a
    ze+                     @   s  d dl Z d dlZd dlZddlmZ ddlmZ dZG dd deZG dd	 d	eZ	G d
d deZ
G dd deZG dd deZG dd dejZG dd deZejdkrRG dd dejZG dd dejZG dd dejZG dd deZG dd deZG dd  d eZe e e d!Zejd"krDeed# Zneed$ Zn8G d%d dejZG d&d deZd#e iZeed# Zd'd( Ze Zd)d* Zd+d, Zd-d. ZdS )/    N   )process)	reduction c                   @   s   e Zd ZdS )ProcessErrorN__name__
__module____qualname__r   r   r   -/usr/lib/python3.9/multiprocessing/context.pyr      s   r   c                   @   s   e Zd ZdS )BufferTooShortNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZdS )TimeoutErrorNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZdS )AuthenticationErrorNr   r   r   r   r   r      s   r   c                   @   sX  e Zd ZeZeZeZeZeej	Z	eej
Z
eejZdd Zdd ZdCddZdd	 Zd
d ZdDddZdEddZdFddZdd ZdGddZdHddZdIddZdd ZdJd d!Zd"d# Zd$d% Zdd&d'd(Zdd&d)d*Zd+d, Zd-d. ZdKd/d0Z d1d2 Z!d3d4 Z"d5d6 Z#dLd7d8Z$dMd:d;Z%dNd<d=Z&e'd>d? Z(e(j)d@d? Z(dAdB Z*dS )OBaseContextc                 C   s"   t  }|du rtdn|S dS )z(Returns the number of CPUs in the systemNzcannot determine number of cpus)os	cpu_countNotImplementedError)selfnumr   r   r   r   )   s    
zBaseContext.cpu_countc                 C   s&   ddl m} ||  d}|  |S )zReturns a manager associated with a running server process

        The managers methods such as `Lock()`, `Condition()` and `Queue()`
        can be used to create shared objects.
        r   )SyncManagerctx)managersr   get_contextstart)r   r   mr   r   r   Manager1   s    zBaseContext.ManagerTc                 C   s   ddl m} ||S )z1Returns two connection object connected by a piper   )Pipe)
connectionr   )r   duplexr   r   r   r   r   <   s    zBaseContext.Pipec                 C   s   ddl m} ||  dS )z#Returns a non-recursive lock objectr   )Lockr   )synchronizer    r   )r   r    r   r   r   r    A   s    zBaseContext.Lockc                 C   s   ddl m} ||  dS )zReturns a recursive lock objectr   )RLockr   )r!   r"   r   )r   r"   r   r   r   r"   F   s    zBaseContext.RLockNc                 C   s   ddl m} |||  dS )zReturns a condition objectr   )	Conditionr   )r!   r#   r   )r   lockr#   r   r   r   r#   K   s    zBaseContext.Conditionr   c                 C   s   ddl m} |||  dS )zReturns a semaphore objectr   )	Semaphorer   )r!   r%   r   )r   valuer%   r   r   r   r%   P   s    zBaseContext.Semaphorec                 C   s   ddl m} |||  dS )z"Returns a bounded semaphore objectr   )BoundedSemaphorer   )r!   r'   r   )r   r&   r'   r   r   r   r'   U   s    zBaseContext.BoundedSemaphorec                 C   s   ddl m} ||  dS )zReturns an event objectr   )Eventr   )r!   r(   r   )r   r(   r   r   r   r(   Z   s    zBaseContext.Eventc                 C   s    ddl m} |||||  dS )zReturns a barrier objectr   )Barrierr   )r!   r)   r   )r   partiesactiontimeoutr)   r   r   r   r)   _   s    zBaseContext.Barrierr   c                 C   s   ddl m} |||  dS )Returns a queue objectr   )Queuer   )queuesr.   r   )r   maxsizer.   r   r   r   r.   d   s    zBaseContext.Queuec                 C   s   ddl m} |||  dS )r-   r   )JoinableQueuer   )r/   r1   r   )r   r0   r1   r   r   r   r1   i   s    zBaseContext.JoinableQueuec                 C   s   ddl m} ||  dS )r-   r   )SimpleQueuer   )r/   r2   r   )r   r2   r   r   r   r2   n   s    zBaseContext.SimpleQueuer   c                 C   s"   ddl m} ||||||  dS )zReturns a process pool objectr   )Pool)context)poolr3   r   )r   	processesinitializerinitargsmaxtasksperchildr3   r   r   r   r3   s   s    
zBaseContext.Poolc                 G   s   ddl m} ||g|R  S )zReturns a shared objectr   )RawValue)sharedctypesr:   )r   typecode_or_typeargsr:   r   r   r   r:   z   s    zBaseContext.RawValuec                 C   s   ddl m} |||S )zReturns a shared arrayr   )RawArray)r;   r>   )r   r<   size_or_initializerr>   r   r   r   r>      s    zBaseContext.RawArray)r$   c                G   s(   ddl m} ||g|R ||  dS )z$Returns a synchronized shared objectr   )Valuer$   r   )r;   r@   r   )r   r<   r$   r=   r@   r   r   r   r@      s    zBaseContext.Valuec                C   s    ddl m} |||||  dS )z#Returns a synchronized shared arrayr   )ArrayrA   )r;   rB   r   )r   r<   r?   r$   rB   r   r   r   rB      s    zBaseContext.Arrayc                 C   s,   t jdkr(tt ddr(ddlm} |  dS )zCheck whether this is a fake forked process in a frozen executable.
        If so then run code specified by commandline and exit.
        win32frozenFr   )freeze_supportN)sysplatformgetattrspawnrE   )r   rE   r   r   r   rE      s    zBaseContext.freeze_supportc                 C   s   ddl m} | S )zZReturn package logger -- if it does not already exist then
        it is created.
        r   )
get_logger)utilrJ   )r   rJ   r   r   r   rJ      s    zBaseContext.get_loggerc                 C   s   ddl m} ||S )z8Turn on logging and add a handler which prints to stderrr   )log_to_stderr)rK   rL   )r   levelrL   r   r   r   rL      s    zBaseContext.log_to_stderrc                 C   s   ddl m} dS )zVInstall support for sending connections and sockets
        between processes
        r   )r   N) r   )r   r   r   r   r   allow_connection_pickling   s    z%BaseContext.allow_connection_picklingc                 C   s   ddl m} || dS )zSets the path to a python.exe or pythonw.exe binary used to run
        child processes instead of sys.executable when using the 'spawn'
        start method.  Useful for people embedding Python.
        r   )set_executableN)rI   rP   )r   
executablerP   r   r   r   rP      s    zBaseContext.set_executablec                 C   s   ddl m} || dS )zkSet list of module names to try to load in forkserver process.
        This is really just a hint.
        r   )set_forkserver_preloadN)
forkserverrR   )r   module_namesrR   r   r   r   rR      s    z"BaseContext.set_forkserver_preloadc                 C   sF   |d u r| S zt | }W n  ty8   td| d Y n0 |  |S )Nzcannot find context for %r)_concrete_contextsKeyError
ValueError_check_available)r   methodr   r   r   r   r      s    zBaseContext.get_contextFc                 C   s   | j S N)_namer   
allow_noner   r   r   get_start_method   s    zBaseContext.get_start_methodc                 C   s   t dd S )Nz+cannot set start method of concrete context)rW   r   rY   forcer   r   r   set_start_method   s    zBaseContext.set_start_methodc                 C   s   t  dS )z_Controls how objects will be reduced to a form that can be
        shared with other processes.r   )globalsgetr   r   r   r   reducer   s    zBaseContext.reducerc                 C   s   |t  d< d S )Nr   )rb   )r   r   r   r   r   re      s    c                 C   s   d S rZ   r   rd   r   r   r   rX      s    zBaseContext._check_available)T)N)r   )r   )NN)r   )r   )NNr   N)N)N)F)F)+r   r	   r
   r   r   r   r   staticmethodr   current_processparent_processactive_childrenr   r   r   r    r"   r#   r%   r'   r(   r)   r.   r1   r2   r3   r:   r>   r@   rB   rE   rJ   rL   rO   rP   rR   r   r^   ra   propertyre   setterrX   r   r   r   r   r      sR   









  







r   c                   @   s   e Zd ZdZedd ZdS )ProcessNc                 C   s   t  j| S rZ   )_default_contextr   rl   _Popen)process_objr   r   r   rn      s    zProcess._Popenr   r	   r
   _start_methodrf   rn   r   r   r   r   rl      s   rl   c                       sF   e Zd ZeZdd Zd fdd	ZdddZdd	d
Zdd Z  Z	S )DefaultContextc                 C   s   || _ d | _d S rZ   )rm   _actual_context)r   r4   r   r   r   __init__   s    zDefaultContext.__init__Nc                    s0   |d u r | j d u r| j| _ | j S t |S d S rZ   )rs   rm   superr   )r   rY   	__class__r   r   r      s
    
zDefaultContext.get_contextFc                 C   s<   | j d ur|std|d u r,|r,d | _ d S | || _ d S )Nzcontext has already been set)rs   RuntimeErrorr   r_   r   r   r   ra      s    zDefaultContext.set_start_methodc                 C   s"   | j d u r|rd S | j| _ | j jS rZ   )rs   rm   r[   r\   r   r   r   r^      s
    
zDefaultContext.get_start_methodc                 C   sB   t jdkrdgS t jdkr"ddgnddg}tjr:|d |S d S )NrC   rI   darwinforkrS   )rF   rG   r   HAVE_SEND_HANDLEappend)r   methodsr   r   r   get_all_start_methods   s    

z$DefaultContext.get_all_start_methods)N)F)F)
r   r	   r
   rl   rt   r   ra   r^   r~   __classcell__r   r   rv   r   rr      s   

rr   rC   c                   @   s   e Zd ZdZedd ZdS )ForkProcessrz   c                 C   s   ddl m} || S Nr   )Popen)
popen_forkr   ro   r   r   r   r   rn     s    zForkProcess._PopenNrp   r   r   r   r   r     s   r   c                   @   s   e Zd ZdZedd ZdS )SpawnProcessrI   c                 C   s   ddl m} || S r   )popen_spawn_posixr   r   r   r   r   rn     s    SpawnProcess._PopenNrp   r   r   r   r   r     s   r   c                   @   s   e Zd ZdZedd ZdS )ForkServerProcessrS   c                 C   s   ddl m} || S r   )popen_forkserverr   r   r   r   r   rn      s    zForkServerProcess._PopenNrp   r   r   r   r   r     s   r   c                   @   s   e Zd ZdZeZdS )ForkContextrz   N)r   r	   r
   r[   r   rl   r   r   r   r   r   %  s   r   c                   @   s   e Zd ZdZeZdS SpawnContextrI   Nr   r	   r
   r[   r   rl   r   r   r   r   r   )  s   r   c                   @   s   e Zd ZdZeZdd ZdS )ForkServerContextrS   c                 C   s   t jstdd S )Nz%forkserver start method not available)r   r{   rW   rd   r   r   r   rX   0  s    z"ForkServerContext._check_availableN)r   r	   r
   r[   r   rl   rX   r   r   r   r   r   -  s   r   )rz   rI   rS   ry   rI   rz   c                   @   s   e Zd ZdZedd ZdS )r   rI   c                 C   s   ddl m} || S r   )Zpopen_spawn_win32r   r   r   r   r   rn   D  s    r   Nrp   r   r   r   r   r   B  s   c                   @   s   e Zd ZdZeZdS r   r   r   r   r   r   r   I  s   c                 C   s   t |  t_d S rZ   )rU   rm   rs   )rY   r   r   r   _force_start_methodV  s    r   c                   C   s   t tdd S )Nspawning_popen)rH   _tlsr   r   r   r   get_spawning_popen_  s    r   c                 C   s
   | t _d S rZ   )r   r   )popenr   r   r   set_spawning_popenb  s    r   c                 C   s    t  d u rtdt| j d S )NzF%s objects should only be shared between processes through inheritance)r   rx   typer   )objr   r   r   assert_spawninge  s    
r   ) r   rF   	threadingrN   r   r   __all__	Exceptionr   r   r   r   objectr   BaseProcessrl   rr   rG   r   r   r   r   r   r   rU   rm   r   localr   r   r   r   r   r   r   r   <module>   sJ    ?,