?Property)True if Property is a property of MutexId. Defined
- Mutex has the defined alias name. See mutex_create/2
using the‘alias' option.
- Current status of the mutex. One of
unlocked if the mutex
is currently not locked, or
locked(Owner, Count) if mutex
Count times by thread Owner. Note that unless Owner
is the calling thread, the locked status can change at any time. There
is no useful application of this property, except for diagnostic
and Count are fetched separately from the mutex, the values
may be inconsistent.