+int tdb_transaction_cancel_internal(struct tdb_context *tdb)
+{
+ int i;
+
+ if (tdb->transaction == NULL) {
+ TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_cancel: no transaction\n"));
+ return -1;
+ }
+
+ if (tdb->transaction->nesting != 0) {
+ tdb->transaction->transaction_error = 1;
+ tdb->transaction->nesting--;
+ return 0;
+ }
+
+ tdb->map_size = tdb->transaction->old_map_size;
+
+ /* free all the transaction blocks */
+ for (i=0;i<tdb->transaction->num_blocks;i++) {
+ if (tdb->transaction->blocks[i] != NULL) {
+ free(tdb->transaction->blocks[i]);
+ }
+ }
+ SAFE_FREE(tdb->transaction->blocks);
+
+ /* remove any global lock created during the transaction */
+ if (tdb->global_lock.count != 0) {
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 4*tdb->header.hash_size);
+ tdb->global_lock.count = 0;
+ }
+
+ /* remove any locks created during the transaction */
+ if (tdb->num_locks != 0) {
+ for (i=0;i<tdb->num_lockrecs;i++) {
+ tdb_brlock(tdb,FREELIST_TOP+4*tdb->lockrecs[i].list,
+ F_UNLCK,F_SETLKW, 0, 1);
+ }
+ tdb->num_locks = 0;
+ tdb->num_lockrecs = 0;
+ SAFE_FREE(tdb->lockrecs);
+ }
+
+ /* restore the normal io methods */
+ tdb->methods = tdb->transaction->io_methods;
+
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
+ tdb_transaction_unlock(tdb);
+ SAFE_FREE(tdb->transaction->hash_heads);
+ SAFE_FREE(tdb->transaction);
+
+ return 0;
+}