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#!/usr/bin/perl -w
use lib '.';
use strict;
use Parallel::ForkManager;
my $max_procs = 3;
my @names = qw( Fred Jim Lily Steve Jessica Bob );
# hash to resolve PID's back to child specific information
my $pm = Parallel::ForkManager->new($max_procs);
# Setup a callback for when a child finishes up so we can
# get it's exit code
$pm->run_on_finish(
sub { my ($pid, $exit_code, $ident) = @_;
print "** $ident just got out of the pool ".
"with PID $pid and exit code: $exit_code\n";
}
);
$pm->run_on_start(
sub { my ($pid,$ident)=@_;
print "** $ident started, pid: $pid\n";
}
);
$pm->run_on_wait(
sub {
print "** Have to wait for one children ...\n"
},
0.5,
);
foreach my $child ( 0 .. $#names ) {
my $pid = $pm->start($names[$child]) and next;
# This code is the child process
print "This is $names[$child], Child number $child\n";
sleep ( 2 * $child );
print "$names[$child], Child $child is about to get out...\n";
sleep 1;
$pm->finish($child); # pass an exit code to finish
}
print "Waiting for Children...\n";
$pm->wait_all_children;
print "Everybody is out of the pool!\n";
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