| /* |
| * Copyright (c) 2016, 2019, 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_JFR_RECORDER_STORAGE_JFRMEMORYSPACE_HPP |
| #define SHARE_JFR_RECORDER_STORAGE_JFRMEMORYSPACE_HPP |
| |
| #include "jfr/utilities/jfrAllocation.hpp" |
| #include "jfr/utilities/jfrDoublyLinkedList.hpp" |
| #include "jfr/utilities/jfrIterator.hpp" |
| |
| template <typename T, template <typename> class RetrievalType, typename Callback> |
| class JfrMemorySpace : public JfrCHeapObj { |
| public: |
| typedef T Type; |
| typedef RetrievalType<JfrMemorySpace<T, RetrievalType, Callback> > Retrieval; |
| typedef JfrDoublyLinkedList<Type> List; |
| typedef StopOnNullIterator<List> Iterator; |
| private: |
| List _free; |
| List _full; |
| size_t _min_elem_size; |
| size_t _limit_size; |
| size_t _cache_count; |
| Callback* _callback; |
| |
| bool should_populate_cache() const { return _free.count() < _cache_count; } |
| |
| public: |
| JfrMemorySpace(size_t min_elem_size, size_t limit_size, size_t cache_count, Callback* callback); |
| ~JfrMemorySpace(); |
| bool initialize(); |
| |
| size_t min_elem_size() const { return _min_elem_size; } |
| size_t limit_size() const { return _limit_size; } |
| |
| bool has_full() const { return _full.head() != NULL; } |
| bool has_free() const { return _free.head() != NULL; } |
| bool is_full_empty() const { return !has_full(); } |
| bool is_free_empty() const { return !has_free(); } |
| |
| size_t full_count() const { return _full.count(); } |
| size_t free_count() const { return _free.count(); } |
| |
| List& full() { return _full; } |
| const List& full() const { return _full; } |
| List& free() { return _free; } |
| const List& free() const { return _free; } |
| |
| Type* full_head() { return _full.head(); } |
| Type* full_tail() { return _full.tail(); } |
| Type* free_head() { return _free.head(); } |
| Type* free_tail() { return _free.tail(); } |
| |
| void insert_free_head(Type* t) { _free.prepend(t); } |
| void insert_free_tail(Type* t) { _free.append(t); } |
| void insert_free_tail(Type* t, Type* tail, size_t count) { _free.append_list(t, tail, count); } |
| void insert_full_head(Type* t) { _full.prepend(t); } |
| void insert_full_tail(Type* t) { _full.append(t); } |
| void insert_full_tail(Type* t, Type* tail, size_t count) { _full.append_list(t, tail, count); } |
| |
| Type* remove_free(Type* t) { return _free.remove(t); } |
| Type* remove_full(Type* t) { return _full.remove(t); } |
| Type* remove_free_tail() { _free.remove(_free.tail()); } |
| Type* remove_full_tail() { return _full.remove(_full.tail()); } |
| Type* clear_full(bool return_tail = false) { return _full.clear(return_tail); } |
| Type* clear_free(bool return_tail = false) { return _free.clear(return_tail); } |
| void release_full(Type* t); |
| void release_free(Type* t); |
| |
| void register_full(Type* t, Thread* thread) { _callback->register_full(t, thread); } |
| void lock() { _callback->lock(); } |
| void unlock() { _callback->unlock(); } |
| DEBUG_ONLY(bool is_locked() const { return _callback->is_locked(); }) |
| |
| Type* allocate(size_t size); |
| void deallocate(Type* t); |
| Type* get(size_t size, Thread* thread) { return Retrieval::get(size, this, thread); } |
| |
| template <typename IteratorCallback, typename IteratorType> |
| void iterate(IteratorCallback& callback, bool full = true, jfr_iter_direction direction = forward); |
| |
| bool in_full_list(const Type* t) const { return _full.in_list(t); } |
| bool in_free_list(const Type* t) const { return _free.in_list(t); } |
| }; |
| |
| #endif // SHARE_JFR_RECORDER_STORAGE_JFRMEMORYSPACE_HPP |