122 

   122 

   123   // Size computations.  Sizes are in heapwords.

   123   // Size computations.  Sizes are in heapwords.

   124   virtual size_t used_in_words() const                    { return pointer_delta(top(), bottom()); }

   124   virtual size_t used_in_words() const                    { return pointer_delta(top(), bottom()); }

   125   virtual size_t free_in_words() const                    { return pointer_delta(end(),    top()); }

   125   virtual size_t free_in_words() const                    { return pointer_delta(end(),    top()); }

   126   virtual size_t tlab_capacity(Thread* thr) const         { return capacity_in_bytes();            }

   126   virtual size_t tlab_capacity(Thread* thr) const         { return capacity_in_bytes();            }

   127   virtual size_t unsafe_max_tlab_alloc(Thread* thr) const { return free_in_bytes();                }

   128   virtual size_t unsafe_max_tlab_alloc(Thread* thr) const { return free_in_bytes();                }

   128 

   129 

   129   // Allocation (return NULL if full)

   130   // Allocation (return NULL if full)

   130   virtual HeapWord* allocate(size_t word_size);

   131   virtual HeapWord* allocate(size_t word_size);

   131   virtual HeapWord* cas_allocate(size_t word_size);

   132   virtual HeapWord* cas_allocate(size_t word_size);