Add a function to AsyncQueue to tell if we are connected

asyncqueue.c

@@ -1238,3 +1238,14 @@ void *AsyncUnitGetQueueContext(pAsyncUnit unit)
   assert(unit->queue);
   return unit->queue->context;
 }
+
+
+int AsyncUnitIsQueueConnected(pAsyncUnit unit)
+{
+  assert(unit);
+  assert(unit->queue);
+  if (unit && unit->queue)
+    if (unit->queue->state == eAsyncConnected)
+      return 1;
+  return 0;
+}

asyncqueue.h

@@ -195,4 +195,8 @@ void *AsyncUnitSetQueueContext(pAsyncUnit handle, void *cntx);
  */
 void *AsyncUnitGetQueueContext(pAsyncUnit handle);
 
+/** \brief return one if queue is connected, zero otherwise
+ */
+int AsyncUnitIsQueueConnected(pAsyncUnit handle);
+
 #endif                          /* SICSASYNCQUEUE */