Plainly LUA's co-process (Coroutine)

The threads in the process and multithreading are similar: have their own stacks, their own local variables, have their own instruction pointers, but share global variables and other information with other collaborators. The main difference between a thread and a coprocessor is that, in a multiprocessor case, multithreading is conceptually running multiple threads at the same time, and the co-process is done through collaboration, with only one thread running at any time. And this will only be suspended if the running process is explicitly required to be suspended.
You can use Coroutine.create to create a process: CO = coroutine.create (function () print ("HI") end)
There are three states of association: Hang, Run, stop. is suspended after creation, that is, does not run automatically. The status function can view the current state. The real strength of the process is that he can suspend a running piece of code through the yield function.
LUA's Resume-yield can exchange data with each other. If there is no yield, the extra parameters passed to the resume are passed as parameters to the main function of the master:
CO = coroutine.create (function (A, B, c) print ("Co", A, B, c) end) Coroutine.resume (CO, 1, 2, 3)
If there is no error, resume will return true and yield parameters: Co = coroutine.create (function (A, B) Coroutine.yield (A+b, A-a) end) print (coroutine . Resume (Co, 3, 8))
In the same way, yield returns the arguments passed by the corresponding resume: CO = coroutine.create (function ()
Print ("Co", Coroutine.yield ())
End
Coroutine.resume (CO)
Coroutine.resume (Co, 4, 5)
Finally, the return value of the Master function is the return value of the resume that corresponds to it (the first argument is true). CO = coroutine.create (function ()
Return 6, 7
End
Print (Coroutine.resume (CO))
Finish