Portable version using P9Y::ProcessTable ... it works on win32 , probably works on other OS if par works the same there

BEGIN {
    my $PAR_PROGNAME = "$ENV{PAR_TEMP}\\$ENV{PAR_ARGV_0}.exe"; ## hack
    use P9Y::ProcessTable();
    my $perl_process  = P9Y::ProcessTable->process;
    my $parentpid      = $perl_process->ppid;
    my $ExecutablePath = $perl_process->{exe};
    undef $perl_process  ;
    no P9Y::ProcessTable();
    sub IsParParentAlive {
        (
            $PAR_PROGNAME eq $ExecutablePath  ## doublecheck
            or
            $ENV{PAR_SPAWNED}
        )
        and kill 0, $parentpid;
    }
}
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