130   public:

   130   public:

   131     G1ResetScanTopClosure(HeapWord** scan_top) : _scan_top(scan_top) { }

   131     G1ResetScanTopClosure(HeapWord** scan_top) : _scan_top(scan_top) { }

   132 

   132 

   133     virtual bool do_heap_region(HeapRegion* r) {

   133     virtual bool do_heap_region(HeapRegion* r) {

   134       uint hrm_index = r->hrm_index();

   134       uint hrm_index = r->hrm_index();

   136         _scan_top[hrm_index] = r->top();

   136         _scan_top[hrm_index] = r->top();

   137       } else {

   137       } else {

   138         _scan_top[hrm_index] = r->bottom();

   138         _scan_top[hrm_index] = r->bottom();

   139       }

   139       }

   140       return false;

   140       return false;

   569   // worst, we end up processing a stale card unnecessarily.

   569   // worst, we end up processing a stale card unnecessarily.

   570   //

   570   //

   571   // In the normal (non-stale) case, the synchronization between the

   571   // In the normal (non-stale) case, the synchronization between the

   572   // enqueueing of the card and processing it here will have ensured

   572   // enqueueing of the card and processing it here will have ensured

   573   // we see the up-to-date region type here.

   573   // we see the up-to-date region type here.

   575     return;

   575     return;

   576   }

   576   }

   577 

   577 

   578   // The result from the hot card cache insert call is either:

   578   // The result from the hot card cache insert call is either:

   579   //   * pointer to the current card

   579   //   * pointer to the current card

   598       r = _g1h->heap_region_containing(start);

   598       r = _g1h->heap_region_containing(start);

   599 

   599 

   600       // Check whether the region formerly in the cache should be

   600       // Check whether the region formerly in the cache should be

   601       // ignored, as discussed earlier for the original card.  The

   601       // ignored, as discussed earlier for the original card.  The

   602       // region could have been freed while in the cache.

   602       // region could have been freed while in the cache.

   604         return;

   604         return;

   605       }

   605       }

   606     } // Else we still have the original card.

   606     } // Else we still have the original card.

   607   }

   607   }

   608 

   608