jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp@92ef81e2f571

8003557: NPG: Klass* const k should be const Klass* k.
Summary: With NPG, const KlassOop klass which is in fact a definition converted to Klass* const, which is not the original intention. The right usage is converting them to const Klass*.
Reviewed-by: coleenp, kvn
Contributed-by: yumin.qi@oracle.com

     1 /*

     2  * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP

    28 #include "gc_implementation/shared/mutableSpace.hpp"

    30 //

    31 // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations

    32 // to a MutableSpace.

    33 //

    35 class ObjectStartArray;

    37 class PSMarkSweepDecorator: public CHeapObj<mtGC> {

    38  private:

    39   static PSMarkSweepDecorator* _destination_decorator;

    41  protected:

    42   MutableSpace* _space;

    43   ObjectStartArray* _start_array;

    44   HeapWord* _first_dead;

    45   HeapWord* _end_of_live;

    46   HeapWord* _compaction_top;

    47   size_t _allowed_dead_ratio;

    49   bool insert_deadspace(size_t& allowed_deadspace_words, HeapWord* q,

    50                         size_t word_len);

    52  public:

    53   PSMarkSweepDecorator(MutableSpace* space, ObjectStartArray* start_array,

    54                        size_t allowed_dead_ratio) :

    55     _space(space), _start_array(start_array),

    56     _allowed_dead_ratio(allowed_dead_ratio) { }

    58   // During a compacting collection, we need to collapse objects into

    59   // spaces in a given order. We want to fill space A, space B, and so

    60   // on. The code that controls that order is in the following methods.

    61   static void set_destination_decorator_tenured();

    62   static void advance_destination_decorator();

    63   static PSMarkSweepDecorator* destination_decorator();

    65   // Accessors

    66   MutableSpace* space()                     { return _space; }

    67   ObjectStartArray* start_array()           { return _start_array; }

    69   HeapWord* compaction_top()                { return _compaction_top; }

    70   void set_compaction_top(HeapWord* value)  { _compaction_top = value; }

    72   size_t allowed_dead_ratio()               { return _allowed_dead_ratio; }

    73   void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; }

    75   // Work methods

    76   void adjust_pointers();

    77   void precompact();

    78   void compact(bool mangle_free_space);

    79 };

    81 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp@92ef81e2f571

src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp