Thanks, Thomas. Ill try kill-pointed... On 2/17/10, Thomas Paviot <tpav...@gmail.com> wrote: > 2010/2/18 Frank Conradie <fr...@qfin.net> > >> Hi guys, >> > > Hi Franck, > > >> >> After running into serious memory use issues with our geometric >> processing algorithm, I have done a simple experiment that seems to show >> that wrapper garbage collection does not work at all. Try the code >> below, and you should run out of memory in no time: >> >> >> import gc >> from OCC.gp import * >> from OCC.BRepPrimAPI import * >> from OCC.TopExp import * >> >> def TestMemory(): >> w = 0.1 >> fp1 = (0.,0.,0.) >> fp2 = (w,w,w) >> mkbox = BRepPrimAPI_MakeBox(gp_Pnt(fp1[0],fp1[1],fp1[2]), >> gp_Pnt(fp2[0],fp2[1],fp2[2])) >> s1 = mkbox.Shell() >> e = TopExp_Explorer() >> for i in range(1000000): >> print i >> e.Init(s1, TopAbs_FACE) >> while e.More(): >> sh = e.Current() >> e.Next() >> if not (i % 1000): >> print 'Collecting garbage...' >> gc.collect() >> while 1: >> pass >> >> >> Not sure if this is a known issue or not, > > > It's known to be an issue, see: > * http://www.opencascade.org/org/forum/thread_17702/ > * the changelog of the 0.4 release > > >> but it certainly makes the >> wrapper problematic for our current purposes. If you can point me at the >> right place in the wrapper generator I can maybe try and help. >> > > The standard python gc module can not be used with pythonOCC: it's perfectly > suitable to manage python objects deletion, but fails to properly handle the > C++ pointed objects. A GarbageCollector class is available from any > pythonOCC module you're using. For instance: > > Python 2.6.1 (r261:67515, Jul 7 2009, 23:51:51) > [GCC 4.2.1 (Apple Inc. build 5646)] on darwin > Type "help", "copyright", "credits" or "license" for more information. >>>> from OCC.Standard import * >>>> GarbageCollector > <module 'OCC.GarbageCollector' from > '/Library/Python/2.6/site-packages/OCC/GarbageCollector.pyc'> >>>> dir(GarbageCollector) > ['GarbageCollector', '__builtins__', '__doc__', '__file__', '__name__', > '__package__', 'garbage', 'sys'] >>>> GarbageCollector.garbage > <OCC.GarbageCollector.GarbageCollector object at 0x100593e10> >>>> dir(GarbageCollector.garbage) > ['__class__', '__delattr__', '__dict__', '__doc__', '__format__', > '__getattribute__', '__hash__', '__init__', '__module__', '__new__', > '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', > '__str__', '__subclasshook__', '__weakref__', '_collected_objects', > 'collect_object', 'get_collected', 'purge'] > > The source code of this module is here: > http://svn.gna.org/viewcvs/pythonocc/trunk/src/wrapper/GarbageCollector.py?rev=706&view=markup > > In a few words, if you want to completely free memory: > GarbageCollector.garbage.purge() > > If you want to free one specific object, use the _kill_pointed() method of > that object (Nulify, Clear, Destroy won't work). > > I'll take time to write a more detailed message tomorrow about that topic. > > >> Thanks, >> Frank Conradie >> Qfinsoft >> > > All the best, > > Thomas >
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