Remove timer() from LuaController and make interrupt() use the ActionQueue so that it will keep working when restarting the server

mesecons/actionqueue.lua

@@ -6,13 +6,13 @@ end
 
 -- If add_action with twice the same overwritecheck and same position are called, the first one is overwritten
 -- use overwritecheck nil to never overwrite, but just add the event to the queue
--- priority specifies the order actions are executed within one globalstep, highest by default
+-- priority specifies the order actions are executed within one globalstep, highest first
 -- should be between 0 and 1
 function mesecon.queue:add_action(pos, func, params, time, overwritecheck, priority)
 	-- Create Action Table:
 	time = time or 0 -- time <= 0 --> execute, time > 0 --> wait time until execution
 	priority = priority or 1
-	action = {	pos=mesecon:tablecopy(pos),
+	local action = {	pos=mesecon:tablecopy(pos),
 				func=func,
 				params=mesecon:tablecopy(params),
 				time=time,
@@ -50,7 +50,7 @@ end
 -- However, even that does not work in some cases, that's why we delay the time the globalsteps
 -- start to be execute by 5 seconds
 local get_highest_priority = function (actions)
-	local highestp = 0, highesti
+	local highestp = -1, highesti
 	for i, ac in ipairs(actions) do
 		if ac.priority > highestp then
 			highestp = ac.priority
@@ -70,7 +70,8 @@ minetest.register_globalstep(function (dtime)
 
 	mesecon.queue.actions = {}
 
-	-- sort actions in execute now (actions_now) and for later (mesecon.queue.actions)
+	-- sort actions into two categories:
+	-- those toexecute now (actions_now) and those to execute later (mesecon.queue.actions)
 	for i, ac in ipairs(actions) do
 		if ac.time > 0 then
 			ac.time = ac.time - dtime -- executed later

mesecons_luacontroller/init.lua

@@ -192,48 +192,21 @@ local safe_serialize = function(value)
 	return minetest.serialize(deep_copy(value))
 end
 
-local interrupt = function(params)
-	lc_update(params.pos, {type="interrupt", iid = params.iid})
-end
+mesecon.queue:add_function("lc_interrupt", function (pos, iid, luac_id)
+	-- There is no luacontroller anymore / it has been reprogrammed / replaced
+	if (minetest.get_meta(pos):get_int("luac_id") ~= luac_id) then return end
+	lc_update(pos, {type="interrupt", iid = iid})
+end)
 
 local getinterrupt = function(pos)
 	local interrupt = function (time, iid) -- iid = interrupt id
 		if type(time) ~= "number" then return end
-		local iid = iid or math.random()
-		local meta = minetest.get_meta(pos)
-		local interrupts = minetest.deserialize(meta:get_string("lc_interrupts")) or {}
-		local found = false
-		local search = safe_serialize(iid)
-		for _, i in ipairs(interrupts) do
-			if safe_serialize(i) == search then
-				found = true
-				break
-			end
-		end
-		if not found then
-			table.insert(interrupts, iid)
-			meta:set_string("lc_interrupts", safe_serialize(interrupts))
-		end
-		minetest.after(time, interrupt, {pos=pos, iid = iid})
+		luac_id = minetest.get_meta(pos):get_int("luac_id")
+		mesecon.queue:add_action(pos, "lc_interrupt", {iid, luac_id}, time, iid, 1)
 	end
 	return interrupt
 end
 
-local handle_timer = function(pos, elapsed)
-	local err = lc_update(pos, {type="timer"})
-	if err then print(err) end
-	return false
-end
-
-local gettimer = function(pos)
-	local timer = function (time)
-		if type(time) ~= "number" then return end
-		local nodetimer = minetest.get_node_timer(pos)
-		nodetimer:start(time)
-	end
-	return timer
-end
-
 local getdigiline_send = function(pos)
 	if not digiline then return end
 	-- Send messages on next serverstep
@@ -255,7 +228,6 @@ local create_environment = function(pos, mem, event)
 			pin = merge_portstates(vports, rports),
 			port = vports,
 			interrupt = getinterrupt(pos),
-			timer = gettimer(pos),
 			digiline_send = getdigiline_send(pos),
 			mem = mem,
 			tostring = tostring,
@@ -334,7 +306,6 @@ local do_overheat = function (pos, meta)
 	if overheat(meta) then
 		local node = minetest.get_node(pos)
 		minetest.swap_node(pos, {name = BASENAME.."_burnt", param2 = node.param2})
-		minetest.get_meta(pos):set_string("lc_interrupts", "")
 		minetest.after(0.2, overheat_off, pos) -- wait for pending operations
 		return true
 	end
@@ -348,20 +319,6 @@ local save_memory = function(meta, mem)
 	meta:set_string("lc_memory", safe_serialize(mem))
 end
 
-local interrupt_allow = function (meta, event)
-	if event.type ~= "interrupt" then return true end
-
-	local interrupts = minetest.deserialize(meta:get_string("lc_interrupts")) or {}
-	local search = safe_serialize(event.iid)
-	for _, i in ipairs(interrupts) do
-		if safe_serialize(i) == search then
-			return true
-		end
-	end
-
-	return false
-end
-
 local ports_invalid = function (var)
 	if type(var) == "table" then
 		return false
@@ -375,7 +332,6 @@ end
 
 lc_update = function (pos, event)
 	local meta = minetest.get_meta(pos)
-	if not interrupt_allow(meta, event) then return end
 	if do_overheat(pos, meta) then return end
 
 	-- load code & mem from memory
@@ -412,10 +368,10 @@ local reset_meta = function(pos, code, errmsg)
 		"image_button_exit[9.72,-0.25;0.425,0.4;jeija_close_window.png;exit;]"..
 		"label[0.1,5;"..errmsg.."]")
 	meta:set_int("heat", 0)
+	meta:set_int("luac_id", math.random(1, 1000000))
 end
 
 local reset = function (pos)
-	minetest.get_meta(pos):set_string("lc_interrupts", "")
 	action(pos, {a=false, b=false, c=false, d=false})
 end
 
@@ -541,14 +497,15 @@ minetest.register_node(nodename, {
 		reset(pos)
 		reset_meta(pos, fields.code)
 		local err = lc_update(pos, {type="program"})
-		if err then print(err) end
+		if err then
+			print(err)
 			reset_meta(pos, fields.code, err)
+		end
 	end,
 	on_timer = handle_timer,
 	sounds = default.node_sound_stone_defaults(),
 	mesecons = mesecons,
 	digiline = digiline,
-	is_luacontroller = true,
 	virtual_portstates = {	a = a == 1, -- virtual portstates are
 					b = b == 1, -- the ports the the
 					c = c == 1, -- controller powers itself
@@ -556,6 +513,7 @@ minetest.register_node(nodename, {
 	after_dig_node = function (pos, node)
 		mesecon:receptor_off(pos, output_rules)
 	end,
+	is_luacontroller = true,
 })
 end
 end
@@ -588,11 +546,12 @@ minetest.register_node(BASENAME .. "_burnt", {
 		reset(pos)
 		reset_meta(pos, fields.code)
 		local err = lc_update(pos, {type="program"})
-		if err then print(err) end
+		if err then
+			print(err)
 			reset_meta(pos, fields.code, err)
+		end
 	end,
 	sounds = default.node_sound_stone_defaults(),
-	is_luacontroller = true,
 	virtual_portstates = {a = false, b = false, c = false, d = false},
 })