On Mon, Oct 23, 2017 at 8:13 PM, Ben Coman <btc@openinworld.com> wrote:

On Mon, Oct 23, 2017 at 11:46 PM, Jan Cada <jan@cada.cz> wrote:

Hi,

I would like to connect fingerprint reader to pharo - so far I am able to use C library to connect to it using UFFI,
however the problem is that I can wait for fingerprint indefinitely ( blocking call to library) or register call-back for moment when fingerprint is available.
The registration function returns immediately, so it is clear that the callback will be called from another thread.

Is such situation supported by UFFI ?

Thanks for any tip,

Jan

Callbacks are supported. Here is an example...

http://blog.openinworld.com/2016/09/pharo-libclang-ffi-part-4-ast-walking-with-visitors-callbacks/

@Todd, How did find working through this part?����

cheers -ben