eaiovnaovbqoebvqoeavibavo B  f@sdZddlZddlZddlZddlmZddl m Z ddl m Z ddlmZmZyddlmZWn ek rddlmZYnXdd d d d d dddddddddddddddgZejZejZejZejZejZ y ej!Z"Wne#k rdZ"YnXej$Z$[da%da&ddZ'ddZ(eZ)ddZ!Gd d!d!Z*e*Z+Gd"d d Z,Gd#ddZ-Gd$dde-Z.Gd%ddZ/Gd&ddZ0Gd'dde1Z2ej3Z4e4d@d)d*Z5ea6iZ7iZ8e Z9ea:e;aGd-d.d.e=Z?Gd/d0d0e=Z@d1d ZAeAZBd2d ZCeCZDd3d4ZEd5d ZFdd6lmGZGe?aHd7d8ZId9d ZJydd:lmKZLWn"ek rzdd;lMmLZLYnXdrejPeNd?dS)Az;Thread module emulating a subset of Java's threading model.N) monotonic) format_exc)WeakSet)islicecount)deque get_ident active_count Conditioncurrent_thread enumerate main_thread TIMEOUT_MAXEventLockRLock SemaphoreBoundedSemaphoreThreadBarrierBrokenBarrierErrorTimer ThreadError setprofilesettracelocal stack_sizecCs|adS)zSet a profile function for all threads started from the threading module. The func will be passed to sys.setprofile() for each thread, before its run() method is called. N) _profile_hook)funcr./opt/alt/python37/lib64/python3.7/threading.pyr3scCs|adS)zSet a trace function for all threads started from the threading module. The func will be passed to sys.settrace() for each thread, before its run() method is called. N) _trace_hook)rrrr r=scOstdkrt||St||S)a2Factory function that returns a new reentrant lock. A reentrant lock must be released by the thread that acquired it. Once a 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. N)_CRLock_PyRLock)argskwargsrrr rKs  c@sVeZdZdZddZddZddd ZeZd d Zd d Z ddZ ddZ ddZ dS)_RLocka,This class implements reentrant lock objects. A reentrant lock must be released by the thread that acquired it. Once a 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. cCst|_d|_d|_dS)Nr)_allocate_lock_block_owner_count)selfrrr __init__bsz_RLock.__init__c Cs^|j}yt|j}Wntk r(YnXd|jr:dnd|jj|jj||j t t |fS)Nz)<%s %s.%s object owner=%r count=%d at %s>lockedZunlocked) r)_activenameKeyErrorr(r- __class__ __module__ __qualname__r*hexid)r+ownerrrr __repr__gsz_RLock.__repr__TcCsDt}|j|kr"|jd7_dS|j||}|r@||_d|_|S)aAcquire a lock, blocking or non-blocking. When invoked without arguments: if this thread already owns the lock, increment the recursion level by one, and return immediately. Otherwise, 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 as when called without arguments, and return true. When invoked with the blocking argument 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. When invoked with the floating-point timeout argument set to a positive 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 been acquired, false if the timeout has elapsed. )rr)r*r(acquire)r+blockingtimeoutmercrrr r:vs z_RLock.acquirecCs<|jtkrtd|jd|_}|s8d|_|jdS)amRelease a lock, decrementing the recursion level. 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There is no return value. zcannot release un-acquired lockr9N)r)r RuntimeErrorr*r(release)r+rrrr r@s  z_RLock.releasecCs |dS)N)r@)r+tvtbrrr __exit__sz_RLock.__exit__cCs|j|\|_|_dS)N)r(r:r*r))r+staterrr _acquire_restores z_RLock._acquire_restorecCs<|jdkrtd|j}d|_|j}d|_|j||fS)Nrzcannot release un-acquired lock)r*r?r)r(r@)r+rr6rrr _release_saves  z_RLock._release_savecCs |jtkS)N)r)r)r+rrr _is_ownedsz_RLock._is_ownedN)Tr8) __name__r2r3__doc__r,r7r: __enter__r@rDrFrGrHrrrr r&Xs $ r&c@steZdZdZdddZddZddZd d Zd d Zd dZ ddZ dddZ dddZ dddZ ddZeZdS)r ajClass that implements a condition variable. A condition variable allows one or more threads to wait until they are notified by another thread. If the lock argument is given and not None, it must be a Lock or RLock object, and it is used as the underlying lock. Otherwise, a new RLock object is created and used as the underlying lock. NcCs|dkrt}||_|j|_|j|_y |j|_Wntk rDYnXy |j|_Wntk rfYnXy |j|_Wntk rYnXt|_ dS)N) r_lockr:r@rGAttributeErrorrFrH_deque_waiters)r+lockrrr r,s$   zCondition.__init__cCs |jS)N)rLrK)r+rrr rKszCondition.__enter__cGs |jj|S)N)rLrD)r+r$rrr rDszCondition.__exit__cCsd|jt|jfS)Nz)rLlenrO)r+rrr r7szCondition.__repr__cCs|jdS)N)rLr@)r+rrr rGszCondition._release_savecCs|jdS)N)rLr:)r+xrrr rFszCondition._acquire_restorecCs"|jdr|jdSdSdS)NrFT)rLr:r@)r+rrr rHs  zCondition._is_ownedcCs|stdt}||j||}d}z:|dkrN|d}n |dkrd|d|}n |d}|S|||sy|j|Wnt k rYnXXdS)akWait 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. This method releases the underlying lock, and then blocks until it is 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. zcannot wait on un-acquired lockFNTr) rHr?r'r:rOappendrGrFremove ValueError)r+r<waiterZ saved_stateZgotitrrr waits*   zCondition.waitcCs\d}|}|}xH|sV|dk rD|dkr0t|}n|t}|dkrDP|||}qW|S)zWait until a condition evaluates to True. predicate should be a callable which result will be interpreted as a boolean value. A timeout may be provided giving the maximum time to wait. Nr)_timerW)r+Z predicater<endtimeZwaittimeresultrrr wait_for8s    zCondition.wait_forr9c Csj|std|j}tt||}|s,dSx8|D]0}|y||Wq2tk r`Yq2Xq2WdS)aKWake up one or more threads waiting on this condition, if any. If the calling thread has not acquired the lock when this method is called, a RuntimeError is raised. This method wakes up at most n of the threads waiting for the condition variable; it is a no-op if no threads are waiting. z!cannot notify on un-acquired lockN)rHr?rOrN_islicer@rTrU)r+nZ all_waitersZwaiters_to_notifyrVrrr notifyOs  zCondition.notifycCs|t|jdS)zWake up all threads waiting on this condition. If the calling thread has not acquired the lock when this method is called, a RuntimeError is raised. N)r^rQrO)r+rrr notify_allfszCondition.notify_all)N)N)N)r9)rIr2r3rJr,rKrDr7rGrFrHrWr[r^r_Z notifyAllrrrr r s   0   c@s8eZdZdZd ddZdddZeZd d Zd d ZdS)raGThis class implements semaphore objects. 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. r9cCs&|dkrtdtt|_||_dS)Nrz$semaphore initial value must be >= 0)rUr r_cond_value)r+valuerrr r,~s zSemaphore.__init__TNc Cs|s|dk rtdd}d}|jjxb|jdkrt|s6P|dk rf|dkrRt|}n|t}|dkrfP|j|q&W|jd8_d}WdQRX|S)aAcquire 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. When invoked with a timeout other than None, it will block for at 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 acquireFrr9T)rUr`rarXrW)r+r;r<r>rYrrr r:s$    zSemaphore.acquirec Cs.|j|jd7_|jWdQRXdS)zRelease a semaphore, incrementing the internal counter by one. When the counter is zero on entry and another thread is waiting for it to become larger than zero again, wake up that thread. r9N)r`rar^)r+rrr r@szSemaphore.releasecCs |dS)N)r@)r+rArBrCrrr rDszSemaphore.__exit__)r9)TN) rIr2r3rJr,r:rKr@rDrrrr rrs   - c@s"eZdZdZdddZddZdS) raImplements 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. r9cCst||||_dS)N)rr,_initial_value)r+rbrrr r,s zBoundedSemaphore.__init__c CsB|j2|j|jkrtd|jd7_|jWdQRXdS)a6Release a semaphore, incrementing the internal counter by one. When the counter is zero on entry and another thread is waiting for it to become larger than zero again, wake up that thread. If the number of releases exceeds the number of acquires, raise a ValueError. z!Semaphore released too many timesr9N)r`rarcrUr^)r+rrr r@s  zBoundedSemaphore.releaseN)r9)rIr2r3rJr,r@rrrr rs c@sFeZdZdZddZddZddZeZdd Zd d Z dd dZ d S)rzClass implementing event objects. Events manage a flag that can be set to true with the set() method and reset to false with the clear() method. The wait() method blocks until the flag is true. The flag is initially false. cCstt|_d|_dS)NF)r rr`_flag)r+rrr r,s zEvent.__init__cCs|jtdS)N)r`r,r)r+rrr _reset_internal_locksszEvent._reset_internal_lockscCs|jS)z5Return true if and only if the internal flag is true.)rd)r+rrr is_setsz Event.is_setc Cs&|jd|_|jWdQRXdS)zSet the internal flag to true. All threads waiting for it to become true are awakened. Threads that call wait() once the flag is true will not block at all. TN)r`rdr_)r+rrr setsz Event.setc Cs|j d|_WdQRXdS)zReset the internal flag to false. Subsequently, threads calling wait() will block until set() is called to set the internal flag to true again. FN)r`rd)r+rrr clear sz Event.clearNc Cs,|j|j}|s|j|}|SQRXdS)aHBlock until the internal flag is true. If the internal flag is true on entry, return immediately. Otherwise, block until another thread calls set() to set the flag to true, or until the optional timeout occurs. 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Nr9)rjr`_enterr*rk_release_wait_exit)r+r<indexrrr rWPs   z Barrier.waitcCs:x|jdkr|jqW|jdkr(t|jdks6tdS)N)r8r9r)rlr`rWrAssertionError)r+rrr rons   zBarrier._entercCs>y"|jr|d|_|jWn|YnXdS)Nr9)rirlr`r__break)r+rrr rpyszBarrier._releasecsBjfdd|s"tjdkr0tjdks>tdS)Ncs jdkS)Nr)rlr)r+rr zBarrier._wait..rr9)r`r[rurrlrt)r+r<r)r+r rqs  z Barrier._waitcCs(|jdkr$|jdkr$d|_|jdS)Nr)r8r9)r*rlr`r_)r+rrr rrs  z Barrier._exitc CsT|jD|jdkr6|jdkr$d|_q<|jdkrReturn the number of threads currently waiting at the barrier.r)rlr*)r+rrr n_waitings zBarrier.n_waitingcCs |jdkS)z0Return True if the barrier is in a broken state.rx)rl)r+rrr brokenszBarrier.broken)NN)N)rIr2r3rJr,rWrorprqrrryrzrupropertyrmr{r|rrrr r7s       c@s eZdZdS)rN)rIr2r3rrrr rs Thread-%dcCs |tS)N)_counter)templaterrr _newnamesrc@seZdZdZdZejZd6ddddZdd Z d d Z d d Z ddZ ddZ ddZddZddZddZddZd7ddZd8d d!Zed"d#Zejd$d#Zed%d&Zd'd(Zd)d*Zed+d,Zejd-d,Zd.d/Zd0d1Zd2d3Zd4d5ZdS)9raA class that represents a thread of control. 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This method will raise a RuntimeError if called more than once on the same thread object. zthread.__init__() not calledz threads can only be started onceNr) rr?rrf_active_limbo_lock_limbo_start_new_thread _bootstrap ExceptionrW)r+rrr startBs  z Thread.startcCs.z|jr|j|j|jWd|`|`|`XdS)aXMethod representing the thread's activity. You may override this method in a subclass. The standard run() method invokes the callable object passed to the object's constructor as the target argument, if any, with sequential and keyword arguments taken from the args and kwargs arguments, respectively. N)rrr)r+rrr run[s z Thread.runcCs2y |Wn |jr&tdkr&dSYnXdS)N)_bootstrap_innerrr)r+rrr rls  zThread._bootstrapcCs t|_dS)N)rr)r+rrr _set_identszThread._set_identc Cs8t|_|j|js4tt|jWdQRXdS)z Set a lock object which will be released by the interpreter when the underlying thread state (see pystate.h) gets deleted. 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