-static void SIMIX_comm_start(smx_activity_t synchro);
-static simgrid::kernel::activity::CommImpl*
-_find_matching_comm(boost::circular_buffer_space_optimized<smx_activity_t>* deque, e_smx_comm_type_t type,
- int (*match_fun)(void*, void*, smx_activity_t), void* user_data, smx_activity_t my_synchro,
- bool remove_matching);