1 /*
   2  * Copyright (c) 2015, 2018, 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 #ifndef SHARE_VM_OOPS_VALUEARRAYOOP_HPP
  26 #define SHARE_VM_OOPS_VALUEARRAYOOP_HPP
  27 
  28 #include "oops/arrayOop.hpp"
  29 #include "oops/klass.hpp"
  30 #include "oops/oop.inline.hpp"
  31 
  32 // A valueArrayOop is an array containing value types (may include flatten embedded oop elements).
  33 
  34 class valueArrayOopDesc : public arrayOopDesc {
  35 
  36  public:
  37   void*  base() const;
  38   void* value_at_addr(int index, jint lh) const;
  39 
  40   // Return a buffered element from index
  41   static oop value_copy_from_index(valueArrayHandle vah, int index, TRAPS);
  42   void value_copy_from_index(int index, oop dst) const;
  43   void value_copy_to_index(oop src, int index) const;
  44 
  45   // Sizing
  46   static size_t element_size(int lh, int nof_elements) {
  47     return nof_elements << Klass::layout_helper_log2_element_size(lh);
  48   }
  49 
  50   static int object_size(int lh, int length) {
  51     julong size_in_bytes = header_size_in_bytes() + element_size(lh, length);
  52     julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);
  53     assert(size_in_words <= (julong)max_jint, "no overflow");
  54     return align_object_size((intptr_t)size_in_words);
  55   }
  56 
  57   int object_size() const;
  58 
  59 };
  60 
  61 #endif // SHARE_VM_OOPS_VALUEARRAYOOP_HPP