| … | |
… | |
| 485 | my $self = shift; |
485 | my $self = shift; |
| 486 | |
486 | |
| 487 | # ideally, we would want to use "a (w/a)*" as format string, but perl |
487 | # ideally, we would want to use "a (w/a)*" as format string, but perl |
| 488 | # versions from at least 5.8.9 to 5.16.3 are all buggy and can't unpack |
488 | # versions from at least 5.8.9 to 5.16.3 are all buggy and can't unpack |
| 489 | # it. |
489 | # it. |
| 490 | push @{ $self->[QUEUE] }, pack "a L/a*", $_[0], $_[1]; |
490 | push @{ $self->[QUEUE] }, pack "a N/a*", $_[0], $_[1]; |
| 491 | |
491 | |
| 492 | $self->[WW] ||= AE::io $self->[FH], 1, sub { |
492 | $self->[WW] ||= AE::io $self->[FH], 1, sub { |
| 493 | do { |
493 | do { |
| 494 | # send the next "thing" in the queue - either a reference to an fh, |
494 | # send the next "thing" in the queue - either a reference to an fh, |
| 495 | # or a plain string. |
495 | # or a plain string. |
| … | |
… | |
| 847 | |
847 | |
| 848 | $self->[CB] = $cb; |
848 | $self->[CB] = $cb; |
| 849 | $self->_cmd (r => $func); |
849 | $self->_cmd (r => $func); |
| 850 | } |
850 | } |
| 851 | |
851 | |
|
|
852 | =back |
|
|
853 | |
|
|
854 | =head2 ADVANCED METHODS |
|
|
855 | |
|
|
856 | =over 4 |
|
|
857 | |
|
|
858 | =item new_from_stdio AnyEvent::Fork $fh |
|
|
859 | |
|
|
860 | Assume that you have a perl interpreter running (without any special |
|
|
861 | options or a program) somewhere and it has it's STDIN and STDOUT connected |
|
|
862 | to the C<$fh> somehow. I.e. exactly the state perl is in when you start it |
|
|
863 | without any arguments: |
|
|
864 | |
|
|
865 | perl |
|
|
866 | |
|
|
867 | Then you can create an C<AnyEvent::Fork> object out of this perl |
|
|
868 | interpreter with this constructor. |
|
|
869 | |
|
|
870 | When the usefulness of this isn't immediately clear, imagine you manage to |
|
|
871 | run a perl interpreter remotely (F<ssh remotemachine perl>), then you can |
|
|
872 | manage it mostly like a local C<AnyEvent::Fork> child. |
|
|
873 | |
|
|
874 | This works without any module support, i.e. the remote F<perl> does not |
|
|
875 | need to have any special modules installed. |
|
|
876 | |
|
|
877 | There are a number of limitations though: C<send_fh> will only work if the |
|
|
878 | L<IO::FDPass> module is loadable by the remote perl and the two processes |
|
|
879 | are connected in a way that let's L<IO::FDPass> do it's work. |
|
|
880 | |
|
|
881 | This will therefore not work over a network connection. From this follows |
|
|
882 | that C<fork> will also not work under these circumstances, as it relies on |
|
|
883 | C<send_fh> internally. |
|
|
884 | |
|
|
885 | Although not a limitation of this module, keep in mind that the |
|
|
886 | "communications socket" is simply C<STDIN>, and depending on how you |
|
|
887 | started F<perl> (e.g. via F<ssh>), it might only be half-duplex. This is |
|
|
888 | fine for C<AnyEvent::Fork>, but your C<run> function might want to use |
|
|
889 | C<STDIN> (or the "communications socket") for input and C<STDOUT> for |
|
|
890 | output. |
|
|
891 | |
|
|
892 | You can support both cases by checking the C<fileno> of the handle passed |
|
|
893 | to your run function: |
|
|
894 | |
|
|
895 | sub run { |
|
|
896 | my ($rfh) = @_; |
|
|
897 | |
|
|
898 | my $wfh = fileno $rfh ? $rfh : *STDOUT; |
|
|
899 | |
|
|
900 | # now use $rfh for reading and $wfh for writing |
|
|
901 | } |
|
|
902 | |
|
|
903 | =cut |
|
|
904 | |
|
|
905 | sub new_from_stdio { |
|
|
906 | my ($class, $fh) = @_; |
|
|
907 | |
|
|
908 | my $self = $class->_new ($fh); |
|
|
909 | |
|
|
910 | # send startup code |
|
|
911 | push @{ $self->[QUEUE] }, |
|
|
912 | (do "AnyEvent/Fork/serve.pl") |
|
|
913 | . <<'EOF'; |
|
|
914 | |
|
|
915 | $OWNER = "another process"; |
|
|
916 | $0 = "AnyEvent::Fork/stdio of $OWNER"; |
|
|
917 | |
|
|
918 | serve *STDIN; |
|
|
919 | __END__ |
|
|
920 | EOF |
|
|
921 | |
|
|
922 | # the data is only sent when the user requests additional things, which |
|
|
923 | # is likely early enough for our purposes. |
|
|
924 | |
|
|
925 | $self |
|
|
926 | } |
|
|
927 | |
|
|
928 | =back |
|
|
929 | |
|
|
930 | =head2 EXPERIMENTAL METHODS |
|
|
931 | |
|
|
932 | These methods might go away completely or change behaviour, a any time. |
|
|
933 | |
|
|
934 | =over 4 |
|
|
935 | |
| 852 | =item $proc->to_fh ($cb->($fh)) # EXPERIMENTAL, MIGHT BE REMOVED |
936 | =item $proc->to_fh ($cb->($fh)) # EXPERIMENTAL, MIGHT BE REMOVED |
| 853 | |
937 | |
| 854 | Flushes all commands out to the process and then calls the callback with |
938 | Flushes all commands out to the process and then calls the callback with |
| 855 | the communications socket. |
939 | the communications socket. |
| 856 | |
940 | |
