src/hotspot/cpu/aarch64/spin_wait_aarch64.hpp

/*
 * Copyright Amazon.com Inc. 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 CPU_AARCH64_SPIN_WAIT_AARCH64_HPP
#define CPU_AARCH64_SPIN_WAIT_AARCH64_HPP

class SpinWait {
public:
  enum Inst {
    NONE = -1,
    NOP,
    ISB,
    YIELD
  };

private:
  Inst _inst;
  int _count;

public:
  SpinWait(Inst inst = NONE, int count = 0) : _inst(inst), _count(count) {}

  Inst inst() const { return _inst; }
  int inst_count() const { return _count; }
};

#endif // CPU_AARCH64_SPIN_WAIT_AARCH64_HPP