Code reading - ten C open source projects

Code reading —— ten C Open source project

1. Webbench

Webbench It's a linux Under the use of a very simple website pressure testing tool . It USES fork() Simulate multiple clients accessing our settings at the same time URL, Test the performance of a website under pressure , You can simulate at most 3 Ten thousand concurrent connections to test the load capacity of the website .Webbench Use C Language writing , The code is so simple , The source code adds up to less than 600 That's ok . Download link ：http://home.tiscali.cz/~cz210552/webbench.html

2. CMockery

cmockery yes google Published for C A lightweight framework for unit testing . It's small , No dependence on other open source packages , It is less invasive to the tested code .cmockery Less than lines of source code for 3K, You read will_return and mock The source code is clear at a glance .

The main features ：

Free and open source ,google Provide technical support ;

Lightweight framework , Make testing faster and easier ;

Avoid complex compiler features , For older compilers , Compatibility is good. ;

It is not mandatory that the code under test must rely on C99 standard , This feature is very useful for the development of many embedded systems

Download link ：http://code.google.com/p/cmockery/downloads/list

3. Libev

libev Is an open source event driven Library , be based on epoll,kqueue etc. OS Infrastructure provided . It's known for its efficiency , It can be IO event , Timer , Unified with the signal , Unified under the framework of event processing . be based on Reactor Pattern , More efficient , And the code is streamlined （4.15 edition 8000 Multiple lines ）, It's a good resource for learning event driven programming . Download link ：http://software.schmorp.de/pkg/libev.html

4. Memcached

Memcached Is a high performance distributed memory object caching system , For dynamic Web Application to reduce database load . It reduces the number of database reads by caching data and objects in memory , So as to provide the speed of dynamic database driven website .Memcached Based on a storage key / Value pairs hashmap.Memcached-1.4.7 The amount of code is acceptable , Only 10K Row or so . Download address ：http://memcached.org/

5. Lua

Lua great ,Lua It was invented by Brazilians , I'm not happy with all this , But not to blush , At most, I'm red eyed .

What makes me blush is Lua Source code , One hundred percent of ANSI C, It's not adulterated at all . In any support ANSI C Compiler platform can be easily compiled through . I tried , There's no bullshit at all .Lua The amount of code is small enough ,5.1.4 only 1.5W That's ok , Remove the blank lines and comments, it is estimated that 1W That's ok . Download address ：http://www.lua.org/

6. SQLite

SQLite Is an open source embedded relational database , Realize self containment 、 Zero configuration 、 Supporting affairs SQL Database engine . It is characterized by a high degree of portability 、 Easy to use 、 Compact structure 、 Efficient 、 reliable . Small enough , roughly 3 Line ten thousand C Code ,250K. Download address ：http://www.sqlite.org/ .

7. Redis

Redis It's a use. ANSI C Open source data structure server written .Redis The code of is very easy to read , The code is written neatly , And the amount of code is relatively small （4.5w That's ok , In fact, it is not very small ）. Most of them are single threaded , Hardly rely on other libraries . Download address ：redis.io/

8. Nginx

Nginx(“engine x”) Is a high-performance HTTP And reverse proxy , Also a IMAP/POP3/SMTP proxy server .Nginx By Igor Sysoev Second most visited in Russia Rambler.ru Site development , It has been running on this site for more than four years .Igor Source code as class BSD Release in the form of license . since Nginx Four years since its release ,Nginx Because of its stability 、 Rich feature set 、 Example configuration files and low system resource consumption are well known .

nginx In addition to the excellent reflected in the program structure and code style ,nginx The source code organization of is also simple and clear , The directory structure has a clear hierarchy , It's worth learning . Download address ：http://nginx.org/en/download.html.

9. UNIXv6

UNIX V6 Kernel source code, including device drivers There are about 1 Line ten thousand , This amount of source code , Beginners can fully understand . There is a saying that the maximum amount of code a person can understand is 1 Line ten thousand ,UNIX V6 The number of kernel source code is just within this range . See here , Do you have it “ If only 1 If Wanxing, maybe I can learn ” What about the idea of ？

On the other hand , Recent operating systems , for example Linux The latest version of the kernel source code is said to exceed 1000 Line ten thousand . Even if you're not a beginner , It's basically impossible to fully understand all the code . Download address ：http://minnie.tuhs.org/cgi-bin/utree.pl?file=V6

10. NETBSD

NetBSD It's a free , Highly portable UNIX-like operating system , It's the most portable operating system in the world , It can be executed on many platforms , from 64bit alpha Servers to handheld devices and embedded devices .NetBSD The slogan of the plan is ：“Of course it runs NetBSD”. It has a simple design , Code specification , With many advanced features , It has been widely praised in the industry and academia . Because of its simple design and advanced features , Make it in production and Research , They all have excellent performance , And it also has complete source code supported by users . Many programs can easily pass through NetBSD Packages Collection get . Download address ：http://www.netbsd.org/