat = stat $src_fh; |
644 | |
591 | |
645 | aioreq_pri $pri; |
592 | aioreq_pri $pri; |
646 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
593 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
647 | if (my $dst_fh = $_[0]) { |
594 | if (my $dst_fh = $_[0]) { |
648 | aioreq_pri $pri; |
595 | aioreq_pri $pri; |
649 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
596 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
650 | if ($_[0] == $stat[7]) { |
597 | if ($_[0] == $stat[7]) { |
651 | $grp->result (0); |
598 | $grp->result (0); |
652 | close $src_fh; |
599 | close $src_fh; |
653 | |
600 | |
654 | # those should not normally block. should. should. |
601 | # those should not normally block. should. should. |
655 | utime $stat[8], $stat[9], $dst; |
602 | utime $stat[8], $stat[9], $dst; |
656 | chmod $stat[2] & 07777, $dst_fh; |
603 | chmod $stat[2] & 07777, $dst_fh; |
657 | chown $stat[4], $stat[5], $dst_fh; |
604 | chown $stat[4], $stat[5], $dst_fh; |
658 | |
605 | |
659 | aioreq_pri $pri; |
606 | aioreq_pri $pri; |
660 | add $grp aio_close $dst_fh; |
607 | add $grp aio_close $dst_fh; |
661 | } else { |
608 | } else { |
662 | $grp->result (-1); |
609 | $grp->result (-1); |
663 | close $src_fh; |
610 | close $src_fh; |
664 | close $dst_fh; |
611 | close $dst_fh; |
665 | |
612 | |
666 | aioreq $pri; |
613 | aioreq $pri; |
667 | add $grp aio_unlink $dst; |
614 | add $grp aio_unlink $dst; |
668 | } |
|
|
669 | }; |
615 | } |
670 | } else { |
|
|
671 | $grp->result (-1); |
|
|
672 | } |
616 | }; |
|
|
617 | } else { |
|
|
618 | $grp->result (-1); |
673 | }, |
619 | } |
674 | |
|
|
675 | } else { |
|
|
676 | $grp->result (-1); |
|
|
677 | } |
620 | }, |
|
|
621 | |
|
|
622 | } else { |
|
|
623 | $grp->result (-1); |
678 | }; |
624 | } |
679 | |
|
|
680 | $grp |
|
|
681 | } |
625 | }; |
|
|
626 | |
|
|
627 | $grp |
682 | } |
628 | } |
683 | |
629 | |
684 | =item aio_move $srcpath, $dstpath, $callback->($status) |
630 | =item aio_move $srcpath, $dstpath, $callback->($status) |
685 | |
631 | |
686 | Try to move the I<file> (directories not supported as either source or |
632 | Try to move the I<file> (directories not supported as either source or |
… | |
… | |
692 | that is successful, unlinking the C<$srcpath>. |
638 | that is successful, unlinking the C<$srcpath>. |
693 | |
639 | |
694 | =cut |
640 | =cut |
695 | |
641 | |
696 | sub aio_move($$;$) { |
642 | sub aio_move($$;$) { |
697 | aio_block { |
|
|
698 | my ($src, $dst, $cb) = @_; |
643 | my ($src, $dst, $cb) = @_; |
699 | |
644 | |
700 | my $pri = aioreq_pri; |
645 | my $pri = aioreq_pri; |
701 | my $grp = aio_group $cb; |
646 | my $grp = aio_group $cb; |
702 | |
647 | |
703 | aioreq_pri $pri; |
648 | aioreq_pri $pri; |
704 | add $grp aio_rename $src, $dst, sub { |
649 | add $grp aio_rename $src, $dst, sub { |
705 | if ($_[0] && $! == EXDEV) { |
650 | if ($_[0] && $! == EXDEV) { |
706 | aioreq_pri $pri; |
651 | aioreq_pri $pri; |
707 | add $grp aio_copy $src, $dst, sub { |
652 | add $grp aio_copy $src, $dst, sub { |
708 | $grp->result ($_[0]); |
|
|
709 | |
|
|
710 | if (!$_[0]) { |
|
|
711 | aioreq_pri $pri; |
|
|
712 | add $grp aio_unlink $src; |
|
|
713 | } |
|
|
714 | }; |
|
|
715 | } else { |
|
|
716 | $grp->result ($_[0]); |
653 | $grp->result ($_[0]); |
|
|
654 | |
|
|
655 | if (!$_[0]) { |
|
|
656 | aioreq_pri $pri; |
|
|
657 | add $grp aio_unlink $src; |
|
|
658 | } |
717 | } |
659 | }; |
|
|
660 | } else { |
|
|
661 | $grp->result ($_[0]); |
718 | }; |
662 | } |
719 | |
|
|
720 | $grp |
|
|
721 | } |
663 | }; |
|
|
664 | |
|
|
665 | $grp |
722 | } |
666 | } |
723 | |
667 | |
724 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
668 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
725 | |
669 | |
726 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
670 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
… | |
… | |
774 | directory counting heuristic. |
718 | directory counting heuristic. |
775 | |
719 | |
776 | =cut |
720 | =cut |
777 | |
721 | |
778 | sub aio_scandir($$;$) { |
722 | sub aio_scandir($$;$) { |
779 | aio_block { |
|
|
780 | my ($path, $maxreq, $cb) = @_; |
723 | my ($path, $maxreq, $cb) = @_; |
781 | |
724 | |
782 | my $pri = aioreq_pri; |
725 | my $pri = aioreq_pri; |
783 | |
726 | |
784 | my $grp = aio_group $cb; |
727 | my $grp = aio_group $cb; |
785 | |
728 | |
786 | $maxreq = 4 if $maxreq <= 0; |
729 | $maxreq = 4 if $maxreq <= 0; |
787 | |
730 | |
788 | # stat once |
731 | # stat once |
|
|
732 | aioreq_pri $pri; |
|
|
733 | add $grp aio_stat $path, sub { |
|
|
734 | return $grp->result () if $_[0]; |
|
|
735 | my $now = time; |
|
|
736 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
737 | |
|
|
738 | # read the directory entries |
789 | aioreq_pri $pri; |
739 | aioreq_pri $pri; |
790 | add $grp aio_stat $path, sub { |
740 | add $grp aio_readdir $path, sub { |
|
|
741 | my $entries = shift |
791 | return $grp->result () if $_[0]; |
742 | or return $grp->result (); |
792 | my $now = time; |
|
|
793 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
794 | |
743 | |
795 | # read the directory entries |
744 | # stat the dir another time |
796 | aioreq_pri $pri; |
745 | aioreq_pri $pri; |
797 | add $grp aio_readdir $path, sub { |
|
|
798 | my $entries = shift |
|
|
799 | or return $grp->result (); |
|
|
800 | |
|
|
801 | # stat the dir another time |
|
|
802 | aioreq_pri $pri; |
|
|
803 | add $grp aio_stat $path, sub { |
746 | add $grp aio_stat $path, sub { |
804 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
747 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
805 | |
748 | |
806 | my $ndirs; |
749 | my $ndirs; |
807 | |
750 | |
808 | # take the slow route if anything looks fishy |
751 | # take the slow route if anything looks fishy |
809 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
752 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
810 | $ndirs = -1; |
753 | $ndirs = -1; |
811 | } else { |
754 | } else { |
812 | # if nlink == 2, we are finished |
755 | # if nlink == 2, we are finished |
813 | # on non-posix-fs's, we rely on nlink < 2 |
756 | # on non-posix-fs's, we rely on nlink < 2 |
814 | $ndirs = (stat _)[3] - 2 |
757 | $ndirs = (stat _)[3] - 2 |
815 | or return $grp->result ([], $entries); |
758 | or return $grp->result ([], $entries); |
816 | } |
759 | } |
817 | |
760 | |
818 | # sort into likely dirs and likely nondirs |
761 | # sort into likely dirs and likely nondirs |
819 | # dirs == files without ".", short entries first |
762 | # dirs == files without ".", short entries first |
820 | $entries = [map $_->[0], |
763 | $entries = [map $_->[0], |
821 | sort { $b->[1] cmp $a->[1] } |
764 | sort { $b->[1] cmp $a->[1] } |
822 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
765 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
823 | @$entries]; |
766 | @$entries]; |
824 | |
767 | |
825 | my (@dirs, @nondirs); |
768 | my (@dirs, @nondirs); |
826 | |
769 | |
827 | my $statgrp = add $grp aio_group sub { |
770 | my $statgrp = add $grp aio_group sub { |
828 | $grp->result (\@dirs, \@nondirs); |
771 | $grp->result (\@dirs, \@nondirs); |
829 | }; |
772 | }; |
830 | |
773 | |
831 | limit $statgrp $maxreq; |
774 | limit $statgrp $maxreq; |
832 | feed $statgrp sub { |
775 | feed $statgrp sub { |
833 | return unless @$entries; |
776 | return unless @$entries; |
834 | my $entry = pop @$entries; |
777 | my $entry = pop @$entries; |
835 | |
778 | |
836 | aioreq_pri $pri; |
779 | aioreq_pri $pri; |
837 | add $statgrp aio_stat "$path/$entry/.", sub { |
780 | add $statgrp aio_stat "$path/$entry/.", sub { |
838 | if ($_[0] < 0) { |
781 | if ($_[0] < 0) { |
839 | push @nondirs, $entry; |
782 | push @nondirs, $entry; |
840 | } else { |
783 | } else { |
841 | # need to check for real directory |
784 | # need to check for real directory |
842 | aioreq_pri $pri; |
785 | aioreq_pri $pri; |
843 | add $statgrp aio_lstat "$path/$entry", sub { |
786 | add $statgrp aio_lstat "$path/$entry", sub { |
844 | if (-d _) { |
787 | if (-d _) { |
845 | push @dirs, $entry; |
788 | push @dirs, $entry; |
846 | |
789 | |
847 | unless (--$ndirs) { |
790 | unless (--$ndirs) { |
848 | push @nondirs, @$entries; |
791 | push @nondirs, @$entries; |
849 | feed $statgrp; |
792 | feed $statgrp; |
850 | } |
|
|
851 | } else { |
|
|
852 | push @nondirs, $entry; |
|
|
853 | } |
793 | } |
|
|
794 | } else { |
|
|
795 | push @nondirs, $entry; |
854 | } |
796 | } |
855 | } |
797 | } |
856 | }; |
798 | } |
857 | }; |
799 | }; |
858 | }; |
800 | }; |
859 | }; |
801 | }; |
860 | }; |
802 | }; |
861 | |
|
|
862 | $grp |
|
|
863 | } |
803 | }; |
|
|
804 | |
|
|
805 | $grp |
864 | } |
806 | } |
865 | |
807 | |
866 | =item aio_rmtree $path, $callback->($status) |
808 | =item aio_rmtree $path, $callback->($status) |
867 | |
809 | |
868 | Delete a directory tree starting (and including) C<$path>, return the |
810 | Delete a directory tree starting (and including) C<$path>, return the |
… | |
… | |
872 | |
814 | |
873 | =cut |
815 | =cut |
874 | |
816 | |
875 | sub aio_rmtree; |
817 | sub aio_rmtree; |
876 | sub aio_rmtree($;$) { |
818 | sub aio_rmtree($;$) { |
877 | aio_block { |
|
|
878 | my ($path, $cb) = @_; |
819 | my ($path, $cb) = @_; |
879 | |
820 | |
880 | my $pri = aioreq_pri; |
821 | my $pri = aioreq_pri; |
881 | my $grp = aio_group $cb; |
822 | my $grp = aio_group $cb; |
882 | |
823 | |
883 | aioreq_pri $pri; |
824 | aioreq_pri $pri; |
884 | add $grp aio_scandir $path, 0, sub { |
825 | add $grp aio_scandir $path, 0, sub { |
885 | my ($dirs, $nondirs) = @_; |
826 | my ($dirs, $nondirs) = @_; |
886 | |
827 | |
887 | my $dirgrp = aio_group sub { |
828 | my $dirgrp = aio_group sub { |
888 | add $grp aio_rmdir $path, sub { |
829 | add $grp aio_rmdir $path, sub { |
889 | $grp->result ($_[0]); |
830 | $grp->result ($_[0]); |
890 | }; |
|
|
891 | }; |
831 | }; |
892 | |
|
|
893 | (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs; |
|
|
894 | (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs; |
|
|
895 | |
|
|
896 | add $grp $dirgrp; |
|
|
897 | }; |
832 | }; |
898 | |
833 | |
899 | $grp |
834 | (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs; |
|
|
835 | (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs; |
|
|
836 | |
|
|
837 | add $grp $dirgrp; |
900 | } |
838 | }; |
|
|
839 | |
|
|
840 | $grp |
901 | } |
841 | } |
902 | |
842 | |
903 | =item aio_sync $callback->($status) |
843 | =item aio_sync $callback->($status) |
904 | |
844 | |
905 | Asynchronously call sync and call the callback when finished. |
845 | Asynchronously call sync and call the callback when finished. |
… | |
… | |
929 | Passes C<0> when everything went ok, and C<-1> on error. |
869 | Passes C<0> when everything went ok, and C<-1> on error. |
930 | |
870 | |
931 | =cut |
871 | =cut |
932 | |
872 | |
933 | sub aio_pathsync($;$) { |
873 | sub aio_pathsync($;$) { |
934 | aio_block { |
|
|
935 | my ($path, $cb) = @_; |
874 | my ($path, $cb) = @_; |
936 | |
875 | |
937 | my $pri = aioreq_pri; |
876 | my $pri = aioreq_pri; |
938 | my $grp = aio_group $cb; |
877 | my $grp = aio_group $cb; |
939 | |
878 | |
940 | aioreq_pri $pri; |
879 | aioreq_pri $pri; |
941 | add $grp aio_open $path, O_RDONLY, 0, sub { |
880 | add $grp aio_open $path, O_RDONLY, 0, sub { |
942 | my ($fh) = @_; |
881 | my ($fh) = @_; |
943 | if ($fh) { |
882 | if ($fh) { |
|
|
883 | aioreq_pri $pri; |
|
|
884 | add $grp aio_fsync $fh, sub { |
|
|
885 | $grp->result ($_[0]); |
|
|
886 | |
944 | aioreq_pri $pri; |
887 | aioreq_pri $pri; |
945 | add $grp aio_fsync $fh, sub { |
|
|
946 | $grp->result ($_[0]); |
|
|
947 | |
|
|
948 | aioreq_pri $pri; |
|
|
949 | add $grp aio_close $fh; |
888 | add $grp aio_close $fh; |
950 | }; |
|
|
951 | } else { |
|
|
952 | $grp->result (-1); |
|
|
953 | } |
889 | }; |
|
|
890 | } else { |
|
|
891 | $grp->result (-1); |
954 | }; |
892 | } |
955 | |
|
|
956 | $grp |
|
|
957 | } |
893 | }; |
|
|
894 | |
|
|
895 | $grp |
958 | } |
896 | } |
959 | |
897 | |
960 | =item aio_group $callback->(...) |
898 | =item aio_group $callback->(...) |
961 | |
899 | |
962 | This is a very special aio request: Instead of doing something, it is a |
900 | This is a very special aio request: Instead of doing something, it is a |
… | |
… | |
1075 | Their lifetime, simplified, looks like this: when they are empty, they |
1013 | Their lifetime, simplified, looks like this: when they are empty, they |
1076 | will finish very quickly. If they contain only requests that are in the |
1014 | will finish very quickly. If they contain only requests that are in the |
1077 | C<done> state, they will also finish. Otherwise they will continue to |
1015 | C<done> state, they will also finish. Otherwise they will continue to |
1078 | exist. |
1016 | exist. |
1079 | |
1017 | |
1080 | That means after creating a group you have some time to add requests. And |
1018 | That means after creating a group you have some time to add requests |
1081 | in the callbacks of those requests, you can add further requests to the |
1019 | (precisely before the callback has been invoked, which is only done within |
1082 | group. And only when all those requests have finished will the the group |
1020 | the C<poll_cb>). And in the callbacks of those requests, you can add |
1083 | itself finish. |
1021 | further requests to the group. And only when all those requests have |
|
|
1022 | finished will the the group itself finish. |
1084 | |
1023 | |
1085 | =over 4 |
1024 | =over 4 |
1086 | |
1025 | |
1087 | =item add $grp ... |
1026 | =item add $grp ... |
1088 | |
1027 | |
… | |
… | |
1179 | See C<poll_cb> for an example. |
1118 | See C<poll_cb> for an example. |
1180 | |
1119 | |
1181 | =item IO::AIO::poll_cb |
1120 | =item IO::AIO::poll_cb |
1182 | |
1121 | |
1183 | Process some outstanding events on the result pipe. You have to call this |
1122 | Process some outstanding events on the result pipe. You have to call this |
1184 | regularly. Returns the number of events processed. Returns immediately |
1123 | regularly. Returns C<0> if all events could be processed, or C<-1> if it |
|
|
1124 | returned earlier for whatever reason. Returns immediately when no events |
1185 | when no events are outstanding. The amount of events processed depends on |
1125 | are outstanding. The amount of events processed depends on the settings of |
1186 | the settings of C<IO::AIO::max_poll_req> and C<IO::AIO::max_poll_time>. |
1126 | C<IO::AIO::max_poll_req> and C<IO::AIO::max_poll_time>. |
1187 | |
1127 | |
1188 | If not all requests were processed for whatever reason, the filehandle |
1128 | If not all requests were processed for whatever reason, the filehandle |
1189 | will still be ready when C<poll_cb> returns. |
1129 | will still be ready when C<poll_cb> returns, so normally you don't have to |
|
|
1130 | do anything special to have it called later. |
1190 | |
1131 | |
1191 | Example: Install an Event watcher that automatically calls |
1132 | Example: Install an Event watcher that automatically calls |
1192 | IO::AIO::poll_cb with high priority: |
1133 | IO::AIO::poll_cb with high priority: |
1193 | |
1134 | |
1194 | Event->io (fd => IO::AIO::poll_fileno, |
1135 | Event->io (fd => IO::AIO::poll_fileno, |
… | |
… | |
1308 | |
1249 | |
1309 | The default is probably ok in most situations, especially if thread |
1250 | The default is probably ok in most situations, especially if thread |
1310 | creation is fast. If thread creation is very slow on your system you might |
1251 | creation is fast. If thread creation is very slow on your system you might |
1311 | want to use larger values. |
1252 | want to use larger values. |
1312 | |
1253 | |
1313 | =item $oldmaxreqs = IO::AIO::max_outstanding $maxreqs |
1254 | =item IO::AIO::max_outstanding $maxreqs |
1314 | |
1255 | |
1315 | This is a very bad function to use in interactive programs because it |
1256 | This is a very bad function to use in interactive programs because it |
1316 | blocks, and a bad way to reduce concurrency because it is inexact: Better |
1257 | blocks, and a bad way to reduce concurrency because it is inexact: Better |
1317 | use an C<aio_group> together with a feed callback. |
1258 | use an C<aio_group> together with a feed callback. |
1318 | |
1259 | |
… | |
… | |
1323 | |
1264 | |
1324 | The default value is very large, so there is no practical limit on the |
1265 | The default value is very large, so there is no practical limit on the |
1325 | number of outstanding requests. |
1266 | number of outstanding requests. |
1326 | |
1267 | |
1327 | You can still queue as many requests as you want. Therefore, |
1268 | You can still queue as many requests as you want. Therefore, |
1328 | C<max_oustsanding> is mainly useful in simple scripts (with low values) or |
1269 | C<max_outstanding> is mainly useful in simple scripts (with low values) or |
1329 | as a stop gap to shield against fatal memory overflow (with large values). |
1270 | as a stop gap to shield against fatal memory overflow (with large values). |
1330 | |
1271 | |
1331 | =back |
1272 | =back |
1332 | |
1273 | |
1333 | =head3 STATISTICAL INFORMATION |
1274 | =head3 STATISTICAL INFORMATION |
… | |
… | |
1403 | |
1344 | |
1404 | Known bugs will be fixed in the next release. |
1345 | Known bugs will be fixed in the next release. |
1405 | |
1346 | |
1406 | =head1 SEE ALSO |
1347 | =head1 SEE ALSO |
1407 | |
1348 | |
1408 | L<Coro::AIO>. |
1349 | L<AnyEvent::AIO> for easy integration into event loops, L<Coro::AIO> for a |
|
|
1350 | more natural syntax. |
1409 | |
1351 | |
1410 | =head1 AUTHOR |
1352 | =head1 AUTHOR |
1411 | |
1353 | |
1412 | Marc Lehmann <schmorp@schmorp.de> |
1354 | Marc Lehmann <schmorp@schmorp.de> |
1413 | http://home.schmorp.de/ |
1355 | http://home.schmorp.de/ |