Java example source code file (parOopClosures.hpp)

This example Java source code file (parOopClosures.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

heapword, objtoscanqueueset, oopsinklassorgenclosure, paralleltaskterminator, parevacuatefollowersclosure, parnewgeneration, parrootscanwithbarriertwogensclosure, parrootscanwithoutbarrierclosure, parscanclosure, parscanthreadstate, parscanweakrefclosure, parscanwithbarrierclosure, parscanwithoutbarrierclosure, share_vm_gc_implementation_parnew_paroopclosures_hpp

The parOopClosures.hpp Java example source code

/*
 * Copyright (c) 2007, 2013, 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_PARNEW_PAROOPCLOSURES_HPP
#define SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP

#include "memory/genOopClosures.hpp"
#include "memory/padded.hpp"

// Closures for ParNewGeneration

class ParScanThreadState;
class ParNewGeneration;
typedef Padded<OopTaskQueue> ObjToScanQueue;
typedef GenericTaskQueueSet<ObjToScanQueue, mtGC> ObjToScanQueueSet;
class ParallelTaskTerminator;

class ParScanClosure: public OopsInKlassOrGenClosure {
 protected:
  ParScanThreadState* _par_scan_state;
  ParNewGeneration*   _g;
  HeapWord*           _boundary;
  template <class T> void inline par_do_barrier(T* p);
  template <class T> void inline do_oop_work(T* p,
                                             bool gc_barrier,
                                             bool root_scan);
 public:
  ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);
};

class ParScanWithBarrierClosure: public ParScanClosure {
 public:
  ParScanWithBarrierClosure(ParNewGeneration* g,
                            ParScanThreadState* par_scan_state) :
    ParScanClosure(g, par_scan_state) {}
  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);
  inline void do_oop_nv(oop* p);
  inline void do_oop_nv(narrowOop* p);
};

class ParScanWithoutBarrierClosure: public ParScanClosure {
 public:
  ParScanWithoutBarrierClosure(ParNewGeneration* g,
                               ParScanThreadState* par_scan_state) :
    ParScanClosure(g, par_scan_state) {}
  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);
  inline void do_oop_nv(oop* p);
  inline void do_oop_nv(narrowOop* p);
};

class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {
 public:
  ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,
                                       ParScanThreadState* par_scan_state) :
    ParScanClosure(g, par_scan_state) {}
  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);
};

class ParRootScanWithoutBarrierClosure: public ParScanClosure {
 public:
  ParRootScanWithoutBarrierClosure(ParNewGeneration* g,
                                   ParScanThreadState* par_scan_state) :
    ParScanClosure(g, par_scan_state) {}
  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);
};

class ParScanWeakRefClosure: public ScanWeakRefClosure {
 protected:
  ParScanThreadState* _par_scan_state;
  template <class T> inline void do_oop_work(T* p);
 public:
  ParScanWeakRefClosure(ParNewGeneration* g,
                        ParScanThreadState* par_scan_state);
  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);
  inline void do_oop_nv(oop* p);
  inline void do_oop_nv(narrowOop* p);
};

class ParEvacuateFollowersClosure: public VoidClosure {
 private:
  ParScanThreadState* _par_scan_state;
  ParScanThreadState* par_scan_state() { return _par_scan_state; }

  // We want to preserve the specific types here (rather than "OopClosure")
  // for later de-virtualization of do_oop calls.
  ParScanWithoutBarrierClosure* _to_space_closure;
  ParScanWithoutBarrierClosure* to_space_closure() {
    return _to_space_closure;
  }
  ParRootScanWithoutBarrierClosure* _to_space_root_closure;
  ParRootScanWithoutBarrierClosure* to_space_root_closure() {
    return _to_space_root_closure;
  }

  ParScanWithBarrierClosure* _old_gen_closure;
  ParScanWithBarrierClosure* old_gen_closure () {
    return _old_gen_closure;
  }
  ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;
  ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {
    return _old_gen_root_closure;
  }

  ParNewGeneration* _par_gen;
  ParNewGeneration* par_gen() { return _par_gen; }

  ObjToScanQueueSet*  _task_queues;
  ObjToScanQueueSet*  task_queues() { return _task_queues; }

  ParallelTaskTerminator* _terminator;
  ParallelTaskTerminator* terminator() { return _terminator; }
 public:
  ParEvacuateFollowersClosure(
    ParScanThreadState* par_scan_state_,
    ParScanWithoutBarrierClosure* to_space_closure_,
    ParScanWithBarrierClosure* old_gen_closure_,
    ParRootScanWithoutBarrierClosure* to_space_root_closure_,
    ParNewGeneration* par_gen_,
    ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,
    ObjToScanQueueSet* task_queues_,
    ParallelTaskTerminator* terminator_);
  virtual void do_void();
};

#endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP