scheduler starts

source/cell_internal.h

@@ -81,6 +81,7 @@ int actor_interrupt_cb(JSRuntime *rt, cell_rt *crt);
 void actor_loop();
 void actor_initialize(void);
 void actor_free(cell_rt *actor);
+int scheduler_actor_count(void);
 
 uint64_t cell_ns();
 void cell_sleep(double seconds);