#include "mpi.h"
int MPI_Irecv( void *buf, int count, MPI_Datatype datatype, int source, 
               int tag, MPI_Comm comm, MPI_Request *request )
| buf | initial address of receive buffer (choice) | |
| count | number of elements in receive buffer (integer) | |
| datatype | datatype of each receive buffer element (handle) | |
| source | rank of source (integer) | |
| tag | message tag (integer) | |
| comm | communicator (handle) | 
All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGER in Fortran.
Location:irecv.c