minetest/builtin/async_event.lua

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local tbl = engine or minetest
local SCRIPTDIR = SCRIPTDIR or tbl.get_scriptdir()
minetest = tbl
dofile(SCRIPTDIR .. DIR_DELIM .. "serialize.lua")
tbl.async_jobs = {}
local function handle_job(jobid, serialized_retval)
local retval = tbl.deserialize(serialized_retval)
assert(type(tbl.async_jobs[jobid]) == "function")
tbl.async_jobs[jobid](retval)
tbl.async_jobs[jobid] = nil
end
if engine ~= nil then
tbl.async_event_handler = handle_job
else
minetest.register_globalstep(function(dtime)
for i, job in ipairs(tbl.get_finished_jobs()) do
handle_job(job.jobid, job.retval)
end
end)
end
function tbl.handle_async(func, parameter, callback)
-- Serialize function
local serialized_func = string.dump(func)
assert(serialized_func ~= nil)
-- Serialize parameters
local serialized_param = tbl.serialize(parameter)
if serialized_param == nil then
return false
end
local jobid = tbl.do_async_callback(serialized_func, serialized_param)
tbl.async_jobs[jobid] = callback
return true
end