1 /*
   2  * Copyright (c) 2000, 2014, 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 
  25 #include "precompiled.hpp"
  26 #include "memory/resourceArea.hpp"
  27 #include "runtime/thread.inline.hpp"
  28 #include "utilities/array.hpp"
  29 
  30 
  31 template <MEMFLAGS F> void CHeapArray<F>::expand(size_t esize, int i, int& size) {
  32   // determine new size
  33   if (size == 0) size = 4; // prevent endless loop
  34   while (i >= size) size *= 2;
  35   // allocate and initialize new data section
  36   void* data = NEW_C_HEAP_ARRAY(char*, esize * size, F);
  37   memcpy(data, _data, esize * length());
  38   FREE_C_HEAP_ARRAY(char*, _data);
  39   _data = data;
  40 }
  41 
  42 template <MEMFLAGS F> void CHeapArray<F>::remove_at(size_t esize, int i) {
  43   assert(0 <= i && i < length(), "index out of bounds");
  44   _length--;
  45   void* dst = (char*)_data + i*esize;
  46   void* src = (char*)dst + esize;
  47   size_t cnt = (length() - i)*esize;
  48   memmove(dst, src, cnt);
  49 }