forked from mtcontrib/pipeworks
rewrite parts of the teleportation tube to avoid a few grave performance issues:
* don't forceload the block of every single tube in the world on every item being send through any one of them * cache file contents to avoid unnecessary reads on every single item send through a tp tube * reduce redundant metadata and table lookups * reduce write operations during the same changes to a file still to do is a switch from an arraylist-table to a hashmap-table to make lookups and updates on the cache faster
This commit is contained in:
Tim
Vanessa Ezekowitz
parent
9a83380b2b
commit
82a7b6a749
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@ -1,53 +1,59 @@
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local filename=minetest.get_worldpath() .. "/teleport_tubes"
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local function read_file()
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local f = io.open(filename, "r")
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if f == nil then return {} end
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local t = f:read("*all")
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f:close()
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if t == "" or t == nil then return {} end
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return minetest.deserialize(t)
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end
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local tp_tube_db = nil -- nil forces a read
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local function write_file(tbl)
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local f = io.open(filename, "w")
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f:write(minetest.serialize(tbl))
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f:close()
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end
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local function read_tube_db()
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local file = io.open(filename, "r")
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if file ~= nil then
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local file_content = file:read("*all")
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io.close(file)
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local function update_pos_in_file(pos)
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local tbl=read_file()
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for _, val in ipairs(tbl) do
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if val.x == pos.x and val.y == pos.y and val.z == pos.z then
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local meta = minetest.get_meta(val)
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val.channel = meta:get_string("channel")
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val.cr = meta:get_int("can_receive")
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if file_content and file_content ~= "" then
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tp_tube_db = minetest.deserialize(file_content)
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return tp_tube_db-- we read sucessfully
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end
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end
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write_file(tbl)
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tp_tube_db = {}
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return tp_tube_db
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end
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local function add_tube_in_file(pos,channel, cr)
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local tbl=read_file()
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for _,val in ipairs(tbl) do
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if val.x==pos.x and val.y==pos.y and val.z==pos.z then
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local function save_tube_db()
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local file, err = io.open(filename, "w")
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if file then
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file:write(minetest.serialize(tp_tube_db))
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io.close(file)
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else
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error(err)
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end
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end
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-- updates or adds a tube
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local function set_tube(pos, channel, can_receive)
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local tubes = tp_tube_db or read_tube_db()
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for _, val in ipairs(tubes) do
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if val.x == pos.x and val.y == pos.y and val.z == pos.z then
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val.channel = channel
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val.cr = can_receive
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save_tube_db()
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return
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end
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end
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table.insert(tbl,{x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=cr})
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write_file(tbl)
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-- we haven't found any tp tube to update, so lets add it
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table.insert(tp_tube_db,{x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=cr})
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save_tube_db()
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end
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local function remove_tube_in_file(pos)
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local tbl = read_file()
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local function remove_tube(pos)
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local tubes = tp_tube_db or read_tube_db()
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local newtbl = {}
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for _, val in ipairs(tbl) do
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for _, val in ipairs(tubes) do
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if val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z then
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table.insert(newtbl, val)
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end
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end
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write_file(newtbl)
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tp_tube_db = newtbl
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save_tube_db()
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end
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local function read_node_with_vm(pos)
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@ -58,39 +64,35 @@ local function read_node_with_vm(pos)
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return minetest.get_name_from_content_id(data[area:index(pos.x, pos.y, pos.z)])
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end
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local function get_tubes_in_file(pos,channel)
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local tbl = read_file()
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local newtbl = {}
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local function get_receivers(pos,channel)
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local tubes = tp_tube_db or read_tube_db()
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local receivers = {}
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local changed = false
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for _, val in ipairs(tbl) do
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local meta = minetest.get_meta(val)
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local name = read_node_with_vm(val)
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local is_loaded = (minetest.get_node_or_nil(val) ~= nil)
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local is_teleport_tube = minetest.registered_nodes[name] and minetest.registered_nodes[name].is_teleport_tube
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if is_teleport_tube then
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if is_loaded and (val.channel ~= meta:get_string("channel") or val.cr ~= meta:get_int("can_receive")) then
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val.channel = meta:get_string("channel")
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val.cr = meta:get_int("can_receive")
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for _, val in ipairs(tubes) do
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-- skip all non-receivers and the tube that it came from as early as possible, as this is called often
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if (val.cr == 1 and val.channel == channel and (val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z)) then
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local is_loaded = (minetest.get_node_or_nil(val) ~= nil)
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local node_name = is_loaded and minetest.get_node(pos).name or read_node_with_vm(val)
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if minetest.registered_nodes[node_name] and minetest.registered_nodes[node_name].is_teleport_tube then
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table.insert(receivers, val)
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else
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val.to_remove = true
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changed = true
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end
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if val.cr == 1 and val.channel == channel and (val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z) then
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table.insert(newtbl, val)
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end
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else
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val.to_remove = true
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changed = true
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end
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end
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if changed then
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local updated = {}
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for _, val in ipairs(tbl) do
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for _, val in ipairs(tubes) do
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if not val.to_remove then
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table.insert(updated, val)
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end
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end
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write_file(updated)
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tp_tube_db = updated
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save_tube_db()
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end
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return newtbl
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return receivers
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end
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local teleport_noctr_textures={"pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png",
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@ -102,11 +104,11 @@ local teleport_end_textures={"pipeworks_teleport_tube_end.png","pipeworks_telepo
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local teleport_short_texture="pipeworks_teleport_tube_short.png"
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local teleport_inv_texture="pipeworks_teleport_tube_inv.png"
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local function set_teleport_tube_formspec(meta)
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local cr = meta:get_int("can_receive") ~= 0
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local function set_teleport_tube_formspec(meta, can_receive)
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local cr = (can_receive ~= 0)
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meta:set_string("formspec","size[10.5,1;]"..
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"field[0,0.5;7,1;channel;Channel:;${channel}]"..
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"button[8,0;2.5,1;"..(cr and "cr0" or "cr1")..";"..
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"field[0,0.5;7,1;channel;Channel:;${channel}]"..
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"button[8,0;2.5,1;"..(cr and "cr0" or "cr1")..";"..
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(cr and "Send and Receive" or "Send only").."]")
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end
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@ -120,7 +122,7 @@ pipeworks.register_tube("pipeworks:teleport_tube","Teleporting Pneumatic Tube Se
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velocity.z = 0
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local meta = minetest.get_meta(pos)
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local channel = meta:get_string("channel")
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local target = get_tubes_in_file(pos,channel)
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local target = get_receivers(pos, channel)
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if target[1] == nil then return {} end
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local d = math.random(1,#target)
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pos.x = target[d].x
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@ -133,48 +135,57 @@ pipeworks.register_tube("pipeworks:teleport_tube","Teleporting Pneumatic Tube Se
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local meta = minetest.get_meta(pos)
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meta:set_string("channel","")
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meta:set_int("can_receive",1)
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add_tube_in_file(pos,"")
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set_teleport_tube_formspec(meta)
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set_tube(pos, "", 1)
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set_teleport_tube_formspec(meta, 1)
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end,
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on_receive_fields = function(pos,formname,fields,sender)
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local meta = minetest.get_meta(pos)
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--check for private channels
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if fields.channel ~= nil then
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local can_receive = meta:get_int("can_receive")
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if fields.channel then
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-- check for private channels
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local sender_name = sender:get_player_name()
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local name, mode = fields.channel:match("^([^:;]+)([:;])")
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if name and mode and name ~= sender:get_player_name() then
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if name and mode and name ~= sender_name then
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--channels starting with '[name]:' can only be used by the named player
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if mode == ":" then
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minetest.chat_send_player(sender:get_player_name(), "Sorry, channel '"..fields.channel.."' is reserved for exclusive use by "..name)
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minetest.chat_send_player(sender_name, "Sorry, channel '"..fields.channel.."' is reserved for exclusive use by "..name)
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return
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--channels starting with '[name];' can be used by other players, but cannot be received from
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elseif mode == ";" and (fields.cr1 or (meta:get_int("can_receive") ~= 0 and not fields.cr0)) then
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minetest.chat_send_player(sender:get_player_name(), "Sorry, receiving from channel '"..fields.channel.."' is reserved for "..name)
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elseif mode == ";" and (fields.cr1 or (can_receive ~= 0 and not fields.cr0)) then
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minetest.chat_send_player(sender_name, "Sorry, receiving from channel '"..fields.channel.."' is reserved for "..name)
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return
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end
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end
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-- save channel if we set one
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meta:set_string("channel", fields.channel)
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end
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if fields.channel==nil then fields.channel=meta:get_string("channel") end
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meta:set_string("channel",fields.channel)
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remove_tube_in_file(pos)
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if fields.cr0 then meta:set_int("can_receive", 0) end
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if fields.cr1 then meta:set_int("can_receive", 1) end
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local cr = meta:get_int("can_receive")
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add_tube_in_file(pos, fields.channel, meta:get_int("can_receive"))
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set_teleport_tube_formspec(meta)
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-- make sure we have a channel, either the newly set one or the one from metadata
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local channel = fields.channel or meta:get_string("channel")
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if fields.cr0 and can_receive ~= 0 then
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can_receive = 0
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meta:set_int("can_receive", can_receive)
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elseif fields.cr1 and can_receive ~= 1 then
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can_receive = 1
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meta:set_int("can_receive", can_receive)
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end
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set_tube(pos, fields.channel, can_receive)
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set_teleport_tube_formspec(meta, can_receive)
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end,
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on_destruct = function(pos)
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remove_tube_in_file(pos)
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end})
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remove_tube(pos)
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end
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})
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if minetest.get_modpath("mesecons_mvps") ~= nil then
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mesecon.register_on_mvps_move(function(moved_nodes)
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for _, n in ipairs(moved_nodes) do
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if string.find(n.node.name, "pipeworks:teleport_tube") ~= nil then
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update_pos_in_file(n.pos)
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local meta = minetest.get_meta(n.pos)
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set_tube(n.pos, meta:get_string("channel"), meta:get_int("can_receive"))
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end
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end
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end)
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