fn now(userdata: ?*anyopaque, clock: Io.Clock) Io.Timestamp
fn now(userdata: ?*anyopaque, clock: Io.Clock) Io.Timestamp { const t: *Threaded = @ptrCast(@alignCast(userdata)); _ = t; return switch (native_os) { .windows => nowWindows(clock), .wasi => nowWasi(clock), else => nowPosix(clock), }; }