Current File : //lib/python3/dist-packages/dns/__pycache__/asyncbackend.cpython-312.pyc
�
5��e�
� �� � U d dl mZ d dlZd dlmZmZmZmZ da i Z
ee ef e d< dZ
G d� dej j � Zde d efd
�Zd e fd �Zd efd �Zde d efd
�Zy)� )�DictN)�Backend�DatagramSocket�Socket� StreamSocket� _backendsFc � � e Zd Zy)�AsyncLibraryNotFoundErrorN)�__name__�
__module__� __qualname__� � �2/usr/lib/python3/dist-packages/dns/asyncbackend.pyr
r
s � �r r
�name�returnc � � t j | � }|r|S | dk( r ddl}|j j � }n2| dk( r ddl}|j j � }nt d| � �� �|t | < |S )z�Get the specified asynchronous backend.
*name*, a ``str``, the name of the backend. Currently the "trio"
and "asyncio" backends are available.
Raises NotImplementedError if an unknown backend name is specified.
�trior N�asyncioz unimplemented async backend )r �get�dns._trio_backend�
_trio_backendr �dns._asyncio_backend�_asyncio_backend�NotImplementedError)r �backend�dnss r � get_backendr sx � � �m�m�D�!�G���� �v�~� ��#�#�+�+�-��
�� �#��&�&�.�.�0��!�$@���"G�H�H� �I�d�O� �Nr c � � t rt �ddl} | j � S # | j $ r t d� �w xY w# t $ r0 ddl} |j
� Y y# t $ r t d� �w xY ww xY w)z�Attempt to determine the in-use asynchronous I/O library by using
the ``sniffio`` module if it is available.
Returns the name of the library, or raises AsyncLibraryNotFoundError
if the library cannot be determined.
r Nz&sniffio cannot determine async libraryr zno async library detected)� _no_sniffio� ImportError�sniffio�current_async_libraryr
r �get_running_loop� RuntimeError)r" r s r �sniffr& 7 s� � �I� � � �� V��0�0�2� 2���0�0� V�+�,T�U� U� V�� � I�� I� � $� $� &� ��� I�+�,G�H� H� I��
I�s* �A �# �>�A �
A:�A!�!A6�6A:c �@ � t rt S t t � � S )z6Get the default backend, initializing it if necessary.)�_default_backend�set_default_backendr& r r r �get_default_backendr* R s � �� � � �u�w� '�'r c �$ � t | � at S )a, Set the default backend.
It's not normally necessary to call this method, as
``get_default_backend()`` will initialize the backend
appropriately in many cases. If ``sniffio`` is not installed, or
in testing situations, this function allows the backend to be set
explicitly.
)r r( )r s r r) r) Z s � � #�4�(�� �r )�typingr �
dns.exceptionr �dns._asyncbackendr r r r r( r �str�__annotations__r � exception� DNSExceptionr
r r& r* r) r r r �<module>r3 s� �� � �� � � � "� �4��W� � � "� � � ��
�
� :� :� ��c� �g� �4I�s� I�6(�W� (� �c� �g� r
Mini Shell