Is this lock-free .NET queue thread safe?

Question

My question is, is the class included below for a single-reader single-writer queue class thread-safe? This kind of queue is called lock-free, even if it will block if the queue

Answer 1

The presence of Sleep() makes a lock-free approach totally useless. The only reason to confront the complexities of a lock-free design is the need for absolute speed and to avoid the cost of Semaphores. The use of Sleep(1) defeats that purpose totally.