+sub DESTROY {
+ my ($self) = @_;
+ delete $self->{dbh};
+ my $f = delete $self->{tmp_name};
+ if (defined $f && $self->{pid} == $$) {
+ unlink $f or warn "failed to unlink $f: $!\n";
+ }
+}
+
+sub atfork_parent {
+ my ($self) = @_;
+ my $f = $self->{tmp_name} or die "not a temporary clone\n";
+ delete $self->{dbh} and die "tmp_clone dbh not prepared for parent";
+ my $dbh = $self->{dbh} = dbh_new($f, 1);
+ $dbh->do('PRAGMA synchronous = OFF');
+}
+
+sub atfork_prepare {
+ my ($self) = @_;
+ my $f = $self->{tmp_name} or die "not a temporary clone\n";
+ $self->{pid} == $$ or
+ die "BUG: atfork_prepare not called from $self->{pid}\n";
+ $self->{dbh} or die "temporary clone not open\n";
+ # must clobber prepared statements
+ %$self = (tmp_name => $f, pid => $$);
+}
+