src/share/vm/jfr/recorder/storage/jfrStorageUtils.hpp

rev 9053 : 8220293: Deadlock in JFR string pool
Reviewed-by: rehn, egahlin

@@ -90,11 +90,10 @@
   ConcurrentWriteOpExcludeRetired(Operation& operation) : ConcurrentWriteOp<Operation>(operation) {}
   bool process(Type* t);
   size_t processed() const { return ConcurrentWriteOp<Operation>::processed(); }
 };
 
-
 template <typename Operation>
 class MutexedWriteOp {
  private:
   Operation& _operation;
  public:

@@ -102,10 +101,19 @@
   MutexedWriteOp(Operation& operation) : _operation(operation) {}
   bool process(Type* t);
   size_t processed() const { return _operation.processed(); }
 };
 
+template <typename Operation>
+class ExclusiveOp : private MutexedWriteOp<Operation> {
+ public:
+  typedef typename Operation::Type Type;
+  ExclusiveOp(Operation& operation) : MutexedWriteOp<Operation>(operation) {}
+  bool process(Type* t);
+  size_t processed() const { return MutexedWriteOp<Operation>::processed(); }
+};
+
 enum jfr_operation_mode {
   mutexed = 1,
   concurrent
 };