Hi Merwan,

I tested this on Pharo 6 and it is working in Windows. However, in 32 bits Window doubles have an 8 byte alignment, unlike Linux where they have a 4 byte alignment.

Can you try doing the following before performing the ffi call in Windows, if you are moving an image from Linux or OS X:

Vec3 rebuildFieldAccessors.
Position rebuildFieldAccessors.

Best regards,

Ronie

2016-07-05 11:11 GMT+02:00 Merwan Ouddane <merwanouddane@gmail.com>:

Hi,

I have an issue whith nested structures.

I made some "dummy" structures in c:

typedef struct vec3 {
�������� double data[3];
} vec3;

typedef struct position {
�������� int i;
�������� vec3 vec;
} position;

And a "dummy" function to fill it:
void fillStruct(position *position)
{
������ position -> i = 19;
������ (position -> vec).data[0] = 1;
������ (position -> vec).data[1] = 2;
������ (position -> vec).data[2] = 3;
}

But I can't make the nested structure work.
The "i" is correctly set to 19 but I have values that doesn't make any sense in the vec3 structure.

In Pharo

I declared the Double3 type for the array inside Vec3:
Double3 := FFITypeArray ofType: 'double' size: 3

Vec3>>fieldsDesc
������ ^ #(
������ Double3 v;
)

And the position:
Position>>fieldsDesc
������ ^ #(
������ int i;
������ Vec3 vec;
)

The ffi call:
^ self ffiCall: #(void fillStruct(Position *position)) module: 'Test.dll'

Sorry for the long / messy mail :p

Any clues ?

Cheers,

Merwan