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unix_events.cpython-39.opt-1.pyc
a ÕDOg*Ê ã @ sæ d Z ddlZddlZddlZddlZddlZddlZddlZddlZddl Z ddl Z ddl Z ddl Z ddl mZ ddl mZ ddl mZ ddl mZ ddl mZ dd l mZ dd l mZ dd l mZ dd l mZ dd l mZ ddlmZ dZe jdkrþe dƒ‚dd„ Z G dd„ dej ƒZ G dd„ dej ƒZ!G dd„ dej"ej#ƒZ$G dd„ dej%ƒZ&G d d „ d ƒZ'G d d „ d e'ƒZ(d d!„ Z)G d"d#„ d#e'ƒZ*G d$d%„ d%e*ƒZ+G d&d'„ d'e*ƒZ,G d(d)„ d)e'ƒZ-G d*d+„ d+e'ƒZ.G d,d-„ d-ej/ƒZ0e Z1e0Z2dS ).z2Selector event loop for Unix with signal handling.é Né )Ú base_events)Úbase_subprocess)Ú constants)Ú coroutines)Úevents)Ú exceptions)Úfutures)Úselector_events)Útasks)Ú transports)Úlogger)ÚSelectorEventLoopÚAbstractChildWatcherÚSafeChildWatcherÚFastChildWatcherÚPidfdChildWatcherÚMultiLoopChildWatcherÚThreadedChildWatcherÚDefaultEventLoopPolicyÚwin32z+Signals are not really supported on Windowsc C s dS )zDummy signal handler.N© )ÚsignumÚframer r ú+/usr/lib64/python3.9/asyncio/unix_events.pyÚ_sighandler_noop* s r c sÊ e Zd ZdZd)‡ fdd„ Z‡ fdd„Zdd„ Zd d „ Zd d „ Zd d„ Z dd„ Z d*dd„Z d+dd„Z d,dd„Z dd„ Zd-dddddœdd„Zd.dd ddd d œd d „Zd!d"„ Zd#d$„ Zd%d&„ Zd'd(„ Z‡ ZS )/Ú_UnixSelectorEventLoopzdUnix event loop. Adds signal handling and UNIX Domain Socket support to SelectorEventLoop. Nc s t ƒ |¡ i | _d S ©N)ÚsuperÚ__init__Ú_signal_handlers)ÚselfÚselector©Ú __class__r r r 5 s z _UnixSelectorEventLoop.__init__c sZ t ƒ ¡ t ¡ s.t| jƒD ]}| |¡ q n(| jrVtjd| ›dt | d | j ¡ d S )NzClosing the loop z@ on interpreter shutdown stage, skipping signal handlers removal©Úsource) r ÚcloseÚsysÚ is_finalizingÚlistr Úremove_signal_handlerÚwarningsÚwarnÚResourceWarningÚclear©r! Úsigr# r r r' 9 s üz _UnixSelectorEventLoop.closec C s |D ]}|sq| |¡ qd S r )Ú_handle_signal)r! Údatar r r r Ú_process_self_dataG s z)_UnixSelectorEventLoop._process_self_datac G sR t |¡st |¡r tdƒ‚| |¡ | ¡ zt | j ¡ ¡ W n4 t t fyv } zt t |ƒƒ‚W Y d}~n d}~0 0 t ||| d¡}|| j|< z t |t¡ t |d¡ W nž t yL } z„| j|= | jszt d¡ W n6 t t fy } zt d|¡ W Y d}~n d}~0 0 |jtjkr6t d|› dƒ‚n‚ W Y d}~n d}~0 0 dS )zÃAdd 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()NFéÿÿÿÿú set_wakeup_fd(-1) failed: %súsig ú cannot be caught)r Z iscoroutineZiscoroutinefunctionÚ TypeErrorÚ _check_signalÚ _check_closedÚsignalÚ set_wakeup_fdZ_csockÚfilenoÚ ValueErrorÚOSErrorÚ RuntimeErrorÚstrr ÚHandler r Ú siginterruptr ÚinfoÚerrnoÚEINVAL)r! r1 ÚcallbackÚargsÚexcÚhandleZnexcr r r Úadd_signal_handlerN s2 ÿ " "z)_UnixSelectorEventLoop.add_signal_handlerc C s8 | j |¡}|du rdS |jr*| |¡ n | |¡ dS )z2Internal helper that is the actual signal handler.N)r ÚgetZ _cancelledr+ Z_add_callback_signalsafe)r! r1 rK r r r r2 { s z%_UnixSelectorEventLoop._handle_signalc C sè | |¡ z | j|= W n ty* Y dS 0 |tjkr>tj}ntj}zt ||¡ W nD ty˜ } z,|jtj kr‚t d|› dƒ‚n‚ W Y d}~n d}~0 0 | jsäzt d¡ W n4 t tfyâ } zt d|¡ W Y d}~n d}~0 0 dS )zwRemove a handler for a signal. UNIX only. Return True if a signal handler was removed, False if not. Fr7 r8 Nr5 r6 T)r: r ÚKeyErrorr< ÚSIGINTÚdefault_int_handlerÚSIG_DFLr@ rF rG rA r= r? r rE )r! r1 ÚhandlerrJ r r r r+ … s( "z,_UnixSelectorEventLoop.remove_signal_handlerc C s6 t |tƒstd|›ƒ‚|t ¡ vr2td|› ƒ‚dS )zÁInternal 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. zsig must be an int, not zinvalid signal number N)Ú isinstanceÚintr9 r< Ú valid_signalsr? r0 r r r r: ¥ s z$_UnixSelectorEventLoop._check_signalc C s t | ||||ƒS r )Ú_UnixReadPipeTransport©r! ÚpipeÚprotocolÚwaiterÚextrar r r Ú_make_read_pipe_transport± s z0_UnixSelectorEventLoop._make_read_pipe_transportc C s t | ||||ƒS r )Ú_UnixWritePipeTransportrW r r r Ú_make_write_pipe_transportµ s z1_UnixSelectorEventLoop._make_write_pipe_transportc Ë sÌ t ¡ °} | ¡ stdƒ‚| ¡ } t| |||||||f| |dœ| ¤Ž} | | ¡ | j| ¡ z| I d H W n@ t t fy€ ‚ Y n* t y¨ | ¡ | ¡ I d H ‚ Y n0 W d ƒ n1 s¾0 Y | S )NzRasyncio.get_child_watcher() is not activated, subprocess support is not installed.)rZ r[ )r Úget_child_watcherÚ is_activerA Ú create_futureÚ_UnixSubprocessTransportÚadd_child_handlerZget_pidÚ_child_watcher_callbackÚ SystemExitÚKeyboardInterruptÚ BaseExceptionr' Ú_wait) r! rY rI ÚshellÚstdinÚstdoutÚstderrÚbufsizer[ ÚkwargsÚwatcherrZ Útranspr r r Ú_make_subprocess_transport¹ s. ÿþý ÿ &z1_UnixSelectorEventLoop._make_subprocess_transportc C s | |j|¡ d S r )Úcall_soon_threadsafeZ_process_exited)r! ÚpidÚ returncoderp r r r rd × s z._UnixSelectorEventLoop._child_watcher_callback)ÚsslÚsockÚserver_hostnameÚssl_handshake_timeoutc à s |r|d u r6t dƒ‚n |d ur&t dƒ‚|d ur6t dƒ‚|d ur¤|d urNt dƒ‚t |¡}t tjtjd¡}z | d¡ | ||¡I d H W qä | ¡ ‚ Y qä0 n@|d u r´t dƒ‚|j tjksÌ|j tjkrÚt d|›ƒ‚| d¡ | j |||||d I d H \}}||fS ) Nz/you have to pass server_hostname when using sslz+server_hostname is only meaningful with sslú1ssl_handshake_timeout is only meaningful with sslú3path and sock can not be specified at the same timer Fz no path and sock were specifiedú.A UNIX Domain Stream Socket was expected, got )rx ) r? ÚosÚfspathÚsocketÚAF_UNIXÚ SOCK_STREAMÚ setblockingZ sock_connectr' ÚfamilyÚtypeZ _create_connection_transport) r! Úprotocol_factoryÚpathru rv rw rx Ú transportrY r r r Úcreate_unix_connectionÚ sL ÿÿÿ ÿÿ þz-_UnixSelectorEventLoop.create_unix_connectionéd T)rv Úbacklogru rx Ú start_servingc à sÈ t |tƒrtdƒ‚|d ur&|s&tdƒ‚|d urJ|d ur@tdƒ‚t |¡}t tjtj¡}|d dvrÊz t t |¡j ¡r„t |¡ W nB t y˜ Y n2 tyÈ } zt d||¡ W Y d }~n d }~0 0 z| |¡ W nn ty2 } z@| ¡ | jtjkr d|›d} ttj| ƒd ‚n‚ W Y d } ~ n d } ~ 0 | ¡ ‚ Y n0 n<|d u r\td ƒ‚|jtjksx|jtjkr†td |›ƒ‚| d ¡ t | |g||||¡} |rÄ| ¡ t d¡I d H | S ) Nz*ssl argument must be an SSLContext or Nonery rz r )r ú z2Unable to check or remove stale UNIX socket %r: %rzAddress z is already in usez-path was not specified, and no sock specifiedr{ F) rS Úboolr9 r? r| r} r~ r r€ ÚstatÚS_ISSOCKÚst_modeÚremoveÚFileNotFoundErrorr@ r ÚerrorÚbindr' rF Z EADDRINUSEr‚ rƒ r r ZServerZ_start_servingr Úsleep) r! r„ r… rv r‰ ru rx rŠ ÚerrrJ ÚmsgZserverr r r Úcreate_unix_server sh ÿ ÿ ÿ ÿ ÿÿ ÿz)_UnixSelectorEventLoop.create_unix_serverc à sÖ z t j W n ty& t d¡‚Y n0 z | ¡ }W n4 ttjfyh } zt d¡‚W Y d }~n d }~0 0 zt |¡j }W n t y– t d¡‚Y n0 |r |n|}|s¬dS | ¡ } | | d |||||d¡ | I d H S )Nz os.sendfile() is not availableznot a regular filer ) r| ÚsendfileÚAttributeErrorr ÚSendfileNotAvailableErrorr> ÚioÚUnsupportedOperationÚfstatÚst_sizer@ ra Ú_sock_sendfile_native_impl) r! rv ÚfileÚoffsetÚcountr> r• ÚfsizeÚ blocksizeÚfutr r r Ú_sock_sendfile_nativeJ s, ÿ ÿz,_UnixSelectorEventLoop._sock_sendfile_nativec C s, | ¡ } |d ur| |¡ | ¡ r4| |||¡ d S |rd|| }|dkrd| |||¡ | |¡ d S zt | |||¡} W nD ttfyÄ |d u r | ||¡ | | | j || ||||||¡ Y nd t yj } zŽ|d ur| j t jkrt| ƒturtdt jƒ} | | _| } |dkr>t d¡} | |||¡ | | ¡ n| |||¡ | | ¡ W Y d } ~ nÆd } ~ 0 ttfy‚ ‚ Y n¦ ty¾ } z$| |||¡ | | ¡ W Y d } ~ nrd } ~ 0 0 | dkrä| |||¡ | |¡ nD|| 7 }|| 7 }|d u r | ||¡ | | | j || ||||||¡ d S )Nr zsocket is not connectedzos.sendfile call failed)r> Ú remove_writerÚ cancelledÚ _sock_sendfile_update_fileposÚ set_resultr| r˜ ÚBlockingIOErrorÚInterruptedErrorÚ _sock_add_cancellation_callbackZ add_writerrŸ r@ rF ZENOTCONNrƒ ÚConnectionErrorÚ __cause__r rš Ú set_exceptionre rf rg )r! r¥ Z registered_fdrv r> r¡ r¢ r¤ Ú total_sentÚfdÚsentrJ Únew_excr• r r r rŸ a sp þ ÿ þÿ ÿ þz1_UnixSelectorEventLoop._sock_sendfile_native_implc C s |dkrt ||t j¡ d S ©Nr )r| ÚlseekÚSEEK_SET)r! r> r¡ r± r r r r© § s z4_UnixSelectorEventLoop._sock_sendfile_update_fileposc s ‡ ‡fdd„}| |¡ d S )Nc s& | ¡ r"ˆ ¡ }|dkr"ˆ |¡ d S )Nr5 )r¨ r> r§ )r¥ r² ©r! rv r r Úcb¬ s zB_UnixSelectorEventLoop._sock_add_cancellation_callback.<locals>.cb)Úadd_done_callback)r! r¥ rv r¹ r r¸ r r « s z6_UnixSelectorEventLoop._sock_add_cancellation_callback)N)NN)NN)N)N)N)Ú__name__Ú __module__Ú __qualname__Ú__doc__r r' r4 rL r2 r+ r: r\ r^ rq rd r‡ r— r¦ rŸ r© r Ú __classcell__r r r# r r / sB - ÿ ÿ þ ÿü . ÿü CFr c sŠ e Zd ZdZd ‡ fdd„ Zdd„ Zdd„ Zd d „ Zd d „ Zd d„ Z dd„ Z dd„ Z dd„ Z e jfdd„Zd dd„Zdd„ Zd d „ Z‡ ZS ) rV i Nc sÚ t ƒ |¡ || jd< || _|| _| ¡ | _|| _d| _d| _ t | j¡j }t |¡s„t |¡s„t |¡s„d | _d | _d | _tdƒ‚t | jd¡ | j | jj| ¡ | j | jj| j| j¡ |d urÖ| j tj|d ¡ d S )NrX Fz)Pipe transport is for pipes/sockets only.)r r Ú_extraÚ_loopÚ_piper> Ú_filenoÚ _protocolÚ_closingÚ_pausedr| r r r ÚS_ISFIFOrŽ ÚS_ISCHRr? Ú set_blockingÚ call_soonÚconnection_madeÚ _add_readerÚ _read_readyr Ú _set_result_unless_cancelled)r! ÚlooprX rY rZ r[ Úmoder# r r r ¸ s6 ÿþ ÿ ÿz _UnixReadPipeTransport.__init__c C sÀ | j jg}| jd u r | d¡ n| jr0| d¡ | d| j› ¡ t| jdd ƒ}| jd ur|d urt || jt j ¡}|r„| d¡ q°| d¡ n | jd ur¦| d¡ n | d¡ d d |¡¡S ) NÚclosedÚclosingúfd=Ú _selectorÚpollingÚidleÚopenú<{}>ú )r$ r» r ÚappendrÅ rà ÚgetattrrÁ r Ú_test_selector_eventÚ selectorsÚ EVENT_READÚformatÚjoin)r! rE r" rÕ r r r Ú__repr__Ö s$ ÿ z _UnixReadPipeTransport.__repr__c C sº zt | j| j¡}W nD ttfy* Y nŒ tyX } z| |d¡ W Y d }~nfd }~0 0 |rl| j |¡ nJ| j ¡ r‚t d| ¡ d| _| j | j¡ | j | jj¡ | j | jd ¡ d S )Nz"Fatal read error on pipe transportú%r was closed by peerT)r| Úreadrà Úmax_sizer« r¬ r@ Ú _fatal_errorrÄ Z data_receivedrÁ Ú get_debugr rE rÅ Ú_remove_readerrÊ Z eof_receivedÚ_call_connection_lost)r! r3 rJ r r r rÍ ë s " z"_UnixReadPipeTransport._read_readyc C s> | j s | jrd S d| _| j | j¡ | j ¡ r:t d| ¡ d S )NTz%r pauses reading)rÅ rÆ rÁ rç rà ræ r Údebug©r! r r r Ú pause_readingý s z$_UnixReadPipeTransport.pause_readingc C sB | j s | jsd S d| _| j | j| j¡ | j ¡ r>t d| ¡ d S )NFz%r resumes reading) rÅ rÆ rÁ rÌ rà rÍ ræ r ré rê r r r Úresume_reading s z%_UnixReadPipeTransport.resume_readingc C s || _ d S r ©rÄ ©r! rY r r r Ú set_protocol s z#_UnixReadPipeTransport.set_protocolc C s | j S r rí rê r r r Ú get_protocol s z#_UnixReadPipeTransport.get_protocolc C s | j S r ©rÅ rê r r r Ú is_closing s z!_UnixReadPipeTransport.is_closingc C s | j s| d ¡ d S r )rÅ Ú_closerê r r r r' s z _UnixReadPipeTransport.closec C s, | j d ur(|d| ›t| d | j ¡ d S ©Nzunclosed transport r% ©r r. r' ©r! Ú_warnr r r Ú__del__ s z _UnixReadPipeTransport.__del__ú Fatal error on pipe transportc C sZ t |tƒr4|jtjkr4| j ¡ rLtjd| |dd n| j ||| | j dœ¡ | |¡ d S ©Nz%r: %sT©Úexc_info)ÚmessageÚ exceptionr† rY ) rS r@ rF ZEIOrÁ ræ r ré Úcall_exception_handlerrÄ ró ©r! rJ rý r r r rå s üz#_UnixReadPipeTransport._fatal_errorc C s( d| _ | j | j¡ | j | j|¡ d S ©NT)rÅ rÁ rç rà rÊ rè ©r! rJ r r r ró - s z _UnixReadPipeTransport._closec C sP z,| j |¡ W | j ¡ d | _d | _ d | _n | j ¡ d | _d | _ d | _0 d S r ©rÄ Zconnection_lostr r' rÁ r r r r rè 2 s ý z,_UnixReadPipeTransport._call_connection_lost)NN)rù )r» r¼ r½ rä r rá rÍ rë rì rï rð rò r' r, r- rø rå ró rè r¿ r r r# r rV ´ s rV c s¨ e Zd Zd%‡ fdd„ Zdd„ Zdd„ Zdd „ Zd d „ Zd d „ Zdd„ Z dd„ Z dd„ Z dd„ Z dd„ Z dd„ Zejfdd„Zd d „ Zd&d d „Zd'd!d"„Zd#d$„ Z‡ ZS )(r] Nc sþ t ƒ ||¡ || jd< || _| ¡ | _|| _tƒ | _d| _ d| _ t | j¡j }t |¡}t |¡}t |¡} |s”|s”| s”d | _d | _d | _tdƒ‚t | jd¡ | j | jj| ¡ | sÈ|ràtj d¡sà| j | jj| j| j¡ |d urú| j t j |d ¡ d S )NrX r Fz?Pipe transport is only for pipes, sockets and character devicesZaix) r r rÀ r r> rà rÄ Ú bytearrayÚ_bufferÚ _conn_lostrÅ r| r r r rÈ rÇ rŽ r? rÉ rÁ rÊ rË r( ÚplatformÚ startswithrÌ rÍ r rÎ ) r! rÏ rX rY rZ r[ rÐ Zis_charÚis_fifoÚ is_socketr# r r r ? s6 ÿ ÿz _UnixWritePipeTransport.__init__c C sØ | j jg}| jd u r | d¡ n| jr0| d¡ | d| j› ¡ t| jdd ƒ}| jd ur¨|d ur¨t || jt j ¡}|r„| d¡ n | d¡ | ¡ }| d|› ¡ n | jd ur¾| d¡ n | d¡ d d |¡¡S ) NrÑ rÒ rÓ rÔ rÕ rÖ zbufsize=r× rØ rÙ )r$ r» r rÚ rÅ rà rÛ rÁ r rÜ rÝ Ú EVENT_WRITEÚget_write_buffer_sizerß rà )r! rE r" rÕ rm r r r rá d s( ÿ z _UnixWritePipeTransport.__repr__c C s t | jƒS r )Úlenr rê r r r r | s z-_UnixWritePipeTransport.get_write_buffer_sizec C s6 | j ¡ rt d| ¡ | jr*| tƒ ¡ n| ¡ d S )Nrâ )rÁ ræ r rE r ró ÚBrokenPipeErrorrê r r r rÍ s z#_UnixWritePipeTransport._read_readyc C s. t |tƒrt|ƒ}|sd S | js&| jrN| jtjkr<t d¡ | jd7 _d S | j szt | j |¡}W nn t tfy‚ d}Y nV ttfy˜ ‚ Y n@ tyÖ } z(| jd7 _| |d¡ W Y d }~d S d }~0 0 |t|ƒkrèd S |dkrt|ƒ|d … }| j | j | j¡ | j |7 _ | ¡ d S )Nz=pipe closed by peer or os.write(pipe, data) raised exception.r r ú#Fatal write error on pipe transport)rS r Ú memoryviewr rÅ r Z!LOG_THRESHOLD_FOR_CONNLOST_WRITESr Úwarningr r| Úwriterà r« r¬ re rf rg rå r rÁ Z _add_writerÚ _write_readyZ_maybe_pause_protocol)r! r3 ÚnrJ r r r r ˆ s6 z _UnixWritePipeTransport.writec C sþ zt | j| j¡}W n€ ttfy* Y nÐ ttfy@ ‚ Y nº ty” } z>| j ¡ | j d7 _ | j | j¡ | |d¡ W Y d }~nnd }~0 0 |t| jƒkræ| j ¡ | j | j¡ | ¡ | jrâ| j | j¡ | d ¡ d S |dkrú| jd |…= d S )Nr r r )r| r rà r r« r¬ re rf rg r/ r rÁ Ú_remove_writerrå r Z_maybe_resume_protocolrÅ rç rè )r! r rJ r r r r « s* " z$_UnixWritePipeTransport._write_readyc C s dS r r rê r r r Ú can_write_eofÇ s z%_UnixWritePipeTransport.can_write_eofc C s8 | j r d S d| _ | js4| j | j¡ | j | jd ¡ d S r )rÅ r rÁ rç rà rÊ rè rê r r r Ú write_eofÊ s z!_UnixWritePipeTransport.write_eofc C s || _ d S r rí rî r r r rï Ó s z$_UnixWritePipeTransport.set_protocolc C s | j S r rí rê r r r rð Ö s z$_UnixWritePipeTransport.get_protocolc C s | j S r rñ rê r r r rò Ù s z"_UnixWritePipeTransport.is_closingc C s | j d ur| js| ¡ d S r )r rÅ r rê r r r r' Ü s z _UnixWritePipeTransport.closec C s, | j d ur(|d| ›t| d | j ¡ d S rô rõ rö r r r rø á s z _UnixWritePipeTransport.__del__c C s | d ¡ d S r )ró rê r r r Úabortæ s z _UnixWritePipeTransport.abortrù c C sN t |tƒr(| j ¡ r@tjd| |dd n| j ||| | jdœ¡ | |¡ d S rú ) rS r@ rÁ ræ r ré rÿ rÄ ró r r r r rå é s üz$_UnixWritePipeTransport._fatal_errorc C sF d| _ | jr| j | j¡ | j ¡ | j | j¡ | j | j|¡ d S r ) rÅ r rÁ r rà r/ rç rÊ rè r r r r ró ÷ s z _UnixWritePipeTransport._closec C sP z,| j |¡ W | j ¡ d | _d | _ d | _n | j ¡ d | _d | _ d | _0 d S r r r r r r rè ÿ s ý z-_UnixWritePipeTransport._call_connection_lost)NN)rù )N)r» r¼ r½ r rá r rÍ r r r r rï rð rò r' r, r- rø r rå ró rè r¿ r r r# r r] < s" % # r] c @ s e Zd Zdd„ ZdS )rb c K s¢ d }|t jkrt ¡ \}}zht j|f||||d|dœ|¤Ž| _|d urh| ¡ t| ¡ d|d| j_ d }W |d urž| ¡ | ¡ n|d urœ| ¡ | ¡ 0 d S )NF)ri rj rk rl Úuniversal_newlinesrm Úwb)Ú buffering) Ú subprocessÚPIPEr~ Ú socketpairÚPopenÚ_procr' r× Údetachrj ) r! rI ri rj rk rl rm rn Zstdin_wr r r Ú_start s, ÿþþ þz _UnixSubprocessTransport._startN)r» r¼ r½ r" r r r r rb s rb c @ sH e Zd ZdZdd„ Zdd„ Zdd„ Zdd „ Zd d „ Zd d „ Z dd„ 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 ƒ ‚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©ÚNotImplementedError©r! rs rH rI r r r rc 9 s z&AbstractChildWatcher.add_child_handlerc C s t ƒ ‚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.Nr# ©r! rs r r r Úremove_child_handlerD s z)AbstractChildWatcher.remove_child_handlerc C s t ƒ ‚dS )zÔAttach 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. Nr# ©r! rÏ r r r Ú attach_loopL s z AbstractChildWatcher.attach_loopc C s t ƒ ‚dS )zlClose the watcher. This must be called to make sure that any underlying resource is freed. Nr# rê r r r r' V s zAbstractChildWatcher.closec C s t ƒ ‚dS )zºReturn ``True`` if the watcher is active and is used by the event loop. Return True if the watcher is installed and ready to handle process exit notifications. Nr# rê r r r r` ] s z AbstractChildWatcher.is_activec C s t ƒ ‚dS )zdEnter the watcher's context and allow starting new processes This function must return selfNr# rê r r r Ú __enter__f s z AbstractChildWatcher.__enter__c C s t ƒ ‚dS )zExit the watcher's contextNr# ©r! ÚaÚbÚcr r r Ú__exit__l s z AbstractChildWatcher.__exit__N) r» r¼ r½ r¾ rc r' r) r' r` r* r/ r r r r r " s r c @ sX e Zd ZdZdd„ Zdd„ Zdd„ Zdd „ Zd d „ Zd d „ Z dd„ Z dd„ Z dd„ Z dS )r a6 Child watcher implementation using Linux's pid file descriptors. This child watcher polls process file descriptors (pidfds) to await child process termination. In some respects, PidfdChildWatcher is a "Goldilocks" child watcher implementation. It doesn't require signals or threads, doesn't interfere with any processes launched outside the event loop, and scales linearly with the number of subprocesses launched by the event loop. The main disadvantage is that pidfds are specific to Linux, and only work on recent (5.3+) kernels. c C s d | _ i | _d S r ©rÁ Ú _callbacksrê r r r r } s zPidfdChildWatcher.__init__c C s | S r r rê r r r r* s zPidfdChildWatcher.__enter__c C s d S r r )r! Úexc_typeÚ exc_valueÚ exc_tracebackr r r r/ „ s zPidfdChildWatcher.__exit__c C s | j d uo| j ¡ S r ©rÁ Z is_runningrê r r r r` ‡ s zPidfdChildWatcher.is_activec C s | d ¡ d S r ©r) rê r r r r' Š s zPidfdChildWatcher.closec C sd | j d ur$|d u r$| jr$t dt¡ | j ¡ D ] \}}}| j |¡ t |¡ q.| j ¡ || _ d S ©NzCA loop is being detached from a child watcher with pending handlers) rÁ r1 r, r- ÚRuntimeWarningÚvaluesrç r| r' r/ )r! rÏ ÚpidfdÚ_r r r r) s ý z PidfdChildWatcher.attach_loopc G sZ | j |¡}|d ur*|d ||f| j |< n,t |¡}| j || j|¡ |||f| j |< d S rµ )r1 rM r| Ú pidfd_openrÁ rÌ Ú_do_wait)r! rs rH rI Úexistingr: r r r rc ™ s z#PidfdChildWatcher.add_child_handlerc C s~ | j |¡\}}}| j |¡ zt |d¡\}}W n" tyT d}t d|¡ Y n 0 t |ƒ}t |¡ |||g|¢R Ž d S )Nr éÿ zJchild process pid %d exit status already read: will report returncode 255) r1 ÚpoprÁ rç r| ÚwaitpidÚChildProcessErrorr r Ú_compute_returncoder' )r! rs r: rH rI r; Ústatusrt r r r r= ¢ s ý zPidfdChildWatcher._do_waitc C sF z| j |¡\}}}W n ty* Y dS 0 | j |¡ t |¡ dS )NFT)r1 r@ rN rÁ rç r| r' )r! rs r: r; r r r r' µ s z&PidfdChildWatcher.remove_child_handlerN) r» r¼ r½ r¾ r r* r/ r` r' r) rc r= r' r r r r r q s r c C s2 t | ¡rt | ¡ S t | ¡r*t | ¡S | S d S r )r| Ú WIFSIGNALEDÚWTERMSIGÚ WIFEXITEDÚ WEXITSTATUS)rD r r r rC ¿ s rC c @ sD e Zd Zdd„ Zdd„ Zdd„ Zdd„ Zd d „ Zd d „ Zd d„ Z dS )ÚBaseChildWatcherc C s d | _ i | _d S r r0 rê r r r r Ï s zBaseChildWatcher.__init__c C s | d ¡ d S r r6 rê r r r r' Ó s zBaseChildWatcher.closec C s | j d uo| j ¡ S r r5 rê r r r r` Ö s zBaseChildWatcher.is_activec C s t ƒ ‚d S r r# )r! Ú expected_pidr r r Ú _do_waitpidÙ s z BaseChildWatcher._do_waitpidc C s t ƒ ‚d S r r# rê r r r Ú_do_waitpid_allÜ s z BaseChildWatcher._do_waitpid_allc C sf | j d ur$|d u r$| jr$t dt¡ | j d ur<| j tj¡ || _ |d urb| tj| j ¡ | ¡ d S r7 ) rÁ r1 r, r- r8 r+ r< ÚSIGCHLDrL Ú _sig_chldrL r( r r r r) ß s ý z BaseChildWatcher.attach_loopc C s^ z | ¡ W nL ttfy$ ‚ Y n6 tyX } z | j d|dœ¡ W Y d }~n d }~0 0 d S )Nú$Unknown exception in SIGCHLD handler)rý rþ )rL re rf rg rÁ rÿ r r r r rN ó s þzBaseChildWatcher._sig_chldN) r» r¼ r½ r r' r` rK rL r) rN r r r r rI Í s rI 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 ¡ tƒ ¡ d S r )r1 r/ r r' rê r# r r r' s zSafeChildWatcher.closec C s | S r r rê r r r r* s zSafeChildWatcher.__enter__c C s d S r r r+ r r r r/ s zSafeChildWatcher.__exit__c G s ||f| j |< | |¡ d S r )r1 rK r% r r r rc s z"SafeChildWatcher.add_child_handlerc C s( z| j |= W dS ty" Y dS 0 d S ©NTF©r1 rN r& r r r r' s z%SafeChildWatcher.remove_child_handlerc C s t | jƒD ]}| |¡ q d S r ©r* r1 rK r& r r r rL $ s z SafeChildWatcher._do_waitpid_allc C s zt |t j¡\}}W n& ty< |}d}t d|¡ Y n.0 |dkrJd S t|ƒ}| j ¡ rjt d||¡ z| j |¡\}}W n, t yª | j ¡ r¦tjd|dd Y n0 |||g|¢R Ž d S )Nr? ú8Unknown child process pid %d, will report returncode 255r ú$process %s exited with returncode %sú'Child watcher got an unexpected pid: %rTrû ) r| rA ÚWNOHANGrB r r rC rÁ ræ ré r1 r@ rN )r! rJ rs rD rt rH rI r r r rK ) s0 þ ÿ ÿ z SafeChildWatcher._do_waitpid) r» r¼ r½ r¾ r' r* r/ rc r' rL rK r¿ r r r# r r s r c sT e Zd ZdZ‡ fdd„Z‡ fdd„Zdd„ Zdd „ Zd d „ Zd d „ Z dd„ Z ‡ Z S )r aW 'Fast' child watcher implementation. This implementation reaps every terminated processes by calling os.waitpid(-1) directly, possibly breaking other code spawning processes and waiting for their termination. There is no noticeable overhead when handling a big number of children (O(1) each time a child terminates). c s$ t ƒ ¡ t ¡ | _i | _d| _d S rµ )r r Ú threadingÚLockÚ_lockÚ_zombiesÚ_forksrê r# r r r V s zFastChildWatcher.__init__c s" | j ¡ | j ¡ tƒ ¡ d S r )r1 r/ rZ r r' rê r# r r r' \ s zFastChildWatcher.closec C s< | j " | jd7 _| W d ƒ S 1 s.0 Y d S )Nr )rY r[ rê r r r r* a s zFastChildWatcher.__enter__c C st | j N | jd8 _| js"| js2W d ƒ d S t| jƒ}| j ¡ W d ƒ n1 sZ0 Y t d|¡ d S )Nr z5Caught subprocesses termination from unknown pids: %s)rY r[ rZ rB r/ r r )r! r, r- r. Zcollateral_victimsr r r r/ g s (þzFastChildWatcher.__exit__c G s| | j P z| j |¡}W n. tyF ||f| j|< Y W d ƒ d S 0 W d ƒ n1 s\0 Y |||g|¢R Ž d S r )rY rZ r@ rN r1 )r! rs rH rI rt r r r rc u s 2z"FastChildWatcher.add_child_handlerc C s( z| j |= W dS ty" Y dS 0 d S rP rQ r& r r r r' ƒ s z%FastChildWatcher.remove_child_handlerc C s zt dt j¡\}}W n ty* Y d S 0 |dkr8d S t|ƒ}| jŒ z| j |¡\}}W nN tyª | j r¢|| j |< | j ¡ r’t d||¡ Y W d ƒ q d }Y n0 | j ¡ rÄt d||¡ W d ƒ n1 sØ0 Y |d u rút d||¡ q |||g|¢R Ž q d S )Nr5 r z,unknown process %s exited with returncode %srT z8Caught subprocess termination from unknown pid: %d -> %d)r| rA rV rB rC rY r1 r@ rN r[ rZ rÁ ræ r ré r )r! rs rD rt rH rI r r r rL Š s: þ ÿ"þz FastChildWatcher._do_waitpid_all) r» r¼ r½ r¾ r r' r* r/ rc r' rL r¿ r r r# r r L s r c @ sh e Zd ZdZdd„ Zdd„ Zdd„ Zdd „ Zd d „ Zd d „ Z dd„ Z dd„ Z dd„ Z dd„ Z dd„ ZdS )r a~ A watcher that doesn't require running loop in the main thread. This implementation registers a SIGCHLD signal handler on instantiation (which may conflict with other code that install own handler for this signal). The solution is safe but it has a significant overhead when handling a big number of processes (*O(n)* each time a SIGCHLD is received). c C s i | _ d | _d S r )r1 Ú_saved_sighandlerrê r r r r È s z MultiLoopChildWatcher.__init__c C s | j d uS r )r\ rê r r r r` Ì s z MultiLoopChildWatcher.is_activec C sT | j ¡ | jd u rd S t tj¡}|| jkr:t d¡ nt tj| j¡ d | _d S )Nz+SIGCHLD handler was changed by outside code) r1 r/ r\ r< Ú getsignalrM rN r r )r! rR r r r r' Ï s zMultiLoopChildWatcher.closec C s | S r r rê r r r r* Û s z MultiLoopChildWatcher.__enter__c C s d S r r ©r! r2 Úexc_valÚexc_tbr r r r/ Þ s z MultiLoopChildWatcher.__exit__c G s& t ¡ }|||f| j|< | |¡ d S r )r Úget_running_loopr1 rK )r! rs rH rI rÏ r r r rc á s z'MultiLoopChildWatcher.add_child_handlerc C s( z| j |= W dS ty" Y dS 0 d S rP rQ r& r r r r' è s z*MultiLoopChildWatcher.remove_child_handlerc C sN | j d urd S t tj| j¡| _ | j d u r<t d¡ tj| _ t tjd¡ d S )NzaPrevious SIGCHLD handler was set by non-Python code, restore to default handler on watcher close.F)r\ r< rM rN r r rQ rD r( r r r r) ï s z!MultiLoopChildWatcher.attach_loopc C s t | jƒD ]}| |¡ q d S r rR r& r r r rL s z%MultiLoopChildWatcher._do_waitpid_allc C sà zt |t j¡\}}W n* ty@ |}d}t d|¡ d}Y n0 |dkrNd S t|ƒ}d}z| j |¡\}}}W n" t y’ tjd|dd Y nJ0 | ¡ r¬t d||¡ n0|rÆ| ¡ rÆt d ||¡ |j |||g|¢R Ž d S ) Nr? rS Fr TrU rû ú%Loop %r that handles pid %r is closedrT )r| rA rV rB r r rC r1 r@ rN Ú is_closedræ ré rr ) r! rJ rs rD rt Z debug_logrÏ rH rI r r r rK s6 þ ÿ ÿz!MultiLoopChildWatcher._do_waitpidc C sH z | ¡ W n6 ttfy$ ‚ Y n tyB tjddd Y n0 d S )NrO Trû )rL re rf rg r r )r! r r r r r rN ) s z MultiLoopChildWatcher._sig_chldN)r» r¼ r½ r¾ r r` r' r* r/ rc r' r) rL rK rN r r r r r µ s %r c @ sn e Zd ZdZdd„ Zdd„ Zdd„ Zdd „ Zd d „ Zd d „ Z e j fdd„Z dd„ Z dd„ Zdd„ Zdd„ ZdS )r aA Threaded child watcher implementation. The watcher uses a thread per process for waiting for the process finish. It doesn't require subscription on POSIX signal but a thread creation is not free. The watcher has O(1) complexity, its performance doesn't depend on amount of spawn processes. c C s t d¡| _i | _d S rµ )Ú itertoolsr¢ Ú _pid_counterÚ_threadsrê r r r r ? s z ThreadedChildWatcher.__init__c C s dS r r rê r r r r` C s z ThreadedChildWatcher.is_activec C s | ¡ d S r )Ú _join_threadsrê r r r r' F s zThreadedChildWatcher.closec C s. dd„ t | j ¡ ƒD ƒ}|D ] }| ¡ q dS )z%Internal: Join all non-daemon threadsc S s g | ]}| ¡ r|js|‘qS r )Úis_aliveÚdaemon©Ú.0Úthreadr r r Ú <listcomp>K s ÿz6ThreadedChildWatcher._join_threads.<locals>.<listcomp>N)r* rf r9 rà )r! Úthreadsrl r r r rg I s z"ThreadedChildWatcher._join_threadsc C s | S r r rê r r r r* P s z ThreadedChildWatcher.__enter__c C s d S r r r^ r r r r/ S s z ThreadedChildWatcher.__exit__c C s6 dd„ t | j ¡ ƒD ƒ}|r2|| j› dt| d d S )Nc S s g | ]}| ¡ r|‘qS r )rh rj r r r rm W s ÿz0ThreadedChildWatcher.__del__.<locals>.<listcomp>z0 has registered but not finished child processesr% )r* rf r9 r$ r. )r! r÷ rn r r r rø V s þz ThreadedChildWatcher.__del__c G sF t ¡ }tj| jdt| jƒ› ||||fdd}|| j|< | ¡ d S )Nzwaitpid-T)ÚtargetÚnamerI ri ) r ra rW ÚThreadrK Únextre rf Ústart)r! rs rH rI rÏ rl r r r rc ^ s ý z&ThreadedChildWatcher.add_child_handlerc C s dS r r r& r r r r' g s z)ThreadedChildWatcher.remove_child_handlerc C s d S r r r( r r r r) m s z ThreadedChildWatcher.attach_loopc C s˜ zt |d¡\}}W n& ty: |}d}t d|¡ Y n 0 t|ƒ}| ¡ rZt d||¡ | ¡ rrt d||¡ n|j |||g|¢R Ž | j |¡ d S )Nr r? rS rT rb ) r| rA rB r r rC ræ ré rc rr rf r@ )r! rÏ rJ rH rI rs rD rt r r r rK p s$ þ ÿz ThreadedChildWatcher._do_waitpidN)r» r¼ r½ r¾ r r` r' rg r* r/ r, r- rø rc r' r) rK r r r r r 2 s r c sH e Zd ZdZeZ‡ fdd„Zdd„ Z‡ fdd„Zdd „ Z d d „ Z ‡ Z S ) Ú_UnixDefaultEventLoopPolicyz:UNIX event loop policy with a watcher for child processes.c s t ƒ ¡ d | _d S r )r r Ú_watcherrê r# r r r s z$_UnixDefaultEventLoopPolicy.__init__c C s\ t jB | jd u r:tƒ | _t ¡ t ¡ u r:| j | jj ¡ W d ƒ n1 sN0 Y d S r ) r rY ru r rW Úcurrent_threadÚ main_threadr) Ú_localrÁ rê r r r Ú _init_watcher“ s z)_UnixDefaultEventLoopPolicy._init_watcherc s6 t ƒ |¡ | jdur2t ¡ t ¡ u r2| j |¡ dS )zÑSet the event loop. As a side effect, if a child watcher was set before, then calling .set_event_loop() from the main thread will call .attach_loop(loop) on the child watcher. N)r Úset_event_loopru rW rv rw r) r( r# r r rz š s ÿz*_UnixDefaultEventLoopPolicy.set_event_loopc C s | j du r| ¡ | j S )z~Get the watcher for child processes. If not yet set, a ThreadedChildWatcher object is automatically created. N)ru ry rê r r r r_ ¨ s z-_UnixDefaultEventLoopPolicy.get_child_watcherc C s | j dur| j ¡ || _ dS )z$Set the watcher for child processes.N)ru r' )r! ro r r r Úset_child_watcher² s z-_UnixDefaultEventLoopPolicy.set_child_watcher) r» r¼ r½ r¾ r Z _loop_factoryr ry rz r_ r{ r¿ r r r# r rt ‹ s rt )3r¾ rF r› rd r| rÝ r< r~ r r r( rW r, Ú r r r r r r r r r r Úlogr Ú__all__r Ú ImportErrorr ZBaseSelectorEventLoopr Z ReadTransportrV Z_FlowControlMixinZWriteTransportr] ZBaseSubprocessTransportrb r r rC rI r r r r ZBaseDefaultEventLoopPolicyrt r r r r r r Ú<module> sb ÿ NON5Ji}Y2