## Function: SB-THREAD:RELEASE-MUTEX
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> Release MUTEX by setting it to NIL. Wake up threads waiting for
> this mutex.
> 
> RELEASE-MUTEX is not interrupt safe: interrupts should be disabled
> around calls to it.
> 
> If the current thread is not the owner of the mutex then it silently
> returns without doing anything (if IF-NOT-OWNER is :PUNT), signals a
> WARNING (if IF-NOT-OWNER is :WARN), or releases the mutex anyway (if
> IF-NOT-OWNER is :FORCE).

### Lambda list
```cl
(sb-thread:mutex &key sb-thread::if-not-owner)
```