A useful memory_order_consume is essentially unimplementable, to the point where the C++ standard itself says to not use it: https://eel.is/c++draft/atomics.ord

A useful memory_order_consume is essentially unimplementable, to the point where the C++ standard itself says to not use it: https://eel.is/c++draft/atomics.order#1.3 https://eel.is/c++draft/atomics.order#1.3