Separate from constructor so caller can easily make an array of LRUCache

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Returns a uniformly distributed value in the range [0..n-1] REQUIRES: n > 0

mutex hold

Iterator interface methods

set_group_name

user should hold lock_

only one bucket can scan at any time ?

Parse an object - create a new root, and populate. */

Replace array/object items with new ones. */

* 检查并创建一个目录或一个文件的父目录 * @param pszPath(const char *): 要检查的路径 * @see * @return 0(成功) * @return -1(失败) */

子进程退出处理

handle a single child status event */