XBT_PUBLIC(void *) SIMIX_req_comm_get_src_buff(smx_action_t comm);
XBT_PUBLIC(void *) SIMIX_req_comm_get_dst_buff(smx_action_t comm);
XBT_PUBLIC(size_t) SIMIX_req_comm_get_src_buff_size(smx_action_t comm);
XBT_PUBLIC(void *) SIMIX_req_comm_get_src_buff(smx_action_t comm);
XBT_PUBLIC(void *) SIMIX_req_comm_get_dst_buff(smx_action_t comm);
XBT_PUBLIC(size_t) SIMIX_req_comm_get_src_buff_size(smx_action_t comm);