/*

 * Copyright (c) 2017, 2018, 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

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 */

#ifndef SHARE_GC_Z_ZMARKTERMINATE_HPP

#define SHARE_GC_Z_ZMARKTERMINATE_HPP

#include "gc/z/zGlobals.hpp"

#include "memory/allocation.hpp"

#include "utilities/globalDefinitions.hpp"

class ZMarkTerminate {

private:

  uint                         _nworkers;

  ZCACHE_ALIGNED volatile uint _nworking_stage0;

  volatile uint                _nworking_stage1;

  bool enter_stage(volatile uint* nworking_stage);

  void exit_stage(volatile uint* nworking_stage);

  bool try_exit_stage(volatile uint* nworking_stage);

public:

  ZMarkTerminate();

  void reset(uint nworkers);

  bool enter_stage0();

  void exit_stage0();

  bool try_exit_stage0();

  bool enter_stage1();

  bool try_exit_stage1();

};

#endif // SHARE_GC_Z_ZMARKTERMINATE_HPP