On 28 Dec 2015, at 23:11, Mariano Martinez Peck <marianopeck@gmail.com> wrote:

On Mon, Dec 28, 2015 at 5:11 PM, Mariano Martinez Peck <marianopeck@gmail.com <mailto:marianopeck@gmail.com>> wrote: Hi Esteban,

Previously, I was doing with NB something like this:

pointer := NativeBoost allocate: 4. self primitiveWhatever: pointer

and:

primitiveWhatever: pointer <primitive: #primitiveNativeCall module: #NativeBoostPlugin error: errorCode > ^ self nbCall: #( int void (NBExternalAddress pointer ) )

But of course that doesn't work with latest FFI. So I tried instead:

pointer := ExternalAddress allocate: 4. primitiveWhatever: pointer <primitive: #primitiveNativeCall module: #NativeBoostPlugin error: errorCode > ^ self nbCall: #( int void (ExternalAddress pointer ) )

It looks like if I set "void*" rather than ExternalAddress it does work. Is this the expected path?

so.. ExternalAddress *should* map to void* by it self. If it does not, there is a bug (please report :P) but yes, using void* as argument should work out of the box so should not get the error below (none of my tests caused that either, so I do not understand why it can happen… I guess something in your code I do not completely understand). in general, I recommend to use the C type (void*) instead the pharo type (ExternalAddress)… the whole idea below NB was to provide an interfase where you can just copy and paste the C definition from a header file… even if that’s not the case all the time. Esteban

But then I get a ExternalAddress class #asExternalTypeOn: which is sent in FFICallout >> resolveType:

Any idea how can I use ExternalAddress in the signature of the FFI primitive call? What am I doing wrong?

Thanks in advance,

-- Mariano http://marianopeck.wordpress.com <http://marianopeck.wordpress.com/>

-- Mariano http://marianopeck.wordpress.com <http://marianopeck.wordpress.com/>