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_SHENANDOAHPASSIVEHEURISTICS_HPP
  25 #define SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHPASSIVEHEURISTICS_HPP
  26 
  27 #include "gc_implementation/shenandoah/heuristics/shenandoahHeuristics.hpp"
  28 
  29 class ShenandoahPassiveHeuristics : public ShenandoahHeuristics {
  30 public:
  31    virtual bool should_start_gc() const;
  32 
  33   virtual bool should_process_references();
  34 
  35   virtual bool should_unload_classes();
  36 
  37   virtual bool should_degenerate_cycle();
  38 
  39   virtual void choose_collection_set_from_regiondata(ShenandoahCollectionSet* set,
  40                                                      RegionData* data, size_t data_size,
  41                                                      size_t free);
  42 
  43   virtual const char* name()     { return "Passive"; }
  44   virtual bool is_diagnostic()   { return true; }
  45   virtual bool is_experimental() { return false; }
  46 };
  47 
  48 #endif // SHARE_VM_GC_SHENANDOAH_HEURISTICS_SHENANDOAHPASSIVEHEURISTICS_HPP