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d� d�ZG dd� de�ZG dd� de�ZG dd� d�Ze du r~eZ dS dS )z'A multi-producer, multi-consumer queue.� N)�deque)�heappush�heappop)� monotonic)� SimpleQueue)�Empty�Full�Queue�
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dd� Zdd � Zd d � Zd d � Zeej�ZdS )#r zjCreate a queue object with a given maximum size.
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zQueue.__init__c C s^ | j �" | jd }|dkr|dk rtd��| j �� || _W d � dS 1 s(w Y dS )a. Indicate that a formerly enqueued task is complete.
Used by Queue consumer threads. For each get() used to fetch a task,
a subsequent call to task_done() tells the queue that the processing
on the task is complete.
If a join() is currently blocking, it will resume when all items
have been processed (meaning that a task_done() call was received
for every item that had been put() into the queue).
Raises a ValueError if called more times than there were items
placed in the queue.
� r z!task_done() called too many timesN)r r �
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"�zQueue.task_donec C sR | j � | jr| j �� | jsW d � dS W d � dS 1 s"w Y dS )a� Blocks until all items in the Queue have been gotten and processed.
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queue. The count goes down whenever a consumer thread calls task_done()
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N)r r �wait�r! r r r �joinO s
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Queue.joinc C s2 | j � | �� W d � S 1 sw Y dS )�9Return the approximate size of the queue (not reliable!).N�r �_qsizer) r r r �qsize\ s $�z Queue.qsizec C s4 | j �
| �� W d � S 1 sw Y dS )a� Return True if the queue is empty, False otherwise (not reliable!).
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as a direct substitute, but be aware that either approach risks a race
condition where a queue can grow before the result of empty() or
qsize() can be used.
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completed, the preferred technique is to use the join() method.
Nr, r) r r r �emptya s $�z Queue.emptyc C sH | j � d| j k o| �� kn W d � S 1 s w Y dS )aO Return True if the queue is full, False otherwise (not reliable!).
This method is likely to be removed at some point. Use qsize() >= n
as a direct substitute, but be aware that either approach risks a race
condition where a queue can shrink before the result of full() or
qsize() can be used.
r N)r r r- r) r r r �fullo s $�z
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� W d � dS 1 suw Y dS )a Put an item into the queue.
If optional args 'block' is true and 'timeout' is None (the default),
block if necessary until a free slot is available. If 'timeout' is
a non-negative number, it blocks at most 'timeout' seconds and raises
the Full exception if no free slot was available within that time.
Otherwise ('block' is false), put an item on the queue if a free slot
is immediately available, else raise the Full exception ('timeout'
is ignored in that case).
r N�''timeout' must be a non-negative number� r# ) r r r- r r( r$ �time�_putr r �notify)r! �item�block�timeout�endtime� remainingr r r �putz s0
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| �� s t�n8|du r | �� s | j �� | �� rn&|dk r'td��t� | }| �� sE|t� }|dkr;t�| j �|� | �� r0| �� }| j�� |W d � S 1 sZw Y dS )� Remove and return an item from the queue.
If optional args 'block' is true and 'timeout' is None (the default),
block if necessary until an item is available. If 'timeout' is
a non-negative number, it blocks at most 'timeout' seconds and raises
the Empty exception if no item was available within that time.
Otherwise ('block' is false), return an item if one is immediately
available, else raise the Empty exception ('timeout' is ignored
in that case).
Nr r1 r2 ) r r- r r( r$ r3 �_getr r5 )r! r7 r8 r9 r: r6 r r r �get� s. �
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$�z Queue.getc C � | j |dd�S )z�Put an item into the queue without blocking.
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put_nowait� � zQueue.put_nowaitc C � | j dd�S �z�Remove and return an item from the queue without blocking.
Only get an item if one is immediately available. Otherwise
raise the Empty exception.
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get_nowait� � zQueue.get_nowaitc C s t � | _d S �N)r �queuer r r r r � s z Queue._initc C �
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Queue._get)r �TN)r r r r r" r' r* r. r/ r0 r; r> rC rH r r- r4 r= � classmethod�types� GenericAlias�__class_getitem__r r r r r s"
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z�Variant of Queue that retrieves open entries in priority order (lowest first).
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c @ r[ ) r zBVariant of Queue that retrieves most recently added entries first.c C r\ rJ r] r r r r r � rO zLifoQueue._initc C rL rJ rM r) r r r r- � rO zLifoQueue._qsizec C rP rJ rQ rB r r r r4 � rS zLifoQueue._putc C rT rJ )rK �popr) r r r r= � rO zLifoQueue._getNr^ r r r r r � s r c @ sV e Zd ZdZdd� Zddd�Zddd �Zd
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�ZdS )�_PySimpleQueuezYSimple, unbounded FIFO queue.
This pure Python implementation is not reentrant.
c C s t � | _t�d�| _d S r )r �_queuer � Semaphore�_countr) r r r r" s z_PySimpleQueue.__init__TNc C s | j �|� | j�� dS )z�Put the item on the queue.
The optional 'block' and 'timeout' arguments are ignored, as this method
never blocks. They are provided for compatibility with the Queue class.
N)ra rR rc �release)r! r6 r7 r8 r r r r; s z_PySimpleQueue.putc C s4 |dur |dk r t d��| j�||�st�| j�� S )r< Nr r1 )r$ rc �acquirer ra rU )r! r7 r8 r r r r> s
z_PySimpleQueue.getc C r? )z�Put an item into the queue without blocking.
This is exactly equivalent to `put(item, block=False)` and is only provided
for compatibility with the Queue class.
Fr@ rA rB r r r rC * rD z_PySimpleQueue.put_nowaitc C rE rF rG r) r r r rH 2 rI z_PySimpleQueue.get_nowaitc C s t | j�dkS )zCReturn True if the queue is empty, False otherwise (not reliable!).r �rN ra r) r r r r/ : s z_PySimpleQueue.emptyc C rL )r+ rf r) r r r r. > s
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