AiaTimepointSeconds_t AiaClock_GetTimeSinceNTPEpoch()

in ports/Clock/src/aia_clock_config.c [59:84]

• 20 lines of code
• 3 McCabe index (conditional complexity)

AiaTimepointSeconds_t AiaClock_GetTimeSinceNTPEpoch()
{
    while( !Atomic_CompareAndSwap_u32( &g_spinLock, 1, 0 ) )
    {
        /* spin lock, inefficient */
    }
    if( !g_serverSynchronized )
    {
        /* RFC 868 */
        static const AiaTimepointSeconds_t UNIX_NTP_EPOCH_DELTA_SECONDS =
            2208988800;
        /* Initial retrieval of time from system. */
        /* Although not defined by the C standard, this is almost always an
         * integral value holding the number of seconds (not counting leap
         * seconds) since 00:00, Jan 1 1970 UTC, corresponding to POSIX time. */
        g_lastRetrievedTimeSinceNTPEpoch =
            time( NULL ) + UNIX_NTP_EPOCH_DELTA_SECONDS;
        g_lastSynchronization = AiaClock( GetTimeMs )() / AIA_MS_PER_SECOND;
    }
    AiaTimepointSeconds_t ret =
        g_lastRetrievedTimeSinceNTPEpoch +
        ( ( AiaClock( GetTimeMs )() / AIA_MS_PER_SECOND ) -
          g_lastSynchronization );
    AiaAtomicBool_Clear( &g_spinLock );
    return ret;
}