Linux模型非阻塞的相关内容

文章 2018-07-23 来自：开发者社区

Linux IO模型：阻塞/非阻塞/IO复用同步/异步 Select/Epoll/AIO

IO概念 Linux的内核将所有外部设备都可以看做一个文件来操作。那么我们对与外部设备的操作都可以看做对文件进行操作。我们对一个文件的读写，都通过调用内核提供的系统调用；内核给我们返回一个file descriptor（fd,文件描述符）。而对一个socket的读写也会有相应的描述符，称为socketfd(socket描述符）。描述符就是一个数字，指向内核中一个结构体（文件路径，数据区，等一些属....

文章 2018-01-08 来自：开发者社区

Linux IO模型漫谈（4）- 非阻塞IO

首先先说一下，阻塞IO会在哪些地方阻塞住呢？输入操作read, 输出操作write，接受请求操作accept，发送请求操作connect，这四个地方阻塞进程。非阻塞IO的模型图示在前面的章节有讲过，它和阻塞IO的最大区别就是：如果连接或者操作不能立即建立，那么连接的建立照样能发起，只是会返回一个错误信息。同样，先说明几个用到的函数和操作： 1 fcntl函数其全名为”file contro....

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更新时间 2024-02-14 09:32:06

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