1 /*
   2  * Copyright (c) 2016, 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_G1HEAPTRANSITION_HPP
  26 #define SHARE_GC_G1_G1HEAPTRANSITION_HPP
  27 
  28 #include "gc/shared/plab.hpp"
  29 #include "memory/metaspace/metaspaceSizesSnapshot.hpp"
  30 
  31 class G1CollectedHeap;
  32 
  33 class G1HeapTransition {
  34   struct Data {
  35     size_t _eden_length;
  36     size_t _survivor_length;
  37     size_t _old_length;
  38     size_t _archive_length;
  39     size_t _humongous_length;
  40     const metaspace::MetaspaceSizesSnapshot _meta_sizes;
  41 
  42     // Only includes current eden regions.
  43     uint* _eden_length_per_node;
  44     // Only includes current survivor regions.
  45     uint* _survivor_length_per_node;
  46 
  47     Data(G1CollectedHeap* g1_heap);
  48     ~Data();
  49   };
  50 
  51   G1CollectedHeap* _g1_heap;
  52   Data _before;
  53 
  54 public:
  55   G1HeapTransition(G1CollectedHeap* g1_heap);
  56 
  57   void print();
  58 };
  59 
  60 #endif // SHARE_GC_G1_G1HEAPTRANSITION_HPP