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Re: [PATCH] Change svn_fs_root_t to include pointer to related txn

From: Greg Hudson <ghudson_at_MIT.EDU>
Date: 2005-12-13 23:16:01 CET

On Tue, 2005-12-13 at 20:32 +0000, Malcolm Rowe wrote:
> No, because I'd like to create or open the file in the implementations of
> svn_fs_create_txn2() and svn_fs_open_txn(), which create transactions,
> not transaction roots. Sorry if that wasn't clear (I see now that I
> forgot to mention that little point, oops).

Why do you want to do it there?

If the goal is to ensure that multiple roots for a single transaction
use the same file, you may have to cache the file handle in the svn_fs_t
object, since a caller could be using different handles to the same
transaction. If that's not the goal, then I'm not sure what the goal

> I suppose I could attempt to remember whether the transaction was new
> or not, and use that to decide whether to create or open the file as
> necessary (though note that I'm not planning to change the next-ids
> or rev-props files, so they'd still be initialised in _create_txn2()),
> but that all seems very messy, and I'd still need a way to tie back to
> the transaction.

If the messy bit is just "open the file if it's not already open yet",
I'm not sure that justifies a design change like this. If we're going
to change the FS model, I think we want to look into getting rid of
transactions as an object type, not intertwining them better with roots.
(Although that would require revving some APIs.)

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Received on Tue Dec 13 23:24:14 2005

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