- activities.push_back(boost::dynamic_pointer_cast<Activity>(io));
- return Activity::wait_any_for(activities, timeout);
+ set.push(io);
+
+ auto* ret = set.wait_any_for(timeout).get();
+ for (size_t i = 0; i < ios.size(); i++)
+ if (ios[i].get() == ret)
+ return i;
+
+ return -1;