go源码阅读 container/ring go

一、介绍
ring是一个首尾相连的list，源码位于 src/container/ring/ring.go
其中每一个元素的定义如下：

// A Ring is an element of a circular list, or ring. // Rings do not have a beginning or end; a pointer to any ring element // serves as reference to the entire ring. Empty rings are represented // as nil Ring pointers. The zero value for a Ring is a one-element // ring with a nil Value. // type Ring struct { next, prev *Ring Valueinterface{} // for use by client; untouched by this library }

【go源码阅读 container/ring】通过New方法可以创建一个特定大小的ring，例如：