[doc] rtd: link to example s4u-barrier

diff --git a/examples/s4u/README.rst b/examples/s4u/README.rst
index d8e2522..0b7201b 100644 (file)
--- a/examples/s4u/README.rst
+++ b/examples/s4u/README.rst
@@ -211,6 +211,10 @@ Classical synchronization objects
    Shows how to use simgrid::s4u::Mutex synchronization objects.
    |br| `examples/s4u/mutex/s4u-mutex.cpp <https://framagit.org/simgrid/simgrid/tree/master/examples/s4u/mutex/s4u-mutex.cpp>`_
 
+ - **Barrier:**
+   Shows how to use simgrid::s4u::Barrier synchronization objects.
+   |br| `examples/s4u/barrier/s4u-barrier.cpp <https://framagit.org/simgrid/simgrid/tree/master/examples/s4u/barrier/s4u-barrier.cpp>`_
+
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 Interacting with the platform
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