MPI Functions

int MPI_Keyval_create( MPI_Copy_function *copy_fct,

MPI_Delete_function *delete_fct,

int *key_ptr,

void *extra_arg);

int MPI_Attr_put( MPI_Comm comm,

int key,

void *attr);

int MPI_Attr_get( MPI_Comm comm,

int key,

void *attr_ptr

int *flag);

int MPI_Attr_delete( MPI_Comm comm,

int key);