38 lines
1.0 KiB
C#
38 lines
1.0 KiB
C#
using System;
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using System.Reflection;
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using UnityEngine;
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public abstract class BaseManager<T> where T : class
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{
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// 使用 volatile 关键字确保在多线程环境下 instance 字段的可见性和有序性
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// 防止双重检查锁定模式中的内存重排序问题
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private static volatile T instance;
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protected static readonly object lockObj = new object();
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public static T Instance
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{
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get
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{
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// 第一次检查：如果 instance 不为 null，直接返回，避免不必要的锁操作
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if (instance == null)
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{
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lock (lockObj)
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{
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// 第二次检查：在锁内再次检查，确保只有一个线程创建实例
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if (instance == null)
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{
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instance = (T)Activator.CreateInstance(typeof(T), true);
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}
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}
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}
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return instance;
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}
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}
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public virtual void Destroy()
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{
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instance = null;
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}
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} |