src/share/vm/gc/g1/heapRegion.hpp

rev 8868 : imported patch 8067336-allow-that-plab-allocations-at-end-of-regions-are-flexible
rev 8869 : [mq]: refactor-desired-actual-size
rev 8870 : [mq]: tom-review

*** 107,117 ****
  // The time stamps are re-initialized to zero at cleanup and at Full GCs.
  // The current scheme that uses sequential unsigned ints will fail only if we have 4b
  // evacuation pauses between two cleanups, which is _highly_ unlikely.
  class G1OffsetTableContigSpace: public CompactibleSpace {
    friend class VMStructs;
!   HeapWord* _top;
    HeapWord* volatile _scan_top;
   protected:
    G1BlockOffsetArrayContigSpace _offsets;
    Mutex _par_alloc_lock;
    volatile unsigned _gc_time_stamp;
--- 107,117 ----
  // The time stamps are re-initialized to zero at cleanup and at Full GCs.
  // The current scheme that uses sequential unsigned ints will fail only if we have 4b
  // evacuation pauses between two cleanups, which is _highly_ unlikely.
  class G1OffsetTableContigSpace: public CompactibleSpace {
    friend class VMStructs;
!   HeapWord* volatile _top;
    HeapWord* volatile _scan_top;
   protected:
    G1BlockOffsetArrayContigSpace _offsets;
    Mutex _par_alloc_lock;
    volatile unsigned _gc_time_stamp;
*** 132,142 ****
  
   protected:
    // Reset the G1OffsetTableContigSpace.
    virtual void initialize(MemRegion mr, bool clear_space, bool mangle_space);
  
!   HeapWord** top_addr() { return &_top; }
    // Try to allocate at least min_word_size and up to desired_size from this Space.
    // Returns NULL if not possible, otherwise sets actual_word_size to the amount of
    // space allocated.
    // This version assumes that all allocation requests to this Space are properly
    // synchronized.
--- 132,142 ----
  
   protected:
    // Reset the G1OffsetTableContigSpace.
    virtual void initialize(MemRegion mr, bool clear_space, bool mangle_space);
  
!   HeapWord* volatile* top_addr() { return &_top; }
    // Try to allocate at least min_word_size and up to desired_size from this Space.
    // Returns NULL if not possible, otherwise sets actual_word_size to the amount of
    // space allocated.
    // This version assumes that all allocation requests to this Space are properly
    // synchronized.