PK_ERROR_code_t     PK_PARTITION_ask_pmark
(
--- received arguments ---
PK_PARTITION_t      partition,      --- partition

--- returned arguments ---
PK_PMARK_t   *const pmark,          --- current pmark
PK_LOGICAL_t *const is_at_pmark     --- whether partition is at this pmark
)


This function returns the current pmark of the given partition, i.e. the
pmark most recently set or rolled to. It also returns whether the partition
is at that pmark, or has been modified since the pmark was set or rolled to.


Specific Errors:
    PK_ERROR_rollback_not_started  Partitioned rollback is not active


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