On 28 Dec 2015, at 23:11, Mariano Martinez Peck <
[hidden email]> wrote:
On Mon, Dec 28, 2015 at 5:11 PM, Mariano Martinez Peck
<[hidden email]> 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?
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