129 
 130   // Informs the RS that the given memregion contains no references to
 131   // younger generations.
 132   virtual void clear(MemRegion mr) = 0;
 133 
 134   // Informs the RS that there are no references to generations
 135   // younger than gen from generations gen and older.
 136   // The parameter clear_perm indicates if the perm_gen's
 137   // remembered set should also be processed/cleared.
 138   virtual void clear_into_younger(Generation* gen) = 0;
 139 
 140   // Informs the RS that refs in the given "mr" may have changed
 141   // arbitrarily, and therefore may contain old-to-young pointers.
 142   // If "whole heap" is true, then this invalidation is part of an
 143   // invalidation of the whole heap, which an implementation might
 144   // handle differently than that of a sub-part of the heap.
 145   virtual void invalidate(MemRegion mr, bool whole_heap = false) = 0;
 146 
 147   // Informs the RS that refs in this generation
 148   // may have changed arbitrarily, and therefore may contain
 149   // old-to-young pointers in arbitrary locations. The parameter
 150   // younger indicates if the same should be done for younger generations
 151   // as well. The parameter perm indicates if the same should be done for
 152   // perm gen as well.
 153   virtual void invalidate_or_clear(Generation* gen, bool younger) = 0;
 154 };
 155 
 156 #endif // SHARE_VM_MEMORY_GENREMSET_HPP

 129 
 130   // Informs the RS that the given memregion contains no references to
 131   // younger generations.
 132   virtual void clear(MemRegion mr) = 0;
 133 
 134   // Informs the RS that there are no references to generations
 135   // younger than gen from generations gen and older.
 136   // The parameter clear_perm indicates if the perm_gen's
 137   // remembered set should also be processed/cleared.
 138   virtual void clear_into_younger(Generation* gen) = 0;
 139 
 140   // Informs the RS that refs in the given "mr" may have changed
 141   // arbitrarily, and therefore may contain old-to-young pointers.
 142   // If "whole heap" is true, then this invalidation is part of an
 143   // invalidation of the whole heap, which an implementation might
 144   // handle differently than that of a sub-part of the heap.
 145   virtual void invalidate(MemRegion mr, bool whole_heap = false) = 0;
 146 
 147   // Informs the RS that refs in this generation
 148   // may have changed arbitrarily, and therefore may contain
 149   // old-to-young pointers in arbitrary locations.
 150   virtual void invalidate_or_clear(Generation* gen) = 0;



 151 };
 152 
 153 #endif // SHARE_VM_MEMORY_GENREMSET_HPP