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r r r r r r/ r r! r" r) r r )r' r r+ l s r+ c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) �_AcquireFutureszDA context manager that does an ordered acquire of Future conditions.c C s t |td�| _d S )N)�key)�sorted�id�futures)r r4 r r r r � s z_AcquireFutures.__init__c C s x| j D ]}|jj� qW d S )N)r4 �
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Iterate on the list *fs*, yielding finished futures one by one in
reverse order.
Before yielding a future, *waiter* is removed from its waiters
and the future is removed from each set in the collection of sets
*ref_collect*.
The aim of this function is to avoid keeping stale references after
the future is yielded and before the iterator resumes.
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j� W dQ R X |j� t||| |fd�E dH q~W W dx,| D ]$}|j� |jj|� W dQ R X �q W X dS )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.
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|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.
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C sR | j �: | jttgkrdS | jttgkr,dS t| _| j j� W dQ R X | j� dS )z�Cancel the future if possible.
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)r r r r rY y s z Future.donec C s | j r| j �n| jS d S )N)r\ r[ )r r r r Z __get_result~ s zFuture.__get_resultc C s> | j �& | jtttgkr(| jj|� dS W dQ R X || � dS )a% Attaches a callable that will be called when the future finishes.
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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
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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.
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Exception: If the call raised then that exception will be raised.
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C st | j �d | jttgkr t� �n| jtkr.| jS | j j|� | jttgkrPt� �n| jtkr`| jS t� �W dQ R X dS )aU Return the exception raised by the call that the future represents.
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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:
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| �| j� t d��W dQ R X dS )a� Mark the future as running or process any cancel notifications.
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If the future was not cancelled then it is put in the running state
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This method should be called by Executor implementations before
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or set_exception() was called.
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C sN | j �6 || _t| _x| jD ]}|j| � q W | j j� W dQ R X | j� dS )z�Sets the return value of work associated with the future.
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N)�NotImplementedError)r rf r9 �kwargsr r r �submit s zExecutor.submitNr. )rR � chunksizec sB �dk r�t j� � ��fdd�t|� D ��� ��fdd�}|� S )a} Returns an iterator equivalent to map(fn, iter).
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is no limit on the wait time.
chunksize: The size of the chunks the iterable will be broken into
before being passed to a child process. This argument is only
used by ProcessPoolExecutor; it is ignored by
ThreadPoolExecutor.
Returns:
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Exception: If fn(*args) raises for any values.
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executor have been reclaimed.
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