… | |
… | |
26 | $req->cancel; # cancel request if still in queue |
26 | $req->cancel; # cancel request if still in queue |
27 | |
27 | |
28 | my $grp = aio_group sub { print "all stats done\n" }; |
28 | my $grp = aio_group sub { print "all stats done\n" }; |
29 | add $grp aio_stat "..." for ...; |
29 | add $grp aio_stat "..." for ...; |
30 | |
30 | |
31 | # AnyEvent integration |
31 | # AnyEvent integration (EV, Event, Glib, Tk, urxvt, pureperl...) |
32 | open my $fh, "<&=" . IO::AIO::poll_fileno or die "$!"; |
32 | open my $fh, "<&=" . IO::AIO::poll_fileno or die "$!"; |
33 | my $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { IO::AIO::poll_cb }); |
33 | my $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { IO::AIO::poll_cb }); |
|
|
34 | |
|
|
35 | # EV integration |
|
|
36 | my $w = EV::io IO::AIO::poll_fileno, EV::READ, \&IO::AIO::poll_cb; |
34 | |
37 | |
35 | # Event integration |
38 | # Event integration |
36 | Event->io (fd => IO::AIO::poll_fileno, |
39 | Event->io (fd => IO::AIO::poll_fileno, |
37 | poll => 'r', |
40 | poll => 'r', |
38 | cb => \&IO::AIO::poll_cb); |
41 | cb => \&IO::AIO::poll_cb); |
… | |
… | |
191 | use strict 'vars'; |
194 | use strict 'vars'; |
192 | |
195 | |
193 | use base 'Exporter'; |
196 | use base 'Exporter'; |
194 | |
197 | |
195 | BEGIN { |
198 | BEGIN { |
196 | our $VERSION = '2.51'; |
199 | our $VERSION = '2.61'; |
197 | |
200 | |
198 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat |
201 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
199 | aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink |
202 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir |
200 | aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link |
203 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
|
|
204 | aio_fdatasync aio_pathsync aio_readahead |
|
|
205 | aio_rename aio_link aio_move aio_copy aio_group |
201 | aio_move aio_copy aio_group aio_nop aio_mknod aio_load aio_rmtree aio_mkdir |
206 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
202 | aio_chown aio_chmod aio_utime aio_truncate); |
207 | aio_chmod aio_utime aio_truncate); |
|
|
208 | |
203 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block)); |
209 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block)); |
204 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
210 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
205 | min_parallel max_parallel max_idle |
211 | min_parallel max_parallel max_idle |
206 | nreqs nready npending nthreads |
212 | nreqs nready npending nthreads |
207 | max_poll_time max_poll_reqs); |
213 | max_poll_time max_poll_reqs); |
… | |
… | |
316 | |
322 | |
317 | Asynchronously close a file and call the callback with the result |
323 | Asynchronously close a file and call the callback with the result |
318 | code. |
324 | code. |
319 | |
325 | |
320 | Unfortunately, you can't do this to perl. Perl I<insists> very strongly on |
326 | Unfortunately, you can't do this to perl. Perl I<insists> very strongly on |
321 | closing the file descriptor associated with the filehandle itself. Here is |
327 | closing the file descriptor associated with the filehandle itself. |
322 | what aio_close will try: |
|
|
323 | |
328 | |
324 | 1. dup()licate the fd |
329 | Therefore, C<aio_close> will not close the filehandle - instead it will |
325 | 2. asynchronously close() the duplicated fd |
330 | use dup2 to overwrite the file descriptor with the write-end of a pipe |
326 | 3. dup()licate the fd once more |
331 | (the pipe fd will be created on demand and will be cached). |
327 | 4. let perl close() the filehandle |
|
|
328 | 5. asynchronously close the duplicated fd |
|
|
329 | |
332 | |
330 | The idea is that the first close() flushes stuff to disk that closing an |
333 | Or in other words: the file descriptor will be closed, but it will not be |
331 | fd will flush, so when perl closes the fd, nothing much will need to be |
334 | free for reuse until the perl filehandle is closed. |
332 | flushed. The second async. close() will then flush stuff to disk that |
|
|
333 | closing the last fd to the file will flush. |
|
|
334 | |
|
|
335 | Just FYI, SuSv3 has this to say on close: |
|
|
336 | |
|
|
337 | All outstanding record locks owned by the process on the file |
|
|
338 | associated with the file descriptor shall be removed. |
|
|
339 | |
|
|
340 | If fildes refers to a socket, close() shall cause the socket to be |
|
|
341 | destroyed. ... close() shall block for up to the current linger |
|
|
342 | interval until all data is transmitted. |
|
|
343 | [this actually sounds like a specification bug, but who knows] |
|
|
344 | |
|
|
345 | And at least Linux additionally actually flushes stuff on every close, |
|
|
346 | even when the file itself is still open. |
|
|
347 | |
|
|
348 | Sounds enourmously inefficient and complicated? Yes... please show me how |
|
|
349 | to nuke perl's fd out of existence... |
|
|
350 | |
335 | |
351 | =cut |
336 | =cut |
352 | |
|
|
353 | sub aio_close($;$) { |
|
|
354 | aio_block { |
|
|
355 | my ($fh, $cb) = @_; |
|
|
356 | |
|
|
357 | my $pri = aioreq_pri; |
|
|
358 | my $grp = aio_group $cb; |
|
|
359 | |
|
|
360 | my $fd = fileno $fh; |
|
|
361 | |
|
|
362 | defined $fd or Carp::croak "aio_close called with fd-less filehandle"; |
|
|
363 | |
|
|
364 | # if the dups fail we will simply get EBADF |
|
|
365 | my $fd2 = _dup $fd; |
|
|
366 | aioreq_pri $pri; |
|
|
367 | add $grp _aio_close $fd2, sub { |
|
|
368 | my $fd2 = _dup $fd; |
|
|
369 | close $fh; |
|
|
370 | aioreq_pri $pri; |
|
|
371 | add $grp _aio_close $fd2, sub { |
|
|
372 | $grp->result ($_[0]); |
|
|
373 | }; |
|
|
374 | }; |
|
|
375 | |
|
|
376 | $grp |
|
|
377 | } |
|
|
378 | } |
|
|
379 | |
|
|
380 | |
337 | |
381 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
338 | =item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
382 | |
339 | |
383 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
340 | =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) |
384 | |
341 | |
… | |
… | |
647 | |
604 | |
648 | # those should not normally block. should. should. |
605 | # those should not normally block. should. should. |
649 | utime $stat[8], $stat[9], $dst; |
606 | utime $stat[8], $stat[9], $dst; |
650 | chmod $stat[2] & 07777, $dst_fh; |
607 | chmod $stat[2] & 07777, $dst_fh; |
651 | chown $stat[4], $stat[5], $dst_fh; |
608 | chown $stat[4], $stat[5], $dst_fh; |
|
|
609 | |
|
|
610 | aioreq_pri $pri; |
652 | close $dst_fh; |
611 | add $grp aio_close $dst_fh; |
653 | } else { |
612 | } else { |
654 | $grp->result (-1); |
613 | $grp->result (-1); |
655 | close $src_fh; |
614 | close $src_fh; |
656 | close $dst_fh; |
615 | close $dst_fh; |
657 | |
616 | |
… | |
… | |
890 | |
849 | |
891 | $grp |
850 | $grp |
892 | } |
851 | } |
893 | } |
852 | } |
894 | |
853 | |
|
|
854 | =item aio_sync $callback->($status) |
|
|
855 | |
|
|
856 | Asynchronously call sync and call the callback when finished. |
|
|
857 | |
895 | =item aio_fsync $fh, $callback->($status) |
858 | =item aio_fsync $fh, $callback->($status) |
896 | |
859 | |
897 | Asynchronously call fsync on the given filehandle and call the callback |
860 | Asynchronously call fsync on the given filehandle and call the callback |
898 | with the fsync result code. |
861 | with the fsync result code. |
899 | |
862 | |
… | |
… | |
902 | Asynchronously call fdatasync on the given filehandle and call the |
865 | Asynchronously call fdatasync on the given filehandle and call the |
903 | callback with the fdatasync result code. |
866 | callback with the fdatasync result code. |
904 | |
867 | |
905 | If this call isn't available because your OS lacks it or it couldn't be |
868 | If this call isn't available because your OS lacks it or it couldn't be |
906 | detected, it will be emulated by calling C<fsync> instead. |
869 | detected, it will be emulated by calling C<fsync> instead. |
|
|
870 | |
|
|
871 | =item aio_pathsync $path, $callback->($status) |
|
|
872 | |
|
|
873 | This request tries to open, fsync and close the given path. This is a |
|
|
874 | composite request intended tosync directories after directory operations |
|
|
875 | (E.g. rename). This might not work on all operating systems or have any |
|
|
876 | specific effect, but usually it makes sure that directory changes get |
|
|
877 | written to disc. It works for anything that can be opened for read-only, |
|
|
878 | not just directories. |
|
|
879 | |
|
|
880 | Passes C<0> when everything went ok, and C<-1> on error. |
|
|
881 | |
|
|
882 | =cut |
|
|
883 | |
|
|
884 | sub aio_pathsync($;$) { |
|
|
885 | aio_block { |
|
|
886 | my ($path, $cb) = @_; |
|
|
887 | |
|
|
888 | my $pri = aioreq_pri; |
|
|
889 | my $grp = aio_group $cb; |
|
|
890 | |
|
|
891 | aioreq_pri $pri; |
|
|
892 | add $grp aio_open $path, O_RDONLY, 0, sub { |
|
|
893 | my ($fh) = @_; |
|
|
894 | if ($fh) { |
|
|
895 | aioreq_pri $pri; |
|
|
896 | add $grp aio_fsync $fh, sub { |
|
|
897 | $grp->result ($_[0]); |
|
|
898 | |
|
|
899 | aioreq_pri $pri; |
|
|
900 | add $grp aio_close $fh; |
|
|
901 | }; |
|
|
902 | } else { |
|
|
903 | $grp->result (-1); |
|
|
904 | } |
|
|
905 | }; |
|
|
906 | |
|
|
907 | $grp |
|
|
908 | } |
|
|
909 | } |
907 | |
910 | |
908 | =item aio_group $callback->(...) |
911 | =item aio_group $callback->(...) |
909 | |
912 | |
910 | This is a very special aio request: Instead of doing something, it is a |
913 | This is a very special aio request: Instead of doing something, it is a |
911 | container for other aio requests, which is useful if you want to bundle |
914 | container for other aio requests, which is useful if you want to bundle |
… | |
… | |
1048 | itself. Useful when you queued a lot of events but got a result early. |
1051 | itself. Useful when you queued a lot of events but got a result early. |
1049 | |
1052 | |
1050 | =item $grp->result (...) |
1053 | =item $grp->result (...) |
1051 | |
1054 | |
1052 | Set the result value(s) that will be passed to the group callback when all |
1055 | Set the result value(s) that will be passed to the group callback when all |
1053 | subrequests have finished and set thre groups errno to the current value |
1056 | subrequests have finished and set the groups errno to the current value |
1054 | of errno (just like calling C<errno> without an error number). By default, |
1057 | of errno (just like calling C<errno> without an error number). By default, |
1055 | no argument will be passed and errno is zero. |
1058 | no argument will be passed and errno is zero. |
1056 | |
1059 | |
1057 | =item $grp->errno ([$errno]) |
1060 | =item $grp->errno ([$errno]) |
1058 | |
1061 | |