Current File : //usr/local/lib/python3.8/__pycache__/queue.cpython-38.pyc
U
na\, @ s d Z ddlZddlmZ ddlmZmZ ddlmZ zddl m
Z
W n e k
r\ dZ
Y nX ddd d
d d gZ zdd
l m
Z
W n$ e k
r G dd deZ
Y nX G dd deZG dd d ZG dd
d
eZG dd d eZG dd dZe
dkreZ
dS )z'A multi-producer, multi-consumer queue. N)deque)heappushheappop) monotonic) SimpleQueueEmptyFullQueue
PriorityQueue LifoQueuer )r c @ s e Zd ZdZdS )r z4Exception raised by Queue.get(block=0)/get_nowait().N__name__
__module__ __qualname____doc__ r r !/usr/local/lib/python3.8/queue.pyr s c @ s e Zd ZdZdS )r z4Exception raised by Queue.put(block=0)/put_nowait().Nr r r r r r s c @ s e Zd ZdZd!ddZdd Zdd Zd d
Zd d Zd
d Z d"ddZ
d#ddZ dd Z dd Z
dd Zdd Zd d Zd d ZdS )$r zjCreate a queue object with a given maximum size.
If maxsize is <= 0, the queue size is infinite.
r c C sN || _ | | t | _t| j| _t| j| _t| j| _d| _ d S Nr )
maxsize_init threadingLockmutex Condition not_emptynot_fullall_tasks_doneunfinished_tasksselfr r r r __init__! s
zQueue.__init__c C sH | j 8 | jd }|dkr4|dk r*td| j || _W 5 Q R X 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
ValueError
notify_all)r
unfinishedr r r task_done8 s
zQueue.task_donec C s( | j | jr| j qW 5 Q R X dS )a Blocks until all items in the Queue have been gotten and processed.
The count of unfinished tasks goes up whenever an item is added to the
queue. The count goes down whenever a consumer thread calls task_done()
to indicate the item was retrieved and all work on it is complete.
When the count of unfinished tasks drops to zero, join() unblocks.
N)r r waitr r r r joinN s z
Queue.joinc
C s& | j | W 5 Q R S Q R X dS )9Return the approximate size of the queue (not reliable!).Nr _qsizer' r r r qsize[ s z Queue.qsizec
C s( | j | W 5 Q R S Q R X dS )a Return True if the queue is empty, False otherwise (not reliable!).
This method is likely to be removed at some point. Use qsize() == 0
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.
To create code that needs to wait for all queued tasks to be
completed, the preferred technique is to use the join() method.
Nr* r' r r r empty` s z Queue.emptyc
C s< | j , d| j k o | kn W 5 Q R S Q R X 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 fulln s z
Queue.fullTNc C s | j | jdkr|s*| | jkrtnr|dkrN| | jkr| j q2nN|dk r`tdn<t | }| | jkr|t }|dkrt| j | qj| | | jd7 _| j
W 5 Q R X 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 itemblocktimeoutendtime remainingr r r puty s&
z Queue.putc
C s | j |s| stnf|dkr8| s| j q"nH|dk rJtdn6t | }| s|t }|dkrrt| j | qT| }| j |W 5 Q R S Q R X 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 r/ r0 ) r r+ r r& r" r1 _getr r3 )r r5 r6 r7 r8 r4 r r r get s$
z Queue.getc C s | j |ddS )zPut an item into the queue without blocking.
Only enqueue the item if a free slot is immediately available.
Otherwise raise the Full exception.
Fr5 r9 r r4 r r r
put_nowait s zQueue.put_nowaitc C s | j ddS zRemove and return an item from the queue without blocking.
Only get an item if one is immediately available. Otherwise
raise the Empty exception.
Fr= r< r' r r r
get_nowait s zQueue.get_nowaitc C s t | _d S N)r queuer r r r r s z Queue._initc C s
t | jS rD lenrE r' r r r r+ s z Queue._qsizec C s | j | d S rD rE appendr? r r r r2 s z
Queue._putc C s
| j S rD )rE popleftr' r r r r; s z
Queue._get)r )TN)TN)r
r r r r r% r( r, r- r. r9 r< r@ rC r r+ r2 r; r r r r r s
c @ s0 e Zd ZdZdd Zdd Zdd Zdd Zd
S ) r
zVariant of Queue that retrieves open entries in priority order (lowest first).
Entries are typically tuples of the form: (priority number, data).
c C s
g | _ d S rD rE r r r r r s zPriorityQueue._initc C s
t | jS rD rF r' r r r r+ s zPriorityQueue._qsizec C s t | j| d S rD )r rE r? r r r r2 s zPriorityQueue._putc C s
t | jS rD )r rE r' r r r r; s zPriorityQueue._getNr
r r r r r+ r2 r; r r r r r
s
c @ s0 e Zd ZdZdd Zdd Zdd Zdd Zd
S ) r zBVariant of Queue that retrieves most recently added entries first.c C s
g | _ d S rD rK r r r r r s zLifoQueue._initc C s
t | jS rD rF r' r r r r+ s zLifoQueue._qsizec C s | j | d S rD rH r? r r r r2 s zLifoQueue._putc C s
| j S rD )rE popr' r r r r; s zLifoQueue._getNrL r r r r r s
c @ sL e Zd ZdZdd ZdddZddd Zd
d Zd d
Zdd Z dd Z
dS )_PySimpleQueuezYSimple, unbounded FIFO queue.
This pure Python implementation is not reentrant.
c C s t | _td| _d S r )r _queuer Semaphore_countr' r r r r s z_PySimpleQueue.__init__TNc C s | j | | j dS )zPut 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)rO rI rQ release)r r4 r5 r6 r r r r9
s z_PySimpleQueue.putc C s4 |dk r|dk rt d| j||s*t| j S )r: Nr r/ )r" rQ acquirer rO rJ )r r5 r6 r r r r< s
z_PySimpleQueue.getc C s | j |ddS )zPut an item into the queue without blocking.
This is exactly equivalent to `put(item)` and is only provided
for compatibility with the Queue class.
Fr= r> r? r r r r@ ' s z_PySimpleQueue.put_nowaitc C s | j ddS rA rB r' r r r rC / s z_PySimpleQueue.get_nowaitc C s t | jdkS )zCReturn True if the queue is empty, False otherwise (not reliable!).r rG rO r' r r r r- 7 s z_PySimpleQueue.emptyc C s
t | jS )r) rT r' r r r r, ; s z_PySimpleQueue.qsize)TN)TN) r
r r r r r9 r< r@ rC r- r, r r r r rN s
rN )r r collectionsr heapqr r r1 r rO r ImportError__all__r Exceptionr r r
r rN r r r r <module> s*
BA
Mini Shell