These documents are Copyright (c) 2009-2010 by Nick Mathewson, and are made available under the Creative Commons Attribution-Noncommercial-Share Alike license, version 3.0. Future versions may be made available under a less restrictive license.

Additionally, the source code examples in these documents are also licensed under the so-called "3-Clause" or "Modified" BSD license. See the license_bsd file distributed with these documents for the full terms.

For the latest version of this document, see http://www.wangafu.net/~nickm/libevent-book/TOC.html

To get the source for the latest version of this document, install git and run "git clone git://github.com/nmathewson/libevent-book.git"

reference：http://www.wangafu.net/~nickm/libevent-book/