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TN T"r% c t S )z6Get the trace function as set by threading.settrace().r3 r$ r% r& r r t s r% c : t t | i |S t | i |S )a2 Factory function that returns a new reentrant lock.
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c_ y| j j || }|r|| _ d| _ |S )a Acquire a lock, blocking or non-blocking.
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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
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}|dk r |S | j | | }|sB|S )zWait until a condition evaluates to True.
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variable; it is a no-op if no threads are waiting.
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blocks if necessary until it can return without making the counter
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}|dk rnB| j j | | j dk( rS| xj dz c_ d}ddd |S # 1 sw Y |S xY w)a Acquire a semaphore, decrementing the internal counter by one.
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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.
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an argument would block, return false immediately; otherwise, do the
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that interval, return false. Return true otherwise.
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+Z I !r% r c 2 e Zd ZdZd fd Zd ZddZ xZS )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
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raise a ValueError.
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FN)r r rE s r& r z Event.clears s ZZ DJ ZZs 'Nc | j 5 | j }|s| j j | }|cddd S # 1 sw Y yxY w)aH Block until the internal flag is true.
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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
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points. Threads block on 'wait()' and are simultaneously awoken once they
have all made that call.
Nc |dk r t d t t | _ || _ || _ || _ d| _ d| _ y)aW Create a barrier, initialised to 'parties' threads.
'action' is a callable which, when supplied, will be called by one of
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default for all subsequent 'wait()' calls.
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When the specified number of threads have started waiting, they are all
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Drop any shutdown locks that don't correspond to running threads anymore.
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set when Thread objects are not joined explicitly. See bpo-37788.
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Zd Zd Zd Zd dZd dZed Zej, d Zed Ze red Zd Zed Zej, d Zd Zd Z d Z d Z y)!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
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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
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