Hi,

I've generated a set of CFFI bindings for FFTW (http://www.fftw.org). FFTW has its own versions of malloc and free (fftw_malloc, fftw_free). So for example, one would do (where fftw_complex is a specific FFTW type) -

fftw_complex *in;

in = (fftw_complex*) fftw_malloc(sizeof(fftw_complex) * N);

There is a rudimentary set of SBCL bindings for FFTW which binds the above in the following way -

(defun fftw-malloc-complex (size) (sb-alien:cast (fftw::|fftw_malloc| (* *sizeof-fftw-complex-in-bytes* size)) (* fftw::|fftw_complex|)))

My question is: how do I cast using CFFI?

Thanks, Chris

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