gpg: Provide an interface to patch TOFU updates.

* g10/tofu.c (struct db): Rename begin_transaction to savepoint_batch.
Rename end_transaction to savepoint_batch_commit.  Update users.
Remove field rollback.  Add fields savepoint_inner and
savepoint_inner_commit.  Add field batch_update.
(dump_cache): New function.
(batch_update): New variable.
(begin_transaction). New function.
(end_transaction): New function.
(rollback_transaction): New function.
(tofu_begin_batch_update): New function.
(tofu_end_batch_update): New function.
(closedb): End any pending batch transaction.
(closedbs): Assert that none of the DBs have a started batch
transaction if we not in batch mode.
(record_binding): Use the begin_transaction, end_transaction and
rollback_transaction functions instead of including the SQL inline.
Also start a batch mode transaction if we are using the flat format.
(tofu_register): Use the begin_transaction, end_transaction and
rollback_transaction functions instead of including the SQL inline.
* g10/gpgv.c (tofu_begin_batch_update): New function.
(tofu_end_batch_update): New function.
* g10/test-stubs.c (tofu_begin_batch_update): New function.
(tofu_end_batch_update): New function.

--
Signed-off-by: Neal H. Walfield <neal@g10code.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/g10/tofu.h b/g10/tofu.h
index adf87abe6..2d23e86bc 100644
--- a/g10/tofu.h
+++ b/g10/tofu.h
@@ -106,4 +106,10 @@ gpg_error_t tofu_set_policy_by_keyid (u32 *keyid, enum tofu_policy policy);
 gpg_error_t tofu_get_policy (PKT_public_key *pk, PKT_user_id *user_id,
 			     enum tofu_policy *policy);
 
+/* When doing a lot of DB activities (in particular, when listing
+   keys), this causes the DB to enter batch mode, which can
+   significantly speed up operations.  */
+void tofu_begin_batch_update (void);
+void tofu_end_batch_update (void);
+
 #endif /*G10_TOFU_H*/