November 2020
Intermediate to advanced
226 pages
5h 34m
Chinese
Content preview from C#并发编程经典实例（第2版）
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集合
｜
105
线程安全集合
这些可变的集合实例可以由多个线程同时更改。线程安全集合混用了细粒度锁和无锁技
术来确保线程阻塞时间最短（通常根本不会阻塞）。对于许多线程安全集合，集合枚举
创建集合的快照，然后枚举该快照。另外，线程安全集合可以从多个线程安全地访问，
这也是它的主要优点。操作只会在短时间内阻塞代码，前提是存在阻塞。
生产者集合与消费者集合
设计这些可变集合实例旨在让生产者（可能有多个）向集合中推入项，同时让消费者
（也可能有多个）从集合中提取项。因此，它们充当生产者代码和消费者代码之间的桥
梁，并且可以选择限制集合中的项的数量。生产者集合（或消费者集合）可以有一个阻
塞
API
或异步
API
，例如，当集合为空时，受阻塞的生产者集合（或消费者集合）将阻
塞调用它们的消费者线程，直到添加另一项为止。但是，异步生产者集合（或消费者集
合）可以让调用它们的消费者线程异步等待，直至添加另一项。
本章的各节使用了不同的生产者集合（或消费者集合），它们具有不同的优点。表
9-1
整理
了一些集合，我们可以根据具体情况进行选择。
表9-1：生产者集合与消费者集合
特性 通道
BlockingCollection<T> BufferBlock<T>
AsyncProducer-
ConsumerQueue<T>
AsyncCollection<T>
队列语义
✓ ✓ ✓ ✓ ✓
栈
/
背包
语义
✗ ✓ ✗ ✗ ✓
同步
API
✓ ✓ ✓ ✓ ✓
异步
API
✓ ✗ ✓ ✓ ✓
当满载时，
丢弃项
✓ ✗ ✗ ✗ ✗
经过微软
测试
✓ ✓
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.