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    e5d                     @   s   d dl Z d dlZd dlZd dlZd dlZddlmZ ddlmZ ddlm	Z	 dgZ
ejdkrxe
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G d	d deZne
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g7 Z
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 d
eZG dd deZe ZejZdS )    N   )process)	reduction)utilstopZwin32	DupSocketc                   @   s    e Zd ZdZdd Zdd ZdS )r   zPicklable wrapper for a socket.c                    s(   |    fdd}t| j| _d S )Nc                    s     |}| | d S N)shareZ
send_bytes)connpidr	   Znew_sock 7/usr/lib64/python3.8/multiprocessing/resource_sharer.pysend   s    
z DupSocket.__init__.<locals>.send)dup_resource_sharerregisterclose_id)selfZsockr   r   r   r   __init__   s    zDupSocket.__init__c              
   C   s6   t | j }| }t|W  5 Q R  S Q R X dS )z1Get the socket.  This should only be called once.N)r   get_connectionr   Z
recv_bytessocketZ	fromshare)r   r
   r	   r   r   r   detach$   s    zDupSocket.detachN__name__
__module____qualname____doc__r   r   r   r   r   r   r      s   DupFdc                   @   s    e Zd ZdZdd Zdd ZdS )r   z-Wrapper for fd which can be used at any time.c                    s4   t |  fdd} fdd}t||| _d S )Nc                    s   t |  | d S r   )r   Zsend_handle)r
   r   Znew_fdr   r   r   1   s    zDupFd.__init__.<locals>.sendc                      s   t   d S r   )osr   r   r    r   r   r   3   s    zDupFd.__init__.<locals>.close)r!   r   r   r   r   )r   fdr   r   r   r    r   r   /   s    
zDupFd.__init__c              
   C   s.   t | j}t|W  5 Q R  S Q R X dS )z-Get the fd.  This should only be called once.N)r   r   r   r   Zrecv_handle)r   r
   r   r   r   r   7   s    zDupFd.detachNr   r   r   r   r   r   -   s   c                   @   sN   e Zd ZdZdd Zdd Zedd Zdd	d
Zdd Z	dd Z
dd ZdS )_ResourceSharerz.Manager for resources using background thread.c                 C   s@   d| _ i | _g | _t | _d | _d | _d | _t	
| tj d S )Nr   )_key_cache
_old_locks	threadingLock_lock	_listener_address_threadr   Zregister_after_forkr#   
_afterfork)r   r   r   r   r   ?   s    
z_ResourceSharer.__init__c              
   C   sZ   | j J | jdkr|   |  jd7  _||f| j| j< | j| jfW  5 Q R  S Q R X dS )z+Register resource, returning an identifier.Nr   )r)   r+   _startr$   r%   )r   r   r   r   r   r   r   I   s    
z_ResourceSharer.registerc                 C   s<   ddl m} | \}}||t jd}||t f |S )z<Return connection from which to receive identified resource.r   Clientauthkey)
connectionr0   r   current_processr2   r   r!   getpid)Zidentr0   addresskeycr   r   r   r   R   s
    z_ResourceSharer.get_connectionNc              	   C   s   ddl m} | j | jdk	r|| jt jd}|d |  | j	
| | j	 rdtd | j  d| _	d| _d| _| j D ]\}\}}|  q| j  W 5 Q R X dS )z:Stop the background thread and clear registered resources.r   r/   Nr1   z._ResourceSharer thread did not stop when asked)r3   r0   r)   r+   r   r4   r2   r   r   r,   joinZis_aliver   Zsub_warningr*   r%   itemsclear)r   Ztimeoutr0   r8   r7   r   r   r   r   r   r   [   s$    




z_ResourceSharer.stopc                 C   sj   | j  D ]\}\}}|  q
| j   | j| j t | _| jd k	rT| j	  d | _d | _
d | _d S r   )r%   r:   r;   r&   appendr)   r'   r(   r*   r   r+   r,   )r   r7   r   r   r   r   r   r-   p   s    



z_ResourceSharer._afterforkc                 C   sX   ddl m} td |t jd| _| jj| _	t
j| jd}d|_|  || _d S )Nr   )Listenerz0starting listener and thread for sending handlesr1   )targetT)r3   r=   r   debugr   r4   r2   r*   r6   r+   r'   ZThread_serveZdaemonstartr,   )r   r=   tr   r   r   r.   ~   s    

z_ResourceSharer._startc              	   C   s   t tdrttjt  zh| j T}| }|d krHW 5 Q R  W q|\}}| j	|\}}z||| W 5 |  X W 5 Q R X W q   t
 stjt   Y qX qd S )Npthread_sigmask)hasattrsignalrC   	SIG_BLOCKvalid_signalsr*   ZacceptZrecvr%   popr   Z
is_exitingsys
excepthookexc_info)r   r
   msgr7   Zdestination_pidr   r   r   r   r   r@      s    
z_ResourceSharer._serve)N)r   r   r   r   r   r   staticmethodr   r   r-   r.   r@   r   r   r   r   r#   =   s   
	

r#   )r!   rE   r   rI   r'    r   contextr   r   __all__platformobjectr   r   r#   r   r   r   r   r   r   <module>   s    


`