title: CLOCK_MONOTONIC and pthread_mutex_timedlock / pthread_cond_timedwait
body: <p>The <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_mutex_timedlock.html">pthread_mutex_timedlock documentation</a> says that <code>abs_timeout</code> takes a <code>CLOCK_REALTIME</code>. However, we all know that it is inappropriate for timing a specific duration (due to system time adjustments).</p>
  
  <p>Is there a way to make pthread lock timeout on <code>CLOCK_MONOTONIC</code> that is portable? The same goes with pthread_cond_timedwait.</p>