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selector_events.cpython-310.pyc
o �*�g� � @ s$ d Z dZddlZddlZddlZddlZddlZddlZddlZzddl Z W n e y1 dZ Y nw ddl m Z ddl m Z ddl mZ ddl mZ dd l mZ dd l mZ dd l mZ dd l mZ dd lmZ dd� ZG dd� de j�ZG dd� dejej�ZG dd� de�Z G dd� de�Z dS )z�Event loop using a selector and related classes. A selector is a "notify-when-ready" multiplexer. For a subclass which also includes support for signal handling, see the unix_events sub-module. )�BaseSelectorEventLoop� N� )� base_events)� constants)�events)�futures)� protocols)�sslproto)� transports)�trsock)�loggerc C s2 z| � |�}W n ty Y dS w t|j|@ �S �NF)�get_key�KeyError�boolr )�selector�fd�event�key� r �./usr/lib/python3.10/asyncio/selector_events.py�_test_selector_event s �r c s� e Zd ZdZdS� fdd� ZdSddd�dd�Z dSddddejd �d d �Z dTd d �Z � fdd�Z dd� Z dd� Z dd� Z dd� Zdd� Zdddejfdd �Zdddejfd d �Zddejfd d �Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zd1d2� Zd3d4� Z dSd5d6�Z d7d8� Z d9d:� Z d;d<� Z d=d>� Z!d?d@� Z"dAdB� Z#dCdD� Z$dSdEdF�Z%dGdH� Z&dIdJ� Z'dKdL� Z(dMdN� Z)dOdP� Z*dQdR� Z+� Z,S )Ur zJSelector event loop. See events.EventLoop for API specification. Nc sF t � �� |d u r t�� }t�d|jj� || _| � � t � � | _ d S )NzUsing selector: %s) �super�__init__� selectors�DefaultSelectorr �debug� __class__�__name__� _selector�_make_self_pipe�weakref�WeakValueDictionary� _transports)�selfr �r r r r 1 s z BaseSelectorEventLoop.__init__��extra�serverc C � t | |||||�S �N)�_SelectorSocketTransport)r$ �sock�protocol�waiterr' r( r r r �_make_socket_transport; s �z,BaseSelectorEventLoop._make_socket_transportF)� server_side�server_hostnamer' r( �ssl_handshake_timeoutc C s0 t j| |||||| d�} t| || ||d� | jS )N)r2 r& )r � SSLProtocolr+ �_app_transport) r$ �rawsockr- � sslcontextr. r0 r1 r' r( r2 � ssl_protocolr r r �_make_ssl_transport@ s ��z)BaseSelectorEventLoop._make_ssl_transportc C r) r* )�_SelectorDatagramTransport)r$ r, r- �addressr. r' r r r �_make_datagram_transportM s �z.BaseSelectorEventLoop._make_datagram_transportc sP | � � rtd��| �� rd S | �� t� �� | jd ur&| j�� d | _d S d S )Nz!Cannot close a running event loop)� is_running� RuntimeError� is_closed�_close_self_piper �closer �r$ r% r r r@ R s �zBaseSelectorEventLoop.closec C sB | � | j�� � | j�� d | _| j�� d | _| jd8 _d S )Nr )�_remove_reader�_ssock�filenor@ �_csock� _internal_fdsrA r r r r? ] s z&BaseSelectorEventLoop._close_self_pipec C sN t �� \| _| _| j�d� | j�d� | jd7 _| �| j�� | j� d S )NFr ) �socket� socketpairrC rE � setblockingrF � _add_readerrD �_read_from_selfrA r r r r e s z%BaseSelectorEventLoop._make_self_pipec C s d S r* r �r$ �datar r r �_process_self_datam � z(BaseSelectorEventLoop._process_self_datac C sN z| j �d�}|s W d S | �|� W n ty Y q ty% Y d S w q)NTi )rC �recvrN �InterruptedError�BlockingIOErrorrL r r r rK p s ��z%BaseSelectorEventLoop._read_from_selfc C sR | j }|d u r d S z|�d� W d S ty( | jr%tjddd� Y d S Y d S w )N� z3Fail to write a null byte into the self-pipe socketT��exc_info)rE �send�OSError�_debugr r )r$ �csockr r r �_write_to_self| s ���z$BaseSelectorEventLoop._write_to_self�d c C s" | � |�� | j||||||� d S r* )rJ rD �_accept_connection)r$ �protocol_factoryr, r6 r( �backlogr2 r r r �_start_serving� s �z$BaseSelectorEventLoop._start_servingc C s t |�D ]}}z|�� \}} | jrt�d|| |� |�d� W nO tttfy, Y d S t ym } z6| j t j t j t j t jfv rb| �d| t�|�d�� | �|�� � | �tj| j||||||� n� W Y d } ~ qd } ~ ww d| i} | �||| |||�} | �| � qd S )Nz#%r got a new connection from %r: %rFz&socket.accept() out of system resource)�message� exceptionrG �peername)�range�acceptrX r r rI rR rQ �ConnectionAbortedErrorrW �errno�EMFILE�ENFILE�ENOBUFS�ENOMEM�call_exception_handlerr �TransportSocketrB rD � call_laterr �ACCEPT_RETRY_DELAYr_ �_accept_connection2� create_task) r$ r] r, r6 r( r^ r2 �_�conn�addr�excr' rd r r r r\ � sH � ��� ��� � �z(BaseSelectorEventLoop._accept_connectionc � s� �d }d }z7|� }| � � } |r | j|||| d|||d�}n | j||| ||d�}z | I d H W W d S ty< |�� � w ttfyF � ty| } z+| jrqd| d�} |d ur]|| d< |d ure|| d< | �| � W Y d } ~ d S W Y d } ~ d S d } ~ ww )NT)r. r0 r' r( r2 )r. r' r( z3Error on transport creation for incoming connection)r` ra r- � transport) � create_futurer8 r/ � BaseExceptionr@ � SystemExit�KeyboardInterruptrX rk ) r$ r] rr r' r6 r( r2 r- ru r. rt �contextr r r ro � sJ ��� �����z)BaseSelectorEventLoop._accept_connection2c C s� |}t |t�s"zt|�� �}W n tttfy! td|���d �w z| j| }W n ty3 Y d S w |�� sBt d|�d|����d S )NzInvalid file object: zFile descriptor z is used by transport ) � isinstance�intrD �AttributeError� TypeError� ValueErrorr# r � is_closingr= )r$ r rD ru r r r �_ensure_fd_no_transport� s& � ����z-BaseSelectorEventLoop._ensure_fd_no_transportc G s� | � � t�||| d �}z| j�|�}W n ty) | j�|tj|d f� Y |S w |j|j }\}}| j� ||tjB ||f� |d urH|� � |S r* ) � _check_closedr �Handler r r �registerr � EVENT_READrM �modify�cancel� r$ r �callback�args�handler �mask�reader�writerr r r rJ � �" ���z!BaseSelectorEventLoop._add_readerc C s� | � � rdS z| j�|�}W n ty Y dS w |j|j}\}}|tj M }|s1| j�|� n | j� ||d |f� |d urE|� � dS dS )NFT) r> r r r r rM r r� � unregisterr� r� �r$ r r r� r� r� r r r rB s � z$BaseSelectorEventLoop._remove_readerc G s� | � � t�||| d �}z| j�|�}W n ty) | j�|tjd |f� Y |S w |j|j }\}}| j� ||tjB ||f� |d urH|� � |S r* ) r� r r� r r r r� r � EVENT_WRITErM r� r� r� r r r � _add_writer! r� z!BaseSelectorEventLoop._add_writerc C s� | � � rdS z| j�|�}W n ty Y dS w |j|j}\}}|tj M }|s1| j�|� n | j� |||df� |durE|� � dS dS )�Remove a writer callback.FNT) r> r r r r rM r r� r� r� r� r� r r r �_remove_writer1 s � z$BaseSelectorEventLoop._remove_writerc G �" | � |� | j||g|�R � dS )zAdd a reader callback.N)r� rJ �r$ r r� r� r r r � add_readerH � z BaseSelectorEventLoop.add_readerc C � | � |� | �|�S )zRemove a reader callback.)r� rB �r$ r r r r � remove_readerM � z#BaseSelectorEventLoop.remove_readerc G r� )zAdd a writer callback..N)r� r� r� r r r � add_writerR r� z BaseSelectorEventLoop.add_writerc C r� )r� )r� r� r� r r r � remove_writerW r� z#BaseSelectorEventLoop.remove_writerc � � �t �|� | jr|�� dkrtd��z|�|�W S ttfy$ Y nw | �� }|� � }| � |� | � || j |||�}|� tj| j||d�� |I dH S )z�Receive data from the socket. The return value is a bytes object representing the data received. The maximum amount of data to be received at once is specified by nbytes. r � the socket must be non-blocking�r� N)r �_check_ssl_socketrX � gettimeoutr rP rR rQ rv rD r� rJ � _sock_recv�add_done_callback� functools�partial�_sock_read_done)r$ r, �n�futr r� r r r � sock_recv\ s" � � � z BaseSelectorEventLoop.sock_recvc C �" |d u s|� � s| �|� d S d S r* )� cancelledr� �r$ r r� r� r r r r� r � �z%BaseSelectorEventLoop._sock_read_donec C � |� � rd S z|�|�}W n, ttfy Y d S ttfy" � ty9 } z |�|� W Y d }~d S d }~ww |�|� d S r* ) �donerP rR rQ rx ry rw � set_exception� set_result)r$ r� r, r� rM rt r r r r� v s ��z BaseSelectorEventLoop._sock_recvc � r� )z�Receive data from the socket. The received data is written into *buf* (a writable buffer). The return value is the number of bytes written. r r� r� N)r r� rX r� r � recv_intorR rQ rv rD r� rJ �_sock_recv_intor� r� r� r� )r$ r, �bufr� r r� r r r �sock_recv_into� s" � � � z$BaseSelectorEventLoop.sock_recv_intoc C r� r* ) r� r� rR rQ rx ry rw r� r� )r$ r� r, r� �nbytesrt r r r r� � s ��z%BaseSelectorEventLoop._sock_recv_intoc � s� �t �|� | jr|�� dkrtd��z|�|�}W n ttfy' d}Y nw |t|�kr0dS | � � }|� � }| � |� | � || j ||t|�|g�}|�tj| j||d�� |I dH S )a� Send data to the socket. The socket must be connected to a remote socket. This method continues to send data from data until either all data has been sent or an error occurs. None is returned on success. On error, an exception is raised, and there is no way to determine how much data, if any, was successfully processed by the receiving end of the connection. r r� Nr� )r r� rX r� r rV rR rQ �lenrv rD r� r� � _sock_sendall� memoryviewr� r� r� �_sock_write_done)r$ r, rM r� r� r r� r r r � sock_sendall� s* � � �� z"BaseSelectorEventLoop.sock_sendallc C s� |� � rd S |d }z |�||d � �}W n, ttfy! Y d S ttfy* � tyA } z |�|� W Y d }~d S d }~ww ||7 }|t|�krS|� d � d S ||d< d S )Nr ) r� rV rR rQ rx ry rw r� r� r� )r$ r� r, �view�pos�startr� rt r r r r� � s$ �� z#BaseSelectorEventLoop._sock_sendallc � s� �t �|� | jr|�� dkrtd��|jtjks"t jr;|jtj kr;| j ||j|j |j | d�I dH }|d \}}}}}| � � }| �|||� z|I dH W d}S d}w )zTConnect to a remote socket at address. This method is a coroutine. r r� )�family�type�proto�loopN)r r� rX r� r r� rG �AF_INET� _HAS_IPv6�AF_INET6�_ensure_resolvedr� r� rv � _sock_connect)r$ r, r: �resolvedrq r� r r r � sock_connect� s$ � � � z"BaseSelectorEventLoop.sock_connectc C s� |� � }zaz|�|� W nE ttfy2 | �|� | �|| j|||�}|�tj | j ||d�� Y n* t t fy; � t yQ } z |�|� W Y d }~nd }~ww |�d � W d }d S W d }d S W d }d S d }w )Nr� )rD �connectrR rQ r� r� �_sock_connect_cbr� r� r� r� rx ry rw r� r� )r$ r� r, r: r r� rt r r r r� � s. ���� � �z#BaseSelectorEventLoop._sock_connectc C r� r* )r� r� r� r r r r� r� z&BaseSelectorEventLoop._sock_write_donec C s� |� � rd S zUz|�tjtj�}|dkr t|d|� ���W n* ttfy( Y n* tt fy1 � t yG } z |� |� W Y d }~nd }~ww |� d � W d }d S W d }d S W d }d S d }w )Nr zConnect call failed ) r� � getsockoptrG � SOL_SOCKET�SO_ERRORrW rR rQ rx ry rw r� r� )r$ r� r, r: �errrt r r r r� s* ��� ��z&BaseSelectorEventLoop._sock_connect_cbc � sD �t �|� | jr|�� dkrtd��| �� }| �||� |I dH S )aW Accept a connection. The socket must be bound to an address and listening for connections. The return value is a pair (conn, address) where conn is a new socket object usable to send and receive data on the connection, and address is the address bound to the socket on the other end of the connection. r r� N)r r� rX r� r rv � _sock_accept)r$ r, r� r r r � sock_accept* s � z!BaseSelectorEventLoop.sock_acceptc C s� |� � }z |�� \}}|�d� W nF ttfy7 | �|� | �|| j||�}|�t j | j ||d�� Y d S t t fy@ � tyW } z |�|� W Y d }~d S d }~ww |�||f� d S )NFr� )rD rd rI rR rQ r� rJ r� r� r� r� r� rx ry rw r� r� )r$ r� r, r rr r: r� rt r r r r� 9 s" ���z"BaseSelectorEventLoop._sock_acceptc � s� �| j |j= |�� }|�� |�� I d H z | j|j|||dd�I d H W |�� |r.|�� || j |j< S |�� |r?|�� || j |j< w )NF)�fallback) r# �_sock_fd� is_reading� pause_reading�_make_empty_waiter� sock_sendfile�_sock�_reset_empty_waiter�resume_reading)r$ �transp�file�offset�countr� r r r �_sendfile_nativeJ s" � ��z&BaseSelectorEventLoop._sendfile_nativec C s� |D ];\}}|j |j}\}}|tj@ r&|d ur&|jr!| �|� n| �|� |tj@ r=|d ur=|jr8| �|� q| �|� qd S r* ) �fileobjrM r r� � _cancelledrB � _add_callbackr� r� )r$ � event_listr r� r� r� r� r r r �_process_eventsX s ��z%BaseSelectorEventLoop._process_eventsc C s | � |�� � |�� d S r* )rB rD r@ )r$ r, r r r � _stop_servingf s z#BaseSelectorEventLoop._stop_servingr* �NNN)-r � __module__� __qualname__�__doc__r r/ r �SSL_HANDSHAKE_TIMEOUTr8 r; r@ r? r rN rK rZ r_ r\ ro r� rJ rB r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� � __classcell__r r r% r r + sl �� � � � �. �) r c s� e Zd ZdZeZdZd � fdd� Zdd� Zdd� Z d d � Z d d � Z d d� Z dd� Z ejfdd�Zd dd�Zdd� Zdd� Zdd� Zd d � Z� ZS ) �_SelectorTransporti Nc s� t � �||� t�|�| jd< z |�� | jd< W n ty& d | jd< Y nw d| jvrEz |�� | jd< W n tj yD d | jd< Y nw || _ |� � | _ d| _ | �|� || _| �� | _d| _d| _| jd urm| j�� | |j| j < d S )NrG �socknamerb Fr )r r r rl �_extra� getsocknamerW � getpeernamerG �errorr� rD r� �_protocol_connected� set_protocol�_server�_buffer_factory�_buffer� _conn_lost�_closing�_attachr# )r$ r� r, r- r' r( r% r r r w s0 � � z_SelectorTransport.__init__c C s� | j jg}| jd u r|�d� n| jr|�d� |�d| j� �� | jd urc| j�� sct| jj | jt j �}|r=|�d� n|�d� t| jj | jt j �}|rQd}nd}| � � }|�d|� d |� d �� d �d �|��S ) N�closed�closingzfd=z read=pollingz read=idle�polling�idlezwrite=<z , bufsize=�>z<{}>� )r r r� �appendr� r� �_loopr> r r r r� r� �get_write_buffer_size�format�join)r$ �infor� �state�bufsizer r r �__repr__� s. � �z_SelectorTransport.__repr__c C s | � d � d S r* )� _force_closerA r r r �abort� s z_SelectorTransport.abortc C s || _ d| _d S �NT)� _protocolr� �r$ r- r r r r� � s z _SelectorTransport.set_protocolc C � | j S r* )r rA r r r � get_protocol� � z _SelectorTransport.get_protocolc C r r* )r� rA r r r r� � r z _SelectorTransport.is_closingc C sX | j rd S d| _ | j�| j� | js*| jd7 _| j�| j� | j�| jd � d S d S �NTr ) r� r rB r� r� r� r� � call_soon�_call_connection_lostrA r r r r@ � s �z_SelectorTransport.closec C s0 | j d ur|d| ��t| d� | j �� d S d S )Nzunclosed transport )�source)r� �ResourceWarningr@ )r$ �_warnr r r �__del__� s �z_SelectorTransport.__del__�Fatal error on transportc C sN t |t�r| j�� rtjd| |dd� n | j�||| | jd�� | �|� d S )Nz%r: %sTrT )r` ra ru r- ) r{ rW r � get_debugr r rk r r )r$ rt r` r r r � _fatal_error� s ��z _SelectorTransport._fatal_errorc C sd | j rd S | jr| j�� | j�| j� | js!d| _| j�| j� | j d7 _ | j�| j |� d S r ) r� r� �clearr r� r� r� rB r r �r$ rt r r r r � s z _SelectorTransport._force_closec C s� z*| j r | j�|� W | j�� d | _d | _d | _| j}|d ur)|�� d | _d S d S | j�� d | _d | _d | _| j}|d urG|�� d | _w r* )r� r �connection_lostr� r@ r r� �_detach)r$ rt r( r r r r � s* � � �z(_SelectorTransport._call_connection_lostc C s t | j�S r* )r� r� rA r r r r � � z(_SelectorTransport.get_write_buffer_sizec G s$ | j rd S | jj||g|�R � d S r* )r� r rJ r� r r r rJ � s z _SelectorTransport._add_reader)NN)r )r r� r� �max_size� bytearrayr� r� r r r r� r r� r@ �warnings�warnr r r r r rJ r� r r r% r r� k s" r� c s� e Zd ZdZejjZ d#� fdd� Z� fdd�Z dd� Z d d � Z d d � Z d d� Z dd� Zdd� Zdd� Zdd� Zdd� Zdd� Zdd � Z� fd d �Zd d � Zd!d"� Z� ZS )$r+ TNc s� d | _ t� �|||||� d| _d| _d | _t�| j� | j � | j j | � | j � | j | j| j� |d ur?| j � tj|d � d S d S r )�_read_ready_cbr r �_eof�_paused� _empty_waiterr � _set_nodelayr� r r r �connection_maderJ r� � _read_readyr � _set_result_unless_cancelled)r$ r� r, r- r. r' r( r% r r r s � ��z!_SelectorSocketTransport.__init__c s. t |tj�r | j| _n| j| _t� �|� d S r* )r{ r �BufferedProtocol�_read_ready__get_bufferr' �_read_ready__data_receivedr r� r r% r r r� s z%_SelectorSocketTransport.set_protocolc C s | j o| j S r* )r) r� rA r r r r� s z#_SelectorSocketTransport.is_readingc C sB | j s| jrd S d| _| j�| j� | j�� r t�d| � d S d S )NTz%r pauses reading)r� r) r rB r� r r r rA r r r r� " s �z&_SelectorSocketTransport.pause_readingc C sD | j s| jsd S d| _| �| j| j� | j�� r t�d| � d S d S )NFz%r resumes reading) r� r) rJ r� r- r r r r rA r r r r� * s �z'_SelectorSocketTransport.resume_readingc C s | � � d S r* )r' rA r r r r- 2 s z$_SelectorSocketTransport._read_readyc C sD | j rd S z| j�d�}t|�std��W n" ttfy � ty7 } z | �|d� W Y d }~d S d }~ww z| j � |�}W n- t t fyL Y d S ttfyU � tym } z | �|d� W Y d }~d S d }~ww |sv| � � d S z | j�|� W d S ttfy� � ty� } z | �|d� W Y d }~d S d }~ww )N���z%get_buffer() returned an empty bufferz/Fatal error: protocol.get_buffer() call failed.�$Fatal read error on socket transportz3Fatal error: protocol.buffer_updated() call failed.)r� r � get_bufferr� r= rx ry rw r r� r� rR rQ �_read_ready__on_eof�buffer_updated)r$ r� rt r� r r r r0 5 sP ���� �����z0_SelectorSocketTransport._read_ready__get_bufferc C s� | j rd S z | j�| j�}W n- ttfy Y d S ttfy# � ty; } z | � |d� W Y d }~d S d }~ww |sD| � � d S z | j � |� W d S ttfyW � tyo } z | � |d� W Y d }~d S d }~ww )Nr3 z2Fatal error: protocol.data_received() call failed.) r� r� rP r# rR rQ rx ry rw r r5 r � data_received)r$ rM rt r r r r1 Z s4 �����z3_SelectorSocketTransport._read_ready__data_receivedc C s� | j �� r t�d| � z| j�� }W n" ttfy � ty4 } z | � |d� W Y d }~d S d }~ww |r@| j � | j � d S | � � d S )Nz%r received EOFz1Fatal error: protocol.eof_received() call failed.) r r r r r � eof_receivedrx ry rw r rB r� r@ )r$ � keep_openrt r r r r5 s s ��� z,_SelectorSocketTransport._read_ready__on_eofc C s( t |tttf�stdt|�j����| jrtd��| j d ur"td��|s&d S | j r=| j t j kr4t �d� | j d7 _ d S | js�z| j�|�}W n, ttfyS Y n, ttfy\ � tyt } z | �|d� W Y d }~d S d }~ww ||d � }|sd S | j�| j| j� | j� |� | � � d S )N�/data argument must be a bytes-like object, not z%Cannot call write() after write_eof()z(unable to write; sendfile is in progress� socket.send() raised exception.r �%Fatal write error on socket transport) r{ �bytesr$ r� r~ r� r r( r= r* r� r �!LOG_THRESHOLD_FOR_CONNLOST_WRITESr �warningr� r� rV rR rQ rx ry rw r r r� r� � _write_ready�extend�_maybe_pause_protocol)r$ rM r� rt r r r �write� sB � �� z _SelectorSocketTransport.writec C s8 | j sJ d��| jr d S z | j�| j �}W nK ttfy! Y d S ttfy* � ty` } z+| j � | j � | j � � | � |d� | jd urU| j�|� W Y d }~d S W Y d }~d S d }~ww |ri| j d |�= | �� | j s�| j � | j � | jd ur�| j�d � | jr�| �d � d S | jr�| j�tj� d S d S d S )NzData should not be emptyr< )r� r� r� rV rR rQ rx ry rw r r� r� r r r* r� �_maybe_resume_protocolr� r� r r( �shutdownrG �SHUT_WR)r$ r� rt r r r r@ � s> ��� �z%_SelectorSocketTransport._write_readyc C s2 | j s| jrd S d| _| js| j�tj� d S d S r )r� r( r� r� rE rG rF rA r r r � write_eof� s �z"_SelectorSocketTransport.write_eofc C s dS r r rA r r r � can_write_eof� rO z&_SelectorSocketTransport.can_write_eofc s. t � �|� | jd ur| j�td�� d S d S )Nz Connection is closed by peer)r r r* r� �ConnectionErrorr r% r r r � s ��z._SelectorSocketTransport._call_connection_lostc C s6 | j d ur td��| j�� | _ | js| j �d � | j S )NzEmpty waiter is already set)r* r= r rv r� r� rA r r r r� � s z+_SelectorSocketTransport._make_empty_waiterc C s d | _ d S r* )r* rA r r r r� � r" z,_SelectorSocketTransport._reset_empty_waiterr� )r r� r� �_start_tls_compatibler � _SendfileMode� TRY_NATIVE�_sendfile_compatibler r� r� r� r� r- r0 r1 r5 rC r@ rG rH r r� r� r� r r r% r r+ � s* � %' r+ c sJ e Zd ZejZ d � fdd� Zdd� Zdd� Zd dd �Z d d � Z � Z S )r9 Nc sb t � �||||� || _| j�| jj| � | j�| j| j| j � |d ur/| j�t j |d � d S d S r* ) r r �_addressr r r r, rJ r� r- r r. )r$ r� r, r- r: r. r' r% r r r � s � ��z#_SelectorDatagramTransport.__init__c C s t dd� | jD ��S )Nc s s � | ] \}}t |�V qd S r* )r� )�.0rM rq r r r � <genexpr>� s � zC_SelectorDatagramTransport.get_write_buffer_size.<locals>.<genexpr>)�sumr� rA r r r r � s z0_SelectorDatagramTransport.get_write_buffer_sizec C s� | j rd S z | j�| j�\}}W nE ttfy Y d S ty4 } z | j�|� W Y d }~d S d }~w t t fy= � t yU } z | � |d� W Y d }~d S d }~ww | j� ||� d S )Nz&Fatal read error on datagram transport)r� r� �recvfromr# rR rQ rW r �error_receivedrx ry rw r �datagram_received�r$ rM rs rt r r r r- � s ���z&_SelectorDatagramTransport._read_readyc C s| t |tttf�stdt|�j����|sd S | jr+|d | jfvr(td| j� ���| j}| j rE| jrE| j t j kr<t � d� | j d7 _ d S | js�z| jd rW| j�|� W d S | j�||� W d S ttfyt | j�| j| j� Y n: ty� } z | j�|� W Y d }~d S d }~w t t fy� � t y� } z | � |d� W Y d }~d S d }~ww | j� t|�|f� | �!� d S )Nr: z!Invalid address: must be None or r; r rb �'Fatal write error on datagram transport)"r{ r= r$ r� r~ r� r rN r r� r r> r r? r� r� r� rV �sendtorR rQ r r� r� � _sendto_readyrW r rS rx ry rw r r rB rU r r r rW sR � � � ���� z!_SelectorDatagramTransport.sendtoc C s | j ro| j �� \}}z| jd r| j�|� n| j�||� W nL ttfy2 | j �||f� Y n= t yJ } z | j � |� W Y d }~d S d }~w t t fyS � tyk } z | �|d� W Y d }~d S d }~ww | j s| �� | j s�| j�| j� | jr�| �d � d S d S d S )Nrb rV )r� �popleftr� r� rV rW rR rQ � appendleftrW r rS rx ry rw r rD r r� r� r� r rU r r r rX 8 s> � ������z(_SelectorDatagramTransport._sendto_readyr� r* ) r r� r� � collections�dequer� r r r- rW rX r� r r r% r r9 � s � +r9 ) r� �__all__r[ rf r� r rG r% r! �ssl� ImportError� r r r r r r r r �logr r � BaseEventLoopr �_FlowControlMixin� Transportr� r+ r9 r r r r �<module> sH � D� o