One Event Que and One Event Handling goroutine for every Proxy

[ChengAnXu2014]

Since GO's goroutine is lightweight thread and GO's Channel is perfect Queue, is very easy to give every Proxy a goroutine and Event Que.
In every goroutine use a loop to get Event from Event Que and handle it.
The problem is how to "flush" a Proxy Event Que?
My anser is to use a Mark Event.
A Mark Event markEvt is a special Event which hold a Channel markEvt.SyncCh=make(chan byte, 1).
When I wanna "flush" Proxy pA's Event Que, I use Display.Sync to get a Callback, in Callback's DoneHandler I put a Mark Event markEvt in pA's Event Que ch:=make(chan byte,1);pA.EvtQue<-&Event{SyncCh: ch}, and use <-ch to block my goroutine.
When pA's Event Handle Loop get a Event evt that evt.SyncCh!=nil, it will use evt.SyncCh<-0 to unblock my goroutine.