Added deques module, deprecating queues

lib/upcoming/asyncdispatch.nim

@@ -11,7 +11,7 @@ include "system/inclrtl"
 
 import os, oids, tables, strutils, times, heapqueue, lists
 
-import nativesockets, net, queues
+import nativesockets, net, deques
 
 export Port, SocketFlag
 
@@ -135,7 +135,7 @@ include "../includes/asyncfutures"
 type
   PDispatcherBase = ref object of RootRef
     timers: HeapQueue[tuple[finishAt: float, fut: Future[void]]]
-    callbacks: Queue[proc ()]
+    callbacks: Deque[proc ()]
 
 proc processTimers(p: PDispatcherBase) {.inline.} =
   while p.timers.len > 0 and epochTime() >= p.timers[0].finishAt:
@@ -143,7 +143,7 @@ proc processTimers(p: PDispatcherBase) {.inline.} =
 
 proc processPendingCallbacks(p: PDispatcherBase) =
   while p.callbacks.len > 0:
-    var cb = p.callbacks.dequeue()
+    var cb = p.callbacks.popFirst()
     cb()
 
 proc adjustedTimeout(p: PDispatcherBase, timeout: int): int {.inline.} =
@@ -1114,7 +1114,7 @@ else:
     new result
     result.selector = newSelector[AsyncData]()
     result.timers.newHeapQueue()
-    result.callbacks = initQueue[proc ()](64)
+    result.callbacks = initDeque[proc ()](64)
 
   var gDisp{.threadvar.}: PDispatcher ## Global dispatcher
   proc getGlobalDispatcher*(): PDispatcher =
@@ -1638,7 +1638,7 @@ proc recvLine*(socket: AsyncFD): Future[string] {.async.} =
 proc callSoon*(cbproc: proc ()) =
   ## Schedule `cbproc` to be called as soon as possible.
   ## The callback is called when control returns to the event loop.
-  getGlobalDispatcher().callbacks.enqueue(cbproc)
+  getGlobalDispatcher().callbacks.addLast(cbproc)
 
 proc runForever*() =
   ## Begins a never ending global dispatcher poll loop.