| /* |
| * Copyright (c) 2012, 2020, 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_METASPACE_METABASE_HPP |
| #define SHARE_MEMORY_METASPACE_METABASE_HPP |
| |
| #include "utilities/globalDefinitions.hpp" |
| |
| namespace metaspace { |
| |
| // Super class of Metablock and Metachunk to allow them to |
| // be put on the FreeList and in the BinaryTreeDictionary. |
| template <class T> |
| class Metabase { |
| size_t _word_size; |
| T* _next; |
| T* _prev; |
| |
| protected: |
| Metabase(size_t word_size) : _word_size(word_size), _next(NULL), _prev(NULL) {} |
| |
| public: |
| T* next() const { return _next; } |
| T* prev() const { return _prev; } |
| void set_next(T* v) { _next = v; assert(v != this, "Boom");} |
| void set_prev(T* v) { _prev = v; assert(v != this, "Boom");} |
| void clear_next() { set_next(NULL); } |
| void clear_prev() { set_prev(NULL); } |
| |
| size_t size() const { return _word_size; } |
| |
| void link_next(T* ptr) { set_next(ptr); } |
| void link_prev(T* ptr) { set_prev(ptr); } |
| void link_after(T* ptr) { |
| link_next(ptr); |
| if (ptr != NULL) ptr->link_prev((T*)this); |
| } |
| |
| uintptr_t* end() const { return ((uintptr_t*) this) + size(); } |
| |
| bool cantCoalesce() const { return false; } |
| |
| // Debug support |
| #ifdef ASSERT |
| void* prev_addr() const { return (void*)&_prev; } |
| void* next_addr() const { return (void*)&_next; } |
| void* size_addr() const { return (void*)&_word_size; } |
| #endif |
| bool verify_chunk_in_free_list(T* tc) const { return true; } |
| bool verify_par_locked() { return true; } |
| |
| void assert_is_mangled() const {/* Don't check "\*/} |
| |
| bool is_free() { return true; } |
| }; |
| |
| } // namespace metaspace |
| |
| #endif // SHARE_MEMORY_METASPACE_METABASE_HPP |