Re: [cffi-devel] Passing address of pointer

Am 26.08.2011 um 12:52 schrieb Luís Oliveira:

On Fri, Aug 26, 2011 at 10:08 AM, Frank Goenninger frgo@me.com wrote:

...

kr = (*privateDataRef->deviceInterface)->GetLocationID(privateDataRef->deviceInterface, &locationID);

Here I need to pass the address of a pointer to IOUSBDeviceInterface struct ...

Couldn't you call it like this?

IOUSBDeviceInterface *foo; GetLocationID(&foo, ...);

If you can, I'd try reducing your test case to allocate a pointer using WITH-FOREIGN-OBJECT and pass that to GetLocationID instead of using a struct.

Cheers,

And how would the CFFI equivalent to

GetLocationID(&foo, ...);

look like?

I still need the address of a variable that holds a pointer (and not the struct)...

(with-foreign-object (ptr :pointer) ...

?

Cheers Frank