src/share/vm/gc/g1/g1InCSetState.hpp

rev 9605 : imported patch in-cset-ext

*** 53,62 ****
--- 53,63 ----
      // frequency of the checks.
      // The most common check is whether the region is in the collection set or not,
      // this encoding allows us to use an > 0 check.
      // The other values are simply encoded in increasing generation order, which
      // makes getting the next generation fast by a simple increment.
+     Ext          = -2,    // Extension point
      Humongous    = -1,    // The region is humongous
      NotInCSet    =  0,    // The region is not in the collection set.
      Young        =  1,    // The region is in the collection set and a young region.
      Old          =  2,    // The region is in the collection set and an old region.
      Num
*** 74,87 ****
    bool is_in_cset() const              { return _value > NotInCSet; }
  
    bool is_humongous() const            { return _value == Humongous; }
    bool is_young() const                { return _value == Young; }
    bool is_old() const                  { return _value == Old; }
  
  #ifdef ASSERT
!   bool is_default() const              { return !is_in_cset_or_humongous(); }
!   bool is_valid() const                { return (_value >= Humongous) && (_value < Num); }
    bool is_valid_gen() const            { return (_value >= Young && _value <= Old); }
  #endif
  };
  
  // Instances of this class are used for quick tests on whether a reference points
--- 75,89 ----
    bool is_in_cset() const              { return _value > NotInCSet; }
  
    bool is_humongous() const            { return _value == Humongous; }
    bool is_young() const                { return _value == Young; }
    bool is_old() const                  { return _value == Old; }
+   bool is_ext() const                  { return _value == Ext; }
  
  #ifdef ASSERT
!   bool is_default() const              { return _value == NotInCSet; }
!   bool is_valid() const                { return (_value >= Ext) && (_value < Num); }
    bool is_valid_gen() const            { return (_value >= Young && _value <= Old); }
  #endif
  };
  
  // Instances of this class are used for quick tests on whether a reference points
*** 103,112 ****
--- 105,120 ----
      assert(get_by_index(index).is_default(),
             "State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value());
      set_by_index(index, InCSetState::Humongous);
    }
  
+   void set_ext(uintptr_t index) {
+     assert(get_by_index(index).is_default(),
+            "State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value());
+     set_by_index(index, InCSetState::Ext);
+   }
+ 
    void clear_humongous(uintptr_t index) {
      set_by_index(index, InCSetState::NotInCSet);
    }
  
    void set_in_young(uintptr_t index) {