Re: Octave Memory Management

[Thomas D. Dean]

On 8/18/19 11:36 AM, Sebastian Schöps wrote:
> Thomas D. Dean-2 wrote
> > I have an .oct file that I want to open a device, return the pointer to
> > the device structure.
> >
> > ...
> >
> > Does octave keep the allocation of dev_ptr between function calls?
> >
> > Is it possible to use a static variable in the .cc file?  Would I have
> > to free it when the device is closed?
> >
> > I can post the full application if necessary.
> >
> > Tom Dean
>
> Maybe Carlo‘s old advice helps?
> https://octave.1599824.n4.nabble.com/Persistent-dara-across-oct-files-tp4689039.html
>
> Seb.

Carlo's answer is static variables.

That gets me mostly there.  I am opening a USB device.

A clear("all") most likely destroys the instance of the static variable.
A subsequent call to the function results in
   usb_claim_interface error -6

This most likely results in a memory leak of the size of a device structure.

Is there any way to implement a "call on clear" or
"call on function removal" function.  Sort of like a device callback
function?  Google is not much help.

Tom Dean