LÖVE

Posted: **Sat Jul 04, 2015 1:04 am**

Hey, so the current system I'm using for my game runs basically everything on nested coroutines to avoid stack overflow and such.

This is code that I put in main.lua, which is called by other scripts which are being required by this script:

Code: Select all

_G.GlobalData = {}
local CurrentLevel
local QueueLevel -- This will avoid stack overflow from recursion
local QueueLevelArgs = {}
function GlobalData.SetLevel(name, ...)
	QueueLevelArgs = {...}
	-- (Asset unloading code snipped)
	QueueLevel = name
	-- (Asset loading code snipped)
end

function love.update(deltaTime)
	if QueueLevel ~= nil then
		local temp = QueueLevel
		QueueLevel = nil
		-- (Some other loading code here snipped)
		if CurrentLevel then
			coroutine.yield(CurrentLevel)
		end
		if temp == "EXIT" then return end
		CurrentLevel = coroutine.create(function() require(temp)(unpack(QueueLevelArgs)) end)
		coroutine.resume(CurrentLevel)
	end
end

When I run something like

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GlobalData.SetLEvel("MainMenu")

it will load up the MainMenu.lua script.

However, inside of THAT script, I'm also repeating the coroutine system between each menu screen. And when I try to yield the current menu screen (To end all code running there, which is why I'm using coroutines in the first place), i get an "attempt to yield across C-call boundary" error.

Is there an overall better way to go about this and avoid stack overflow? My current system (If you took out the error) loads each part separately and efficiently, ending all code that isn't needed. But is there a more efficient way to organize my threads than coroutines?

Posted: **Sat Jul 04, 2015 6:34 am**

Can you post an example of how your code looked when it was overflowing the call stack? There are probably better options than coroutines for avoiding that. Might be best to restructure things so you're not using so much recursion, but you could also probably do something simple like taking advantage of tail call elimination.

Posted: **Sat Jul 04, 2015 1:58 pm**

time thief wrote:Can you post an example of how your code looked when it was overflowing the call stack? There are probably better options than coroutines for avoiding that. Might be best to restructure things so you're not using so much recursion, but you could also probably do something simple like taking advantage of tail call elimination.

Alright, I've been searching everywhere, and I've found this.

I guess I was worried about the wrong problem, because you can call functions back and forth indefinitely. The "Attempt to yield across C-call boundary" error is a different problem for another thread.

I kind of solved my own problem.

LÖVE

[SOLVED] Yo dawg I heard you like coroutines

[SOLVED] Yo dawg I heard you like coroutines

Re: Yo dawg I heard you like coroutines

Re: Yo dawg I heard you like coroutines