1 /*
   2  * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP
  24 #define SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP
  25 
  26 #include "memory/iterator.hpp"
  27 
  28 class ShenandoahHeap;
  29 class ShenandoahMarkingContext;
  30 class Thread;
  31 
  32 class ShenandoahForwardedIsAliveClosure: public BoolObjectClosure {
  33 private:
  34   ShenandoahMarkingContext* const _mark_context;
  35 public:
  36   inline ShenandoahForwardedIsAliveClosure();
  37   inline bool do_object_b(oop obj);
  38 };
  39 
  40 class ShenandoahIsAliveClosure: public BoolObjectClosure {
  41 private:
  42   ShenandoahMarkingContext* const _mark_context;
  43 public:
  44   inline ShenandoahIsAliveClosure();
  45   inline bool do_object_b(oop obj);
  46 };
  47 
  48 class ShenandoahIsAliveSelector : public StackObj {
  49 private:
  50   ShenandoahIsAliveClosure _alive_cl;
  51   ShenandoahForwardedIsAliveClosure _fwd_alive_cl;
  52 public:
  53   inline BoolObjectClosure* is_alive_closure();
  54 };
  55 
  56 class ShenandoahUpdateRefsClosure: public OopClosure {
  57 private:
  58   ShenandoahHeap* _heap;
  59 public:
  60   inline ShenandoahUpdateRefsClosure();
  61   inline void do_oop(oop* p);
  62   inline void do_oop(narrowOop* p);
  63 private:
  64   template <class T>
  65   inline void do_oop_work(T* p);
  66 };
  67 
  68 class ShenandoahEvacuateUpdateRootsClosure: public BasicOopIterateClosure {
  69 private:
  70   ShenandoahHeap* _heap;
  71   Thread* _thread;
  72 public:
  73   inline ShenandoahEvacuateUpdateRootsClosure();
  74   inline void do_oop(oop* p);
  75   inline void do_oop(narrowOop* p);
  76 
  77 private:
  78   template <class T>
  79   inline void do_oop_work(T* p);
  80 };
  81 
  82 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP