src/share/vm/oops/oop.hpp

rev 7183 : autospecialized oop_iterate using SFINAE and templates

@@ -25,14 +25,15 @@
 #ifndef SHARE_VM_OOPS_OOP_HPP
 #define SHARE_VM_OOPS_OOP_HPP
 
 #include "memory/iterator.hpp"
 #include "memory/memRegion.hpp"
-#include "memory/specialized_oop_closures.hpp"
+#include "memory/specialized_oop_closures.inline.hpp"
 #include "oops/metadata.hpp"
 #include "utilities/macros.hpp"
 #include "utilities/top.hpp"
+#include "utilities/templateIdioms.hpp"
 
 // oopDesc is the top baseclass for objects classes.  The {name}Desc classes describe
 // the format of Java objects so the fields can be accessed from C++.
 // oopDesc is abstract.
 // (see oopHierarchy for complete oop class hierarchy)

@@ -334,11 +335,34 @@
 
   // Fast access to barrier set
   static BarrierSet* bs()            { return _bs; }
   static void set_bs(BarrierSet* bs) { _bs = bs; }
 
+private:
+  // Dispatch member functions to oop closures
+
+  template <class OopClosureType>
+  typename enable_if<is_kind_of<ExtendedOopClosure, OopClosureType>::value, void>::type
+  do_metadata_if_applicable(OopClosureType *cl);
+
+  template <class OopClosureType>
+  typename enable_if<!is_kind_of<ExtendedOopClosure, OopClosureType>::value, void>::type
+  do_metadata_if_applicable(OopClosureType *cl);
+
+  template <class OopClosureType>
+  int oop_iterate_dispatch_tag(OopClosureType *blk, DispatchTag tag);
+
+  template <class OopClosureType>
+  int oop_iterate_internal(OopClosureType *blk);
+
+public:
+  template <class OopClosureType>
+  typename enable_if<is_kind_of<ExtendedOopClosure, OopClosureType>::value, int>::type
+  oop_iterate(OopClosureType *blk);
+
   // iterators, returns size of object
+
 #define OOP_ITERATE_DECL(OopClosureType, nv_suffix)                      \
   int oop_iterate(OopClosureType* blk);                                  \
   int oop_iterate(OopClosureType* blk, MemRegion mr);  // Only in mr.
 
   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_DECL)

@@ -351,11 +375,14 @@
 
   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_BACKWARDS_DECL)
   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_ITERATE_BACKWARDS_DECL)
 #endif
 
-  int oop_iterate_no_header(OopClosure* bk);
+  template <class OopClosureType>
+  typename enable_if<is_kind_of<OopClosure, OopClosureType>::value, int>::type
+  oop_iterate_no_header(OopClosureType* bk);
+  
   int oop_iterate_no_header(OopClosure* bk, MemRegion mr);
 
   // identity hash; returns the identity hash key (computes it if necessary)
   // NOTE with the introduction of UseBiasedLocking that identity_hash() might reach a
   // safepoint if called on a biased object. Calling code must be aware of that.