using System;
namespace XRTool.Util
{
    /// <summary>
    /// 基本的单例，不依附Unity
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public abstract class Singleton<T> where T :class, new()
    {
        private static T instance;
        private static readonly object syslock = new object();
        public static T Instance
        {
            get
            {
                //线程安全锁
                if (instance == null)
                {
                    lock (syslock)
                    {
                        if (instance == null)
                        {
                            instance = new T();
                        }
                    }
                }
                return instance;
            }
        }
    }
}