After additional digging I found were the leek appears to be. It
occurs in COMObject::__make_interface_pointer with the following
lines:
for iid in iids:
self._com_pointers_[iid] = pointer(pointer(vtbl))
I'm not sure why that the items in _com_pointers_ do not get free'd,
but as a work around I added the following to IUnknown_Release which
seems to resolve the issue (not much testing though).
if result == 0:
self.__unkeep__(self)
# new code to fix leek
self._com_pointers_ = {}
My guess is some part of creating the methods array in
__make_interface_pointer causes a reference to our class is a part of
the method deinition then added to the vtbl which is then added to
self._com_pointers_ creating a typical python memory leek...
-mike
On Mon, Oct 19, 2009 at 4:54 AM, Michael Eddington <medding...@gmail.com> wrote:
> Further investigation shows this also occurs when the com object is
> created with out being first registered (e.g. just creating an
> instance of the object in python). The following code reproduces this
> issue:
>
> import comtypes
> from comtypes.client import CreateObject
> import gc,time,threading
> import comtypes.server
> import comtypes.server.connectionpoints
> from comtypes import CoClass, GUID
>
> class TestComServer(CoClass):
> _reg_clsid_ = GUID('{BCCF36F6-4310-4953-B357-0B358BAE2DF1}')
> _reg_threading_ = "Both"
> _reg_progid_ = "TestComServer.Testing.1"
> _reg_novers_progid_ = "TestComServer.Testing"
> _reg_desc_ = "Memoryleak testing"
> _reg_clsctx_ = comtypes.CLSCTX_INPROC_SERVER
> _com_interfaces_ = [comtypes.typeinfo.IProvideClassInfo2,
> comtypes.errorinfo.ISupportErrorInfo,
> comtypes.connectionpoints.IConnectionPointContainer]
>
> while True:
> sink = TestComServer()
> sink.IUnknown_Release(sink)
> sink = None
> gc.collect()
>
> # end
>
>
> On Mon, Oct 19, 2009 at 2:54 AM, Michael Eddington <medding...@gmail.com>
> wrote:
>> Hello,
>>
>> I'm using the latest released comtypes version (0.6.1). I have a long
>> running python process that creates and releases a com object also
>> written in python. I noticed that this causes a memory leak. This
>> does not occur if I perform the same operations on a com object
>> written in C++.
>>
>> Below is code for the python com server (inproc) and also the test
>> app. To reproduce:
>>
>> 1. Open task manager
>> 2. python testcomsrver.py -regserver
>> 3. python testcom.py
>> 4. Notice process continues to grow in size...
>>
>> I'm using ActiveState Python v2.5.4 on 32bit Win7.
>>
>> -mike
>>
>> testcomsrver.py
>> ===========
>>
>> import comtypes
>> import comtypes.server
>> import comtypes.server.connectionpoints
>> from comtypes import CoClass, GUID
>>
>> class TestComServer(CoClass):
>> _reg_clsid_ = GUID('{BCCF36F6-4310-4953-B357-0B358BAE2DF1}')
>> _reg_threading_ = "Both"
>> _reg_progid_ = "TestComServer.Testing.1"
>> _reg_novers_progid_ = "TestComServer.Testing"
>> _reg_desc_ = "Memoryleak testing"
>> _reg_clsctx_ = comtypes.CLSCTX_INPROC_SERVER
>>
>> _com_interfaces_ = [comtypes.typeinfo.IProvideClassInfo2,
>>
>> comtypes.errorinfo.ISupportErrorInfo,
>>
>> comtypes.connectionpoints.IConnectionPointContainer]
>>
>> if __name__ == "__main__":
>> try:
>> from comtypes.server.register import UseCommandLine
>> UseCommandLine(TestComServer)
>> except Exception:
>> import traceback
>> traceback.print_exc()
>> raw_input()
>>
>> # end
>>
>>
>>
>> testcom.py
>> ========
>>
>> import comtypes
>> from comtypes.client import CreateObject
>> import gc
>>
>> while True:
>> obj = CreateObject("TestComServer.Testing")
>> obj.Release()
>> obj = None
>> gc.collect()
>>
>> # end
>>
>
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