/*

 * Copyright (c) 2019, 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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 * questions.

 *

 */

#ifndef OS_LINUX_WAITBARRIER_LINUX_HPP

#define OS_LINUX_WAITBARRIER_LINUX_HPP

#include "memory/allocation.hpp"

class LinuxWaitBarrier : public CHeapObj<mtInternal> {

  volatile int _futex_barrier;

  // Prevent copying and assignment of LinuxWaitBarrier instances.

  LinuxWaitBarrier(const LinuxWaitBarrier&);

  LinuxWaitBarrier& operator=(const LinuxWaitBarrier&);

 public:

  LinuxWaitBarrier() : _futex_barrier(0) {};

  ~LinuxWaitBarrier() {};

  const char* description() { return "futex"; }

  void arm(int barrier_tag);

  void disarm();

  void wait(int barrier_tag);

};

#endif // OS_LINUX_WAITBARRIER_LINUX_HPP