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-rw-r--r--lib/tdb/docs/README8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/tdb/docs/README b/lib/tdb/docs/README
index 63fcf5e049..454e4ba032 100644
--- a/lib/tdb/docs/README
+++ b/lib/tdb/docs/README
@@ -236,3 +236,11 @@ int tdb_transaction_commit(TDB_CONTEXT *tdb)
commit a current transaction, updating the database and releasing
the transaction locks.
+----------------------------------------------------------------------
+int tdb_transaction_prepare_commit(TDB_CONTEXT *tdb)
+
+ prepare to commit a current transaction, for two-phase commits.
+ Once prepared for commit, the only allowed calls are
+ tdb_transaction_commit() or tdb_transaction_cancel(). Preparing
+ allocates disk space for the pending updates, so a subsequent
+ commit should succeed (barring any hardware failures).