,线程的封装源代码，以及线程组的封装。并采用消息控制线程的方法。 -, The thread package source code, as well as the thread group of packages. And using the message thread of control methods.

linux在内核模式下实现processtree功能，遍历系统当前所有进程的任务描述符，并按进程父子关系将这些描述符所对应的进程id（PID）组织成树形结构显示；-Linux in kernel mode achieve processtree functions, traverse the system of all current process task descr iptors, according to the process of parent-child relationship

Thread Group is a means of organizing threads into a hierarchical structure Source Code for Linux.