1 /*
   2  * Copyright (c) 2018, 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 
  24 #ifndef SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHTRAVERSALHEURISTICS_HPP
  25 #define SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHTRAVERSALHEURISTICS_HPP
  26 
  27 #include "gc/shenandoah/shenandoahHeuristics.hpp"
  28 
  29 class ShenandoahTraversalHeuristics : public ShenandoahHeuristics {
  30 private:
  31   uint64_t _last_cset_select;
  32 
  33 protected:
  34   virtual void choose_collection_set_from_regiondata(ShenandoahCollectionSet* set,
  35                                                      RegionData* data, size_t data_size,
  36                                                      size_t free);
  37 
  38 public:
  39   ShenandoahTraversalHeuristics();
  40 
  41   virtual bool should_start_normal_gc() const;
  42 
  43   virtual bool is_experimental();
  44 
  45   virtual bool is_diagnostic();
  46 
  47   virtual bool can_do_traversal_gc();
  48 
  49   virtual const char* name();
  50 
  51   virtual void choose_collection_set(ShenandoahCollectionSet* collection_set);
  52 
  53   virtual bool should_start_traversal_gc();
  54 };
  55 
  56 #endif // SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHTRAVERSALHEURISTICS_HPP