嵌入式软件异步编程：应用案例

ゝ一世哀愁。 2022-09-29 01:49 202阅读 0赞

异步编程有很多成功的应用，例如lwIP、Nginx、Node.js、Linux AIO、JavaScript等。可以将这些成功案例的设计经验引入到嵌入式软件。

[http://blog.csdn.net/zoomdy/article/details/61916610][http_blog.csdn.net_zoomdy_article_details_61916610]  
mingdu.zheng **at** gmail **dot** com

# lwIP #

> The raw TCP/IP interface allows the application program to integrate better with the TCP/IP code. Program execution is event based by having callback functions being called from within the TCP/IP code.
> 
> The raw TCP/IP interface is not only faster in terms of code execution time but is also less memory intensive.

[lwIP][]  
[lwIP@wikipedia][lwIP_wikipedia]

[《基于回调的lwIP raw API》][lwIP raw API]

# Nginx #

> Nginx uses an asynchronous event-driven approach to handling requests. Nginx’s modular event-driven architecture can provide more predictable performance under high loads.

[Nginx][]  
[Nginx@wikipedia][Nginx_wikipedia]

[《深入理解Nginx：模块开发与架构解析（第2版） 》][Nginx_2_]

*  第8章　Nginx基础架构
    
     *  8.2　Nginx的架构设计
        
         *  8.2.2　事件驱动架构
         *  8.2.3　请求的多阶段异步处理

# Node.js #

> Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.

[Node.js][]  
[Node.js@wikipedia][Node.js_wikipedia]

[《深入浅出Node.js》][Node.js 1]

*  第 3 章　异步I/O
 *  第 4 章　异步编程

# Linux AIO #

> 使用异步 I/O 可以帮助我们构建 I/O 速度更快、效率更高的应用程序。如果我们的应用程序可以对处理和 I/O 操作重叠进行，那么 AIO 就可以帮助我们构建可以更高效地使用可用 CPU 资源的应用程序。

[《使用异步 I/O 大大提高应用程序的性能》][I_O]

# JavaScript #

[《JavaScript异步编程：设计快速响应的网络应用》][JavaScript]

*  第1章 深入理解JavaScript事件
 *  第2章 分布式事件

[《你不知道的JavaScript（中卷）》][JavaScript 1]

*  第二部分　异步和性能
 *  第 1 章　异步：现在与将来
 *  第 2 章　回调

# [libevent][] #

> The libevent API provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. Furthermore, libevent also support callbacks due to signals or regular timeouts.

# [libev][] #

> A full-featured and high-performance event loop that is loosely modelled after libevent, but without its limitations and bugs.

# [libuv][] #

Node.js 用的就是libuv。

> libuv is a multi-platform support library with a focus on asynchronous I/O.

# [Redis][] #

[http_blog.csdn.net_zoomdy_article_details_61916610]: http://blog.csdn.net/zoomdy/article/details/61916610
[lwIP]: http://savannah.nongnu.org/projects/lwip/
[lwIP_wikipedia]: https://en.wikipedia.org/wiki/LwIP
[lwIP raw API]: http://blog.csdn.net/zoomdy/article/details/61917080
[Nginx]: https://nginx.org/
[Nginx_wikipedia]: https://en.wikipedia.org/wiki/Nginx
[Nginx_2_]: http://product.dangdang.com/23910258.html
[Node.js]: https://nodejs.org/en/
[Node.js_wikipedia]: https://en.wikipedia.org/wiki/Node.js
[Node.js 1]: http://www.ituring.com.cn/book/1290
[I_O]: https://www.ibm.com/developerworks/cn/linux/l-async/
[JavaScript]: http://www.ituring.com.cn/book/1132
[JavaScript 1]: http://www.ituring.com.cn/book/1563
[libevent]: http://libevent.org/
[libev]: http://libev.schmorp.de
[libuv]: http://libuv.org/
[Redis]: https://redis.io/