/*D
   MPI_T_event_callback_get_info - Returns a new info object containing the hints of the callback function registered for the callback safety level specified by cb_safety of the event-registration handle associated with event_registration.

Synopsis:
.vb
int MPI_T_event_callback_get_info(MPI_T_event_registration event_registration,
                                  MPI_T_cb_safety cb_safety,
                                  MPI_Info *info_used)
.ve

Input Parameters:
+ event_registration - event registration (handle)
- cb_safety - callback safety level (integer)

Output Parameters:
. info_used - info object (handle)

.N ThreadSafe

.N Errors
.N MPI_SUCCESS
.N MPI_T_ERR_INVALID
.N MPI_T_ERR_INVALID_HANDLE
.N MPI_T_ERR_NOT_INITIALIZED
.N MPI_ERR_OTHER

D*/

