Class Data

include/process/mutex.hpp:73–91

private:
  struct Data
  {
    Data() : locked(false) {}

    ~Data()
    {
      // TODO(benh): Fail promises?
    }

    // Rather than use a process to serialize access to the mutex's
    // internal data we use a 'std::atomic_flag'.
    std::atomic_flag lock = ATOMIC_FLAG_INIT;

    // Describes the state of this mutex.
    bool locked;

    // Represents "waiters" for this lock.
    std::queue<Promise<Nothing>> waiters;
  };

  std::shared_ptr<Data> data;
};