[PATCH v2 1/3] txn: move stmt list/savepoint manipulation out of txn_stmt_new
Vladimir Davydov
vdavydov.dev at gmail.com
Tue Jul 30 13:49:13 MSK 2019
txn_stmt_new is supposed to simply allocate an initialize a new txn_stmt
struct. Adding the new statement to the txn's statement list and setting
up a savepoint for rollback looks confusing. Move it to txn_begin_stmt.
---
src/box/txn.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/src/box/txn.c b/src/box/txn.c
index 05ec6f14..27ae43ac 100644
--- a/src/box/txn.c
+++ b/src/box/txn.c
@@ -84,10 +84,10 @@ txn_add_redo(struct txn *txn, struct txn_stmt *stmt, struct request *request)
/** Initialize a new stmt object within txn. */
static struct txn_stmt *
-txn_stmt_new(struct txn *txn)
+txn_stmt_new(struct region *region)
{
struct txn_stmt *stmt;
- stmt = region_alloc_object(&txn->region, struct txn_stmt);
+ stmt = region_alloc_object(region, struct txn_stmt);
if (stmt == NULL) {
diag_set(OutOfMemory, sizeof(*stmt),
"region", "struct txn_stmt");
@@ -100,12 +100,6 @@ txn_stmt_new(struct txn *txn)
stmt->new_tuple = NULL;
stmt->engine_savepoint = NULL;
stmt->row = NULL;
-
- /* Set the savepoint for statement rollback. */
- txn->sub_stmt_begin[txn->in_sub_stmt] = stailq_last(&txn->stmts);
- txn->in_sub_stmt++;
-
- stailq_add_tail_entry(&txn->stmts, stmt, next);
return stmt;
}
@@ -246,9 +240,15 @@ txn_begin_stmt(struct txn *txn, struct space *space)
diag_set(ClientError, ER_SUB_STMT_MAX);
return -1;
}
- struct txn_stmt *stmt = txn_stmt_new(txn);
+ struct txn_stmt *stmt = txn_stmt_new(&txn->region);
if (stmt == NULL)
return -1;
+
+ /* Set the savepoint for statement rollback. */
+ txn->sub_stmt_begin[txn->in_sub_stmt] = stailq_last(&txn->stmts);
+ txn->in_sub_stmt++;
+ stailq_add_tail_entry(&txn->stmts, stmt, next);
+
if (space == NULL)
return 0;
--
2.20.1
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