Quelle metadataFactory.hpp Sprache: C

/*
* Copyright (c) 2010, 2022, 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_MEMORY_METADATAFACTORY_HPP
#define SHARE_MEMORY_METADATAFACTORY_HPP

#include "classfile/classLoaderData.hpp"
#include "memory/classLoaderMetaspace.hpp"
#include "oops/array.inline.hpp"
#include "utilities/exceptions.hpp"
#include "utilities/globalDefinitions.hpp"
#include <type_traits>

class MetadataFactory : AllStatic {
public:
  template <typename T>
  static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) {
    // The "true" argument is because all metadata arrays are read only when
    // dumped to the shared archive
    return new (loader_data, length, THREAD) Array<T>(length);
  }

  template <typename T>
  static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
    Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL);
    for (int i = 0; i < length; i++) {
      array->at_put(i, value);
    }
    return array;
  }

  template <typename T>
  static void free_array(ClassLoaderData* loader_data, Array<T>* data) {
    if (data != NULL) {
      assert(loader_data != NULL, "shouldn't pass null");
      assert(!data->is_shared(), "cannot deallocate array in shared spaces");
      int size = data->size();
      loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size, false);
    }
  }

  // Deallocation method for metadata
  template <class T>
  static void free_metadata(ClassLoaderData* loader_data, T* md) {
    if (md != NULL) {
      assert(loader_data != NULL, "shouldn't pass null");
      int size = md->size();
      // Call metadata's deallocate function which will deallocate fields and release_C_heap_structures
      assert(!md->on_stack(), "can't deallocate things on stack");
      assert(!md->is_shared(), "cannot deallocate if in shared spaces");
      md->deallocate_contents(loader_data);
      bool is_klass = md->is_klass();
      // Call the destructor. This is currently used for MethodData which has a member
      // that needs to be destructed to release resources. Most Metadata derived classes have noop
      // destructors and/or cleanup using deallocate_contents.
      // T is a potentially const or volatile qualified pointer. Remove any const
      // or volatile so we can call the destructor of the type T points to.
      using U = std::remove_cv_t<T>;
      md->~U();
      loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size, is_klass);
    }
  }
};

#endif // SHARE_MEMORY_METADATAFACTORY_HPP

quality94%

¤ Dauer der Verarbeitung: 0.11 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.