jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parNew/parOopClosures.hpp@a61af66fc99e

     1 /*

     2  * Copyright (c) 2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 // Closures for ParNewGeneration

    27 class ParScanThreadState;

    28 class ParNewGeneration;

    29 template<class E> class GenericTaskQueueSet;

    30 typedef GenericTaskQueueSet<oop> ObjToScanQueueSet;

    31 class ParallelTaskTerminator;

    33 class ParScanClosure: public OopsInGenClosure {

    34 protected:

    35   ParScanThreadState* _par_scan_state;

    36   ParNewGeneration* _g;

    37   HeapWord* _boundary;

    38   void do_oop_work(oop* p,

    39                           bool gc_barrier,

    40                           bool root_scan);

    42   void par_do_barrier(oop* p);

    44 public:

    45   ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);

    46 };

    48 class ParScanWithBarrierClosure: public ParScanClosure {

    49 public:

    50   void do_oop(oop* p)    { do_oop_work(p, true, false); }

    51   void do_oop_nv(oop* p) { do_oop_work(p, true, false); }

    52   ParScanWithBarrierClosure(ParNewGeneration* g,

    53                             ParScanThreadState* par_scan_state) :

    54     ParScanClosure(g, par_scan_state) {}

    55 };

    57 class ParScanWithoutBarrierClosure: public ParScanClosure {

    58 public:

    59   ParScanWithoutBarrierClosure(ParNewGeneration* g,

    60                                ParScanThreadState* par_scan_state) :

    61     ParScanClosure(g, par_scan_state) {}

    62   void do_oop(oop* p)    { do_oop_work(p, false, false); }

    63   void do_oop_nv(oop* p) { do_oop_work(p, false, false); }

    64 };

    66 class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {

    67 public:

    68   ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,

    69                                        ParScanThreadState* par_scan_state) :

    70     ParScanClosure(g, par_scan_state) {}

    71   void do_oop(oop* p) { do_oop_work(p, true, true); }

    72 };

    74 class ParRootScanWithoutBarrierClosure: public ParScanClosure {

    75 public:

    76   ParRootScanWithoutBarrierClosure(ParNewGeneration* g,

    77                                    ParScanThreadState* par_scan_state) :

    78     ParScanClosure(g, par_scan_state) {}

    79   void do_oop(oop* p) { do_oop_work(p, false, true); }

    80 };

    82 class ParScanWeakRefClosure: public ScanWeakRefClosure {

    83 protected:

    84   ParScanThreadState* _par_scan_state;

    85 public:

    86   ParScanWeakRefClosure(ParNewGeneration* g,

    87                         ParScanThreadState* par_scan_state);

    88   void do_oop(oop* p);

    89   void do_oop_nv(oop* p);

    90 };

    92 class ParEvacuateFollowersClosure: public VoidClosure {

    93   ParScanThreadState* _par_scan_state;

    94   ParScanThreadState* par_scan_state() { return _par_scan_state; }

    96   // We want to preserve the specific types here (rather than "OopClosure")

    97   // for later de-virtualization of do_oop calls.

    98   ParScanWithoutBarrierClosure* _to_space_closure;

    99   ParScanWithoutBarrierClosure* to_space_closure() {

   100     return _to_space_closure;

   101   }

   102   ParRootScanWithoutBarrierClosure* _to_space_root_closure;

   103   ParRootScanWithoutBarrierClosure* to_space_root_closure() {

   104     return _to_space_root_closure;

   105   }

   107   ParScanWithBarrierClosure* _old_gen_closure;

   108   ParScanWithBarrierClosure* old_gen_closure () {

   109     return _old_gen_closure;

   110   }

   111   ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;

   112   ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {

   113     return _old_gen_root_closure;

   114   }

   116   ParNewGeneration* _par_gen;

   117   ParNewGeneration* par_gen() { return _par_gen; }

   119   ObjToScanQueueSet*  _task_queues;

   120   ObjToScanQueueSet*  task_queues() { return _task_queues; }

   122   ParallelTaskTerminator* _terminator;

   123   ParallelTaskTerminator* terminator() { return _terminator; }

   125 public:

   126   ParEvacuateFollowersClosure(

   127     ParScanThreadState* par_scan_state_,

   128     ParScanWithoutBarrierClosure* to_space_closure_,

   129     ParScanWithBarrierClosure* old_gen_closure_,

   130     ParRootScanWithoutBarrierClosure* to_space_root_closure_,

   131     ParNewGeneration* par_gen_,

   132     ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,

   133     ObjToScanQueueSet* task_queues_,

   134     ParallelTaskTerminator* terminator_);

   135   void do_void();

   136 };

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