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Send digiline messages after luacontroller execution

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In the same way as for port settings, this queues up digiline messages
sent during the luacontroller's execution, and sends them afterwards.
This solves many problems, but one example:

1. Send a message, and receive a reply from another device.
2. While handling the reply event (effectively a nested invocation
   on the same luacontroller) make a change to memory
3. Notice that the memory change has no effect, because after
   completion of the reply handling, it stores the memory, but then
   the original invocation completes and overwrites it with it's
   own earlier copy of the same memory.
This commit is contained in:
Ciaran Gultnieks 2014-03-11 17:34:30 +00:00
parent a59f53d71a
commit 5002315ec9
1 changed files with 18 additions and 15 deletions
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33
mesecons_luacontroller/init.lua
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@ -2,7 +2,7 @@
-- ports = get_real_portstates(pos): gets if inputs are powered from outside
-- newport = merge_portstates(state1, state2): just does result = state1 or state2 for every port
-- action_setports(pos, rule, state): activates/deactivates the mesecons according to the portstates (helper for action)
-- action(pos, ports): Applies new portstates to a luacontroller at pos
-- action(pos, ports, digiline_msgs): Applies new portstates to a luacontroller at pos, and sends pending digiline messages
-- lc_update(pos): updates the controller at pos by executing the code
-- reset_meta (pos, code, errmsg): performs a software-reset, installs new code and prints error messages
-- reset (pos): performs a hardware reset, turns off all ports
@ -99,7 +99,7 @@ local setport = function (pos, rule, state)
end
end
local action = function (pos, ports)
local action = function (pos, ports, digiline_msgs)
local node = minetest.get_node(pos)
local name = node.name
local vports = minetest.registered_nodes[name].virtual_portstates
@ -116,6 +116,13 @@ local action = function (pos, ports)
if ports.c ~= vports.c then setport(pos, rules.c, ports.c) end
if ports.d ~= vports.d then setport(pos, rules.d, ports.d) end
end
if digiline then
for i = 1, #digiline_msgs do
digiline:receptor_send(pos, digiline.rules.default,
digiline_msgs[i].channel, digiline_msgs[i].msg)
end
end
end
--------------------
@ -219,15 +226,6 @@ local getinterrupt = function(pos)
return interrupt
end
local getdigiline_send = function (pos)
local digiline_send = function (channel, msg)
if digiline then
digiline:receptor_send(pos, digiline.rules.default, channel, msg)
end
end
return digiline_send
end
local create_environment = function(pos, mem, event)
-- Gather variables for the environment
local vports = minetest.registered_nodes[minetest.get_node(pos).name].virtual_portstates
@ -239,7 +237,10 @@ local create_environment = function(pos, mem, event)
pin = merge_portstates(vports, rports),
port = vports,
interrupt = getinterrupt(pos),
digiline_send = getdigiline_send(pos),
digiline_msgs = {},
digiline_send = function(channel, msg)
table.insert(lc_digiline_msgs, {["channel"]=channel, ["msg"]=msg})
end,
mem = mem,
tostring = tostring,
tonumber = tonumber,
@ -356,6 +357,7 @@ end
-- Parsing function --
----------------------
lc_digiline_msgs = nil
lc_update = function (pos, event)
local meta = minetest.get_meta(pos)
if not interrupt_allow(meta, event) then return end
@ -371,6 +373,7 @@ lc_update = function (pos, event)
local env = create_environment(pos, mem, event)
-- create the sandbox and execute code
lc_digiline_msgs = {}
local chunk, msg = create_sandbox (code, env)
if not chunk then return msg end
local success, msg = pcall(f)
@ -379,8 +382,8 @@ lc_update = function (pos, event)
save_memory(meta, mem)
-- Actually set the ports
minetest.after(0, action, pos, env.port)
-- Actually set the ports and send digiline messages
minetest.after(0, action, pos, env.port, lc_digiline_msgs)
end
local reset_meta = function(pos, code, errmsg)
@ -399,7 +402,7 @@ end
local reset = function (pos)
minetest.get_meta(pos):set_string("lc_interrupts", "")
action(pos, {a=false, b=false, c=false, d=false}, true)
action(pos, {a=false, b=false, c=false, d=false}, {})
end
-- ______