next_page_off
final_log_off = next_page_off(log, final_log_off);
hdr_off = next_page_off(log, hdr_off);
nextpage_off = next_page_off(log, curpage_off);
nextpage_off = next_page_off(log, curpage_off);
nextpage_off = next_page_off(log, curpage_off);
vbo = next_page_off(log, vbo);
log->next_page = next_page_off(log, vbo);