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dummy_thread.pyc
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2014-12-31
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# Source Generated with Decompyle++
# File: in.pyc (Python 2.7)
'''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
'''
__all__ = [
'error',
'start_new_thread',
'exit',
'get_ident',
'allocate_lock',
'interrupt_main',
'LockType']
import traceback as _traceback
class error(Exception):
'''Dummy implementation of thread.error.'''
def __init__(self, *args):
self.args = args
def start_new_thread(function, args, kwargs = { }):
'''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.
'''
global _main, _interrupt
if type(args) != type(tuple()):
raise TypeError('2nd arg must be a tuple')
if type(kwargs) != type(dict()):
raise TypeError('3rd arg must be a dict')
_main = False
try:
function(*args, **kwargs)
except SystemExit:
pass
except:
_traceback.print_exc()
_main = True
if _interrupt:
_interrupt = False
raise KeyboardInterrupt
def exit():
'''Dummy implementation of thread.exit().'''
raise SystemExit
def get_ident():
'''Dummy implementation of thread.get_ident().
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.
'''
return -1
def allocate_lock():
'''Dummy implementation of thread.allocate_lock().'''
return LockType()
def stack_size(size = None):
'''Dummy implementation of thread.stack_size().'''
if size is not None:
raise error('setting thread stack size not supported')
return 0
class LockType(object):
'''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.
'''
def __init__(self):
self.locked_status = False
def acquire(self, waitflag = None):
"""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.
"""
if waitflag is None or waitflag:
self.locked_status = True
return True
if not None.locked_status:
self.locked_status = True
return True
return None
__enter__ = acquire
def __exit__(self, typ, val, tb):
self.release()
def release(self):
'''Release the dummy lock.'''
if not self.locked_status:
raise error
self.locked_status = False
return True
def locked(self):
return self.locked_status
_interrupt = False
_main = True
def interrupt_main():
'''Set _interrupt flag to True to have start_new_thread raise
KeyboardInterrupt upon exiting.'''
global _interrupt
if _main:
raise KeyboardInterrupt
_interrupt = True