void* SIMIX_comm_get_src_buff(smx_action_t action);
void* SIMIX_comm_get_dst_buff(smx_action_t action);
size_t SIMIX_comm_get_src_buff_size(smx_action_t action);
void* SIMIX_comm_get_src_buff(smx_action_t action);
void* SIMIX_comm_get_dst_buff(smx_action_t action);
size_t SIMIX_comm_get_src_buff_size(smx_action_t action);