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;
};