/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_VM_OOPS_TYPEARRAYOOP_HPP

#define SHARE_VM_OOPS_TYPEARRAYOOP_HPP

#include "oops/arrayOop.hpp"

#include "oops/typeArrayKlass.hpp"

#include "runtime/orderAccess.inline.hpp"

// A typeArrayOop is an array containing basic types (non oop elements).

// It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}

#include <limits.h>

class typeArrayOopDesc : public arrayOopDesc {

private:

  template <class T>

  static ptrdiff_t element_offset(BasicType bt, int index) {

    return arrayOopDesc::base_offset_in_bytes(bt) + sizeof(T) * index;

  }

 protected:

  friend class TypeArrayKlass;

 public:

  jbyte byte_at(int which) const;

  void byte_at_put(int which, jbyte contents);

  jboolean bool_at(int which) const;

  void bool_at_put(int which, jboolean contents);

  jchar char_at(int which) const;

  void char_at_put(int which, jchar contents);

  jint int_at(int which) const;

  void int_at_put(int which, jint contents);

  jshort short_at(int which) const;

  void short_at_put(int which, jshort contents);

  jushort ushort_at(int which) const;

  void ushort_at_put(int which, jushort contents);

  jlong long_at(int which) const;

  void long_at_put(int which, jlong contents);

  jfloat float_at(int which) const;

  void float_at_put(int which, jfloat contents);

  jdouble double_at(int which) const;

  void double_at_put(int which, jdouble contents);

  jbyte byte_at_acquire(int which) const;

  void release_byte_at_put(int which, jbyte contents);

  Symbol* symbol_at(int which) const;

  void symbol_at_put(int which, Symbol* contents);

  // Sizing

  // Returns the number of words necessary to hold an array of "len"

  // elements each of the given "byte_size".

 private:

  static int object_size(int lh, int length) {

    int instance_header_size = Klass::layout_helper_header_size(lh);

    int element_shift = Klass::layout_helper_log2_element_size(lh);

    DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));

    assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");

    julong size_in_bytes = (juint)length;

    size_in_bytes <<= element_shift;

    size_in_bytes += instance_header_size;

    julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);

    assert(size_in_words <= (julong)max_jint, "no overflow");

    return align_object_size((intptr_t)size_in_words);

  }

 public:

  inline int object_size();

};

#endif // SHARE_VM_OOPS_TYPEARRAYOOP_HPP