+ /* Make sure that 'events' is at least as long as the list of changes:
+ * otherwise errors in the changes can get reported as a -1 return
+ * value from kevent() rather than as EV_ERROR events in the events
+ * array.
+ *
+ * (We could instead handle -1 return values from kevent() by
+ * retrying with a smaller changes array or a larger events array,
+ * but this approach seems less risky for now.)
+ */
+ if (kqop->events_size < n_changes) {
+ int new_size = kqop->events_size;
+ do {
+ new_size *= 2;
+ } while (new_size < n_changes);
+
+ kq_grow_events(kqop, new_size);
+ events = kqop->events;
+ }
+