Coverage for src/bluetooth_sig/registry/base.py: 100%

1"""Base registry class for Bluetooth SIG registries.""" 

2 

3from __future__ import annotations 

4 

5import threading 

6from typing import Generic, TypeVar 

7 

8T = TypeVar("T") 

9 

10 

11class BaseRegistry(Generic[T]): 

12 """Base class for Bluetooth SIG registries with singleton pattern and thread safety.""" 

13 

14 _instance: BaseRegistry[T] | None = None 

15 _lock = threading.RLock() 

16 

17 def __init__(self) -> None: 

18 """Initialize the registry.""" 

19 self._lock = threading.RLock() 

20 

21 @classmethod 

22 def get_instance(cls) -> BaseRegistry[T]: 

23 """Get the singleton instance of the registry.""" 

24 if cls._instance is None: 

25 with cls._lock: 

26 if cls._instance is None: 

27 cls._instance = cls() 

28 return cls._instance