From: Fred Suter <suterf@ornl.gov>
Date: Wed, 31 May 2023 14:10:41 +0000 (-0400)
Subject: improve comment
X-Git-Tag: v3.34~88
X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/d6e83c7257e124027f010d09aa196077888219ef

improve comment
---

diff --git a/include/simgrid/s4u/Comm.hpp b/include/simgrid/s4u/Comm.hpp
index 2577c88845..3091cdd7f5 100644
--- a/include/simgrid/s4u/Comm.hpp
+++ b/include/simgrid/s4u/Comm.hpp
@@ -44,7 +44,11 @@ protected:
   static xbt::signal<void(Comm const&)> on_recv;
   static xbt::signal<void(Comm const&)> on_start;
 
-  void fire_on_completion() const override { /* Do nothing */ }
+  void fire_on_completion() const override {
+    /* The completion signal of a Comm has to be thrown only once and not by the sender AND the receiver.
+       then Comm::on_completion is thrown in the kernel in CommImpl::finish.
+     */
+  }
   void fire_on_veto() const override { on_veto(const_cast<Comm&>(*this)); }
   void fire_on_suspend() const override { on_suspend(*this); }
   void fire_on_resume() const override { on_resume(*this); }