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prevent garbage leak

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This commit is contained in:
Darren Ranalli 2006-12-30 00:22:49 +00:00
parent 93a5850c7b
commit a86451ad35
1 changed files with 88 additions and 39 deletions
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127
direct/src/showbase/EnforcesCalldowns.py
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@ -62,41 +62,47 @@ class EnforcesCalldowns:
if EnforcesCalldowns.notActive():
return
# this map tracks how many times each func has been called
self._funcId2calls = {}
# this map tracks the 'latch' values for each func; if the call count
# for a func is greater than the latch, then the func has been called.
self._funcId2latch = {}
# protect against multiple calldowns via multiple inheritance
if hasattr(self, '_numInits'):
self._numInits += 1
else:
self._numInits = 1
if self.__class__ not in EnforcesCalldowns._class2funcName2funcIds:
# prepare stubs to enforce method call-downs
EnforcesCalldowns._class2funcName2funcIds.setdefault(self.__class__, {})
# look through all of our base classes and find matches
classes = ClassTree(self).getAllClasses()
# collect IDs of all the enforced methods
funcId2func = {}
for cls in classes:
for name, item in cls.__dict__.items():
if id(item) in EnforcesCalldowns._decoId2funcId:
funcId = EnforcesCalldowns._decoId2funcId[id(item)]
funcId2func[funcId] = item
EnforcesCalldowns._funcId2class[funcId] = cls
# add these funcs to the list for our class
# this map tracks how many times each func has been called
self._funcId2calls = {}
# this map tracks the 'latch' values for each func; if the call count
# for a func is greater than the latch, then the func has been called.
self._funcId2latch = {}
if self.__class__ not in EnforcesCalldowns._class2funcName2funcIds:
# prepare stubs to enforce method call-downs
EnforcesCalldowns._class2funcName2funcIds.setdefault(self.__class__, {})
# look through all of our base classes and find matches
classes = ClassTree(self).getAllClasses()
# collect IDs of all the enforced methods
funcId2func = {}
for cls in classes:
for name, item in cls.__dict__.items():
if id(item) in EnforcesCalldowns._decoId2funcId:
funcId = EnforcesCalldowns._decoId2funcId[id(item)]
funcId2func[funcId] = item
EnforcesCalldowns._funcId2class[funcId] = cls
# add these funcs to the list for our class
funcName2funcIds = EnforcesCalldowns._class2funcName2funcIds[self.__class__]
for funcId, func in funcId2func.items():
funcName2funcIds.setdefault(func.__name__, [])
funcName2funcIds[func.__name__].append(funcId)
# now run through all the enforced funcs for this class and insert
# stub methods to do the enforcement
funcName2funcIds = EnforcesCalldowns._class2funcName2funcIds[self.__class__]
for funcId, func in funcId2func.items():
funcName2funcIds.setdefault(func.__name__, [])
funcName2funcIds[func.__name__].append(funcId)
# now run through all the enforced funcs for this class and insert
# stub methods to do the enforcement
funcName2funcIds = EnforcesCalldowns._class2funcName2funcIds[self.__class__]
self._obscuredMethodNames = set()
for name in funcName2funcIds:
oldMethod = getattr(self, name)
self._obscuredMethodNames.add(name)
setattr(self, name, new.instancemethod(
Functor(EnforcesCalldowns._enforceCalldowns, oldMethod, name),
self, self.__class__))
self._obscuredMethodNames = set()
for name in funcName2funcIds:
oldMethod = getattr(self, name)
self._obscuredMethodNames.add(name)
setattr(self, name, new.instancemethod(
Functor(EnforcesCalldowns._enforceCalldowns, oldMethod, name),
self, self.__class__))
def EC_destroy(self):
"""this used to be called destroy() but it was masking destroy() functions
@ -105,12 +111,21 @@ class EnforcesCalldowns:
if EnforcesCalldowns.notActive():
return
# this must be called on destruction to prevent memory leaks
for name in self._obscuredMethodNames:
delattr(self, name)
del self._obscuredMethodNames
# this opens up more cans of worms. Let's keep it closed for the moment
#del self._funcId2calls
#del self._funcId2latch
# protect against multiple calldowns via multiple inheritance
assert hasattr(self, '_numInits'), (
'too many calls to EnforcesCalldowns.EC_destroy, class=%s' % self.__class__.__name__)
if self._numInits == 1:
for name in self._obscuredMethodNames:
# Functors need to be destroyed to prevent garbage leaks
getattr(self, name).destroy()
delattr(self, name)
del self._obscuredMethodNames
# this opens up more cans of worms. Let's keep it closed for the moment
#del self._funcId2calls
#del self._funcId2latch
del self._numInits
else:
self._numInits -= 1
def skipCalldown(self, method):
if EnforcesCalldowns.notActive():
@ -164,15 +179,35 @@ if not EnforcesCalldowns.notActive():
class CalldownEnforceTestSubclass(CalldownEnforceTest):
def testFunc(self):
CalldownEnforceTest.testFunc(self)
def destroy(self):
CalldownEnforceTest.EC_destroy(self)
class CalldownEnforceTestSubclassFail(CalldownEnforceTest):
def testFunc(self):
pass
class CalldownEnforceTestSubclassSkip(CalldownEnforceTest):
def testFunc(self):
self.skipCalldown(CalldownEnforceTest.testFunc)
class CalldownEnforceTestSubclass2(CalldownEnforceTest):
def testFunc(self):
CalldownEnforceTest.testFunc(self)
def destroy(self):
CalldownEnforceTest.EC_destroy(self)
class CalldownEnforceTestDiamond(CalldownEnforceTestSubclass,
CalldownEnforceTestSubclass2):
def __init__(self):
CalldownEnforceTestSubclass.__init__(self)
CalldownEnforceTestSubclass2.__init__(self)
def testFunc(self):
CalldownEnforceTestSubclass.testFunc(self)
CalldownEnforceTestSubclass2.testFunc(self)
def destroy(self):
CalldownEnforceTestSubclass.destroy(self)
CalldownEnforceTestSubclass2.destroy(self)
cets = CalldownEnforceTestSubclass()
cetsf = CalldownEnforceTestSubclassFail()
cetss = CalldownEnforceTestSubclassSkip()
cetd = CalldownEnforceTestDiamond()
raised = False
try:
cets.testFunc()
@ -194,12 +229,26 @@ if not EnforcesCalldowns.notActive():
raised = True
if raised:
raise "calldownEnforced.skipCalldown raised when it shouldn't"
raised = False
cetd.testFunc()
msg = ''
try:
# make sure we're OK to call down to destroy multiple times
cetd.destroy()
except Exception, e:
msg = str(e)
raised = True
if raised:
raise "calldownEnforcedDiamond.destroy raised when it shouldn't\n%s" % msg
cetss.EC_destroy()
cetsf.EC_destroy()
cets.EC_destroy()
del cetd
del cetss
del cetsf
del cets
del CalldownEnforceTestDiamond
del CalldownEnforceTestSubclass2
del CalldownEnforceTestSubclassSkip
del CalldownEnforceTestSubclassFail
del CalldownEnforceTestSubclass