/*D
   MPI_Session_get_num_psets - Get number of available processes sets

Synopsis:
.vb
int MPI_Session_get_num_psets(MPI_Session session, MPI_Info info,
                              int *npset_names)
.ve

Input Parameters:
+ session - session (handle)
- info - info object (handle)

Output Parameters:
. npset_names - number of available process sets (non-negative integer)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_INFO
.N MPI_ERR_SESSION
.N MPI_ERR_OTHER

D*/

