U
    .e                     @   sv   d dl Z d dlZddlmZ ddlmZ ddlmZ ddlmZ ddlmZ dgZG d	d
 d
Z	G dd dej
Z
dS )    N   )	reduction)context)
forkserver)
popen_fork)spawnPopenc                   @   s   e Zd Zdd Zdd ZdS )_DupFdc                 C   s
   || _ d S N)ind)selfr    r   =/tmp/pip-unpacked-wheel-39f38r4u/billiard/popen_forkserver.py__init__   s    z_DupFd.__init__c                 C   s   t  | j S r
   )r   Zget_inherited_fdsr   )r   r   r   r   detach   s    z_DupFd.detachN)__name__
__module____qualname__r   r   r   r   r   r   r	      s   r	   c                       sB   e Zd ZdZeZ fddZdd Zdd Ze	j
fdd	Z  ZS )
r   r   c                    s   g | _ t | d S r
   )_fdssuperr   )r   process_obj	__class__r   r   r   "   s    zPopen.__init__c                 C   s   | j | t| j d S )Nr   )r   appendlen)r   fdr   r   r   duplicate_for_child&   s    zPopen.duplicate_for_childc              	   C   s   t |j}t }t|  zt|| t|| W 5 td  X t	
| j\| _}tj|ddd}||  W 5 Q R X t	| j| _d S )NwbT)closefd)r   Zget_preparation_data_nameioBytesIOr   Zset_spawning_popenr   dumpr   Zconnect_to_new_processr   sentinelopenwrite	getbufferread_unsignedpid)r   r   Z	prep_databufwfr   r   r   _launch*   s    
zPopen._launchc              	   C   sr   | j d krlddlm} |tjkr$dnd }|| jg|s:d S zt| j| _ W n tt	fk
rj   d| _ Y nX | j S )Nr   )waitr      )

returncode
connectionr-   osWNOHANGr#   r   r'   OSErrorEOFError)r   flagr-   timeoutr   r   r   poll9   s    
z
Popen.poll)r   r   r   methodr	   ZDupFdr   r   r,   r1   r2   r7   __classcell__r   r   r   r   r      s   )r    r1    r   r   r   r   r   __all__r	   r   r   r   r   r   <module>   s   