Re: [Pharo-users] [FFI] Passing a null in argument

[Merwan Ouddane]

On 23/06/2016 18:39, Esteban Lorenzano wrote:

which function?

A function within a DLL file.

declared how?

Something like: void foo( void *bar)

used how?

MyClass foo: bar
    ^ self ffiCall: #(void foo( void *bar))

MyClass foo: 0
MyClass foo: FFIExternalObject null

Esteban

On 23 Jun 2016, at 18:07, Merwan Ouddane <merwanoudd...@gmail.com> wrote:

Hi,

I wanted to call a function using null as argument but did not managed to do so.

I tried to use an integer, but the FFI forbids it.

I tried to use FFIExternalObject null, but the FFI vould not coerce the 
arguments.

To make it work I had to duplicate the method and set 0 instead of an argument.

void foo (0);

Is it possible to do it the first way ?

Regards,

Merwan