while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
if(next_event_date > NOW+min) break;
while ((event=tmgr_history_get_next_event_leq(history, next_event_date,
&value, (void **) &resource_obj))) {
while ((next_event_date = tmgr_history_next_date(history)) != -1.0) {
if(next_event_date > NOW+min) break;
while ((event=tmgr_history_get_next_event_leq(history, next_event_date,
&value, (void **) &resource_obj))) {