check process module permission

[Spica]

I have some process Modules with own permission per module and assigned them to admin pages. Is it possible, to check by api if a user has access to one or all of these pages/processmodules? I only find how to check if a user has a certain permission. But what if I want to check generally if he has access, without knowledge of its permissions, e.g. to redirect to another page?

[Spica]

I now solved it like this

    //search the first viewable child and redirect
    public function ___execute() {
        $moduleChildren = $this->page->children;
        foreach ($moduleChildren as $modulechild) {
             if ($modulechild->viewable()) {
                $this->session->redirect($modulechild->url);
                return;
            }
        }
    }