/*D
   MPI_T_event_handle_alloc - Creates a registration handle for the event type identified by event_index

Synopsis:
.vb
int MPI_T_event_handle_alloc(int event_index, void *obj_handle, MPI_Info info,
                             MPI_T_event_registration *event_registration)
.ve

Input Parameters:
+ event_index - index of event type for which the registration handle is to be allocated (integer)
. obj_handle - reference to a handle of the mpi object to which this event is supposed to be bound (pointer)
- info - info object (handle)

Output Parameters:
. event_registration - event registration (handle)

.N ThreadSafe

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_INFO
.N MPI_T_ERR_INVALID
.N MPI_T_ERR_INVALID_INDEX
.N MPI_T_ERR_NOT_INITIALIZED
.N MPI_ERR_OTHER

D*/

