reorganize some stuff

modules/core_lib/dispatcher.lua

@@ -0,0 +1,33 @@
+local eventId = 0
+local eventList = {}
+
+function scheduleEvent(func, delay)
+  eventId = eventId + 1
+  local id = eventId
+  local function proxyFunc()
+    if eventList[id] then
+      if eventList[id].active then
+        func()
+      end
+      eventList[id] = nil
+    end
+  end
+  eventList[id] = { func = proxyFunc, active = true }
+  if delay and delay > 0 then
+    g_dispatcher.scheduleEvent(proxyFunc, delay)
+  else
+    g_dispatcher.addEvent(proxyFunc, false)
+  end
+  return id
+end
+
+function addEvent(func)
+  return scheduleEvent(func, 0)
+end
+
+function removeEvent(id)
+  if id and eventList[id] then
+    eventList[id].active = false
+    return true
+  end
+end