1 /*
   2  * Copyright (c) 2018, 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.
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  24 
  25 #ifndef SHARE_GC_G1_G1OOPSTARCHUNKEDLIST_HPP
  26 #define SHARE_GC_G1_G1OOPSTARCHUNKEDLIST_HPP
  27 
  28 #include "oops/oopsHierarchy.hpp"
  29 #include "utilities/chunkedList.hpp"
  30 
  31 class OopClosure;
  32 
  33 class G1OopStarChunkedList : public CHeapObj<mtGC> {
  34   size_t _used_memory;
  35 
  36   ChunkedList<oop*, mtGC>* _roots;
  37   ChunkedList<narrowOop*, mtGC>* _croots;
  38   ChunkedList<oop*, mtGC>* _oops;
  39   ChunkedList<narrowOop*, mtGC>* _coops;
  40 
  41   template <typename T> void delete_list(ChunkedList<T*, mtGC>* c);
  42 
  43   template <typename T>
  44   size_t chunks_do(ChunkedList<T*, mtGC>* head,
  45                    OopClosure* cl);
  46 
  47   template <typename T>
  48   inline void push(ChunkedList<T*, mtGC>** field, T* p);
  49 
  50  public:
  51   G1OopStarChunkedList() : _used_memory(0), _roots(NULL), _croots(NULL), _oops(NULL), _coops(NULL) {}
  52   ~G1OopStarChunkedList();
  53 
  54   size_t used_memory() { return _used_memory; }
  55 
  56   size_t oops_do(OopClosure* obj_cl, OopClosure* root_cl);
  57 
  58   inline void push_oop(oop* p);
  59   inline void push_oop(narrowOop* p);
  60   inline void push_root(oop* p);
  61   inline void push_root(narrowOop* p);
  62 };
  63 
  64 #endif // SHARE_GC_G1_G1OOPSTARCHUNKEDLIST_HPP