using System;
using System.Collections.Generic;

/// <summary>
/// 普通单例
/// </summary>
/// <typeparam name="T"></typeparam>
public class Singleton<T> where T : Singleton<T>, new()
{
    /// <summary>
    /// 单例
    /// </summary>
    private static T m_Instance;

    /// <summary>
    /// 实例
    /// </summary>
    public static T Instance
    {
        get
        {
            if (object.ReferenceEquals(Singleton<T>.m_Instance, null))
            {
                var obj = new T();
                Singleton<T>.m_Instance = obj;
                Container.Add(typeof(T).Name, obj);
            }
            return Singleton<T>.m_Instance;
        }
    }

    /// <summary>
    /// 新能剖析方法,
    /// </summary>
    /// <returns>返回每个单例占用的内存大小</returns>
    [Obsolete("没有意义,需要不断的遍历引用直到基础类型才能确定最终大小,-wg 2019年10月23日 11:42:21")]
    public static Dictionary<string, int> Profile_Size()
    {
        var dic = new Dictionary<string, int>();
        //foreach (var itc in Container) {
        //    // itc.Key
        //    System.Runtime.InteropServices.Marshal.SizeOf( itc.Value)
        //}
        return dic;
    }

    #region '   内部容器  ' 
    static Dictionary<string, Object> _mC;
    static Dictionary<string, Object> Container
    {
        get
        {
            if (null == _mC)
            {
                _mC = new Dictionary<string, object>();
            }
            return _mC;
        }
    }
    #endregion
}