LeoEcsSharedTime.cs

// startup.
sealed class BattleStartup : MonoBehaviour {
    EcsWorld _world;
    EcsSystems _systems;

    void Start () {
        _world = new EcsWorld ();
        _systems = new EcsSystems (_world);
        _systems
            .Add (new TimeSystem ())
            .Add (new TimeTestSystem ())
            .Inject (new TimeService ())
            .Init ();
    }

    void Update () {
        _systems?.Run ();
    }

    void OnDestroy () {
        if (_systems != null) {
            _systems.Destroy ();
            _systems = null;
            _world.Destroy ();
            _world = null;
        }
    }
}
// injected shared data.
sealed class TimeService {
    public float Time;
    public float DeltaTime;
    public float SmoothDeltaTime;
}
// time service to save engine time into shared state.
sealed class TimeSystem : IEcsRunSystem {
    // auto-injected fields.
    readonly TimeService _time = default;

    public void Run () {
        _time.Time = Time.time;
        _time.DeltaTime = Time.deltaTime;
        _time.SmoothDeltaTime = Time.smoothDeltaTime;
    }
}
// time-consuming system.
sealed class TimeTestSystem : IEcsRunSystem {
    // auto-injected fields.
    readonly TimeService _time = default;

    public void Run () {
        Debug.Log (_time.DeltaTime);
    }
}