/*
 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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#ifndef SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
#define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP

#include "oops/instanceKlass.hpp"
#include "utilities/macros.hpp"

// An InstanceClassLoaderKlass is a specialization of the InstanceKlass. It does
// not add any field.  It is added to walk the dependencies for the class loader
// key that this class loader points to.  This is how the loader_data graph is
// walked and dependant class loaders are kept alive.  I thought we walked
// the list later?

class InstanceClassLoaderKlass: public InstanceKlass {
  friend class VMStructs;
  friend class InstanceKlass;

  // Constructor
  InstanceClassLoaderKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous);

public:
  virtual bool oop_is_instanceClassLoader() const { return true; }

  InstanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }

  static InstanceClassLoaderKlass* cast(Klass* k) {
    assert(k->is_klass(), "must be");
    assert(k->oop_is_instanceClassLoader(), "cast to instanceClassLoaderKlass");
    return (InstanceClassLoaderKlass*) k;
  }

  template <bool nv, typename OopClosureType>
  int oop_oop_iterate(oop obj, OopClosureType* blk);
 
  template <bool nv, typename OopClosureType>
  int oop_oop_iterate_m(oop obj, OopClosureType* blk, MemRegion mr);
 
#if INCLUDE_ALL_GCS
  template <bool nv, typename OopClosureType>
  int oop_oop_iterate_backwards(oop obj, OopClosureType* blk);
#endif // INCLUDE_ALL_GCS

    // Garbage collection
  void oop_follow_contents(oop obj);

  // Parallel Scavenge and Parallel Old
  PARALLEL_GC_DECLS
};

#endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP