dynamic_cast, typeid  allocations  constexpr string & vector  Concurrency Changes  Atomic Smart Pointers  Joining & Cancellable Threads  The C++20 Synchronization Library  Semaphores, efficient Development on GitHub” -- Stephan T. Lavavej Tuesday, September 15 • 13:30Concurrency Changes35 Atomic Smart Pointers  Is shared_ptr thread safe?  Yes: control block manipulation thread safe  guarantees thread could be storing new pointer  Make it thread-safe?  Manually use mutex to protect access to smart pointer  Use global non-member atomic operations, e.g. std::atomic_load(), atomic_store(), … 

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Stage ★ Blockchain ★ Decentralized Ledger Storage: MPT (Merkle Patricia Tree) ★ K-V database ★ Smart Contract ★ Serverless The Weapons Web3 Utilizes For mainstream tech stack, e. g. Ethereum ➔ A world-wide