src/hotspot/share/utilities/concurrentHashTable.hpp

rev 52316 : 8185525: Add JFR event for DictionarySizes
Summary: Added TableStatistics event
Reviewed-by: egahlin, coleenp

@@ -23,10 +23,12 @@
  */
 
 #ifndef SHARE_UTILITIES_CONCURRENT_HASH_TABLE_HPP
 #define SHARE_UTILITIES_CONCURRENT_HASH_TABLE_HPP
 
+#include "utilities/tableStatistics.hpp"
+
 // A mostly concurrent-hash-table where the read-side is wait-free, inserts are
 // CAS and deletes mutual exclude each other on per bucket-basis. VALUE is the
 // type kept inside each Node and CONFIG contains hash and allocation methods.
 // A CALLBACK_FUNC and LOOKUP_FUNC needs to be provided for get and insert.
 

@@ -371,10 +373,11 @@
   ConcurrentHashTable(size_t log2size = DEFAULT_START_SIZE_LOG2,
                       size_t log2size_limit = DEFAULT_MAX_SIZE_LOG2,
                       size_t grow_hint = DEFAULT_GROW_HINT);
 
   ~ConcurrentHashTable();
+  TableRateStatistics _stats_rate;
 
   size_t get_size_log2(Thread* thread);
   size_t get_node_size() const { return sizeof(Node); }
   bool is_max_size_reached() { return _size_limit_reached; }
 

@@ -476,10 +479,19 @@
   // Destroying items matching EVALUATE_FUNC, before destroying items
   // DELETE_FUNC is called, when the resize lock is successfully obtained.
   template <typename EVALUATE_FUNC, typename DELETE_FUNC>
   void bulk_delete(Thread* thread, EVALUATE_FUNC& eval_f, DELETE_FUNC& del_f);
 
+  // Calcuate statistics. Item sizes are calculated with VALUE_SIZE_FUNC.
+  template <typename VALUE_SIZE_FUNC>
+  TableStatistics statistics_calculate(Thread* thread, VALUE_SIZE_FUNC& vs_f);
+
+  // Gets statistics if available, if not return old one. Item sizes are calculated with
+  // VALUE_SIZE_FUNC.
+  template <typename VALUE_SIZE_FUNC>
+  TableStatistics statistics_get(Thread* thread, VALUE_SIZE_FUNC& vs_f, TableStatistics old);
+
   // Writes statistics to the outputStream. Item sizes are calculated with
   // VALUE_SIZE_FUNC.
   template <typename VALUE_SIZE_FUNC>
   void statistics_to(Thread* thread, VALUE_SIZE_FUNC& vs_f, outputStream* st,
                      const char* table_name);