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forkserver.cpython-39.opt-1.pyc
a �DOgn/ � @ s� d dl Z d dlZd dlZd dlZd dlZd dlZd dlZd dlZd dlZddl m Z ddl m Z ddl m Z ddl mZ ddl mZ ddl mZ g d �Zd Ze�d �ZG d d � d e�Zddd�Zdd� Zdd� Zdd� Ze� Zej Z ej Z ej Z ej Z dS )� N� )� connection)�process)� reduction)�resource_tracker)�spawn)�util)�ensure_running�get_inherited_fds�connect_to_new_process�set_forkserver_preload� �qc @ sD e Zd Zdd� Zdd� Zdd� Zdd� Zd d � Zd d � Zd d� Z dS )� ForkServerc C s. d | _ d | _d | _d | _t�� | _dg| _d S )N�__main__)�_forkserver_address�_forkserver_alive_fd�_forkserver_pid�_inherited_fds� threading�Lock�_lock�_preload_modules��self� r �2/usr/lib64/python3.9/multiprocessing/forkserver.py�__init__" s zForkServer.__init__c C s2 | j � | �� W d � n1 s$0 Y d S �N)r �_stop_unlockedr r r r �_stop* s zForkServer._stopc C sV | j d u rd S t�| j� d | _t�| j d� d | _ t�| j�sLt�| j� d | _d S )Nr ) r �os�closer �waitpidr � is_abstract_socket_namespacer �unlinkr r r r r / s zForkServer._stop_unlockedc C s& t dd� | jD ��s td��|| _dS )z>Set list of module names to try to load in forkserver process.c s s | ]}t |�tu V qd S r )�type�str)�.0�modr r r � <genexpr>@ � z4ForkServer.set_forkserver_preload.<locals>.<genexpr>z&module_names must be a list of stringsN)�allr � TypeError)r Z modules_namesr r r r > s z!ForkServer.set_forkserver_preloadc C s | j S )z�Return list of fds inherited from parent process. 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 tkr td��t�tj���}|�| j� t� � \}}t� � \}}||| j t � � g}||7 }zvz:t �||� ||fW W t�|� t�|� W d � S t�|� t�|� � Y n0 W t�|� t�|� nt�|� t�|� 0 W d � n1 �s0 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 Zgetfdr �sendfdsr" )r �fds�client�parent_r�child_w�child_r�parent_wZallfdsr r r r L s2 � � � z!ForkServer.connect_to_new_processc s� | j ��� t�� | jdurbt�| jtj�\}}|sDW d � dS t�| j� d| _ d| _d| _d}| j r�ddh� t � d�}� fdd�|� � D �}ni }t�tj���}t�d�}|�|� t�|�s�t�|d � |�� t�� \}}z~zV|�� |g} ||�� || j |f; }t �� } | gt�� } | d |g7 } t�| | | �}W n t�|� � Y n0 W t�|� n t�|� 0 || _ || _|| _W d � n1 �s�0 Y W d � n1 �s�0 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�Z desired_keysr r � <dictcomp>� r+ z-ForkServer.ensure_running.<locals>.<dictcomp>r3 i� z-c) r r r r r! r# �WNOHANGr" r r r r Zget_preparation_data�itemsr2 r3 r �arbitrary_address�bindr r$ �chmod�listenr5 �filenoZget_executable� _args_from_interpreter_flags�spawnv_passfds) r �pid�status�cmd�data�listener�address�alive_rZalive_wZ fds_to_passZexe�argsr rB r r i sN � zForkServer.ensure_runningN) �__name__� __module__� __qualname__r r r r r r r r r r r r s r c C s� |rjd|v r@|dur@dt �� _zt�|� W t �� `n t �� `0 |D ]$}z t|� W qD tyf Y qD0 qDt�� t � � \}}t � |d� t � |d� dd� }t j |t jt ji} dd� | �� D �} t �|� i } tjtj| d ����} t�� ���} | �� t_| �| tj� | �|tj� | �|tj� �zPd d � | �� D �}|�r(�qH�q(||v �rVt �||v �rt � |d � zt � d t j �\}}W n t �y� Y �qY n0 |dk�r��q| �!|d�}|du�r�t �"|�}zt#||� W n t$�y� Y n0 t �%|� nt&�'d| � �ql| |v �rt| �(� d ��<}t)�*|t+d �}t,|�t+k�rXt-d�.t,|����|^}}}|�%� t �/� }|dk�rd}zxz<| �%� | �%� ||||g}|�0| �1� � t2|||| �}W n, t3�y� t4j5t4�6� � t4j7�8� Y n0 W t �9|� n t �9|� 0 nLzt#||� W n t$�y* Y n0 || |< t �%|� |D ]}t �%|� �qBW d � n1 �sj0 Y W n6 t:�y� } z |j;t;j<k�r�� W Y d}~n d}~0 0 �q$W d � n1 �s�0 Y W d � n1 �s�0 Y dS )zRun forkserver.r NTFc W s d S r r )Z_unusedr r r �sigchld_handler� s z main.<locals>.sigchld_handlerc S s i | ]\}}|t � ||��qS r )�signal)r( �sig�valr r r rC � s �zmain.<locals>.<dictcomp>)rJ c S s g | ]\}}|j �qS r )�fileobj)r( �key�eventsr r r � <listcomp>� r+ zmain.<locals>.<listcomp>i ���r z.forkserver: waitpid returned unexpected pid %dr z Too many ({0:n}) fds to send)=r �current_processZ _inheritingr Zimport_main_path� __import__� ImportErrorr � _close_stdinr! r5 � set_blockingrY �SIGCHLD�SIGINT�SIG_IGNrE � set_wakeup_fdr2 r3 � selectors�DefaultSelector� getsockname� _forkserverr �register� EVENT_READ�select� SystemExit�readr# rD �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�errnoZ ECONNABORTED)Z listener_fdrS Zpreloadr= r> �modnameZsig_rZsig_wrX �handlersZ old_handlersZ pid_to_fdrQ �selectorZrfdsrM �stsr: � returncode�sr7 r; �code� unused_fds�fd�er r r �main� s� �� � � �� � 2r� c C sh t �d� |�� D ]\}}t � ||� q|D ]}t�|� q,|^t_tj_ t_ t� | �}t � | |�}|S )Nr` )rY ri rE r! r" rm r r �_resource_trackerZ_fdr �dupr Z_main) r; r7 r� r� rZ r[ r� �parent_sentinelr� r r r r� + s � r� c C sN d}t j}t|�|k r@t�| |t|� �}|s6td��||7 }q t �|�d S )Nr+ zunexpected EOFr )� SIGNED_STRUCT�sizer/ r! rr �EOFError�unpack)r� rP �lengthr� r r r � read_signedB s r� c C s< t �|�}|r8t�| |�}|dkr*td��||d � }q d S )Nr zshould not get here)r� �packr! �writer| )r� �n�msg�nbytesr r r rv L s rv )NN) r� r! rj rY r2 �structr� r rx � r r �contextr r r r �__all__r0 �Structr� �objectr r� r� r� rv rm r r r r r r r r �<module> s: