unity单例模板

• unity 不继承Mono的单例模板
• 代码片段

public class BaseManager where T:BaseManager
{
    /// 

    /// 类型实例
    /// 
    private static T m_instance;

    /// 

    /// 双重锁，确保安全
    /// 
    private static readonly object lock_Obj = new object();
    public static T Instance 
    {
        get
        {
            lock (lock_Obj)
            {
                if (m_instance == null)
                {
                    lock (lock_Obj)
                    {
                        var ctors = typeof(T).GetConstructors(System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
                        var ctor = Array.Find(ctors, c => c.GetParameters().Length == 0);
                        if (ctor == null)
                        {
                            throw new Exception("Non_public ctor() not Found!!!");
                        }
                        m_instance = ctor.Invoke(null) as T;
                    }
                }
            }
            return m_instance;
        }
    }
    protect void T(){}
}