Implementing concurrent HashSet
Introduction:
The .NET Framework does not provide a built-in implementation of a concurrent HashSet
Custom thread safety implementation:
One approach is to create a custom thread-safe HashSet
public class ConcurrentHashSet<T> { private readonly HashSet<T> _hashSet = new HashSet<T>(); private readonly object _syncRoot = new object(); public bool Add(T item) { lock (_syncRoot) { return _hashSet.Add(item); } } public bool Remove(T item) { lock (_syncRoot) { return _hashSet.Remove(item); } } // 其他操作可以类似地实现 }
Use ConcurrentDictionary
Another approach is to utilize the ConcurrentDictionary
private ConcurrentDictionary<T, byte> _concurrentDictionary = new ConcurrentDictionary<T, byte>(); public bool Add(T item) { byte dummyValue = 0; return _concurrentDictionary.TryAdd(item, dummyValue); } public bool Remove(T item) { byte dummyValue; return _concurrentDictionary.TryRemove(item, out dummyValue); } // 其他操作可以类似地实现
Note:
When choosing a method, consider the following factors:
- Concurrency Safety: Both methods provide thread-safe access to the underlying data structures.
-
Performance: In some cases, a custom implementation may have better performance than ConcurrentDictionary
. -
Simplicity: ConcurrentDictionary
provides a simpler and more direct implementation.
Applicability of -
HashSet
: ConcurrentDictionarydoes not inherit from HashSet , so some HashSet -specific functionality may be lost.
Conclusion:
The need for concurrent HashSets
The above is the detailed content of How to Implement a Concurrent HashSet in the .NET Framework?. For more information, please follow other related articles on the PHP Chinese website!

This article explains the C Standard Template Library (STL), focusing on its core components: containers, iterators, algorithms, and functors. It details how these interact to enable generic programming, improving code efficiency and readability t

This article details efficient STL algorithm usage in C . It emphasizes data structure choice (vectors vs. lists), algorithm complexity analysis (e.g., std::sort vs. std::partial_sort), iterator usage, and parallel execution. Common pitfalls like

The article discusses dynamic dispatch in C , its performance costs, and optimization strategies. It highlights scenarios where dynamic dispatch impacts performance and compares it with static dispatch, emphasizing trade-offs between performance and

C 20 ranges enhance data manipulation with expressiveness, composability, and efficiency. They simplify complex transformations and integrate into existing codebases for better performance and maintainability.

The article discusses using move semantics in C to enhance performance by avoiding unnecessary copying. It covers implementing move constructors and assignment operators, using std::move, and identifies key scenarios and pitfalls for effective appl

This article details effective exception handling in C , covering try, catch, and throw mechanics. It emphasizes best practices like RAII, avoiding unnecessary catch blocks, and logging exceptions for robust code. The article also addresses perf

C memory management uses new, delete, and smart pointers. The article discusses manual vs. automated management and how smart pointers prevent memory leaks.

Article discusses effective use of rvalue references in C for move semantics, perfect forwarding, and resource management, highlighting best practices and performance improvements.(159 characters)


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
