How do I write lock-free data structures?

Lock-free data structures are a crucial aspect of concurrent programming, enabling multiple threads to operate on shared data without the risk of deadlocks or contention. By using atomic operations and careful design, developers can create efficient and scalable data structures that perform well in multithreaded environments.

Example: Lock-Free Stack


        // A simple lock-free stack implementation in C++
        #include 

        template
        class LockFreeStack {
        private:
            struct Node {
                T data;
                Node* next;
                Node(T data) : data(data), next(nullptr) {}
            };

            std::atomic head;

        public:
            LockFreeStack() : head(nullptr) {}

            void push(T value) {
                Node* newNode = new Node(value);
                newNode->next = head.load();
                while (!head.compare_exchange_weak(newNode->next, newNode)) {
                    // Loop until we successfully set the new head
                }
            }

            bool pop(T& result) {
                Node* oldHead = head.load();
                while (oldHead != nullptr && !head.compare_exchange_weak(oldHead, oldHead->next)) {
                    // Loop until we successfully pop the head
                }
                if (oldHead == nullptr) {
                    return false; // Stack was empty
                }
                result = oldHead->data;
                delete oldHead; // Free the memory
                return true;
            }
        };

How do I write lock-free data structures?

Example: Lock-Free Stack

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How do I write lock-free data structures?

Example: Lock-Free Stack

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