o
    hI                     @  s   U d dl mZ d dlZd dlmZ d dlmZmZmZm	Z	m
Z
 d dlmZ ddlmZ e	dZe	d	Zd#ddZd#ddZd#ddZd$ddZe Zded< i Zded< eddG dd dZG dd dejZG dd  d ee ZG d!d" d"ee ZdS )%    )annotationsN)	dataclass)AnyGenericLiteralTypeVaroverload)WeakKeyDictionary   )get_async_backendTDreturnNonec                        t   I dH  dS )z
    Check for cancellation and allow the scheduler to switch to another task.

    Equivalent to (but more efficient than)::

        await checkpoint_if_cancelled()
        await cancel_shielded_checkpoint()


    .. versionadded:: 3.0

    N)r   
checkpoint r   r   b/var/www/html/construction_image-detection-poc/venv/lib/python3.10/site-packages/anyio/lowlevel.pyr         r   c                     r   )z
    Enter a checkpoint if the enclosing cancel scope has been cancelled.

    This does not allow the scheduler to switch to a different task.

    .. versionadded:: 3.0

    N)r   checkpoint_if_cancelledr   r   r   r   r      s   	r   c                     r   )z
    Allow the scheduler to switch to another task but without checking for cancellation.

    Equivalent to (but potentially more efficient than)::

        with CancelScope(shield=True):
            await checkpoint()


    .. versionadded:: 3.0

    N)r   cancel_shielded_checkpointr   r   r   r   r   *   r   r   objectc                   C  s
   t   S )ze
    Return a backend specific token object that can be used to get back to the event
    loop.

    )r   current_tokenr   r   r   r   r   :   s   
r   z&WeakKeyDictionary[Any, dict[str, Any]]	_run_varszdict[Any, _TokenWrapper]_token_wrappersT)frozenc                   @  s   e Zd ZU dZded< dS )_TokenWrapper)_token__weakref__r   r   N)__name__
__module____qualname__	__slots____annotations__r   r   r   r   r   G   s   
 r   c                   @  s   e Zd Ze ZdS )_NoValueSetN)r   r    r!   enumautoNO_VALUE_SETr   r   r   r   r$   M   s    r$   c                   @  s   e Zd ZdZd	ddZdS )
RunvarToken_var_value	_redeemedvar	RunVar[T]value%T | Literal[_NoValueSet.NO_VALUE_SET]c                 C  s   || _ || _d| _d S )NFr)   )selfr-   r/   r   r   r   __init__T   s   
zRunvarToken.__init__N)r-   r.   r/   r0   )r   r    r!   r"   r2   r   r   r   r   r(   Q   s    r(   c                   @  s   e Zd ZU dZdZejZded< e Z	ded< efd$ddZ
ed%ddZed&ddZed'ddZefd(ddZd)ddZd*dd Zd+d!d"Zd#S ),RunVarz[
    Like a :class:`~contextvars.ContextVar`, except scoped to the running event loop.
    _name_defaultz!Literal[_NoValueSet.NO_VALUE_SET]r'   zset[_TokenWrapper]r   namestrdefaultr0   c                 C  s   || _ || _d S Nr4   )r1   r7   r9   r   r   r   r2   e   s   
zRunVar.__init__r   dict[str, T]c                 C  s4   t  }zt| W S  ty   i  }t|< | Y S w r:   )r   r   KeyError)r1   tokenrun_varsr   r   r   _current_varsk   s   
zRunVar._current_varsr   T | Dc                 C     d S r:   r   r1   r9   r   r   r   gett      z
RunVar.getr   c                 C  rA   r:   r   r1   r   r   r   rC   w   rD   %D | Literal[_NoValueSet.NO_VALUE_SET]c                 C  s\   z| j | j W S  ty$   |tjur| Y S | jtjur"| j Y S Y nw td| j d)NzRun variable "z!" has no value and no default set)r?   r5   r<   r3   r'   r6   LookupErrorrB   r   r   r   rC   z   s   

r/   RunvarToken[T]c                 C  s*   | j }t| || jtj}||| j< |S r:   )r?   r(   rC   r5   r3   r'   )r1   r/   current_varsr=   r   r   r   set   s   
z
RunVar.setr=   r   c                 C  sf   |j | ur	td|jrtd|jtju r'z| j| j= W n ty&   Y nw |j| j| j< d|_d S )Nz)This token does not belong to this RunVarz This token has already been usedT)	r*   
ValueErrorr,   r+   r$   r'   r?   r5   r<   )r1   r=   r   r   r   reset   s   

zRunVar.resetc                 C  s   d| j dS )Nz<RunVar name=>)r5   rE   r   r   r   __repr__   s   zRunVar.__repr__N)r7   r8   r9   r0   )r   r;   )r9   r   r   r@   )r   r   )r9   rF   r   r@   )r/   r   r   rH   )r=   rH   r   r   )r   r8   )r   r    r!   __doc__r"   r$   r'   r#   rJ   r   r2   propertyr?   r   rC   rL   rN   r   r   r   r   r3   Z   s$   
 

r3   )r   r   )r   r   )
__future__r   r%   dataclassesr   typingr   r   r   r   r   weakrefr	   _core._eventloopr   r   r   r   r   r   r   r   r#   r   r   Enumr$   r(   r3   r   r   r   r   <module>   s&    



		