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_INLINE_HPP
  25 #define SHARE_GC_Z_ZARRAY_INLINE_HPP
  26 
  27 #include "gc/z/zArray.hpp"
  28 #include "memory/allocation.inline.hpp"
  29 #include "runtime/atomic.hpp"
  30 
  31 template <typename T>
  32 inline ZArray<T>::ZArray() :
  33     _array(NULL),
  34     _size(0),
  35     _capacity(0) {}
  36 
  37 template <typename T>
  38 inline ZArray<T>::~ZArray() {
  39   FREE_C_HEAP_ARRAY(T, _array);
  40 }
  41 
  42 template <typename T>
  43 inline size_t ZArray<T>::size() const {
  44   return _size;
  45 }
  46 
  47 template <typename T>
  48 inline bool ZArray<T>::is_empty() const {
  49   return size() == 0;
  50 }
  51 
  52 template <typename T>
  53 inline T ZArray<T>::at(size_t index) const {
  54   assert(index < _size, "Index out of bounds");
  55   return _array[index];
  56 }
  57 
  58 template <typename T>
  59 inline void ZArray<T>::expand(size_t new_capacity) {
  60   T* new_array = NEW_C_HEAP_ARRAY(T, new_capacity, mtGC);
  61   if (_array != NULL) {
  62     memcpy(new_array, _array, sizeof(T) * _capacity);
  63     FREE_C_HEAP_ARRAY(T, _array);
  64   }
  65 
  66   _array = new_array;
  67   _capacity = new_capacity;
  68 }
  69 
  70 template <typename T>
  71 inline void ZArray<T>::add(T value) {
  72   if (_size == _capacity) {
  73     const size_t new_capacity = (_capacity > 0) ? _capacity * 2 : initial_capacity;
  74     expand(new_capacity);
  75   }
  76 
  77   _array[_size++] = value;
  78 }
  79 
  80 template <typename T>
  81 inline void ZArray<T>::transfer(ZArray<T>* from) {
  82   assert(_array == NULL, "Should be empty");
  83   _array = from->_array;
  84   _size = from->_size;
  85   _capacity = from->_capacity;
  86   from->_array = NULL;
  87   from->_size = 0;
  88   from->_capacity = 0;
  89 }
  90 
  91 template <typename T>
  92 inline void ZArray<T>::clear() {
  93   _size = 0;
  94 }
  95 
  96 template <typename T, bool parallel>
  97 inline ZArrayIteratorImpl<T, parallel>::ZArrayIteratorImpl(ZArray<T>* array) :
  98     _array(array),
  99     _next(0) {}
 100 
 101 template <typename T, bool parallel>
 102 inline bool ZArrayIteratorImpl<T, parallel>::next(T* elem) {
 103   if (parallel) {
 104     const size_t next = Atomic::add(&_next, 1u) - 1u;
 105     if (next < _array->size()) {
 106       *elem = _array->at(next);
 107       return true;
 108     }
 109   } else {
 110     if (_next < _array->size()) {
 111       *elem = _array->at(_next++);
 112       return true;
 113     }
 114   }
 115 
 116   // No more elements
 117   return false;
 118 }
 119 
 120 template <typename T>
 121 inline ZArrayIterator<T>::ZArrayIterator(ZArray<T>* array) :
 122     ZArrayIteratorImpl<T, ZARRAY_SERIAL>(array) {}
 123 
 124 template <typename T>
 125 inline ZArrayParallelIterator<T>::ZArrayParallelIterator(ZArray<T>* array) :
 126     ZArrayIteratorImpl<T, ZARRAY_PARALLEL>(array) {}
 127 
 128 #endif // SHARE_GC_Z_ZARRAY_INLINE_HPP