hazptr: cleanup checks for newly retired objects

Summary: Cleanup checks if the current thread has retired objects during bulk reclaim. It does so by flushing the thread local set of retired objects and checking if domain's list of retired objects.

Reviewed By: djwatson

Differential Revision: D8503159

fbshipit-source-id: 59ddd29d8ae1429b62b5bc9511b84e4c9e7128f2

folly/synchronization/HazptrDomain.h

@@ -273,7 +273,12 @@ class hazptr_domain {
       }
       obj = next;
     }
-    bool done = (children.count() == 0);
+#if FOLLY_HAZPTR_THR_LOCAL
+    if (!shutdown_) {
+      hazptr_priv_tls<Atom>().push_all_to_domain();
+    }
+#endif
+    bool done = ((children.count() == 0) && (retired() == nullptr));
     matched.splice(children);
     if (matched.count() > 0) {
       push_retired(matched, false /* don't call bulk_reclaim recursively */);