a
    zeC"                     @   s   d Z dZddlmZ ddlZddlZddlZddlZddlZddl	Z	e
 Zdae Zdd Zee ee	dre	jejejejd	 G d
d deZdd ZG dd dejZG dd dejZdS )zImplements ThreadPoolExecutor.z"Brian Quinlan (brian@sweetapp.com)    )_baseNFc                  C   sf   t  daW d    n1 s0    Y  tt } | D ]\}}|d  q8| D ]\}}|  qPd S NT)_global_shutdown_lock	_shutdownlist_threads_queuesitemsputjoin)r   tq r   //usr/lib/python3.9/concurrent/futures/thread.py_python_exit   s    "r   register_at_fork)beforeafter_in_childafter_in_parentc                   @   s&   e Zd Zdd Zdd ZeejZdS )	_WorkItemc                 C   s   || _ || _|| _|| _d S N)futurefnargskwargs)selfr   r   r   r   r   r   r   __init__/   s    z_WorkItem.__init__c              
   C   sl   | j  sd S z| j| ji | j}W n4 tyZ } z| j | d } W Y d }~nd }~0 0 | j | d S r   )r   set_running_or_notify_cancelr   r   r   BaseExceptionset_exception
set_result)r   resultexcr   r   r   run5   s    
z_WorkItem.runN)	__name__
__module____qualname__r   r"   classmethodtypesGenericAlias__class_getitem__r   r   r   r   r   .   s   r   c                 C   s   |d urPz||  W n: t yN   tjjddd |  }|d urH|  Y d S 0 zx|jdd}|d ur|  ~|  }|d ur|j  ~qR|  }t	s|d u s|j	r|d urd|_	|
d  W d S ~qRW n" t y   tjjddd Y n0 d S )NzException in initializer:T)exc_info)blockzException in worker)r   r   LOGGERcritical_initializer_failedgetr"   _idle_semaphorereleaser   r	   )executor_referenceZ
work_queueinitializerinitargsexecutor	work_itemr   r   r   _workerE   s8    

r7   c                   @   s   e Zd ZdZdS )BrokenThreadPoolzR
    Raised when a worker thread in a ThreadPoolExecutor failed initializing.
    N)r#   r$   r%   __doc__r   r   r   r   r8   p   s   r8   c                   @   s`   e Zd Ze jZdddZdd Ze	j
jje_dd	 Zd
d ZdddddZe	j
jje_dS )ThreadPoolExecutorN r   c                 C   s   |du rt dt pdd }|dkr.td|durFt|sFtd|| _t | _	t
d| _t | _d| _d| _t
 | _|pd	|   | _|| _|| _dS )
a  Initializes a new ThreadPoolExecutor instance.

        Args:
            max_workers: The maximum number of threads that can be used to
                execute the given calls.
            thread_name_prefix: An optional name prefix to give our threads.
            initializer: A callable used to initialize worker threads.
            initargs: A tuple of arguments to pass to the initializer.
        N          r   z"max_workers must be greater than 0zinitializer must be a callableFzThreadPoolExecutor-%d)minos	cpu_count
ValueErrorcallable	TypeError_max_workersqueueSimpleQueue_work_queue	threading	Semaphorer0   set_threads_brokenr   Lock_shutdown_lock_counter_thread_name_prefix_initializer	_initargs)r   max_workersZthread_name_prefixr3   r4   r   r   r   r   {   s$    


zThreadPoolExecutor.__init__c             	   O   s   | j  tv | jrt| j| jr,tdtr8tdt }t||||}| j	
| |   |W  d    W  d    S 1 s0    Y  W d    n1 s0    Y  d S )Nz*cannot schedule new futures after shutdownz6cannot schedule new futures after interpreter shutdown)rO   r   rM   r8   r   RuntimeErrorr   Futurer   rH   r	   _adjust_thread_count)r   r   r   r   fwr   r   r   submit   s    
zThreadPoolExecutor.submitc                 C   s   | j jddrd S | jfdd}t| j}|| jk rd| jp>| |f }tj|t	t
| || j| j| jfd}|  | j| | jt|< d S )Nr   )timeoutc                 S   s   | d  d S r   )r	   )_r   r   r   r   
weakref_cb   s    z;ThreadPoolExecutor._adjust_thread_count.<locals>.weakref_cbz%s_%d)nametargetr   )r0   acquirerH   lenrL   rE   rQ   rI   Threadr7   weakrefrefrR   rS   startaddr   )r   r]   Znum_threadsZthread_namer   r   r   r   rW      s$    



z'ThreadPoolExecutor._adjust_thread_countc              	   C   st   | j Z d| _z| j }W n tjy4   Y qRY n0 |d ur|jt| j qW d    n1 sf0    Y  d S )NzBA thread initializer failed, the thread pool is not usable anymore)	rO   rM   rH   
get_nowaitrF   Emptyr   r   r8   )r   r6   r   r   r   r.      s    
z&ThreadPoolExecutor._initializer_failedTF)cancel_futuresc             	   C   s   | j b d| _|rNz| j }W n tjy8   Y qNY n0 |d ur|j  q| jd  W d    n1 sn0    Y  |r| j	D ]}|
  qd S r   )rO   r   rH   rg   rF   rh   r   cancelr	   rL   r
   )r   waitri   r6   r   r   r   r   shutdown   s    
*
zThreadPoolExecutor.shutdown)Nr;   Nr   )T)r#   r$   r%   	itertoolscount__next__rP   r   rZ   r   Executorr9   rW   r.   rl   r   r   r   r   r:   v   s   
  
&r:   )r9   
__author__concurrent.futuresr   rm   rF   rI   r'   rc   r@   WeakKeyDictionaryr   r   rN   r   r   _register_atexithasattrr   r`   _at_fork_reinitr1   objectr   r7   BrokenExecutorr8   rp   r:   r   r   r   r   <module>   s,   

+