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
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  24 
  25 #ifndef SHARE_GC_G1_G1EDENREGIONS_HPP
  26 #define SHARE_GC_G1_G1EDENREGIONS_HPP
  27 
  28 #include "gc/g1/heapRegion.hpp"
  29 #include "runtime/globals.hpp"
  30 #include "utilities/debug.hpp"
  31 
  32 class G1EdenRegions {
  33 private:
  34   int    _length;
  35   // Sum of used bytes from all retired eden regions.
  36   // I.e. updated when mutator regions are retired.
  37   volatile size_t _used_bytes;
  38 
  39 public:
  40   G1EdenRegions() : _length(0), _used_bytes(0) { }
  41 
  42   void add(HeapRegion* hr) {
  43     assert(!hr->is_eden(), "should not already be set");
  44     _length++;
  45   }
  46 
  47   void clear() { _length = 0; _used_bytes = 0; }
  48 
  49   uint length() const { return _length; }
  50 
  51   size_t used_bytes() const { return _used_bytes; }
  52 
  53   void add_used_bytes(size_t used_bytes) {
  54     _used_bytes += used_bytes;
  55   }
  56 };
  57 
  58 #endif // SHARE_GC_G1_G1EDENREGIONS_HPP
--- EOF ---