718     const struct event_change *change)  argument
721 	if (change->read_change & EV_CHANGE_SIGNAL) {
723 		GET_SIGNAL_SLOT(ctx, &base->sigmap, change->fd, evmap_signal);
727 		GET_IO_SLOT(ctx, &base->io, change->fd, evmap_io);
840 	struct event_change *change;  local
852 		change = &changelist->changes[idx];
855 		memset(change, 0, sizeof(struct event_change));
856 		change->fd = fd;
857 		change->old_events = old_events;
859 		change = &changelist->changes[fdinfo->idxplus1 - 1];
860 		EVUTIL_ASSERT(change->fd == fd);
862 	return change;
871 	struct event_change *change;  local
876 	change = event_changelist_get_or_construct(changelist, fd, old, fdinfo);
877 	if (!change)
885 		change->read_change = evchange;
887 		change->write_change = evchange;
889 		change->close_change = evchange;
901 	struct event_change *change;  local
905 	change = event_changelist_get_or_construct(changelist, fd, old, fdinfo);
907 	if (!change)
926 		if (!(change->old_events & (EV_READ | EV_SIGNAL)))
927 			change->read_change = 0;
929 			change->read_change = del;
932 		if (!(change->old_events & EV_WRITE))
933 			change->write_change = 0;
935 			change->write_change = del;
938 		if (!(change->old_events & EV_CLOSED))
939 			change->close_change = 0;
941 			change->close_change = del;