fix S4U chord example \o/

[simgrid.git] / examples / s4u / dht-chord / s4u_dht-chord.hpp

diff --git a/examples/s4u/dht-chord/s4u_dht-chord.hpp b/examples/s4u/dht-chord/s4u_dht-chord.hpp
index a8c81eb..a415bf9 100644 (file)
--- a/examples/s4u/dht-chord/s4u_dht-chord.hpp
+++ b/examples/s4u/dht-chord/s4u_dht-chord.hpp
@@ -1,5 +1,4 @@
-/* Copyright (c) 2016. The SimGrid Team.
-* All rights reserved.                                                     */
+/* Copyright (c) 2016-2017. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -119,20 +118,19 @@ public:
       join(known_id_);
     }
 
-    if (!joined)
+    if (not joined)
       return;
-    ChordMessage* message              = nullptr;
     void* data                         = nullptr;
-    double now                         = simgrid::s4u::Engine::instance()->getClock();
+    double now                         = simgrid::s4u::Engine::getClock();
     double next_stabilize_date         = start_time_ + PERIODIC_STABILIZE_DELAY;
     double next_fix_fingers_date       = start_time_ + PERIODIC_FIX_FINGERS_DELAY;
     double next_check_predecessor_date = start_time_ + PERIODIC_CHECK_PREDECESSOR_DELAY;
     double next_lookup_date            = start_time_ + PERIODIC_LOOKUP_DELAY;
-
+    simgrid::s4u::CommPtr comm_receive = nullptr;
     while ((now < (start_time_ + deadline_)) && now < MAX_SIMULATION_TIME) {
-      data                             = nullptr;
-      simgrid::s4u::Comm& comm_receive = simgrid::s4u::this_actor::irecv(mailbox_, &data);
-      while ((now < (start_time_ + deadline_)) && now < MAX_SIMULATION_TIME && !comm_receive.test()) {
+      if (comm_receive == nullptr)
+        comm_receive = simgrid::s4u::this_actor::irecv(mailbox_, &data);
+      while ((now < (start_time_ + deadline_)) && now < MAX_SIMULATION_TIME && not comm_receive->test()) {
         // no task was received: make some periodic calls
         if (now >= next_stabilize_date) {
           stabilize();
@@ -154,8 +152,10 @@ public:
       }
 
       if (data != nullptr) {
-        message = static_cast<ChordMessage*>(data);
+        ChordMessage* message = static_cast<ChordMessage*>(data);
         handleMessage(message);
+        comm_receive = nullptr;
+        data         = nullptr;
       }
       now = simgrid::s4u::Engine::getClock();
     }