Re: unique incrementing value with lmdb?

[Howard Chu <hyc@symas.com>]

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.

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  -- Howard Chu
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