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d a d d � Z d S)a/ Drop-in replacement for the thread module.
Meant to be used as a brain-dead substitute so that threaded code does
not need to be rewritten for when the thread module is not present.
Suggested usage is::
try:
import _thread
except ImportError:
import _dummy_thread as _thread
�error�start_new_thread�exit� get_ident�
allocate_lock�interrupt_main�LockType� � c C s� t | � t t � � k r* t d � � n t | � t t � � k rT t d � � n d a y | | | � Wn/ t k
r Yn d d l } | j � Yn Xd a t r� d a t � n d S)a� Dummy implementation of _thread.start_new_thread().
Compatibility is maintained by making sure that ``args`` is a
tuple and ``kwargs`` is a dictionary. If an exception is raised
and it is SystemExit (which can be done by _thread.exit()) it is
caught and nothing is done; all other exceptions are printed out
by using traceback.print_exc().
If the executed function calls interrupt_main the KeyboardInterrupt will be
raised when the function returns.
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Since this module should only be used when _threadmodule is not
available, it is safe to assume that the current process is the
only thread. Thus a constant can be safely returned.
� ���r r r r r r A s c C s t � S)z0Dummy implementation of _thread.allocate_lock().)r r r r r r J s Nc C s | d k r t d � � n d S)z-Dummy implementation of _thread.stack_size().Nz'setting thread stack size not supportedr
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stack_sizeN s r c C s t � S)z0Dummy implementation of _thread._set_sentinel().)r r r r r �
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� Z d S)r a� Class implementing dummy implementation of _thread.LockType.
Compatibility is maintained by maintaining self.locked_status
which is a boolean that stores the state of the lock. Pickling of
the lock, though, should not be done since if the _thread module is
then used with an unpickled ``lock()`` from here problems could
occur from this class not having atomic methods.
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locked_status)�selfr r r �__init__c s zLockType.__init__Nr c C se | d k s | r d | _ d S| j s5 d | _ d S| d k r] d d l } | j | � n d Sd S)a� Dummy implementation of acquire().
For blocking calls, self.locked_status is automatically set to
True and returned appropriately based on value of
``waitflag``. If it is non-blocking, then the value is
actually checked and not set if it is already acquired. This
is all done so that threading.Condition's assert statements
aren't triggered and throw a little fit.
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F)r �timeZsleep)r ZwaitflagZtimeoutr! r r r �acquiref s zLockType.acquirec C s | j � d S)N)�release)r �typ�val�tbr r r �__exit__� s zLockType.__exit__c C s | j s t � n d | _ d S)zRelease the dummy lock.FT)r r )r r r r r# � s zLockType.releasec C s | j S)N)r )r r r r �locked� s zLockType.lockedr )
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__module__� __qualname__�__doc__r r" � __enter__r' r# r( r r r r r X s FTc C s t r t � n d a d S)z^Set _interrupt flag to True to have start_new_thread raise
KeyboardInterrupt upon exiting.TN)r r r r r r r r � s l )r, �__all__� TIMEOUT_MAX� RuntimeErrorr r r r r r r �objectr r r r r r r r �<module>
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