Hello,

I came across a cool post by Abigail-II and thought to try it with MCE::Hobo. Thank you, trippledubs for posting the link.

On Windows, MCE::Hobo spawns threads. Otherwise, childrens on Cygwin and other platforms. The following is a demonstration for many hobos, but never more than a fixed number at a given time.

use strict;
use warnings;

use MCE::Hobo;

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Based on http://www.perlmonks.org/?node_id=175715 ( by Abigail-II ).
# Currently, MCE::Hobo emits a message to STDERR if unable to spawn.
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

sub mhobo ($$&) {
  my ($count, $max, $code) = @_;

  foreach my $c (1 .. $count) {
    MCE::Hobo->waitone() unless $c <= $max;
    exit(255) unless defined (my $h = MCE::Hobo->create($code, $c));
  }

  MCE::Hobo->waitall();
}

sub ahobo (\@$&) {
  my ($data, $max, $code) = @_;
  my $c = 0;

  foreach my $data (@$data) {
    MCE::Hobo->waitone() unless ++$c <= $max;
    exit(255) unless defined (my $h = MCE::Hobo->create($code, $data))
+;
  }

  MCE::Hobo->waitall();
}

STDOUT->autoflush(1);   # Perl 5.14 or higher

mhobo 9, 3, sub {
  print $_[0]."\n";
  for (1 .. 4e7) { 1 }  # simulate busy
};

my @input = ( 'a' .. 'i' );

ahobo @input, 3, sub {
  print $_[0]."\n";
  for (1 .. 4e7) { 1 }  # ditto
};

[download]

Regards, Mario.

In reply to Enlighten by Abigail-II's example. Tis a MCE::Hobo demonstration. by marioroy

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