August 2021
Intermediate to advanced
450 pages
6h 57m
Chinese
Content preview from C++程序设计语言（第4部分：标准库）（原书第4版）Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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42.1 引言
并发，即多个任务同时执行，广泛用于提高吞吐率（使用多个处理器完成单个运算）或提高响应能力（当程序的一部分等待响应时允许另一部分继续执行）。
我们在5.3节中已经介绍了C++标准对并发的支持，当然只是一种导览的形式，本章和前一章提供更加细致、更加系统化的介绍。
如果一项活动可能与其他活动并发执行，我们就称之为任务（task）。线程（thread）是执行任务的计算机特性的系统层面表示。一个thread可执行一个任务。一个thread可能与其他thread共享地址空间。即，在单一地址空间中的所有thread能访问相同的内存位置。并发系统程序员所面临的重要挑战之一，就是确保多thread并发访问内存的方式是合理的。
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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.