[vtkusers] Autorelease pool issue with vtkCocoaRenderWindowInteractor

Corrie Allen corrieallen at gmail.com
Sat Feb 23 14:11:09 EST 2008

Hi David & VTKers,
At the time my program runs, __OBJC_GC__ is undefined and I can't find  
anywhere in my project, the VTK build, or my environment setting where  
it is either defined  (or undefined).  So, if the definition isn't  
hiding away somewhere, my understanding of it is that the  
PoolOfLastResort "hack" should be setting up a pool that can be  
subsequently autoreleased during Cocoa operations.   I guess I need to  
now dig into the workings of CMake so as to understand what Sean is  
doing with his RogueResearch builds.  Any further suggestions (Like  
Hey Corrie, buy the Cmake book!) will certainly be appreciated.

On Feb 22, 2008, at 9:55 AM, David Cole wrote:

> Look at the code around line 222 of VTK/Rendering/ 
> vtkCocoaRenderWindowInteractor.mm
> If you are getting that message, then the vtkEarlyCocoaSetup  
> constructor is probably not being called. Maybe __OBJC_GC__ is  
> defined, but there is a need for an autorelease pool anyhow....?
> Some of the RogueResearch mac VTK dashboards use this cache entry...
> ...to turn on objective C++ garbage collection.
> Are you doing that in some fashion for your build? Or is __OBJC_GC__  
> defined for your build somehow?
> HTH,
> David
> On 2/21/08, Corrie Allen <corrieallen at gmail.com> wrote:
> Hi VTK gurus,
> I'm getting this snippet of output in my log window during the run  
> of a little program I've written.
> "
> Gonna initialize interactor next!
> And now starting interactor
> 2008-02-21 20:03:26.496 spawar2[1365:10b] ***  
> _NSAutoreleaseNoPool(): Object 0x13e22460 of class vtkCocoaServer  
> autoreleased with no pool in place - just leaking
> Stack: (0x90a3012f 0x9093cec2 0xda040 0xdaa3c 0x702b 0x6176)
> "
> The c++ code where this is occurring is
> ....
>    cout<<"Gonna initialize interactor next!"<<endl;
>   iren->Initialize();
>   cout<< "And now starting interactor"<< endl;
>   iren->Start(); //where iren is an instance of  
> vtkCocoaRenderWindowInteractor
> ....
> The 3-D object is rendered fine after the log note appears and the  
> interactor works well. The log output,though, is worrisome.  Where  
> can I begin to look for the cause of this: just leaking with no pool  
> in place seems bad.
> Corrie
> MacBook Pro, OSX 10.5.1, CMake 2.4.8, VTK 5.1,
> i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5465)
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