… | |
… | |
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, POE, urxvt, pureperl...) |
|
|
32 | use AnyEvent::AIO; |
|
|
33 | |
31 | # AnyEvent integration |
34 | # EV integration |
32 | open my $fh, "<&=" . IO::AIO::poll_fileno or die "$!"; |
35 | my $w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb; |
33 | my $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { IO::AIO::poll_cb }); |
|
|
34 | |
36 | |
35 | # Event integration |
37 | # Event integration |
36 | Event->io (fd => IO::AIO::poll_fileno, |
38 | Event->io (fd => IO::AIO::poll_fileno, |
37 | poll => 'r', |
39 | poll => 'r', |
38 | cb => \&IO::AIO::poll_cb); |
40 | cb => \&IO::AIO::poll_cb); |
… | |
… | |
183 | |
185 | |
184 | =cut |
186 | =cut |
185 | |
187 | |
186 | package IO::AIO; |
188 | package IO::AIO; |
187 | |
189 | |
|
|
190 | use Carp (); |
|
|
191 | |
188 | no warnings; |
192 | no warnings; |
189 | use strict 'vars'; |
193 | use strict 'vars'; |
190 | |
194 | |
191 | use base 'Exporter'; |
195 | use base 'Exporter'; |
192 | |
196 | |
193 | BEGIN { |
197 | BEGIN { |
194 | our $VERSION = '2.4'; |
198 | our $VERSION = '3.22'; |
195 | |
199 | |
196 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat |
200 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
197 | aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink |
201 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
198 | aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link |
202 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
|
|
203 | aio_fdatasync aio_sync_file_range aio_pathsync aio_readahead |
|
|
204 | aio_rename aio_link aio_move aio_copy aio_group |
199 | aio_move aio_copy aio_group aio_nop aio_mknod aio_load aio_rmtree aio_mkdir |
205 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
200 | aio_chown aio_chmod aio_utime aio_truncate); |
206 | aio_chmod aio_utime aio_truncate); |
|
|
207 | |
201 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block)); |
208 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); |
202 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
209 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
203 | min_parallel max_parallel max_idle |
210 | min_parallel max_parallel max_idle |
204 | nreqs nready npending nthreads |
211 | nreqs nready npending nthreads |
205 | max_poll_time max_poll_reqs); |
212 | max_poll_time max_poll_reqs); |
|
|
213 | |
|
|
214 | push @AIO_REQ, qw(aio_busy); # not exported |
206 | |
215 | |
207 | @IO::AIO::GRP::ISA = 'IO::AIO::REQ'; |
216 | @IO::AIO::GRP::ISA = 'IO::AIO::REQ'; |
208 | |
217 | |
209 | require XSLoader; |
218 | require XSLoader; |
210 | XSLoader::load ("IO::AIO", $VERSION); |
219 | XSLoader::load ("IO::AIO", $VERSION); |
… | |
… | |
217 | All the C<aio_*> calls are more or less thin wrappers around the syscall |
226 | All the C<aio_*> calls are more or less thin wrappers around the syscall |
218 | with the same name (sans C<aio_>). The arguments are similar or identical, |
227 | with the same name (sans C<aio_>). The arguments are similar or identical, |
219 | and they all accept an additional (and optional) C<$callback> argument |
228 | and they all accept an additional (and optional) C<$callback> argument |
220 | which must be a code reference. This code reference will get called with |
229 | which must be a code reference. This code reference will get called with |
221 | the syscall return code (e.g. most syscalls return C<-1> on error, unlike |
230 | the syscall return code (e.g. most syscalls return C<-1> on error, unlike |
222 | perl, which usually delivers "false") as it's sole argument when the given |
231 | perl, which usually delivers "false") as its sole argument after the given |
223 | syscall has been executed asynchronously. |
232 | syscall has been executed asynchronously. |
224 | |
233 | |
225 | All functions expecting a filehandle keep a copy of the filehandle |
234 | All functions expecting a filehandle keep a copy of the filehandle |
226 | internally until the request has finished. |
235 | internally until the request has finished. |
227 | |
236 | |
… | |
… | |
241 | your pathnames to the locale (or other) encoding in effect in the user |
250 | your pathnames to the locale (or other) encoding in effect in the user |
242 | environment, d) use Glib::filename_from_unicode on unicode filenames or e) |
251 | environment, d) use Glib::filename_from_unicode on unicode filenames or e) |
243 | use something else to ensure your scalar has the correct contents. |
252 | use something else to ensure your scalar has the correct contents. |
244 | |
253 | |
245 | This works, btw. independent of the internal UTF-8 bit, which IO::AIO |
254 | This works, btw. independent of the internal UTF-8 bit, which IO::AIO |
246 | handles correctly wether it is set or not. |
255 | handles correctly whether it is set or not. |
247 | |
256 | |
248 | =over 4 |
257 | =over 4 |
249 | |
258 | |
250 | =item $prev_pri = aioreq_pri [$pri] |
259 | =item $prev_pri = aioreq_pri [$pri] |
251 | |
260 | |
… | |
… | |
311 | |
320 | |
312 | |
321 | |
313 | =item aio_close $fh, $callback->($status) |
322 | =item aio_close $fh, $callback->($status) |
314 | |
323 | |
315 | Asynchronously close a file and call the callback with the result |
324 | Asynchronously close a file and call the callback with the result |
316 | code. I<WARNING:> although accepted, you should not pass in a perl |
325 | code. |
317 | filehandle here, as perl will likely close the file descriptor another |
|
|
318 | time when the filehandle is destroyed. Normally, you can safely call perls |
|
|
319 | C<close> or just let filehandles go out of scope. |
|
|
320 | |
326 | |
321 | This is supposed to be a bug in the API, so that might change. It's |
327 | Unfortunately, you can't do this to perl. Perl I<insists> very strongly on |
322 | therefore best to avoid this function. |
328 | closing the file descriptor associated with the filehandle itself. |
323 | |
329 | |
|
|
330 | Therefore, C<aio_close> will not close the filehandle - instead it will |
|
|
331 | use dup2 to overwrite the file descriptor with the write-end of a pipe |
|
|
332 | (the pipe fd will be created on demand and will be cached). |
|
|
333 | |
|
|
334 | Or in other words: the file descriptor will be closed, but it will not be |
|
|
335 | free for reuse until the perl filehandle is closed. |
|
|
336 | |
|
|
337 | =cut |
324 | |
338 | |
325 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
339 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
326 | |
340 | |
327 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
341 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
328 | |
342 | |
329 | Reads or writes C<$length> bytes from the specified C<$fh> and C<$offset> |
343 | Reads or writes C<$length> bytes from or to the specified C<$fh> and |
330 | into the scalar given by C<$data> and offset C<$dataoffset> and calls the |
344 | C<$offset> into the scalar given by C<$data> and offset C<$dataoffset> |
331 | callback without the actual number of bytes read (or -1 on error, just |
345 | and calls the callback without the actual number of bytes read (or -1 on |
332 | like the syscall). |
346 | error, just like the syscall). |
|
|
347 | |
|
|
348 | C<aio_read> will, like C<sysread>, shrink or grow the C<$data> scalar to |
|
|
349 | offset plus the actual number of bytes read. |
333 | |
350 | |
334 | If C<$offset> is undefined, then the current file descriptor offset will |
351 | If C<$offset> is undefined, then the current file descriptor offset will |
335 | be used (and updated), otherwise the file descriptor offset will not be |
352 | be used (and updated), otherwise the file descriptor offset will not be |
336 | changed by these calls. |
353 | changed by these calls. |
337 | |
354 | |
338 | If C<$length> is undefined in C<aio_write>, use the remaining length of C<$data>. |
355 | If C<$length> is undefined in C<aio_write>, use the remaining length of |
|
|
356 | C<$data>. |
339 | |
357 | |
340 | If C<$dataoffset> is less than zero, it will be counted from the end of |
358 | If C<$dataoffset> is less than zero, it will be counted from the end of |
341 | C<$data>. |
359 | C<$data>. |
342 | |
360 | |
343 | The C<$data> scalar I<MUST NOT> be modified in any way while the request |
361 | The C<$data> scalar I<MUST NOT> be modified in any way while the request |
… | |
… | |
515 | |
533 | |
516 | Unlike the POSIX call of the same name, C<aio_readdir> reads an entire |
534 | Unlike the POSIX call of the same name, C<aio_readdir> reads an entire |
517 | directory (i.e. opendir + readdir + closedir). The entries will not be |
535 | directory (i.e. opendir + readdir + closedir). The entries will not be |
518 | sorted, and will B<NOT> include the C<.> and C<..> entries. |
536 | sorted, and will B<NOT> include the C<.> and C<..> entries. |
519 | |
537 | |
520 | The callback a single argument which is either C<undef> or an array-ref |
538 | The callback is passed a single argument which is either C<undef> or an |
521 | with the filenames. |
539 | array-ref with the filenames. |
|
|
540 | |
|
|
541 | |
|
|
542 | =item aio_readdirx $pathname, $flags, $callback->($entries, $flags) |
|
|
543 | |
|
|
544 | Quite similar to C<aio_readdir>, but the C<$flags> argument allows to tune |
|
|
545 | behaviour and output format. In case of an error, C<$entries> will be |
|
|
546 | C<undef>. |
|
|
547 | |
|
|
548 | The flags are a combination of the following constants, ORed together (the |
|
|
549 | flags will also be passed to the callback, possibly modified): |
|
|
550 | |
|
|
551 | =over 4 |
|
|
552 | |
|
|
553 | =item IO::AIO::READDIR_DENTS |
|
|
554 | |
|
|
555 | When this flag is off, then the callback gets an arrayref with of names |
|
|
556 | only (as with C<aio_readdir>), otherwise it gets an arrayref with |
|
|
557 | C<[$name, $type, $inode]> arrayrefs, each describing a single directory |
|
|
558 | entry in more detail. |
|
|
559 | |
|
|
560 | C<$name> is the name of the entry. |
|
|
561 | |
|
|
562 | C<$type> is one of the C<IO::AIO::DT_xxx> constants: |
|
|
563 | |
|
|
564 | C<IO::AIO::DT_UNKNOWN>, C<IO::AIO::DT_FIFO>, C<IO::AIO::DT_CHR>, C<IO::AIO::DT_DIR>, |
|
|
565 | C<IO::AIO::DT_BLK>, C<IO::AIO::DT_REG>, C<IO::AIO::DT_LNK>, C<IO::AIO::DT_SOCK>, |
|
|
566 | C<IO::AIO::DT_WHT>. |
|
|
567 | |
|
|
568 | C<IO::AIO::DT_UNKNOWN> means just that: readdir does not know. If you need to |
|
|
569 | know, you have to run stat yourself. Also, for speed reasons, the C<$type> |
|
|
570 | scalars are read-only: you can not modify them. |
|
|
571 | |
|
|
572 | C<$inode> is the inode number (which might not be exact on systems with 64 |
|
|
573 | bit inode numbers and 32 bit perls). On systems that do not deliver the |
|
|
574 | inode information, this will always be zero. |
|
|
575 | |
|
|
576 | =item IO::AIO::READDIR_DIRS_FIRST |
|
|
577 | |
|
|
578 | When this flag is set, then the names will be returned in an order where |
|
|
579 | likely directories come first. This is useful when you need to quickly |
|
|
580 | find directories, or you want to find all directories while avoiding to |
|
|
581 | stat() each entry. |
|
|
582 | |
|
|
583 | If the system returns type information in readdir, then this is used |
|
|
584 | to find directories directly. Otherwise, likely directories are files |
|
|
585 | beginning with ".", or otherwise files with no dots, of which files with |
|
|
586 | short names are tried first. |
|
|
587 | |
|
|
588 | =item IO::AIO::READDIR_STAT_ORDER |
|
|
589 | |
|
|
590 | When this flag is set, then the names will be returned in an order |
|
|
591 | suitable for stat()'ing each one. That is, when you plan to stat() |
|
|
592 | all files in the given directory, then the returned order will likely |
|
|
593 | be fastest. |
|
|
594 | |
|
|
595 | If both this flag and C<IO::AIO::READDIR_DIRS_FIRST> are specified, then |
|
|
596 | the likely dirs come first, resulting in a less optimal stat order. |
|
|
597 | |
|
|
598 | =item IO::AIO::READDIR_FOUND_UNKNOWN |
|
|
599 | |
|
|
600 | This flag should not be set when calling C<aio_readdirx>. Instead, it |
|
|
601 | is being set by C<aio_readdirx>, when any of the C<$type>'s found were |
|
|
602 | C<IO::AIO::DT_UNKNOWN>. The absense of this flag therefore indicates that all |
|
|
603 | C<$type>'s are known, which can be used to speed up some algorithms. |
|
|
604 | |
|
|
605 | =back |
522 | |
606 | |
523 | |
607 | |
524 | =item aio_load $path, $data, $callback->($status) |
608 | =item aio_load $path, $data, $callback->($status) |
525 | |
609 | |
526 | This is a composite request that tries to fully load the given file into |
610 | This is a composite request that tries to fully load the given file into |
527 | memory. Status is the same as with aio_read. |
611 | memory. Status is the same as with aio_read. |
528 | |
612 | |
529 | =cut |
613 | =cut |
530 | |
614 | |
531 | sub aio_load($$;$) { |
615 | sub aio_load($$;$) { |
532 | aio_block { |
|
|
533 | my ($path, undef, $cb) = @_; |
616 | my ($path, undef, $cb) = @_; |
534 | my $data = \$_[1]; |
617 | my $data = \$_[1]; |
535 | |
618 | |
536 | my $pri = aioreq_pri; |
619 | my $pri = aioreq_pri; |
537 | my $grp = aio_group $cb; |
620 | my $grp = aio_group $cb; |
|
|
621 | |
|
|
622 | aioreq_pri $pri; |
|
|
623 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
624 | my $fh = shift |
|
|
625 | or return $grp->result (-1); |
538 | |
626 | |
539 | aioreq_pri $pri; |
627 | aioreq_pri $pri; |
540 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
541 | my $fh = shift |
|
|
542 | or return $grp->result (-1); |
|
|
543 | |
|
|
544 | aioreq_pri $pri; |
|
|
545 | add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub { |
628 | add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub { |
546 | $grp->result ($_[0]); |
629 | $grp->result ($_[0]); |
547 | }; |
|
|
548 | }; |
630 | }; |
549 | |
|
|
550 | $grp |
|
|
551 | } |
631 | }; |
|
|
632 | |
|
|
633 | $grp |
552 | } |
634 | } |
553 | |
635 | |
554 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
636 | =item aio_copy $srcpath, $dstpath, $callback->($status) |
555 | |
637 | |
556 | Try to copy the I<file> (directories not supported as either source or |
638 | Try to copy the I<file> (directories not supported as either source or |
557 | destination) from C<$srcpath> to C<$dstpath> and call the callback with |
639 | destination) from C<$srcpath> to C<$dstpath> and call the callback with |
558 | the C<0> (error) or C<-1> ok. |
640 | the C<0> (error) or C<-1> ok. |
559 | |
641 | |
560 | This is a composite request that it creates the destination file with |
642 | This is a composite request that creates the destination file with |
561 | mode 0200 and copies the contents of the source file into it using |
643 | mode 0200 and copies the contents of the source file into it using |
562 | C<aio_sendfile>, followed by restoring atime, mtime, access mode and |
644 | C<aio_sendfile>, followed by restoring atime, mtime, access mode and |
563 | uid/gid, in that order. |
645 | uid/gid, in that order. |
564 | |
646 | |
565 | If an error occurs, the partial destination file will be unlinked, if |
647 | If an error occurs, the partial destination file will be unlinked, if |
… | |
… | |
567 | errors are being ignored. |
649 | errors are being ignored. |
568 | |
650 | |
569 | =cut |
651 | =cut |
570 | |
652 | |
571 | sub aio_copy($$;$) { |
653 | sub aio_copy($$;$) { |
572 | aio_block { |
|
|
573 | my ($src, $dst, $cb) = @_; |
654 | my ($src, $dst, $cb) = @_; |
574 | |
655 | |
575 | my $pri = aioreq_pri; |
656 | my $pri = aioreq_pri; |
576 | my $grp = aio_group $cb; |
657 | my $grp = aio_group $cb; |
577 | |
658 | |
578 | aioreq_pri $pri; |
659 | aioreq_pri $pri; |
579 | add $grp aio_open $src, O_RDONLY, 0, sub { |
660 | add $grp aio_open $src, O_RDONLY, 0, sub { |
580 | if (my $src_fh = $_[0]) { |
661 | if (my $src_fh = $_[0]) { |
581 | my @stat = stat $src_fh; |
662 | my @stat = stat $src_fh; # hmm, might bock over nfs? |
582 | |
663 | |
583 | aioreq_pri $pri; |
664 | aioreq_pri $pri; |
584 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
665 | add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { |
585 | if (my $dst_fh = $_[0]) { |
666 | if (my $dst_fh = $_[0]) { |
586 | aioreq_pri $pri; |
667 | aioreq_pri $pri; |
587 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
668 | add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { |
588 | if ($_[0] == $stat[7]) { |
669 | if ($_[0] == $stat[7]) { |
589 | $grp->result (0); |
670 | $grp->result (0); |
590 | close $src_fh; |
671 | close $src_fh; |
591 | |
672 | |
592 | # those should not normally block. should. should. |
|
|
593 | utime $stat[8], $stat[9], $dst; |
|
|
594 | chmod $stat[2] & 07777, $dst_fh; |
|
|
595 | chown $stat[4], $stat[5], $dst_fh; |
|
|
596 | close $dst_fh; |
|
|
597 | } else { |
673 | my $ch = sub { |
598 | $grp->result (-1); |
|
|
599 | close $src_fh; |
|
|
600 | close $dst_fh; |
|
|
601 | |
|
|
602 | aioreq $pri; |
674 | aioreq_pri $pri; |
|
|
675 | add $grp aio_chmod $dst_fh, $stat[2] & 07777, sub { |
|
|
676 | aioreq_pri $pri; |
|
|
677 | add $grp aio_chown $dst_fh, $stat[4], $stat[5], sub { |
|
|
678 | aioreq_pri $pri; |
603 | add $grp aio_unlink $dst; |
679 | add $grp aio_close $dst_fh; |
|
|
680 | } |
|
|
681 | }; |
604 | } |
682 | }; |
|
|
683 | |
|
|
684 | aioreq_pri $pri; |
|
|
685 | add $grp aio_utime $dst_fh, $stat[8], $stat[9], sub { |
|
|
686 | if ($_[0] < 0 && $! == ENOSYS) { |
|
|
687 | aioreq_pri $pri; |
|
|
688 | add $grp aio_utime $dst, $stat[8], $stat[9], $ch; |
|
|
689 | } else { |
|
|
690 | $ch->(); |
|
|
691 | } |
|
|
692 | }; |
|
|
693 | } else { |
|
|
694 | $grp->result (-1); |
|
|
695 | close $src_fh; |
|
|
696 | close $dst_fh; |
|
|
697 | |
|
|
698 | aioreq $pri; |
|
|
699 | add $grp aio_unlink $dst; |
605 | }; |
700 | } |
606 | } else { |
|
|
607 | $grp->result (-1); |
|
|
608 | } |
701 | }; |
|
|
702 | } else { |
|
|
703 | $grp->result (-1); |
609 | }, |
704 | } |
610 | |
|
|
611 | } else { |
|
|
612 | $grp->result (-1); |
|
|
613 | } |
705 | }, |
|
|
706 | |
|
|
707 | } else { |
|
|
708 | $grp->result (-1); |
614 | }; |
709 | } |
615 | |
|
|
616 | $grp |
|
|
617 | } |
710 | }; |
|
|
711 | |
|
|
712 | $grp |
618 | } |
713 | } |
619 | |
714 | |
620 | =item aio_move $srcpath, $dstpath, $callback->($status) |
715 | =item aio_move $srcpath, $dstpath, $callback->($status) |
621 | |
716 | |
622 | Try to move the I<file> (directories not supported as either source or |
717 | Try to move the I<file> (directories not supported as either source or |
623 | destination) from C<$srcpath> to C<$dstpath> and call the callback with |
718 | destination) from C<$srcpath> to C<$dstpath> and call the callback with |
624 | the C<0> (error) or C<-1> ok. |
719 | the C<0> (error) or C<-1> ok. |
625 | |
720 | |
626 | This is a composite request that tries to rename(2) the file first. If |
721 | This is a composite request that tries to rename(2) the file first; if |
627 | rename files with C<EXDEV>, it copies the file with C<aio_copy> and, if |
722 | rename fails with C<EXDEV>, it copies the file with C<aio_copy> and, if |
628 | that is successful, unlinking the C<$srcpath>. |
723 | that is successful, unlinks the C<$srcpath>. |
629 | |
724 | |
630 | =cut |
725 | =cut |
631 | |
726 | |
632 | sub aio_move($$;$) { |
727 | sub aio_move($$;$) { |
633 | aio_block { |
|
|
634 | my ($src, $dst, $cb) = @_; |
728 | my ($src, $dst, $cb) = @_; |
635 | |
729 | |
636 | my $pri = aioreq_pri; |
730 | my $pri = aioreq_pri; |
637 | my $grp = aio_group $cb; |
731 | my $grp = aio_group $cb; |
638 | |
732 | |
639 | aioreq_pri $pri; |
733 | aioreq_pri $pri; |
640 | add $grp aio_rename $src, $dst, sub { |
734 | add $grp aio_rename $src, $dst, sub { |
641 | if ($_[0] && $! == EXDEV) { |
735 | if ($_[0] && $! == EXDEV) { |
642 | aioreq_pri $pri; |
736 | aioreq_pri $pri; |
643 | add $grp aio_copy $src, $dst, sub { |
737 | add $grp aio_copy $src, $dst, sub { |
644 | $grp->result ($_[0]); |
|
|
645 | |
|
|
646 | if (!$_[0]) { |
|
|
647 | aioreq_pri $pri; |
|
|
648 | add $grp aio_unlink $src; |
|
|
649 | } |
|
|
650 | }; |
|
|
651 | } else { |
|
|
652 | $grp->result ($_[0]); |
738 | $grp->result ($_[0]); |
|
|
739 | |
|
|
740 | if (!$_[0]) { |
|
|
741 | aioreq_pri $pri; |
|
|
742 | add $grp aio_unlink $src; |
|
|
743 | } |
653 | } |
744 | }; |
|
|
745 | } else { |
|
|
746 | $grp->result ($_[0]); |
654 | }; |
747 | } |
655 | |
|
|
656 | $grp |
|
|
657 | } |
748 | }; |
|
|
749 | |
|
|
750 | $grp |
658 | } |
751 | } |
659 | |
752 | |
660 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
753 | =item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) |
661 | |
754 | |
662 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
755 | Scans a directory (similar to C<aio_readdir>) but additionally tries to |
… | |
… | |
682 | |
775 | |
683 | Implementation notes. |
776 | Implementation notes. |
684 | |
777 | |
685 | The C<aio_readdir> cannot be avoided, but C<stat()>'ing every entry can. |
778 | The C<aio_readdir> cannot be avoided, but C<stat()>'ing every entry can. |
686 | |
779 | |
|
|
780 | If readdir returns file type information, then this is used directly to |
|
|
781 | find directories. |
|
|
782 | |
687 | After reading the directory, the modification time, size etc. of the |
783 | Otherwise, after reading the directory, the modification time, size etc. |
688 | directory before and after the readdir is checked, and if they match (and |
784 | of the directory before and after the readdir is checked, and if they |
689 | isn't the current time), the link count will be used to decide how many |
785 | match (and isn't the current time), the link count will be used to decide |
690 | entries are directories (if >= 2). Otherwise, no knowledge of the number |
786 | how many entries are directories (if >= 2). Otherwise, no knowledge of the |
691 | of subdirectories will be assumed. |
787 | number of subdirectories will be assumed. |
692 | |
788 | |
693 | Then entries will be sorted into likely directories (everything without |
789 | Then entries will be sorted into likely directories a non-initial dot |
694 | a non-initial dot currently) and likely non-directories (everything |
790 | currently) and likely non-directories (see C<aio_readdirx>). Then every |
695 | else). Then every entry plus an appended C</.> will be C<stat>'ed, |
791 | entry plus an appended C</.> will be C<stat>'ed, likely directories first, |
696 | likely directories first. If that succeeds, it assumes that the entry |
792 | in order of their inode numbers. If that succeeds, it assumes that the |
697 | is a directory or a symlink to directory (which will be checked |
793 | entry is a directory or a symlink to directory (which will be checked |
698 | seperately). This is often faster than stat'ing the entry itself because |
794 | seperately). This is often faster than stat'ing the entry itself because |
699 | filesystems might detect the type of the entry without reading the inode |
795 | filesystems might detect the type of the entry without reading the inode |
700 | data (e.g. ext2fs filetype feature). |
796 | data (e.g. ext2fs filetype feature), even on systems that cannot return |
|
|
797 | the filetype information on readdir. |
701 | |
798 | |
702 | If the known number of directories (link count - 2) has been reached, the |
799 | If the known number of directories (link count - 2) has been reached, the |
703 | rest of the entries is assumed to be non-directories. |
800 | rest of the entries is assumed to be non-directories. |
704 | |
801 | |
705 | This only works with certainty on POSIX (= UNIX) filesystems, which |
802 | This only works with certainty on POSIX (= UNIX) filesystems, which |
… | |
… | |
710 | directory counting heuristic. |
807 | directory counting heuristic. |
711 | |
808 | |
712 | =cut |
809 | =cut |
713 | |
810 | |
714 | sub aio_scandir($$;$) { |
811 | sub aio_scandir($$;$) { |
715 | aio_block { |
|
|
716 | my ($path, $maxreq, $cb) = @_; |
812 | my ($path, $maxreq, $cb) = @_; |
717 | |
813 | |
718 | my $pri = aioreq_pri; |
814 | my $pri = aioreq_pri; |
719 | |
815 | |
720 | my $grp = aio_group $cb; |
816 | my $grp = aio_group $cb; |
721 | |
817 | |
722 | $maxreq = 4 if $maxreq <= 0; |
818 | $maxreq = 4 if $maxreq <= 0; |
723 | |
819 | |
724 | # stat once |
820 | # stat once |
|
|
821 | aioreq_pri $pri; |
|
|
822 | add $grp aio_stat $path, sub { |
|
|
823 | return $grp->result () if $_[0]; |
|
|
824 | my $now = time; |
|
|
825 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
826 | |
|
|
827 | # read the directory entries |
725 | aioreq_pri $pri; |
828 | aioreq_pri $pri; |
726 | add $grp aio_stat $path, sub { |
829 | add $grp aio_readdirx $path, READDIR_DIRS_FIRST, sub { |
|
|
830 | my $entries = shift |
727 | return $grp->result () if $_[0]; |
831 | or return $grp->result (); |
728 | my $now = time; |
|
|
729 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
730 | |
832 | |
731 | # read the directory entries |
833 | # stat the dir another time |
732 | aioreq_pri $pri; |
834 | aioreq_pri $pri; |
733 | add $grp aio_readdir $path, sub { |
|
|
734 | my $entries = shift |
|
|
735 | or return $grp->result (); |
|
|
736 | |
|
|
737 | # stat the dir another time |
|
|
738 | aioreq_pri $pri; |
|
|
739 | add $grp aio_stat $path, sub { |
835 | add $grp aio_stat $path, sub { |
740 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
836 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
741 | |
837 | |
742 | my $ndirs; |
838 | my $ndirs; |
743 | |
839 | |
744 | # take the slow route if anything looks fishy |
840 | # take the slow route if anything looks fishy |
745 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
841 | if ($hash1 ne $hash2 or (stat _)[9] == $now) { |
746 | $ndirs = -1; |
842 | $ndirs = -1; |
747 | } else { |
843 | } else { |
748 | # if nlink == 2, we are finished |
844 | # if nlink == 2, we are finished |
749 | # on non-posix-fs's, we rely on nlink < 2 |
845 | # for non-posix-fs's, we rely on nlink < 2 |
750 | $ndirs = (stat _)[3] - 2 |
846 | $ndirs = (stat _)[3] - 2 |
751 | or return $grp->result ([], $entries); |
847 | or return $grp->result ([], $entries); |
752 | } |
848 | } |
753 | |
849 | |
754 | # sort into likely dirs and likely nondirs |
|
|
755 | # dirs == files without ".", short entries first |
|
|
756 | $entries = [map $_->[0], |
|
|
757 | sort { $b->[1] cmp $a->[1] } |
|
|
758 | map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], |
|
|
759 | @$entries]; |
|
|
760 | |
|
|
761 | my (@dirs, @nondirs); |
850 | my (@dirs, @nondirs); |
762 | |
851 | |
763 | my $statgrp = add $grp aio_group sub { |
852 | my $statgrp = add $grp aio_group sub { |
764 | $grp->result (\@dirs, \@nondirs); |
853 | $grp->result (\@dirs, \@nondirs); |
765 | }; |
854 | }; |
766 | |
855 | |
767 | limit $statgrp $maxreq; |
856 | limit $statgrp $maxreq; |
768 | feed $statgrp sub { |
857 | feed $statgrp sub { |
769 | return unless @$entries; |
858 | return unless @$entries; |
770 | my $entry = pop @$entries; |
859 | my $entry = shift @$entries; |
771 | |
860 | |
772 | aioreq_pri $pri; |
861 | aioreq_pri $pri; |
773 | add $statgrp aio_stat "$path/$entry/.", sub { |
862 | add $statgrp aio_stat "$path/$entry/.", sub { |
774 | if ($_[0] < 0) { |
863 | if ($_[0] < 0) { |
775 | push @nondirs, $entry; |
864 | push @nondirs, $entry; |
776 | } else { |
865 | } else { |
777 | # need to check for real directory |
866 | # need to check for real directory |
778 | aioreq_pri $pri; |
867 | aioreq_pri $pri; |
779 | add $statgrp aio_lstat "$path/$entry", sub { |
868 | add $statgrp aio_lstat "$path/$entry", sub { |
780 | if (-d _) { |
869 | if (-d _) { |
781 | push @dirs, $entry; |
870 | push @dirs, $entry; |
782 | |
871 | |
783 | unless (--$ndirs) { |
872 | unless (--$ndirs) { |
784 | push @nondirs, @$entries; |
873 | push @nondirs, @$entries; |
785 | feed $statgrp; |
874 | feed $statgrp; |
786 | } |
|
|
787 | } else { |
|
|
788 | push @nondirs, $entry; |
|
|
789 | } |
875 | } |
|
|
876 | } else { |
|
|
877 | push @nondirs, $entry; |
790 | } |
878 | } |
791 | } |
879 | } |
792 | }; |
880 | } |
793 | }; |
881 | }; |
794 | }; |
882 | }; |
795 | }; |
883 | }; |
796 | }; |
884 | }; |
797 | |
|
|
798 | $grp |
|
|
799 | } |
885 | }; |
|
|
886 | |
|
|
887 | $grp |
800 | } |
888 | } |
801 | |
889 | |
802 | =item aio_rmtree $path, $callback->($status) |
890 | =item aio_rmtree $path, $callback->($status) |
803 | |
891 | |
804 | Delete a directory tree starting (and including) C<$path>, return the |
892 | Delete a directory tree starting (and including) C<$path>, return the |
… | |
… | |
808 | |
896 | |
809 | =cut |
897 | =cut |
810 | |
898 | |
811 | sub aio_rmtree; |
899 | sub aio_rmtree; |
812 | sub aio_rmtree($;$) { |
900 | sub aio_rmtree($;$) { |
813 | aio_block { |
|
|
814 | my ($path, $cb) = @_; |
901 | my ($path, $cb) = @_; |
815 | |
902 | |
816 | my $pri = aioreq_pri; |
903 | my $pri = aioreq_pri; |
817 | my $grp = aio_group $cb; |
904 | my $grp = aio_group $cb; |
818 | |
905 | |
819 | aioreq_pri $pri; |
906 | aioreq_pri $pri; |
820 | add $grp aio_scandir $path, 0, sub { |
907 | add $grp aio_scandir $path, 0, sub { |
821 | my ($dirs, $nondirs) = @_; |
908 | my ($dirs, $nondirs) = @_; |
822 | |
909 | |
823 | my $dirgrp = aio_group sub { |
910 | my $dirgrp = aio_group sub { |
824 | add $grp aio_rmdir $path, sub { |
911 | add $grp aio_rmdir $path, sub { |
825 | $grp->result ($_[0]); |
912 | $grp->result ($_[0]); |
826 | }; |
|
|
827 | }; |
913 | }; |
828 | |
|
|
829 | (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs; |
|
|
830 | (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs; |
|
|
831 | |
|
|
832 | add $grp $dirgrp; |
|
|
833 | }; |
914 | }; |
834 | |
915 | |
835 | $grp |
916 | (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs; |
|
|
917 | (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs; |
|
|
918 | |
|
|
919 | add $grp $dirgrp; |
836 | } |
920 | }; |
|
|
921 | |
|
|
922 | $grp |
837 | } |
923 | } |
|
|
924 | |
|
|
925 | =item aio_sync $callback->($status) |
|
|
926 | |
|
|
927 | Asynchronously call sync and call the callback when finished. |
838 | |
928 | |
839 | =item aio_fsync $fh, $callback->($status) |
929 | =item aio_fsync $fh, $callback->($status) |
840 | |
930 | |
841 | Asynchronously call fsync on the given filehandle and call the callback |
931 | Asynchronously call fsync on the given filehandle and call the callback |
842 | with the fsync result code. |
932 | with the fsync result code. |
… | |
… | |
846 | Asynchronously call fdatasync on the given filehandle and call the |
936 | Asynchronously call fdatasync on the given filehandle and call the |
847 | callback with the fdatasync result code. |
937 | callback with the fdatasync result code. |
848 | |
938 | |
849 | If this call isn't available because your OS lacks it or it couldn't be |
939 | If this call isn't available because your OS lacks it or it couldn't be |
850 | detected, it will be emulated by calling C<fsync> instead. |
940 | detected, it will be emulated by calling C<fsync> instead. |
|
|
941 | |
|
|
942 | =item aio_sync_file_range $fh, $offset, $nbytes, $flags, $callback->($status) |
|
|
943 | |
|
|
944 | Sync the data portion of the file specified by C<$offset> and C<$length> |
|
|
945 | to disk (but NOT the metadata), by calling the Linux-specific |
|
|
946 | sync_file_range call. If sync_file_range is not available or it returns |
|
|
947 | ENOSYS, then fdatasync or fsync is being substituted. |
|
|
948 | |
|
|
949 | C<$flags> can be a combination of C<IO::AIO::SYNC_FILE_RANGE_WAIT_BEFORE>, |
|
|
950 | C<IO::AIO::SYNC_FILE_RANGE_WRITE> and |
|
|
951 | C<IO::AIO::SYNC_FILE_RANGE_WAIT_AFTER>: refer to the sync_file_range |
|
|
952 | manpage for details. |
|
|
953 | |
|
|
954 | =item aio_pathsync $path, $callback->($status) |
|
|
955 | |
|
|
956 | This request tries to open, fsync and close the given path. This is a |
|
|
957 | composite request intended to sync directories after directory operations |
|
|
958 | (E.g. rename). This might not work on all operating systems or have any |
|
|
959 | specific effect, but usually it makes sure that directory changes get |
|
|
960 | written to disc. It works for anything that can be opened for read-only, |
|
|
961 | not just directories. |
|
|
962 | |
|
|
963 | Passes C<0> when everything went ok, and C<-1> on error. |
|
|
964 | |
|
|
965 | =cut |
|
|
966 | |
|
|
967 | sub aio_pathsync($;$) { |
|
|
968 | my ($path, $cb) = @_; |
|
|
969 | |
|
|
970 | my $pri = aioreq_pri; |
|
|
971 | my $grp = aio_group $cb; |
|
|
972 | |
|
|
973 | aioreq_pri $pri; |
|
|
974 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
975 | my ($fh) = @_; |
|
|
976 | if ($fh) { |
|
|
977 | aioreq_pri $pri; |
|
|
978 | add $grp aio_fsync $fh, sub { |
|
|
979 | $grp->result ($_[0]); |
|
|
980 | |
|
|
981 | aioreq_pri $pri; |
|
|
982 | add $grp aio_close $fh; |
|
|
983 | }; |
|
|
984 | } else { |
|
|
985 | $grp->result (-1); |
|
|
986 | } |
|
|
987 | }; |
|
|
988 | |
|
|
989 | $grp |
|
|
990 | } |
851 | |
991 | |
852 | =item aio_group $callback->(...) |
992 | =item aio_group $callback->(...) |
853 | |
993 | |
854 | This is a very special aio request: Instead of doing something, it is a |
994 | This is a very special aio request: Instead of doing something, it is a |
855 | container for other aio requests, which is useful if you want to bundle |
995 | container for other aio requests, which is useful if you want to bundle |
… | |
… | |
905 | =item cancel $req |
1045 | =item cancel $req |
906 | |
1046 | |
907 | Cancels the request, if possible. Has the effect of skipping execution |
1047 | Cancels the request, if possible. Has the effect of skipping execution |
908 | when entering the B<execute> state and skipping calling the callback when |
1048 | when entering the B<execute> state and skipping calling the callback when |
909 | entering the the B<result> state, but will leave the request otherwise |
1049 | entering the the B<result> state, but will leave the request otherwise |
910 | untouched. That means that requests that currently execute will not be |
1050 | untouched (with the exception of readdir). That means that requests that |
911 | stopped and resources held by the request will not be freed prematurely. |
1051 | currently execute will not be stopped and resources held by the request |
|
|
1052 | will not be freed prematurely. |
912 | |
1053 | |
913 | =item cb $req $callback->(...) |
1054 | =item cb $req $callback->(...) |
914 | |
1055 | |
915 | Replace (or simply set) the callback registered to the request. |
1056 | Replace (or simply set) the callback registered to the request. |
916 | |
1057 | |
… | |
… | |
967 | Their lifetime, simplified, looks like this: when they are empty, they |
1108 | Their lifetime, simplified, looks like this: when they are empty, they |
968 | will finish very quickly. If they contain only requests that are in the |
1109 | will finish very quickly. If they contain only requests that are in the |
969 | C<done> state, they will also finish. Otherwise they will continue to |
1110 | C<done> state, they will also finish. Otherwise they will continue to |
970 | exist. |
1111 | exist. |
971 | |
1112 | |
972 | That means after creating a group you have some time to add requests. And |
1113 | That means after creating a group you have some time to add requests |
973 | in the callbacks of those requests, you can add further requests to the |
1114 | (precisely before the callback has been invoked, which is only done within |
974 | group. And only when all those requests have finished will the the group |
1115 | the C<poll_cb>). And in the callbacks of those requests, you can add |
975 | itself finish. |
1116 | further requests to the group. And only when all those requests have |
|
|
1117 | finished will the the group itself finish. |
976 | |
1118 | |
977 | =over 4 |
1119 | =over 4 |
978 | |
1120 | |
979 | =item add $grp ... |
1121 | =item add $grp ... |
980 | |
1122 | |
… | |
… | |
992 | itself. Useful when you queued a lot of events but got a result early. |
1134 | itself. Useful when you queued a lot of events but got a result early. |
993 | |
1135 | |
994 | =item $grp->result (...) |
1136 | =item $grp->result (...) |
995 | |
1137 | |
996 | Set the result value(s) that will be passed to the group callback when all |
1138 | Set the result value(s) that will be passed to the group callback when all |
997 | subrequests have finished and set thre groups errno to the current value |
1139 | subrequests have finished and set the groups errno to the current value |
998 | of errno (just like calling C<errno> without an error number). By default, |
1140 | of errno (just like calling C<errno> without an error number). By default, |
999 | no argument will be passed and errno is zero. |
1141 | no argument will be passed and errno is zero. |
1000 | |
1142 | |
1001 | =item $grp->errno ([$errno]) |
1143 | =item $grp->errno ([$errno]) |
1002 | |
1144 | |
… | |
… | |
1013 | =item feed $grp $callback->($grp) |
1155 | =item feed $grp $callback->($grp) |
1014 | |
1156 | |
1015 | Sets a feeder/generator on this group: every group can have an attached |
1157 | Sets a feeder/generator on this group: every group can have an attached |
1016 | generator that generates requests if idle. The idea behind this is that, |
1158 | generator that generates requests if idle. The idea behind this is that, |
1017 | although you could just queue as many requests as you want in a group, |
1159 | although you could just queue as many requests as you want in a group, |
1018 | this might starve other requests for a potentially long time. For |
1160 | this might starve other requests for a potentially long time. For example, |
1019 | example, C<aio_scandir> might generate hundreds of thousands C<aio_stat> |
1161 | C<aio_scandir> might generate hundreds of thousands C<aio_stat> requests, |
1020 | requests, delaying any later requests for a long time. |
1162 | delaying any later requests for a long time. |
1021 | |
1163 | |
1022 | To avoid this, and allow incremental generation of requests, you can |
1164 | To avoid this, and allow incremental generation of requests, you can |
1023 | instead a group and set a feeder on it that generates those requests. The |
1165 | instead a group and set a feeder on it that generates those requests. The |
1024 | feed callback will be called whenever there are few enough (see C<limit>, |
1166 | feed callback will be called whenever there are few enough (see C<limit>, |
1025 | below) requests active in the group itself and is expected to queue more |
1167 | below) requests active in the group itself and is expected to queue more |
… | |
… | |
1029 | not impose any limits). |
1171 | not impose any limits). |
1030 | |
1172 | |
1031 | If the feed does not queue more requests when called, it will be |
1173 | If the feed does not queue more requests when called, it will be |
1032 | automatically removed from the group. |
1174 | automatically removed from the group. |
1033 | |
1175 | |
1034 | If the feed limit is C<0>, it will be set to C<2> automatically. |
1176 | If the feed limit is C<0> when this method is called, it will be set to |
|
|
1177 | C<2> automatically. |
1035 | |
1178 | |
1036 | Example: |
1179 | Example: |
1037 | |
1180 | |
1038 | # stat all files in @files, but only ever use four aio requests concurrently: |
1181 | # stat all files in @files, but only ever use four aio requests concurrently: |
1039 | |
1182 | |
… | |
… | |
1051 | Sets the feeder limit for the group: The feeder will be called whenever |
1194 | Sets the feeder limit for the group: The feeder will be called whenever |
1052 | the group contains less than this many requests. |
1195 | the group contains less than this many requests. |
1053 | |
1196 | |
1054 | Setting the limit to C<0> will pause the feeding process. |
1197 | Setting the limit to C<0> will pause the feeding process. |
1055 | |
1198 | |
|
|
1199 | The default value for the limit is C<0>, but note that setting a feeder |
|
|
1200 | automatically bumps it up to C<2>. |
|
|
1201 | |
1056 | =back |
1202 | =back |
1057 | |
1203 | |
1058 | =head2 SUPPORT FUNCTIONS |
1204 | =head2 SUPPORT FUNCTIONS |
1059 | |
1205 | |
1060 | =head3 EVENT PROCESSING AND EVENT LOOP INTEGRATION |
1206 | =head3 EVENT PROCESSING AND EVENT LOOP INTEGRATION |
… | |
… | |
1071 | See C<poll_cb> for an example. |
1217 | See C<poll_cb> for an example. |
1072 | |
1218 | |
1073 | =item IO::AIO::poll_cb |
1219 | =item IO::AIO::poll_cb |
1074 | |
1220 | |
1075 | Process some outstanding events on the result pipe. You have to call this |
1221 | Process some outstanding events on the result pipe. You have to call this |
1076 | regularly. Returns the number of events processed. Returns immediately |
1222 | regularly. Returns C<0> if all events could be processed, or C<-1> if it |
|
|
1223 | returned earlier for whatever reason. Returns immediately when no events |
1077 | when no events are outstanding. The amount of events processed depends on |
1224 | are outstanding. The amount of events processed depends on the settings of |
1078 | the settings of C<IO::AIO::max_poll_req> and C<IO::AIO::max_poll_time>. |
1225 | C<IO::AIO::max_poll_req> and C<IO::AIO::max_poll_time>. |
1079 | |
1226 | |
1080 | If not all requests were processed for whatever reason, the filehandle |
1227 | If not all requests were processed for whatever reason, the filehandle |
1081 | will still be ready when C<poll_cb> returns. |
1228 | will still be ready when C<poll_cb> returns, so normally you don't have to |
|
|
1229 | do anything special to have it called later. |
1082 | |
1230 | |
1083 | Example: Install an Event watcher that automatically calls |
1231 | Example: Install an Event watcher that automatically calls |
1084 | IO::AIO::poll_cb with high priority: |
1232 | IO::AIO::poll_cb with high priority: |
1085 | |
1233 | |
1086 | Event->io (fd => IO::AIO::poll_fileno, |
1234 | Event->io (fd => IO::AIO::poll_fileno, |
… | |
… | |
1200 | |
1348 | |
1201 | The default is probably ok in most situations, especially if thread |
1349 | The default is probably ok in most situations, especially if thread |
1202 | creation is fast. If thread creation is very slow on your system you might |
1350 | creation is fast. If thread creation is very slow on your system you might |
1203 | want to use larger values. |
1351 | want to use larger values. |
1204 | |
1352 | |
1205 | =item $oldmaxreqs = IO::AIO::max_outstanding $maxreqs |
1353 | =item IO::AIO::max_outstanding $maxreqs |
1206 | |
1354 | |
1207 | This is a very bad function to use in interactive programs because it |
1355 | This is a very bad function to use in interactive programs because it |
1208 | blocks, and a bad way to reduce concurrency because it is inexact: Better |
1356 | blocks, and a bad way to reduce concurrency because it is inexact: Better |
1209 | use an C<aio_group> together with a feed callback. |
1357 | use an C<aio_group> together with a feed callback. |
1210 | |
1358 | |
1211 | Sets the maximum number of outstanding requests to C<$nreqs>. If you |
1359 | Sets the maximum number of outstanding requests to C<$nreqs>. If you |
1212 | to queue up more than this number of requests, the next call to the |
1360 | do queue up more than this number of requests, the next call to the |
1213 | C<poll_cb> (and C<poll_some> and other functions calling C<poll_cb>) |
1361 | C<poll_cb> (and C<poll_some> and other functions calling C<poll_cb>) |
1214 | function will block until the limit is no longer exceeded. |
1362 | function will block until the limit is no longer exceeded. |
1215 | |
1363 | |
1216 | The default value is very large, so there is no practical limit on the |
1364 | The default value is very large, so there is no practical limit on the |
1217 | number of outstanding requests. |
1365 | number of outstanding requests. |
1218 | |
1366 | |
1219 | You can still queue as many requests as you want. Therefore, |
1367 | You can still queue as many requests as you want. Therefore, |
1220 | C<max_oustsanding> is mainly useful in simple scripts (with low values) or |
1368 | C<max_outstanding> is mainly useful in simple scripts (with low values) or |
1221 | as a stop gap to shield against fatal memory overflow (with large values). |
1369 | as a stop gap to shield against fatal memory overflow (with large values). |
1222 | |
1370 | |
1223 | =back |
1371 | =back |
1224 | |
1372 | |
1225 | =head3 STATISTICAL INFORMATION |
1373 | =head3 STATISTICAL INFORMATION |
… | |
… | |
1247 | but not yet processed by poll_cb). |
1395 | but not yet processed by poll_cb). |
1248 | |
1396 | |
1249 | =back |
1397 | =back |
1250 | |
1398 | |
1251 | =cut |
1399 | =cut |
1252 | |
|
|
1253 | # support function to convert a fd into a perl filehandle |
|
|
1254 | sub _fd2fh { |
|
|
1255 | return undef if $_[0] < 0; |
|
|
1256 | |
|
|
1257 | # try to generate nice filehandles |
|
|
1258 | my $sym = "IO::AIO::fd#$_[0]"; |
|
|
1259 | local *$sym; |
|
|
1260 | |
|
|
1261 | open *$sym, "+<&=$_[0]" # usually works under any unix |
|
|
1262 | or open *$sym, "<&=$_[0]" # cygwin needs this |
|
|
1263 | or open *$sym, ">&=$_[0]" # or this |
|
|
1264 | or return undef; |
|
|
1265 | |
|
|
1266 | *$sym |
|
|
1267 | } |
|
|
1268 | |
1400 | |
1269 | min_parallel 8; |
1401 | min_parallel 8; |
1270 | |
1402 | |
1271 | END { flush } |
1403 | END { flush } |
1272 | |
1404 | |
… | |
… | |
1311 | |
1443 | |
1312 | Known bugs will be fixed in the next release. |
1444 | Known bugs will be fixed in the next release. |
1313 | |
1445 | |
1314 | =head1 SEE ALSO |
1446 | =head1 SEE ALSO |
1315 | |
1447 | |
1316 | L<Coro::AIO>. |
1448 | L<AnyEvent::AIO> for easy integration into event loops, L<Coro::AIO> for a |
|
|
1449 | more natural syntax. |
1317 | |
1450 | |
1318 | =head1 AUTHOR |
1451 | =head1 AUTHOR |
1319 | |
1452 | |
1320 | Marc Lehmann <schmorp@schmorp.de> |
1453 | Marc Lehmann <schmorp@schmorp.de> |
1321 | http://home.schmorp.de/ |
1454 | http://home.schmorp.de/ |