/*D
   MPI_T_source_get_timestamp - Returns a current timestamp from the source identified by the source_index argument

Synopsis:
.vb
int MPI_T_source_get_timestamp(int source_index, MPI_Count *timestamp)
.ve

Input Parameters:
. source_index - index of the source (integer)

Output Parameters:
. timestamp - current timestamp from specified source (integer)

.N ThreadSafe

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

D*/

