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o �b�" � @ s� d Z ddlZddlZddlmZ ddlmZ ddlmZ ddl m Z ze ed�Z e ed�Z e ed �Ze ed �Ze ed �ZW n eyM Z zee��dZ[ww ee�G d d � d ejej��Zdd� Zd dgZdS )z� An epoll() based implementation of the twisted main loop. To install the event loop (and you should do this before any connections, listeners or connectors are added):: from twisted.internet import epollreactor epollreactor.install() � N)� implementer)� posixbase)� IReactorFDSet)�log�epoll�EPOLLHUP�EPOLLERR�EPOLLIN�EPOLLOUTc @ s| e Zd ZdZeeB ZeZe Z dd� Z dd� Z dd� Z dd � Zd d � Zd d � Zdd� Zdd� Zdd� Zdd� Zdd� ZeZdS )� EPollReactora� A reactor that uses epoll(7). @ivar _poller: A C{epoll} which will be used to check for I/O readiness. @ivar _selectables: A dictionary mapping integer file descriptors to instances of C{FileDescriptor} which have been registered with the reactor. All C{FileDescriptors} which are currently receiving read or write readiness notifications will be present as values in this dictionary. @ivar _reads: A set containing integer file descriptors. Values in this set will be registered with C{_poller} for read readiness notifications which will be dispatched to the corresponding C{FileDescriptor} instances in C{_selectables}. @ivar _writes: A set containing integer file descriptors. Values in this set will be registered with C{_poller} for write readiness notifications which will be dispatched to the corresponding C{FileDescriptor} instances in C{_selectables}. @ivar _continuousPolling: A L{_ContinuousPolling} instance, used to handle file descriptors (e.g. filesystem files) that are not supported by C{epoll(7)}. c C s< t d�| _t� | _t� | _i | _t�| �| _tj � | � dS )zm Initialize epoll object, file descriptor tracking dictionaries, and the base class. i N) r �_poller�set�_reads�_writes� _selectablesr �_ContinuousPolling�_continuousPolling�PosixReactorBase�__init__��self� r �?/usr/lib/python3/dist-packages/twisted/internet/epollreactor.pyr G s zEPollReactor.__init__c C s\ |� � }||vr,|}||v r||O }| j�||� n| j�||� |�|� |||< dS dS )z� Private method for adding a descriptor from the event loop. It takes care of adding it if new or modifying it if already added for another state (read -> read/write for example). N)�filenor �modify�register�add) r �xer�primary�other� selectables�event� antievent�fd�flagsr r r �_addV s �zEPollReactor._addc C �d z| � || j| j| jtt� W dS ty1 } z|jtjkr%| j � |� n� W Y d}~dS d}~ww )zR Add a FileDescriptor for notification of data available to read. N) r% r r r r r �OSError�errno�EPERMr � addReader)r �reader�er r r r* p � � ���zEPollReactor.addReaderc C r& )zS Add a FileDescriptor for notification of data available to write. N) r% r r r r r r' r( r) r � addWriter)r �writerr, r r r r. � r- zEPollReactor.addWriterc C sz |� � }|dkr|�� D ] \}}||u r nq dS ||v r;||v r+|} | j�|| � n ||= | j�|� |�|� dS dS )z� Private method for removing a descriptor from the event loop. It does the inverse job of _add, and also add a check in case of the fd has gone away. ���N)r �itemsr r � unregister�remove) r r r r r r! r" r# �fdesr$ r r r �_remove� s � �zEPollReactor._removec C �: | j �|�r| j �|� dS | �|| j| j| jtt� dS )zQ Remove a Selectable for notification of data available to read. N) r � isReading� removeReaderr5 r r r r r )r r+ r r r r8 � � �zEPollReactor.removeReaderc C r6 )zR Remove a Selectable for notification of data available to write. N) r � isWriting� removeWriterr5 r r r r r )r r/ r r r r; � r9 zEPollReactor.removeWriterc s6 � � � fdd�� jD �� fdd�� jD ��� j�� S )zD Remove all selectables, and return a list of them. c � g | ]}� j | �qS r �r ��.0r# r r r � <listcomp>� � z*EPollReactor.removeAll.<locals>.<listcomp>c r< r r= r> r r r r@ � rA )� _removeAllr r r � removeAllr r r r rC � s ���zEPollReactor.removeAllc � � fdd�� j D �� j�� S )Nc r< r r= r> r r r r@ � � �z+EPollReactor.getReaders.<locals>.<listcomp>)r r � getReadersr r r r rF � � ��zEPollReactor.getReadersc rD )Nc r< r r= r> r r r r@ � rE z+EPollReactor.getWriters.<locals>.<listcomp>)r r � getWritersr r r r rH � rG zEPollReactor.getWritersc C s� |du rd}z | j �|t| j��}W n ty, } z|jtjkr'W Y d}~dS � d}~ww | j}|D ] \}}z| j| }W n tyF Y q2w t � |||||� q2dS )z1 Poll the poller for new events. Nr0 ) r �poll�lenr r' r( �EINTR�_doReadOrWrite�KeyErrorr �callWithLogger)r �timeout�l�err�_drdwr# r! � selectabler r r �doPoll� s& �� ��zEPollReactor.doPollN)�__name__� __module__� __qualname__�__doc__r r �_POLL_DISCONNECTEDr �_POLL_INr � _POLL_OUTr r% r* r. r5 r8 r; rC rF rH rT � doIterationr r r r r % s" r c C s t � } ddlm} || � dS )z& Install the epoll() reactor. r )�installReactorN)r �twisted.internet.mainr] )�pr] r r r �install� s r` )rX r( �select�zope.interfacer �twisted.internetr �twisted.internet.interfacesr �twisted.pythonr �getattrr r r r r �AttributeErrorr, � ImportErrorr �_PollLikeMixinr r` �__all__r r r r �<module> s, �� T
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