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forkserver.cpython-310.pyc
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This returns None if the current process was not started by fork server. )r r r r r r D s z ForkServer.get_inherited_fdsc C s� | � � t|�d tkrtd��t�tj��X}|�| j� t� � \}}t� � \}}||| j t � � g}||7 }z,z t �||� ||fW W t�|� t�|� W d � S t�|� t�|� � t�|� t�|� w 1 sqw Y dS )a; Request forkserver to create a child process. Returns a pair of fds (status_r, data_w). The calling process can read the child process's pid and (eventually) its returncode from status_r. The calling process should write to data_w the pickled preparation and process data. � z too many fdsN)r �len�MAXFDS_TO_SEND� ValueError�socket�AF_UNIX�connectr r! �piper r �getfdr �sendfdsr" )r �fds�client�parent_r�child_w�child_r�parent_w�allfdsr r r r L s0 � � �z!ForkServer.connect_to_new_processc s� | j �� t�� | jdur1t�| jtj�\}}|s" W d � dS t�| j� d| _ d| _d| _d}| j rKddh� t � d�}� fdd�|� � D �}ni }t�tj��s}t�d�}|�|� t�|�sit�|d � |�� t�� \}}z<z+|�� |g} ||�� || j |f; }t �� } | gt�� } | d |g7 } t�| | | �}W n t�|� � W t�|� nt�|� w || _ || _|| _W d � n1 s�w Y W d � dS W d � dS 1 s�w Y dS ) z�Make sure that a fork server is running. This can be called from any process. Note that usually a child process will just reuse the forkserver started by its parent, so ensure_running() will do nothing. NzCfrom multiprocessing.forkserver import main; main(%d, %d, %r, **%r)� main_path�sys_path�ignorec s i | ] \}}|� v r||�qS r r )r( �x�y�� desired_keysr r � <dictcomp>� s z-ForkServer.ensure_running.<locals>.<dictcomp>r3 i� z-c) r r r r r! r# �WNOHANGr" r r r r �get_preparation_data�itemsr2 r3 r �arbitrary_address�bindr r$ �chmod�listenr5 �fileno�get_executable� _args_from_interpreter_flags�spawnv_passfds) r �pid�status�cmd�data�listener�address�alive_r�alive_w� fds_to_pass�exe�argsr rD r r i sZ � � � ��"�zForkServer.ensure_runningN) �__name__� __module__� __qualname__r r r r r r r r r r r r s r c C s� |r4d|v r |dur dt �� _z t�|� W t �� `nt �� `w |D ]}zt|� W q" ty3 Y q"w t�� t � � \}}t � |d� t � |d� dd� }t j |t jt ji} dd� | �� D �} t �|� i } tjtj| d ���y} t�� ��b} | �� t_| �| tj� | �|tj� | �|tj� �z( d d � | �� D �}|r�nq�||v r�t � |d �d ks�J d��t �||v �r t � |d� z t � dt j �\}}W n t y� Y n5w |dkr�n/| �!|d�}|du�rt �"|�}zt#||� W n t$y� Y nw t �%|� nt&�'d| � q�| |v �r�| �(� d ��}t)�*|t+d �}t,|�t+k�r-t-d�.t,|����|^}}}|�%� t �/� }|dk�r�d }z<z | �%� | �%� ||||g}|�0| �1� � t2|||| �}W n t3�yv t4j5t4�6� � t4j7�8� Y nw W t �9|� n,t �9|� w zt#||� W n t$�y� Y nw || |< t �%|� |D ]}t �%|� �q�W d � n 1 �s�w Y W n t:�y� } z|j;t;j<k�r̂ W Y d}~nd}~ww q�1 �s�w Y W d � dS 1 �s�w Y dS )zRun forkserver.r NTFc W s d S r r )�_unusedr r r �sigchld_handler� s z main.<locals>.sigchld_handlerc S s i | ] \}}|t � ||��qS r )�signal)r( �sig�valr r r rF � s �zmain.<locals>.<dictcomp>)rN c S s g | ]\}}|j �qS r )�fileobj)r( �key�eventsr r r � <listcomp>� s zmain.<locals>.<listcomp>r � z Not at EOF?i ���r z.forkserver: waitpid returned unexpected pid %dz Too many ({0:n}) fds to send)=r �current_process� _inheritingr �import_main_path� __import__� ImportErrorr � _close_stdinr! r5 � set_blockingrb �SIGCHLD�SIGINT�SIG_IGNrI � set_wakeup_fdr2 r3 � selectors�DefaultSelector� getsockname� _forkserverr �register� EVENT_READ�select�read� SystemExitr# rG �ChildProcessError�pop�waitstatus_to_exitcode� write_signed�BrokenPipeErrorr" �warnings�warn�acceptr �recvfdsr0 r/ � RuntimeError�format�fork�extend�values� _serve_one� Exception�sys� excepthook�exc_info�stderr�flush�_exit�OSError�errno� ECONNABORTED)� listener_fdrX �preloadr? r@ �modname�sig_r�sig_wra �handlers� old_handlers� pid_to_fdrV �selector�rfdsrR �stsr; � returncode�sr8 r< �code� unused_fds�fd�er r r �main� s� � �� � � � � �� �� ���� � ��& ����8�r� c C sh t �d� |�� D ] \}}t � ||� q |D ]}t�|� q|^t_tj_ t_ t� | �}t � | |�}|S )Nrj )rb ru rI r! r" ry r r �_resource_tracker�_fdr �dupr �_main) r< r8 r� r� rc rd r� �parent_sentinelr� r r r r� + s � r� c C sX d}t j}t|�|k r%t�| |t|� �}|std��||7 }t|�|k s t �|�d S )Nri zunexpected EOFr )� SIGNED_STRUCT�sizer/ r! r} �EOFError�unpack)r� rU �lengthr� r r r � read_signedB s �r� c C sB t �|�}|r t�| |�}|dkrtd��||d � }|sd S d S )Nr zshould not get here)r� �packr! �writer� )r� �n�msg�nbytesr r r r� L s �r� )NN) r� r! rv rb r2 �structr� r r� � r r �contextr r r r �__all__r0 �Structr� �objectr r� r� r� r� ry r r r r r r r r �<module> s<
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