Associating cached data

Associating Cached Data

• To store data:

   
    mpi_attr_put (comm, keyval, attribute, ierr)

  This caches an attribute referenced by keyval with a communicator.

  To retrieve data:

   
    mpi_attr_get (comm, keyval, attribute,
                  flag, ierr)

  Retrieves the attribute value referenced by keyval. If no attribute is associated with the key then flag is returned as false.

  To delete a cached attribute:

    mpi_attr_delete (comm, keyval, ierr)

  This invokes the delete callback function specified when the key was created.