MPI_Info_get_nkeys

Returns the number of currently defined keys in info

Synopsis

#include "mpi.h"
int MPI_Info_get_nkeys(MPI_Info info, int *nkeys)

Input Parameters

info: info object (handle)

Output Parameters

nkeys: number of defined keys (integer)

Notes for Fortran

All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK) havean additional argument ierr at the end of the argument list. ierris an integer and has the same meaning as the return value of the routinein C. In Fortran, MPI routines are subroutines, and are invoked with thecall statement.

All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGERin Fortran.

Location:info_getnks.c