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windows_events.cpython-38.pyc
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N��loopc s& t � j|d� | jr | jd= || _d S �Nr ���)�super�__init__�_source_traceback�_ov)�self�ovr �� __class__� �5/opt/python38/lib/python3.8/asyncio/windows_events.pyr 1 s z_OverlappedFuture.__init__c sH t � �� }| jd k rD| jjr dnd}|�dd|� d| jjd�d�� |S )N�pendingZ completedr z overlapped=<z, �#x�>)r � _repr_infor r" �insert�address�r �info�stater r r! r% 7 s z _OverlappedFuture._repr_infoc C sr | j d krd S z| j �� W nJ tk rf } z,d|| d�}| jrJ| j|d< | j�|� W 5 d }~X Y nX d | _ d S )Nz&Cancelling an overlapped future failed��message� exception�future�source_traceback)r �cancel�OSErrorr �_loop�call_exception_handler)r �exc�contextr r r! �_cancel_overlapped> s � z$_OverlappedFuture._cancel_overlappedc s | � � t� �� S �N)r6 r r0 �r r r r! r0 N s z_OverlappedFuture.cancelc s t � �|� | �� d S r7 )r � set_exceptionr6 �r r- r r r! r9 R s z _OverlappedFuture.set_exceptionc s t � �|� d | _d S r7 )r � set_resultr �r �resultr r r! r; V s z _OverlappedFuture.set_result) �__name__� __module__� __qualname__�__doc__r r% r6 r0 r9 r; � __classcell__r r r r! r + s r c sn e Zd ZdZdd�� fdd� Zdd� Z� fdd �Zd d � Zd d � Z� fdd�Z � fdd�Z � fdd�Z � Z S )�_BaseWaitHandleFuturez2Subclass of Future which represents a wait handle.Nr c s8 t � j|d� | jr | jd= || _|| _|| _d| _d S )Nr r T)r r r r �_handle� _wait_handle� _registered)r r �handle� wait_handler r r r! r ^ s z _BaseWaitHandleFuture.__init__c C s t �| jd�t jkS �Nr )�_winapiZWaitForSingleObjectrD Z WAIT_OBJECT_0r8 r r r! �_polll s �z_BaseWaitHandleFuture._pollc sd t � �� }|�d| jd��� | jd k rB| �� r4dnd}|�|� | jd k r`|�d| jd��� |S )Nzhandle=r# �signaledZwaitingz wait_handle=)r r% �appendrD rK rE r( r r r! r% q s z _BaseWaitHandleFuture._repr_infoc C s d | _ d S r7 )r �r �futr r r! �_unregister_wait_cb{ s z)_BaseWaitHandleFuture._unregister_wait_cbc C s� | j s d S d| _ | j}d | _zt�|� W n` tk r� } zB|jtjkrzd|| d�}| jrd| j|d< | j� |� W Y �d S W 5 d }~X Y nX | � d � d S �NFz$Failed to unregister the wait handler+ r/ ) rF rE � _overlappedZUnregisterWaitr1 �winerror�ERROR_IO_PENDINGr r2 r3 rP �r rH r4 r5 r r r! �_unregister_wait� s$ � z&_BaseWaitHandleFuture._unregister_waitc s | � � t� �� S r7 )rV r r0 r8 r r r! r0 � s z _BaseWaitHandleFuture.cancelc s | � � t� �|� d S r7 )rV r r9 r: r r r! r9 � s z#_BaseWaitHandleFuture.set_exceptionc s | � � t� �|� d S r7 )rV r r; r< r r r! r; � s z _BaseWaitHandleFuture.set_result) r> r? r@ rA r rK r% rP rV r0 r9 r; rB r r r r! rC [ s rC c sF e Zd ZdZdd�� fdd� Zdd� Z� fdd �Z� fd d �Z� ZS ) �_WaitCancelFuturezoSubclass of Future which represents a wait for the cancellation of a _WaitHandleFuture using an event. Nr c s t � j||||d� d | _d S )Nr )r r �_done_callback)r r �eventrH r r r r! r � s z_WaitCancelFuture.__init__c C s t d��d S )Nz'_WaitCancelFuture must not be cancelled)� RuntimeErrorr8 r r r! r0 � s z_WaitCancelFuture.cancelc s$ t � �|� | jd k r | �| � d S r7 )r r; rX r< r r r! r; � s z _WaitCancelFuture.set_resultc s$ t � �|� | jd k r | �| � d S r7 )r r9 rX r: r r r! r9 � s z _WaitCancelFuture.set_exception) r> r? r@ rA r r0 r; r9 rB r r r r! rW � s rW c s6 e Zd Zdd�� fdd� Z� fdd�Zdd� Z� ZS ) �_WaitHandleFutureNr c s< t � j||||d� || _d| _t�d ddd �| _d | _d S )Nr TF)r r � _proactorZ_unregister_proactorrR Z CreateEvent�_event� _event_fut)r r rG rH �proactorr r r r! r � s z_WaitHandleFuture.__init__c sF | j d k r"t�| j � d | _ d | _| j�| j� d | _t� �|� d S r7 ) r] rJ � CloseHandler^ r\ � _unregisterr r rP rN r r r! rP � s z%_WaitHandleFuture._unregister_wait_cbc C s� | j s d S d| _ | j}d | _zt�|| j� W n` tk r� } zB|jtjkr~d|| d�}| jrh| j|d< | j � |� W Y �d S W 5 d }~X Y nX | j � | j| j �| _d S rQ )rF rE rR ZUnregisterWaitExr] r1 rS rT r r2 r3 r\ � _wait_cancelrP r^ rU r r r! rV � s( � �z"_WaitHandleFuture._unregister_wait)r> r? r@ r rP rV rB r r r r! r[ � s r[ c @ s< e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � ZeZ d S ) � PipeServerzXClass representing a pipe server. This is much like a bound, listening socket. c C s, || _ t�� | _d | _d | _| �d�| _d S �NT)�_address�weakref�WeakSet�_free_instances�_pipe�_accept_pipe_future�_server_pipe_handle)r r' r r r! r � s zPipeServer.__init__c C s | j | �d� }| _ |S )NF)ri rk )r �tmpr r r! �_get_unconnected_pipe s z PipeServer._get_unconnected_pipec C sr | � � r d S tjtjB }|r&|tjO }t�| j|tjtjB tj B tj t j t j tj tj�}t �|�}| j�|� |S r7 )�closedrJ ZPIPE_ACCESS_DUPLEXZFILE_FLAG_OVERLAPPEDZ FILE_FLAG_FIRST_PIPE_INSTANCEZCreateNamedPipere ZPIPE_TYPE_MESSAGEZPIPE_READMODE_MESSAGEZ PIPE_WAITZPIPE_UNLIMITED_INSTANCESr �BUFSIZEZNMPWAIT_WAIT_FOREVER�NULL� PipeHandlerh �add)r �first�flags�h�piper r r! rk s( � � z PipeServer._server_pipe_handlec C s | j d kS r7 )re r8 r r r! rn s zPipeServer.closedc C sR | j d k r| j �� d | _ | jd k rN| jD ] }|�� q*d | _d | _| j�� d S r7 )rj r0 re rh �closeri �clear)r rv r r r! rw s zPipeServer.closeN) r> r? r@ rA r rm rk rn rw �__del__r r r r! rc � s rc c @ s e Zd ZdZdS )�_WindowsSelectorEventLoopz'Windows version of selector event loop.N)r> r? r@ rA r r r r! rz , s rz c sH e Zd ZdZd � fdd� Z� fdd�Zdd� Zd d � Zdd d �Z� Z S )r z2Windows version of proactor event loop using IOCP.Nc s |d krt � }t� �|� d S r7 )r r r )r r_ r r r! r 3 s zProactorEventLoop.__init__c sf z(| j d kst�| �| j� t� � � W 5 | j d k r`| j j}| j �� |d k rZ| j�|� d | _ X d S r7 ) Z_self_reading_futurer r0 r\ ra �AssertionError� call_soonZ_loop_self_readingr � run_forever�r r r r r! r} 8 s z ProactorEventLoop.run_foreverc � s8 | j �|�}|I d H }|� }| j||d|id�}||fS )N�addr��extra)r\ � connect_pipe�_make_duplex_pipe_transport)r �protocol_factoryr' �frv �protocol�transr r r! �create_pipe_connectionG s �z(ProactorEventLoop.create_pipe_connectionc � s. t � ��d� ����fdd� ����� �gS )Nc s d }zn| rN| � � }�j�|� ��� r4|�� W d S �� }�j||d� id� ��� }|d krdW d S �j�|�} W n� t k r� } zF|r�|� � dkr��� d||d�� |�� n�j r�t jd|dd� W 5 d }~X Y n2 tjk r� |r�|�� Y nX | �_| ��� d S ) Nr r� r zPipe accept failed)r, r- rv z Accept pipe failed on pipe %rT)�exc_info)r= rh �discardrn rw r� rm r\ � accept_piper1 �filenor3 Z_debugr �warningr �CancelledErrorrj �add_done_callback)r� rv r� r4 �r' �loop_accept_piper� r Zserverr r! r� R sH �� �z>ProactorEventLoop.start_serving_pipe.<locals>.loop_accept_pipe)N)rc r| )r r� r' r r� r! �start_serving_pipeO s ( z$ProactorEventLoop.start_serving_pipec � s� | � � } t| |||||||f| |d�| ��} z| I d H W nD ttfk rT � Y n, tk r~ | �� | �� I d H � Y nX | S )N)�waiterr� )� create_future�_WindowsSubprocessTransport� SystemExit�KeyboardInterrupt� BaseExceptionrw �_wait) r r� �args�shell�stdin�stdout�stderr�bufsizer� �kwargsr� Ztranspr r r! �_make_subprocess_transport} s* � ��z,ProactorEventLoop._make_subprocess_transport)N)N) r> r? r@ rA r r} r� r� r� rB r r r r! r 0 s 0 �r c @ s� e Zd ZdZd;dd�Zdd� Zdd� Zd d � Zd<d d �Zdd� Z d=dd�Z d>dd�Z d?dd�Z d@dd�Z dAdd�Zdd � Zd d � Zd d � Zd!d"� Zd#d$� ZdBd%d&�Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zd1d2� ZdCd3d4�Zd5d6� Z d7d8� Z d9d:� Z d S )Dr z#Proactor implementation using IOCP.r c C sD d | _ g | _t�tjtd|�| _i | _t� � | _ g | _ t� � | _ d S rI ) r2 �_resultsrR �CreateIoCompletionPort�INVALID_HANDLE_VALUErp �_iocp�_cacherf rg rF � _unregistered�_stopped_serving)r Z concurrencyr r r! r � s � zIocpProactor.__init__c C s | j d krtd��d S )NzIocpProactor is closed)r� rZ r8 r r r! � _check_closed� s zIocpProactor._check_closedc C sF dt | j� dt | j� g}| jd kr0|�d� d| jjd�|�f S )Nzoverlapped#=%sz result#=%srn z<%s %s>� )�lenr� r� r� rM r r> �join)r r) r r r! �__repr__� s � zIocpProactor.__repr__c C s || _ d S r7 )r2 )r r r r r! �set_loop� s zIocpProactor.set_loopNc C s | j s| �|� | j }g | _ |S r7 )r� rK )r �timeoutrl r r r! �select� s zIocpProactor.selectc C s | j �� }|�|� |S r7 )r2 r� r; )r �valuerO r r r! �_result� s zIocpProactor._resultr c C s~ | � |� t�t�}z4t|tj�r6|�|�� ||� n|�|�� |� W n t k rf | � d� Y S X dd� }| � |||�S )N� c S sR z |� � W S tk rL } z$|jtjtjfkr:t|j� �n� W 5 d }~X Y nX d S r7 �� getresultr1 rS rR ZERROR_NETNAME_DELETEDZERROR_OPERATION_ABORTED�ConnectionResetErrorr� �r� �keyr r4 r r r! � finish_recv� s � z&IocpProactor.recv.<locals>.finish_recv) �_register_with_iocprR � Overlappedrp � isinstance�socketZWSARecvr� ZReadFile�BrokenPipeErrorr� � _register�r �conn�nbytesrt r r� r r r! �recv� s zIocpProactor.recvc C s~ | � |� t�t�}z4t|tj�r6|�|�� ||� n|�|�� |� W n t k rf | � d� Y S X dd� }| � |||�S )Nr� c S sR z |� � W S tk rL } z$|jtjtjfkr:t|j� �n� W 5 d }~X Y nX d S r7 r� r� r r r! r� � s � z+IocpProactor.recv_into.<locals>.finish_recv) r� rR r� rp r� r� Z WSARecvIntor� Z ReadFileIntor� r� r� )r r� �bufrt r r� r r r! � recv_into� s zIocpProactor.recv_intoc C s` | � |� t�t�}z|�|�� ||� W n tk rH | �d� Y S X dd� }| �|||�S )N)r� Nc S sR z |� � W S tk rL } z$|jtjtjfkr:t|j� �n� W 5 d }~X Y nX d S r7 r� r� r r r! r� � s � z*IocpProactor.recvfrom.<locals>.finish_recv) r� rR r� rp Z WSARecvFromr� r� r� r� r� r r r! �recvfrom� s zIocpProactor.recvfromc C s> | � |� t�t�}|�|�� |||� dd� }| �|||�S )Nc S sR z |� � W S tk rL } z$|jtjtjfkr:t|j� �n� W 5 d }~X Y nX d S r7 r� r� r r r! � finish_send s � z(IocpProactor.sendto.<locals>.finish_send)r� rR r� rp Z WSASendTor� r� )r r� r� rt r r r� r r r! �sendto� s zIocpProactor.sendtoc C sZ | � |� t�t�}t|tj�r4|�|�� ||� n|�|�� |� dd� }| � |||�S )Nc S sR z |� � W S tk rL } z$|jtjtjfkr:t|j� �n� W 5 d }~X Y nX d S r7 r� r� r r r! r� s � z&IocpProactor.send.<locals>.finish_send) r� rR r� rp r� r� ZWSASendr� Z WriteFiler� )r r� r� rt r r� r r r! �send s zIocpProactor.sendc sv | � �� | ��j�� t�t�}|���� � �� � � �fdd�}dd� }| �|�|�}||� �}t j || j d� |S )Nc sD |� � t�d��� �}� �tjtj|� � � �� � � � � � � fS )Nz@P) r� �struct�packr� � setsockoptr� � SOL_SOCKETrR ZSO_UPDATE_ACCEPT_CONTEXT� settimeout� gettimeout� getpeername)r� r� r r� �r� �listenerr r! � finish_accept& s �z*IocpProactor.accept.<locals>.finish_acceptc � s4 z| I d H W n t jk r. |�� � Y nX d S r7 )r r� rw )r. r� r r r! � accept_coro/ s z(IocpProactor.accept.<locals>.accept_coror ) r� �_get_accept_socket�familyrR r� rp ZAcceptExr� r� r Z ensure_futurer2 )r r� r r� r� r. �coror r� r! �accept s zIocpProactor.acceptc s� � j tjkr4t�� �� |� | j�� }|�d � |S | � � � zt� � �� � j � W nB t k r� } z$|j tjkrt� � �� d dkr�� W 5 d }~X Y nX t�t�}|�� �� |� � fdd�}| �|� |�S )Nr r c s |� � � �tjtjd� � S rI )r� r� r� r� rR ZSO_UPDATE_CONNECT_CONTEXT�r� r� r �r� r r! �finish_connectR s �z,IocpProactor.connect.<locals>.finish_connect)�typer� � SOCK_DGRAMrR Z WSAConnectr� r2 r� r; r� Z BindLocalr� r1 rS �errnoZ WSAEINVAL� getsocknamer� rp Z ConnectExr� )r r� r' rO �er r� r r� r! �connect< s" zIocpProactor.connectc C sb | � |� t�t�}|d@ }|d? d@ }|�|�� t�|�� �|||dd� dd� }| �|||�S )Nr � r c S sR z |� � W S tk rL } z$|jtjtjfkr:t|j� �n� W 5 d }~X Y nX d S r7 r� r� r r r! �finish_sendfilee s � z.IocpProactor.sendfile.<locals>.finish_sendfile) r� rR r� rp Z TransmitFiler� �msvcrtZ get_osfhandler� ) r �sock�file�offset�countr Z offset_lowZ offset_highr� r r r! �sendfile[ s � zIocpProactor.sendfilec sJ | � � � t�t�}|�� �� �}|r0| �� �S � fdd�}| �|� |�S )Nc s |� � � S r7 )r� r� �rv r r! �finish_accept_pipe{ s z4IocpProactor.accept_pipe.<locals>.finish_accept_pipe)r� rR r� rp ZConnectNamedPiper� r� r� )r rv r Z connectedr� r r� r! r� p s zIocpProactor.accept_pipec � sr t }zt�|�}W qhW n0 tk rF } z|jtjkr6� W 5 d }~X Y nX t|d t�}t� |�I d H qt � |�S )N� ) �CONNECT_PIPE_INIT_DELAYrR Z ConnectPiper1 rS ZERROR_PIPE_BUSY�min�CONNECT_PIPE_MAX_DELAYr �sleepr rq )r r' �delayrG r4 r r r! r� � s zIocpProactor.connect_pipec C s | � ||d�S )z�Wait for a handle. 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Call this method when its future has been cancelled. The event can already be signalled (pending in the proactor event queue). It is also safe if the event is never signalled (because it was cancelled). 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