Function solana_ledger::blockstore::get_slot_meta_entry

fn get_slot_meta_entry<'a>(
    db: &Database,
    slot_meta_working_set: &'a mut HashMap<u64, SlotMetaWorkingSetEntry>,
    slot: Slot,
    parent_slot: Slot
) -> &'a mut SlotMetaWorkingSetEntry

Obtain the SlotMeta from the in-memory slot_meta_working_set or load it from the database if it does not exist in slot_meta_working_set.

In case none of the above has the specified SlotMeta, a new one will be created.

Note that this function will also update the parent slot of the specified slot.

Arguments:

• db: the database
• slot_meta_working_set: a in-memory structure for storing the cached SlotMeta.
• slot: the slot for loading its meta.
• parent_slot: the parent slot to be assigned to the specified slot meta

This function returns the matched SlotMetaWorkingSetEntry. If such entry does not exist in the database, a new entry will be created.