136 
 137   STWGCTimer* _gc_timer;
 138 
 139   enum SomeProtectedConstants {
 140     // Generations are GenGrain-aligned and have size that are multiples of
 141     // GenGrain.
 142     MinFreeScratchWords = 100
 143   };
 144 
 145   // Return the size of a survivor space if this generation were of size
 146   // gen_size.
 147   size_t compute_survivor_size(size_t gen_size, size_t alignment) const {
 148     size_t n = gen_size / (SurvivorRatio + 2);
 149     return n > alignment ? align_size_down(n, alignment) : alignment;
 150   }
 151 
 152  public:  // was "protected" but caused compile error on win32
 153   class IsAliveClosure: public BoolObjectClosure {
 154     Generation* _g;
 155   public:

 156     IsAliveClosure(Generation* g);
 157     bool do_object_b(oop p);
 158   };
 159 
 160   class KeepAliveClosure: public OopClosure {
 161   protected:
 162     ScanWeakRefClosure* _cl;
 163     CardTableRS* _rs;
 164     template <class T> void do_oop_work(T* p);
 165   public:
 166     KeepAliveClosure(ScanWeakRefClosure* cl);
 167     virtual void do_oop(oop* p);
 168     virtual void do_oop(narrowOop* p);
 169   };
 170 
 171   class FastKeepAliveClosure: public KeepAliveClosure {
 172   protected:
 173     HeapWord* _boundary;
 174     template <class T> void do_oop_work(T* p);
 175   public:

 136 
 137   STWGCTimer* _gc_timer;
 138 
 139   enum SomeProtectedConstants {
 140     // Generations are GenGrain-aligned and have size that are multiples of
 141     // GenGrain.
 142     MinFreeScratchWords = 100
 143   };
 144 
 145   // Return the size of a survivor space if this generation were of size
 146   // gen_size.
 147   size_t compute_survivor_size(size_t gen_size, size_t alignment) const {
 148     size_t n = gen_size / (SurvivorRatio + 2);
 149     return n > alignment ? align_size_down(n, alignment) : alignment;
 150   }
 151 
 152  public:  // was "protected" but caused compile error on win32
 153   class IsAliveClosure: public BoolObjectClosure {
 154     Generation* _g;
 155   public:
 156     IsAliveClosure() {}
 157     IsAliveClosure(Generation* g);
 158     bool do_object_b(oop p);
 159   };
 160 
 161   class KeepAliveClosure: public OopClosure {
 162   protected:
 163     ScanWeakRefClosure* _cl;
 164     CardTableRS* _rs;
 165     template <class T> void do_oop_work(T* p);
 166   public:
 167     KeepAliveClosure(ScanWeakRefClosure* cl);
 168     virtual void do_oop(oop* p);
 169     virtual void do_oop(narrowOop* p);
 170   };
 171 
 172   class FastKeepAliveClosure: public KeepAliveClosure {
 173   protected:
 174     HeapWord* _boundary;
 175     template <class T> void do_oop_work(T* p);
 176   public: