friend XBT_PUBLIC void intrusive_ptr_release(Comm * c);
friend XBT_PUBLIC void intrusive_ptr_add_ref(Comm * c);
friend simgrid::s4u::Exec;
friend XBT_PUBLIC void intrusive_ptr_release(Comm * c);
friend XBT_PUBLIC void intrusive_ptr_add_ref(Comm * c);
friend simgrid::s4u::Exec;