def release(table: Table, _id: str) -> bool:
"""
Releases lock on object. Returns False if the object does not exist or is already released.
"""
if table.update({"_id": _id, "_mutex": False}, ["_id"]):
return True
return False
def lock(table: Table, id: str, attempt=0, max_attempts=0) -> bool:
"""
Attempts to acquire lock on object
"""
if table.update({"_id": id, "_mutex": True}, ["_id"]):
return True
if attempt < max_attempts:
return _BaseOperations.lock(table, id, attempt + 1, max_attempts)
else:
return False
def update(table: Table, data: dict) -> bool:
if data.get("id") is not None:
data["_id"] = data["id"]
del data["id"]
return table.update(data)