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    New 'Threads' plugin - how to use it?

    Apollo14Apollo14 Member
    edited October 2018 in Code snippets
    Hi guys!
    I don't get why value of 'a' isn't changed in the end?
    require "Threads"
local thread = Thread.new()
 
local a=1
 
thread:setFunction(function()
	for i=1, 1000000 do
		a=a+1
	end
end)
 
thread:execute()
 
local timerDelayed = Timer.delayedCall(2000, function()
	print("a=",a) --prints a=1, though I expected a=1000000
end)
    Thx!

    p.s. and how to properly pass args?
    require "Threads"
local thread = Thread.new()
 
local a=1
 
thread:setFunction(function(arg)
	print(arg) --nothing prints, whole function isn't executed
	for i=1, 1000000 do
		a=a+1
	end
end)
 
thread:execute("test arg")
    > Newcomers roadmap: from where to start learning Gideros
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    Comments

    • SinisterSoftSinisterSoft Maintainer
      Accepted Answer
      The thread is a different instance of Lua - so imagine you are programming a new instance and running it with:
      for i=1, 1000000 do
	a=a+1
end
      passing 'a' to and from the new instance is best answered by @PaulR :)
      Coder, video game industry veteran (since the '80s, ❤'s assembler), arrested - never convicted hacker (in the '90s), dad of five, he/him (if that even matters!).
      https://deluxepixel.com
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    • Apollo14Apollo14 Member
      okay this code seems to be working now, thx @SinisterSoft !
      require "Threads"
local thread = Thread.new()
 
thread:setFunction(function(arg)
	local passedArg=arg
	local a=1
	for i=1, 1000000 do
		a=a+1
	end
	return a, passedArg
end)
 
thread:execute("passed arg string")
 
local timerDelayed = Timer.delayedCall(2000, function()
	local status,a,arg=thread:getResult()
	print(status) --prints 'true'
	print(a) --prints '1000001'
	print(arg) --prints 'passed arg string'
end)

      Likes: SinisterSoft

      > Newcomers roadmap: from where to start learning Gideros
      "What one programmer can do in one month, two programmers can do in two months." - Fred Brooks
      “The more you do coding stuff, the better you get at it.” - Aristotle (322 BC)
      +1 -1 (+1 / -0 )Share on Facebook
    • PaulRPaulR Member, Maintainer
      Yes, that's it. You can also yield from the thread and resume operation from the main thread state. I'm currently updating it, there's a couple of bugs too (like not being able to pass nil values) that have also been fixed. I'll write a tutorial on it soon!

      Likes: SinisterSoft, Apollo14, talis, pie

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    • keszeghkeszegh Member
      @PaulR, really exciting, thanks for your work.

      Likes: PaulR

      Longtitle Productions, creator of
      Fragmenter - animated loop machine and IKONOMIKON - the memory game
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