1 /*
   2  * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_G1_G1SURVIVORREGIONS_HPP
  26 #define SHARE_GC_G1_G1SURVIVORREGIONS_HPP
  27 
  28 #include "gc/g1/g1RegionsOnNodes.hpp"
  29 #include "runtime/globals.hpp"
  30 
  31 template <typename T>
  32 class GrowableArray;
  33 class HeapRegion;
  34 
  35 class G1SurvivorRegions {
  36 private:
  37   GrowableArray<HeapRegion*>* _regions;
  38   volatile size_t             _used_bytes;
  39   G1RegionsOnNodes            _regions_on_node;
  40 
  41 public:
  42   G1SurvivorRegions();
  43 
  44   virtual uint add(HeapRegion* hr);
  45 
  46   void convert_to_eden();
  47 
  48   void clear();
  49 
  50   uint length() const;
  51   uint regions_on_node(uint node_index) const;
  52 
  53   const GrowableArray<HeapRegion*>* regions() const {
  54     return _regions;
  55   }
  56 
  57   // Used bytes of all survivor regions.
  58   size_t used_bytes() const { return _used_bytes; }
  59 
  60   void add_used_bytes(size_t used_bytes);
  61 };
  62 
  63 #endif // SHARE_GC_G1_G1SURVIVORREGIONS_HPP