intervals.lua

   1 local unpack = unpack or table.unpack
   2 lua_async.intervals = {
   3         pool = {},
   4         executing = {},
   5         last_id = 0,
   6 }
   7
   8 function setInterval(callback, ms, ...)
   9         local id = lua_async.intervals.last_id + 1
  10         lua_async.intervals.last_id = id
  11         local step_time = (ms or 0) / 1000
  12         lua_async.intervals.pool[id] = {
  13                 time_left = step_time,
  14                 step_time = step_time,
  15                 callback = callback,
  16                 args = {...},
  17         }
  18         return id
  19 end
  20
  21 function clearInterval(id)
  22         lua_async.intervals.pool[id] = nil
  23         lua_async.intervals.executing[id] = nil
  24 end
  25
  26 function lua_async.intervals.step(dtime)
  27         lua_async.intervals.executing = {}
  28
  29         for k, v in pairs(lua_async.intervals.pool) do
  30                 lua_async.intervals.executing[k] = v
  31         end
  32
  33         for id, interval in pairs(lua_async.intervals.executing) do
  34                 interval.time_left = interval.time_left - dtime
  35
  36                 if interval.time_left <= 0 then
  37                         interval.callback(unpack(interval.args))
  38                         interval.time_left = interval.step_time
  39                 end
  40         end
  41 end
  42