Class Data

include/process/future.hpp:531–556

  };

  struct Data
  {
    Data();
    ~Data() = default;

    void clearAllCallbacks();

    std::atomic_flag lock = ATOMIC_FLAG_INIT;
    State state;
    bool discard;
    bool associated;
    bool abandoned;

    // One of:
    //   1. None, the state is PENDING or DISCARDED.
    //   2. Some, the state is READY.
    //   3. Error, the state is FAILED; 'error()' stores the message.
    Result<T> result;

    std::vector<AbandonedCallback> onAbandonedCallbacks;
    std::vector<DiscardCallback> onDiscardCallbacks;
    std::vector<ReadyCallback> onReadyCallbacks;
    std::vector<FailedCallback> onFailedCallbacks;
    std::vector<DiscardedCallback> onDiscardedCallbacks;
    std::vector<AnyCallback> onAnyCallbacks;
  };

  // Abandons this future. Returns false if the future is already
  // associated or no longer pending. Otherwise returns true and any