MPI_T_CATEGORY_CHANGED(3)			     Open MPI				 MPI_T_CATEGORY_CHANGED(3)

MPI_T_category_changed — Get a timestamp for the categories

SYNTAX
   C Syntax
	  #include <mpi.h>

	  int MPI_T_category_changed(int *stamp)

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

DESCRIPTION
       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.

ERRORS
       MPI_T_category_changed will fail if:

       • MPI_T_ERR_NOT_INITIALIZED: The MPI Tools interface not initialized

Copyright
       2003-2026, The Open MPI Community

						   Mar 05, 2026				 MPI_T_CATEGORY_CHANGED(3)
