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selectors.cpython-312.pyc
CRhL t d Z ddlmZmZ ddlmZ ddlmZ ddlZddl Z ddl Z dZ dZ d Z ed g d Zd e_ d ej _ d ej _ dej" _ dej$ _ G d de Z G d de Z G d de Z G d de Z G d de Z ee d r G d d e Z ee d r G d d e Z ee d! r G d" d#e Z ee d$ r G d% d&e Z d' Z e d$ re Z y e d reZ y e d! reZ y e d reZ yeZ y)(z|Selectors module. This module allows high-level and efficient I/O multiplexing, built upon the `select` module primitives. )ABCMetaabstractmethod) namedtuple)MappingN c t | t r| }n t | j }|dk rt dj | |S # t t t f$ r t dj | dw xY w)zReturn a file descriptor from a file object. Parameters: fileobj -- file object or file descriptor Returns: corresponding file descriptor Raises: ValueError if the object is invalid zInvalid file object: {!r}Nr zInvalid file descriptor: {}) isinstanceintfilenoAttributeError TypeError ValueErrorformat)fileobjfds /usr/lib/python3.12/selectors.py_fileobj_to_fdr s '3 ?W^^%&B Av6==bABB I :6 ? $$*F7O5:> ? ?s A 0A? SelectorKey)r r eventsdatazSelectorKey(fileobj, fd, events, data) Object used to associate a file object to its backing file descriptor, selected event mask, and attached data. zFile object registered.zUnderlying file descriptor.z3Events that must be waited for on this file object.zvOptional opaque data associated to this file object. For example, this could be used to store a per-client session ID.c ( e Zd ZdZd Zd Zd Zd Zy)_SelectorMappingz)Mapping of file objects to selector keys.c || _ y N) _selector)selfselectors r __init__z_SelectorMapping.__init__? s ! c @ t | j j S r )lenr _fd_to_keyr s r __len__z_SelectorMapping.__len__B s 4>>,,--r c | j j | }| j j | S # t $ r t dj | d w xY wN{!r} is not registered)r _fileobj_lookupr# KeyErrorr )r r r s r __getitem__z _SelectorMapping.__getitem__E s[ O //8B>>,,R0 0 O3::7CD$ N Os 36 %Ac @ t | j j S r )iterr r# r$ s r __iter__z_SelectorMapping.__iter__L s DNN--..r N)__name__ __module__ __qualname____doc__r r% r+ r. r r r r < s 3".O/r r c t e Zd ZdZed d Zed Zd dZed d Zd Z d Z ed Z d Z d Z y) BaseSelectora- Selector abstract base class. A selector supports registering file objects to be monitored for specific I/O events. A file object is a file descriptor or any object with a `fileno()` method. An arbitrary object can be attached to the file object, which can be used for example to store context information, a callback, etc. A selector can use various implementations (select(), poll(), epoll()...) depending on the platform. The default `Selector` class uses the most efficient implementation on the current platform. Nc t )a3 Register a file object. Parameters: fileobj -- file object or file descriptor events -- events to monitor (bitwise mask of EVENT_READ|EVENT_WRITE) data -- attached data Returns: SelectorKey instance Raises: ValueError if events is invalid KeyError if fileobj is already registered OSError if fileobj is closed or otherwise is unacceptable to the underlying system call (if a system call is made) Note: OSError may or may not be raised NotImplementedErrorr r r r s r registerzBaseSelector.register_ s * "!r c t )aj Unregister a file object. Parameters: fileobj -- file object or file descriptor Returns: SelectorKey instance Raises: KeyError if fileobj is not registered Note: If fileobj is registered but has since been closed this does *not* raise OSError (even if the wrapped syscall does) r7 )r r s r unregisterzBaseSelector.unregisterv " "!r c J | j | | j ||| S )ay Change a registered file object monitored events or attached data. Parameters: fileobj -- file object or file descriptor events -- events to monitor (bitwise mask of EVENT_READ|EVENT_WRITE) data -- attached data Returns: SelectorKey instance Raises: Anything that unregister() or register() raises )r< r: r9 s r modifyzBaseSelector.modify s# }}Wfd33r c t )aq Perform the actual selection, until some monitored file objects are ready or a timeout expires. Parameters: timeout -- if timeout > 0, this specifies the maximum wait time, in seconds if timeout <= 0, the select() call won't block, and will report the currently ready file objects if timeout is None, select() will block until a monitored file object becomes ready Returns: list of (key, events) for ready file objects `events` is a bitwise mask of EVENT_READ|EVENT_WRITE r7 )r timeouts r selectzBaseSelector.select r= r c y)zmClose the selector. This must be called to make sure that any underlying resource is freed. Nr3 r$ s r closezBaseSelector.close s r c | j }| t d || S # t $ r t dj | dw xY w)zzReturn the key associated to a registered file object. Returns: SelectorKey for this file object NzSelector is closedr( )get_map RuntimeErrorr* r )r r mappings r get_keyzBaseSelector.get_key s[ ,,. ? 34 4 O7# # O3::7CD$ N Os $ %A c t )z2Return a mapping of file objects to selector keys.r7 r$ s r rF zBaseSelector.get_map s "!r c | S r r3 r$ s r __enter__zBaseSelector.__enter__ s r c $ | j y r )rD )r argss r __exit__zBaseSelector.__exit__ s r r )r/ r0 r1 r2 r r: r< r? rB rD rI rF rL rO r3 r r r5 r5 P sq " ", " "$4" " "$ O " "r r5 ) metaclassc D e Zd ZdZd Zd Zd dZd Zd dZd Z d Z d Z y) _BaseSelectorImplz Base selector implementation.c 2 i | _ t | | _ y r )r# r _mapr$ s r r z_BaseSelectorImpl.__init__ s $T* r c t | S # t $ r? | j j D ] }|j |u s|j c cY S w xY w)al Return a file descriptor from a file object. This wraps _fileobj_to_fd() to do an exhaustive search in case the object is invalid but we still have it in our map. This is used by unregister() so we can unregister an object that was previously registered even if it is closed. It is also used by _SelectorMapping. )r r r# valuesr r r r keys r r) z!_BaseSelectorImpl._fileobj_lookup sR !'* * --/;;') 66M 0 s 4AAANc F |r|t t z z rt dj | t || j | || }|j | j v r%t dj ||j || j |j < |S )NzInvalid events: {!r}z"{!r} (FD {}) is already registered) EVENT_READ EVENT_WRITEr r r r) r r# r* r r r r rX s r r: z_BaseSelectorImpl.register s FzK'?%@ @ 3 : :6 BC C'4#7#7#@&$O 66T__ $? "F7CFF 35 5 #& r c | j j | j | }|S # t $ r t dj | d w xY wr' )r# popr) r* r rW s r r< z _BaseSelectorImpl.unregister sZ O//%%d&:&:7&CDC O3::7CD$ N Os *. %Ac r | j | j | }||j k7 r&| j | | j ||| }|S ||j k7 r+|j | }|| j |j < |S # t $ r t dj | d w xY w)Nr( )r ) r# r) r* r r r< r: r _replacer r\ s r r? z_BaseSelectorImpl.modify s O//$"6"6w"?@C SZZ OOG $--6C SXX ,,D,)C&)DOOCFF # O3::7CD$ N Os B %B6c F | j j d | _ y r )r# clearrT r$ s r rD z_BaseSelectorImpl.close s r c | j S r )rT r$ s r rF z_BaseSelectorImpl.get_map s yyr c @ | j | S # t $ r Y yw xY w)zReturn the key associated to a given file descriptor. Parameters: fd -- file descriptor Returns: corresponding key, or None if not found N)r# r* )r r s r _key_from_fdz _BaseSelectorImpl._key_from_fd s( ??2& & s r ) r/ r0 r1 r2 r r) r: r< r? rD rF re r3 r r rR rR s- '+ & r rR c e Zd ZdZ fdZd fd Z fdZej dk( rddZ n e j Z ddZ xZ S ) SelectSelectorzSelect-based selector.c ^ t | t | _ t | _ y r )superr set_readers_writersr __class__s r r zSelectSelector.__init__% s r c t | ||| }|t z r%| j j |j |t z r%| j j |j |S r )ri r: rZ rk addr r[ rl )r r r r rX rn s r r: zSelectSelector.register* sW g w5 J MM cff % K MM cff % r c t | | }| j j |j | j j |j |S r )ri r< rk discardr rl r r rX rn s r r< zSelectSelector.unregister2 sC g ) cff% cff% r win32c J t j |||| \ }}}|||z g fS r )rB )r rw_rA xs r _selectzSelectSelector._select9 s, mmAq!W5GAq!a!eR< r c |d n t |d }g } | j | j | j g | \ }}}t | }t | }||z D ]R }d}||v r |t z }||v r |t z }| j | }|s3|j |||j z f T |S # t $ r |cY S w xY wNr ) maxrz rk rl InterruptedErrorrj rZ r[ re appendr ) r rA readyrv rw rx r r rX s r rB zSelectSelector.select? s !/$s7A ll4==$--WMGAq! F Fa%BFQw*$Qw+%##B'C c6CJJ#6 78 L s ,B2 2 C ?C r ) r/ r0 r1 r2 r r: r< sysplatformrz rB __classcell__rn s @r rg rg " s8 ||w --r rg c X e Zd ZdZdZdZdZ fdZd fd Z fdZ d fd Z ddZ xZ S ) _PollLikeSelectorz<Base class shared between poll, epoll and devpoll selectors.Nc L t | | j | _ y r )ri r _selector_clsr rm s r r z_PollLikeSelector.__init__[ s ++-r c t | ||| }d}|t z r|| j z }|t z r|| j z } | j j |j | |S # t | ! | xY wr| ) ri r: rZ _EVENT_READr[ _EVENT_WRITEr r r< )r r r r rX poller_eventsrn s r r: z_PollLikeSelector.register_ s g w5 J T - - -M K T . . .M NN # #CFFM : G w ' s &A. .B c t | | } | j j |j |S # t $ r Y |S w xY wr )ri r< r r OSErrorrs s r r< z _PollLikeSelector.unregisterm sO g ) NN % %cff - s %9 AAc | j | j | }d}||j k7 r[d}|t z r|| j z }|t z r|| j z } | j j |j | d}||j k7 rd}|r,|j || }|| j |j < |S # t $ r t |d d w xY w# t | 1 | xY w)Nz is not registeredFr T)r r )r# r) r* r rZ r r[ r r r? r ri r< r r` )r r r r rX changedselector_eventsrn s r r? z_PollLikeSelector.modifyw s G//$"6"6w"?@C SZZ O " 4#3#33 # 4#4#44 %%cffo> G 388 G ,,f4,8C&)DOOCFF # - Gg[(:;<$ F G "7+s C %&C* C'*C<c |d }n |dk rd}nt j |dz }g } | j j | }|D ]m \ }}d}|| j z r |t z }|| j z r |t z }| j | }|sN|j |||j z f o |S # t $ r |cY S w xY w)Nr @@) mathceilr pollr~ r r[ r rZ re r r )r rA r fd_event_listr eventr rX s r rB z_PollLikeSelector.select s ?G \G ii# .G NN / / 8M 'IBF((((+%))))*$##B'C c6CJJ#6 78 ' L s B8 8 CCr ) r/ r0 r1 r2 r r r r r: r< r? rB r r s @r r r U s. FMKL. 6r r r c X e Zd ZdZej Zej Zej Z y) PollSelectorzPoll-based selector.N) r/ r0 r1 r2 rB r r POLLINr POLLOUTr r3 r r r r s " mm ~~ r r epollc x e Zd ZdZej Zej Zej Z d Z ddZ fdZ xZ S ) EpollSelectorzEpoll-based selector.c 6 | j j S r r r r$ s r r zEpollSelector.fileno >>((* *r c |d}n#|dk rd}nt j |dz dz }t t | j d }g } | j j || }|D ]u \ }}d}|t j z r |t z }|t j z r |t z }| j | }|sV|j |||j z f w |S # t $ r |cY S w xY w)Nr r gMbP?r )r r r} r" r# r r r~ rB EPOLLINr[ EPOLLOUTrZ re r r ) r rA max_evr r r r r rX s r rB zEpollSelector.select s A ))GcM2T9 T__-q1FE $ 3 3GV D + EFNN?*k)FFOO++j(F''+LL#v ':!;< + L $ s C# # C10C1c V | j j t | y r r rD ri rm s r rD zEpollSelector.close NN " GMOr r )r/ r0 r1 r2 rB r r r r r r r rD r r s @r r r s6 # nn + @ r r devpollc p e Zd ZdZej Zej Zej Z d Z fdZ xZ S )DevpollSelectorzSolaris /dev/poll selector.c 6 | j j S r r r$ s r r zDevpollSelector.fileno r r c V | j j t | y r r rm s r rD zDevpollSelector.close r r )r/ r0 r1 r2 rB r r r r r r r rD r r s @r r r s0 ) mm ~~ + r r kqueuec P e Zd ZdZ fdZd Zd fd Z fdZddZ fdZ xZ S ) KqueueSelectorzKqueue-based selector.c b t | t j | _ d| _ y r| )ri r rB r r _max_eventsrm s r r zKqueueSelector.__init__ s# G #]]_DN D r c 6 | j j S r r r$ s r r zKqueueSelector.fileno r r c : t | ||| } |t z rpt j |j t j t j }| j j |gdd | xj dz c_ |t z rpt j |j t j t j }| j j |gdd | xj dz c_ |S # t | 5 | xY wNr r )ri r: rZ rB keventr KQ_FILTER_READ KQ_EV_ADDr controlr r[ KQ_FILTER_WRITEr< )r r r r rX kevrn s r r: zKqueueSelector.register s '"7FD9C J& --0E0E(.(8(8:CNN**C5!Q7$$)$K' --0F0F(.(8(8:CNN**C5!Q7$$)$ J "7+s C2D Dc x t | | }|j t z rqt j |j t j t j }| xj dz c_ | j j |gdd |j t z rst j |j t j t j }| xj dz c_ | j j |gdd |S |S # t $ r Y w xY w# t $ r Y |S w xY w)Nr r )ri r< r rZ rB r r r KQ_EV_DELETEr r r r r[ r )r r rX r rn s r r< zKqueueSelector.unregister s '$W-CzzJ& mmCFFF,A,A$*$7$79 A% NN**C5!Q7 zzK' mmCFFF,B,B$*$7$79 A% NN**C5!Q7 J3J Js$ 7 D ; D, D)(D), D98D9c |d n t |d }| j xs d}g } | j j d || }|D ] }|j }|j }d}|t j k( r |t z }|t j k( r |t z }| j | } | si|j | || j z f |S # t $ r |cY S w xY wr )r} r r r r~ identfilterrB r rZ r r[ re r r ) r rA r r kev_listr r flagr rX s r rB zKqueueSelector.select. s %od3w?G %%*FE >>11$H YYzz6000j(F6111k)F''+LL#v ':!;< L $ s C C C c V | j j t | y r r rm s r rD zKqueueSelector.closeG r r r ) r/ r0 r1 r2 r r r: r< rB rD r r s @r r r s) $ ! + $ . 2 r r c t t | d }|y | }| dk( r|j d y|j y# t $ r Y yw xY w)zJCheck if we can use the selector depending upon the operating system. NFr r T)getattrrB r rD r )methodr selector_objs r _can_user L se vvt,H z V a s A A AA) r2 abcr r collectionsr collections.abcr r rB r rZ r[ r r r r r r r r5 rR rg r hasattrr r r r r DefaultSelectorr3 r r <module>r ss ( " # 2 (KL 8 6 R E /w /({W {|Q Qh0& 0fW) Wt 66&( & 67+ ) + \ 69 + 68 O * O d4 H$O g#O i%O f"O$Or