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Editing: pipe.cpython-312.pyc
� 9*�bL � � � d Z ddlZddlZddlmZ ddlmZmZmZ ddl m Z e edd� Z d� Z d � Zd � Z e� Zd � Zd � Z G d � d� Zy)a# pyudev._os.pipe =============== Fallback implementations for pipe. 1. pipe2 from python os module 2. pipe2 from libc 3. pipe from python os module The Pipe class wraps the chosen implementation. .. moduleauthor:: Sebastian Wiesner <lunaryorn@gmail.com> � N)�partial)�ERROR_CHECKERS�FD_PAIR� SIGNATURES)�load_ctypes_library� O_CLOEXECi c �N � t � }| j ||� |d |d fS )z�A ``pipe2`` implementation using ``pipe2`` from ctypes. ``libc`` is a :class:`ctypes.CDLL` object for libc. ``flags`` is an integer providing the flags to ``pipe2``. Return a pair of file descriptors ``(r, w)``. r � )r �pipe2)�libc�flags�fdss �4/usr/lib/python3.12/site-packages/pyudev/_os/pipe.py� _pipe2_ctypesr - s+ � � �)�C��J�J�s�E�� �q�6�3�q�6�>�� c �� � t j � }| t j z dk7 r!|D ] }t |t j � � | t z dk7 r|D ] }t |t � � |S )z�A ``pipe2`` implementation using :func:`os.pipe`. ``flags`` is an integer providing the flags to ``pipe2``. .. warning:: This implementation is not atomic! Return a pair of file descriptors ``(r, w)``. r )�os�pipe� O_NONBLOCK�set_fd_status_flagr � set_fd_flag)r r �file_descriptors r �_pipe2_by_piper ; s^ � � �'�'�)�C� �r�}�}� ��!� "�O� ��� � � >� #� �y��A� � "�O� ��� 3� #� �Jr c �� � t t d� rt j S t dt t � } t | d� rt t | � S t S # t $ r t cY S w xY w)zf Find the appropriate implementation for ``pipe2``. Return a function implementing ``pipe2``.r r ) �hasattrr r r r r r r r � ImportError)r s r �_get_pipe2_implementationr Q sa � � �r�7���x�x�� �"�6�:�~�F��,3�D�'�,B�G�M�4� (� �HV� �� � � � � �s �0A �A �A+�*A+c � � t j | t j d� }t j | t j ||z � y)zwSet a flag on a file descriptor. ``fd`` is the file descriptor or file object, ``flag`` the flag as integer. r N)�fcntl�F_GETFD�F_SETFD��fd�flagr s r r r d �2 � � �K�K��E�M�M�1� -�E� �K�K��E�M�M�5�4�<�0r c � � t j | t j d� }t j | t j ||z � y)z~Set a status flag on a file descriptor. ``fd`` is the file descriptor or file object, ``flag`` the flag as integer. r N)r �F_GETFL�F_SETFLr" s r r r n r% r c �, � e Zd ZdZed� � Zd� Zd� Zy)�Pipez�A unix pipe. A pipe object provides two file objects: :attr:`source` is a readable file object, and :attr:`sink` a writeable. Bytes written to :attr:`sink` appear at :attr:`source`. Open a pipe with :meth:`open()`. c �Z � t t j t z � \ }} | ||� S )zLOpen and return a new :class:`Pipe`. The pipe uses non-blocking IO.)�_PIPE2r r r )�cls�source�sinks r �openz Pipe.open� s( � � �b�m�m�i� 7�8� ����6�4� � r c �t � t j |dd� | _ t j |dd� | _ y)z�Create a new pipe object from the given file descriptors. ``source_fd`` is a file descriptor for the readable side of the pipe, ``sink_fd`` is a file descriptor for the writeable side.�rbr �wbN)r �fdopenr. r/ )�self� source_fd�sink_fds r �__init__z Pipe.__init__� s, � � �i�i� �4��3�� ��I�I�g�t�Q�/�� r c � � | j j � | j j � y# | j j � w xY w)z Closes both sides of the pipe.N)r. �closer/ )r5 s r r: z Pipe.close� s4 � � � �K�K� � � � �I�I�O�O� ��D�I�I�O�O� �s �7 � AN)�__name__� __module__� __qualname__�__doc__� classmethodr0 r8 r: � r r r* r* x s% � �� �!� �!�0� r r* )r> r r � functoolsr �pyudev._ctypeslib.libcr r r �pyudev._ctypeslib.utilsr �getattrr r r r r, r r r* r@ r r �<module>rE s^ ��" � � � � G� F� 7� �B� �Y� /� � � �, � #� $��1�1� � r
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