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aVd7 ZWdd8lmXZX eM aYd9 ZZd: Z[ dd;lm\Z] n# e$ r dd r eja e_? dS dS )@z;Thread module emulating a subset of Java's threading model. N) monotonic)WeakSet)islicecount)deque) get_ident active_count Conditioncurrent_thread enumerate main_thread TIMEOUT_MAXEventLockRLock SemaphoreBoundedSemaphoreThreadBarrierBrokenBarrierErrorTimer ThreadError
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| a dS )zSet a profile function for all threads started from the threading module.
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KKKr( c t S )z6Get the trace function as set by threading.settrace().r, r* r( r' r r R s r( c @ t t | i |S t | i |S )a2 Factory function that returns a new reentrant lock.
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thread has acquired a reentrant lock, the same thread may acquire it again
without blocking; the thread must release it once for each time it has
acquired it.
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has acquired it.
c H t | _ d | _ d| _ d S Nr )_allocate_lock_block_owner_countselfs r' __init__z_RLock.__init__q s! $&& r( c
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c_ dS | j || }|r|| _ d| _ |S )a Acquire a lock, blocking or non-blocking.
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if another thread owns the lock, block until the lock is unlocked. Once
the lock is unlocked (not owned by any thread), then grab ownership, set
the recursion level to one, and return. If more than one thread is
blocked waiting until the lock is unlocked, only one at a time will be
able to grab ownership of the lock. There is no return value in this
case.
When invoked with the blocking argument set to true, do the same thing
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call without an argument would block, return false immediately;
otherwise, do the same thing as when called without arguments, and
return true.
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value, block for at most the number of seconds specified by timeout
and as long as the lock cannot be acquired. Return true if the lock has
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)r r: r; r9 acquire)r= blockingtimeoutmercs r' rQ z_RLock.acquire sa 4 [[ ;" KK1 KK1
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the decrement the recursion level is still nonzero, the lock remains
locked and owned by the calling thread.
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unlocked.
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cannot release un-acquired lockrP N)r: r RuntimeErrorr; r9 release)r= r s r' rY z_RLock.release si ;)++ % % @AA A "kAo- e " DK K ! ! ! ! ! " "r( c . | d S NrY r= tvtbs r' __exit__z_RLock.__exit__ r( c V | j |\ | _ | _ d S r[ )r9 rQ r; r: )r= states r' _acquire_restorez_RLock._acquire_restore s( #( T[[[r( c | j dk rt d | j }d| _ | j }d | _ | j ||fS )Nr rW )r; rX r: r9 rY )r= r rJ s r'
_release_savez_RLock._release_save sX ;! @AA A u~ r( c 0 | j t k S r[ )r: r r< s r' _is_ownedz_RLock._is_owned s {ikk))r( c B | j t k rdS | j S r7 )r: r r; r< s r' _recursion_countz_RLock._recursion_count s ;)++ % %1{r( NTrN )__name__rF rG __doc__r> rK rM rQ __enter__rY ra re rg ri rk r* r( r' r5 r5 g s
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notified by another thread.
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is created and used as the underlying lock.
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r( c 8 | j d S r[ )rr rQ )r= xs r' re zCondition._acquire_restore r r( c p | j d r| j dS dS )NFT)rr rQ rY r< s r' ri zCondition._is_owned s: : e $ $ J 54r( c | st d t }| | j | | }d} || d}n2|dk r| d| }n| d }|| | |s, | j | S # t $ r Y S w xY wS # | | |s, | j | w # t $ r Y w w xY ww xY w)ak Wait until notified or until a timeout occurs.
If the calling thread has not acquired the lock when this method is
called, a RuntimeError is raised.
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awakened by a notify() or notify_all() call for the same condition
variable in another thread, or until the optional timeout occurs. Once
awakened or timed out, it re-acquires the lock and returns.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof).
When the underlying lock is an RLock, it is not released using its
release() method, since this may not actually unlock the lock when it
was acquired multiple times recursively. Instead, an internal interface
of the RLock class is used, which really unlocks it even when it has
been recursively acquired several times. Another internal interface is
then used to restore the recursion level when the lock is reacquired.
z cannot wait on un-acquired lockFNTr )
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}|dk rn!| | | }|O|S )zWait until a condition evaluates to True.
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Nr )_timer )r= predicaterS endtimewaittimeresults r' wait_forzCondition.wait_forW s !#? #gg 0GG & 0H 1}} IIh Y[[F !
r( rP c : | st d | j }|rj|dk rf|d } | |dz }n# t $ r Y nw xY w | | n# t
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z!cannot notify on un-acquired lockr rP N)ri rX ru rY r r )r= nwaitersr s r' notifyzCondition.notifyn s ~~ D BCC C- !a%% QZF
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blocks if necessary until it can return without making the counter
negative. If not given, value defaults to 1.
rP c ~ |dk rt d t t | _ || _ d S )Nr z$semaphore initial value must be >= 0)r r
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}|dk rn7| j | | j dk V| xj dz c_ d}ddd n # 1 swxY w Y |S )a Acquire a semaphore, decrementing the internal counter by one.
When invoked without arguments: if the internal counter is larger than
zero on entry, decrement it by one and return immediately. If it is zero
on entry, block, waiting until some other thread has called release() to
make it larger than zero. This is done with proper interlocking so that
if multiple acquire() calls are blocked, release() will wake exactly one
of them up. The implementation may pick one at random, so the order in
which blocked threads are awakened should not be relied on. There is no
return value in this case.
When invoked with blocking set to true, do the same thing as when called
without arguments, and return true.
When invoked with blocking set to false, do not block. If a call without
an argument would block, return false immediately; otherwise, do the
same thing as when called without arguments, and return true.
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most timeout seconds. If acquire does not complete successfully in
that interval, return false. Return true otherwise.
Nz.can't specify timeout for non-blocking acquireFr rP T)r r r r r )r= rR rS rU r s r' rQ zSemaphore.acquire s 0 OG / MNN N
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c_ t | D ]}| j ddd dS # 1 swxY w Y dS )zRelease a semaphore, incrementing the internal counter by one or more.
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rP n must be one or moreN)r r r ranger r= r is r' rY zSemaphore.release s
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+ + + +Z I $ $ $ $ r( r c ( e Zd ZdZddZd ZddZdS )r a Implements a bounded semaphore.
A bounded semaphore checks to make sure its current value doesn't exceed its
initial value. If it does, ValueError is raised. In most situations
semaphores are used to guard resources with limited capacity.
If the semaphore is released too many times it's a sign of a bug. If not
given, value defaults to 1.
Like regular semaphores, bounded semaphores manage a counter representing
the number of release() calls minus the number of acquire() calls, plus an
initial value. The acquire() method blocks if necessary until it can return
without making the counter negative. If not given, value defaults to 1.
rP c J t | | || _ d S r[ )r r> _initial_valuer s r' r> zBoundedSemaphore.__init__
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c_ t | D ]}| j ddd dS # 1 swxY w Y dS )a> Release a semaphore, incrementing the internal counter by one or more.
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to become larger than zero again, wake up that thread.
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raise a ValueError.
rP r z!Semaphore released too many timesN)r r r r r r r s r' rY zBoundedSemaphore.release s
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$ $ $ $ $ $r( r c D e Zd ZdZd Zd Zd Zd Zd Zd Z d Z
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c T t t | _ d| _ d S )NF)r
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r( c t | j }| j rdnd}d|j d|j dt | dd| d S ) Nsetunsetr r r r z: r )rE r rF rG rI )r= r statuss r' rK zEvent.__repr__6 sP n *1'R3>RRC$4RR"T((RRRRRRRr( c 8 | j d S r[ )r rM r< s r' rM zEvent._at_fork_reinit; s
""$$$$$r( c | j S )z5Return true if and only if the internal flag is true.)r r< s r' is_setz Event.is_set? s
zr( c l ddl }| dt d | S )zyReturn true if and only if the internal flag is true.
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C(Q 8 8 8{{}} r( c | j 5 d| _ | j ddd dS # 1 swxY w Y dS )zSet the internal flag to true.
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that call wait() once the flag is true will not block at all.
TN)r r r r< s r' r z Event.setN s Z $ $ DJ J ! ! # # # $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $s !6::c T | j 5 d| _ ddd dS # 1 swxY w Y dS )zReset the internal flag to false.
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set the internal flag to true again.
FN)r r r< s r' ry z Event.clearY sw Z DJ s !!Nc | j 5 | j }|s| j | }|cddd S # 1 swxY w Y dS )aH Block until the internal flag is true.
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block until another thread calls set() to set the flag to true, or until
the optional timeout occurs.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof).
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points. Threads block on 'wait()' and are simultaneously awoken once they
have all made that call.
Nc t t | _ || _ || _ || _ d| _ d| _ dS )aW Create a barrier, initialised to 'parties' threads.
'action' is a callable which, when supplied, will be called by one of
the threads after they have all entered the barrier and just prior to
releasing them all. If a 'timeout' is provided, it is used as the
default for all subsequent 'wait()' calls.
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r( c | j }| j r$d|j d|j dt | ddS d|j d|j dt | dd| j d| j d S ) Nr r r r z : broken>z
: waiters=r r )rE brokenrF rG rI n_waitingr r s r' rK zBarrier.__repr__ s n ; UTs~TT(8TTbhhTTTT T=CN = =S%5 = =2d88I = = N= =-1\= = = >r( c || j }| j 5 | | j }| xj dz
c_ |dz | j k r| n| | || xj dz c_ | cddd S # | xj dz c_ | w xY w# 1 swxY w Y dS )aN Wait for the barrier.
When the specified number of threads have started waiting, they are all
simultaneously awoken. If an 'action' was provided for the barrier, one
of the threads will have executed that callback prior to returning.
Returns an individual index number from 0 to 'parties-1'.
NrP )r r _enterr; r _release_wait_exit)r= rS indexs r' r z Barrier.wait s ?mG
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DK J ! ! # # # # # KKMMM s ;? Ac j fd| s t j dk rt d S )Nc j dk S r7 r r< s r' z Barrier._wait.. s DK1,< r( r )r r r r r r= rS s ` r' r z
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name_templates r' _newnamer + s 8:: %%r( c \ d t D } t | dS )a!
Drop any shutdown locks that don't correspond to running threads anymore.
Calling this from time to time avoids an ever-growing _shutdown_locks
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d Zd Zd Zd Zd"dZd#dZed Zej d Zed Ze r ed Zd Zed Zej d Zd Zd Z d Z d Z dS )$r a A class that represents a thread of control.
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to specify the activity: by passing a callable object to the constructor, or
by overriding the run() method in a subclass.
FNr* )daemonc
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*group* should be None; reserved for future extension when a ThreadGroup
class is implemented.
*target* is the callable object to be invoked by the run()
method. Defaults to None, meaning nothing is called.
*name* is the thread name. By default, a unique name is constructed of
the form "Thread-N" where N is a small decimal number.
*args* is a list or tuple of arguments for the target invocation. Defaults to ().
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invocation. Defaults to {}.
If a subclass overrides the constructor, it must make sure to invoke
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else to the thread.
Nz Thread-%dz ()FT)strr rm rs _target_name_args_kwargs _daemonicr r _ident_HAVE_THREAD_NATIVE_ID
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| = ddd n # 1 swxY w Y w xY w| j dS )a- Start the thread's activity.
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object's run() method to be invoked in a separate thread of control.
This method will raise a RuntimeError if called more than once on the
same thread object.
z thread.__init__() not calledz threads can only be started onceNr* )
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sB A A!$A!)A? ?B2 B% B2%B) )B2,B) -B2c f | j | j | j i | j | ` | `| `dS # | ` | `| `w xY w)aX Method representing the thread's activity.
You may override this method in a subclass. The standard run() method
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