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 * 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_ARRAYKLASS_HPP

#define SHARE_VM_OOPS_ARRAYKLASS_HPP

#include "memory/universe.hpp"

#include "oops/klass.hpp"

class fieldDescriptor;

class klassVtable;

// ArrayKlass is the abstract baseclass for all array classes

class ArrayKlass: public Klass {

  friend class VMStructs;

 private:

  // If you add a new field that points to any metaspace object, you

  // must add this field to ArrayKlass::metaspace_pointers_do().

  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).

 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

  DEBUG_ONLY(bool is_array_klass_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; }

  inline Klass* higher_dimension_acquire() const; // load with acquire semantics

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

  inline void release_set_higher_dimension(Klass* k); // store with release semantics

  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;}

  // 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()); }

  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);

  // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined

  Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;

  // Lookup operations

  Method* uncached_lookup_method(const Symbol* name,

                                 const Symbol* signature,

                                 OverpassLookupMode overpass_mode) const;

  static ArrayKlass* cast(Klass* k) {

    return const_cast<ArrayKlass*>(cast(const_cast<const Klass*>(k)));

  }

  static const ArrayKlass* cast(const Klass* k) {

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

    return static_cast<const ArrayKlass*>(k);

  }

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

  bool compute_is_subtype_of(Klass* k);

  // Sizing

  static int static_size(int header_size);

  virtual void metaspace_pointers_do(MetaspaceClosure* iter);

#if INCLUDE_SERVICES

  virtual void collect_statistics(KlassSizeStats *sz) const {

    Klass::collect_statistics(sz);

    // Do nothing for now, but remember to modify if you add new

    // stuff to ArrayKlass.

  }

#endif

  // Iterators

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

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

  // Return a handle.

  static void     complete_create_array_klass(ArrayKlass* k, Klass* super_klass, ModuleEntry* module, 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(ClassLoaderData* loader_data, Handle protection_domain, 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);

};

// Array oop iteration macros for declarations.

// Used to generate the declarations in the *ArrayKlass header files.

#define OOP_OOP_ITERATE_DECL_RANGE(OopClosureType, nv_suffix)                                   \

  void oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* closure, int start, int end);

#if INCLUDE_ALL_GCS

// Named NO_BACKWARDS because the definition used by *ArrayKlass isn't reversed, see below.

#define OOP_OOP_ITERATE_DECL_NO_BACKWARDS(OopClosureType, nv_suffix)            \

  void oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure);

#endif // INCLUDE_ALL_GCS

// Array oop iteration macros for definitions.

// Used to generate the definitions in the *ArrayKlass.inline.hpp files.

#define OOP_OOP_ITERATE_DEFN_RANGE(KlassType, OopClosureType, nv_suffix)                                  \

                                                                                                          \

void KlassType::oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* closure, int start, int end) {  \

  oop_oop_iterate_range<nvs_to_bool(nv_suffix)>(obj, closure, start, end);                                \

}

#if INCLUDE_ALL_GCS

#define OOP_OOP_ITERATE_DEFN_NO_BACKWARDS(KlassType, OopClosureType, nv_suffix)           \

void KlassType::oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure) {  \

  /* No reverse implementation ATM. */                                                    \

  oop_oop_iterate<nvs_to_bool(nv_suffix)>(obj, closure);                                  \

}

#else

#define OOP_OOP_ITERATE_DEFN_NO_BACKWARDS(KlassType, OopClosureType, nv_suffix)

#endif

#endif // SHARE_VM_OOPS_ARRAYKLASS_HPP