using System;

using System.Collections.Concurrent;

public class Program

{

    public class NotifyCache

    {

        private static readonly ObjectPool<NotifyCache> cache = new ObjectPool<NotifyCache>(() => new NotifyCache());

        private int x, y, z;

​

        private NotifyCache() { }

​

        public static Action<IAccelerometerListener> Create(int x, int y, int z)

        {

            var item = cache.Get();

            item.x = x;

            item.y = y;

            item.z = z;

            return item.Call;

        }

​

        private void Call(IAccelerometerListener listener)

        {

            listener.OnAccelerometersChanged(x, y, z);

            cache.Return(this);

        }

    }

    public static void Main()

    {

            Test.Notify(NotifyCache.Create(3, 5, 6));

            Test.Notify(NotifyCache.Create(13, 5, 16));

            Test.Notify(NotifyCache.Create(3, 25, 6));

            Test.Notify(NotifyCache.Create(3, 15, 6));

            Test.Notify(NotifyCache.Create(13, 5, 6));

    }

    public interface IAccelerometerListener

    {

        void OnAccelerometersChanged(int x, int y , int z);

    }

    private class Test : IAccelerometerListener

    {

        public void OnAccelerometersChanged(int x, int y, int z)

        {

            Console.WriteLine($"x :{x}, y: {y}, z {z}");

        }

        public static void Notify(Action<IAccelerometerListener> action)

        {

            action(new Test());

        }

    }

    public class ObjectPool<T>

    {

        private readonly ConcurrentBag<T> _objects;

        private readonly Func<T> _objectGenerator;

​

        public ObjectPool(Func<T> objectGenerator)

        {

            _objectGenerator = objectGenerator ?? throw new ArgumentNullException(nameof(objectGenerator));

            _objects = new ConcurrentBag<T>();

        }

​

        public T Get() => _objects.TryTake(out T item) ? item : _objectGenerator();

​

        public void Return(T item) => _objects.Add(item);

    }

}