unique incrementing value with lmdb?
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What is the best way to implement a unique incrementing value (for use as a
key or value) with lmdb?
Is there a property if the transaction mechanism I could piggy-back off of
to atomically generate my number?
Or should I block writers above mdb_cursor_put, do my lmdb transaction, and
unblock?
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CJ Ess wrote:
What is the best way to implement a unique incrementing value (for
use as a
key or value) with lmdb?
Is there a property if the transaction mechanism I could piggy-back off of to
atomically generate my number?
Or should I block writers above mdb_cursor_put, do my lmdb transaction, and
unblock?
You could probably use the txnid for this, but currently there is no API to
return the txnid from a txn.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
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