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Edit: unix_events.cpython-36.pyc
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Adds signal handling and UNIX Domain Socket support to SelectorEventLoop. Nc s t � j|� i | _d S )N)�super�__init__�_signal_handlers)�self�selector)� __class__r r r 7 s z _UnixSelectorEventLoop.__init__c C s t j� S )N)�socketZ socketpair)r r r r � _socketpair; s z"_UnixSelectorEventLoop._socketpairc s^ t � j� tj� s2xFt| j�D ]}| j|� q W n(| jrZtjd| �d�t | d� | jj � d S )NzClosing the loop z@ on interpreter shutdown stage, skipping signal handlers removal)�source) r �close�sys� is_finalizing�listr �remove_signal_handler�warnings�warn�ResourceWarning�clear)r �sig)r! r r r% > s z _UnixSelectorEventLoop.closec C s" x |D ]}|sq| j |� qW d S )N)�_handle_signal)r �datar r r r �_process_self_dataL s z)_UnixSelectorEventLoop._process_self_datac + G sH t j|�st j|�r td��| j|� | j� ytj| jj � � W n2 t t fk rt } zt t |���W Y dd}~X nX tj||| �}|| j|< y tj|t� tj|d� W n� t k �rB } zz| j|= | j�sytjd� W n4 t t fk �r } ztjd|� W Y dd}~X nX |jtjk�r0t dj|���n� W Y dd}~X nX dS )z�Add a handler for a signal. UNIX only. Raise ValueError if the signal number is invalid or uncatchable. Raise RuntimeError if there is a problem setting up the handler. z3coroutines cannot be used with add_signal_handler()NFr z set_wakeup_fd(-1) failed: %szsig {} cannot be caught���)r Z iscoroutineZiscoroutinefunction� TypeError� _check_signalZ _check_closed�signal� set_wakeup_fdZ_csock�fileno� ValueError�OSError� RuntimeError�strr ZHandler r � siginterruptr �info�errno�EINVAL�format)r r. �callback�args�exc�handleZnexcr r r �add_signal_handlerS s0 z)_UnixSelectorEventLoop.add_signal_handlerc C s8 | j j|�}|dkrdS |jr*| j|� n | j|� dS )z2Internal helper that is the actual signal handler.N)r �getZ _cancelledr) Z_add_callback_signalsafe)r r. rD r r r r/ � s z%_UnixSelectorEventLoop._handle_signalc & C s� | j |� y | j|= W n tk r* dS X |tjkr>tj}ntj}ytj||� W n@ tk r� } z$|jtj kr�t dj |���n� W Y dd}~X nX | js�ytj d� W n2 t tfk r� } ztjd|� W Y dd}~X nX dS )zwRemove a handler for a signal. UNIX only. Return True if a signal handler was removed, False if not. Fzsig {} cannot be caughtNr z set_wakeup_fd(-1) failed: %sTr2 )r4 r �KeyErrorr5 �SIGINT�default_int_handler�SIG_DFLr9 r> r? r: r@ r6 r8 r r= )r r. ZhandlerrC r r r r) � s( z,_UnixSelectorEventLoop.remove_signal_handlerc C sH t |t�stdj|���d| ko,tjk n sDtdj|tj���dS )z�Internal helper to validate a signal. Raise ValueError if the signal number is invalid or uncatchable. Raise RuntimeError if there is a problem setting up the handler. z sig must be an int, not {!r}r zsig {} out of range(1, {})N)� isinstance�intr3 r@ r5 �NSIGr8 )r r. r r r r4 � s z$_UnixSelectorEventLoop._check_signalc C s t | ||||�S )N)�_UnixReadPipeTransport)r �pipe�protocol�waiter�extrar r r �_make_read_pipe_transport� s z0_UnixSelectorEventLoop._make_read_pipe_transportc C s t | ||||�S )N)�_UnixWritePipeTransport)r rO rP rQ rR r r r �_make_write_pipe_transport� s z1_UnixSelectorEventLoop._make_write_pipe_transportc k s� t j� ��} | j� } t| |||||||f| |d�| ��} | j| j� | j| � y| E d H W n& tk r~ } z | }W Y d d } ~ X nX d }|d k r�| j� | j � E d H |�W d Q R X | S )N)rQ rR ) r �get_child_watcherZ create_future�_UnixSubprocessTransport�add_child_handlerZget_pid�_child_watcher_callback� Exceptionr% Z_wait)r rP rB �shell�stdin�stdout�stderr�bufsizerR �kwargs�watcherrQ �transprC �errr r r �_make_subprocess_transport� s$ z1_UnixSelectorEventLoop._make_subprocess_transportc C s | j |j|� d S )N)Zcall_soon_threadsafeZ_process_exited)r �pid� returncoderb r r r rY � s z._UnixSelectorEventLoop._child_watcher_callback)�ssl�sock�server_hostnamec c s |d kst |t�st�|r,|d kr<td��n|d k r<td��|d k r�|d k rTtd��tjtjtjd�}y |jd� | j||�E d H W q� |j � � Y q�X nB|d kr�td��|j tjks�t j |j � r�tdj|���|jd� | j||||�E d H \}}||fS )Nz/you have to pass server_hostname when using sslz+server_hostname is only meaningful with sslz3path and sock can not be specified at the same timer Fz no path and sock were specifiedz2A UNIX Domain Stream Socket was expected, got {!r})rK r; �AssertionErrorr8 r" �AF_UNIX� SOCK_STREAM� setblockingZ sock_connectr% �familyr �_is_stream_socket�typer@ Z _create_connection_transport)r �protocol_factoryr rg rh ri � transportrP r r r �create_unix_connection� s: z-_UnixSelectorEventLoop.create_unix_connection�d )rh �backlogrg c ! C s� t |t�rtd��|d k �r0|d k r,td��t|�}tjtjtj�}|d d kr�y tj t j|�j �rnt j |� W nB t k r� Y n0 tk r� } ztjd||� W Y d d }~X nX y|j|� W nj tk �r } z8|j� |jtjk�rdj|�}ttj|�d �n� W Y d d }~X n |j� � Y nX n>|d k�rBtd��|jtjk�s`tj|j� �rntdj|���tj| |g�} |j|� |j d � | j |||| � | S ) Nz*ssl argument must be an SSLContext or Nonez3path and sock can not be specified at the same timer � z2Unable to check or remove stale UNIX socket %r: %rz Address {!r} is already in usez-path was not specified, and no sock specifiedz2A UNIX Domain Stream Socket was expected, got {!r}F)r rv ) rK �boolr3 r8 �_fspathr" rk rl �stat�S_ISSOCK�os�st_mode�remove�FileNotFoundErrorr9 r �errorZbindr% r> Z EADDRINUSEr@ rn r ro rp ZServerZlistenrm Z_start_serving) r rq r rh ru rg rc rC �msgZserverr r r �create_unix_server sP z)_UnixSelectorEventLoop.create_unix_server)N)NN)NN)N)N)�__name__� __module__� __qualname__�__doc__r r# r% r1 rE r/ r) r4 rS rU r rd rY rs r� � __classcell__r r )r! r r 1 s, - %r � set_blockingc C s t j| d� d S )NF)r{ r� )�fdr r r �_set_nonblockingB s r� c C s, t j | t j�}|tjB }t j | t j|� d S )N)�fcntlZF_GETFLr{ � O_NONBLOCKZF_SETFL)r� �flagsr r r r� G s c s� e Zd Zd Zd � fdd� Zdd� Zdd � Zd d � Zd d � Zdd� Z dd� Z dd� Z dd� Z e jrhdd� Zd!dd�Zdd � Zd d � Z� ZS )"rN � i Nc s� t � j|� || jd< || _|| _|j� | _|| _d| _t j | j�j }t j |�pbt j|�pbt j|�s~d | _d | _d | _td��t| j� | jj| jj| � | jj| jj| j| j� |d k r�| jjtj|d � d S )NrO Fz)Pipe transport is for pipes/sockets only.)r r �_extra�_loop�_piper7 �_fileno� _protocol�_closingr{ �fstatr| ry �S_ISFIFOrz �S_ISCHRr8 r� � call_soon�connection_made� _add_reader� _read_readyr � _set_result_unless_cancelled)r �looprO rP rQ rR �mode)r! r r r Q s, z _UnixReadPipeTransport.__init__c C s� | j jg}| jd kr |jd� n| jr0|jd� |jd| j � t| jdd �}| jd k r�|d k r�tj || jt j �}|r�|jd� q�|jd� n | jd k r�|jd� n |jd� dd j |� S ) N�closed�closingzfd=%s� _selector�polling�idle�openz<%s>� ) r! r� r� �appendr� r� �getattrr� r �_test_selector_eventr Z EVENT_READ�join)r r= r r� r r r �__repr__n s$ z _UnixReadPipeTransport.__repr__c C s� yt j| j| j�}W nD ttfk r, Y n� tk rX } z| j|d� W Y d d }~X n^X |rl| jj |� nJ| j j � r�t j d| � d| _| j j| j� | j j| jj� | j j| jd � d S )Nz"Fatal read error on pipe transportz%r was closed by peerT)r{ �readr� �max_size�BlockingIOError�InterruptedErrorr9 � _fatal_errorr� Z data_receivedr� � get_debugr r= r� �_remove_readerr� Z eof_received�_call_connection_lost)r r0 rC r r r r� � s z"_UnixReadPipeTransport._read_readyc C s | j j| j� d S )N)r� r� r� )r r r r � pause_reading� s z$_UnixReadPipeTransport.pause_readingc C s | j j| j| j� d S )N)r� r� r� r� )r r r r �resume_reading� s z%_UnixReadPipeTransport.resume_readingc C s || _ d S )N)r� )r rP r r r � set_protocol� s z#_UnixReadPipeTransport.set_protocolc C s | j S )N)r� )r r r r � get_protocol� s z#_UnixReadPipeTransport.get_protocolc C s | j S )N)r� )r r r r � is_closing� s z!_UnixReadPipeTransport.is_closingc C s | j s| jd � d S )N)r� �_close)r r r r r% � s z _UnixReadPipeTransport.closec C s, | j d k r(tjd| t| d� | j j� d S )Nzunclosed transport %r)r$ )r� r* r+ r, r% )r r r r �__del__� s z _UnixReadPipeTransport.__del__� Fatal error on pipe transportc C sZ t |t�r4|jtjkr4| jj� rLtjd| |dd� n| jj||| | j d�� | j |� d S )Nz%r: %sT)�exc_info)�message� exceptionrr rP ) rK r9 r> ZEIOr� r� r �debug�call_exception_handlerr� r� )r rC r� r r r r� � s z#_UnixReadPipeTransport._fatal_errorc C s( d| _ | jj| j� | jj| j|� d S )NT)r� r� r� r� r� r� )r rC r r r r� � s z _UnixReadPipeTransport._closec C s4 z| j j|� W d | jj� d | _d | _ d | _X d S )N)r� �connection_lostr� r% r� )r rC r r r r� � s z,_UnixReadPipeTransport._call_connection_losti )NN)r� )r� r� r� r� r r� r� r� r� r� r� r� r% r �PY34r� r� r� r� r� r r )r! r rN M s rN c s� e Zd Zd%� fdd� Zdd� Zdd� Zdd � Zd d � Zd d � Zdd� Z dd� Z dd� Z dd� Z dd� Z dd� Zejr|dd� Zd d � Zd&d d �Zd'd!d"�Zd#d$� Z� ZS )(rT Nc s� t � j||� || jd< || _|j� | _|| _t� | _d| _ d| _ t j | j�j }tj|�}tj|�}tj|�} |px|px| s�d | _d | _d | _td��t| j� | jj| jj| � | s�|r�tjjd� r�| jj| jj| j| j� |d k r�| jjt j |d � d S )NrO r Fz?Pipe transport is only for pipes, sockets and character devices�aix) r r r� r� r7 r� r� � bytearray�_buffer� _conn_lostr� r{ r� r| ry r� r� rz r8 r� r� r� r� r& �platform� startswithr� r� r r� ) r r� rO rP rQ rR r� Zis_charZis_fifoZ is_socket)r! r r r � s2 z _UnixWritePipeTransport.__init__c C s� | j jg}| jd kr |jd� n| jr0|jd� |jd| j � t| jdd �}| jd k r�|d k r�tj || jt j �}|r�|jd� n |jd� | j � }|jd| � n | jd k r�|jd� n |jd� d d j |� S ) Nr� r� zfd=%sr� r� r� z bufsize=%sr� z<%s>r� )r! r� r� r� r� r� r� r� r r� r Z EVENT_WRITE�get_write_buffer_sizer� )r r= r r� r_ r r r r� � s( z _UnixWritePipeTransport.__repr__c C s t | j�S )N)�lenr� )r r r r r� s z-_UnixWritePipeTransport.get_write_buffer_sizec C s6 | j j� rtjd| � | jr*| jt� � n| j� d S )Nz%r was closed by peer)r� r� r r= r� r� �BrokenPipeError)r r r r r� s z#_UnixWritePipeTransport._read_readyc C s0 t |tttf�s tt|���t |t�r.t|�}|s6d S | jsB| jrj| jtj krXt j d� | jd7 _d S | j �syt j| j|�}W nT ttfk r� d}Y n: tk r� } z | jd7 _| j|d� d S d }~X nX |t|�kr�d S |dk�rt|�|d � }| jj| j| j� | j |7 _ | j� d S )Nz=pipe closed by peer or os.write(pipe, data) raised exception.r r z#Fatal write error on pipe transport)rK �bytesr� � memoryviewrj �reprr� r� r Z!LOG_THRESHOLD_FOR_CONNLOST_WRITESr �warningr� r{ �writer� r� r� rZ r� r� r� Z _add_writer� _write_readyZ_maybe_pause_protocol)r r0 �nrC r r r r� s4 z _UnixWritePipeTransport.writec C s� | j std��ytj| j| j �}W nj ttfk r: Y n� tk r� } z8| j j� | j d7 _ | j j | j� | j |d� W Y d d }~X nfX |t | j �kr�| j j� | j j | j� | j� | jr�| j j| j� | jd � d S |dkr�| j d |�= d S )NzData should not be emptyr z#Fatal write error on pipe transportr )r� rj r{ r� r� r� r� rZ r- r� r� �_remove_writerr� r� Z_maybe_resume_protocolr� r� r� )r r� rC r r r r� > s( z$_UnixWritePipeTransport._write_readyc C s dS )NTr )r r r r � can_write_eofX s z%_UnixWritePipeTransport.can_write_eofc C sB | j r d S | jst�d| _ | js>| jj| j� | jj| jd � d S )NT) r� r� rj r� r� r� r� r� r� )r r r r � write_eof[ s z!_UnixWritePipeTransport.write_eofc C s || _ d S )N)r� )r rP r r r r� d s z$_UnixWritePipeTransport.set_protocolc C s | j S )N)r� )r r r r r� g s z$_UnixWritePipeTransport.get_protocolc C s | j S )N)r� )r r r r r� j s z"_UnixWritePipeTransport.is_closingc C s | j d k r| j r| j� d S )N)r� r� r� )r r r r r% m s z _UnixWritePipeTransport.closec C s, | j d k r(tjd| t| d� | j j� d S )Nzunclosed transport %r)r$ )r� r* r+ r, r% )r r r r r� v s z _UnixWritePipeTransport.__del__c C s | j d � d S )N)r� )r r r r �abort| s z _UnixWritePipeTransport.abort� Fatal error on pipe transportc C sP t |tj�r*| jj� rBtjd| |dd� n| jj||| | jd�� | j |� d S )Nz%r: %sT)r� )r� r� rr rP ) rK r Z_FATAL_ERROR_IGNOREr� r� r r� r� r� r� )r rC r� r r r r� s z$_UnixWritePipeTransport._fatal_errorc C sF d| _ | jr| jj| j� | jj� | jj| j� | jj| j|� d S )NT) r� r� r� r� r� r- r� r� r� )r rC r r r r� � s z _UnixWritePipeTransport._closec C s4 z| j j|� W d | jj� d | _d | _ d | _X d S )N)r� r� r� r% r� )r rC r r r r� � s z-_UnixWritePipeTransport._call_connection_lost)NN)r� )N)r� r� r� r r� r� r� r� r� r� r� r� r� r� r% r r� r� r� r� r� r� r� r r )r! r rT � s$ % ! rT �set_inheritablec C sN t tdd�}tj| tj�}|s4tj| tj||B � ntj| tj|| @ � d S )NZ FD_CLOEXECr )r� r� ZF_GETFDZF_SETFD)r� Z inheritableZ cloexec_flag�oldr r r �_set_inheritable� s r� c @ s e Zd Zdd� ZdS )rW c K sv d }|t jkr*| jj� \}}t|j� d� t j|f||||d|d�|��| _|d k rr|j� t |j � d|d�| j_ d S )NF)r[ r\ r] r^ Zuniversal_newlinesr_ �wb)� buffering) � subprocess�PIPEr� r# r� r7 �Popen�_procr% r� �detachr\ ) r rB r[ r\ r] r^ r_ r` Zstdin_wr r r �_start� s z _UnixSubprocessTransport._startN)r� r� r� r� r r r r rW � s rW c @ s@ e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dS )r aH Abstract base class for monitoring child processes. Objects derived from this class monitor a collection of subprocesses and report their termination or interruption by a signal. New callbacks are registered with .add_child_handler(). Starting a new process must be done within a 'with' block to allow the watcher to suspend its activity until the new process if fully registered (this is needed to prevent a race condition in some implementations). Example: with watcher: proc = subprocess.Popen("sleep 1") watcher.add_child_handler(proc.pid, callback) Notes: Implementations of this class must be thread-safe. Since child watcher objects may catch the SIGCHLD signal and call waitpid(-1), there should be only one active object per process. c G s t � �dS )a Register a new child handler. Arrange for callback(pid, returncode, *args) to be called when process 'pid' terminates. Specifying another callback for the same process replaces the previous handler. Note: callback() must be thread-safe. N)�NotImplementedError)r re rA rB r r r rX � s z&AbstractChildWatcher.add_child_handlerc C s t � �dS )z�Removes the handler for process 'pid'. The function returns True if the handler was successfully removed, False if there was nothing to remove.N)r� )r re r r r �remove_child_handler� s z)AbstractChildWatcher.remove_child_handlerc C s t � �dS )z�Attach the watcher to an event loop. If the watcher was previously attached to an event loop, then it is first detached before attaching to the new loop. Note: loop may be None. N)r� )r r� r r r � attach_loop� s z AbstractChildWatcher.attach_loopc C s t � �dS )zlClose the watcher. This must be called to make sure that any underlying resource is freed. N)r� )r r r r r% � s zAbstractChildWatcher.closec C s t � �dS )zdEnter the watcher's context and allow starting new processes This function must return selfN)r� )r r r r � __enter__ s z AbstractChildWatcher.__enter__c C s t � �dS )zExit the watcher's contextN)r� )r �a�b�cr r r �__exit__ s z AbstractChildWatcher.__exit__N) r� r� r� r� rX r� r� r% r� r� r r r r r � s c @ sD e Zd Zdd� Zdd� Zdd� Zdd� Zd d � Zd d � Zd d� Z dS )�BaseChildWatcherc C s d | _ i | _d S )N)r� � _callbacks)r r r r r s zBaseChildWatcher.__init__c C s | j d � d S )N)r� )r r r r r% s zBaseChildWatcher.closec C s t � �d S )N)r� )r � expected_pidr r r � _do_waitpid s z BaseChildWatcher._do_waitpidc C s t � �d S )N)r� )r r r r �_do_waitpid_all s z BaseChildWatcher._do_waitpid_allc C s~ |d kst |tj�st�| jd k r<|d kr<| jr<tjdt� | jd k rT| jj t j � || _|d k rz|j t j | j � | j� d S )NzCA loop is being detached from a child watcher with pending handlers)rK r ZAbstractEventLooprj r� r� r* r+ �RuntimeWarningr) r5 �SIGCHLDrE � _sig_chldr� )r r� r r r r� s z BaseChildWatcher.attach_loopc C sF y | j � W n4 tk r@ } z| jjd|d�� W Y d d }~X nX d S )Nz$Unknown exception in SIGCHLD handler)r� r� )r� rZ r� r� )r rC r r r r� 1 s zBaseChildWatcher._sig_chldc C s2 t j|�rt j|� S t j|�r*t j|�S |S d S )N)r{ � WIFSIGNALED�WTERMSIG� WIFEXITED� WEXITSTATUS)r �statusr r r �_compute_returncode= s z$BaseChildWatcher._compute_returncodeN) r� r� r� r r% r� r� r� r� r� r r r r r� s r� c sP e Zd ZdZ� fdd�Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z � Z S )r ad 'Safe' child watcher implementation. This implementation avoids disrupting other code spawning processes by polling explicitly each process in the SIGCHLD handler instead of calling os.waitpid(-1). This is a safe solution but it has a significant overhead when handling a big number of children (O(n) each time SIGCHLD is raised) c s | j j� t� j� d S )N)r� r- r r% )r )r! r r r% V s zSafeChildWatcher.closec C s | S )Nr )r r r r r� Z s zSafeChildWatcher.__enter__c C s d S )Nr )r r� r� r� r r r r� ] s zSafeChildWatcher.__exit__c G s. | j d krtd��||f| j|< | j|� d S )NzICannot add child handler, the child watcher does not have a loop attached)r� r: r� r� )r re rA rB r r r rX ` s z"SafeChildWatcher.add_child_handlerc C s& y | j |= dS tk r dS X d S )NTF)r� rG )r re r r r r� k s z%SafeChildWatcher.remove_child_handlerc C s" x t | j�D ]}| j|� q W d S )N)r( r� r� )r re r r r r� r s z SafeChildWatcher._do_waitpid_allc C s� |dks t �ytj|tj�\}}W n( tk rJ |}d}tjd|� Y n0X |dkrXd S | j|�}| jj � rztj d||� y| j j |�\}}W n. t k r� | jj � r�tjd|dd� Y nX |||f|�� d S )Nr � z8Unknown child process pid %d, will report returncode 255z$process %s exited with returncode %sz'Child watcher got an unexpected pid: %rT)r� )rj r{ �waitpid�WNOHANG�ChildProcessErrorr r� r� r� r� r� r� �poprG )r r� re r� rf rA rB r r r r� w s, z SafeChildWatcher._do_waitpid) r� r� r� r� r% r� r� rX r� r� r� r� r r )r! r r K s c sT e Zd ZdZ� fdd�Z� fdd�Zdd� Zdd � Zd d � Zd d � Z dd� Z � Z S )r aW 'Fast' child watcher implementation. This implementation reaps every terminated processes by calling os.waitpid(-1) directly, possibly breaking other code spawning processes and waiting for their termination. There is no noticeable overhead when handling a big number of children (O(1) each time a child terminates). c s$ t � j� tj� | _i | _d| _d S )Nr )r r � threadingZLock�_lock�_zombies�_forks)r )r! r r r � s zFastChildWatcher.__init__c s" | j j� | jj� t� j� d S )N)r� r- r� r r% )r )r! r r r% � s zFastChildWatcher.closec C s$ | j � | jd7 _| S Q R X d S )Nr )r� r� )r r r r r� � s zFastChildWatcher.__enter__c C sV | j �: | jd8 _| js$| j r(d S t| j�}| jj� W d Q R X tjd|� d S )Nr z5Caught subprocesses termination from unknown pids: %s)r� r� r� r; r- r r� )r r� r� r� Zcollateral_victimsr r r r� � s zFastChildWatcher.__exit__c G sz | j std��| jd kr td��| j�: y| jj|�}W n" tk rZ ||f| j|< d S X W d Q R X |||f|�� d S )Nz Must use the context managerzICannot add child handler, the child watcher does not have a loop attached) r� rj r� r: r� r� r� rG r� )r re rA rB rf r r r rX � s z"FastChildWatcher.add_child_handlerc C s& y | j |= dS tk r dS X d S )NTF)r� rG )r re r r r r� � s z%FastChildWatcher.remove_child_handlerc C s� x�yt jdt j�\}}W n tk r, d S X |dkr:d S | j|�}| j�v y| jj|�\}}W nB tk r� | j r�|| j |< | j j � r�t jd||� wd }Y nX | j j � r�t jd||� W d Q R X |d kr�t jd||� q|||f|�� qW d S )Nr r z,unknown process %s exited with returncode %sz$process %s exited with returncode %sz8Caught subprocess termination from unknown pid: %d -> %dr2 )r{ r� r� r� r� r� r� r� rG r� r� r� r� r r� r� )r re r� rf rA rB r r r r� � s6 z FastChildWatcher._do_waitpid_all) r� r� r� r� r r% r� r� rX r� r� r� r r )r! r r � s c sH e Zd ZdZeZ� fdd�Zdd� Z� fdd�Zdd � Z d d � Z � Z S ) �_UnixDefaultEventLoopPolicyz:UNIX event loop policy with a watcher for child processes.c s t � j� d | _d S )N)r r �_watcher)r )r! r r r s z$_UnixDefaultEventLoopPolicy.__init__c C sH t j�8 | jd kr:t� | _ttj� tj�r:| jj| j j � W d Q R X d S )N) r r� r r rK r� �current_thread� _MainThreadr� �_localr� )r r r r � _init_watcher s z)_UnixDefaultEventLoopPolicy._init_watcherc s6 t � j|� | jdk r2ttj� tj�r2| jj|� dS )z�Set the event loop. As a side effect, if a child watcher was set before, then calling .set_event_loop() from the main thread will call .attach_loop(loop) on the child watcher. N)r �set_event_loopr rK r� r r r� )r r� )r! r r r s z*_UnixDefaultEventLoopPolicy.set_event_loopc C s | j dkr| j� | j S )zzGet the watcher for child processes. If not yet set, a SafeChildWatcher object is automatically created. N)r r )r r r r rV & s z-_UnixDefaultEventLoopPolicy.get_child_watcherc C s4 |dkst |t�st�| jdk r*| jj� || _dS )z$Set the watcher for child processes.N)rK r rj r r% )r ra r r r �set_child_watcher0 s z-_UnixDefaultEventLoopPolicy.set_child_watcher) r� r� r� r� r Z _loop_factoryr r r rV r r� r r )r! r r s r )5r� r> r{ r5 r" ry r� r& r� r* � r r r r r r r r r r r �logr �__all__r� � ImportErrorr �fspathrx �AttributeErrorZBaseSelectorEventLoopr �hasattrr� r� Z ReadTransportrN Z_FlowControlMixinZWriteTransportrT r� r� ZBaseSubprocessTransportrW r r� r r ZBaseDefaultEventLoopPolicyr r r r r r r �<module> sn O F=On2
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