fn randomSecure(userdata: ?*anyopaque, buffer: []u8) Io.RandomSecureError!void
fn randomSecure(userdata: ?*anyopaque, buffer: []u8) Io.RandomSecureError!void { const ev: *Evented = @ptrCast(@alignCast(userdata)); _ = ev; if (buffer.len > 0) c.arc4random_buf(buffer.ptr, buffer.len); }