1 files changed, 11 insertions, 1 deletions
diff --git a/lib/pure/asyncdispatch.nim b/lib/pure/asyncdispatch.nim
index 6a877be30..1697384e0 100644
--- a/lib/pure/asyncdispatch.nim
+++ b/lib/pure/asyncdispatch.nim
@@ -9,7 +9,7 @@
 
 include "system/inclrtl"
 
-import os, oids, tables, strutils, times, heapqueue, options
+import os, tables, strutils, times, heapqueue, options
 
 import nativesockets, net, deques
 
@@ -242,6 +242,11 @@ when defined(windows) or defined(nimdoc):
     if gDisp.isNil: gDisp = newDispatcher()
     result = gDisp
 
+  proc setGlobalDispatcher*(disp: PDispatcher) =
+    if not gDisp.isNil:
+      assert gDisp.callbacks.len == 0
+    gDisp = disp
+
   proc register*(fd: AsyncFD) =
     ## Registers ``fd`` with the dispatcher.
     let p = getGlobalDispatcher()
@@ -931,6 +936,11 @@ else:
     if gDisp.isNil: gDisp = newDispatcher()
     result = gDisp
 
+  proc setGlobalDispatcher*(disp: PDispatcher) =
+    if not gDisp.isNil:
+      assert gDisp.callbacks.len == 0
+    gDisp = disp
+
   proc update(fd: AsyncFD, events: set[Event]) =
     let p = getGlobalDispatcher()
     assert fd.SocketHandle in p.selector