Function atomic_json_read

scripts/file_lock.py:63–76

持锁读取 JSON 文件。

(path: pathlib.Path, default: Any = None)

def atomic_json_read(path: pathlib.Path, default: Any = None) -> Any:
    """持锁读取 JSON 文件。"""
    lock_file = _lock_path(path)
    lock_file.parent.mkdir(parents=True, exist_ok=True)
    fd = os.open(str(lock_file), os.O_CREAT | os.O_RDWR)
    try:
        _lock_shared(fd)
        try:
            return json.loads(path.read_text(encoding='utf-8')) if path.exists() else default
        except Exception:
            return default
    finally:
        _unlock(fd)
        os.close(fd)


def atomic_json_update(