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a _�hO � @ s� d dl Z d dlZd dlmZ d dlmZ d dlmZ d dlm Z m Z d dlZejrnd dlm Z mZmZmZmZ G dd� de �ZdS ) � N)�Future)�gen)�IOLoop)�Resolver�is_valid_ip)� Generator�Any�List�Tuple�Dictc @ s` e Zd ZdZdd�dd�Zeeedd�dd�Zeedd �d d�Ze j deeed d�dd��ZdS )� CaresResolvera` Name resolver based on the c-ares library. This is a non-blocking and non-threaded resolver. It may not produce the same results as the system resolver, but can be used for non-blocking resolution when threads cannot be used. c-ares fails to resolve some names when ``family`` is ``AF_UNSPEC``, so it is only recommended for use in ``AF_INET`` (i.e. IPv4). This is the default for ``tornado.simple_httpclient``, but other libraries may default to ``AF_UNSPEC``. .. versionchanged:: 5.0 The ``io_loop`` argument (deprecated since version 4.1) has been removed. N)�returnc C s$ t �� | _tj| jd�| _i | _d S )N)Z sock_state_cb)r �current�io_loop�pycaresZChannel�_sock_state_cb�channel�fds)�self� r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/tornado/platform/caresresolver.py� initialize s zCaresResolver.initialize)�fd�readable�writabler c C sz |r t jnd|rt jndB }|s6| j�|� | j|= n@|| jv rZ| j�||� || j|<