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 
  29 template <typename T>
  30 class ZArray {
  31 private:
  32   static const size_t initial_capacity = 32;
  33 
  34   T*     _array;
  35   size_t _size;
  36   size_t _capacity;
  37 
  38   // Copy and assignment are not allowed
  39   ZArray(const ZArray<T>& array);
  40   ZArray<T>& operator=(const ZArray<T>& array);
  41 
  42   void expand(size_t new_capacity);
  43 
  44 public:
  45   ZArray();
  46   ~ZArray();
  47 
  48   size_t size() const;
  49   bool is_empty() const;
  50 
  51   T at(size_t index) const;
  52 
  53   void add(T value);
  54   void transfer(ZArray<T>* from);
  55   void clear();
  56 };
  57 
  58 template <typename T, bool parallel>
  59 class ZArrayIteratorImpl : public StackObj {
  60 private:
  61   ZArray<T>* const _array;
  62   size_t           _next;
  63 
  64 public:
  65   ZArrayIteratorImpl(ZArray<T>* array);
  66 
  67   bool next(T* elem);
  68 };
  69 
  70 // Iterator types
  71 #define ZARRAY_SERIAL      false
  72 #define ZARRAY_PARALLEL    true
  73 
  74 template <typename T>
  75 class ZArrayIterator : public ZArrayIteratorImpl<T, ZARRAY_SERIAL> {
  76 public:
  77   ZArrayIterator(ZArray<T>* array);
  78 };
  79 
  80 template <typename T>
  81 class ZArrayParallelIterator : public ZArrayIteratorImpl<T, ZARRAY_PARALLEL> {
  82 public:
  83   ZArrayParallelIterator(ZArray<T>* array);
  84 };
  85 
  86 #endif // SHARE_GC_Z_ZARRAY_HPP