| … | |
… | |
| 849 | $self->_cmd (r => $func); |
849 | $self->_cmd (r => $func); |
| 850 | } |
850 | } |
| 851 | |
851 | |
| 852 | =back |
852 | =back |
| 853 | |
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 conenction. 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 | =cut |
|
|
| 886 | |
|
|
| 887 | sub new_from_stdio { |
|
|
| 888 | my ($class, $fh) = @_; |
|
|
| 889 | |
|
|
| 890 | my $self = $class->_new ($fh); |
|
|
| 891 | |
|
|
| 892 | # send startup code |
|
|
| 893 | push @{ $self->[QUEUE] }, |
|
|
| 894 | (do "AnyEvent/Fork/serve.pl") |
|
|
| 895 | . <<'EOF'; |
|
|
| 896 | { |
|
|
| 897 | open my $fh, "+<&0" |
|
|
| 898 | or die "AnyEvent::Fork::Serve::stdio: unable to open communications socket: $!\n"; |
|
|
| 899 | open STDIN , ">&2"; |
|
|
| 900 | open STDOUT, ">&2"; |
|
|
| 901 | |
|
|
| 902 | $OWNER = "another process"; |
|
|
| 903 | $0 = "AnyEvent::Fork/stdio of $OWNER"; |
|
|
| 904 | |
|
|
| 905 | @_ = $fh; |
|
|
| 906 | } |
|
|
| 907 | |
|
|
| 908 | &serve; |
|
|
| 909 | __END__ |
|
|
| 910 | EOF |
|
|
| 911 | |
|
|
| 912 | # the data is only sent when the user requests additional things, which |
|
|
| 913 | # is likely early enough for our purposes. |
|
|
| 914 | |
|
|
| 915 | $self |
|
|
| 916 | } |
|
|
| 917 | |
|
|
| 918 | =back |
|
|
| 919 | |
|
|
| 920 | =head2 EXPERIMENTAL METHODS |
854 | =head2 EXPERIMENTAL METHODS |
| 921 | |
855 | |
| 922 | These methods might go away completely or change behaviour, a any time. |
856 | These methods might go away completely or change behaviour, at any time. |
| 923 | |
857 | |
| 924 | =over 4 |
858 | =over 4 |
| 925 | |
859 | |
| 926 | =item $proc->to_fh ($cb->($fh)) # EXPERIMENTAL, MIGHT BE REMOVED |
860 | =item $proc->to_fh ($cb->($fh)) # EXPERIMENTAL, MIGHT BE REMOVED |
| 927 | |
861 | |
