using System;
using System.Collections.Generic;

namespace Global.Shared.OcTree
{
    public interface IPoolable
    {
        void Reset();
    }

    public class Pool<E> where E : IPoolable
    {
        private readonly Func<E> creator;
        private readonly List<E> pool = new List<E>();

        public Pool(Func<E> creator)
        {
            this.creator = creator;
        }

        public E Obtain()
        {
            if (pool.Count <= 0) return creator();

            var e = pool[0];
            pool.RemoveAt(0);
            return e;
        }

        public void Release(E e)
        {
            e.Reset();
            pool.Add(e);
        }
    }
}