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Gd+ d, � d, e � Z" d S)-z"Brian Quinlan (brian@sweetapp.com)� N�FIRST_COMPLETED�FIRST_EXCEPTION� ALL_COMPLETED� _AS_COMPLETED�PENDING�RUNNING� CANCELLED�CANCELLED_AND_NOTIFIED�FINISHED�pending�running� cancelled�finishedzconcurrent.futuresc @ s e Z d Z d Z d S)�Errorz-Base class for all future-related exceptions.N)�__name__� __module__� __qualname__�__doc__� r r �=/opt/alt/python34/lib64/python3.4/concurrent/futures/_base.pyr , s r c @ s e Z d Z d Z d S)�CancelledErrorzThe Future was cancelled.N)r r r r r r r r r 0 s r c @ s e Z d Z d Z d S)� TimeoutErrorz*The operation exceeded the given deadline.N)r r r r r r r r r 4 s r c @ sF e Z d Z d Z d d � Z d d � Z d d � Z d d � Z d S) �_Waiterz;Provides the event that wait() and as_completed() block on.c C s t j � | _ g | _ d S)N)� threadingZEvent�event�finished_futures)�selfr r r �__init__: s z_Waiter.__init__c C s | j j | � d S)N)r �append)r �futurer r r � add_result> s z_Waiter.add_resultc C s | j j | � d S)N)r r )r r r r r � add_exceptionA s z_Waiter.add_exceptionc C s | j j | � d S)N)r r )r r r r r � add_cancelledD s z_Waiter.add_cancelledN)r r r r r r r! r" r r r r r 8 s r c s^ e Z d Z d Z � f d d � Z � f d d � Z � f d d � Z � f d d � Z � S) �_AsCompletedWaiterzUsed by as_completed().c s& t t | � j � t j � | _ d S)N)�superr# r r �Lock�lock)r )� __class__r r r J s z_AsCompletedWaiter.__init__c s7 | j �( t t | � j | � | j j � Wd QXd S)N)r& r$ r# r r �set)r r )r' r r r N s z _AsCompletedWaiter.add_resultc s7 | j �( t t | � j | � | j j � Wd QXd S)N)r& r$ r# r! r r( )r r )r' r r r! S s z _AsCompletedWaiter.add_exceptionc s7 | j �( t t | � j | � | j j � Wd QXd S)N)r& r$ r# r" r r( )r r )r' r r r" X s z _AsCompletedWaiter.add_cancelled)r r r r r r r! r" r r )r' r r# G s r# c sL e Z d Z d Z � f d d � Z � f d d � Z � f d d � Z � S)�_FirstCompletedWaiterz*Used by wait(return_when=FIRST_COMPLETED).c s! t � j | � | j j � d S)N)r$ r r r( )r r )r' r r r ` s z _FirstCompletedWaiter.add_resultc s! t � j | � | j j � d S)N)r$ r! r r( )r r )r' r r r! d s z#_FirstCompletedWaiter.add_exceptionc s! t � j | � | j j � d S)N)r$ r" r r( )r r )r' r r r" h s z#_FirstCompletedWaiter.add_cancelled)r r r r r r! r" r r )r' r r) ] s r) c sj e Z d Z d Z � f d d � Z d d � Z � f d d � Z � f d d � Z � f d d � Z � S) �_AllCompletedWaiterz<Used by wait(return_when=FIRST_EXCEPTION and ALL_COMPLETED).c s2 | | _ | | _ t j � | _ t � j � d S)N)�num_pending_calls�stop_on_exceptionr r% r& r$ r )r r+ r, )r' r r r o s z _AllCompletedWaiter.__init__c C s< | j �- | j d 8_ | j s2 | j j � n Wd QXd S)N� )r& r+ r r( )r r r r �_decrement_pending_callsu s z,_AllCompletedWaiter._decrement_pending_callsc s t � j | � | j � d S)N)r$ r r. )r r )r' r r r { s z _AllCompletedWaiter.add_resultc s7 t � j | � | j r) | j j � n | j � d S)N)r$ r! r, r r( r. )r r )r' r r r! s z!_AllCompletedWaiter.add_exceptionc s t � j | � | j � d S)N)r$ r" r. )r r )r' r r r" � s z!_AllCompletedWaiter.add_cancelled) r r r r r r. r r! r" r r )r' r r* l s r* c @ s: e Z d Z d Z d d � Z d d � Z d d � Z d S) �_AcquireFutureszDA context manager that does an ordered acquire of Future conditions.c C s t | d t �| _ d S)N�key)�sorted�id�futures)r r3 r r r r � s z_AcquireFutures.__init__c C s% x | j D] } | j j � q Wd S)N)r3 � _condition�acquire)r r r r r � __enter__� s z_AcquireFutures.__enter__c G s% x | j D] } | j j � q Wd S)N)r3 r4 �release)r �argsr r r r �__exit__� s z_AcquireFutures.__exit__N)r r r r r r6 r9 r r r r r/ � s r/ c C s� | t k r t � } n� | t k r0 t � } nk t d d � | D� � } | t k rj t | d d �} n1 | t k r� t | d d �} n t d | � � x | D] } | j j | � q� W| S)Nc s s$ | ] } | j t t g k Vq d S)N)�_stater r )�.0�fr r r � <genexpr>� s z._create_and_install_waiters.<locals>.<genexpr>r, TFz Invalid return condition: %r) r r# r r) �sumr r* r � ValueError�_waitersr )�fs� return_when�waiterZ pending_countr< r r r �_create_and_install_waiters� s rD c c s{ | d k r | t j � } n t | � } t | � �7 t d d � | D� � } | | } t | t � } Wd QXz� | Dd Hx� | r@| d k r� d } nA | t j � } | d k r� t d t | � t | � f � � n | j j | � | j �$ | j } g | _ | j j � Wd QXx | D] } | V| j | � q!Wq WWd x. | D]& } | j � | j j | � Wd QXqLWXd S)an An iterator over the given futures that yields each as it completes. Args: fs: The sequence of Futures (possibly created by different Executors) to iterate over. timeout: The maximum number of seconds to wait. If None, then there is no limit on the wait time. Returns: An iterator that yields the given Futures as they complete (finished or cancelled). If any given Futures are duplicated, they will be returned once. Raises: TimeoutError: If the entire result iterator could not be generated before the given timeout. Nc s s* | ] } | j t t g k r | Vq d S)N)r: r r )r; r< r r r r= � s z as_completed.<locals>.<genexpr>r z %d (of %d) futures unfinished)�timer( r/ rD r r �lenr �waitr& r �clear�remover4 r@ ) rA �timeout�end_timer r rC Z wait_timeoutr r< r r r � as_completed� s: rL �DoneAndNotDoneFuturesz done not_donec C s2 t | � �� t d d � | D� � } t | � | } | t k rU | rU t | | � S| t k r� | r� t d d � | D� � r� t | | � Sn t | � t | � k r� t | | � St | | � } Wd QX| j j | � x. | D]& } | j � | j j | � Wd QXq� W| j | j � t | t | � | � S)a Wait for the futures in the given sequence to complete. Args: fs: The sequence of Futures (possibly created by different Executors) to wait upon. timeout: The maximum number of seconds to wait. If None, then there is no limit on the wait time. return_when: Indicates when this function should return. The options are: FIRST_COMPLETED - Return when any future finishes or is cancelled. FIRST_EXCEPTION - Return when any future finishes by raising an exception. If no future raises an exception then it is equivalent to ALL_COMPLETED. ALL_COMPLETED - Return when all futures finish or are cancelled. Returns: A named 2-tuple of sets. The first set, named 'done', contains the futures that completed (is finished or cancelled) before the wait completed. The second set, named 'not_done', contains uncompleted futures. c s s* | ] } | j t t g k r | Vq d S)N)r: r r )r; r< r r r r= s zwait.<locals>.<genexpr>c s s4 | ]* } | j � r | j � d k r | Vq d S)N)r � exception)r; r< r r r r= s N)r/ r( r rM r �anyrF rD r rG r4 r@ rI �updater )rA rJ rB �doneZnot_donerC r< r r r rG � s" rG c @ s� e Z d Z d Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d d � Z d d d � Z d d � Z d d � Z d d � Z d S) �Futurez5Represents the result of an asynchronous computation.c C s@ t j � | _ t | _ d | _ d | _ g | _ g | _ d S)z8Initializes the future. Should not be called by clients.N) r Z Conditionr4 r r: �_result� _exceptionr@ �_done_callbacks)r r r r r s zFuture.__init__c C sK xD | j D]9 } y | | � Wq t k rB t j d | � Yq Xq Wd S)Nz!exception calling callback for %r)rU � Exception�LOGGERrN )r �callbackr r r �_invoke_callbacks& s zFuture._invoke_callbacksc C s� | j �� | j t k r | j rO d t t | � � t | j | j j j f Sd t t | � � t | j | j j j f Sn d t t | � � t | j f SWd QXd S)Nz!<Future at %s state=%s raised %s>z#<Future at %s state=%s returned %s>z<Future at %s state=%s>) r4 r: r rT �hexr2 �_STATE_TO_DESCRIPTION_MAPr' r rS )r r r r �__repr__- s zFuture.__repr__c C sf | j �M | j t t g k r# d S| j t t g k r< d St | _ | j j � Wd QX| j � d S)z�Cancel the future if possible. Returns True if the future was cancelled, False otherwise. A future cannot be cancelled if it is running or has already completed. FTN)r4 r: r r r r � notify_allrY )r r r r �cancel> s z Future.cancelc C s' | j � | j t t g k SWd QXd S)z(Return True if the future was cancelled.N)r4 r: r r )r r r r r Q s zFuture.cancelledc C s! | j � | j t k SWd QXd S)z1Return True if the future is currently executing.N)r4 r: r )r r r r r V s zFuture.runningc C s* | j � | j t t t g k SWd QXd S)z>Return True of the future was cancelled or finished executing.N)r4 r: r r r )r r r r rQ [ s z Future.donec C s | j r | j � n | j Sd S)N)rT rS )r r r r Z __get_result` s zFuture.__get_resultc C sJ | j �1 | j t t t g k r6 | j j | � d SWd QX| | � d S)a% Attaches a callable that will be called when the future finishes. Args: fn: A callable that will be called with this future as its only argument when the future completes or is cancelled. The callable will always be called by a thread in the same process in which it was added. If the future has already completed or been cancelled then the callable will be called immediately. These callables are called in the order that they were added. N)r4 r: r r r rU r )r �fnr r r �add_done_callbackf s zFuture.add_done_callbackNc C s� | j �� | j t t g k r+ t � � n | j t k rD | j � S| j j | � | j t t g k ru t � � n" | j t k r� | j � St � � Wd QXd S)aB Return the result of the call that the future represents. Args: timeout: The number of seconds to wait for the result if the future isn't done. If None, then there is no limit on the wait time. Returns: The result of the call that the future represents. Raises: CancelledError: If the future was cancelled. TimeoutError: If the future didn't finish executing before the given timeout. Exception: If the call raised then that exception will be raised. N) r4 r: r r r r �_Future__get_resultrG r )r rJ r r r �resultw s z Future.resultc C s� | j �� | j t t g k r+ t � � n | j t k rA | j S| j j | � | j t t g k rr t � � n | j t k r� | j St � � Wd QXd S)aU Return the exception raised by the call that the future represents. Args: timeout: The number of seconds to wait for the exception if the future isn't done. If None, then there is no limit on the wait time. Returns: The exception raised by the call that the future represents or None if the call completed without raising. Raises: CancelledError: If the future was cancelled. TimeoutError: If the future didn't finish executing before the given timeout. N) r4 r: r r r r rT rG r )r rJ r r r rN � s zFuture.exceptionc C s� | j �� | j t k rG t | _ x | j D] } | j | � q, Wd S| j t k rc t | _ d St j d t | � | j � t d � � Wd QXd S)a� Mark the future as running or process any cancel notifications. Should only be used by Executor implementations and unit tests. If the future has been cancelled (cancel() was called and returned True) then any threads waiting on the future completing (though calls to as_completed() or wait()) are notified and False is returned. If the future was not cancelled then it is put in the running state (future calls to running() will return True) and True is returned. This method should be called by Executor implementations before executing the work associated with this future. If this method returns False then the work should not be executed. Returns: False if the Future was cancelled, True otherwise. Raises: RuntimeError: if this method was already called or if set_result() or set_exception() was called. FTz!Future %s in unexpected state: %szFuture in unexpected stateN) r4 r: r r r@ r" r r rW Zcriticalr2 � RuntimeError)r rC r r r � set_running_or_notify_cancel� s z#Future.set_running_or_notify_cancelc C s^ | j �E | | _ t | _ x | j D] } | j | � q& W| j j � Wd QX| j � d S)z�Sets the return value of work associated with the future. Should only be used by Executor implementations and unit tests. N)r4 rS r r: r@ r r] rY )r rb rC r r r � set_result� s zFuture.set_resultc C s^ | j �E | | _ t | _ x | j D] } | j | � q& W| j j � Wd QX| j � d S)z�Sets the result of the future as being the given exception. Should only be used by Executor implementations and unit tests. N)r4 rT r r: r@ r! r] rY )r rN rC r r r � set_exception� s zFuture.set_exception)r r r r r rY r\ r^ r r rQ ra r` rb rN rd re rf r r r r rR s " ( rR c @ s[ e Z d Z d Z d d � Z d d d d � Z d d d � Z d d � Z d d � Z d S)�ExecutorzCThis is an abstract base class for concrete asynchronous executors.c O s t � � d S)a Submits a callable to be executed with the given arguments. Schedules the callable to be executed as fn(*args, **kwargs) and returns a Future instance representing the execution of the callable. Returns: A Future representing the given call. N)�NotImplementedError)r r_ r8 �kwargsr r r �submit� s zExecutor.submitrJ Nc s` � d k r � t j � � n � � f d d � t | � D� � � � � f d d � } | � S)a~ Returns an iterator equivalent to map(fn, iter). Args: fn: A callable that will take as many arguments as there are passed iterables. timeout: The maximum number of seconds to wait. If None, then there is no limit on the wait time. Returns: An iterator equivalent to: map(func, *iterables) but the calls may be evaluated out-of-order. Raises: TimeoutError: If the entire result iterator could not be generated before the given timeout. Exception: If fn(*args) raises for any values. Nc s" g | ] } � j � | � � q Sr )rj )r; r8 )r_ r r r � <listcomp> s z Executor.map.<locals>.<listcomp>c 3 sj zG x@ � D]8 } � d k r* | j � Vq | j � t j � � Vq WWd x � D] } | j � qQ WXd S)N)rb rE r^ )r )rK rA rJ r r �result_iterator! s z%Executor.map.<locals>.result_iterator)rE �zip)r r_ rJ � iterablesrl r )rK r_ rA r rJ r �map s " z Executor.mapTc C s d S)a� Clean-up the resources associated with the Executor. It is safe to call this method several times. Otherwise, no other methods can be called after this one. Args: wait: If True then shutdown will not return until all running futures have finished executing and the resources used by the executor have been reclaimed. Nr )r rG r r r �shutdown- s zExecutor.shutdownc C s | S)Nr )r r r r r6 : s zExecutor.__enter__c C s | j d d � d S)NrG TF)rp )r �exc_typeZexc_valZexc_tbr r r r9 = s zExecutor.__exit__) r r r r rj ro rp r6 r9 r r r r rg � s % rg )#� __author__� collectionsZloggingr rE r r r r r r r r r Z_FUTURE_STATESr[ Z getLoggerrW rV r r r �objectr r# r) r* r/ rD rL � namedtuplerM rG rR rg r r r r �<module> sP : 1�
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