+}
+
+void backend_set_state(struct io_conn *conn, struct io_op *op)
+{
+ enum io_state state = from_ioop(op);
+ struct pollfd *pfd = &pollfds[conn->fd.backend_info];
+
+ pfd->events = pollmask(state);
+ if (conn->duplex) {
+ int mask = pollmask(conn->duplex->state);
+ /* You can't *both* read/write. */
+ assert(!mask || pfd->events != mask);
+ pfd->events |= mask;
+ }
+
+ if (state == NEXT)
+ num_next++;
+ else if (state == FINISHED)
+ num_finished++;
+