| /* |
| * Copyright (c) 2015, 2018, 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_GC_Z_ZREFERENCEPROCESSOR_HPP |
| #define SHARE_GC_Z_ZREFERENCEPROCESSOR_HPP |
| |
| #include "gc/shared/referenceDiscoverer.hpp" |
| #include "gc/z/zValue.hpp" |
| |
| class ReferencePolicy; |
| class ZWorkers; |
| |
| class ZReferenceProcessor : public ReferenceDiscoverer { |
| friend class ZReferenceProcessorTask; |
| |
| private: |
| static const size_t reference_type_count = REF_PHANTOM + 1; |
| typedef size_t Counters[reference_type_count]; |
| |
| ZWorkers* const _workers; |
| ReferencePolicy* _soft_reference_policy; |
| ZPerWorker<Counters> _encountered_count; |
| ZPerWorker<Counters> _discovered_count; |
| ZPerWorker<Counters> _enqueued_count; |
| ZPerWorker<oop> _discovered_list; |
| ZContended<oop> _pending_list; |
| oop* _pending_list_tail; |
| |
| void update_soft_reference_clock() const; |
| |
| ReferenceType reference_type(oop obj) const; |
| const char* reference_type_name(ReferenceType type) const; |
| volatile oop* reference_referent_addr(oop obj) const; |
| oop reference_referent(oop obj) const; |
| bool is_reference_inactive(oop obj) const; |
| bool is_referent_strongly_alive_or_null(oop obj, ReferenceType type) const; |
| bool is_referent_softly_alive(oop obj, ReferenceType type) const; |
| bool should_drop_reference(oop obj, ReferenceType type) const; |
| bool should_mark_referent(ReferenceType type) const; |
| bool should_clear_referent(ReferenceType type) const; |
| void keep_referent_alive(oop obj, ReferenceType type) const; |
| |
| void discover(oop obj, ReferenceType type); |
| oop drop(oop obj, ReferenceType type); |
| oop* keep(oop obj, ReferenceType type); |
| |
| bool is_empty() const; |
| |
| void work(); |
| void collect_statistics(); |
| |
| public: |
| ZReferenceProcessor(ZWorkers* workers); |
| |
| void set_soft_reference_policy(bool clear); |
| void reset_statistics(); |
| |
| virtual bool discover_reference(oop reference, ReferenceType type); |
| void process_references(); |
| void enqueue_references(); |
| }; |
| |
| #endif // SHARE_GC_Z_ZREFERENCEPROCESSOR_HPP |