if (th->th_unique == NULL) return TD_NOTALLOC;
td_thr_set_event (th, event)     const td_thrhandle_t *th;     td_thr_events_t *event;{  td_thr_events_t old_event;  int i;  LOG ("td_thr_set_event");  /* Write the new value into the thread data structure.  */  if (ps_pdread (th->th_ta_p->ph,		 ((char *) th->th_unique		  + offsetof (struct _pthread_descr_struct,			      p_eventbuf.eventmask)),		 &old_event, sizeof (td_thrhandle_t)) != PS_OK)    return TD_ERR;	/* XXX Other error value?  */  /* Or the new bits in.  */  for (i = 0; i < TD_EVENTSIZE; ++i)    old_event.event_bits[i] |= event->event_bits[i];  /* Write the new value into the thread data structure.  */  if (ps_pdwrite (th->th_ta_p->ph,		  ((char *) th->th_unique		   + offsetof (struct _pthread_descr_struct,			       p_eventbuf.eventmask)),		  &old_event, sizeof (td_thrhandle_t)) != PS_OK)    return TD_ERR;	/* XXX Other error value?  */  return TD_OK;}