491     #define MPI_Irecv(buf, count, datatype, source, tag, comm, request) \  argument
494     #define MPI_Irecv_c(buf, count, datatype, source, tag, comm, request) \  argument
497     #define MPI_Isend(buf, count, datatype, dest, tag, comm, request) \  argument
500     #define MPI_Isend_c(buf, count, datatype, dest, tag, comm, request) \  argument
511     #define MPI_Recv(buf, count, datatype, source, tag, comm, status) \  argument
514     #define MPI_Recv_c(buf, count, datatype, source, tag, comm, status) \  argument
517     #define MPI_Send(buf, count, datatype, dest, tag, comm) \  argument
520     #define MPI_Send_c(buf, count, datatype, dest, tag, comm) \  argument
585     #define MPIX_Send_enqueue(buf, count, datatype, dest, tag, comm) \  argument
588     #define MPIX_Recv_enqueue(buf, count, datatype, source, tag, comm, status) \  argument
591     #define MPIX_Isend_enqueue(buf, count, datatype, dest, tag, comm, request) \  argument
594     #define MPIX_Irecv_enqueue(buf, count, datatype, source, tag, comm, request) \  argument