fn nowPosix(clock: Io.Clock) Io.Timestamp
fn nowPosix(clock: Io.Clock) Io.Timestamp { const clock_id: posix.clockid_t = clockToPosix(clock); var timespec: posix.timespec = undefined; switch (posix.errno(posix.system.clock_gettime(clock_id, ×pec))) { .SUCCESS => return timestampFromPosix(×pec), else => return .zero, } }