add an EngineImpl, unused so far

[simgrid.git] / include / simgrid / s4u / engine.hpp

diff --git a/include/simgrid/s4u/engine.hpp b/include/simgrid/s4u/engine.hpp
index dc98207..395ea59 100644 (file)
--- a/include/simgrid/s4u/engine.hpp
+++ b/include/simgrid/s4u/engine.hpp
@@ -18,6 +18,9 @@
 #include <simgrid/s4u/forward.hpp>
 
 namespace simgrid {
+namespace kernel {
+class EngineImpl;
+}
 namespace s4u {
 /** @brief Simulation engine
  *
@@ -86,6 +89,8 @@ public:
     });
   }
 
+  simgrid::kernel::EngineImpl* pimpl;
+
 private:
   static s4u::Engine *instance_;
 };