def test_weakref_subclassing(self):
import _weakref, gc
class A(object):
pass
class Ref(_weakref.ref):
def __init__(self, ob, callback=None, **other):
self.__dict__.update(other)
def callable(ref):
b.a = 42
a = A()
b = A()
b.a = 1
w = Ref(a, callable, x=1, y=2)
assert w.x == 1
assert w.y == 2
assert a.__weakref__ is w
assert b.__weakref__ is None
w1 = _weakref.ref(a)
w2 = _weakref.ref(a, callable)
assert a.__weakref__ is w1
del a
gc.collect()
assert w1() is None
assert w() is None
assert w2() is None
assert b.a == 42
def weakref_data(data, destroy_cb = None):
if type(data) in (str, int, long, types.NoneType, types.FunctionType):
# Naive optimization for common immutable cases.
return data
elif type(data) == types.MethodType:
cb = WeakCallback(data)
if destroy_cb:
cb.weakref_destroyed_cb = destroy_cb
cb.ignore_caller_args = True
return cb
elif type(data) in (list, tuple):
d = []
for item in data:
d.append(weakref_data(item, destroy_cb))
if type(data) == tuple:
d = tuple(d)
return d
elif type(data) == dict:
d = {}
for key, val in data.items():
d[weakref_data(key)] = weakref_data(val, destroy_cb)
return d
else:
try:
if destroy_cb:
return _weakref.ref(data, destroy_cb)
return _weakref.ref(data)
except TypeError:
pass
return data
def test_weakref_equality(self):
import _weakref, gc
class A(object):
def __eq__(self, other):
return True
def __ne__(self, other):
return False
a1 = A()
a2 = A()
ref1 = _weakref.ref(a1)
ref2 = _weakref.ref(a2)
assert ref1 == ref2
assert not (ref1 != ref2)
assert not (ref1 == [])
assert ref1 != []
del a1
gc.collect()
assert not ref1 == ref2
assert ref1 != ref2
assert not (ref1 == [])
assert ref1 != []
del a2
gc.collect()
assert not ref1 == ref2
assert ref1 != ref2
assert not (ref1 == [])
assert ref1 != []
def setdefault(self, key, default):
try:
ref = self.data[key]
except KeyError:
def remove(o, data=self.data, key=key):
del data[key]
ref = ref(default, remove)
self.data[key] = ref
return default
else:
return ref()
def test_weakref_reusing(self):
import _weakref, gc
class A(object):
pass
a = A()
ref1 = _weakref.ref(a)
ref2 = _weakref.ref(a)
assert ref1 is ref2
class wref(_weakref.ref):
pass
wref1 = wref(a)
assert isinstance(wref1, wref)
def Startup(self, slimItem):
sm.RegisterNotify(self)
self.ball = _weakref.ref(sm.GetService('michelle').GetBall(slimItem.itemID))
self.slimItem = _weakref.ref(slimItem)
self.id = slimItem.itemID
self.itemID = slimItem.itemID
self.updatedamage = slimItem.categoryID != const.categoryAsteroid and slimItem.groupID != const.groupHarvestableCloud and slimItem.groupID != const.groupOrbitalTarget
self.AddUIObjects(slimItem, self.itemID)
iconPar = self.sr.iconPar
barAndImageCont = self.barAndImageCont
barAndImageCont.isDragObject = True
barAndImageCont.GetDragData = self.GetTargetDragData
barAndImageCont.OnMouseDown = self.OnTargetMouseDown
barAndImageCont.OnClick = self.OnTargetClick
barAndImageCont.GetMenu = self.GetTargetMenu
barAndImageCont.OnMouseEnter = self.OnTargetMouseEnter
barAndImageCont.OnMouseExit = self.OnTargetMouseExit
self.sr.activeTarget = uicls.ActiveTargetOnBracket(parent=iconPar, itemID=self.itemID)
self.slimForFlag = slimItem
self.SetStandingIcon()
self.sr.hilite = uiprimitives.Sprite(name='hiliteSprite', parent=iconPar, left=-3, top=-3, width=100, height=100, texturePath='res:/UI/Texture/classes/Target/targetUnderlay.png', color=(1.0, 1.0, 1.0, 0.05))
self.sr.activeTarget.RotateArrows()
labelClass = uicontrols.EveLabelSmall
labelContainer = uicontrols.ContainerAutoSize(parent=self, name='labelContainer', align=uiconst.TOTOP)
self.sr.label = labelClass(text=' ', parent=labelContainer, align=uiconst.TOTOP, state=uiconst.UI_DISABLED, maxLines=1)
self.sr.label2 = labelClass(text=' ', parent=labelContainer, align=uiconst.TOTOP, state=uiconst.UI_DISABLED, maxLines=1)
self.sr.shipLabel = labelClass(text=' ', parent=labelContainer, align=uiconst.TOTOP, state=uiconst.UI_DISABLED, maxLines=1)
self.sr.distanceLabel = labelClass(text=' ', parent=labelContainer, align=uiconst.TOTOP, state=uiconst.UI_DISABLED, maxLines=1)
self.SetTargetLabel()
self.sr.assignedPar = uiprimitives.Container(name='assignedPar', align=uiconst.TOTOP, parent=self, height=32)
self.sr.assigned = uiprimitives.Container(name='assigned', align=uiconst.CENTERTOP, parent=self.sr.assignedPar, height=32)
self.sr.updateTimer = base.AutoTimer(random.randint(750, 1000), self.UpdateData)
self.UpdateData()
selected = sm.GetService('state').GetExclState(state.selected)
self.Select(selected == slimItem.itemID)
hilited = sm.GetService('state').GetExclState(state.mouseOver)
self.Hilite(hilited == slimItem.itemID)
activeTargetID = sm.GetService('target').GetActiveTargetID()
self.ActiveTarget(activeTargetID == slimItem.itemID)
drones = sm.GetService('michelle').GetDrones()
for key in drones:
droneState = drones[key]
if droneState.targetID == self.id:
self.drones[droneState.droneID] = droneState.typeID
self.UpdateDrones()
for moduleInfo in sm.GetService('godma').GetStateManager().GetActiveModulesOnTargetID(slimItem.itemID):
if moduleInfo:
moduleID = moduleInfo.itemID
if moduleID and moduleID not in self.activeModules:
self.AddWeapon(moduleInfo)
self.activeModules[moduleID] = moduleInfo
def test_correct_weakrefcount_after_death(self):
import _weakref, gc
class A(object):
pass
a = A()
ref1 = _weakref.ref(a)
ref2 = _weakref.ref(a)
assert _weakref.getweakrefcount(a) == 1
del ref1
gc.collect()
assert _weakref.getweakrefcount(a) == 1
del ref2
gc.collect()
assert _weakref.getweakrefcount(a) == 0
def test_hashing(self):
import _weakref, gc
class A(object):
def __hash__(self):
return 42
a = A()
w = _weakref.ref(a)
assert hash(a) == hash(w)
del a
gc.collect()
assert hash(w) == 42
w = _weakref.ref(A())
gc.collect()
raises(TypeError, hash, w)
def test_callback_cannot_ressurect(self):
import _weakref, gc
class A(object):
pass
a = A()
alive = A()
alive.a = 1
def callback(ref2):
alive.a = ref1()
ref1 = _weakref.ref(a, callback)
ref2 = _weakref.ref(a, callback)
del a
gc.collect()
assert alive.a is None
def test_eq(self):
import _weakref
class A(object):
pass
a = A()
assert not(_weakref.ref(a) == a)
assert _weakref.ref(a) != a
class A(object):
def __eq__(self, other):
return True
a = A()
assert _weakref.ref(a) == a
def __init__(self, callback, *args, **kwargs):
super(WeakCallback, self).__init__(callback, *args, **kwargs)
if type(callback) == types.MethodType:
# For methods
self._instance = _weakref.ref(callback.im_self, self._weakref_destroyed)
self._callback = callback.im_func.func_name
else:
self._instance = None
# Don't weakref lambdas.
if not hasattr(callback, 'func_name') or callback.func_name != '<lambda>':
self._callback = _weakref.ref(callback, self._weakref_destroyed)
self._args = weakref_data(args, self._weakref_destroyed)
self._kwargs = weakref_data(kwargs, self._weakref_destroyed)
self._weakref_destroyed_user_cb = None
def test_callback(self):
import _weakref, gc
class A(object):
pass
a1 = A()
a2 = A()
def callback(ref):
a2.ref = ref()
ref1 = _weakref.ref(a1, callback)
ref2 = _weakref.ref(a1)
assert _weakref.getweakrefcount(a1) == 2
del a1
gc.collect()
assert ref1() is None
assert a2.ref is None
def test_callback_order(self):
import _weakref, gc
class A(object):
pass
a1 = A()
a2 = A()
def callback1(ref):
a2.x = 42
def callback2(ref):
a2.x = 43
ref1 = _weakref.ref(a1, callback1)
ref2 = _weakref.ref(a1, callback2)
del a1
gc.collect()
assert a2.x == 42
def discard_member(self,member,safemode=False):
if not self._remember:
if safemode:
return
else:
raise GroupError("This group does not remember its members")
self.__delete_member_by_ref(weakref.ref(member))
def _remove(item, selfref=ref(self)):
self = selfref()
if self is not None:
if self._iterating:
self._pending_removals.append(item)
else:
self.data.discard(item)
def __contains__(self, item):
try:
wr = ref(item)
except TypeError:
return False
return wr in self.data
def keys(self):
L = []
for ref in self.data.keys():
o = ref()
if o is not None:
L.append(o)
return L
def _get_cached_value(self, prop, child, otherkey = None):
if child:
child = _weakref.ref(child)
if (prop, child, otherkey) in self._values_cache:
#print "CACHE HIT", self, prop, child, otherkey
return self._values_cache[(prop, child, otherkey)]
def test_ne(self):
import _weakref
class X(object):
pass
ref1 = _weakref.ref(X())
assert ref1.__eq__(X()) is NotImplemented
assert ref1.__ne__(X()) is NotImplemented
def remove(wr, selfref=ref(self)):
self = selfref()
if self is not None:
try:
del self.data[wr.key]
except KeyError:
pass
def has_key(self, key):
try:
wr = ref(key)
except TypeError:
return 0
return wr in self.data
def remove(wr, selfref=ref(self)):
self = selfref()
if self is not None:
if self._iterating:
self._pending_removals.append(wr.key)
else:
del self.data[wr.key]
def remove(k, selfref=ref(self)):
self = selfref()
if self is not None:
if self._iterating:
self._pending_removals.append(k)
else:
del self.data[k]
def test_runner():
import _weakref
global called
called = 0
a = IronPythonTest.Events()
# wire up an event w/ a circular reference
# back to the object, ensure the event
# is delivered
def foo():
global called
called += 1
foo.abc = a
a.InstanceTest += foo
a.CallInstance()
self.assertEqual(called, 1)
ret_val = _weakref.ref(foo)
#self.assertTrue(hasattr(ret_val, "abc")) #BUG
keep_alive(foo)
# ensure as long as the objects are still alive the event
# handler remains alive
import gc
for i in xrange(10):
gc.collect()
a.CallInstance()
self.assertEqual(called, 2)
return ret_val
def copy(self):
new = WeakValueDictionary()
for key, ref in self.data.items():
o = ref()
if o is not None:
new[key] = o
return new
def update(self, dict):
d = self.data
L = []
for key, value in dict.items():
L.append((ref(key, self._remove), value))
for key, r in L:
d[key] = r
def __contains__(self, key):
try:
wr = ref(key)
except TypeError:
return 0
return wr in self.data
def items(self):
L = []
for key, ref in self.data.items():
o = ref()
if o is not None:
L.append((key, o))
return L
def test_method_weakrefable(self):
import _weakref, gc
class A(object):
def f(self):
return 42
a = A()
meth = A.f
w_unbound = _weakref.ref(meth)
assert w_unbound()(A()) == 42
meth = A().f
w_bound = _weakref.ref(meth)
assert w_bound()() == 42
del meth
gc.collect()
assert w_unbound() is None
assert w_bound() is None
def symmetric_difference_update(self, other):
if self._pending_removals:
self._commit_removals()
if self is other:
self.data.clear()
else:
self.data.symmetric_difference_update(ref(item) for item in other)
def get(self, key, default=None):
return self.data.get(ref(key), default)
def __contains__(self, key):
try:
wr = ref(key)
except TypeError:
return 0
return wr in self.data
def __eq__(self, other):
if not isinstance(other, self.__class__):
return NotImplemented
return self.data == set(ref(item) for item in other)
def __delitem__(self, key):
self._dirty_len = True
del self.data[ref(key)]
def __isub__(self, other):
if self is other:
self.data.clear()
else:
self.data.difference_update(ref(item) for item in other)
return self
def issubset(self, other):
return self.data.issubset(ref(item) for item in other)
def __iand__(self, other):
if self._pending_removals:
self._commit_removals()
self.data.intersection_update(ref(item) for item in other)
return self
def __init__(self, weakcontainer):
# Don't create cycles
self.weakcontainer = ref(weakcontainer)
def discard(self, item):
if self._pending_removals:
self._commit_removals()
self.data.discard(ref(item))
def remove(self, item):
if self._pending_removals:
self._commit_removals()
self.data.remove(ref(item))
def pop(self, key, *args):
self._dirty_len = True
return self.data.pop(ref(key), *args)
def add(self, item):
if self._pending_removals:
self._commit_removals()
self.data.add(ref(item, self._remove))
def __setattr__(self, name, val):
if callable(val):
ref = CallableWeakRef(val)
else:
ref = _weakref.ref(val)
self.__dict__[name] = ref
def setdefault(self, key, default=None):
return self.data.setdefault(ref(key, self._remove), default)
def __contains__(self, item):
return ref(item) in self.data
def __ge__(self, other):
return self.data >= set(ref(item) for item in other)
def __setitem__(self, key, value):
self.data[key] = ref(value, self.__makeremove(key))
def update(self, dict):
d = self.data
for key, value in dict.items():
d[ref(key, self._remove)] = value
def throw(self, type=None, value=None, tb=None, aborted=False):
"""
This method should be called when the owner (creator) of the InProgress is
finished because it raised an exception.
Any callbacks connected to the :attr:`~kaa.InProgress.exception` signal will
then be emitted with the arguments passed to this method.
The parameters correspond to sys.exc_info(). If they are not specified
then the current exception in sys.exc_info() will be used; this is
analogous to a naked ``raise`` within an ``except`` block.
:param type: the class of the exception
:param value: the instance of the exception
:param tb: the traceback object representing where the exception took place
"""
# This function must deal with a tricky problem. See:
# http://mail.python.org/pipermail/python-dev/2005-September/056091.html
#
# Ideally, we want to store the traceback object so we can defer the
# exception handling until some later time. The problem is that by
# storing the traceback, we create some ridiculously deep circular
# references.
#
# The way we deal with this is to pass along the traceback object to
# any handler that can handle the exception immediately, and then
# discard the traceback. A stringified formatted traceback is attached
# to the exception in the formatted_traceback attribute.
#
# The above URL suggests a possible non-trivial workaround: create a
# custom traceback object in C code that preserves the parts of the
# stack frames needed for printing tracebacks, but discarding objects
# that would create circular references. This might be a TODO.
if type is None:
type, value, tb = sys.exc_info()
if value is None:
raise ValueError(
'throw() with no parameters but there is no current exception'
)
self._exception = type, value, tb
self._unhandled_exception = True
stack = traceback.extract_tb(tb)
# Attach a stringified traceback to the exception object. Right now,
# this is the best we can do for asynchronous handlers.
trace = ''.join(traceback.format_exception(*self._exception)).strip()
value.formatted_traceback = trace
# Wake any threads waiting on us. We've initialized _exception with
# the traceback object, so any threads that access the result property
# between now and the end of this function will have an opportunity to
# get the live traceback.
self._finished_event_poke(set=True)
if self._exception_signal.count() == 0:
# There are no exception handlers, so we know we will end up
# queuing the traceback in the exception signal. Set it to None
# to prevent that.
tb = None
if self._exception_signal.emit_when_handled(type, value, tb) == False:
# A handler has acknowledged handling this exception by returning
# False. So we won't log it.
self._unhandled_exception = None
# If we were thrown an InProgressAborted, the likely reason is an InProgress
# we were waiting on has been aborted. In this case, we emit the abort
# signal and clear _unhandled_exception, provided we are abortable (which
# by default is true as long as there are any callbacks connected to the
# abort signal. Otherwise, do not clear _unhandled_exception so that it
# gets logged.
if isinstance(value, InProgressAborted) and self.abortable:
if not aborted:
self.signals['abort'].emit(value)
self._unhandled_exception = None
if self._unhandled_exception:
# This exception was not handled synchronously, so we set up a
# weakref object with a finalize callback to a function that
# logs the exception. We could do this in __del__, except that
# the gc refuses to collect objects with a destructor. The weakref
# kludge lets us accomplish the same thing without actually using
# __del__.
#
# If the exception is passed back via result property, then it is
# considered handled, and it will not be logged.
cb = Callable(InProgress._log_exception, trace, value, self._stack)
self._unhandled_exception = _weakref.ref(self, cb)
# Remove traceback from stored exception. If any waiting threads
# haven't gotten it by now, it's too late.
if not isinstance(value, AsyncExceptionBase):
value = AsyncException(value, stack)
if hasattr(value, 'with_traceback'):
# Remove traceback attached to exception objects in Python 3.
value = value.with_traceback(None)
self._exception = value.__class__, value, None
# cleanup
self.disconnect_all()
self._exception_signal.disconnect_all()
self.signals['abort'].disconnect_all()
# We return False here so that if we've received a thrown exception
# from another InProgress we're waiting on, we essentially inherit
# the exception from it and indicate to it that we'll handle it
# from here on. (Otherwise the linked InProgress would figure
# nobody handled it and would dump out an unhandled async exception.)
return False
def pop(self, key, *args):
return self.data.pop(ref(key), *args)
def __getitem__(self, key):
return self.data[ref(key)]
def remove(o, selfref=ref(self), key=key):
self = selfref()
if self is not None:
del self.data[key]
def __delitem__(self, key):
for ref in self.data.iterkeys():
o = ref()
if o == key:
del self.data[ref]
return
def __contains__(self, item):
try:
wr = ref(item)
except TypeError:
return False
return wr in self.data
def remove(k, selfref=ref(self)):
self = selfref()
if self is not None:
del self.data[k]
def has_key(self, key):
try:
wr = ref(key)
except TypeError:
return 0
return wr in self.data
def update(self, dict):
d = self.data
for key, o in dict.items():
d[key] = ref(o, self.__makeremove(key))
def __delitem__(self, key):
del self.data[ref(key)]
def difference_update(self, other):
if self is other:
self.data.clear()
else:
self.data.difference_update(ref(item) for item in other)
def __setitem__(self, key, value):
self.data[ref(key, self._remove)] = value
