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

 *

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

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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_ARRAYKLASS_HPP

#define SHARE_VM_OOPS_ARRAYKLASS_HPP

#include "memory/universe.hpp"

#include "oops/klass.hpp"

class klassVtable;

// ArrayKlass is the abstract baseclass for all array classes

class ArrayKlass: public Klass {

  friend class VMStructs;

 private:

  int      _dimension;         // This is n'th-dimensional array.

  Klass* volatile _higher_dimension;  // Refers the (n+1)'th-dimensional array (if present).

  Klass* volatile _lower_dimension;   // Refers the (n-1)'th-dimensional array (if present).

  int      _vtable_len;        // size of vtable for this klass

  juint    _alloc_size;        // allocation profiling support

  oop      _component_mirror;  // component type, as a java/lang/Class

 protected:

  // Constructors

  // The constructor with the Symbol argument does the real array

  // initialization, the other is a dummy

  ArrayKlass(Symbol* name);

  ArrayKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for cds"); }

 public:

  // Testing operation

  bool oop_is_array_slow() const { return true; }

  // Instance variables

  int dimension() const                 { return _dimension;      }

  void set_dimension(int dimension)     { _dimension = dimension; }

  Klass* higher_dimension() const     { return _higher_dimension; }

  void set_higher_dimension(Klass* k) { _higher_dimension = k; }

  Klass** adr_higher_dimension()      { return (Klass**)&this->_higher_dimension;}

  Klass* lower_dimension() const      { return _lower_dimension; }

  void set_lower_dimension(Klass* k)  { _lower_dimension = k; }

  Klass** adr_lower_dimension()       { return (Klass**)&this->_lower_dimension;}

  // Allocation profiling support

  juint alloc_size() const              { return _alloc_size; }

  void set_alloc_size(juint n)          { _alloc_size = n; }

  // offset of first element, including any padding for the sake of alignment

  int  array_header_in_bytes() const    { return layout_helper_header_size(layout_helper()); }

  int  log2_element_size() const        { return layout_helper_log2_element_size(layout_helper()); }

  // type of elements (T_OBJECT for both oop arrays and array-arrays)

  BasicType element_type() const        { return layout_helper_element_type(layout_helper()); }

  oop  component_mirror() const         { return _component_mirror; }

  void set_component_mirror(oop m)      { klass_oop_store(&_component_mirror, m); }

  oop* adr_component_mirror()           { return (oop*)&this->_component_mirror;}

  // Compiler/Interpreter offset

  static ByteSize component_mirror_offset() { return in_ByteSize(offset_of(ArrayKlass, _component_mirror)); }

  virtual Klass* java_super() const;//{ return SystemDictionary::Object_klass(); }

  // Allocation

  // Sizes points to the first dimension of the array, subsequent dimensions

  // are always in higher memory.  The callers of these set that up.

  virtual oop multi_allocate(int rank, jint* sizes, TRAPS);

  objArrayOop allocate_arrayArray(int n, int length, TRAPS);

  // Lookup operations

  Method* uncached_lookup_method(Symbol* name, Symbol* signature) const;

  // Casting from Klass*

  static ArrayKlass* cast(Klass* k) {

    assert(k->oop_is_array(), "cast to ArrayKlass");

    return (ArrayKlass*) k;

  }

  GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);

  bool compute_is_subtype_of(Klass* k);

  // Sizing

  static int header_size()                 { return sizeof(ArrayKlass)/HeapWordSize; }

  static int static_size(int header_size);

  // Java vtable

  klassVtable* vtable() const;             // return new klassVtable

  int  vtable_length() const               { return _vtable_len; }

  static int base_vtable_length()          { return Universe::base_vtable_size(); }

  void set_vtable_length(int len)          { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; }

 protected:

  inline intptr_t* start_of_vtable() const;

 public:

  // Iterators

  void array_klasses_do(void f(Klass* k));

  void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);

  void with_array_klasses_do(void f(Klass* k));

  // GC support

  virtual void oops_do(OopClosure* cl);

  // Return a handle.

  static void     complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS);

  // jvm support

  jint compute_modifier_flags(TRAPS) const;

  // JVMTI support

  jint jvmti_class_status() const;

  // CDS support - remove and restore oops from metadata. Oops are not shared.

  virtual void remove_unshareable_info();

  virtual void restore_unshareable_info(TRAPS);

  // Printing

  void print_on(outputStream* st) const;

  void print_value_on(outputStream* st) const;

  void oop_print_on(oop obj, outputStream* st);

  // Verification

  void verify_on(outputStream* st);

  void oop_verify_on(oop obj, outputStream* st);

};

#endif // SHARE_VM_OOPS_ARRAYKLASS_HPP