Re: 答复: A problem about coroutine's status

[Scott Vokes <vokes.s@...>]

2009/3/29 lee <leeyacn@126.com>:
> Ok, it looks direct.
> To me, the difference between running and normal is obscure.
> What "normal" means ?
A coroutine's status is normal when it has been resumed, but has
itself resumed another, so it isn't the most directly active one. It's
running, but it's not the result of coroutine.running().

=====

local sub_cr =
   coroutine.create(function(caller)
                       print("in sub-coroutine")
                       print(" -- sub_coroutine status: "
                             .. coroutine.status(coroutine.running()))
                       print(" -- caller status: "
                             .. coroutine.status(caller))
                    end)
local caller_cr =
   coroutine.create(function(to_call)
                       print("in caller coroutine, about to resume
sub_coroutine")
                       coroutine.resume(to_call, coroutine.running())
                       print("back in caller")
                       print(" -- caller status: "
                             .. coroutine.status(coroutine.running()))
                    end)

coroutine.resume(caller_cr, sub_cr)

===== yields =====

> dofile("/tmp/lua-268182el")
in caller coroutine, about to resume sub_coroutine
in sub-coroutine
 -- sub_coroutine status: running
 -- caller status: normal
back in caller
 -- caller status: running


Hope that helps,
Scott Vokes