doubleOop.hpp

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/* Copyright 1994, 1995 LongView Technologies L.L.C. $Revision: 1.11 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the 
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    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following 
          disclaimer in the documentation and/or other materials provided with the distribution.
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// Layout format:
//   [Header]
//   [Klass ]
//   [Double]   (contains untagged values)

class doubleOopDesc: public memOopDesc {
 private:
  // instance variables
  double _value;

  // conversion to untagged doubleOopDesc*
  doubleOopDesc* addr() const { return (doubleOopDesc*) memOopDesc::addr(); }

 public:
  // type conversion
  friend doubleOop as_doubleOop(void* p) { return doubleOop(as_memOop(p)); }

  // sizing
  static int header_size()  { return sizeof(doubleOopDesc)/oopSize; }
  static int object_size()  { return header_size(); }
  static int value_offset() { return sizeof(memOopDesc)/oopSize; }

  // value accessors
  double   value() const    { return addr()->_value; }
  void set_value(double v)  { addr()->_value = v;    }

  // bootstrapping
  void bootstrap_object(bootstrap* st);

  friend doubleKlass;
};

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