Libevent Library Learning

1、libevent Introduce
Libevent It's a use. C language-written 、 Lightweight open source high performance event notification Library , There are mainly the following highlights ： Event driven （ event-driven）, High performance ; Lightweight , Focus on the Internet , Not as good as ACE So bloated ; The source code is quite refined 、 Easy to read ; Cross platform , Support Windows、 Linux、 *BSD and Mac Os; Support for multiple I/O Multiplexing technology , epoll、 poll、 dev/poll、 select and kqueue etc. ; Support I/O, Events such as timers and signals ; Register event priority .
Libevent It has been widely used , As the underlying network library ; such as memcached、 Vomit、 Nylon、 Netchat wait .

2、 install

Official website ：libevent

What I use here is 2.1.8 edition ,linux It uses ubuntu20.4. Install with original code .

（1） decompression 
（2）./configure              #  Check the installation environment   Generate  makefile
（3）make                     #  Generate  .o  and   Executable file 
（4）sudo make install        #  The necessary resources cp Set the system specified directory .

3、 Check if the installation is successful

Get into sample Under the path

  Here are some small demo You can test whether the book is successfully installed

  This means that the installation is successful .

4、 Check the installation path

  Header file in include Inside