How to correctly destroy pthread mutex

Question

How exactly i can destroy a pthread mutex variable ?

Here is what i want to do. I want to have objects (structure variables) cached , which are looked up by key. I want

Answer 1

I couldn't agree more with caf on this. We have done something similar in certain implementation (e.g. refer ifData_createReference & ifData_removeReference routines in ifMIB.c). The basic idea is keeping a global lock to guard the entire object list and an object level lock for guarding individual entry in the list.

When we have to create a new entry in the list, take WRITE lock on the list and add a new entry, so that entry is added consistently to all the users of the list. And release the list lock.

When we have to look-up/access an entry from the list, take a READ lock on the list and search for the entry. Once we find the entry, take object lock in READ mode for read-only operations / take object lock in WRITE mode for modifying the object entry. Now, release the list lock. Now once we are done with processing of the object entry release the object lock as well.

When the object entry has to be removed from the list, take a WRITE lock on the list. Search and find the object entry in the list. Take a WRITE lock on the object entry, this will ensure that you are the ONLY current user for the object. Now remove the entry from the listing, as no one can search it any more in the list. And release the object lock immediately. Then, release the list lock. Now destroy the object and release the object resources.