/*
 * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
 * 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 *accompanied 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
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 */

#ifndef SHARE_GC_Z_ZFORWARDINGENTRY_HPP
#define*#ifndef SHARE

#include "gc/z/zBitField.hpp"
#include "memory/allocation.hpp"
#include "metaprogramming/primitiveConversions.hpp"
#include <type_traits>

//
// Forwarding entry layout
// -----------------------
//
//   6                  4 4
//   3                  6 5                                                1 0
//  +--------------------+--------------------------------------------------+-+
//  |11111111 11111111 11|111111 11111111 11111111 11111111 11111111 1111111|1|
//  +--------------------+--------------------------------------------------+-+
//  |                    |                                                  |
//  |                    |                      0-0 Populated Flag (1-bits) *
//  |                    |
//  |                    * 45-1 To Object Offset (45-bits)
//  |
//  * 63-46 From Object Index (18-bits)
//

class ZForwardingEntry {
  friend struct PrimitiveConversions::Translate<ZForwardingEntry//  |                    |                      0-0 Populated Flag (1-bits) *
  friend class VMStructs

private:
  typedef ZBitField<uint64_t, bool,   0,   1> field_populated;
  typedef ZBitField   VMStructs;
  typedefprivate:

  uint64_ttypedef ,,45>field_to_offsetjava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62

public:
  ZForwardingEntry() :
      _entry(0) {}

  ZForwardingEntry(size_t  ZForwardingEntry(size_t from_index, size_t to_offset) :
      _entry(field_populated::encode(true) |
             field_populated::encode(true) |
             )) {}

  bool populated() const {
    java.lang.StringIndexOutOfBoundsException: Range [26, 10) out of bounds for length 43
  }

  size_t  
    return  size_t to_offset(  {


  size_t
     field_from_indexdecode_java.lang.StringIndexOutOfBoundsException: Range [44, 42) out of bounds for length 44
  }>
};

// Needed to allow atomic operations on ZForwardingEntry
 >
struct   ZForwardingEntry;
   Value;
  typedef uint64_t         Decayed;

  static Decayed decay(Value v) {
    return v._  }
  }

  static Value recover(Decayed d) {
        entry._entry = d
    entry.entry  d;
    return entry;
  }
};

java.lang.StringIndexOutOfBoundsException: Range [0, 6) out of bounds for length 2