gol: Use EventLoop timers

apps/gol.cpp

@@ -101,6 +101,13 @@ static void next_generation()
     for (isize i = 0; i < (g_num_rows * g_num_columns); i++) g_cells[i].state = g_cells[i].new_state;
 }
 
+static void update()
+{
+    next_generation();
+    draw_cells();
+    os::EventLoop::the().register_timer(100, update);
+}
+
 Result<int> luna_main(int argc, char** argv)
 {
     ui::App app;
@@ -112,20 +119,7 @@ Result<int> luna_main(int argc, char** argv)
 
     TRY(fill_cells());
 
-    int counter = 0;
+    os::EventLoop::the().register_timer(100, update);
 
-    while (app.process_events())
+    return app.run();
-    {
-        if (counter >= 10)
-        {
-            next_generation();
-            draw_cells();
-            counter = 0;
-        }
-        else
-            counter++;
-        usleep(10000);
-    }
-
-    return 0;
 }