-local jobs = {}
-local time = 0.0
-local last = core.get_us_time() / 1000000
-
-core.register_globalstep(function(dtime)
- local new = core.get_us_time() / 1000000
- if new > last then
- time = time + (new - last)
- else
- -- Overflow, we may lose a little bit of time here but
- -- only 1 tick max, potentially running timers slightly
- -- too early.
- time = time + new
- end
- last = new
-
- if #jobs < 1 then
- return
- end
-
- -- Iterate backwards so that we miss any new timers added by
- -- a timer callback, and so that we don't skip the next timer
- -- in the list if we remove one.
- for i = #jobs, 1, -1 do
- local job = jobs[i]
- if time >= job.expire then
- core.set_last_run_mod(job.mod_origin)
- job.func(unpack(job.arg))
- table.remove(jobs, i)
- end
- end
-end)
-
-function core.after(after, func, ...)
- assert(tonumber(time) and type(func) == "function",
- "Invalid core.after invocation")
- jobs[#jobs + 1] = {
- func = func,
- expire = time + after,
- arg = {...},
- mod_origin = core.get_last_run_mod()
- }
-end
-