src/hotspot/share/classfile/compactHashtable.hpp

*** 300,10 ***
--- 300,30 ---
          }
        }
      }
    }
  
+   template<typename Function>
+   inline void iterate(Function function) const { // lambda enabled API
+     for (u4 i = 0; i < _bucket_count; i++) {
+       u4 bucket_info = _buckets[i];
+       u4 bucket_offset = BUCKET_OFFSET(bucket_info);
+       int bucket_type = BUCKET_TYPE(bucket_info);
+       u4* entry = _entries + bucket_offset;
+ 
+       if (bucket_type == VALUE_ONLY_BUCKET_TYPE) {
+         function(decode(entry[0]));
+       } else {
+         u4* entry_max = _entries + BUCKET_OFFSET(_buckets[i + 1]);
+         while (entry < entry_max) {
+           function(decode(entry[1]));
+           entry += 2;
+         }
+       }
+     }
+   }
+ 
    void print_table_statistics(outputStream* st, const char* name) {
      st->print_cr("%s statistics:", name);
      int total_entries = 0;
      int max_bucket = 0;
      for (u4 i = 0; i < _bucket_count; i++) {