private void wait_until_safe() {
while (!safe_modify) {
// loop until safe to modify;
try {
Thread.sleep(1);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public void update() {
// execute orders
safe_modify = false;
try {
Thread.sleep(1);
} catch (Exception ex) {
}
;
for (Spatial_Order order : orders) {
try {
execute(order);
} catch (Exception ex) {
}
;
}
orders.clear();
safe_modify = true;
}