Fixes of various issues introduced by refactoring.

src/nxt_event_conn_proxy.c

@@ -85,6 +85,8 @@ nxt_event_conn_proxy_create(nxt_event_conn_t *client)
 
     thr = nxt_thread();
 
+    client->read_work_queue = &thr->engine->read_work_queue;
+    client->write_work_queue = &thr->engine->write_work_queue;
     client->socket.read_work_queue = &thr->engine->read_work_queue;
     client->socket.write_work_queue = &thr->engine->write_work_queue;
     peer->socket.read_work_queue = &thr->engine->read_work_queue;

src/nxt_event_engine.c

@@ -459,25 +459,39 @@ static nxt_work_handler_t
 nxt_event_engine_queue_pop(nxt_event_engine_t *engine, nxt_task_t **task,
     void **obj, void **data)
 {
-    nxt_work_queue_t  *wq;
+    nxt_work_queue_t  *wq, *last;
 
     wq = engine->current_work_queue;
+    last = wq;
 
     if (wq->head == NULL) {
         wq = &engine->fast_work_queue;
 
-        while (wq->head == NULL) {
+        if (wq->head == NULL) {
-            engine->current_work_queue++;
-            wq = engine->current_work_queue;
 
-            if (wq > &engine->final_work_queue) {
+            do {
-                engine->current_work_queue = &engine->fast_work_queue;
+                engine->current_work_queue++;
+                wq = engine->current_work_queue;
 
-                return NULL;
+                if (wq > &engine->final_work_queue) {
-            }
+                    wq = &engine->fast_work_queue;
+                    engine->current_work_queue = wq;
+                }
+
+                if (wq->head != NULL) {
+                    goto found;
+                }
+
+            } while (wq != last);
+
+            engine->current_work_queue = &engine->fast_work_queue;
+
+            return NULL;
         }
     }
 
+found:
+
     nxt_debug(&engine->task, "work queue: %s", wq->name);
 
     return nxt_work_queue_pop(wq, task, obj, data);

src/nxt_thread.c

@@ -193,7 +193,7 @@ nxt_thread_exit(nxt_thread_t *thr)
          * and link->task is already set to engine->task.
          * The link should be freed by the exit handler.
          */
-        link->work.obj =  thr->handle;
+        link->work.obj = (void *) (uintptr_t) thr->handle;
 
         nxt_event_engine_post(link->engine, &link->work);
     }