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59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
/*
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* Copyright Amazon.com Inc. 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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*/
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#ifndef SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHGENERATIONALHEURISTICS_HPP
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#define SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHGENERATIONALHEURISTICS_HPP
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#include "gc/shenandoah/heuristics/shenandoahAdaptiveHeuristics.hpp"
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class ShenandoahGeneration;
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/*
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* This class serves as the base class for heuristics used to trigger and
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* choose the collection sets for young and global collections. It leans
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* heavily on the existing functionality of ShenandoahAdaptiveHeuristics.
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*
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* It differs from the base class primarily in that choosing the collection
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* set is responsible for mixed collections and in-place promotions of tenured
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* regions.
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*/
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class ShenandoahGenerationalHeuristics : public ShenandoahAdaptiveHeuristics {
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public:
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explicit ShenandoahGenerationalHeuristics(ShenandoahGeneration* generation);
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size_t choose_collection_set(ShenandoahCollectionSet* collection_set) override;
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protected:
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ShenandoahGeneration* _generation;
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size_t add_preselected_regions_to_collection_set(ShenandoahCollectionSet* cset,
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const RegionData* data,
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size_t size) const;
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};
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#endif //SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHGENERATIONALHEURISTICS_HPP
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