On Tue, 9 Feb 2010, Jakub Narebski wrote:
[...]
> + my $pid = fork() if ($data && $self->get_background_cache());
> + if (!defined $pid || $pid) {
> + # parent, or didn't fork
> + $data = $p_coderef->($self, $p_key);
> + $self->set($p_key, $data);
> +
> + if ($pid) {
> + # releases lock before waiting and exiting
> + close $lock_fh;
> + # wait for child (which would print) and exit
> + waitpid $pid, 0;
> + exit 0;
> + }
> + } else {
> + # child is to serve stale data
> + return $data;
> + }
[...]
I have decide to rely on $SIG{CHLD} = 'IGNORE' to not generate zombies,
and consistently exit in child (in forked process) and return in parent.
This change would be in next version of this series.
--
Jakub Narebski
Poland
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