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locks.cpython-38.opt-2.pyc
U ) .�'�6� @ s� d Z ddlZddlZddlZddlmZ ddlmZ ddlmZ ddlmZ G dd � d �Z G d d � d �Z G d d � d e �Z G dd� d�Z G dd� de �Z G dd� de �ZG dd� de�ZdS ))�Lock�Event� Condition� Semaphore�BoundedSemaphore� N� )�events)�futures)� exceptions)� coroutinesc @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�_ContextManagerc C s || _ d S �N)�_lock)�self�lock� r �,/opt/python38/lib/python3.8/asyncio/locks.py�__init__" s z_ContextManager.__init__c C s d S r r �r r r r � __enter__% s z_ContextManager.__enter__c G s z| j �� W 5 d | _ X d S r )r �release�r �argsr r r �__exit__* s z_ContextManager.__exit__N)�__name__� __module__� __qualname__r r r r r r r r s r c @ sR e Zd Zdd� Zdd� Zejdd� �Zej e_ dd� Z d d � Z d d � Z d d� Z dS )�_ContextManagerMixinc C s t d��d S )Nz9"yield from" should be used as context manager expression)� RuntimeErrorr r r r r 2 s �z _ContextManagerMixin.__enter__c G s d S r r r r r r r 6 s z _ContextManagerMixin.__exit__c c s& t jdtdd� | �� E d H t| �S )NzD'with (yield from lock)' is deprecated use 'async with lock' instead� �� stacklevel)�warnings�warn�DeprecationWarning�acquirer r r r r �__iter__; s �z _ContextManagerMixin.__iter__c � s | � � I d H t| �S r )r% r r r r r Z __acquire_ctxU s z"_ContextManagerMixin.__acquire_ctxc C s t jdtdd� | �� �� S )Nz='with await lock' is deprecated use 'async with lock' insteadr r )r" r# r$ �!_ContextManagerMixin__acquire_ctx� __await__r r r r r( Y s �z _ContextManagerMixin.__await__c � s | � � I d H d S r )r% r r r r � __aenter__` s z _ContextManagerMixin.__aenter__c � s | � � d S r )r )r �exc_type�exc�tbr r r � __aexit__f s z _ContextManagerMixin.__aexit__N)r r r r r �types� coroutiner& r Z _is_coroutiner' r( r) r- r r r r r 1 s r c sJ e Zd Zdd�dd�Z� fdd�Zdd� Zd d � Zd d � Zd d� Z� Z S )r N��loopc C s: d | _ d| _|d kr t�� | _n|| _tjdtdd� d S �NF�[The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10.r r )�_waiters�_lockedr �get_event_loop�_loopr" r# r$ �r r1 r r r r � s �z Lock.__init__c sL t � �� }| jrdnd}| jr2|� dt| j�� �}d|dd� � d|� d�S � N�locked�unlocked� , waiters:�<r ���� [�]>)�super�__repr__r5 r4 �len�r �res�extra�� __class__r r rB � s z Lock.__repr__c C s | j S r )r5 r r r r r: � s z Lock.lockedc � s� | j s.| jd ks$tdd� | jD ��r.d| _ dS | jd krBt�� | _| j�� }| j�|� z"z|I d H W 5 | j�|� X W n& t j k r� | j s�| � � � Y nX d| _ dS )Nc s s | ]}|� � V qd S r )� cancelled)�.0�wr r r � <genexpr>� s z Lock.acquire.<locals>.<genexpr>T) r5 r4 �all� collections�dequer7 � create_future�append�remover �CancelledError�_wake_up_first�r �futr r r r% � s& � z Lock.acquirec C s" | j rd| _ | �� ntd��d S )NFzLock is not acquired.)r5 rT r r r r r r � s z Lock.releasec C sJ | j s d S ztt| j ��}W n tk r2 Y d S X |�� sF|�d� d S �NT)r4 �next�iter� StopIteration�done� set_resultrU r r r rT � s zLock._wake_up_first) r r r r rB r: r% r rT � __classcell__r r rG r r j s 6 r c sJ e Zd Zdd�dd�Z� fdd�Zdd� Zd d � Zd d � Zd d� Z� Z S )r Nr0 c C s> t �� | _d| _|d kr$t�� | _n|| _tjdt dd� d S r2 ) rN rO r4 �_valuer r6 r7 r" r# r$ r8 r r r r s �zEvent.__init__c sL t � �� }| jrdnd}| jr2|� dt| j�� �}d|dd� � d|� d�S ) N�setZunsetr< r= r r> r? r@ )rA rB r^ r4 rC rD rG r r rB s zEvent.__repr__c C s | j S r �r^ r r r r �is_set s z Event.is_setc C s. | j s*d| _ | jD ]}|�� s|�d� qd S rW )r^ r4 r[ r\ rU r r r r_ s z Event.setc C s d| _ d S )NFr` r r r r �clear" s z Event.clearc � sF | j r dS | j�� }| j�|� z|I d H W �dS | j�|� X d S rW )r^ r7 rP r4 rQ rR rU r r r �wait( s z Event.wait) r r r r rB ra r_ rb rc r] r r rG r r � s r c sN e Zd Zddd�dd�Z� fdd�Zdd� Zd d � Zdd d �Zdd� Z� Z S )r Nr0 c C s~ |d krt �� | _n|| _tjdtdd� |d kr>t|d�}n|j| jk rRtd��|| _|j | _ |j | _ |j | _ t � � | _d S )Nr3 r r r0 z"loop argument must agree with lock)r r6 r7 r" r# r$ r � ValueErrorr r: r% r rN rO r4 )r r r1 r r r r E s � zCondition.__init__c sN t � �� }| �� rdnd}| jr4|� dt| j�� �}d|dd� � d|� d�S r9 )rA rB r: r4 rC rD rG r r rB [ s zCondition.__repr__c � s� | � � std��| �� z@| j�� }| j� |� z|I d H W �W �dS | j� |� X W 5 d}z| �� I d H W q�W q^ tjk r� d}Y q^X q^|r�tj�X d S )Nz cannot wait on un-acquired lockFT) r: r r r% r rS r7 rP r4 rQ rR )r rI rV r r r rc b s$ zCondition.waitc � s$ |� }|s | � � I d H |� }q|S r )rc )r � predicate�resultr r r �wait_for� s zCondition.wait_forr c C sJ | � � std��d}| jD ]*}||kr* qF|�� s|d7 }|�d� qd S )Nz!cannot notify on un-acquired lockr r F)r: r r4 r[ r\ )r �n�idxrV r r r �notify� s zCondition.notifyc C s | � t| j�� d S r )rj rC r4 r r r r � notify_all� s zCondition.notify_all)N)r ) r r r r rB rc rg rj rk r] r r rG r r ; s % r c sL e Zd Zddd�dd�Z� fdd�Zdd � Zd d � Zd d � Zdd� Z� Z S )r r Nr0 c C sN |dk rt d��|| _t�� | _|d kr4t�� | _n|| _tj dt dd� d S )Nr z$Semaphore initial value must be >= 0r3 r r ) rd r^ rN rO r4 r r6 r7 r" r# r$ �r �valuer1 r r r r � s �zSemaphore.__init__c sV t � �� }| �� rdn d| j� �}| jr<|� dt| j�� �}d|dd� � d|� d�S ) Nr: zunlocked, value:r< r= r r> r? r@ )rA rB r: r^ r4 rC rD rG r r rB � s zSemaphore.__repr__c C s, | j r(| j �� }|�� s |�d � d S q d S r )r4 �popleftr[ r\ )r �waiterr r r � _wake_up_next� s zSemaphore._wake_up_nextc C s | j dkS )Nr r` r r r r r: � s zSemaphore.lockedc � st | j dkrb| j�� }| j�|� z|I d H W q |�� | j dkrX|�� sX| �� � Y q X q | j d8 _ dS )Nr r T)r^ r7 rP r4 rQ �cancelrI rp rU r r r r% � s zSemaphore.acquirec C s | j d7 _ | �� d S )Nr )r^ rp r r r r r � s zSemaphore.release)r ) r r r r rB rp r: r% r r] r r rG r r � s r c s0 e Zd Zddd�� fdd� Z� fdd�Z� ZS ) r r Nr0 c s. |rt jdtdd� || _t� j||d� d S )Nr3 r r r0 )r" r# r$ � _bound_valuerA r rl rG r r r s �zBoundedSemaphore.__init__c s" | j | jkrtd��t� �� d S )Nz(BoundedSemaphore released too many times)r^ rr rd rA r r rG r r r s zBoundedSemaphore.release)r )r r r r r r] r r rG r r s r )�__all__rN r. r" � r r r r r r r r r r r r r r r �<module> s "9 DzN