PK_ERROR_code_t  PK_MARK_ask_preceding
(
--- received arguments ---
PK_MARK_t        mark,     --- a mark

--- returned arguments ---
PK_MARK_t *const preceding     --- its preceding mark
)


This function returns the mark preceding the given one. If the given mark is
the first mark, PK_MARK_null is returned.


Specific Errors:
    PK_ERROR_mark_not_started      Partitioned rollback is not active


This function should only be called when partitioned rollback has been
started with PK_DELTA_register_callbacks.