klassOop.hpp

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/* Copyright 1994, 1995 LongView Technologies L.L.C. $Revision: 1.9 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
All rights reserved.

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// A klassOop is the C++ equivalent of a Delta class.
// Part of a klassOopDesc is a Klass which handle the 
// dispatching for the C++ method calls.

//  klassOop object layout:
//    [header     ]
//    [klass_field]
//      [vtbl                 ] <-- the Klass object starts here
//      [non_indexable_size   ]  
//      [has_untagged_contents]  can be avoided if prototype is stored.
//      [instvar              ]
//      [superKlass           ]
//      [methodDict           ]

class klassOopDesc : public memOopDesc {
 private:
  Klass _klass_part; 
 public:
  klassOop addr() const { return  (klassOop) memOopDesc::addr(); }
  Klass* klass_part() const { return &addr()->_klass_part; }

  bool is_invalid() const { return mark()->is_klass_invalid(); }

  void set_invalid(bool value) {
    set_mark(value ? mark()->set_klass_invalid() : mark()->clear_klass_invalid());
  }

  // sizing
  static int header_size() { return sizeof(klassOopDesc)/oopSize; }

  // debugging
  void print_superclasses();

  void bootstrap_object(bootstrap* st);
};

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