/*

 * Copyright (c) 2001, 2015, 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.

 *

 */

#include "utilities/stack.hpp"

class PSAdaptiveSizePolicy;

class PSYoungGen;

class PSOldGen;

class PSMarkSweep : public MarkSweep {

 private:

  static elapsedTimer        _accumulated_time;

  static jlong               _time_of_last_gc;   // ms

  static CollectorCounters*  _counters;

  // Closure accessors

  static OopClosure* mark_and_push_closure()   { return &MarkSweep::mark_and_push_closure; }

  static VoidClosure* follow_stack_closure()   { return &MarkSweep::follow_stack_closure; }

  static CLDClosure* follow_cld_closure()      { return &MarkSweep::follow_cld_closure; }

  static OopClosure* adjust_pointer_closure()  { return &MarkSweep::adjust_pointer_closure; }

  static CLDClosure* adjust_cld_closure()      { return &MarkSweep::adjust_cld_closure; }

  static BoolObjectClosure* is_alive_closure() { return &MarkSweep::is_alive; }

  // Mark live objects

  static void mark_sweep_phase1(bool clear_all_softrefs);

  // Calculate new addresses

  static void mark_sweep_phase2();

  // Update pointers

  static void mark_sweep_phase3();

  // Move objects to new positions

  static void mark_sweep_phase4();

  // Temporary data structures for traversal and storing/restoring marks

  static void allocate_stacks();

  static void deallocate_stacks();

  // If objects are left in eden after a collection, try to move the boundary

  // and absorb them into the old gen.  Returns true if eden was emptied.

  static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,

                                         PSYoungGen* young_gen,

                                         PSOldGen* old_gen);

  // Reset time since last full gc

  static void reset_millis_since_last_gc();

 public:

  static void invoke(bool clear_all_softrefs);

  static bool invoke_no_policy(bool clear_all_softrefs);

  static void initialize();

  // Public accessors

  static elapsedTimer* accumulated_time() { return &_accumulated_time; }

  static CollectorCounters* counters()    { return _counters; }

  // Time since last full gc (in milliseconds)

  static jlong millis_since_last_gc();

};