MPI_Info_get_nthkey(3)             Open MPI             MPI_Info_get_nthkey(3)



NAME
       MPI_Info_get_nthkey - Returns the nth defined key in info.


SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Info_get_nthkey(MPI_Info info, int n, char *key)


Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_INFO_GET_NTHKEY(INFO, N, KEY, IERROR)
            INTEGER        INFO, N, IERROR
            CHARACTER*(*)  KEY


C++ Syntax
       #include <mpi.h>
       void MPI::Info::Get_nthkey(int n, char* key) const


INPUT PARAMETERS
       info      Info object (handle).

       n         Key number (integer).


OUTPUT PARAMETERS
       key       Key (string).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPI_Info_get_nthkey returns the nth defined key in info. Keys are
       numbered 0...N - 1 where N is the value returned by MPI_Info_get_nkeys.
       All keys between 0 and N - 1 are guaranteed to be defined. The number
       of a given key does not change as long as info is not modified with
       MPI_Info_set or MPI_Info_delete.


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++
       functions 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_nkeys
       MPI_Info_get_valueln




1.4.1                            Jan 14, 2010           MPI_Info_get_nthkey(3)
