Function libffi_sys::ffi_prep_java_raw_closure

pub unsafe extern "C" fn ffi_prep_java_raw_closure(
    arg1: *mut ffi_java_raw_closure, 
    cif: *mut ffi_cif, 
    fun: Option<unsafe extern "C" fn(arg1: *mut ffi_cif, arg2: *mut c_void, arg3: *mut ffi_java_raw, arg4: *mut c_void)>, 
    user_data: *mut c_void
) -> ffi_status