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

 *

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 *

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 * 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_OBJARRAYKLASS_HPP

#define SHARE_VM_OOPS_OBJARRAYKLASS_HPP

#include "classfile/classLoaderData.hpp"

#include "oops/arrayKlass.hpp"

#include "utilities/macros.hpp"

// ObjArrayKlass is the klass for objArrays

class ObjArrayKlass : public ArrayKlass {

  friend class VMStructs;

  friend class JVMCIVMStructs;

 private:

  Klass* _element_klass;            // The klass of the elements of this array type

  Klass* _bottom_klass;             // The one-dimensional type (InstanceKlass or TypeArrayKlass)

  // Constructor

  ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name);

  static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS);

 public:

  // For dummy objects

  ObjArrayKlass() {}

  // Instance variables

  Klass* element_klass() const      { return _element_klass; }

  void set_element_klass(Klass* k)  { _element_klass = k; }

  Klass** element_klass_addr()      { return &_element_klass; }

  Klass* bottom_klass() const       { return _bottom_klass; }

  void set_bottom_klass(Klass* k)   { _bottom_klass = k; }

  Klass** bottom_klass_addr()       { return &_bottom_klass; }

  // Compiler/Interpreter offset

  static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); }

  // Dispatched operation

  bool can_be_primary_super_slow() const;

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

  bool compute_is_subtype_of(Klass* k);

  DEBUG_ONLY(bool is_objArray_klass_slow()  const  { return true; })

  int oop_size(oop obj) const;

  // Allocation

  static Klass* allocate_objArray_klass(ClassLoaderData* loader_data,

                                          int n, KlassHandle element_klass, TRAPS);

  objArrayOop allocate(int length, TRAPS);

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

  // Copying

  void  copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);

  // Compute protection domain

  oop protection_domain() const { return bottom_klass()->protection_domain(); }

 private:

  // Either oop or narrowOop depending on UseCompressedOops.

  // must be called from within ObjArrayKlass.cpp

  template <class T> void do_copy(arrayOop s, T* src, arrayOop d,

                                  T* dst, int length, TRAPS);

 protected:

  // Returns the ObjArrayKlass for n'th dimension.

  virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);

  // Returns the array class with this class as element type.

  virtual Klass* array_klass_impl(bool or_null, TRAPS);

 public:

  static ObjArrayKlass* cast(Klass* k) {

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

  }

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

    assert(k->is_objArray_klass(), "cast to ObjArrayKlass");

    return static_cast<const ObjArrayKlass*>(k);

  }

  // Sizing

  static int header_size()                { return sizeof(ObjArrayKlass)/wordSize; }

  int size() const                        { return ArrayKlass::static_size(header_size()); }

  // Initialization (virtual from Klass)

  void initialize(TRAPS);

  // GC specific object visitors

  //

  // Mark Sweep

  int  oop_ms_adjust_pointers(oop obj);

#if INCLUDE_ALL_GCS

  // Parallel Scavenge

  void oop_ps_push_contents(  oop obj, PSPromotionManager* pm);

  // Parallel Compact

  void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);

  void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);

#endif

  // Oop fields (and metadata) iterators

  //  [nv = true]  Use non-virtual calls to do_oop_nv.

  //  [nv = false] Use virtual calls to do_oop.

  //

  // The ObjArrayKlass iterators also visits the Object's klass.

 private:

  // Iterate over oop elements and metadata.

  template <bool nv, typename OopClosureType>

  inline void oop_oop_iterate(oop obj, OopClosureType* closure);

  // Iterate over oop elements within mr, and metadata.

  template <bool nv, typename OopClosureType>

  inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);

  // Iterate over oop elements with indices within [start, end), and metadata.

  template <bool nv, class OopClosureType>

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

  // Iterate over oop elements within [start, end), and metadata.

  // Specialized for [T = oop] or [T = narrowOop].

  template <bool nv, typename T, class OopClosureType>

  inline void oop_oop_iterate_range_specialized(objArrayOop a, OopClosureType* closure, int start, int end);

 public:

  // Iterate over all oop elements.

  template <bool nv, class OopClosureType>

  inline void oop_oop_iterate_elements(objArrayOop a, OopClosureType* closure);

 private:

  // Iterate over all oop elements.

  // Specialized for [T = oop] or [T = narrowOop].

  template <bool nv, typename T, class OopClosureType>

  inline void oop_oop_iterate_elements_specialized(objArrayOop a, OopClosureType* closure);

  // Iterate over all oop elements with indices within mr.

  template <bool nv, class OopClosureType>

  inline void oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, MemRegion mr);

  // Iterate over oop elements within [low, high)..

  // Specialized for [T = oop] or [T = narrowOop].

  template <bool nv, typename T, class OopClosureType>

  inline void oop_oop_iterate_elements_specialized_bounded(objArrayOop a, OopClosureType* closure, void* low, void* high);

 public:

  ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)

  ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)

  ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)

  ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)

#if INCLUDE_ALL_GCS

  ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)

  ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)

#endif // INCLUDE_ALL_GCS

  // JVM support

  jint compute_modifier_flags(TRAPS) const;

 public:

  // Printing

  void print_on(outputStream* st) const;

  void print_value_on(outputStream* st) const;

  void oop_print_value_on(oop obj, outputStream* st);

#ifndef PRODUCT

  void oop_print_on      (oop obj, outputStream* st);

#endif //PRODUCT

  const char* internal_name() const;

  // Verification

  void verify_on(outputStream* st);

  void oop_verify_on(oop obj, outputStream* st);

};

#endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP