Function libffi_sys::ffi_prep_closure_loc

pub unsafe extern "C" fn ffi_prep_closure_loc(
    arg1: *mut ffi_closure, 
    arg2: *mut ffi_cif, 
    fun: Option<unsafe extern "C" fn(arg1: *mut ffi_cif, arg2: *mut c_void, arg3: *mut *mut c_void, arg4: *mut c_void)>, 
    user_data: *mut c_void, 
    codeloc: *mut c_void
) -> ffi_status