Hi,
I have got a problem with the deinit function.
After implementing, running csound
executes with a segmentation fault.

Csound tidy up: Segmentation fault

The deinit function should free memory used to store the memory to
draw in a fltk widget. The memory is allocated at the init time with
the new operator. In the init function of the opcode I register the 
callback:

//Register the Deinit Callback
if(p->init!=1)
{
   csound->RegisterDeinitCallback(csound, p, fltimeampWindow_deinit);
   p->init=1;
}

And provide a callback function:

extern "C" int fltimeampWindow_deinit(CSOUND *csound, void *pp)
{
   FLTIMEAMPWINDOW *p = (FLTIMEAMPWINDOW *)pp;

   ADDR_SET_VALUE v = AddrSetValue[(int)*p->ihandle];
   timeamp_window *opgl = (timeamp_window *) v.WidgAddress;
     //delete the drawing buffer
   delete[ ] opgl->pbuffer;

   return OK; }
The ihandle is a unique identifier to the widget and works in the
other opcode functions quite well. I am a bit stucked here - tried to
figure out with gdb where the seg-fault actually happens. But I am
not an expert dealing with gdb but it seams to be related with fltk,
maybe the memory is allready deleted.

Program received signal EXC_BAD_ACCESS, Could not access memory.
[Switching to process 1244 thread 0x28f]
0x00764998 in timeamp_window::draw() ()
(gdb) where
#0  0x00764998 in timeamp_window::draw() ()
#1  0x00615620 in Fl_Gl_Window::flush() ()
#2  0x01341fec in Fl_X::flush() ()
#3  0x0130694c in Fl::flush() ()
#4  0x01306588 in Fl::wait(double) ()
#5  0x02010920 in fltkRun (userdata=0x1360014) at InOut/widgets.cpp:1727
#6  0x900246e8 in _pthread_body ()

Any help would be highly appreciated,
I can also post the full code if desired
Thanks,
   Simon


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