Set shared variable *before* mutex unlock.

diff --git a/src/s4u/s4u_Barrier.cpp b/src/s4u/s4u_Barrier.cpp
index e4a8214..f1e449b 100644 (file)
--- a/src/s4u/s4u_Barrier.cpp
+++ b/src/s4u/s4u_Barrier.cpp
@@ -39,8 +39,8 @@ int Barrier::wait()
   XBT_DEBUG("waiting %p %u/%u", this, arrived_actors_, expected_actors_);
   if (arrived_actors_ == expected_actors_) {
     cond_->notify_all();
-    mutex_->unlock();
     arrived_actors_ = 0;
+    mutex_->unlock();
     return SG_BARRIER_SERIAL_THREAD;
   }