… | |
… | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use IO::AIO; |
7 | use IO::AIO; |
8 | |
8 | |
9 | aio_open "/etc/passwd", O_RDONLY, 0, sub { |
9 | aio_open "/etc/passwd", O_RDONLY, 0, sub { |
10 | my ($fh) = @_; |
10 | my $fh = shift |
|
|
11 | or die "/etc/passwd: $!"; |
11 | ... |
12 | ... |
12 | }; |
13 | }; |
13 | |
14 | |
14 | aio_unlink "/tmp/file", sub { }; |
15 | aio_unlink "/tmp/file", sub { }; |
15 | |
16 | |
… | |
… | |
99 | poll => 'r', |
100 | poll => 'r', |
100 | cb => \&IO::AIO::poll_cb); |
101 | cb => \&IO::AIO::poll_cb); |
101 | |
102 | |
102 | # queue the request to open /etc/passwd |
103 | # queue the request to open /etc/passwd |
103 | aio_open "/etc/passwd", O_RDONLY, 0, sub { |
104 | aio_open "/etc/passwd", O_RDONLY, 0, sub { |
104 | my $fh = $_[0] |
105 | my $fh = shift |
105 | or die "error while opening: $!"; |
106 | or die "error while opening: $!"; |
106 | |
107 | |
107 | # stat'ing filehandles is generally non-blocking |
108 | # stat'ing filehandles is generally non-blocking |
108 | my $size = -s $fh; |
109 | my $size = -s $fh; |
109 | |
110 | |
… | |
… | |
189 | use strict 'vars'; |
190 | use strict 'vars'; |
190 | |
191 | |
191 | use base 'Exporter'; |
192 | use base 'Exporter'; |
192 | |
193 | |
193 | BEGIN { |
194 | BEGIN { |
194 | our $VERSION = '2.2'; |
195 | our $VERSION = '2.32'; |
195 | |
196 | |
196 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat |
197 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat |
197 | aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink |
198 | aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink |
198 | aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link |
199 | aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link |
199 | aio_move aio_copy aio_group aio_nop aio_mknod); |
200 | aio_move aio_copy aio_group aio_nop aio_mknod aio_load aio_rmtree aio_mkdir); |
200 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); |
201 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block)); |
201 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
202 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
202 | min_parallel max_parallel max_idle |
203 | min_parallel max_parallel max_idle |
203 | nreqs nready npending nthreads |
204 | nreqs nready npending nthreads |
204 | max_poll_time max_poll_reqs); |
205 | max_poll_time max_poll_reqs); |
205 | |
206 | |
… | |
… | |
289 | list. They are the same as used by C<sysopen>. |
290 | list. They are the same as used by C<sysopen>. |
290 | |
291 | |
291 | Likewise, C<$mode> specifies the mode of the newly created file, if it |
292 | Likewise, C<$mode> specifies the mode of the newly created file, if it |
292 | didn't exist and C<O_CREAT> has been given, just like perl's C<sysopen>, |
293 | didn't exist and C<O_CREAT> has been given, just like perl's C<sysopen>, |
293 | except that it is mandatory (i.e. use C<0> if you don't create new files, |
294 | except that it is mandatory (i.e. use C<0> if you don't create new files, |
294 | and C<0666> or C<0777> if you do). |
295 | and C<0666> or C<0777> if you do). Note that the C<$mode> will be modified |
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|
296 | by the umask in effect then the request is being executed, so better never |
|
|
297 | change the umask. |
295 | |
298 | |
296 | Example: |
299 | Example: |
297 | |
300 | |
298 | aio_open "/etc/passwd", O_RDONLY, 0, sub { |
301 | aio_open "/etc/passwd", O_RDONLY, 0, sub { |
299 | if ($_[0]) { |
302 | if ($_[0]) { |
… | |
… | |
429 | =item aio_rename $srcpath, $dstpath, $callback->($status) |
432 | =item aio_rename $srcpath, $dstpath, $callback->($status) |
430 | |
433 | |
431 | Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as |
434 | Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as |
432 | rename(2) and call the callback with the result code. |
435 | rename(2) and call the callback with the result code. |
433 | |
436 | |
|
|
437 | =item aio_mkdir $pathname, $mode, $callback->($status) |
|
|
438 | |
|
|
439 | Asynchronously mkdir (create) a directory and call the callback with |
|
|
440 | the result code. C<$mode> will be modified by the umask at the time the |
|
|
441 | request is executed, so do not change your umask. |
|
|
442 | |
434 | =item aio_rmdir $pathname, $callback->($status) |
443 | =item aio_rmdir $pathname, $callback->($status) |
435 | |
444 | |
436 | Asynchronously rmdir (delete) a directory and call the callback with the |
445 | Asynchronously rmdir (delete) a directory and call the callback with the |
437 | result code. |
446 | result code. |
438 | |
447 | |
… | |
… | |
442 | directory (i.e. opendir + readdir + closedir). The entries will not be |
451 | directory (i.e. opendir + readdir + closedir). The entries will not be |
443 | sorted, and will B<NOT> include the C<.> and C<..> entries. |
452 | sorted, and will B<NOT> include the C<.> and C<..> entries. |
444 | |
453 | |
445 | The callback a single argument which is either C<undef> or an array-ref |
454 | The callback a single argument which is either C<undef> or an array-ref |
446 | with the filenames. |
455 | with the filenames. |
|
|
456 | |
|
|
457 | =item aio_load $path, $data, $callback->($status) |
|
|
458 | |
|
|
459 | This is a composite request that tries to fully load the given file into |
|
|
460 | memory. Status is the same as with aio_read. |
|
|
461 | |
|
|
462 | =cut |
|
|
463 | |
|
|
464 | sub aio_load($$;$) { |
|
|
465 | aio_block { |
|
|
466 | my ($path, undef, $cb) = @_; |
|
|
467 | my $data = \$_[1]; |
|
|
468 | |
|
|
469 | my $pri = aioreq_pri; |
|
|
470 | my $grp = aio_group $cb; |
|
|
471 | |
|
|
472 | aioreq_pri $pri; |
|
|
473 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
474 | my ($fh) = @_ |
|
|
475 | or return $grp->result (-1); |
|
|
476 | |
|
|
477 | aioreq_pri $pri; |
|
|
478 | add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub { |
|
|
479 | $grp->result ($_[0]); |
|
|
480 | }; |
|
|
481 | }; |
|
|
482 | |
|
|
483 | $grp |
|
|
484 | } |
|
|
485 | } |
447 | |
486 | |
448 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
487 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
449 | |
488 | |
450 | Try to copy the I<file> (directories not supported as either source or |
489 | Try to copy the I<file> (directories not supported as either source or |
451 | destination) from C<$srcpath> to C<$dstpath> and call the callback with |
490 | destination) from C<$srcpath> to C<$dstpath> and call the callback with |
… | |
… | |
461 | errors are being ignored. |
500 | errors are being ignored. |
462 | |
501 | |
463 | =cut |
502 | =cut |
464 | |
503 | |
465 | sub aio_copy($$;$) { |
504 | sub aio_copy($$;$) { |
|
|
505 | aio_block { |
466 | my ($src, $dst, $cb) = @_; |
506 | my ($src, $dst, $cb) = @_; |
467 | |
507 | |
468 | my $pri = aioreq_pri; |
508 | my $pri = aioreq_pri; |
469 | my $grp = aio_group $cb; |
509 | my $grp = aio_group $cb; |
470 | |
510 | |
471 | aioreq_pri $pri; |
511 | aioreq_pri $pri; |
472 | add $grp aio_open $src, O_RDONLY, 0, sub { |
512 | add $grp aio_open $src, O_RDONLY, 0, sub { |
473 | if (my $src_fh = $_[0]) { |
513 | if (my $src_fh = $_[0]) { |
474 | my @stat = stat $src_fh; |
514 | my @stat = stat $src_fh; |
475 | |
515 | |
476 | aioreq_pri $pri; |
516 | aioreq_pri $pri; |
477 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
517 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
478 | if (my $dst_fh = $_[0]) { |
518 | if (my $dst_fh = $_[0]) { |
479 | aioreq_pri $pri; |
519 | aioreq_pri $pri; |
480 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
520 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
481 | if ($_[0] == $stat[7]) { |
521 | if ($_[0] == $stat[7]) { |
482 | $grp->result (0); |
522 | $grp->result (0); |
483 | close $src_fh; |
523 | close $src_fh; |
484 | |
524 | |
485 | # those should not normally block. should. should. |
525 | # those should not normally block. should. should. |
486 | utime $stat[8], $stat[9], $dst; |
526 | utime $stat[8], $stat[9], $dst; |
487 | chmod $stat[2] & 07777, $dst_fh; |
527 | chmod $stat[2] & 07777, $dst_fh; |
488 | chown $stat[4], $stat[5], $dst_fh; |
528 | chown $stat[4], $stat[5], $dst_fh; |
489 | close $dst_fh; |
529 | close $dst_fh; |
490 | } else { |
530 | } else { |
491 | $grp->result (-1); |
531 | $grp->result (-1); |
492 | close $src_fh; |
532 | close $src_fh; |
493 | close $dst_fh; |
533 | close $dst_fh; |
494 | |
534 | |
495 | aioreq $pri; |
535 | aioreq $pri; |
496 | add $grp aio_unlink $dst; |
536 | add $grp aio_unlink $dst; |
|
|
537 | } |
497 | } |
538 | }; |
|
|
539 | } else { |
|
|
540 | $grp->result (-1); |
498 | }; |
541 | } |
499 | } else { |
|
|
500 | $grp->result (-1); |
|
|
501 | } |
542 | }, |
|
|
543 | |
|
|
544 | } else { |
|
|
545 | $grp->result (-1); |
502 | }, |
546 | } |
503 | |
|
|
504 | } else { |
|
|
505 | $grp->result (-1); |
|
|
506 | } |
547 | }; |
|
|
548 | |
|
|
549 | $grp |
507 | }; |
550 | } |
508 | |
|
|
509 | $grp |
|
|
510 | } |
551 | } |
511 | |
552 | |
512 | =item aio_move $srcpath, $dstpath, $callback->($status) |
553 | =item aio_move $srcpath, $dstpath, $callback->($status) |
513 | |
554 | |
514 | Try to move the I<file> (directories not supported as either source or |
555 | Try to move the I<file> (directories not supported as either source or |
… | |
… | |
520 | that is successful, unlinking the C<$srcpath>. |
561 | that is successful, unlinking the C<$srcpath>. |
521 | |
562 | |
522 | =cut |
563 | =cut |
523 | |
564 | |
524 | sub aio_move($$;$) { |
565 | sub aio_move($$;$) { |
|
|
566 | aio_block { |
525 | my ($src, $dst, $cb) = @_; |
567 | my ($src, $dst, $cb) = @_; |
526 | |
568 | |
527 | my $pri = aioreq_pri; |
569 | my $pri = aioreq_pri; |
528 | my $grp = aio_group $cb; |
570 | my $grp = aio_group $cb; |
529 | |
571 | |
530 | aioreq_pri $pri; |
572 | aioreq_pri $pri; |
531 | add $grp aio_rename $src, $dst, sub { |
573 | add $grp aio_rename $src, $dst, sub { |
532 | if ($_[0] && $! == EXDEV) { |
574 | if ($_[0] && $! == EXDEV) { |
533 | aioreq_pri $pri; |
575 | aioreq_pri $pri; |
534 | add $grp aio_copy $src, $dst, sub { |
576 | add $grp aio_copy $src, $dst, sub { |
|
|
577 | $grp->result ($_[0]); |
|
|
578 | |
|
|
579 | if (!$_[0]) { |
|
|
580 | aioreq_pri $pri; |
|
|
581 | add $grp aio_unlink $src; |
|
|
582 | } |
|
|
583 | }; |
|
|
584 | } else { |
535 | $grp->result ($_[0]); |
585 | $grp->result ($_[0]); |
536 | |
|
|
537 | if (!$_[0]) { |
|
|
538 | aioreq_pri $pri; |
|
|
539 | add $grp aio_unlink $src; |
|
|
540 | } |
|
|
541 | }; |
586 | } |
542 | } else { |
|
|
543 | $grp->result ($_[0]); |
|
|
544 | } |
587 | }; |
|
|
588 | |
|
|
589 | $grp |
545 | }; |
590 | } |
546 | |
|
|
547 | $grp |
|
|
548 | } |
591 | } |
549 | |
592 | |
550 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
593 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
551 | |
594 | |
552 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
595 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
… | |
… | |
599 | as those tend to return 0 or 1 as link counts, which disables the |
642 | as those tend to return 0 or 1 as link counts, which disables the |
600 | directory counting heuristic. |
643 | directory counting heuristic. |
601 | |
644 | |
602 | =cut |
645 | =cut |
603 | |
646 | |
604 | sub aio_scandir($$$) { |
647 | sub aio_scandir($$;$) { |
|
|
648 | aio_block { |
605 | my ($path, $maxreq, $cb) = @_; |
649 | my ($path, $maxreq, $cb) = @_; |
606 | |
650 | |
607 | my $pri = aioreq_pri; |
651 | my $pri = aioreq_pri; |
608 | |
652 | |
609 | my $grp = aio_group $cb; |
653 | my $grp = aio_group $cb; |
610 | |
654 | |
611 | $maxreq = 4 if $maxreq <= 0; |
655 | $maxreq = 4 if $maxreq <= 0; |
612 | |
656 | |
613 | # stat once |
657 | # stat once |
614 | aioreq_pri $pri; |
|
|
615 | add $grp aio_stat $path, sub { |
|
|
616 | return $grp->result () if $_[0]; |
|
|
617 | my $now = time; |
|
|
618 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
619 | |
|
|
620 | # read the directory entries |
|
|
621 | aioreq_pri $pri; |
658 | aioreq_pri $pri; |
622 | add $grp aio_readdir $path, sub { |
659 | add $grp aio_stat $path, sub { |
623 | my $entries = shift |
|
|
624 | or return $grp->result (); |
660 | return $grp->result () if $_[0]; |
|
|
661 | my $now = time; |
|
|
662 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
625 | |
663 | |
626 | # stat the dir another time |
664 | # read the directory entries |
627 | aioreq_pri $pri; |
665 | aioreq_pri $pri; |
|
|
666 | add $grp aio_readdir $path, sub { |
|
|
667 | my $entries = shift |
|
|
668 | or return $grp->result (); |
|
|
669 | |
|
|
670 | # stat the dir another time |
|
|
671 | aioreq_pri $pri; |
628 | add $grp aio_stat $path, sub { |
672 | add $grp aio_stat $path, sub { |
629 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
673 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
630 | |
674 | |
631 | my $ndirs; |
675 | my $ndirs; |
632 | |
676 | |
633 | # take the slow route if anything looks fishy |
677 | # take the slow route if anything looks fishy |
634 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
678 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
635 | $ndirs = -1; |
679 | $ndirs = -1; |
636 | } else { |
680 | } else { |
637 | # if nlink == 2, we are finished |
681 | # if nlink == 2, we are finished |
638 | # on non-posix-fs's, we rely on nlink < 2 |
682 | # on non-posix-fs's, we rely on nlink < 2 |
639 | $ndirs = (stat _)[3] - 2 |
683 | $ndirs = (stat _)[3] - 2 |
640 | or return $grp->result ([], $entries); |
684 | or return $grp->result ([], $entries); |
641 | } |
685 | } |
642 | |
686 | |
643 | # sort into likely dirs and likely nondirs |
687 | # sort into likely dirs and likely nondirs |
644 | # dirs == files without ".", short entries first |
688 | # dirs == files without ".", short entries first |
645 | $entries = [map $_->[0], |
689 | $entries = [map $_->[0], |
646 | sort { $b->[1] cmp $a->[1] } |
690 | sort { $b->[1] cmp $a->[1] } |
647 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
691 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
648 | @$entries]; |
692 | @$entries]; |
649 | |
693 | |
650 | my (@dirs, @nondirs); |
694 | my (@dirs, @nondirs); |
651 | |
695 | |
652 | my $statgrp = add $grp aio_group sub { |
696 | my $statgrp = add $grp aio_group sub { |
653 | $grp->result (\@dirs, \@nondirs); |
697 | $grp->result (\@dirs, \@nondirs); |
654 | }; |
698 | }; |
655 | |
699 | |
656 | limit $statgrp $maxreq; |
700 | limit $statgrp $maxreq; |
657 | feed $statgrp sub { |
701 | feed $statgrp sub { |
658 | return unless @$entries; |
702 | return unless @$entries; |
659 | my $entry = pop @$entries; |
703 | my $entry = pop @$entries; |
660 | |
704 | |
661 | aioreq_pri $pri; |
705 | aioreq_pri $pri; |
662 | add $statgrp aio_stat "$path/$entry/.", sub { |
706 | add $statgrp aio_stat "$path/$entry/.", sub { |
663 | if ($_[0] < 0) { |
707 | if ($_[0] < 0) { |
664 | push @nondirs, $entry; |
708 | push @nondirs, $entry; |
665 | } else { |
709 | } else { |
666 | # need to check for real directory |
710 | # need to check for real directory |
667 | aioreq_pri $pri; |
711 | aioreq_pri $pri; |
668 | add $statgrp aio_lstat "$path/$entry", sub { |
712 | add $statgrp aio_lstat "$path/$entry", sub { |
669 | if (-d _) { |
713 | if (-d _) { |
670 | push @dirs, $entry; |
714 | push @dirs, $entry; |
671 | |
715 | |
672 | unless (--$ndirs) { |
716 | unless (--$ndirs) { |
673 | push @nondirs, @$entries; |
717 | push @nondirs, @$entries; |
674 | feed $statgrp; |
718 | feed $statgrp; |
|
|
719 | } |
|
|
720 | } else { |
|
|
721 | push @nondirs, $entry; |
675 | } |
722 | } |
676 | } else { |
|
|
677 | push @nondirs, $entry; |
|
|
678 | } |
723 | } |
679 | } |
724 | } |
680 | } |
725 | }; |
681 | }; |
726 | }; |
682 | }; |
727 | }; |
683 | }; |
728 | }; |
684 | }; |
729 | }; |
|
|
730 | |
|
|
731 | $grp |
685 | }; |
732 | } |
|
|
733 | } |
686 | |
734 | |
|
|
735 | =item aio_rmtree $path, $callback->($status) |
|
|
736 | |
|
|
737 | Delete a directory tree starting (and including) C<$path>, return the |
|
|
738 | status of the final C<rmdir> only. This is a composite request that |
|
|
739 | uses C<aio_scandir> to recurse into and rmdir directories, and unlink |
|
|
740 | everything else. |
|
|
741 | |
|
|
742 | =cut |
|
|
743 | |
|
|
744 | sub aio_rmtree; |
|
|
745 | sub aio_rmtree($;$) { |
|
|
746 | aio_block { |
|
|
747 | my ($path, $cb) = @_; |
|
|
748 | |
|
|
749 | my $pri = aioreq_pri; |
|
|
750 | my $grp = aio_group $cb; |
|
|
751 | |
|
|
752 | aioreq_pri $pri; |
|
|
753 | add $grp aio_scandir $path, 0, sub { |
|
|
754 | my ($dirs, $nondirs) = @_; |
|
|
755 | |
|
|
756 | my $dirgrp = aio_group sub { |
|
|
757 | add $grp aio_rmdir $path, sub { |
|
|
758 | $grp->result ($_[0]); |
|
|
759 | }; |
|
|
760 | }; |
|
|
761 | |
|
|
762 | (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs; |
|
|
763 | (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs; |
|
|
764 | |
|
|
765 | add $grp $dirgrp; |
|
|
766 | }; |
|
|
767 | |
687 | $grp |
768 | $grp |
|
|
769 | } |
688 | } |
770 | } |
689 | |
771 | |
690 | =item aio_fsync $fh, $callback->($status) |
772 | =item aio_fsync $fh, $callback->($status) |
691 | |
773 | |
692 | Asynchronously call fsync on the given filehandle and call the callback |
774 | Asynchronously call fsync on the given filehandle and call the callback |
… | |
… | |
971 | poll => 'r', nice => 1, |
1053 | poll => 'r', nice => 1, |
972 | cb => &IO::AIO::poll_cb); |
1054 | cb => &IO::AIO::poll_cb); |
973 | |
1055 | |
974 | =item IO::AIO::poll_wait |
1056 | =item IO::AIO::poll_wait |
975 | |
1057 | |
|
|
1058 | If there are any outstanding requests and none of them in the result |
976 | Wait till the result filehandle becomes ready for reading (simply does a |
1059 | phase, wait till the result filehandle becomes ready for reading (simply |
977 | C<select> on the filehandle. This is useful if you want to synchronously |
1060 | does a C<select> on the filehandle. This is useful if you want to |
978 | wait for some requests to finish). |
1061 | synchronously wait for some requests to finish). |
979 | |
1062 | |
980 | See C<nreqs> for an example. |
1063 | See C<nreqs> for an example. |
981 | |
1064 | |
982 | =item IO::AIO::poll |
1065 | =item IO::AIO::poll |
983 | |
1066 | |
984 | Waits until some requests have been handled. |
1067 | Waits until some requests have been handled. |
985 | |
1068 | |
|
|
1069 | Returns the number of requests processed, but is otherwise strictly |
986 | Strictly equivalent to: |
1070 | equivalent to: |
987 | |
1071 | |
988 | IO::AIO::poll_wait, IO::AIO::poll_cb |
1072 | IO::AIO::poll_wait, IO::AIO::poll_cb |
989 | if IO::AIO::nreqs; |
|
|
990 | |
1073 | |
991 | =item IO::AIO::flush |
1074 | =item IO::AIO::flush |
992 | |
1075 | |
993 | Wait till all outstanding AIO requests have been handled. |
1076 | Wait till all outstanding AIO requests have been handled. |
994 | |
1077 | |
… | |
… | |
1108 | *$sym |
1191 | *$sym |
1109 | } |
1192 | } |
1110 | |
1193 | |
1111 | min_parallel 8; |
1194 | min_parallel 8; |
1112 | |
1195 | |
1113 | END { |
1196 | END { flush } |
1114 | min_parallel 1; |
|
|
1115 | flush; |
|
|
1116 | }; |
|
|
1117 | |
1197 | |
1118 | 1; |
1198 | 1; |
1119 | |
1199 | |
1120 | =head2 FORK BEHAVIOUR |
1200 | =head2 FORK BEHAVIOUR |
1121 | |
1201 | |