本文介绍了什么是一个很好的线程安全单例通用模板模式在C#的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有以下C#单例模式,有什么办法可以改进吗?public class Singleton< T>其中T:class,new()
pre>
{
private static object _syncobj = new object();
private static volatile T _instance = null;
public static T Instance
{
get
{
if(_instance == null)
{
lock(_syncobj)
{
if(_instance == null)
{
_instance = new T();
}
}
}
return _instance;
}
}
public Singleton()
{}
}
首选使用示例:
class Foo:Singleton&Foo> ;
{
}
相关 p>
解决方案根据Jon Skeet在,您发布的代码实际上被视为坏代码,因为根据ECMA CLI标准进行检查时,它会显示为坏。 >
还要注意:每当你用一种新的T实例化你的对象,它变成另一个实例;它不会反映在您的原始单身人士中。
I have the following C# singleton pattern, is there any way of improving it?
public class Singleton<T> where T : class, new() { private static object _syncobj = new object(); private static volatile T _instance = null; public static T Instance { get { if (_instance == null) { lock (_syncobj) { if (_instance == null) { _instance = new T(); } } } return _instance; } } public Singleton() { } }
Preferred usage example:
class Foo : Singleton<Foo> { }
Related:
An obvious singleton implementation for .NET?
解决方案According to Jon Skeet in Implementing the Singleton Pattern in C# the code you posted is actually considered as bad code, because it appears broken when checked against the ECMA CLI standard.
Also watch out: everytime you instantiate your object with a new type of T, it becomes another instance; it doesn't get reflected in your original singleton.
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