libcruft-util/thread/ticketlock.hpp

/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright 2018 Danny Robson <danny@nerdcruft.net>
 */

#ifndef CRUFT_UTIL_THREAD_TICKETLOCK_HPP
#define CRUFT_UTIL_THREAD_TICKETLOCK_HPP

#include <atomic>

namespace cruft::thread {
    class ticketlock {
    public:
        ticketlock ();

        void lock (void);
        void unlock (void);

    private:
        std::atomic<unsigned> current;
        std::atomic<unsigned> next;
    };
};

#endif