A simple resource pool implementation in lua

Lua Resource Pools.lua

-- Replace this function with your "new" function
local function NewItem()
	return { }
end

-- Storage of released items
local pool = {}

-- Get/create a new item
local function Acquire()
	local item = next(pool)
	if not item then
		item = NewItem()
	else
		pool[item] = nil
	end
	return item
end

-- Release an item to the pool
local function Release(item)
	if pool[item] then
		error("Attempt to release a item that was already released")
	end
	pool[item] = true	
end