Blocking threads

main.lua

---------------------
-- main.lua
---------------------

local printerThread
local time

local function printTextFromPrinterThread()
	local printText = printerThread:get('print')
	if printText then
		print(printText)
	end
end

function love.load()
	printerThread = love.thread.newThread( 'printerThread', 'printer.lua' )
	printerThread:start()
	time = 0
end

function love.update( dt )
	time = time + dt
	print('main thread')
	printTextFromPrinterThread()
end

function love.draw()
	local timeLabel = string.format( "%03.2i", time )
	love.graphics.print( timeLabel, 10, 10 )
end

printer.lua

---------------------
-- printer.lua
---------------------

local printQueue = {}
local thisThread = love.thread.getThread()

local function print(text)
	table.insert( printQueue, text )
end

local function printSomething()
	print('printer thread')
	print('hello')
	print('world')
end

local function sendPrints()
	if #printQueue > 0 and not thisThread:peek('print') then
		local prints = table.concat( printQueue, "\n" )
		thisThread:set('print', prints)
		printQueue = {}
	end
end

while true do
	printSomething()
	sendPrints()
end