collection in C++ Some assumed knowledge • You’ve heard of lock-free programming and know what a compare_exchange is • You know roughly what atomic does and what it is used for • You’ve heard of shared_ptr collection in C++ Some assumed knowledge • You’ve heard of lock-free programming and know what a compare_exchange is • You know roughly what atomic does and what it is used for • You’ve heard of shared_ptr shared_ptr load() • bool compare_exchange_weak(shared_ptr& expected, shared_ptr desired) • … compare_exchange(expected, desired) { if (current_value == expected) current_value = desired else expected