| /* |
| * Copyright (c) 2001, 2012, 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_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP |
| #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP |
| |
| #include "gc_implementation/shared/mutableSpace.hpp" |
| |
| // |
| // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations |
| // to a MutableSpace. |
| // |
| |
| class ObjectStartArray; |
| |
| class PSMarkSweepDecorator: public CHeapObj<mtGC> { |
| private: |
| static PSMarkSweepDecorator* _destination_decorator; |
| |
| protected: |
| MutableSpace* _space; |
| ObjectStartArray* _start_array; |
| HeapWord* _first_dead; |
| HeapWord* _end_of_live; |
| HeapWord* _compaction_top; |
| size_t _allowed_dead_ratio; |
| |
| bool insert_deadspace(size_t& allowed_deadspace_words, HeapWord* q, |
| size_t word_len); |
| |
| public: |
| PSMarkSweepDecorator(MutableSpace* space, ObjectStartArray* start_array, |
| size_t allowed_dead_ratio) : |
| _space(space), _start_array(start_array), |
| _allowed_dead_ratio(allowed_dead_ratio) { } |
| |
| // During a compacting collection, we need to collapse objects into |
| // spaces in a given order. We want to fill space A, space B, and so |
| // on. The code that controls that order is in the following methods. |
| static void set_destination_decorator_tenured(); |
| static void advance_destination_decorator(); |
| static PSMarkSweepDecorator* destination_decorator(); |
| |
| // Accessors |
| MutableSpace* space() { return _space; } |
| ObjectStartArray* start_array() { return _start_array; } |
| |
| HeapWord* compaction_top() { return _compaction_top; } |
| void set_compaction_top(HeapWord* value) { _compaction_top = value; } |
| |
| size_t allowed_dead_ratio() { return _allowed_dead_ratio; } |
| void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; } |
| |
| // Work methods |
| void adjust_pointers(); |
| void precompact(); |
| void compact(bool mangle_free_space); |
| }; |
| |
| #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP |