/*
 * 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.
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#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