Lock-Free Stack
A pop operation uses CAS to prevent lost updates and use-after-free bugs from unsynchronized code. A CAS-based stack can be fully concurrent without locks or deadlock risk. A lock-free stack uses CAS so only one thread updates the head poi…
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A pop operation uses CAS to prevent lost updates and use-after-free bugs from unsynchronized code. A CAS-based stack can be fully concurrent without locks or deadlock risk. A lock-free stack uses CAS so only one thread updates the head pointer successfully at a time during push. A push operation retries when another thread has already changed the stack head.