pub unsafe fn bsearch_arg( arg_key: *const c_void, arg_base: *const c_void, arg_nmemb: usize, arg_size: usize, arg_compar: Option<unsafe extern "C" fn(arg1: *const c_void, arg2: *const c_void, arg3: *mut c_void) -> c_int>, arg_arg: *mut c_void) -> *mut c_void