does presence of mutex help getting rid of volatile key word ?

Question

I have a multi-R/W lock class that keeps the read, write and pending read , pending write counters. A mutex guards them from multiple threads.

My question is Do we

Answer 1

While this may depend on the threading library you are using, my understanding is that any decent library will not require use of volatile.

In Pthreads, for example, use of a mutex will ensure that your data gets committed to memory correctly.

EDIT: I hereby endorse tony's answer as being better than my own.