/*

 * Copyright (c) 2001, 2007, 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.

 *

 */

class ReferenceProcessor;

// G1MarkSweep takes care of global mark-compact garbage collection for a

// G1CollectedHeap using a four-phase pointer forwarding algorithm.  All

// generations are assumed to support marking; those that can also support

// compaction.

//

// Class unloading will only occur when a full gc is invoked.

class G1MarkSweep : AllStatic {

  friend class VM_G1MarkSweep;

  friend class Scavenge;

 public:

  static void invoke_at_safepoint(ReferenceProcessor* rp,

                                  bool clear_all_softrefs);

 private:

  // Mark live objects

  static void mark_sweep_phase1(bool& marked_for_deopt,

                                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();

  static void allocate_stacks();

};