Function get_timebased_time

kernel/cellos/src/sys_time.cpp:152–197

}

u64 get_timebased_time() {
  if (u64 freq = utils::get_tsc_freq()) {
    const u64 tsc = rx::get_tsc();

#if _MSC_VER
    const u64 result =
        static_cast<u64>(u128_from_mul(tsc, g_timebase_freq) / freq) *
        g_cfg.core.clocks_scale / 100u;
#else
    const u64 result =
        (tsc / freq * g_timebase_freq + tsc % freq * g_timebase_freq / freq) *
        g_cfg.core.clocks_scale / 100u;
#endif
    return result - g_timebase_offs;
  }

  while (true) {
#ifdef _WIN32
    LARGE_INTEGER count;
    ensure(QueryPerformanceCounter(&count));

    const u64 time = count.QuadPart;
    const u64 freq = s_time_aux_info.perf_freq;

#if _MSC_VER
    const u64 result = static_cast<u64>(
        u128_from_mul(time * g_cfg.core.clocks_scale, g_timebase_freq) / freq /
        100u);
#else
    const u64 result =
        (time / freq * g_timebase_freq + time % freq * g_timebase_freq / freq) *
        g_cfg.core.clocks_scale / 100u;
#endif
#else
    struct timespec ts;
    ensure(::clock_gettime(CLOCK_MONOTONIC, &ts) == 0);

    const u64 result =
        (static_cast<u64>(ts.tv_sec) * g_timebase_freq +
         static_cast<u64>(ts.tv_nsec) * g_timebase_freq / 1000000000ull) *
        g_cfg.core.clocks_scale / 100u;
#endif
    if (result)
      return result - g_timebase_offs;
  }
}

// Add an offset to get_timebased_time to avoid leaking PC's uptime into the
// game As if PS3 starts at value 0 (base time) when the game boots If none-zero