MPIInfogetnkeys(3OpenMPI) MPIInfogetnkeys(3OpenMPI)

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


SSYYNNTTAAXX
CC SSyynnttaaxx
       #include 
       int MPIInfogetnkeys(MPIInfo info, int *nkeys)


FFoorrttrraann SSyynnttaaxx
       INCLUDE 'mpif.h'
       MPIINFOGETNKEYS(INFO, NKEYS, IERROR)
            INTEGER        INFO, NKEYS, IERROR


CC++++ SSyynnttaaxx
       #include 
       int MPI::Info::Getnkeys() const


IINNPPUUTT PPAARRAAMMEETTEERR
       info      Info object (handle).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       nkeys     Number of defined keys (integer).

       IERROR    Fortran only: Error status (integer).


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


EERRRROORRSS
       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::ERRORSTHROWEXCEPTIONS, 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
       MPICommseterrhandler; the predefined error handler MPIERRORSRETURN
       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
       MPIInfoget
       MPIInfogetnthkey
       MPIInfogetvalueln




Open MPI 1.2                    September 2006    MPIInfogetnkeys(3OpenMPI)