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Datei: EUC_TW_OLD.java 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_INSTANCEOOP_HPP
#define SHARE_OOPS_INSTANCEOOP_HPP

#include "oops/oop.hpp"
#include <type_traits>

// An instanceOop is an instance of a Java Class
// Evaluating "new HashTable()" will create an instanceOop.

class instanceOopDesc : public oopDesc {
public:
  // aligned header size.
  static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; }

  // If compressed, the offset of the fields of the instance may not be aligned.
  static int base_offset_in_bytes() {
    return (UseCompressedClassPointers) ?
            klass_gap_offset_in_bytes() :
            sizeof(instanceOopDesc);

  }
};

// See similar requirement for oopDesc.
static_assert(std::is_trivially_default_constructible<instanceOopDesc>::value, "required");

#endif // SHARE_OOPS_INSTANCEOOP_HPP

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