g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
g_return_if_fail (page >= 0 && page < page_cache->n_pages);
if (page_cache->uniform) {
g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
g_return_if_fail (page >= 0 && page < page_cache->n_pages);
if (page_cache->uniform) {