Function fftw_sys::fftw_plan_dft

pub unsafe extern "C" fn fftw_plan_dft(
    rank: c_int, 
    n: *const c_int, 
    in_: *mut fftw_complex, 
    out: *mut fftw_complex, 
    sign: c_int, 
    flags: c_uint
) -> fftw_plan