C Syntax

       2003-2025, The Open MPI Community

                                                  Jun 07, 2025                         MPI_T_CATEGORY_CHANGED(3)

       If  two  subsequent  calls to this routine return the same timestamp, it is guaranteed that no categories
       have been changed or added. If the timestamp from the second call is higher  than  some  categories  have
       been added or changed.

MPI_T_category_changed will fail if:

       • MPI_T_ERR_NOT_INITIALIZED: The MPI Tools interface not initialized

       • stamp: A virtual time stamp to indicate the last change to the categories.

CSyntax
          #include <mpi.h>

          int MPI_T_category_changed(int *stamp)