jdk8-mips64-public/hotspot: src/share/vm/memory/metadataFactory.hpp@710a3c8b516e

     1 /*

     2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_MEMORY_METADATAFACTORY_HPP

    26 #define SHARE_VM_MEMORY_METADATAFACTORY_HPP

    28 #include "utilities/array.hpp"

    29 #include "utilities/exceptions.hpp"

    30 #include "utilities/globalDefinitions.hpp"

    32 class MetadataFactory : AllStatic {

    33  public:

    34   template <typename T>

    35   static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) {

    36     // The "true" argument is because all metadata arrays are read only when

    37     // dumped to the shared archive

    38     return new (loader_data, length, /*read_only*/true, THREAD) Array<T>(length);

    39   }

    41   template <typename T>

    42   static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {

    43     Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL);

    44     for (int i = 0; i < length; i++) {

    45       array->at_put(i, value);

    46     }

    47     return array;

    48   }

    50   template <typename T>

    51   static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, TRAPS) {

    52     return new (loader_data, length, /*read_only*/false, THREAD) Array<T>(length);

    53   }

    55   template <typename T>

    56   static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {

    57     Array<T>* array = new_writeable_array<T>(loader_data, length, CHECK_NULL);

    58     for (int i = 0; i < length; i++) {

    59       array->at_put(i, value);

    60     }

    61     return array;

    62   }

    64   template <typename T>

    65   static void free_array(ClassLoaderData* loader_data, Array<T>* data) {

    66     if (data != NULL) {

    67       assert(loader_data != NULL, "shouldn't pass null");

    68       assert(!data->is_shared(), "cannot deallocate array in shared spaces");

    69       int size = data->size();

    70       if (DumpSharedSpaces) {

    71         loader_data->ro_metaspace()->deallocate((MetaWord*)data, size, false);

    72       } else {

    73         loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size, false);

    74       }

    75     }

    76   }

    78   // Deallocation method for metadata

    79   template <class T>

    80   static void free_metadata(ClassLoaderData* loader_data, T md) {

    81     if (md != NULL) {

    82       assert(loader_data != NULL, "shouldn't pass null");

    83       int size = md->size();

    84       // Call metadata's deallocate function which will call deallocate fields

    85       assert(!DumpSharedSpaces, "cannot deallocate metadata when dumping CDS archive");

    86       assert(!md->on_stack(), "can't deallocate things on stack");

    87       assert(!md->is_shared(), "cannot deallocate if in shared spaces");

    88       md->deallocate_contents(loader_data);

    89       loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size, md->is_klass());

    90     }

    91   }

    92 };

    94 #endif // SHARE_VM_MEMORY_METADATAFACTORY_HPP

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