osx man page for mpi_info_get_nkeys

MPI_Info_get_nkeys(3OpenMPI)											      MPI_Info_get_nkeys(3OpenMPI)

NAME
       MPI_Info_get_nkeys - Gets the number of keys currently defined in an info object.

SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Info_get_nkeys(MPI_Info info, int *nkeys)

Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_INFO_GET_NKEYS(INFO, NKEYS, IERROR)
	    INTEGER	   INFO, NKEYS, IERROR

C++ Syntax
       #include <mpi.h>
       int MPI::Info::Get_nkeys() const

INPUT PARAMETER
       info	 Info object (handle).

OUTPUT PARAMETERS
       nkeys	 Number of defined keys (integer).

       IERROR	 Fortran only: Error status (integer).

DESCRIPTION
       MPI_Info_get_nkeys returns the number of currently defined keys in info.

ERRORS
       Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
       tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception  mechanism
       will be used to throw an MPI:Exception object.

       Before  the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for
       I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN  may	be
       used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

SEE ALSO
       MPI_Info_get
       MPI_Info_get_nthkey
       MPI_Info_get_valueln

Open MPI 1.2							  September 2006				      MPI_Info_get_nkeys(3OpenMPI)