s3:dbwrap: export logic of dbwrap_change_uint32_atomic into an action function

to prepare for adding a transaction wrapper to dbwrap_change_uint32_atomic()

Michael

diff --git a/source3/lib/dbwrap_util.c b/source3/lib/dbwrap_util.c
index fe3060c89ac86ae9ea8d65ad59053eefec829199..118d681eb9620ab4eaab028d1b2f0c2bd2279734 100644 (file)
--- a/source3/lib/dbwrap_util.c
+++ b/source3/lib/dbwrap_util.c
@@ -106,30 +106,40 @@ int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
  * return old value in *oldval.
  * store *oldval + change_val to db.
  */
-NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
-                                    uint32_t *oldval, uint32_t change_val)
+
+struct dbwrap_change_uint32_atomic_context {
+       const char *keystr;
+       uint32_t *oldval;
+       uint32_t change_val;
+};
+
+static NTSTATUS dbwrap_change_uint32_atomic_action(struct db_context *db,
+                                                  void *private_data)
 {
        struct db_record *rec;
        uint32 val = -1;
        TDB_DATA data;
        NTSTATUS ret;
+       struct dbwrap_change_uint32_atomic_context *state;
 
-       rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
+       state = (struct dbwrap_change_uint32_atomic_context *)private_data;
+
+       rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
        if (!rec) {
                return NT_STATUS_UNSUCCESSFUL;
        }
 
        if (rec->value.dptr == NULL) {
-               val = *oldval;
+               val = *(state->oldval);
        } else if (rec->value.dsize == sizeof(val)) {
                val = IVAL(rec->value.dptr, 0);
-               *oldval = val;
+               *(state->oldval) = val;
        } else {
                ret = NT_STATUS_UNSUCCESSFUL;
                goto done;
        }
 
-       val += change_val;
+       val += state->change_val;
 
        data.dsize = sizeof(val);
        data.dptr = (uint8 *)&val;
@@ -141,6 +151,21 @@ done:
        return ret;
 }
 
+NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
+                                    uint32_t *oldval, uint32_t change_val)
+{
+       NTSTATUS ret;
+       struct dbwrap_change_uint32_atomic_context state;
+
+       state.keystr = keystr;
+       state.oldval = oldval;
+       state.change_val = change_val;
+
+       ret = dbwrap_change_uint32_atomic_action(db, &state);
+
+       return ret;
+}
+
 /**
  * Atomic integer change (addition):
  *