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selectors.pyo
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Z n d! � Z" d" � Z# d S(& i����N( t namedtuplet Mappingi i t SelectorErrorc B s# e Z d � Z d � Z d � Z RS( c C s t t | � j � | | _ d S( N( t superR t __init__t errno( t selft errcode( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR s c C s d j | j � S( Ns <SelectorError errno={0}>( t formatR ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt __repr__" s c C s | j � S( N( R ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt __str__% s ( t __name__t __module__R R R ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR s c C s� t | t � r | } nH y t | j � � } Wn/ t t t f k r_ t d j | � � � n X| d k r� t d j | � � � n | S( sl Return a file descriptor from a file object. If given an integer will simply return that integer back. s Invalid file object: {0!r}i s Invalid file descriptor: {0}( t isinstancet intt filenot AttributeErrort TypeErrort ValueErrorR ( t fileobjt fd( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt _fileobj_to_fd) s i i c O sd y | | | � SWnL t t t j f k r_ } d } t | d � rP | j } n t | � � n Xd S( s� This is the short-circuit version of the below logic because in Python 3.5+ all system calls automatically restart and recalculate their timeouts. R N( t OSErrort IOErrort selectt errort Nonet hasattrR R ( t funct _t argst kwargst eR ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt _syscall_wrapper; s c O s� | j d d � } | d k r- d } t } n. t | � } | d k rN d } n t � | } t | � } | r� d | k r� t d � � n t } x5| t k r�y | | | � } Wq� t t t j f k r�} d } t | d � r� | j } n t | d � r| j d } n | t j k p8t t d � o8| t j k } | r�| d k r� t � } | | k rwt d t j � � n | r�d | k r�| | | d <q�q�q� q� n | r�t | � � q�� q� Xq� W| S( s� Wrapper function for syscalls that could fail due to EINTR. All functions should be retried if there is time left in the timeout in accordance with PEP 475. t timeoutg s4 Timeout must be in args or kwargs to be recalculatedR R i t WSAEINTRN( t getR t Falset floatt monotonict listR t _SYSCALL_SENTINELR R R R R R R t EINTRR# t ETIMEDOUTR ( R t recalc_timeoutR R R" t expirest resultR R t is_interruptt current_time( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR! G sJ t SelectorKeyR R t eventst datat _SelectorMappingc B s2 e Z d Z d � Z d � Z d � Z d � Z RS( s* Mapping of file objects to selector keys c C s | | _ d S( N( t _selector( R t selector( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s c C s t | j j � S( N( t lenR5 t _fd_to_key( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt __len__� s c C sQ y$ | j j | � } | j j | SWn& t k rL t d j | � � � n Xd S( Ns {0!r} is not registered.( R5 t _fileobj_lookupR8 t KeyErrorR ( R R R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt __getitem__� s c C s t | j j � S( N( t iterR5 R8 ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt __iter__� s ( R R t __doc__R R9 R< R> ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR4 � s t BaseSelectorc B s� e Z d Z d � Z d � Z d d � Z d � Z d d � Z d d � Z d � Z d � Z d � Z d � Z d � Z d � Z RS( s/ Abstract Selector 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 info, a callback, etc. A selector can use various implementations (select(), poll(), epoll(), and kqueue()) depending on the platform. The 'DefaultSelector' class uses the most efficient implementation for the current platform. c C s i | _ t | � | _ d S( N( R8 R4 t _map( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s c C sY y t | � SWnD t k rT x- | j j � D] } | j | k r. | j Sq. W� n Xd S( sa 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. Used by unregister() so we can unregister an object that was previously registered even if it is closed. It is also used by _SelectorMapping N( R R R8 t valuesR R ( R R t key( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR: � s c C s� | s | t t B@r. t d j | � � � n t | | j | � | | � } | j | j k r| t d j | | j � � � n | | j | j <| S( s8 Register a file object for a set of events to monitor. s Invalid events: {0!r}s$ {0!r} (FD {1}) is already registered( t EVENT_READt EVENT_WRITER R R1 R: R R8 R; ( R R R2 R3 RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt register� s c C s� y | j j | j | � � } Wn� t k rG t d j | � � � n� t j k r� } | j t j k rq � q� xV | j j � D], } | j | k r� | j j | j � Pq� q� Wt d j | � � � n X| S( s0 Unregister a file object from being monitored. s {0!r} is not registered( R8 t popR: R; R t socketR R t EBADFRB R R ( R R RC R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt unregister� s c C s� y | j | j | � } Wn& t k rB t d j | � � � n X| | j k rw | j | � | j | | | � } n4 | | j k r� | j d | � } | | j | j <n | S( s< Change a registered file object monitored events and data. s {0!r} is not registeredR3 ( R8 R: R; R R2 RJ RF R3 t _replaceR ( R R R2 R3 RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt modify� s c C s t � � d S( sj Perform the actual selection until some monitored file objects are ready or the timeout expires. N( t NotImplementedError( R R" ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s c C s | j j � d | _ d S( sd Close the selector. This must be called to ensure that all underlying resources are freed. N( R8 t clearR RA ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt close� s c C s` | j � } | d k r' t d � � n y | | SWn& t k r[ t d j | � � � n Xd S( s: Return the key associated with a registered file object. s Selector is closeds {0!r} is not registeredN( t get_mapR t RuntimeErrorR; R ( R R t mapping( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt get_key s c C s | j S( s3 Return a mapping of file objects to selector keys ( RA ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRP s c C s( y | j | SWn t k r# d SXd S( s_ Return the key associated to a given file descriptor Return None if it is not found. N( R8 R; R ( R R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt _key_from_fd s c C s | S( N( ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt __enter__ s c G s | j � d S( N( RO ( R R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt __exit__ s N( R R R? R R: R RF RJ RL R RO RS RP RT RU RV ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR@ � s R t SelectSelectorc B sD e Z d Z d � Z d d � Z d � Z d d � Z d d � Z RS( s Select-based selector. c C s/ t t | � j � t � | _ t � | _ d S( N( R RW R t sett _readerst _writers( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR ! s c C sb t t | � j | | | � } | t @r> | j j | j � n | t @r^ | j j | j � n | S( N( R RW RF RD RY t addR RE RZ ( R R R2 R3 RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRF & s c C sB t t | � j | � } | j j | j � | j j | j � | S( N( R RW RJ RY t discardR RZ ( R R RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRJ . s c C s t j | | g | � S( s? Wrapper for select.select because timeout is a positional arg ( R ( R t rt wR" ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt _select4 s c C s t | j � r$ t | j � r$ g S| d k r6 d n t | d � } g } t | j t | j | j | � \ } } } t | � } t | � } x| | | BD]p } d } | | k r� | t O} n | | k r� | t O} n | j | � } | r� | j | | | j @f � q� q� W| S( Ng i ( R7 RY RZ R t maxR! R_ t TrueRX RD RE RT t appendR2 ( R R" t readyR] R^ R R R2 RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR 8 s$ ! !N( R R R? R R RF RJ R_ R ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRW s t pollt PollSelectorc B sD e Z d Z d � Z d d � Z d � Z d d � Z d d � Z RS( s Poll-based selector c C s& t t | � j � t j � | _ d S( N( R Re R R Rd t _poll( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR S s c C sr t t | � j | | | � } d } | t @r> | t j O} n | t @rX | t j O} n | j j | j | � | S( Ni ( R Re RF RD R t POLLINRE t POLLOUTRf R ( R R R2 R3 RC t event_mask( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRF W s c C s/ t t | � j | � } | j j | j � | S( N( R Re RJ Rf R ( R R RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRJ a s c C sM | d k r7 | d k r! d } q7 t j | d � } n | j j | � } | S( sj Wrapper function for select.poll.poll() so that _syscall_wrapper can work with only seconds. i g @�@N( R t matht ceilRf Rd ( R R" R. ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt _wrap_pollf s c C s� g } t | j t d | �} x� | D]z \ } } d } | t j @rR | t O} n | t j @rm | t O} n | j | � } | r% | j | | | j @f � q% q% W| S( NR" i ( R! Rl Ra R Rg RE Rh RD RT Rb R2 ( R R" Rc t fd_eventsR Ri R2 RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR t s !N( R R R? R R RF RJ Rl R ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRe Q s t epollt EpollSelectorc B sJ e Z d Z d � Z d � Z d d � Z d � Z d d � Z d � Z RS( s Epoll-based selector c C s& t t | � j � t j � | _ d S( N( R Ro R R Rn t _epoll( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s c C s | j j � S( N( Rp R ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s c C sx t t | � j | | | � } d } | t @r> | t j O} n | t @rX | t j O} n t | j j t | j | � | S( Ni ( R Ro RF RD R t EPOLLINRE t EPOLLOUTR! Rp R% R ( R R R2 R3 RC t events_mask( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRF � s c C sM t t | � j | � } y t | j j t | j � Wn t k rH n X| S( N( R Ro RJ R! Rp R% R R ( R R RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRJ � s c C s | d k rG | d k r! d } n t j | d � d } t | � } n d } t t | j � d � } g } t | j j t d | d | �} x� | D]z \ } } d } | t j @r� | t O} n | t j @r� | t O} n | j | � } | r� | j | | | j @f � q� q� W| S( Ni g g @�@g����MbP?g �i R" t maxevents( R Rj Rk R& R` R7 R8 R! Rp Rd Ra R Rq RE Rr RD RT Rb R2 ( R R" t max_eventsRc Rm R Ri R2 RC ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s* !c C s$ | j j � t t | � j � d S( N( Rp RO R Ro ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRO � s N( R R R? R R R RF RJ R RO ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRo � s !t kqueuet KqueueSelectorc B sJ e Z d Z d � Z d � Z d d � Z d � Z d d � Z d � Z RS( s Kqueue / Kevent-based selector c C s& t t | � j � t j � | _ d S( N( R Rw R R Rv t _kqueue( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s c C s | j j � S( N( Rx R ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s c C s� t t | � j | | | � } | t @rh t j | j t j t j � } t | j j t | g d d � n | t @r� t j | j t j t j � } t | j j t | g d d � n | S( Ni ( R Rw RF RD R t keventR t KQ_FILTER_READt KQ_EV_ADDR! Rx t controlR% RE t KQ_FILTER_WRITE( R R R2 R3 RC Ry ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRF � s " "c C s� t t | � j | � } | j t @r} t j | j t j t j � } y# t | j j t | g d d � Wq} t k ry q} Xn | j t @r� t j | j t j t j � } y# t | j j t | g d d � Wq� t k r� q� Xn | S( Ni ( R Rw RJ R2 RD R Ry R Rz t KQ_EV_DELETER! Rx R| R% R RE R} ( R R RC Ry ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRJ � s$ # # c C s9 | d k r t | d � } n t | j � d } i } t | j j t d | | � } x� | D]� } | j } | j } d } | t j k r� | t O} n | t j k r� | t O} n | j | � } | r\ | j | k r� | | | j @f | | j <q%| | j d } | | | B| j @f | | j <q\ q\ Wt | j � � S( Ni i i ( R R` R7 R8 R! Rx R| Ra t identt filterR Rz RD R} RE RT R R2 R( RB ( R R" Ru t ready_fdst kevent_listRy R Ri R2 RC t old_events( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyR � s* %c C s$ | j j � t t | � j � d S( N( Rx RO R Rw ( R ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRO s N( R R R? R R R RF RJ R RO ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyRw � s c C sg yF | d k r+ t j � } | j d � n t t | � � j � t SWn t t f k rb } t SXd S( s Checks that select structs can be allocated by the underlying operating system, not just advertised by the select module. We don't check select() because we'll be hopeful that most platforms that don't have it available will not advertise it. (ie: GAE) Rd i N( R Rd t getattrRO Ra R R R% ( t structt pR ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt _can_allocate s c C sy t d k rr t d � r! t a qr t d � r6 t a qr t d � rK t a qr t t d � rc t a qr t d � � n t � S( s� This function serves as a first call for DefaultSelector to detect if the select module is being monkey-patched incorrectly by eventlet, greenlet, and preserve proper behavior. Rv Rn Rd R s! Platform does not have a selectorN( t _DEFAULT_SELECTORR R� Rw Ro Re R R RW R ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt DefaultSelector5 s i i ( i i ($ R Rj R RH t syst timet collectionsR R R' R t ImportErrorRD RE Ra t HAS_SELECTt objectR) R R� t ExceptionR R t version_infoR! R1 R4 R@ R RW Re Ro Rw R% R� R� ( ( ( sF /usr/lib/python2.7/site-packages/pip/_vendor/urllib3/util/selectors.pyt <module> sF 8�14BR
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