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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
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ry Yn d d l } | j � Yn Xd a t r� d a t � d S)a� Dummy implementation of _thread.start_new_thread().
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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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only thread. Thus a constant can be safely returned.
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d S)r a� Class implementing dummy implementation of _thread.LockType.
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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 sb | d k s | r d | _ d S| j s5 d | _ d S| d k rZ d d l } | j | � d Sd S)a� Dummy implementation of acquire().
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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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