+XBT_PUBLIC(void *) SIMIX_communication_get_src_buf(smx_comm_t comm);
+XBT_PUBLIC(void *) SIMIX_communication_get_dst_buf(smx_comm_t comm);
+XBT_PUBLIC(size_t) SIMIX_communication_get_src_buf_size(smx_comm_t comm);
+XBT_PUBLIC(size_t) SIMIX_communication_get_dst_buf_size(smx_comm_t comm);
+