[Lua] How to launch a background program/function

Victor, on 13 February 2013 - 04:59 AM said:

request = coroutine.create(function ()
while true do
  for x = 1,table.getn(reg) do
   rednet.send(reg[x].turtleid,"req")
  end
coroutine.resume(control)
end
end)

control = coroutine.create(function ()
while true do
  local turtid local msg
  while true  do
   local tab = {}
   turtid, msg = rednet.receive(4)
   if msg then
	tab = textutils.unserialize(msg)
	for x = 1,table.getn(reg) do
	 if turtid == reg[x].turtleid then
	  local tur = { name = reg[x].name, turtleid = turtid, location = tab[2], fuellevel = tab[1] }
	  table.remove(reg, x)
	  table.insert(reg, tur)
	  rednet.send(turtid,"got")
	  break
   else
	break
   end
	end
   end
  end
  coroutine.yield()
end
end)

function testmain()
   while true do
	  local m = read()
	  print(m)
   end
end

function test()
   coroutine.resume(request)
end

parallel.waitForAll(testmain(), test())

reg is the table that I use to store all turtles' info. Basically 'request' sends every turtle in the reg table a request and then resumes control. Control recieves the info and replaces the old info in the table with the new one for each turtle until recieve(4) times out in which case control yields and request runs again. This is an infinite loop and the reason I made 2 coroutines for this is to in the future add a control switch to the 'control' to block or delay its yield if certain conditions are met in the main function.

The problem is when I use parallel.waitForAny with 2 functions, first one being my main function and second being a function simply resumes(starts) 'request', the second one never works because my main function never returns. When I test it by replacing the main function with a simple infinite loop read() func(like in the code), again the second function(hence the coroutines) never start. I can't seem to run them simultaneously.

Thanks.

edit: Forgot some code.