def freezify(cls, frameCount=1):
"""Returns a 'frozen' namedtuple type of the given SlotCompare subclass."""
assert issubclass(cls, SlotCompare)
frozenName = 'Frozen' + cls.__name__
# namedtuple constructs the base class.
baseType = namedtuple(frozenName, cls.__slots__)
# Subclass the namedtuple to add a thaw() mixin and to copy read-only
# versions of the thawed class' properties.
frozenDict = {'__slots__': (), '_thawedType': cls}
for name, value in inspect.getmembers(cls):
if isinstance(value, property):
frozenDict[name] = property(value.fget)
frozenType = type(frozenName, (baseType, _Thawable), frozenDict)
# Stash forward and backward type references.
cls._frozenType = frozenType
frozenType._thawedType = cls
# Frozen types are always safe to unpickle.
module = sys._getframe(frameCount).f_globals.get('__name__', '__main__')
frozenType.__module__ = module
chutney.register(frozenType, _force=True)
return frozenType
assigned = len(worker.tasks)
available = worker.slots.get(self.slotType, 2)
free = max(available - assigned, 0)
if free:
return core_const.A_NOW, free
else:
return core_const.A_LATER, None
## Freezer machinery
def getData(self):
return self.job.data.getObject()
def setData(self, obj):
if not isinstance(obj, rmk_types.FrozenObject):
obj = rmk_types.FrozenObject.fromObject(obj)
self.job.data = obj
TaskCallbacks = namedtuple('TaskCallbacks', 'deferred callbacks')
try:
BaseException
except NameError:
BaseException = Exception
class TasksFailed(BaseException):
pass
