C++20: The Concurrent Future
A short introduction to concurrent future and all the new libraries and techniques which are predicted to be launched with C++20.
We'll cover the following...
It is difficult to make predictions, especially about the future (Niels Bohr). Therefore, I will make statements about the concurrency features of C++20.
Atomic Smart Pointers
The smart pointers std::shared_ptr and std::weak_ptr have a conceptional issue in concurrent programs: they share an intrinsically mutable state. Therefore, they are prone to data races and, thus, lead to undefined behavior. std::shared_ptr and std::weak_ptr guarantee that the incrementing or decrementing of the reference counter is an atomic operation and the resource will be deleted exactly once, but neither of them can guarantee that the ...