1 /*
   2  * Copyright (c) 2017, 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 #ifndef SHARE_GC_Z_ZRELOCATIONSET_HPP
  25 #define SHARE_GC_Z_ZRELOCATIONSET_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 
  29 class ZPage;
  30 
  31 class ZRelocationSet VALUE_OBJ_CLASS_SPEC {
  32   template <bool> friend class ZRelocationSetIteratorImpl;
  33 
  34 private:
  35   ZPage** _pages;
  36   size_t  _npages;
  37 
  38 public:
  39   ZRelocationSet();
  40 
  41   void populate(const ZPage* const* group0, size_t ngroup0,
  42                 const ZPage* const* group1, size_t ngroup1);
  43 };
  44 
  45 template <bool parallel>
  46 class ZRelocationSetIteratorImpl : public StackObj {
  47 private:
  48   ZRelocationSet* const _relocation_set;
  49   size_t                _next;
  50 
  51 public:
  52   ZRelocationSetIteratorImpl(ZRelocationSet* relocation_set);
  53 
  54   bool next(ZPage** page);
  55 };
  56 
  57 // Iterator types
  58 #define ZRELOCATIONSET_SERIAL      false
  59 #define ZRELOCATIONSET_PARALLEL    true
  60 
  61 class ZRelocationSetIterator : public ZRelocationSetIteratorImpl<ZRELOCATIONSET_SERIAL> {
  62 public:
  63   ZRelocationSetIterator(ZRelocationSet* relocation_set) :
  64       ZRelocationSetIteratorImpl<ZRELOCATIONSET_SERIAL>(relocation_set) {}
  65 };
  66 
  67 class ZRelocationSetParallelIterator : public ZRelocationSetIteratorImpl<ZRELOCATIONSET_PARALLEL> {
  68 public:
  69   ZRelocationSetParallelIterator(ZRelocationSet* relocation_set) :
  70       ZRelocationSetIteratorImpl<ZRELOCATIONSET_PARALLEL>(relocation_set) {}
  71 };
  72 
  73 #endif // SHARE_GC_Z_ZRELOCATIONSET_HPP