====== Critical regions ======
<code>
    mutex_name IS SERIOUS BUSINESS
      code_in_critical_region
    WTF
      code_to_run_if_mutex_is_unavailable
    KTHX
</code>

If there is no WTF clause, the process blocks attempting to grab the mutex.

Synonyms:  SRS BIZNIS, SRS BUSNESS, etc.

 --- //Geordan Rosario, 2007/05/30 21:14//