internal.py 文件源码

def register_signals(_stop_handler):
    """
    Register a callback to gracefully handle the system being externally shut down (terminated)
    :param _stop_handler: A callback that helps the system shut down gracefully.
    """

    if _stop_handler:
        global stop_handler
        stop_handler = _stop_handler
    else:
        raise Exception("No stop handler, probably an internal error, needed for graceful shut down.")
    if os.name == "nt":
        try:
            import win32api
        except ImportError:
            version = ".".join(map(str, sys.version_info[:2]))
            raise Exception("pywin32 not installed for Python " + version)
        else:
            win32api.SetConsoleCtrlHandler(signal_handler_windows, True)
            write_to_log("Registered win32 ctrl handler", _category=EC_SERVICE, _severity=SEV_INFO)
    else:
        signal.signal(signal.SIGINT, signal_handler_unix)
        signal.signal(signal.SIGTERM, signal_handler_unix)
        signal.signal(signal.SIGQUIT, signal_handler_unix)
        signal.signal(signal.SIGHUP, signal_handler_unix)