hh

API/folder.py

@@ -202,6 +202,8 @@ class API_folder_store:
 
     DB_NAME = "medios-macina.db"
     SCHEMA_VERSION = 4
+    # Global lock across all instances to prevent 'database is locked' during concurrent operations.
+    _shared_db_lock = RLock()
 
     def __init__(self, library_root: Path):
         """Initialize the database at the library root.
@@ -212,10 +214,8 @@ class API_folder_store:
         self.library_root = expand_path(library_root).resolve()
         self.db_path = self.library_root / self.DB_NAME
         self.connection: Optional[sqlite3.Connection] = None
-        # sqlite3 connections are not safe for concurrent use across threads.
-        # We intentionally keep a single connection per API_folder_store instance,
-        # so we must serialize all DB operations on that connection.
-        self._db_lock = RLock()
+        # Use the shared lock
+        self._db_lock = self._shared_db_lock
         self._init_db()
 
     def _normalize_input_path(self, file_path: Path) -> Path: