fangcheng的专栏

自己用，有密码，勿下，下了也没用，嘿嘿。

libevent-1.1b ~ 1.4.13-stable ~ 2.0.3-alpha libevent-2.0.3-alpha.tar.gz [GPG Sig] - ChangeLog - Release 2009-11-19 libevent-1.4.13-stable.tar.gz [GPG Sig] - ChangeLog - Release 2009-11-17 libevent-1.4.12-stable.tar.gz [GPG Sig] - ChangeLog - Release 2009-07-24 libevent-2.0.2-alpha.tar.gz [GPG Sig] - ChangeLog - Release 2009-07-24 libevent-1.4.11-stable.tar.gz [GPG Sig] - ChangeLog - Release 2009-05-14 libevent-2.0.1-alpha.tar.gz [GPG Sig] - What's new - Release 2009-04-17 libevent-1.4.10-stable.tar.gz [GPG Sig] - ChangeLog - Release 2009-04-17 libevent-1.4.9-stable.tar.gz [GPG Sig] - ChangeLog - Release 2008-12-12 libevent-1.4.8-stable.tar.gz [GPG Sig] - ChangeLog - Release 2008-09-13 libevent-1.4.7-stable.tar.gz [GPG Sig] - ChangeLog - Release 2008-08-25 libevent-1.4.6-stable.tar.gz [GPG Sig] - ChangeLog - Release 2008-07-24 libevent-1.4.5-stable.tar.gz [GPG Sig] - ChangeLog - Release 2008-06-25 libevent-1.4.4-stable.tar.gz [GPG Sig] - ChangeLog - Release 2008-05-13 libevent-1.4.3-stable.tar.gz [GPG Sig] - ChangeLog - Release 2008-04-07 libevent-1.4.2-rc.tar.gz [GPG Sig] - ChangeLog - Release 2008-02-25 make Solaris event subsystems more reliable; from W.C.A. Wijngaards event_base_get_method(); from Springande Ulv fix HTTP/1.1 chunk formatting; from "propanbutan" allow 64-bit content lengths; from Scott Lamb and more... libevent-1.4.1-beta.tar.gz [GPG Sig] - ChangeLog - Release 2007-12-21 fixed some memory leaks and other misc cleanup; from Christopher Layne, Scott Lamb and Charles Kerr introduced event_reinit to deal with fork() improved efficiency of generated RPC structure performance improvements to Win32 backend and many more... libevent-1.4.0-beta.tar.gz [GPG Sig] - ChangeLog - Release 2007-11-11 a new RPC subsytem for writing distributed clients and servers almost everything is documented via Doxygen now many fixes and improvements to evdns and evhttp libevent now builds two additional libraries: libevent_core (containing only

libevent-1.1a.tar.gz [GPG Sig] - Release 2005-06-12 Minor reliability fixes. libevent-1.1.tar.gz [GPG Sig] - Release 2005-05-14 Performance improvements from Nick Mathewson. Work around for kqueue bug in Mac OS X 10.4.

libevent-1.1.tar.gz [GPG Sig] - Release 2005-05-14 Performance improvements from Nick Mathewson. Work around for kqueue bug in Mac OS X 10.4

libevent-1.0e.tar.gz [GPG Sig] - Release 2005-04-26 Important fix to bug in poll implementation introduced in 1.0d. libevent-1.0d.tar.gz [GPG Sig] - Release 2005-04-22 Several minor bug fixes and building of shared libraries. libevent-1.0c.tar.gz [GPG Sig] - Release 2005-04-03 Bug fixes for Windows, Solaris and improved logging interface. libevent-1.0b.tar.gz [GPG Sig] - Release 2005-01-13 Bug fixes for backwards compatibility. libevent-1.0a.tar.gz [GPG Sig] - Release 2005-01-03 Bug fixes for threaded applications. Thanks to Andrew Danforth. libevent-1.0.tar.gz [GPG Sig] - Release 2004-12-05 Support for multi-threaded applications - experimental. Event priorities with priority queues. Don't forget my wishlists :-). libevent-0.1.tar.gz - Release 2000-11-14

libevent-1.0d.tar.gz [GPG Sig] - Release 2005-04-22 Several minor bug fixes and building of shared libraries. libevent-1.0c.tar.gz [GPG Sig] - Release 2005-04-03 Bug fixes for Windows, Solaris and improved logging interface. libevent-1.0b.tar.gz [GPG Sig] - Release 2005-01-13 Bug fixes for backwards compatibility. libevent-1.0a.tar.gz [GPG Sig] - Release 2005-01-03 Bug fixes for threaded applications. Thanks to Andrew Danforth. libevent-1.0.tar.gz [GPG Sig] - Release 2004-12-05 Support for multi-threaded applications - experimental. Event priorities with priority queues. Don't forget my wishlists :-). libevent-0.1.tar.gz - Release 2000-11-14

libevent-1.0c.tar.gz [GPG Sig] - Release 2005-04-03 Bug fixes for Windows, Solaris and improved logging interface. libevent-1.0b.tar.gz [GPG Sig] - Release 2005-01-13 Bug fixes for backwards compatibility. libevent-1.0a.tar.gz [GPG Sig] - Release 2005-01-03 Bug fixes for threaded applications. Thanks to Andrew Danforth. libevent-1.0.tar.gz [GPG Sig] - Release 2004-12-05 Support for multi-threaded applications - experimental. Event priorities with priority queues. Don't forget my wishlists :-). libevent-0.1.tar.gz - Release 2000-11-14

libevent-1.0b.tar.gz 支援多執行緒

libevent-0.9.tar.gz 源码

libevent-0.8a.tar.gz

　　libevent是一个事件触发的网络库，适用于windows、linux、bsd等多种平台，内部使用select、epoll、kqueue等系统调用管理事件机制。著名的用于apache的php缓存库memcached据说也是libevent based，而且libevent在使用上可以做到跨平台，而且根据libevent官方网站上公布的数据统计，似乎也有着非凡的性能。 　　编译库代码，编译脚本会判断OS支持哪种类型的事件机制（select、epoll或kqueue），然后条件编译相应代码，供上层使用的接口仍然是保持统一的（否则也不能所谓的跨平台了）。在linux redhat as 4 u 2 上编译相当容易，configure以后make，make install就可以了，windows上编译似乎有点小麻烦，不过稍微改点东西也就通过了。 　　从代码中看，libevent支持用户使用三种类型的事件，分别是网络IO、定时器、信号三种，在定时器的实现上使用了RB tree的数据结构，以达到高效查找、排序、删除定时器的目的，网络IO上，主要关注了一下linux上的epoll（因为目前的开发主要在linux平台），结果发现libevent的epoll居然用的EPOLLLT，水平触发的方式用起来比较方便，不容易出错，但是在效率上可能比EPOLLET要低一些。 　　跟网络无关的，libevent也有一些缓冲区管理的函数，而且是c风格的函数，实用性不是太大。libevent没有提供缓存的函数。 　　虽然libevent实用上的价值不大，但它提供的接口形式还是不错的，实现类似的lib的时候仍然是可以参考的。 　　Libevent定时器的数据结构自version 1.4起已由红黑树改为最小堆（Min Heap），以提高效率；网络IO和信号的数据结构采用了双向链表(TAILQ)。在实现上主要有3种链表: EVLIST_INSERTED, EVLIST_ACTIVE, EVLIST_TIMEOUT，一个ev在这3种链表之间被插入或删除，处于EVLIST_ACTIVE链表中的ev最后将会被调度执行。 　　Libevent提供了DNS，HTTP Server，RPC等组件，HTTP Server可以说是Libevent的经典应用。从http.c可看到Libevent的很多标准写法。写非阻塞式的HTTP Server很容易将socket处理与HTTP协议处理纠缠在一起，Libevent在这点上似乎也有值得推敲的地方。

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