164   // Some barrier sets create tables whose elements correspond to parts of
 165   // the heap; the CardTableModRefBS is an example.  Such barrier sets will
 166   // normally reserve space for such tables, and commit parts of the table
 167   // "covering" parts of the heap that are committed.  The constructor is
 168   // passed the maximum number of independently committable subregions to
 169   // be covered, and the "resize_covoered_region" function allows the
 170   // sub-parts of the heap to inform the barrier set of changes of their
 171   // sizes.
 172   BarrierSet(int max_covered_regions) :
 173     _max_covered_regions(max_covered_regions) {}
 174 
 175   // Inform the BarrierSet that the the covered heap region that starts
 176   // with "base" has been changed to have the given size (possibly from 0,
 177   // for initialization.)
 178   virtual void resize_covered_region(MemRegion new_region) = 0;
 179 
 180   // If the barrier set imposes any alignment restrictions on boundaries
 181   // within the heap, this function tells whether they are met.
 182   virtual bool is_aligned(HeapWord* addr) = 0;
 183 


 184 };
 185 
 186 #endif // SHARE_VM_MEMORY_BARRIERSET_HPP

 164   // Some barrier sets create tables whose elements correspond to parts of
 165   // the heap; the CardTableModRefBS is an example.  Such barrier sets will
 166   // normally reserve space for such tables, and commit parts of the table
 167   // "covering" parts of the heap that are committed.  The constructor is
 168   // passed the maximum number of independently committable subregions to
 169   // be covered, and the "resize_covoered_region" function allows the
 170   // sub-parts of the heap to inform the barrier set of changes of their
 171   // sizes.
 172   BarrierSet(int max_covered_regions) :
 173     _max_covered_regions(max_covered_regions) {}
 174 
 175   // Inform the BarrierSet that the the covered heap region that starts
 176   // with "base" has been changed to have the given size (possibly from 0,
 177   // for initialization.)
 178   virtual void resize_covered_region(MemRegion new_region) = 0;
 179 
 180   // If the barrier set imposes any alignment restrictions on boundaries
 181   // within the heap, this function tells whether they are met.
 182   virtual bool is_aligned(HeapWord* addr) = 0;
 183 
 184   // Print a description of the memory for the barrier set
 185   virtual void print_on(outputStream* st) const = 0;
 186 };
 187 
 188 #endif // SHARE_VM_MEMORY_BARRIERSET_HPP