Quelle objArrayKlass.hpp Sprache: C

/*
* Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/

#ifndef SHARE_OOPS_OBJARRAYKLASS_HPP
#define SHARE_OOPS_OBJARRAYKLASS_HPP

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

class ClassLoaderData;

// ObjArrayKlass is the klass for objArrays

class ObjArrayKlass : public ArrayKlass {
  friend class VMStructs;
  friend class JVMCIVMStructs;

public:
  static const KlassKind Kind = ObjArrayKlassKind;

private:
  // If you add a new field that points to any metaspace object, you
  // must add this field to ObjArrayKlass::metaspace_pointers_do().
  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, Klass* element_klass, Symbol* name);
  static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, Klass* k, 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; }

  ModuleEntry* module() const;
  PackageEntry* package() const;

  // 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,
                                                  Array<InstanceKlass*>* transitive_interfaces);
  DEBUG_ONLY(bool is_objArray_klass_slow()  const  { return true; })
  size_t oop_size(oop obj) const;

  // Allocation
  static ObjArrayKlass* allocate_objArray_klass(ClassLoaderData* loader_data,
                                                int n, Klass* 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(); }

  virtual void metaspace_pointers_do(MetaspaceClosure* iter);

private:
  // Either oop or narrowOop depending on UseCompressedOops.
  // must be called from within ObjArrayKlass.cpp
  void do_copy(arrayOop s, size_t src_offset,
               arrayOop d, size_t dst_offset,
               int length, TRAPS);
public:
  // Returns the ObjArrayKlass for n'th dimension.
  virtual Klass* array_klass(int n, TRAPS);
  virtual Klass* array_klass_or_null(int n);

  // Returns the array class with this class as element type.
  virtual Klass* array_klass(TRAPS);
  virtual Klass* array_klass_or_null();

  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);

  // Oop fields (and metadata) iterators
  //
  // The ObjArrayKlass iterators also visits the Object's klass.

  // Iterate over oop elements and metadata.
  template <typename T, typename OopClosureType>
  inline void oop_oop_iterate(oop obj, OopClosureType* closure);

  // Iterate over oop elements and metadata.
  template <typename T, typename OopClosureType>
  inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure);

  // Iterate over oop elements within mr, and metadata.
  template <typename T, typename OopClosureType>
  inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);

  // Iterate over oop elements within [start, end), and metadata.
  template <typename T, class OopClosureType>
  inline void oop_oop_iterate_range(objArrayOop a, OopClosureType* closure, int start, int end);

public:
  // Iterate over all oop elements.
  template <typename T, class OopClosureType>
  inline void oop_oop_iterate_elements(objArrayOop a, OopClosureType* closure);

private:
  // Iterate over all oop elements with indices within mr.
  template <typename T, class OopClosureType>
  inline void oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, void* low, void* high);

  template <typename T, class OopClosureType>
  inline void oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, MemRegion mr);

public:
  jint compute_modifier_flags() 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_OOPS_OBJARRAYKLASS_HPP

quality100%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.