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 #ifndef SHARE_GC_Z_ZARRAY_HPP
  25 #define SHARE_GC_Z_ZARRAY_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 #include "utilities/globalDefinitions.hpp"
  29 
  30 template <typename T>
  31 class ZArray {
  32 private:
  33   static const size_t initial_capacity = 32;
  34 
  35   T*     _array;
  36   size_t _size;
  37   size_t _capacity;
  38 
  39   NONCOPYABLE(ZArray);
  40 
  41   void expand(size_t new_capacity);
  42 
  43 public:
  44   ZArray();
  45   ~ZArray();
  46 
  47   size_t size() const;
  48   bool is_empty() const;
  49 
  50   T at(size_t index) const;
  51 
  52   void add(T value);
  53   void transfer(ZArray<T>* from);
  54   void clear();
  55 };
  56 
  57 template <typename T, bool parallel>
  58 class ZArrayIteratorImpl : public StackObj {
  59 private:
  60   ZArray<T>* const _array;
  61   size_t           _next;
  62 
  63 public:
  64   ZArrayIteratorImpl(ZArray<T>* array);
  65 
  66   bool next(T* elem);
  67 };
  68 
  69 // Iterator types
  70 #define ZARRAY_SERIAL      false
  71 #define ZARRAY_PARALLEL    true
  72 
  73 template <typename T>
  74 class ZArrayIterator : public ZArrayIteratorImpl<T, ZARRAY_SERIAL> {
  75 public:
  76   ZArrayIterator(ZArray<T>* array);
  77 };
  78 
  79 template <typename T>
  80 class ZArrayParallelIterator : public ZArrayIteratorImpl<T, ZARRAY_PARALLEL> {
  81 public:
  82   ZArrayParallelIterator(ZArray<T>* array);
  83 };
  84 
  85 #endif // SHARE_GC_Z_ZARRAY_HPP