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Editing: sync.cpython-310.pyc
o �6�ahK � @ sT d dl Zd dlZd dlZd dlZd dlZd dlZd dlZd dlZd dl Z d dl m Z m Z d dl mZmZmZmZmZ ddlmZ ddlmZ dd� Zd ed efd d �ZG d d� d�ZG dd� d�ZG dd� d�Z eZ e d d ddeded d eedef ge f fdd��Z e d d edef deded d e fdd��Z d dd�Z dS ) � N)�Future�ThreadPoolExecutor)�Any�Callable�Dict�Optional�overload� )�CurrentThreadExecutor)�Localc C sV | D ]&}z|� � | � |�kr|�| � |�� W q ty( |�| � |�� Y qw d S �N)�get�set� LookupError)�context�cvar� r �./usr/lib/python3/dist-packages/asgiref/sync.py�_restore_context s � ��r �func�returnc C sV t jdkr t�| �S t�| �r| j} t�| �st| tj �r&| j } t| tj �s t�| �S )N)� � ) �sys� version_info�asyncio�iscoroutinefunction�inspect�ismethod�__func__� isinstance� functools�partialr )r r r r � _iscoroutinefunction_or_partial s � � r# c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) �ThreadSensitiveContextai Async context manager to manage context for thread sensitive mode This context manager controls which thread pool executor is used when in thread sensitive mode. By default, a single thread pool executor is shared within a process. In Python 3.7+, the ThreadSensitiveContext() context manager may be used to specify a thread pool per context. This context manager is re-entrant, so only the outer-most call to ThreadSensitiveContext will set the context. Usage: >>> import time >>> async with ThreadSensitiveContext(): ... await sync_to_async(time.sleep, 1)() c C s d | _ d S r )�token��selfr r r �__init__? s z ThreadSensitiveContext.__init__c � s6 �zt j�� W | S ty t j�| �| _Y | S w r )� SyncToAsync�thread_sensitive_contextr r r r% r& r r r � __aenter__B s � ��z!ThreadSensitiveContext.__aenter__c � s8 �| j sd S tj�| d �}|r|�� tj�| j � d S r )r% r) �context_to_thread_executor�pop�shutdownr* �reset)r' �exc�value�tb�executorr r r � __aexit__J s �z ThreadSensitiveContext.__aexit__N)�__name__� __module__� __qualname__�__doc__r( r+ r4 r r r r r$ + s r$ c @ sN e Zd ZU dZi Zded< e� Zddd�Zdd� Z d d � Z d d � Z d d� Z dS )� AsyncToSynca� Utility class which turns an awaitable that only works on the thread with the event loop into a synchronous callable that works in a subthread. If the call stack contains an async loop, the code runs there. Otherwise, the code runs in a new loop in a new thread. Either way, this thread then pauses and waits to run any thread_sensitive code called from further down the call stack using SyncToAsync, before finally exiting once the async task returns. z,Dict[asyncio.Task[object], threading.Thread]� launch_mapFc C s� t |�rt|�stjddd� || _z| jj| _W n ty" Y nw |r*d | _d S zt� � | _W d S t yY t t j dd �}|rS|t�� krSt t j dd �| _Y d S d | _Y d S w )Nz4async_to_sync was passed a non-async-marked callable� )� stacklevel�main_event_loop_pid�main_event_loop)�callabler# �warnings�warn� awaitable�__self__�AttributeErrorr> r �get_running_loop� RuntimeError�getattrr) � threadlocal�os�getpid)r' rB �force_new_loopr= r r r r( h s0 � � � � �zAsyncToSync.__init__c O sT zt �� }W n ty Y n w |�� rtd��t�� g}t� }t�� }t | j d�r/| j j }nd }t � }|| j _ z[| � ||||t�� |�} | jrM| j�� sjt �� } tdd�} | �| j| | �} |re|�| � | �� n| j�| jj| � |rz|�|� W t | j d�r�| j ` |r�|| j _ t|d � |�� S t | j d�r�| j ` |r�|| j _ t|d � w )NznYou cannot use AsyncToSync in the same thread as an async event loop - just await the async function directly.�currentr �� max_workersr )r rE rF � is_running� contextvars� copy_contextr � threading�current_thread�hasattr� executorsrL r � main_wrapr �exc_infor> �new_event_loopr �submit�_run_event_loop�run_until_future�result�call_soon_threadsafe� create_taskr ) r' �args�kwargs� event_loopr � call_result� source_thread�old_current_executor�current_executorrB �loop� loop_executor� loop_futurer r r �__call__� s^ �� � � � � �zAsyncToSync.__call__c s� t �|� zm|�|� W z[t �|�� � D ]}|�� q� fdd�}|�|� � � D ]}|�� r0q)|�� durA|�d|�� |d�� q)t|d�r[|�|� � � W |� � t �| j � dS W |� � t �| j � dS |� � t �| j � w zYt �|�� � D ]}|�� q{� fdd�}|�|� � � D ]}|�� r�q�|�� dur�|�d|�� |d�� q�t|d�r�|�|� � � W |� � t �| j � w W |� � t �| j � w |� � t �| j � w )zP Runs the given event loop (designed to be called in a thread). c � s �t j� ddi�I d H d S )N�return_exceptionsT)r �gatherr ��tasksr r rk � s �z+AsyncToSync._run_event_loop.<locals>.gatherNz(unhandled exception during loop shutdown)�message� exception�task�shutdown_asyncgens) r �set_event_loop�run_until_complete� all_tasks�cancel� cancelledro �call_exception_handlerrT rq �closer> )r' rf �cororp rk r rl r rZ � sn ��� ��� ��� ��zAsyncToSync._run_event_loopc C s t �| j|�}t �|| j�S �z* Include self for methods )r! r" ri �update_wrapperrB )r' �parent�objtyper r r r �__get__� s zAsyncToSync.__get__c � s �|dur t |d � t�� }|| j|< zaz*|d r3z|d � ty2 | j|i |��I dH }Y n w | j|i |��I dH }W n tyV } z |�| � W Y d} ~ nd} ~ ww |�|� W | j|= t� � |d< dS W | j|= t� � |d< dS | j|= t� � |d< w )zs Wraps the awaitable with something that puts the result into the result/exception future. Nr r ) r r) �get_current_taskr: � BaseExceptionrB � set_exception� set_resultrP rQ ) r' r_ r` rb rc rW r � current_taskr\ �er r r rV � s4 � ���� ��zAsyncToSync.main_wrapN)F) r5 r6 r7 r8 r: �__annotations__r rU r( ri rZ r~ rV r r r r r9 T s !E$ r9 c @ s� e Zd ZU dZdejv r e�� Ze� e e ejd �d�� i Z de d< e�� Ze dd�Ze�d�Zde d< e�d �Zd e d < e�� Zd e d < d dedef dede d ddfdd�Z dd� Z dd� Z dd � Z e!d d � �Z"dS ) r) a Utility class which turns a synchronous callable into an awaitable that runs in a threadpool. It also sets a threadlocal inside the thread so calls to AsyncToSync can escape it. If thread_sensitive is passed, the code will run in the same thread as any outer code. This is needed for underlying Python code that is not threadsafe (for example, code which handles SQLite database connections). If the outermost program is async (i.e. SyncToAsync is outermost), then this will be a dedicated single sub-thread that all sync code runs in, one after the other. If the outermost program is sync (i.e. AsyncToSync is outermost), this will just be the main thread. This is achieved by idling with a CurrentThreadExecutor while AsyncToSync is blocking its sync parent, rather than just blocking. If executor is passed in, that will be used instead of the loop's default executor. In order to pass in an executor, thread_sensitive must be set to False, otherwise a TypeError will be raised. � ASGI_THREADSrM z,Dict[threading.Thread, asyncio.Task[object]]r: r r* zcontextvars.ContextVar[str]�deadlock_contextz contextvars.ContextVar[bool]z5weakref.WeakKeyDictionary[object, ThreadPoolExecutor]r, TNr .�thread_sensitiver3 r r c C sx t |�rt|�r td��|| _t�| |� || _tjj | _ |r'|d ur'td��|| _ z|j | _ W d S t y; Y d S w )Nz4sync_to_async can only be applied to sync functions.z6executor must not be set when thread_sensitive is True) r? r# � TypeErrorr r! r{ �_thread_sensitiver � coroutines� _is_coroutine� _executorrC rD )r' r r� r3 r r r r( S s �zSyncToAsync.__init__c � s` �t �� }| jrQttjd�rtjj}nA| jr7| j�d �r7| j�� }|| j v r,| j | }n(t dd�}|| j |< n | j rD| j �d�rDt d��| j }| j rP| j �d� n| j}t�� }tj| jg|�R i |��}|j}|f}i }z3|�|tj| j|| �� t�� |g|�R i |���} t j| d d�I d H } W t |� | j r�| j �d� | S t |� | j r�| j �d� w w )NrL r rM Fz9Single thread executor already being used, would deadlockT)�timeout) r rE r� rT r9 rU rL r* r r, r r� rF �single_thread_executorr r� rP rQ r! r" r �run�run_in_executor�thread_handlerr r rW �wait_forr ) r' r_ r` rf r3 r* r �childr �future�retr r r ri g sf � � � ����� ��zSyncToAsync.__call__c C s t �| j|�S rz )r! r" ri )r' r| r} r r r r~ � s zSyncToAsync.__get__c O s� || j _t�� | j _t�� }tj� |�|krd}n|| j|< d}z0|d rBz|d � t yA ||i |�� Y W |r@| j|= S S w ||i |��W |rP| j|= S S |rW| j|= w )zE Wraps the sync application with exception handling. FTr ) rH r> rI rJ r= rR rS r9 r: r r� ) r' rf � source_taskrW r r_ r` rS � parent_setr r r r� � s, �� � zSyncToAsync.thread_handlerc C s zt �� W S ty Y dS w )zi Implementation of asyncio.current_task() that returns None if there is no task. N)r r� rF r r r r r � s �z SyncToAsync.get_current_task�TN)#r5 r6 r7 r8 rI �environr �get_event_looprf �set_default_executorr �intr: r� rR �localrH r� rP � ContextVarr* r� �weakref�WeakKeyDictionaryr, r r �boolr r( ri r~ r� � staticmethodr r r r r r) sD � � � �� ��� �@!r) Tr� r3 r .c C � d S r r �r r� r3 r r r � sync_to_async� � r� c C r� r r r� r r r r� � r� c s$ | d u r � �fdd�S t | �� d�S )Nc s t | �� d�S )N�r� r3 �r) )�f�r3 r� r r �<lambda>� s �z sync_to_async.<locals>.<lambda>r� r� r� r r� r r� � s �)NTNr� ) �asyncio.coroutinesr rP r! r rI r rR r@ r� �concurrent.futuresr r �typingr r r r r �current_thread_executorr r� r r r� r# r$ r9 r) � async_to_syncr� r r r r �<module> sd ) F C���� �� ��� � �
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