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selector_events.cpython-39.pyc
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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 s6 z| � |�}W n ty" Y dS 0 t|j|@ �S d S �NF)�get_key�KeyError�boolr )�selector�fd�event�key� r �//usr/lib64/python3.9/asyncio/selector_events.py�_test_selector_event s r c s� e Zd ZdZdS� fdd� ZdTddd�dd�ZdUddddejd �d d �ZdVd d �Z � fdd�Z dd� Z dd� Z dd� Z dd� Zdd� Zdddejfdd �Zdddejfd d �Zddejfd d �Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zd1d2� Zd3d4� Z dWd5d6�Z d7d8� Z d9d:� Z d;d<� Z d=d>� Z!d?d@� Z"dAdB� Z#dCdD� Z$dXdEdF�Z%dGdH� Z&dIdJ� Z'dKdL� Z(dMdN� Z)dOdP� Z*dQdR� Z+� Z,S )Yr zJSelector event loop. See events.EventLoop for API specification. Nc sF t � �� |d u rt�� }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 s 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)r1 r& )r Z SSLProtocolr* Z_app_transport) r$ Zrawsockr, � sslcontextr- r/ r0 r' r( r1 Z ssl_protocolr r r �_make_ssl_transport@ s ��z)BaseSelectorEventLoop._make_ssl_transportc C s t | |||||�S r) )�_SelectorDatagramTransport)r$ r+ r, �addressr- r' r r r �_make_datagram_transportM s �z.BaseSelectorEventLoop._make_datagram_transportc sL | � � rtd��| �� r d S | �� t� �� | jd urH| j�� d | _d S )Nz!Cannot close a running event loop)Z 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_fdsr; r r r r9 ] s z&BaseSelectorEventLoop._close_self_pipec C sN t �� \| _| _| j�d� | j�d� | jd7 _| �| j�� | j� d S )NFr ) �socket� socketpairr= r? � setblockingr@ � _add_readerr> �_read_from_selfr; r r r r e s z%BaseSelectorEventLoop._make_self_pipec C s d S r) r �r$ �datar r r �_process_self_datam s z(BaseSelectorEventLoop._process_self_datac C sT z"| j �d�}|sW qP| �|� W q ty8 Y q Y q tyL Y qPY q 0 q d S )Ni )r= �recvrH �InterruptedError�BlockingIOErrorrF r r r rE p s z%BaseSelectorEventLoop._read_from_selfc C sL | j }|d u rd S z|�d� W n& tyF | jrBtjddd� Y n0 d S )N� z3Fail to write a null byte into the self-pipe socketT��exc_info)r? �send�OSError�_debugr r )r$ �csockr r r �_write_to_self| s �z$BaseSelectorEventLoop._write_to_self�d c C s" | � |�� | j||||||� d S r) )rD r> �_accept_connection)r$ �protocol_factoryr+ r2 r( �backlogr1 r r r �_start_serving� s �z$BaseSelectorEventLoop._start_servingc C s t |�D ]�}z0|�� \}} | jr0t�d|| |� |�d� W n� tttfyX Y d S t y� } zl| j t j t j t j t jfv r�| �d| t�|�d�� | �|�� � | �tj| j||||||� n� W Y d } ~ qd } ~ 0 0 d| i} | �||| |||�} | �| � qd S )Nz#%r got a new connection from %r: %rFz&socket.accept() out of system resource)�message� exceptionrA �peername)�range�acceptrQ r r rC rK rJ �ConnectionAbortedErrorrP �errnoZEMFILEZENFILEZENOBUFSZENOMEM�call_exception_handlerr �TransportSocketr< r> Z call_laterr ZACCEPT_RETRY_DELAYrX �_accept_connection2Z create_task) r$ rV r+ r2 r( rW r1 �_�conn�addr�excr' r] r r r rU � s@ � ��� �z(BaseSelectorEventLoop._accept_connectionc � s� d }d }zr|� }| � � } |r8| j|||| d|||d�}n| j||| ||d�}z| I d H W n tyv |�� � Y n0 W nt ttfy� � Y n^ ty� } zF| jr�d| d�} |d ur�|| d< |d ur�|| d< | �| � W Y d } ~ n d } ~ 0 0 d S )NT)r- r/ r' r( r1 )r- r' r( z3Error on transport creation for incoming connection)rY rZ r, � transport) � create_futurer3 r. � BaseExceptionr: � SystemExit�KeyboardInterruptrQ r` ) r$ rV rd r' r2 r( r1 r, rg r- rf �contextr r r rb � s@ �� �z)BaseSelectorEventLoop._accept_connection2c C s� |}t |t�sHzt|�� �}W n( tttfyF td|���d �Y n0 z| j| }W n tyh Y n 0 |�� s�t d|�d|����d S )NzInvalid file object: zFile descriptor z is used by transport ) � isinstance�intr> �AttributeError� TypeError� ValueErrorr# r � is_closingr7 )r$ r r> rg r r r �_ensure_fd_no_transport� s ��z-BaseSelectorEventLoop._ensure_fd_no_transportc G s� | � � t�||| d �}z| j�|�}W n( tyP | j�|tj|d f� Y n>0 |j|j }\}}| j� ||tjB ||f� |d ur�|� � |S r) ) � _check_closedr �Handler r r �registerr � EVENT_READrG �modify�cancel� r$ r �callback�args�handler �mask�reader�writerr r r rD � s � �z!BaseSelectorEventLoop._add_readerc C s� | � � r dS z| j�|�}W n ty0 Y dS 0 |j|j }\}}|tj M }|sb| j�|� n| j� ||d |f� |d ur�|� � dS dS d S )NFT) r8 r r r r rG r rw � unregisterrx ry �r$ r r r~ r r� r r r r< s z$BaseSelectorEventLoop._remove_readerc G s� | � � t�||| d �}z| j�|�}W n( tyP | j�|tjd |f� Y n>0 |j|j }\}}| j� ||tjB ||f� |d ur�|� � |S r) ) rt r ru r r r rv r � EVENT_WRITErG rx ry rz r r r � _add_writer! s � �z!BaseSelectorEventLoop._add_writerc C s� | � � r dS z| j�|�}W n ty0 Y dS 0 |j|j }\}}|tj M }|sb| j�|� n| j� |||df� |dur�|� � dS dS dS )�Remove a writer callback.FNT) r8 r r r r rG r r� r� rx ry r� r r r �_remove_writer1 s z$BaseSelectorEventLoop._remove_writerc G s" | � |� | j||g|�R � dS )zAdd a reader callback.N)rs rD �r$ r r{ r| r r r � add_readerH s z BaseSelectorEventLoop.add_readerc C s | � |� | �|�S )zRemove a reader callback.)rs r< �r$ r r r r � remove_readerM s z#BaseSelectorEventLoop.remove_readerc G s" | � |� | j||g|�R � dS )zAdd a writer callback..N)rs r� r� r r r � add_writerR s z BaseSelectorEventLoop.add_writerc C s | � |� | �|�S )r� )rs r� r� r r r � remove_writerW s z#BaseSelectorEventLoop.remove_writerc � s� t �|� | jr$|�� dkr$td��z |�|�W S ttfyF Y n0 | �� }|� � }| � |� | � || 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_socketrQ � gettimeoutrq rI rK rJ rh r> rs rD � _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 s |d u s|� � s| �|� d S r) )� cancelledr� �r$ r r� r} r r r r� r s z%BaseSelectorEventLoop._sock_read_donec C s� |� � r d S z|�|�}W nZ ttfy2 Y d S ttfyH � Y n8 tyt } z|�|� W Y d }~nd }~0 0 |�|� d S r) ) �donerI rK rJ rj rk ri � set_exception� set_result)r$ r� r+ r� rG rf r r r r� v s z BaseSelectorEventLoop._sock_recvc � s� t �|� | jr$|�� dkr$td��z |�|�W S ttfyF Y n0 | �� }|� � }| � |� | � || j |||�}|� tj| j||d�� |I dH S )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� rQ r� rq � recv_intorK rJ rh r> rs rD �_sock_recv_intor� r� r� r� )r$ r+ �bufr� r r} r r r �sock_recv_into� s �z$BaseSelectorEventLoop.sock_recv_intoc C s� |� � r d S z|�|�}W nZ ttfy2 Y d S ttfyH � Y n8 tyt } z|�|� W Y d }~nd }~0 0 |�|� d S r) ) r� r� rK rJ rj rk ri r� r� )r$ r� r+ r� �nbytesrf r r r r� � s z%BaseSelectorEventLoop._sock_recv_intoc � s� t �|� | jr$|�� dkr$td��z|�|�}W n ttfyL d}Y n0 |t|�kr^dS | � � }|� � }| � |� | � || 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� rQ r� rq rO rK rJ �lenrh r> rs r� � _sock_sendall� memoryviewr� r� r� �_sock_write_done)r$ r+ rG r� r� r r} r r r � sock_sendall� s& ��z"BaseSelectorEventLoop.sock_sendallc C s� |� � r d S |d }z|�||d � �}W n\ ttfyB Y d S ttfyX � Y n0 ty� } z|�|� W Y d }~d S d }~0 0 ||7 }|t|�kr�|� d � n||d< d S )Nr ) r� rO rK rJ rj rk ri r� r� r� )r$ r� r+ �view�pos�startr� rf r r r r� � s z#BaseSelectorEventLoop._sock_sendallc � s� t �|� | jr$|�� dkr$td��|jtjksBt jrt|jtj krt| j ||j|j |j | d�I dH }|d \}}}}}| � � }| �|||� |I dH S )zTConnect to a remote socket at address. This method is a coroutine. r r� )�family�type�proto�loopN)r r� rQ r� rq r� rA �AF_INETZ _HAS_IPv6�AF_INET6Z_ensure_resolvedr� r� rh � _sock_connect)r$ r+ r5 Zresolvedrc r� r r r � sock_connect� s � �� z"BaseSelectorEventLoop.sock_connectc C s� |� � }z|�|� W n� ttfyb | �|� | �|| j|||�}|�tj | j ||d�� Y nN t t fyx � Y n8 t y� } z|�|� W Y d }~nd }~0 0 |�d � d S )Nr� )r> �connectrK rJ rs r� �_sock_connect_cbr� r� r� r� rj rk ri r� r� )r$ r� r+ r5 r r} rf r r r r� � s �� z#BaseSelectorEventLoop._sock_connectc C s |d u s|� � s| �|� d S r) )r� r� r� r r r r� s z&BaseSelectorEventLoop._sock_write_donec C s� |� � r d S z,|�tjtj�}|dkr6t|d|� ���W nX ttfyN Y nN tt fyd � Y n8 t y� } z|� |� W Y d }~nd }~0 0 |� d � d S )Nr zConnect call failed ) r� � getsockoptrA � SOL_SOCKET�SO_ERRORrP rK rJ rj rk ri r� r� )r$ r� r+ r5 �errrf r r r r� s z&BaseSelectorEventLoop._sock_connect_cbc � sB t �|� | jr$|�� dkr$td��| �� }| �||� |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� rQ r� rq rh � _sock_accept)r$ r+ r� r r r � sock_accept" s z!BaseSelectorEventLoop.sock_acceptc C s� |� � }z|�� \}}|�d� W n� ttfyl | �|� | �|| j||�}|�t j | j ||d�� Y nR t t fy� � Y n< ty� } z|�|� W Y d }~nd }~0 0 |�||f� d S )NFr� )r> r] rC rK rJ rs rD r� r� r� r� r� rj rk ri r� r� )r$ r� r+ r rd r5 r} rf r r r r� 1 s � z"BaseSelectorEventLoop._sock_acceptc � s� | j |j= |�� }|�� |�� I d H zL| j|j|||dd�I d H W |�� |rZ|�� || j |j< S || j |j< n"|�� |r�|�� || j |j< 0 d S )NF)�fallback) r# �_sock_fd� is_reading� pause_reading�_make_empty_waiterZ sock_sendfile�_sock�_reset_empty_waiter�resume_reading)r$ Ztransp�file�offset�countr� r r r �_sendfile_nativeB s* � � �z&BaseSelectorEventLoop._sendfile_nativec C s� |D ]v\}}|j |j }\}}|tj@ rL|d urL|jrB| �|� n | �|� |tj@ r|d ur|jrp| �|� q| �|� qd S r) ) �fileobjrG r rw Z _cancelledr< Z _add_callbackr� r� )r$ Z event_listr r~ r� r r� r r r �_process_eventsP s z%BaseSelectorEventLoop._process_eventsc C s | � |�� � |�� d S r) )r< r> r: )r$ r+ r r r � _stop_serving^ s z#BaseSelectorEventLoop._stop_serving)N)N)N)NNN)N)N)-r � __module__� __qualname__�__doc__r r. r ZSSL_HANDSHAKE_TIMEOUTr3 r6 r: r9 r rH rE rS rX rU rb rs rD r< 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 + sj � �� � � � .� ) 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 tyL d | jd< Y n0 d| jvr�z|�� | jd< W n tj y� d | jd< Y n0 || _ |� � | _ d| _ | �|� || _| �� | _d| _d| _| jd ur�| j�� | |j| j < d S )NrA Zsocknamer[ Fr )r r r ra �_extra� getsocknamerP � getpeernamerA �errorr� r> r� �_protocol_connected� set_protocol�_server�_buffer_factory�_buffer� _conn_lost�_closingZ_attachr# )r$ r� r+ r, r' r( r% r r r o s, z_SelectorTransport.__init__c C s� | j jg}| jd u r |�d� n| jr0|�d� |�d| j� �� | jd ur�| j�� s�t| jj | jt j �}|rz|�d� n |�d� t| jj | jt j �}|r�d}nd}| � � }|�d|� d |� d �� d �d �|��S ) N�closed�closingzfd=z read=pollingz read=idle�pollingZidlezwrite=<z , bufsize=�>z<{}>� )r r r� �appendr� r� �_loopr8 r r r rw 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_closer; 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 s | j S r) )r� r; r r r � get_protocol� s z _SelectorTransport.get_protocolc C s | j S r) )r� r; r r r rr � s z _SelectorTransport.is_closingc C sT | j r d S d| _ | j�| j� | jsP| jd7 _| j�| j� | j�| jd � d S �NTr ) r� r� r< r� r� r� r� � call_soon�_call_connection_lostr; r r r r: � s z_SelectorTransport.closec C s, | j d ur(|d| ��t| d� | j �� 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�� r@tjd| |dd� n| j�||| | jd�� | �|� d S )Nz%r: %sTrM )rY rZ rg r, ) rm rP r� � get_debugr r r` r� r� )r$ rf rY r r r � _fatal_error� s �z _SelectorTransport._fatal_errorc C sd | j r d S | jr(| j�� | j�| j� | jsBd| _| j�| j� | j d7 _ | j�| j |� d S r� ) r� r� �clearr� r� r� r� r< r� r� �r$ rf r r r r� � s z _SelectorTransport._force_closec C s� zN| j r| j�|� W | j�� d | _d | _d | _| j}|d ur�|�� d | _n:| j�� d | _d | _d | _| j}|d ur�|�� d | _0 d S r) )r� r� Zconnection_lostr� r: r� r� Z_detach)r$ rf r( r r r r� � s& � z(_SelectorTransport._call_connection_lostc C s t | j�S r) )r� r� r; r r r r� � s z(_SelectorTransport.get_write_buffer_sizec G s$ | j r d S | jj||g|�R � d S r) )r� r� rD r� r r r rD � s z _SelectorTransport._add_reader)NN)r� )r r� r� �max_size� bytearrayr� r� r r� r� r� r� rr r: �warnings�warnr� r� r� r� r� rD r� r r r% r r� c s r� c s� e Zd ZdZejjZd#� 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 )$r* TNc s~ d | _ t� �|||||� d| _d| _d | _t�| j� | j � | j j | � | j � | j | j| j� |d urz| j � tj|d � d S r )�_read_ready_cbr r �_eof�_paused� _empty_waiterr Z _set_nodelayr� r� r� r� �connection_maderD r� � _read_readyr � _set_result_unless_cancelled)r$ 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) )rm r ZBufferedProtocol�_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� r; r r r r� s z#_SelectorSocketTransport.is_readingc C s> | j s | jrd S d| _| j�| j� | j�� r:t�d| � d S )NTz%r pauses reading)r� r r� r< r� r� r r r; r r r r� s z&_SelectorSocketTransport.pause_readingc C s@ | j s | jsd S d| _| �| j| j� | j�� r<t�d| � d S )NFz%r resumes reading) r� r rD r� r r� r� r r r; r r r r� " s z'_SelectorSocketTransport.resume_readingc C s | � � d S r) )r� r; r r r r * s z$_SelectorSocketTransport._read_readyc C sV | j r d S z | j�d�}t|�s(td��W nH ttfyB � Y n2 tyr } z| �|d� W Y d }~d S d }~0 0 z| j � |�}W n^ t t fy� Y d S ttfy� � Y n2 ty� } z| �|d� W Y d }~d S d }~0 0 |� s�| � � d S z| j�|� W nJ ttf�y � Y n2 t�yP } z| �|d� W Y d }~n d }~0 0 d S )N���z%get_buffer() returned an empty bufferz/Fatal error: protocol.get_buffer() call failed.�$Fatal read error on socket transportz3Fatal error: protocol.buffer_updated() call failed.)r� r� Z get_bufferr� r7 rj rk ri r� r� r� rK rJ �_read_ready__on_eofZbuffer_updated)r$ r� rf r� r r r r - sB � �z0_SelectorSocketTransport._read_ready__get_bufferc C s� | j r d S z| j�| j�}W n^ ttfy4 Y d S ttfyJ � Y n2 tyz } z| � |d� W Y d }~d S d }~0 0 |s�| � � d S z| j � |� W nF ttfy� � Y n0 ty� } z| � |d� W Y d }~n d }~0 0 d S )Nr z2Fatal error: protocol.data_received() call failed.) r� r� rI r� rK rJ rj rk ri r� r r� Z data_received)r$ rG rf r r r r R s, �z3_SelectorSocketTransport._read_ready__data_receivedc C s� | j �� rt�d| � z| j�� }W nH ttfy< � Y n2 tyl } z| � |d� W Y d }~d S d }~0 0 |r�| j � | j � n| � � d S )Nz%r received EOFz1Fatal error: protocol.eof_received() call failed.) r� r� r r r� Z eof_receivedrj rk ri r� r< r� r: )r$ Z keep_openrf r r r r k s �z,_SelectorSocketTransport._read_ready__on_eofc C s0 t |tttf�s$tdt|�j����| jr2td��| j d urDtd��|sLd S | j rz| j t j krht �d� | j d7 _ d S | j�sz| j�|�}W n\ ttfy� Y n^ ttfy� � Y nH ty� } z| �|d� W Y d }~d S d }~0 0 ||d � }|�sd S | j�| j| j� | j� |� | � � d S )N�/data argument must be a bytes-like object, not z%Cannot call write() after write_eof()z(unable to write; sendfile is in progress� socket.send() raised exception.r �%Fatal write error on socket transport) rm �bytesr� r� rp r� r r� r7 r r� r �!LOG_THRESHOLD_FOR_CONNLOST_WRITESr �warningr� r� rO rK rJ rj rk ri r� r� r� r� � _write_ready�extend�_maybe_pause_protocol)r$ rG r� rf r r r �write� s> � z _SelectorSocketTransport.writec C s& | j sJ d��| jrd S z| j�| j �}W n� ttfy@ Y n� ttfyV � Y n� ty� } zF| j � | j � | j � � | � |d� | jd ur�| j�|� W Y d }~nxd }~0 0 |r�| j d |�= | �� | j �s"| j � | j � | jd ur�| j�d � | j�r | �d � n| j�r"| j�tj� d S )NzData should not be emptyr )r� r� r� rO rK rJ rj rk ri r� r� r� r� r� r r� �_maybe_resume_protocolr� r� r� r� �shutdownrA �SHUT_WR)r$ r� rf r r r r � s4 " z%_SelectorSocketTransport._write_readyc C s. | j s | jrd S d| _| js*| j�tj� d S r� )r� r� r� r� r rA r r; r r r � write_eof� s z"_SelectorSocketTransport.write_eofc C s dS r� r r; r r r � can_write_eof� s z&_SelectorSocketTransport.can_write_eofc s* t � �|� | jd ur&| j�td�� 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 urtd��| j�� | _ | js0| j �d � | j S )NzEmpty waiter is already set)r r7 r� rh r� r� r; r r r r� � s z+_SelectorSocketTransport._make_empty_waiterc C s d | _ d S r) )r r; r r r r� � s z,_SelectorSocketTransport._reset_empty_waiter)NNN)r r� r� Z_start_tls_compatibler Z _SendfileModeZ TRY_NATIVEZ_sendfile_compatibler r� r� r� r� r r r r r r r r r� r� r� r� r r r% r r* � s( � %' r* c sF e Zd ZejZd � fdd� Zdd� Zdd� Zd dd �Z d d � Z � Z S )r4 Nc s^ t � �||||� || _| j�| jj| � | j�| j| j| j � |d urZ| j�t j |d � d S r) ) r r �_addressr� r� r� r rD r� r r r )r$ r� r+ r, r5 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� )�.0rG rc r r r � <genexpr>� � zC_SelectorDatagramTransport.get_write_buffer_size.<locals>.<genexpr>)�sumr� r; r r r r� � s z0_SelectorDatagramTransport.get_write_buffer_sizec C s� | j r d S z| j�| j�\}}W n� ttfy6 Y n� tyd } z| j�|� W Y d }~n\d }~0 t t fyz � Y n> t y� } z| � |d� W Y d }~nd }~0 0 | j� ||� d S )Nz&Fatal read error on datagram transport)r� r� �recvfromr� rK rJ rP r� �error_receivedrj rk ri r� Zdatagram_received�r$ rG re rf r r r r � s "z&_SelectorDatagramTransport._read_readyc C s� t |tttf�s$tdt|�j����|s,d S | jrV|d | jfvrPtd| j� ���| j}| j r�| jr�| j t j krxt � d� | j d7 _ d S | j�sdz,| jd r�| j�|� n| j�||� W d S ttfy� | j�| j| j� Y n~ t�y } z| j�|� W Y d }~d S d }~0 t t f�y0 � Y n4 t �yb } z| � |d� W Y d }~d S d }~0 0 | j� t|�|f� | �!� d S )Nr z!Invalid address: must be None or r r r[ �'Fatal write error on datagram transport)"rm r r� r� rp r� r r rq r� r r r r r� r� r� rO �sendtorK rJ r� r� r� � _sendto_readyrP r� r rj rk ri r� r� r r! r r r r# sJ � � �z!_SelectorDatagramTransport.sendtoc C s | j r�| j �� \}}z*| jd r.| j�|� n| j�||� W q ttfyh | j �||f� Y q�Y q t y� } z| j � |� W Y d }~d S d }~0 t t fy� � Y q ty� } z| �|d� W Y d }~d S d }~0 0 q | �� | j �s| j�| j� | j�r| �d � d S )Nr[ r" )r� �popleftr� r� rO r# rK rJ � appendleftrP r� r rj rk ri r� r r� r� r� r� r� r! r r r r$ 0 s0 �z(_SelectorDatagramTransport._sendto_ready)NNN)N) r r� r� � collections�dequer� r r� r r# r$ r� r r r% r r4 � s � +r4 ) r� �__all__r' r_ r� r rA r� r! 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