libtask channel机理及调度理解

学习golang的时候libtask库的代码是一定要看的，需要深入理解chan和携程的运行机制，下面就结合libtask的源码说明下运行原理，如果理解的有偏差欢迎指正

下面是libtask中Channel的结构

 struct Alt
 {
   Channel   *c;
   void    *v;
   unsigned int  op;
   Task    *task;
   Alt   *xalt;
 };

 struct Altarray
 {
   Alt   **a;
   unsigned int  n;
   unsigned int  m;
 };

 struct Channel
 {
   unsigned int  bufsize;
   unsigned int  elemsize;
   unsigned char *buf;
   unsigned int  nbuf;
   unsigned int  off;
   Altarray  asend;
   Altarray  arecv;
   char    *name;
 };