MPI_T_CATEGORY_GET_CATEGORIES(3)		     Open MPI			  MPI_T_CATEGORY_GET_CATEGORIES(3)

MPI_T_category_get_categories — Query which categories are in a category

SYNTAX
   C Syntax
	  #include <mpi.h>

	  int MPI_T_category_get_categories(int cat_index, int len, int indices[])

INPUT PARAMETERS
       • cat_index: Index of the category to be queried.

       • len: The length of the indices array.

OUTPUT PARAMETERS
       • indices: An integer array of size len, indicating category indices.

DESCRIPTION
       MPI_T_category_get_categories can be used to query which other categories are in a category.

ERRORS
       MPI_T_category_get_categories will fail if:

       • MPI_T_ERR_NOT_INITIALIZED: The MPI Tools interface not initialized

       • MPI_T_ERR_INVALID_INDEX: The category index is invalid

Copyright
       2003-2026, The Open MPI Community

						   Mar 05, 2026			  MPI_T_CATEGORY_GET_CATEGORIES(3)
