Paulhas a good implementation except that we shouldn't use the same object/class to synchronize over. We should have a private monitor that does that. 22nd May 2019, 1:11 AM Chriptus13 + 1 By pure curiosityChriptus13, why wouldn't you use the same object for synchronization ?
Looking at all the three ways to achieve thread-safety, I think the third one is the best option. In that case, the modified class will look like this: The local variableresultseems unnecessary. But, it’s there to improve the performance of our code. In cases where the instance is alr...
In .NET, System.Array is a full-blown class with rank, length, and lower bound, as well as data. To pass the length to C++, you simply pass Array.Length as a separate parameter.But what about going the other way? That is, from unmanaged to managed code. In parti...
import java.util.*; class Singleton { private static Singleton instance; private Vector v; private boolean inUse; private Singleton() { v = new Vector(); v.addElement(new Object()); inUse = true; } public static Singleton getInstance() { if (instance == null) //1 instance = new Si...
using System;using System.Threading;namespace Singleton{ // This Singleton implementation is called "double check lock". It is safe // in multithreaded environment and provides lazy initialization for the // Singleton object. class Singleton { private Singleton() { } private static Singleton _insta...
class Singleton { private Singleton() { } public static readonly Singleton Instance = new Singleton(); } 但项目中我们往往需要更粗或者更细颗粒度的Singleton,比如某个线程是长时间运行的后台任务,它本身存在很多模块和中间处理,但每个线程都希望有自己的线程内单独Singleton对象,其他线程也独立操作自己的线程内...
In Java: Aa=A.getInstance();Ab=A.getInstance(); a should equal to b. Challenge If we call getInstance concurrently, can you make sure your code could run correctly? classSolution {/***@return: The same instance of this class every time ...
使用python实现设计模式中的单例模式。单例模式是一种比较常用的设计模式，其实现和使用场景判定都是相对...
The general form of a singleton in C++ can therefore be given as follows (Alexandrescu, 2001): class Singleton { public: static Singleton &GetInstance(); private: Singleton(); ~Singleton(); Singleton(const Singleton &); const Singleton &operator =(const Singleton &); }; Then user code can...
单例设计模式(Singleton Class) 看看例子,并阅读代码行的注释更清楚。这是java代码,你可以使用C ++和.net编程使用相同的过程。 public class SingletonDemo { //Make the constructor private, so no other call can create object of //this class directly using new operator. ...