chore(watchdog_timer): add explanatory comment

tier4 · Jun 6, 2024 · 7f53f06 · 7f53f06
1 parent ae0e291
commit 7f53f06
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/nebula_ros/include/nebula_ros/common/watchdog_timer.hpp b/nebula_ros/include/nebula_ros/common/watchdog_timer.hpp
@@ -36,6 +36,8 @@ class WatchdogTimer
   {
     uint64_t now_ns = node_.get_clock()->now().nanoseconds();
 
+    // As the clock is not steady, the update timestamp can be newer than clock.now().
+    // Define that edge-case as not being late too.
     bool is_late = (last_update_ns_ > now_ns)
                      ? false
                      : (now_ns - last_update_ns_) > expected_update_interval_ns_;