Hi Skeeve,

Update: Ah, the OP wants to read DATA independently. See tybalt89's solution.

Update: Currently, the following demo works on Unix platforms with IO::FDPass: automatically loaded by MCE::Shared if present in Perl. The next update to MCE::Shared on CPAN will support reading from the DATA handle without involving IO::FDPass and work on Windows including Cygwin.

MCE::Shared is not exclusive to only MCE parallel modules: e.g. MCE, MCE::Flow, MCE::Hobo, and etcetera. MCE::Shared also works with threads, even fork shown below, and other parallel modules found on metacpan.

Code

use strict;
use warnings;
use MCE::Shared;

mce_open my $shared_fh, '<', \*DATA;

my $pid= fork();
die unless defined $pid;

if ($pid == 0) {
  print "Start Child\n";
  while (<$shared_fh>) {
    print "C: $_"; sleep 1;
  }
  print "Stop Child\n";
}
else {
  print "Start Parent\n";
  while (<$shared_fh>) {
    print "P: $_"; sleep 1;
  }
  print "Stop Parent\n";
}

__DATA__
a
b
c
d
e
f
g
h
i
j

[download]

Output

Start Parent
Start Child
P: a
C: b
C: c
P: d
C: e
P: f
C: g
P: h
C: i
P: j
Stop Child
Stop Parent

[download]

Regards, Mario

In reply to Re: How can I read DATA in parent and child? by marioroy
in thread How can I read DATA in parent and child? by Skeeve

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