/*

 * Copyright (c) 2011, 2016, 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.

 *

 */

#include "classfile/classLoaderData.hpp"

#include "classfile/javaClasses.hpp"

#include "oops/oop.inline.hpp"

unsigned int ClassLoaderData::identity_hash() const {

  return _class_loader == NULL ? 0 : _class_loader->identity_hash();

}

inline ClassLoaderData* ClassLoaderData::class_loader_data_or_null(oop loader) {

  if (loader == NULL) {

    return ClassLoaderData::the_null_class_loader_data();

  }

  return java_lang_ClassLoader::loader_data(loader);

}

inline ClassLoaderData* ClassLoaderData::class_loader_data(oop loader) {

  ClassLoaderData* loader_data = class_loader_data_or_null(loader);

  assert(loader_data != NULL, "Must be");

  return loader_data;

}

inline ClassLoaderData *ClassLoaderDataGraph::find_or_create(Handle loader, TRAPS) {

  guarantee(loader() != NULL && loader()->is_oop(), "Loader must be oop");

  // Gets the class loader data out of the java/lang/ClassLoader object, if non-null

  // it's already in the loader_data, so no need to add

  ClassLoaderData* loader_data= java_lang_ClassLoader::loader_data(loader());

  if (loader_data) {

     return loader_data;

  }

  return ClassLoaderDataGraph::add(loader, false, THREAD);

}