Function cs_enter

src/sort.c:696–701

Enter a critical section. */

/* Enter a critical section.  */
static void
cs_enter (struct cs_status *status)
{
  int ret = pthread_sigmask (SIG_BLOCK, &caught_signals, &status->sigs);
  status->valid = ret == 0;
}

/* Leave a critical section.  */
static void