author | pliden |
Mon, 18 Mar 2019 11:50:40 +0100 | |
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parent 53539 | 4ffdb0093c89 |
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/* |
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* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#ifndef SHARE_GC_Z_ZREFERENCEPROCESSOR_HPP |
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#define SHARE_GC_Z_ZREFERENCEPROCESSOR_HPP |
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#include "gc/shared/referenceDiscoverer.hpp" |
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#include "gc/z/zValue.hpp" |
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class ReferencePolicy; |
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class ZWorkers; |
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class ZReferenceProcessor : public ReferenceDiscoverer { |
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friend class ZReferenceProcessorTask; |
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private: |
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static const size_t reference_type_count = REF_PHANTOM + 1; |
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typedef size_t Counters[reference_type_count]; |
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ZWorkers* const _workers; |
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ReferencePolicy* _soft_reference_policy; |
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ZPerWorker<Counters> _encountered_count; |
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ZPerWorker<Counters> _discovered_count; |
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ZPerWorker<Counters> _enqueued_count; |
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ZPerWorker<oop> _discovered_list; |
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ZContended<oop> _pending_list; |
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oop* _pending_list_tail; |
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bool is_inactive(oop reference, oop referent, ReferenceType type) const; |
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bool is_strongly_live(oop referent) const; |
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bool is_softly_live(oop reference, ReferenceType type) const; |
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bool should_discover(oop reference, ReferenceType type) const; |
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bool should_drop(oop reference, ReferenceType type) const; |
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void keep_alive(oop reference, ReferenceType type) const; |
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void make_inactive(oop reference, ReferenceType type) const; |
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void discover(oop reference, ReferenceType type); |
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oop drop(oop reference, ReferenceType type); |
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oop* keep(oop reference, ReferenceType type); |
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bool is_empty() const; |
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void work(); |
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void collect_statistics(); |
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public: |
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ZReferenceProcessor(ZWorkers* workers); |
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void set_soft_reference_policy(bool clear); |
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void reset_statistics(); |
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virtual bool discover_reference(oop reference, ReferenceType type); |
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void process_references(); |
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void enqueue_references(); |
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}; |
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#endif // SHARE_GC_Z_ZREFERENCEPROCESSOR_HPP |